/* -------------------------------------------------------------------------- */
/*                                Design System                               */
/* -------------------------------------------------------------------------- */

:root {
    /* -------------------------------------------------------------------------- */
    /*                              Hyper Parameters                              */
    /* -------------------------------------------------------------------------- */

    /* --- Style Weight (Continuous) --- */
    /* 0.0 = Fine/Flat */
    /* 1.0 = Balanced */
    /* 2.0 = Heavy/Chunky */
    /* Can be any float: 0.5, 1.2, 2.5 etc. */
    --hp-style-weight: 1;

    /* --- Density (Continuous) --- */
    /* 0.5 = Compact */
    /* 1.0 = Standard */
    /* 1.5 = Spacious */
    --hp-density: 1;

    /* --- Contrast Range (Continuous) --- */
    /* Controls the "drama" or difference between: */
    /* - Smallest and Largest text sizes */
    /* - Lightest and Heaviest font weights */
    /* 0.0 = Flat/Uniform (Low contrast) */
    /* 1.0 = Standard */
    /* 2.0 = High Contrast (Dramatic size/weight diffs) */
    --hp-range: 1.0;

    /* --- Border & Shadow Scaling --- */
    --hp-border-scale: 1;
    /* 0 = No border (Floating), 1 = Standard, 2 = Thick */
    --hp-shadow-scale: 1;
    /* 0 = Flat, 1 = Standard, 2 = Deep/Soft */

    /* --- Corner Scale (NEW - independent of style weight) --- */
    /* 0 = Square (Metro/Software), 0.5 = Subtle, 1 = Standard, 2 = Rounded (Web) */
    --hp-corner-scale: 1;

    /* --- Sharpness (NEW - crisp vs soft aesthetic) --- */
    /* 0 = Soft/Diffuse, 1 = Balanced, 2 = Crisp/Sharp */
    /* Affects: shadow blur, border definition, color intensity */
    --hp-sharpness: 1;

    /* --- Color Seeds (Full HSL Control) --- */
    --hp-hue-1: 210;
    --hp-sat-1: 70;
    --hp-light-1: 50;

    --hp-hue-2: 340;
    --hp-sat-2: 70;
    --hp-light-2: 50;

    /* --- Shadow Controls --- */
    --hp-shadow-intensity: 0.15;
    --hp-shadow-blur: 1;

    /* --- Hover Intensity (NEW) --- */
    /* Controls how dramatic hover effects are */
    /* 0 = Subtle (minimal change), 1 = Standard, 2 = Dramatic */
    --hp-hover-intensity: 1;

    /* --- Global Scale --- */
    --hp-scale: 1;
    /* Overall Size Multiplier */

    /* ═══════════════════════════════════════════════════════════════════════════ */
    /*                            LIGHTNESS SCALE                                  */
    /* ═══════════════════════════════════════════════════════════════════════════ */
    /* 11-step scale from near-white to near-black */
    /* Used to generate consistent shade palettes for any hue */

    --l-50:  97%;   /* Subtle backgrounds, hover on white */
    --l-100: 94%;   /* Light backgrounds */
    --l-200: 86%;   /* Focus rings, subtle borders */
    --l-300: 77%;   /* Disabled states, light accents */
    --l-400: 66%;   /* Placeholder text, muted elements */
    --l-500: 50%;   /* BASE - Primary buttons, main color */
    --l-600: 42%;   /* Hover state */
    --l-700: 34%;   /* Active/pressed state */
    --l-800: 25%;   /* Dark text, strong emphasis */
    --l-900: 17%;   /* Headings, high contrast */
    --l-950: 10%;   /* Near black */

    /* -------------------------------------------------------------------------- */
    /*                             Derived Variables                              */
    /* -------------------------------------------------------------------------- */

    /* --- Calculations based on Style Weight & Scales --- */

    /* Border Width: Wider range for "Heavy" to "Fine" */
    /* Base 0.5px (Fine) to ~4px (Heavy) */
    --border-width-raw: calc(0.5px + (1.2px * var(--hp-style-weight)));
    --border-width: calc(var(--border-width-raw) * var(--hp-border-scale));

    /* Corner Radius: NOW INDEPENDENT of style weight */
    /* corner-scale 0 = 0px (Square/Metro), 1 = 6px (Standard), 2 = 12px (Rounded/Web) */
    --radius-factor: calc(0px + (6px * var(--hp-corner-scale)));

    /* Font Size Adjustment: Continuous */
    /* 0->-1px, 1->0, 2->+1px */
    --font-adjust: calc(0px + (1px * (var(--hp-style-weight) - 1)));

    /* ═══════════════════════════════════════════════════════════════════════════ */
    /*                          PRIMARY COLOR SCALE                                */
    /* ═══════════════════════════════════════════════════════════════════════════ */

    --c-primary-h: var(--hp-hue-1);
    --c-primary-s: calc(var(--hp-sat-1) * 1%);

    /* Full shade scale */
    --c-primary-50:  hsl(var(--c-primary-h), var(--c-primary-s), var(--l-50));
    --c-primary-100: hsl(var(--c-primary-h), var(--c-primary-s), var(--l-100));
    --c-primary-200: hsl(var(--c-primary-h), var(--c-primary-s), var(--l-200));
    --c-primary-300: hsl(var(--c-primary-h), var(--c-primary-s), var(--l-300));
    --c-primary-400: hsl(var(--c-primary-h), var(--c-primary-s), var(--l-400));
    --c-primary-500: hsl(var(--c-primary-h), var(--c-primary-s), var(--l-500));
    --c-primary-600: hsl(var(--c-primary-h), var(--c-primary-s), var(--l-600));
    --c-primary-700: hsl(var(--c-primary-h), var(--c-primary-s), var(--l-700));
    --c-primary-800: hsl(var(--c-primary-h), var(--c-primary-s), var(--l-800));
    --c-primary-900: hsl(var(--c-primary-h), var(--c-primary-s), var(--l-900));
    --c-primary-950: hsl(var(--c-primary-h), var(--c-primary-s), var(--l-950));

    /* Semantic aliases (backward compatible) */
    --c-primary: var(--c-primary-500);
    --c-primary-l: var(--l-500); /* For legacy compatibility */
    --c-primary-hover: var(--c-primary-600);
    --c-primary-active: var(--c-primary-700);
    --c-primary-bg: var(--c-primary-50);
    --c-primary-ring: var(--c-primary-200);

    /* ═══════════════════════════════════════════════════════════════════════════ */
    /*                         SECONDARY COLOR SCALE                               */
    /* ═══════════════════════════════════════════════════════════════════════════ */

    --c-secondary-h: var(--hp-hue-2);
    --c-secondary-s: calc(var(--hp-sat-2) * 1%);

    /* Full shade scale */
    --c-secondary-50:  hsl(var(--c-secondary-h), var(--c-secondary-s), var(--l-50));
    --c-secondary-100: hsl(var(--c-secondary-h), var(--c-secondary-s), var(--l-100));
    --c-secondary-200: hsl(var(--c-secondary-h), var(--c-secondary-s), var(--l-200));
    --c-secondary-300: hsl(var(--c-secondary-h), var(--c-secondary-s), var(--l-300));
    --c-secondary-400: hsl(var(--c-secondary-h), var(--c-secondary-s), var(--l-400));
    --c-secondary-500: hsl(var(--c-secondary-h), var(--c-secondary-s), var(--l-500));
    --c-secondary-600: hsl(var(--c-secondary-h), var(--c-secondary-s), var(--l-600));
    --c-secondary-700: hsl(var(--c-secondary-h), var(--c-secondary-s), var(--l-700));
    --c-secondary-800: hsl(var(--c-secondary-h), var(--c-secondary-s), var(--l-800));
    --c-secondary-900: hsl(var(--c-secondary-h), var(--c-secondary-s), var(--l-900));
    --c-secondary-950: hsl(var(--c-secondary-h), var(--c-secondary-s), var(--l-950));

    /* Semantic aliases */
    --c-secondary: var(--c-secondary-500);
    --c-secondary-l: var(--l-500);
    --c-secondary-hover: var(--c-secondary-600);
    --c-secondary-active: var(--c-secondary-700);

    /* ═══════════════════════════════════════════════════════════════════════════ */
    /*                          NEUTRAL COLOR SCALE                                */
    /* ═══════════════════════════════════════════════════════════════════════════ */
    /* Tinted grays - uses primary hue at very low saturation for cohesion */

    --c-neutral-s: calc(var(--hp-sat-1) * 0.08%); /* 8% of primary saturation */

    --c-neutral-50:  hsl(var(--c-primary-h), var(--c-neutral-s), var(--l-50));
    --c-neutral-100: hsl(var(--c-primary-h), var(--c-neutral-s), var(--l-100));
    --c-neutral-200: hsl(var(--c-primary-h), var(--c-neutral-s), var(--l-200));
    --c-neutral-300: hsl(var(--c-primary-h), var(--c-neutral-s), var(--l-300));
    --c-neutral-400: hsl(var(--c-primary-h), var(--c-neutral-s), var(--l-400));
    --c-neutral-500: hsl(var(--c-primary-h), var(--c-neutral-s), var(--l-500));
    --c-neutral-600: hsl(var(--c-primary-h), var(--c-neutral-s), var(--l-600));
    --c-neutral-700: hsl(var(--c-primary-h), var(--c-neutral-s), var(--l-700));
    --c-neutral-800: hsl(var(--c-primary-h), var(--c-neutral-s), var(--l-800));
    --c-neutral-900: hsl(var(--c-primary-h), var(--c-neutral-s), var(--l-900));
    --c-neutral-950: hsl(var(--c-primary-h), var(--c-neutral-s), var(--l-950));

    /* ═══════════════════════════════════════════════════════════════════════════ */
    /*                        SURFACE & BACKGROUND COLORS                          */
    /* ═══════════════════════════════════════════════════════════════════════════ */

    --c-bg: var(--c-neutral-50);
    --c-surface: hsl(var(--c-primary-h), var(--c-neutral-s), 100%);
    --c-surface-raised: var(--c-surface); /* Use with shadow for elevation */
    --c-surface-sunken: var(--c-neutral-100);

    /* Border Colors */
    --c-border: var(--c-neutral-200);
    --c-border-strong: var(--c-neutral-300);
    --c-border-subtle: var(--c-neutral-100);

    /* Text Colors */
    --c-text-main: var(--c-neutral-900);
    --c-text-muted: var(--c-neutral-500);
    --c-text-subtle: var(--c-neutral-400);
    --c-text-light: var(--c-neutral-50);

    /* ═══════════════════════════════════════════════════════════════════════════ */
    /*                           STATUS COLOR SCALES                               */
    /* ═══════════════════════════════════════════════════════════════════════════ */

    /* Success (Green) */
    --c-success-h: 145;
    --c-success-s: 70%;
    --c-success-50:  hsl(var(--c-success-h), var(--c-success-s), var(--l-50));
    --c-success-100: hsl(var(--c-success-h), var(--c-success-s), var(--l-100));
    --c-success-500: hsl(var(--c-success-h), var(--c-success-s), var(--l-500));
    --c-success-600: hsl(var(--c-success-h), var(--c-success-s), var(--l-600));
    --c-success-700: hsl(var(--c-success-h), var(--c-success-s), var(--l-700));
    --c-success-900: hsl(var(--c-success-h), var(--c-success-s), var(--l-900));
    --c-success: var(--c-success-500);
    --c-success-bg: var(--c-success-50);
    --c-success-text: var(--c-success-900);

    /* Warning (Amber) */
    --c-warning-h: 45;
    --c-warning-s: 90%;
    --c-warning-50:  hsl(var(--c-warning-h), var(--c-warning-s), var(--l-50));
    --c-warning-100: hsl(var(--c-warning-h), var(--c-warning-s), var(--l-100));
    --c-warning-500: hsl(var(--c-warning-h), var(--c-warning-s), 55%); /* Slightly lighter for visibility */
    --c-warning-600: hsl(var(--c-warning-h), var(--c-warning-s), var(--l-600));
    --c-warning-700: hsl(var(--c-warning-h), var(--c-warning-s), var(--l-700));
    --c-warning-900: hsl(var(--c-warning-h), var(--c-warning-s), 25%);
    --c-warning: var(--c-warning-500);
    --c-warning-bg: var(--c-warning-50);
    --c-warning-text: var(--c-warning-900);

    /* Danger (Red) */
    --c-danger-h: 0;
    --c-danger-s: 80%;
    --c-danger-50:  hsl(var(--c-danger-h), var(--c-danger-s), var(--l-50));
    --c-danger-100: hsl(var(--c-danger-h), var(--c-danger-s), var(--l-100));
    --c-danger-500: hsl(var(--c-danger-h), var(--c-danger-s), 55%);
    --c-danger-600: hsl(var(--c-danger-h), var(--c-danger-s), var(--l-600));
    --c-danger-700: hsl(var(--c-danger-h), var(--c-danger-s), var(--l-700));
    --c-danger-900: hsl(var(--c-danger-h), var(--c-danger-s), var(--l-900));
    --c-danger: var(--c-danger-500);
    --c-danger-bg: var(--c-danger-50);
    --c-danger-text: var(--c-danger-900);

    /* Info (Blue) */
    --c-info-h: 200;
    --c-info-s: 80%;
    --c-info-50:  hsl(var(--c-info-h), var(--c-info-s), var(--l-50));
    --c-info-100: hsl(var(--c-info-h), var(--c-info-s), var(--l-100));
    --c-info-500: hsl(var(--c-info-h), var(--c-info-s), 55%);
    --c-info-600: hsl(var(--c-info-h), var(--c-info-s), var(--l-600));
    --c-info-700: hsl(var(--c-info-h), var(--c-info-s), var(--l-700));
    --c-info-900: hsl(var(--c-info-h), var(--c-info-s), var(--l-900));
    --c-info: var(--c-info-500);
    --c-info-bg: var(--c-info-50);
    --c-info-text: var(--c-info-900);

    /* ═══════════════════════════════════════════════════════════════════════════ */
    /*                            HOVER EFFECTS SYSTEM                             */
    /* ═══════════════════════════════════════════════════════════════════════════ */
    /* Controlled by --hp-hover-intensity (0=subtle, 1=standard, 2=dramatic) */

    /* Color shift: how much darker on hover (lightness reduction) */
    --hover-color-shift: calc(8% * var(--hp-hover-intensity));

    /* Shadow lift: elevated shadow on hover */
    --hover-shadow-lift: calc(4px * var(--hp-hover-intensity));
    --hover-shadow-spread: calc(8px * var(--hp-hover-intensity));
    --hover-shadow-opacity: calc(var(--hp-shadow-intensity) * (1 + (0.5 * var(--hp-hover-intensity))));

    /* Border emphasis: darker/more visible border on hover */
    --hover-border-darken: calc(10% * var(--hp-hover-intensity));

    /* Transform: subtle lift effect */
    --hover-translate-y: calc(-1px * var(--hp-hover-intensity));
    --hover-scale: calc(1 + (0.01 * var(--hp-hover-intensity)));

    /* Transition timing */
    --hover-transition: all 0.2s ease;

    /* Pre-computed hover shadows */
    --shadow-hover:
        0 var(--hover-shadow-lift) var(--hover-shadow-spread) 0 hsla(var(--c-primary-h), 10%, 10%, var(--hover-shadow-opacity)),
        0 calc(var(--hover-shadow-lift) * 2) calc(var(--hover-shadow-spread) * 2) 0 hsla(var(--c-primary-h), 10%, 10%, calc(var(--hover-shadow-opacity) * 0.5));

    /* ═══════════════════════════════════════════════════════════════════════════ */
    /*                              GRADIENTS                                      */
    /* ═══════════════════════════════════════════════════════════════════════════ */

    --c-primary-gradient: linear-gradient(135deg, var(--c-primary-500) 0%, var(--c-primary-600) 100%);
    --c-secondary-gradient: linear-gradient(135deg, var(--c-secondary-500) 0%, var(--c-secondary-600) 100%);
    --c-vibrant-gradient: linear-gradient(135deg, var(--c-primary-500) 0%, var(--c-secondary-500) 100%);

    /* Accent Color (complementary) */
    --c-accent-h: calc(var(--hp-hue-1) + 30);
    --c-accent: hsl(var(--c-accent-h), var(--c-primary-s), var(--l-500));

    /* Medal/Rank Colors */
    --c-gold: hsl(45, 100%, 50%);
    --c-silver: hsl(0, 0%, 75%);
    --c-bronze: hsl(30, 60%, 50%);
    --c-platinum: hsl(180, 10%, 90%);

    /* Achievement Gradient */
    --c-achievement-gradient: linear-gradient(135deg, hsl(0, 80%, 70%) 0%, hsl(25, 90%, 60%) 100%);

    /* --- Shadows (Intensity + Blur Control) --- */
    /* --hp-shadow-intensity: 0-0.5 (opacity of shadow) */
    /* --hp-shadow-blur: 0.5-2 (blur multiplier, higher = softer) */
    --shadow-sm:
        0 1px calc(2px * var(--hp-shadow-blur)) 0 hsla(var(--hp-hue-1), 10%, 10%, var(--hp-shadow-intensity)),
        0 2px calc(4px * var(--hp-shadow-blur)) 0 hsla(var(--hp-hue-1), 10%, 10%, calc(var(--hp-shadow-intensity) * 0.5));
    --shadow-md:
        0 2px calc(4px * var(--hp-shadow-blur)) 0 hsla(var(--hp-hue-1), 10%, 10%, var(--hp-shadow-intensity)),
        0 4px calc(8px * var(--hp-shadow-blur)) 0 hsla(var(--hp-hue-1), 10%, 10%, calc(var(--hp-shadow-intensity) * 0.7));
    --shadow-lg:
        0 4px calc(8px * var(--hp-shadow-blur)) 0 hsla(var(--hp-hue-1), 10%, 10%, var(--hp-shadow-intensity)),
        0 8px calc(16px * var(--hp-shadow-blur)) 0 hsla(var(--hp-hue-1), 10%, 10%, calc(var(--hp-shadow-intensity) * 0.8));

    /* --- Typography --- */
    --font-family-pri: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-family-sec: 'Outfit', sans-serif;

    --base-size: 16px;
    /* Apply Style Weight Adjustment to Font Size */
    --font-size-root: calc((var(--base-size) + var(--font-adjust)) * var(--hp-scale));

    /* Derived Type Scale from Range */
    /* Range 0 -> Ratio 1.0 (Flat) */
    /* Range 1 -> Ratio 1.2 (Minor Third) */
    /* Range 2 -> Ratio 1.5 (Perfect Fifth) */
    --type-ratio: calc(1.0 + (0.25 * var(--hp-range)));

    /* Derived Font Weights from Range */
    /* Range 0 -> Light: 400, Bold: 400 (All same) */
    /* Range 1 -> Light: 300, Bold: 600 */
    /* Range 2 -> Light: 200, Bold: 800 */
    --fw-base: 400;
    --fw-light: calc(400 - (100 * var(--hp-range)));
    --fw-bold: calc(400 + (200 * var(--hp-range)));

    /* Modular Scale Calculations */
    --text-xs: calc(var(--text-base) / var(--type-ratio));
    --text-sm: calc(var(--text-base) / var(--type-ratio) * 1.1);
    --text-base: 1rem;
    --text-lg: calc(var(--text-base) * var(--type-ratio));
    --text-xl: calc(var(--text-lg) * var(--type-ratio));
    --text-2xl: calc(var(--text-xl) * var(--type-ratio));
    --text-3xl: calc(var(--text-2xl) * var(--type-ratio));
    --text-4xl: calc(var(--text-3xl) * var(--type-ratio));

    /* --- Spacing --- */
    /* Density affects the space unit */
    --space-unit: calc(0.25rem * var(--hp-scale) * var(--hp-density));
    --space-1: calc(var(--space-unit) * 1);
    --space-2: calc(var(--space-unit) * 2);
    --space-3: calc(var(--space-unit) * 3);
    --space-4: calc(var(--space-unit) * 4);
    --space-6: calc(var(--space-unit) * 6);
    --space-8: calc(var(--space-unit) * 8);
    --space-12: calc(var(--space-unit) * 12);

    /* --- Borders & Effects --- */
    --radius-base: var(--radius-factor);
    --radius-sm: calc(var(--radius-base) * 0.5);
    --radius-md: var(--radius-base);
    --radius-lg: calc(var(--radius-base) * 2);
    --radius-full: 9999px;

    --shadow-glass: 0 8px 32px 0 rgba(31, 38, 135, 0.15);

    --glass-bg: rgba(255, 255, 255, 0.25);
    --glass-border: rgba(255, 255, 255, 0.18);
}

/* -------------------------------------------------------------------------- */
/*                                 Dark Mode                                  */
/* -------------------------------------------------------------------------- */
@media (prefers-color-scheme: dark) {
    :root {
        --c-bg-l: 10%;
        --c-surface-l: 15%;
        --c-text-main: hsl(var(--hp-hue-seed-1), 10%, 90%);
        --c-text-muted: hsl(var(--hp-hue-seed-1), 10%, 60%);

        --glass-bg: rgba(0, 0, 0, 0.25);
        --glass-border: rgba(255, 255, 255, 0.05);
    }
}

/* -------------------------------------------------------------------------- */
/*                                   Reset                                    */
/* -------------------------------------------------------------------------- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: var(--font-size-root);
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-pri);
    background-color: var(--c-bg);
    color: var(--c-text-main);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

/* -------------------------------------------------------------------------- */
/*                                 Typography                                 */
/* -------------------------------------------------------------------------- */
/* --- Typography Utilities --- */
.font-light {
    font-weight: var(--fw-light);
}

.font-base {
    font-weight: var(--fw-base);
}

.font-bold {
    font-weight: var(--fw-bold);
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-family-sec);
    font-weight: var(--fw-bold);
    line-height: 1.2;
    margin-bottom: var(--space-2);
    color: var(--c-text-main);
}

h1 {
    font-size: var(--text-4xl);
}

h2 {
    font-size: var(--text-3xl);
}

h3 {
    font-size: var(--text-2xl);
}

h4 {
    font-size: var(--text-xl);
}

h5 {
    font-size: var(--text-lg);
}

h6 {
    font-size: var(--text-base);
}

p {
    margin-bottom: var(--space-2);
    line-height: 1.6;
    font-weight: var(--fw-base);
}

.text-sm {
    font-size: var(--text-sm);
}

.text-xs {
    font-size: var(--text-xs);
}

.text-muted {
    color: var(--c-text-muted);
}

.text-lg {
    font-size: var(--text-lg);
}

.text-xl {
    font-size: var(--text-xl);
}

.text-2xl {
    font-size: var(--text-2xl);
}

.text-3xl {
    font-size: var(--text-3xl);
}

.text-4xl {
    font-size: var(--text-4xl);
}

a {
    color: var(--c-primary);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--c-secondary);
}

/* -------------------------------------------------------------------------- */
/*                                 Components                                 */
/* -------------------------------------------------------------------------- */

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: var(--text-sm);
    cursor: pointer;
    transition: var(--hover-transition);
    border: var(--border-width) solid transparent;
    gap: var(--space-2);
    box-shadow: var(--shadow-sm);
}

.btn-pri {
    background-color: var(--c-primary-500);
    color: var(--c-text-light);
    text-shadow: 0 1px 1px rgba(0, 0, 0, 0.2);
    border-color: var(--c-primary-600);
}

.btn-pri:hover {
    background-color: var(--c-primary-600);
    border-color: var(--c-primary-700);
    transform: translateY(var(--hover-translate-y));
    box-shadow: var(--shadow-hover);
}

.btn-pri:active {
    background-color: var(--c-primary-700);
    border-color: var(--c-primary-800);
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.btn-sec {
    background-color: var(--c-surface);
    border: var(--border-width) solid var(--c-neutral-300);
    color: var(--c-text-main);
}

.btn-sec:hover {
    background-color: var(--c-neutral-50);
    border-color: var(--c-neutral-400);
    transform: translateY(var(--hover-translate-y));
    box-shadow: var(--shadow-hover);
}

.btn-sec:active {
    background-color: var(--c-neutral-100);
    border-color: var(--c-neutral-500);
    transform: translateY(0);
}

.btn-ghost {
    background-color: transparent;
    color: var(--c-text-main);
    box-shadow: none;
}

.btn-ghost:hover {
    background-color: var(--c-neutral-100);
    color: var(--c-text-main);
    transform: translateY(var(--hover-translate-y));
}

.btn-ghost:active {
    background-color: var(--c-neutral-200);
    transform: translateY(0);
}

/* Danger button variant */
.btn-danger {
    background-color: var(--c-danger-500);
    color: var(--c-text-light);
    border-color: var(--c-danger-600);
}

.btn-danger:hover {
    background-color: var(--c-danger-600);
    border-color: var(--c-danger-700);
    transform: translateY(var(--hover-translate-y));
    box-shadow: var(--shadow-hover);
}

/* --- Cards --- */
.card {
    background-color: var(--c-surface);
    border-radius: var(--radius-md);
    padding: var(--space-6);
    box-shadow: var(--shadow-sm);
    border: var(--border-width) solid var(--c-border);
    min-width: 0;
    transition: var(--hover-transition);
}

.card-interactive:hover {
    border-color: var(--c-border-strong);
    box-shadow: var(--shadow-hover);
    transform: translateY(var(--hover-translate-y));
}

.card-glass {
    background: var(--glass-bg);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: var(--border-width) solid var(--glass-border);
    box-shadow: var(--shadow-glass);
}

/* --- Inputs --- */
.input {
    width: 100%;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    border: var(--border-width) solid var(--c-border);
    background-color: var(--c-surface);
    color: var(--c-text-main);
    font-family: inherit;
    font-size: var(--text-sm);
    transition: all 0.2s;
}

.input:focus {
    outline: none;
    border-color: var(--c-primary-500);
    box-shadow: 0 0 0 3px var(--c-primary-200);
}

/* --- Utilities --- */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}

.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

.grid {
    display: grid;
    gap: var(--space-4);
}

.mt-4 {
    margin-top: var(--space-4);
}

.mb-4 {
    margin-bottom: var(--space-4);
}

.p-4 {
    padding: var(--space-4);
}

.text-center {
    text-align: center;
}

/* --- Switch / Toggle --- */
.switch {
    position: relative;
    display: inline-block;
    width: 48px;
    height: 24px;
    margin-right: var(--space-2);
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--c-surface);
    border: var(--border-width) solid var(--c-border);
    transition: .3s;
    border-radius: 24px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 2px;
    bottom: 1px;
    background-color: var(--c-text-muted);
    transition: .3s;
    border-radius: 50%;
}

input:checked+.slider {
    background-color: var(--c-primary);
    border-color: var(--c-primary);
}

input:checked+.slider:before {
    transform: translateX(24px);
    background-color: var(--c-text-light);
}

/* --- Range Slider --- */
input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    background: var(--c-border);
    border-radius: var(--radius-sm);
    outline: none;
    cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    background: var(--c-primary);
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid var(--c-surface);
    box-shadow: var(--shadow-sm);
    transition: all 0.15s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
}

input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    background: var(--c-primary);
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid var(--c-surface);
    box-shadow: var(--shadow-sm);
}

input[type="range"]::-moz-range-track {
    height: 6px;
    background: var(--c-border);
    border-radius: var(--radius-sm);
}

/* --- Badge --- */
.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-sm {
    padding: 1px 6px;
    font-size: 9px;
    font-weight: 500;
    letter-spacing: 0.3px;
}

/* Soft badges - light background, dark text (default style) */
.badge-pri {
    background-color: var(--c-primary-100);
    color: var(--c-primary-700);
}

.badge-sec {
    background-color: var(--c-secondary-100);
    color: var(--c-secondary-700);
}

.badge-outline {
    background-color: transparent;
    border: 1px solid var(--c-neutral-300);
    color: var(--c-text-muted);
}

.badge-success {
    background-color: var(--c-success-100);
    color: var(--c-success-700);
}

.badge-warning {
    background-color: var(--c-warning-100);
    color: var(--c-warning-700);
}

.badge-error {
    background-color: var(--c-danger-100);
    color: var(--c-danger-700);
}

.badge-info {
    background-color: var(--c-info-100);
    color: var(--c-info-700);
}

/* Solid badges - full color background */
.badge-pri-solid {
    background-color: var(--c-primary-500);
    color: var(--c-text-light);
}

.badge-success-solid {
    background-color: var(--c-success-500);
    color: white;
}

.badge-warning-solid {
    background-color: var(--c-warning-500);
    color: var(--c-warning-900);
}

.badge-error-solid {
    background-color: var(--c-danger-500);
    color: white;
}

/* --- Alerts --- */
.alert {
    display: flex;
    align-items: center;
    width: 100%;
    padding: var(--space-3) var(--space-4);
    border: var(--border-width) solid var(--c-border);
    background: var(--c-surface);
    color: var(--c-text-main);
    border-radius: var(--radius-md);
    gap: var(--space-3);
}

.alert-success {
    background: var(--c-success-bg);
    border-color: var(--c-success);
    color: var(--c-success-text);
}

.alert-warning {
    background: var(--c-warning-bg);
    border-color: var(--c-warning);
    color: var(--c-warning-text);
}

.alert-error {
    background: var(--c-danger-bg);
    border-color: var(--c-danger);
    color: var(--c-danger-text);
}

.alert-info {
    background: var(--c-info-bg);
    border-color: var(--c-info);
    color: var(--c-info-text);
}

/* --- Avatar --- */
.avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--c-surface);
    border: var(--border-width) solid var(--c-border);
    overflow: hidden;
    font-weight: 700;
    color: var(--c-primary);
    font-size: var(--text-sm);
}

.avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.avatar-sm {
    width: 32px;
    height: 32px;
    font-size: var(--text-xs);
}

.avatar-lg {
    width: 64px;
    height: 64px;
    font-size: var(--text-lg);
}

/* --- Tooltip --- */
.tooltip-wrapper {
    position: relative;
    display: inline-block;
}

.tooltip {
    visibility: hidden;
    background-color: var(--c-text-main);
    color: var(--c-bg);
    text-align: center;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    position: absolute;
    z-index: 1;
    bottom: 125%;
    /* Position above */
    left: 50%;
    transform: translateX(-50%);
    opacity: 0;
    transition: opacity 0.3s;
    font-size: var(--text-xs);
    white-space: nowrap;
    pointer-events: none;
}

.tooltip::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 50%;
    margin-left: -5px;
    border-width: 5px;
    border-style: solid;
    border-color: var(--c-text-main) transparent transparent transparent;
}

.tooltip-wrapper:hover .tooltip {
    visibility: visible;
    opacity: 1;
}

/* --- Progress Bar --- */
.progress-container {
    width: 100%;
    background-color: var(--c-neutral-200);
    border-radius: 999px;
    overflow: hidden;
    height: 8px;
}

.progress-bar {
    height: 100%;
    background-color: var(--c-primary);
    width: 0%;
    transition: width 0.5s ease;
    border-radius: 999px;
}

.progress-bar.progress-success {
    background-color: var(--c-success);
}

.progress-bar.progress-warning {
    background-color: var(--c-warning);
}

.progress-bar.progress-error {
    background-color: var(--c-danger);
}

.progress-bar.progress-secondary {
    background-color: var(--c-secondary);
}

.progress-striped {
    background-image: linear-gradient(45deg,
            rgba(255, 255, 255, 0.15) 25%,
            transparent 25%,
            transparent 50%,
            rgba(255, 255, 255, 0.15) 50%,
            rgba(255, 255, 255, 0.15) 75%,
            transparent 75%,
            transparent);
    background-size: 1rem 1rem;
}

/* --- Analytics Components --- */

/* Stat Card */
.stat-card {
    background: var(--c-surface);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    border: var(--border-width) solid var(--c-border-subtle);
    box-shadow: var(--shadow-sm);
}

.stat-label {
    font-size: var(--text-xs);
    color: var(--c-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.stat-value {
    font-size: var(--text-3xl);
    font-weight: var(--fw-bold);
    color: var(--c-text-main);
    line-height: 1;
    margin-bottom: var(--space-2);
}

.stat-trend {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    font-size: var(--text-sm);
}

.stat-trend.positive {
    color: var(--c-success);
}

.stat-trend.negative {
    color: var(--c-danger);
}

.stat-trend.neutral {
    color: var(--c-text-muted);
}

/* KPI Card */
.kpi-card {
    background: var(--c-surface);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    border: var(--border-width) solid var(--c-border-subtle);
    box-shadow: var(--shadow-sm);
}

.kpi-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-3);
}

.kpi-title {
    font-size: var(--text-sm);
    color: var(--c-text-muted);
    font-weight: 600;
}

.kpi-values {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: var(--space-3);
}

.kpi-actual {
    font-size: var(--text-2xl);
    font-weight: var(--fw-bold);
    color: var(--c-text-main);
}

.kpi-target {
    font-size: var(--text-sm);
    color: var(--c-text-muted);
}

.kpi-progress-wrapper {
    margin-top: var(--space-2);
}

/* Metric Grid */
.metric-grid {
    display: grid;
    gap: var(--space-4);
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* --- Tables --- */
.table {
    width: 100%;
    border-collapse: collapse;
    background: var(--c-surface);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: var(--border-width) solid var(--c-border);
}

.table-header-row {
    background-color: var(--c-neutral-50);
}

.table-header-cell {
    text-align: left;
    padding: var(--space-3) var(--space-4);
    border-bottom: var(--border-width) solid var(--c-border);
    color: var(--c-text-muted);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.table-row {
    border-bottom: var(--border-width) solid var(--c-border-subtle);
    transition: background-color 0.15s;
}

.table-row:last-child {
    border-bottom: none;
}

.table-row:hover {
    background-color: var(--c-primary-50);
}

.table-cell {
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-sm);
    color: var(--c-text-main);
}

/* Striped table variant */
.table-striped .table-row:nth-child(even) {
    background-color: var(--c-neutral-50);
}

.table-striped .table-row:nth-child(even):hover {
    background-color: var(--c-primary-50);
}

/* Trend Indicator */
.trend-indicator {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    font-weight: 600;
}

.trend-arrow {
    font-size: 1.2em;
}

.trend-indicator.up {
    color: var(--c-success);
}

.trend-indicator.down {
    color: var(--c-danger);
}

.trend-indicator.flat {
    color: var(--c-text-muted);
}

/* Chart Card */
.chart-card {
    background: var(--c-surface);
    border-radius: var(--radius-md);
    padding: var(--space-6);
    border: var(--border-width) solid var(--c-border-subtle);
    box-shadow: var(--shadow-sm);
}

.chart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-4);
    padding-bottom: var(--space-3);
    border-bottom: var(--border-width) solid var(--c-border);
}

.chart-title {
    font-size: var(--text-lg);
    font-weight: var(--fw-bold);
    color: var(--c-text-main);
}

.chart-controls {
    display: flex;
    gap: var(--space-2);
}

.chart-body {
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}


/* --- Tree / File Explorer --- */
.tree {
    font-family: var(--font-family-pri);
    font-size: var(--text-sm);
    line-height: 1.6;
}

.tree-item {
    display: flex;
    align-items: center;
    padding: var(--space-1) var(--space-2);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: background-color 0.2s;
    user-select: none;
}

.tree-item:hover {
    background-color: var(--c-neutral-100);
}

.tree-item-icon {
    margin-right: var(--space-2);
    font-size: 1em;
    min-width: 16px;
    text-align: center;
}

.tree-item-label {
    flex: 1;
}

.tree-item-size {
    margin-left: var(--space-2);
    font-size: var(--text-xs);
    color: var(--c-text-muted);
}

.tree-children {
    margin-left: var(--space-4);
    border-left: 1px solid var(--c-border);
    padding-left: var(--space-2);
}

.tree-item-toggle {
    margin-right: var(--space-1);
    font-size: 0.8em;
    color: var(--c-text-muted);
    min-width: 12px;
}

/* --- Heatmap --- */
.heatmap {
    display: inline-block;
}

.heatmap-grid {
    display: grid;
    gap: 2px;
    grid-auto-flow: column;
}

.heatmap-cell {
    width: 12px;
    height: 12px;
    border-radius: 2px;
    background-color: var(--c-neutral-100);
    transition: all 0.2s;
    cursor: pointer;
}

.heatmap-cell:hover {
    transform: scale(1.2);
    box-shadow: 0 0 4px rgba(0, 0, 0, 0.3);
}

.heatmap-cell[data-level="0"] {
    background-color: var(--c-neutral-100);
}

.heatmap-cell[data-level="1"] {
    background-color: hsl(var(--c-primary-h), 40%, 85%);
}

.heatmap-cell[data-level="2"] {
    background-color: hsl(var(--c-primary-h), 50%, 70%);
}

.heatmap-cell[data-level="3"] {
    background-color: hsl(var(--c-primary-h), 60%, 55%);
}

.heatmap-cell[data-level="4"] {
    background-color: hsl(var(--c-primary-h), 70%, 45%);
}

.heatmap-legend {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-top: var(--space-3);
    font-size: var(--text-xs);
    color: var(--c-text-muted);
}

.heatmap-legend-scale {
    display: flex;
    gap: 2px;
}

/* --- Sparkline --- */
.sparkline {
    display: inline-block;
    height: 32px;
    position: relative;
}

.sparkline-svg {
    display: block;
}

/* --- Data Widget --- */
.data-widget {
    background: var(--c-surface);
    border-radius: var(--radius-md);
    border: var(--border-width) solid var(--c-border-subtle);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.data-widget-header {
    padding: var(--space-4);
    border-bottom: var(--border-width) solid var(--c-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.data-widget-title {
    font-size: var(--text-lg);
    font-weight: var(--fw-bold);
    color: var(--c-text-main);
}

.data-widget-body {
    padding: var(--space-4);
}

.data-widget-footer {
    padding: var(--space-3) var(--space-4);
    border-top: var(--border-width) solid var(--c-border);
    background: var(--c-neutral-50);
    font-size: var(--text-sm);
    color: var(--c-text-muted);
}

/* --- Gauge --- */
.gauge {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
}

.gauge-circle {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.gauge-svg {
    display: block;
}

.gauge-value {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: var(--text-lg);
    font-weight: var(--fw-bold);
    color: var(--c-text-main);
    pointer-events: none;
}

.gauge-label {
    text-align: center;
    font-size: var(--text-xs);
    color: var(--c-text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* --- Timeline --- */
.timeline {
    position: relative;
    padding-left: var(--space-6);
}

.timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--c-border);
}

.timeline-item {
    position: relative;
    padding-bottom: var(--space-6);
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-marker {
    position: absolute;
    left: -22px;
    top: 4px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--c-primary);
    border: 3px solid var(--c-surface);
    box-shadow: 0 0 0 2px var(--c-primary);
}

.timeline-content {
    background: var(--c-surface);
    padding: var(--space-3);
    border-radius: var(--radius-md);
    border: var(--border-width) solid var(--c-border-subtle);
}

.timeline-title {
    font-weight: var(--fw-bold);
    margin-bottom: var(--space-1);
}

.timeline-time {
    font-size: var(--text-xs);
    color: var(--c-text-muted);
    margin-bottom: var(--space-2);
}

.timeline-description {
    font-size: var(--text-sm);
    color: var(--c-text-main);
}

/* Animations */
@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

@keyframes shimmer {
    0% {
        background-position: 200% 0;
    }

    100% {
        background-position: -200% 0;
    }
}

/* --- Contribution Graph --- */
.contribution-cell {
    transition: all 0.2s;
    cursor: pointer;
}

.contribution-cell:hover {
    transform: scale(1.2);
    box-shadow: 0 0 4px rgba(0, 0, 0, 0.3);
}

.contribution-cell[data-level="0"] {
    background-color: var(--c-neutral-100);
}

.contribution-cell[data-level="1"] {
    background-color: hsl(var(--c-primary-h), 40%, 85%);
}

.contribution-cell[data-level="2"] {
    background-color: hsl(var(--c-primary-h), 50%, 70%);
}

.contribution-cell[data-level="3"] {
    background-color: hsl(var(--c-primary-h), 60%, 55%);
}

.contribution-cell[data-level="4"] {
    background-color: hsl(var(--c-primary-h), 70%, 45%);
}

/* --- Advanced Charts (Phase 8) --- */
.chart-container {
    position: relative;
    width: 100%;
    max-width: 100%;
    height: 100%;
    overflow: hidden;
}

.chart-svg {
    display: block;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.chart-tooltip {
    position: absolute;
    /* Changed to absolute for body-relative positioning */
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-md);
    font-size: var(--text-xs);
    pointer-events: none;
    z-index: 9999;
    /* High z-index for fixed tooltip */
    opacity: 0;
    transition: opacity 0.2s;
    white-space: nowrap;
}

.chart-bar {
    transition: all 0.3s ease;
    cursor: pointer;
}

.chart-bar:hover {
    opacity: 0.8;
}

.chart-line {
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    transition: stroke-dashoffset 1s ease;
}

.chart-dot {
    stroke-width: 2;
    transition: r 0.2s;
    cursor: pointer;
}

.chart-dot:hover {
    r: 6;
}

.chart-axis text {
    font-size: 10px;
    fill: var(--c-text-muted);
}

.chart-axis line,
.chart-axis path {
    stroke: var(--c-border);
}

.chart-grid line {
    stroke: var(--c-border-subtle);
    stroke-dasharray: 4;
}

.chart-slice {
    transition: transform 0.3s;
    cursor: pointer;
}

.chart-slice:hover {
    transform: scale(1.05);
    transform-origin: center;
}

.chart-radar-area {
    fill-opacity: 0.2;
    transition: fill-opacity 0.3s;
}

.chart-radar-area:hover {
    fill-opacity: 0.4;
}

/* Theme Controls */
.controls {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--c-surface);
    padding: var(--space-4);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    border: var(--border-width) solid var(--c-border);
    width: 300px;
    z-index: 1000;
    display: none;
    /* Hidden by default */
}

.controls.active {
    display: block;
}

.control-group {
    margin-bottom: var(--space-2);
}

.control-group label {
    display: block;
    font-size: var(--text-xs);
    font-weight: 600;
    margin-bottom: var(--space-1);
}

.control-group input {
    width: 100%;
}

.controls-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-4);
}

.controls-header h3 {
    margin: 0;
}

.btn-show-controls {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    display: block;
    padding: 8px 16px;
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    cursor: pointer;
    font-family: inherit;
    font-weight: 500;
}

.btn-close-controls {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--c-text-muted);
    line-height: 1;
    padding: 0;
}

@media (max-width: 768px) {
    .controls {
        position: static;
        width: 100%;
        margin-bottom: var(--space-4);
        box-shadow: none;
        border: 1px solid var(--c-border);
    }

    .btn-show-controls {
        top: auto;
        bottom: 20px;
        right: 20px;
    }
}

/* -------------------------------------------------------------------------- */
/*                              Utility Classes                                */
/* -------------------------------------------------------------------------- */

/* Layout */
.flex { display: flex; }
.flex-1 { flex: 1; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-end { align-items: flex-end; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.w-full { width: 100%; }

/* Overflow */
.overflow-auto { overflow: auto; }
.overflow-y-auto { overflow-y: auto; }
.overflow-hidden { overflow: hidden; }
.scroll-panel { overflow-y: auto; max-height: calc(100vh - 120px); }

/* Spacing */
.p-1 { padding: var(--space-1); }
.p-2 { padding: var(--space-2); }
.p-3 { padding: var(--space-3); }
.p-4 { padding: var(--space-4); }
.p-5 { padding: var(--space-5); }
.p-6 { padding: var(--space-6); }
.px-1 { padding-left: var(--space-1); padding-right: var(--space-1); }
.pt-0 { padding-top: 0; }
.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.m-1 { margin: var(--space-1); }
.m-2 { margin: var(--space-2); }
.m-3 { margin: var(--space-3); }
.m-4 { margin: var(--space-4); }
.m-5 { margin: var(--space-5); }
.m-6 { margin: var(--space-6); }
.mx-2 { margin-left: var(--space-2); margin-right: var(--space-2); }
.mx-3 { margin-left: var(--space-3); margin-right: var(--space-3); }
.mx-4 { margin-left: var(--space-4); margin-right: var(--space-4); }
.my-2 { margin-top: var(--space-2); margin-bottom: var(--space-2); }
.my-3 { margin-top: var(--space-3); margin-bottom: var(--space-3); }
.ml-2 { margin-left: var(--space-2); }
.mr-2 { margin-right: var(--space-2); }

/* Text colors */
.text-pri { color: var(--c-primary); }
.text-success { color: var(--c-success); }
.text-warning { color: var(--c-warning); }
.text-danger { color: var(--c-danger); }

/* Sidebar */
.sidebar {
    background: var(--c-surface);
    border-right: var(--border-width) solid var(--c-border);
    padding: var(--space-3) 0;
}

.sidebar-section {
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--c-text-muted);
    padding: var(--space-3) var(--space-4);
    margin-top: var(--space-2);
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-2) var(--space-4);
    margin: var(--space-1) var(--space-2);
    border-radius: var(--radius-md);
    cursor: pointer;
    color: var(--c-text-main);
    font-size: var(--text-sm);
    transition: background 0.15s;
}

.sidebar-link:hover {
    background: var(--c-bg);
}

.sidebar-link.active {
    background: var(--c-primary-100);
    color: var(--c-primary-700);
    font-weight: 500;
}

.sidebar-link i {
    width: 20px;
    color: var(--c-text-muted);
}

.sidebar-link.active i {
    color: var(--c-primary-600);
}

/* Borders */
.border { border: var(--border-width) solid var(--c-border); }
.border-b { border-bottom: var(--border-width) solid var(--c-border, rgba(0,0,0,0.1)); }
.border-r { border-right: var(--border-width) solid var(--c-border); }
.rounded { border-radius: var(--radius-sm); }

/* Backgrounds */
.bg-white { background-color: var(--c-surface); }
.bg-gray-50 { background-color: var(--c-bg); }
.bg-gray-100 { background-color: var(--c-surface); }

/* Positioning */
.relative { position: relative; }
.absolute { position: absolute; }

/* Padding left */
.pl-8 { padding-left: var(--space-8); }

/* Margin right */
.mr-2 { margin-right: var(--space-2); }

/* Text truncate */
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* Search icon positioning */
.search-icon { left: var(--space-3); top: 50%; transform: translateY(-50%); opacity: 0.5; }

/* Selector list item */
.selector-item {
    display: flex;
    align-items: flex-start;
    padding: var(--space-3);
    border-bottom: var(--border-width) solid var(--c-border);
    cursor: pointer;
    position: relative;
    transition: background 0.15s;
}
.selector-item:last-child { border-bottom: none; }
.selector-item:hover { background: var(--c-bg); }
.selector-item.selected { background: var(--c-primary-50); }

/* Selector item content */
.selector-content { flex: 1; min-width: 0; }
.selector-head { font-weight: 600; font-size: var(--text-sm); margin-bottom: 2px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.selector-body { font-size: var(--text-sm); color: var(--c-text-muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* Selector badge container */
.selector-badge-container {
    position: absolute;
    top: var(--space-3);
    right: var(--space-3);
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: var(--space-1);
}

/* Selector icon */
.selector-icon {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--c-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-sm);
    margin-right: var(--space-3);
    flex-shrink: 0;
}

/* Action overlay on hover */
.selector-actions {
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    padding: 0 var(--space-3);
    background: linear-gradient(to right, transparent, var(--c-surface) 20%);
    opacity: 0;
    transition: opacity 0.15s;
}
.selector-item:hover .selector-actions { opacity: 1; }

/* Selector editor container */
.publon-selector-editor {
    margin-bottom: var(--space-4);
}

/* Grid layouts */
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
.grid-auto-fr { grid-template-columns: auto 1fr; }
.col-span-2 { grid-column: span 2; }
.grid-350-fr { grid-template-columns: 350px 1fr; }
.grid-meas-3 { grid-template-columns: 1fr 1fr 80px; }
.grid-meas-4a { grid-template-columns: 60px 1fr 70px 80px; }
.grid-meas-4b { grid-template-columns: 80px 1fr 100px; }

/* Modal overlay */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Modal content */
.modal-content {
    max-height: 80vh;
    overflow-y: auto;
    background: var(--c-surface);
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}
.modal-sm { width: 400px; }
.modal-450 { width: 450px; }
.modal-md { width: 500px; }
.modal-550 { width: 550px; }
.modal-lg { width: 600px; }

/* Transitions */
.transition-bg { transition: background 0.15s; }

/* Progress bar */
.progress-bar {
    height: 8px;
    background: var(--c-border);
    border-radius: var(--radius-sm);
    overflow: hidden;
}
.progress-fill {
    height: 100%;
    border-radius: var(--radius-sm);
}

/* Control panel layout */
.control-stage-layout {
    display: flex;
    height: calc(100vh - 180px);
    align-items: stretch;
    border: var(--border-width) solid var(--c-border);
    border-radius: var(--radius-md);
    overflow: hidden;
}
.control-panel {
    width: 280px;
    min-width: 280px;
    background: var(--c-surface);
    border-right: var(--border-width) solid var(--c-border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}
.stage-panel {
    flex: 1;
    position: relative;
    overflow-y: auto;
    background: var(--c-bg);
    padding: var(--space-4);
}

/* QR code holder */
.qr-holder {
    background: white;
    padding: var(--space-2);
    border-radius: var(--radius-sm);
    border: var(--border-width) solid var(--c-border);
}

/* Min widths */
.min-w-20 { min-width: 80px; }
.min-w-22 { min-width: 90px; }
.min-w-24 { min-width: 96px; }
.min-w-25 { min-width: 100px; }
.min-w-36 { min-width: 144px; }
.min-w-35 { min-width: 140px; }

/* Primary light background */
.bg-primary-light { background: var(--c-primary-100); }

/* Radio button style */
.radio-indicator {
    width: 16px;
    height: 16px;
    border: 2px solid var(--c-border);
    border-radius: 50%;
    display: inline-block;
    flex-shrink: 0;
}

/* Text colors */
.text-primary { color: var(--c-primary); }
.text-danger { color: var(--c-danger); }

/* Cursor */
.cursor-pointer { cursor: pointer; }

/* Additional flex utilities */
.items-start { align-items: flex-start; }
.justify-center { justify-content: center; }
.flex-shrink-0 { flex-shrink: 0; }

/* Position utilities */
.fixed { position: fixed; }
.inset-0 { top: 0; left: 0; right: 0; bottom: 0; }
.z-1000 { z-index: 1000; }

/* Size utilities */
.w-16 { width: 16px; }
.h-full { height: 100%; }
.max-h-80vh { max-height: 80vh; }
.max-h-90vh { max-height: 90vh; }
.max-h-300 { max-height: 300px; }

/* Font weight */
.font-semibold { font-weight: 600; }
.font-medium { font-weight: 500; }

/* Form elements */
.resize-y { resize: vertical; }
.min-h-80 { min-height: 80px; }
.min-h-60 { min-height: 60px; }

/* Icon containers */
.icon-sm { width: 16px; display: inline-block; }
.icon-20 { width: 20px; display: inline-block; }

/* Control panel widths */
.control-panel-350 { width: 350px; min-width: 350px; }

/* Chart container */
.chart-container {
    width: 100%;
    height: 350px;
    border: var(--border-width) solid var(--c-border);
    border-radius: var(--radius-md);
}

/* Accent bar for list items */
.accent-bar {
    width: 4px;
    height: 40px;
    border-radius: 2px;
}

/* Status badge base */
.status-badge {
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-sm);
    font-size: var(--text-xs);
    font-weight: 500;
}

/* Info highlight */
.info-highlight {
    background: var(--c-bg);
}

/* Selected state highlight */
.selected-highlight {
    background: var(--c-primary-100);
    border-radius: var(--radius-sm);
    padding-left: var(--space-1);
}

/* Modal header/footer borders */
.modal-header {
    border-bottom: var(--border-width) solid var(--c-border);
}
.modal-footer {
    border-top: var(--border-width) solid var(--c-border);
}

/* Modal size xl */
.modal-xl { width: 600px; max-height: 90vh; }

/* Padding specific */
.py-3 { padding-top: var(--space-3); padding-bottom: var(--space-3); }
.px-2 { padding-left: var(--space-2); padding-right: var(--space-2); }
.px-3 { padding-left: var(--space-3); padding-right: var(--space-3); }
.px-4 { padding-left: var(--space-4); padding-right: var(--space-4); }
.pl-2 { padding-left: var(--space-2); }
.pl-3 { padding-left: var(--space-3); }
.pl-4 { padding-left: var(--space-4); }
.pr-3 { padding-right: var(--space-3); }

/* Margin top */
.mt-1 { margin-top: var(--space-1); }

/* Select dropdown width */
.select-w-200 { width: 200px; }

/* Alert badge position */
.alert-badge-pos {
    top: -6px;
    right: -8px;
}
.hidden { display: none; }

/* Button sizes */
.btn-sm {
    padding: var(--space-1) var(--space-2);
    font-size: var(--text-xs);
}

/* Output panel */
.output {
    height: 400px;
    overflow-y: auto;
    padding: var(--space-4);
    background: hsl(var(--hp-hue-seed-1), 10%, 12%);
    color: hsl(var(--hp-hue-seed-1), 5%, 90%);
    border-radius: var(--radius-md);
    font-family: var(--font-family-pri);
    font-size: var(--text-sm);
    white-space: pre-wrap;
    word-break: break-all;
}
/* Leaflet custom marker overrides */
.leaflet-div-icon-custom {
    background: transparent !important;
    border: none !important;
}
.custom-marker {
    background: transparent;
    border: none;
}

/* --- Modals --- */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(2px);
}

.modal {
    background: var(--c-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    min-width: 400px;
    max-width: 90vw;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    border: var(--border-width) solid var(--c-border);
}

.modal h3 {
    margin: 0 0 var(--space-4) 0;
    font-size: var(--text-lg);
    font-weight: 600;
}

/* --- Forms --- */
.form-group {
    margin-bottom: var(--space-4);
}

.form-group label {
    display: block;
    font-size: var(--text-sm);
    font-weight: 500;
    margin-bottom: var(--space-1);
    color: var(--c-text-main);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--space-2) var(--space-3);
    border: var(--border-width) solid var(--c-border);
    border-radius: var(--radius-sm);
    background: var(--c-bg);
    color: var(--c-text-main);
    font-size: var(--text-sm);
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--c-primary);
    box-shadow: 0 0 0 3px hsl(var(--c-primary-h), var(--c-primary-s), 90%);
}

.form-group input[type="checkbox"] {
    width: auto;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-2);
    margin-top: var(--space-4);
    padding-top: var(--space-4);
    border-top: 1px solid var(--c-border);
}

/* ═══════════════════════════════════════════════════════════════════════════ */
/*                              DARK MODE                                       */
/* ═══════════════════════════════════════════════════════════════════════════ */
/* Activate with: <html data-theme="dark"> or class="dark" on any container */

[data-theme="dark"],
.dark {
    /* Invert the semantic color mappings */
    --c-bg: var(--c-neutral-950);
    --c-surface: var(--c-neutral-900);
    --c-surface-raised: var(--c-neutral-800);
    --c-surface-sunken: var(--c-neutral-950);

    /* Borders - lighter in dark mode */
    --c-border: var(--c-neutral-700);
    --c-border-strong: var(--c-neutral-600);
    --c-border-subtle: var(--c-neutral-800);

    /* Text - invert for dark backgrounds */
    --c-text-main: var(--c-neutral-100);
    --c-text-muted: var(--c-neutral-400);
    --c-text-subtle: var(--c-neutral-500);
    --c-text-light: var(--c-neutral-900);

    /* Primary colors - slightly boost lightness for dark bg */
    --c-primary: var(--c-primary-400);
    --c-primary-hover: var(--c-primary-300);
    --c-primary-active: var(--c-primary-500);
    --c-primary-bg: hsl(var(--c-primary-h), calc(var(--c-primary-s) * 0.3), 15%);
    --c-primary-ring: hsl(var(--c-primary-h), var(--c-primary-s), 25%);

    /* Secondary colors */
    --c-secondary: var(--c-secondary-400);
    --c-secondary-hover: var(--c-secondary-300);
    --c-secondary-active: var(--c-secondary-500);

    /* Status colors - adjust for dark mode visibility */
    --c-success: var(--c-success-500);
    --c-success-bg: hsl(var(--c-success-h), calc(var(--c-success-s) * 0.3), 15%);
    --c-success-text: var(--c-success-100);

    --c-warning: var(--c-warning-500);
    --c-warning-bg: hsl(var(--c-warning-h), calc(var(--c-warning-s) * 0.3), 15%);
    --c-warning-text: var(--c-warning-100);

    --c-danger: var(--c-danger-500);
    --c-danger-bg: hsl(var(--c-danger-h), calc(var(--c-danger-s) * 0.3), 15%);
    --c-danger-text: var(--c-danger-100);

    --c-info: var(--c-info-500);
    --c-info-bg: hsl(var(--c-info-h), calc(var(--c-info-s) * 0.3), 15%);
    --c-info-text: var(--c-info-100);

    /* Shadows - more subtle in dark mode, use darker color */
    --hp-shadow-intensity: 0.4;
    --shadow-sm:
        0 1px calc(2px * var(--hp-shadow-blur)) 0 hsla(0, 0%, 0%, var(--hp-shadow-intensity)),
        0 2px calc(4px * var(--hp-shadow-blur)) 0 hsla(0, 0%, 0%, calc(var(--hp-shadow-intensity) * 0.5));
    --shadow-md:
        0 2px calc(4px * var(--hp-shadow-blur)) 0 hsla(0, 0%, 0%, var(--hp-shadow-intensity)),
        0 4px calc(8px * var(--hp-shadow-blur)) 0 hsla(0, 0%, 0%, calc(var(--hp-shadow-intensity) * 0.7));
    --shadow-lg:
        0 4px calc(8px * var(--hp-shadow-blur)) 0 hsla(0, 0%, 0%, var(--hp-shadow-intensity)),
        0 8px calc(16px * var(--hp-shadow-blur)) 0 hsla(0, 0%, 0%, calc(var(--hp-shadow-intensity) * 0.8));
    --shadow-hover:
        0 var(--hover-shadow-lift) var(--hover-shadow-spread) 0 hsla(0, 0%, 0%, var(--hover-shadow-opacity)),
        0 calc(var(--hover-shadow-lift) * 2) calc(var(--hover-shadow-spread) * 2) 0 hsla(0, 0%, 0%, calc(var(--hover-shadow-opacity) * 0.5));

    /* Gradients for dark mode */
    --c-primary-gradient: linear-gradient(135deg, var(--c-primary-500) 0%, var(--c-primary-400) 100%);
    --c-secondary-gradient: linear-gradient(135deg, var(--c-secondary-500) 0%, var(--c-secondary-400) 100%);
}

/* Dark mode button adjustments */
[data-theme="dark"] .btn-pri,
.dark .btn-pri {
    background-color: var(--c-primary-500);
    border-color: var(--c-primary-400);
    color: var(--c-neutral-950);
}

[data-theme="dark"] .btn-pri:hover,
.dark .btn-pri:hover {
    background-color: var(--c-primary-400);
    border-color: var(--c-primary-300);
}

[data-theme="dark"] .btn-sec,
.dark .btn-sec {
    background-color: var(--c-neutral-800);
    border-color: var(--c-neutral-600);
    color: var(--c-neutral-100);
}

[data-theme="dark"] .btn-sec:hover,
.dark .btn-sec:hover {
    background-color: var(--c-neutral-700);
    border-color: var(--c-neutral-500);
}

[data-theme="dark"] .btn-ghost:hover,
.dark .btn-ghost:hover {
    background-color: var(--c-neutral-800);
}

/* Dark mode input adjustments */
[data-theme="dark"] .input,
.dark .input {
    background-color: var(--c-neutral-900);
    border-color: var(--c-neutral-700);
    color: var(--c-neutral-100);
}

[data-theme="dark"] .input:focus,
.dark .input:focus {
    border-color: var(--c-primary-500);
    box-shadow: 0 0 0 3px var(--c-primary-ring);
}

/* --- Tabs --- */
.tabs {
    width: 100%;
}

.tabs-header {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    border-bottom: var(--border-width) solid var(--c-border);
    margin-bottom: var(--space-4);
    gap: var(--space-1);
}

.tab-btn {
    padding: var(--space-2) var(--space-4);
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--c-text-muted);
    font-weight: 500;
    font-size: var(--text-sm);
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
    bottom: -1px;
}

.tab-btn:hover {
    color: var(--c-primary-600);
    background-color: var(--c-primary-50);
}

.tab-btn.active {
    color: var(--c-primary-600);
    border-bottom-color: var(--c-primary-500);
}

.tabs-content {
    padding: var(--space-2) 0;
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
}

/* Tabs variants */
.tabs-pills .tabs-header {
    border-bottom: none;
    gap: var(--space-2);
}

.tabs-pills .tab-btn {
    border-radius: var(--radius-md);
    border-bottom: none;
    bottom: 0;
}

.tabs-pills .tab-btn.active {
    background-color: var(--c-primary-100);
    color: var(--c-primary-700);
}

.tabs-boxed .tabs-header {
    background-color: var(--c-neutral-100);
    padding: var(--space-1);
    border-radius: var(--radius-md);
    border-bottom: none;
}

.tabs-boxed .tab-btn {
    border-radius: var(--radius-sm);
    border-bottom: none;
    bottom: 0;
}

.tabs-boxed .tab-btn.active {
    background-color: var(--c-surface);
    color: var(--c-text-main);
    box-shadow: var(--shadow-sm);
}

/* --- Accordion --- */
.accordion {
    border: var(--border-width) solid var(--c-border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.accordion-item {
    border-bottom: var(--border-width) solid var(--c-border);
}

.accordion-item:last-child {
    border-bottom: none;
}

.accordion-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-3) var(--space-4);
    cursor: pointer;
    font-weight: 600;
    background-color: var(--c-surface);
    color: var(--c-text-main);
    transition: background-color 0.2s;
}

.accordion-header:hover {
    background-color: var(--c-primary-50);
}

.accordion-header.active {
    background-color: var(--c-primary-100);
    color: var(--c-primary-700);
}

.accordion-icon {
    font-size: var(--text-sm);
    color: var(--c-text-muted);
    transition: transform 0.3s;
}

.accordion-header.active .accordion-icon {
    transform: rotate(180deg);
}

.accordion-body {
    display: none;
    overflow: hidden;
}

.accordion-content {
    padding: var(--space-4);
    color: var(--c-text-muted);
    background-color: var(--c-surface);
    border-top: var(--border-width) solid var(--c-border-subtle);
}

/* Accordion flush variant (no outer border) */
.accordion-flush {
    border: none;
    border-radius: 0;
}

.accordion-flush .accordion-item {
    border-radius: 0;
}

.accordion-flush .accordion-header {
    background-color: transparent;
    padding-left: 0;
    padding-right: 0;
}

.accordion-flush .accordion-content {
    padding-left: 0;
    padding-right: 0;
    background-color: transparent;
    border-top: none;
}

/* --- Modal --- */
.modal-overlay {
    background-color: hsla(var(--c-neutral-h), var(--c-neutral-s), 10%, 0.6);
}

/* === Icon System === */

/* Base icon styling */
.icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1em;
    height: 1em;
    vertical-align: middle;
    line-height: 1;
}

.icon svg {
    width: 100%;
    height: 100%;
    overflow: visible;
}

/* Default path styling */
.icon svg path {
    fill: none;
    stroke: currentColor;
    stroke-width: 1.5;
    stroke-linecap: round;
    stroke-linejoin: round;
}

/* Primary shape - main filled shape */
.icon svg .icon-primary {
    fill: none;
    stroke: none;
}

/* Secondary shape - accent filled shape */
.icon svg .icon-secondary {
    fill: none;
    stroke: none;
}

/* Outline path - stroked */
.icon svg .icon-outline {
    fill: none;
    stroke: currentColor;
}

/* === TONE VARIANTS === */

/* Mono - outline only, no fills */
.icon-mono svg .icon-primary { fill: none; }
.icon-mono svg .icon-secondary { fill: none; }
.icon-mono svg .icon-outline { stroke: currentColor; }

/* 2-Tone - primary and secondary shapes with different fills */
.icon-2tone svg .icon-primary {
    fill: var(--icon-color-pri, var(--c-primary-500));
}
.icon-2tone svg .icon-secondary {
    fill: var(--icon-color-sec, var(--c-primary-200));
}
.icon-2tone svg .icon-outline {
    stroke: var(--icon-color-outline, currentColor);
}

/* Primary color options */
.icon-pri-500 { --icon-color-pri: var(--c-primary-500); }
.icon-pri-400 { --icon-color-pri: var(--c-primary-400); }
.icon-pri-600 { --icon-color-pri: var(--c-primary-600); }
.icon-pri-700 { --icon-color-pri: var(--c-primary-700); }
.icon-pri-secondary { --icon-color-pri: var(--c-secondary-500); }
.icon-pri-neutral { --icon-color-pri: var(--c-neutral-500); }
.icon-pri-dark { --icon-color-pri: var(--c-neutral-700); }

/* Secondary color options */
.icon-sec-100 { --icon-color-sec: var(--c-primary-100); }
.icon-sec-200 { --icon-color-sec: var(--c-primary-200); }
.icon-sec-300 { --icon-color-sec: var(--c-primary-300); }
.icon-sec-secondary { --icon-color-sec: var(--c-secondary-200); }
.icon-sec-neutral { --icon-color-sec: var(--c-neutral-200); }
.icon-sec-white { --icon-color-sec: white; }
.icon-sec-none { --icon-color-sec: transparent; }

/* === STROKE COLOR OPTIONS === */

/* Primary shades */
.icon-stroke-pri svg .icon-stroke { stroke: var(--c-primary-500); }
.icon-stroke-pri-dark svg .icon-stroke { stroke: var(--c-primary-700); }
.icon-stroke-pri-light svg .icon-stroke { stroke: var(--c-primary-400); }

/* Neutral/black shades */
.icon-stroke-dark svg .icon-stroke { stroke: var(--c-neutral-800); }
.icon-stroke-medium svg .icon-stroke { stroke: var(--c-neutral-500); }
.icon-stroke-light svg .icon-stroke { stroke: var(--c-neutral-400); }

/* White (for dark backgrounds) */
.icon-stroke-white svg .icon-stroke { stroke: white; }
.icon-stroke-white svg .icon-fill { fill: rgba(255,255,255,0.2); stroke: rgba(255,255,255,0.3); }

/* === FILL COLOR OPTIONS === */
.icon-fill-pri svg .icon-fill { fill: var(--c-primary-200); }
.icon-fill-sec svg .icon-fill { fill: var(--c-secondary-200); }
.icon-fill-neutral svg .icon-fill { fill: var(--c-neutral-200); }
.icon-fill-none svg .icon-fill { fill: none; stroke: none; }

/* Stroke weights */
.icon-hairline svg path { stroke-width: 0.5; }
.icon-thin svg path { stroke-width: 1; }
.icon-regular svg path { stroke-width: 1.5; }
.icon-bold svg path { stroke-width: 2; }
.icon-heavy svg path { stroke-width: 2.5; }
.icon-no-stroke svg path { stroke: none !important; }

/* Line styles */
.icon-rounded svg {
    stroke-linecap: round;
    stroke-linejoin: round;
}

.icon-square svg {
    stroke-linecap: square;
    stroke-linejoin: miter;
}

/* Effects */
.icon-shadow svg {
    filter: drop-shadow(1px 1px 1px var(--c-neutral-400));
}

.icon-glow svg {
    filter: drop-shadow(0 0 3px var(--c-primary-400));
}

/* Sizes */
.icon-xs { font-size: 0.75rem; }
.icon-sm { font-size: 1rem; }
.icon-md { font-size: 1.5rem; }
.icon-lg { font-size: 2rem; }
.icon-xl { font-size: 3rem; }
.icon-2xl { font-size: 4rem; }

/* Color overrides for status contexts */
.icon-success svg { stroke: var(--c-success-600); }
.icon-success.icon-2tone svg { stroke: var(--c-success-600); fill: var(--c-success-100); }

.icon-warning svg { stroke: var(--c-warning-600); }
.icon-warning.icon-2tone svg { stroke: var(--c-warning-600); fill: var(--c-warning-100); }

.icon-danger svg { stroke: var(--c-danger-600); }
.icon-danger.icon-2tone svg { stroke: var(--c-danger-600); fill: var(--c-danger-100); }

.icon-info svg { stroke: var(--c-info-600); }
.icon-info.icon-2tone svg { stroke: var(--c-info-600); fill: var(--c-info-100); }

/* Interactive states */
.icon-interactive {
    cursor: pointer;
    transition: transform 0.15s, filter 0.15s;
}

.icon-interactive:hover {
    transform: scale(1.1);
}

.icon-interactive:hover.icon-glow svg {
    filter: drop-shadow(0 0 5px var(--c-primary-400));
}

/* Auto dark mode based on system preference */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --c-bg: hsl(var(--c-primary-h), var(--c-neutral-s), 8%);
        --c-surface: hsl(var(--c-primary-h), var(--c-neutral-s), 12%);
        --c-surface-raised: hsl(var(--c-primary-h), var(--c-neutral-s), 16%);
        --c-border: hsl(var(--c-primary-h), var(--c-neutral-s), 25%);
        --c-border-strong: hsl(var(--c-primary-h), var(--c-neutral-s), 35%);
        --c-text-main: hsl(var(--c-primary-h), var(--c-neutral-s), 95%);
        --c-text-muted: hsl(var(--c-primary-h), var(--c-neutral-s), 60%);
    }
}

/* ═══════════════════════════════════════════════════════════════════════════ */
/*                           APP SHELL LAYOUT                                   */
/* ═══════════════════════════════════════════════════════════════════════════ */

.app-shell {
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
}

.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 56px;
    padding: 0 var(--space-4);
    background: var(--c-surface);
    border-bottom: var(--border-width) solid var(--c-border);
    flex-shrink: 0;
}

.app-brand {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.app-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--c-primary);
    color: white;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: var(--text-sm);
}

.app-title {
    font-weight: 600;
    font-size: var(--text-lg);
}

.app-module-name {
    color: var(--c-text-muted);
    font-size: var(--text-sm);
}

.app-user {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.app-body {
    display: flex;
    flex: 1;
    overflow: hidden;
}

.app-sidebar {
    width: 240px;
    min-width: 240px;
    background: var(--c-surface);
    border-right: var(--border-width) solid var(--c-border);
    overflow-y: auto;
    flex-shrink: 0;
}

.app-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-6);
    background: var(--c-bg);
}

/* Sidebar modules */
.sidebar-module {
    border-bottom: var(--border-width) solid var(--c-border);
}

.sidebar-module-header {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    cursor: pointer;
    transition: background 0.15s ease;
}

.sidebar-module-header:hover {
    background: var(--c-bg);
}

.sidebar-module.active .sidebar-module-header {
    background: var(--c-primary-100);
    color: var(--c-primary-700);
    font-weight: 500;
}

.sidebar-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: var(--c-border);
    border-radius: var(--radius-sm);
    font-size: var(--text-xs);
    font-weight: 600;
}

.sidebar-module.active .sidebar-icon {
    background: var(--c-primary);
    color: white;
}

.sidebar-label {
    font-size: var(--text-sm);
}

.sidebar-views {
    background: var(--c-bg);
    padding: var(--space-1) 0;
}

.sidebar-view {
    padding: var(--space-2) var(--space-4);
    padding-left: calc(var(--space-4) + 32px);
    font-size: var(--text-sm);
    color: var(--c-text-muted);
    cursor: pointer;
    transition: all 0.15s ease;
}

.sidebar-view:hover {
    background: var(--c-surface);
    color: var(--c-text-main);
}

.sidebar-view.active {
    background: var(--c-surface);
    color: var(--c-primary);
    font-weight: 500;
}

/* Page titles */
.page-title {
    font-size: var(--text-2xl);
    font-weight: 600;
    margin-bottom: var(--space-6);
}

.section-title {
    font-size: var(--text-lg);
    font-weight: 500;
    margin-top: var(--space-6);
    margin-bottom: var(--space-4);
}

/* Stats row */
.stats-row {
    display: flex;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
    flex-wrap: wrap;
}

.stats-row .stat-card {
    flex: 1;
    min-width: 150px;
}

/* Module tiles */
.module-tiles {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--space-4);
}

.module-tile {
    background: var(--c-surface);
    border: var(--border-width) solid var(--c-border);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    cursor: pointer;
    transition: all 0.2s ease;
}

.module-tile:hover {
    border-color: var(--c-primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.tile-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: var(--c-primary);
    color: white;
    border-radius: var(--radius-md);
    font-size: var(--text-xl);
    font-weight: 600;
    margin-bottom: var(--space-3);
}

.tile-name {
    font-weight: 500;
    margin-bottom: var(--space-1);
}

.tile-desc {
    font-size: var(--text-xs);
    color: var(--c-text-muted);
    line-height: 1.4;
}

/* Cards grid */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-4);
}

.course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--space-4);
}

.charts-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--space-4);
    margin-top: var(--space-6);
}

/* Data tables */
.data-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--c-surface);
    border: var(--border-width) solid var(--c-border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.data-table th,
.data-table td {
    padding: var(--space-3) var(--space-4);
    text-align: left;
    border-bottom: var(--border-width) solid var(--c-border);
}

.data-table th {
    background: var(--c-bg);
    font-weight: 500;
    font-size: var(--text-sm);
    color: var(--c-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.data-table tbody tr:hover {
    background: var(--c-bg);
}

.data-table tbody tr:last-child td {
    border-bottom: none;
}

/* Status variants */
.status-success {
    background: var(--c-success-100);
    color: var(--c-success-700);
}

.status-warning {
    background: var(--c-warning-100);
    color: var(--c-warning-700);
}

.status-danger {
    background: var(--c-danger-100);
    color: var(--c-danger-700);
}

.status-info {
    background: var(--c-info-100);
    color: var(--c-info-700);
}

/* Controls bar */
.controls-bar {
    display: flex;
    align-items: flex-end;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

.actions-bar {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
    padding: var(--space-3);
    background: var(--c-surface);
    border: var(--border-width) solid var(--c-border);
    border-radius: var(--radius-md);
}

/* Chart placeholder */
.chart-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 300px;
    background: var(--c-bg);
    border: 2px dashed var(--c-border);
    border-radius: var(--radius-md);
    color: var(--c-text-muted);
    font-style: italic;
}

/* -------------------------------------------------------------------------- */
/*                           RESPONSIVE DESIGN                                */
/* -------------------------------------------------------------------------- */

/* ═══════════════════════════════════════════════════════════════════════════ */
/*                          MOBILE FIRST (up to 480px)                         */
/* ═══════════════════════════════════════════════════════════════════════════ */
@media (max-width: 480px) {
    /* Typography - Scale down headings significantly on mobile */
    :root {
        --hp-scale: 0.9; /* Overall scale reduction */
        --hp-density: 0.85; /* Tighter spacing on mobile */
    }

    h1 { font-size: var(--text-3xl); }
    h2 { font-size: var(--text-2xl); }
    h3 { font-size: var(--text-xl); }
    h4 { font-size: var(--text-lg); }

    /* Buttons - Full width and adjusted padding */
    .btn {
        width: 100%;
        justify-content: center;
    }

    .btn-group {
        flex-direction: column;
        gap: var(--space-2);
    }

    .btn-group .btn {
        width: 100%;
    }

    /* Cards - Reduce padding and adjust layout */
    .card {
        padding: var(--space-3);
        border-radius: var(--radius-sm);
        box-shadow: var(--shadow-sm);
    }

    .cards-grid {
        grid-template-columns: 1fr;
        gap: var(--space-3);
    }

    /* Tables - Horizontal scroll wrapper */
    .table-wrapper {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .table {
        min-width: 600px; /* Ensure table doesn't collapse */
    }

    .table-cell,
    .table-header-cell {
        padding: var(--space-2) var(--space-2);
        font-size: var(--text-sm);
    }

    /* Modals - Full screen on mobile */
    .modal-content,
    .modal {
        width: 100vw !important;
        max-width: 100vw;
        min-height: 100vh;
        margin: 0;
        border-radius: 0;
    }

    .modal-sm,
    .modal-md,
    .modal-lg,
    .modal-xl,
    .modal-450,
    .modal-550 {
        width: 100vw !important;
        max-width: 100vw;
        min-height: 100vh;
        margin: 0;
        border-radius: 0;
    }

    /* Forms - Full width inputs */
    .form-group input,
    .form-group select,
    .form-group textarea {
        font-size: 16px; /* Prevents iOS zoom on focus */
    }

    .form-actions {
        flex-direction: column;
        gap: var(--space-2);
    }

    .form-actions .btn {
        width: 100%;
    }

    /* Flex layouts - Stack on mobile */
    .flex-mobile-col {
        flex-direction: column;
    }

    /* Spacing adjustments */
    .p-4 { padding: var(--space-3); }
    .p-6 { padding: var(--space-4); }
    .gap-4 { gap: var(--space-3); }

    /* Navigation - Touch friendly */
    .sidebar-link,
    .nav-item {
        min-height: 44px; /* Apple's touch target recommendation */
        padding: var(--space-3) var(--space-4);
    }

    .app-sidebar {
        display: none; /* Hide by default, show via toggle */
    }

    .module-tiles {
        grid-template-columns: 1fr;
    }

    /* Control panels - Full width on mobile */
    .controls {
        position: static;
        width: 100%;
        margin-bottom: var(--space-4);
        box-shadow: none;
        border: 1px solid var(--c-border);
    }

    /* Stats - Stack vertically */
    .stats-row {
        flex-direction: column;
        gap: var(--space-2);
    }
}

/* ═══════════════════════════════════════════════════════════════════════════ */
/*                      TABLET (481px to 768px)                                */
/* ═══════════════════════════════════════════════════════════════════════════ */
@media (min-width: 481px) and (max-width: 768px) {
    :root {
        --hp-scale: 0.95;
        --hp-density: 0.9;
    }

    h1 { font-size: var(--text-3xl); }
    h2 { font-size: var(--text-2xl); }

    /* Cards - 2 columns on tablet */
    .cards-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    /* Modals - 90% width on tablet */
    .modal-content,
    .modal {
        width: 90vw;
        max-width: 600px;
    }

    .modal-lg,
    .modal-xl {
        width: 90vw;
        max-width: 700px;
    }

    /* Tables - Adjust padding */
    .table-cell,
    .table-header-cell {
        padding: var(--space-2) var(--space-3);
    }

    /* Module tiles - 2 columns */
    .module-tiles {
        grid-template-columns: repeat(2, 1fr);
    }

    /* Sidebar - Collapsible */
    .app-sidebar {
        display: none;
    }

    .controls {
        position: static;
        width: 100%;
        margin-bottom: var(--space-4);
        box-shadow: none;
        border: 1px solid var(--c-border);
    }
}

/* ═══════════════════════════════════════════════════════════════════════════ */
/*                     DESKTOP (769px to 1024px)                               */
/* ═══════════════════════════════════════════════════════════════════════════ */
@media (min-width: 769px) and (max-width: 1024px) {
    :root {
        --hp-scale: 0.98;
    }

    /* Cards - 3 columns on smaller desktop */
    .cards-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }

    /* Module tiles - 3 columns */
    .module-tiles {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ═══════════════════════════════════════════════════════════════════════════ */
/*                        LARGE DESKTOP (1025px+)                              */
/* ═══════════════════════════════════════════════════════════════════════════ */
@media (min-width: 1025px) {
    /* Cards - 4 columns on large screens */
    .cards-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }

    /* Module tiles - 4 columns */
    .module-tiles {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* ═══════════════════════════════════════════════════════════════════════════ */
/*                       RESPONSIVE UTILITY CLASSES                            */
/* ═══════════════════════════════════════════════════════════════════════════ */

/* Hide/Show utilities */
.hide-mobile { display: block; }
.show-mobile { display: none; }

@media (max-width: 768px) {
    .hide-mobile { display: none; }
    .show-mobile { display: block; }
}

/* Flex direction utilities */
.flex-col-mobile { flex-direction: row; }

@media (max-width: 768px) {
    .flex-col-mobile { flex-direction: column; }
}

/* Text alignment utilities */
.text-center-mobile { text-align: left; }

@media (max-width: 768px) {
    .text-center-mobile { text-align: center; }
}

/* Width utilities */
.w-full-mobile { width: auto; }

@media (max-width: 768px) {
    .w-full-mobile { width: 100%; }
}

/* ═══════════════════════════════════════════════════════════════════════════ */
/*                       TOUCH DEVICE OPTIMIZATIONS                            */
/* ═══════════════════════════════════════════════════════════════════════════ */
@media (hover: none) and (pointer: coarse) {
    /* Larger touch targets for touch devices */
    .btn,
    .sidebar-link,
    .nav-item,
    a {
        min-height: 44px;
        min-width: 44px;
    }

    /* Remove hover effects on touch devices */
    .btn:hover,
    .card-interactive:hover,
    .table-row:hover {
        transform: none;
    }

    /* Increase form input sizes */
    .form-group input,
    .form-group select,
    .form-group textarea {
        min-height: 44px;
        font-size: 16px; /* Prevents zoom on iOS */
    }
}

/* ═══════════════════════════════════════════════════════════════════════════ */
/*                          LANDSCAPE MOBILE                                   */
/* ═══════════════════════════════════════════════════════════════════════════ */
@media (max-width: 768px) and (orientation: landscape) {
    /* Reduce vertical spacing in landscape */
    :root {
        --hp-density: 0.8;
    }

    /* Modals take less vertical space */
    .modal-content,
    .modal {
        max-height: 95vh;
        overflow-y: auto;
    }
}

/* ═══════════════════════════════════════════════════════════════════════════ */
/*                       PRINT STYLES                                          */
/* ═══════════════════════════════════════════════════════════════════════════ */
@media print {
    /* Hide non-essential elements */
    .sidebar,
    .app-sidebar,
    .nav,
    .btn,
    .controls,
    .modal-overlay {
        display: none !important;
    }

    /* Optimize for printing */
    body {
        background: white;
        color: black;
    }

    .card {
        box-shadow: none;
        border: 1px solid #ccc;
        page-break-inside: avoid;
    }

    /* Ensure readable text */
    * {
        color: black !important;
        background: white !important;
    }
}