:root {
    /* SkillDrive Design System — Light Theme
       Brand: High-Contrast Kinetic Modern
       Primary: Neon Lime | Structural: Deep Slate | Accent: Bright Purple */

    /* Primary — Neon Lime (Action / Energy) */
    --md-sys-color-primary: #B6FF00;
    --md-sys-color-primary-rgb: 182, 255, 0;
    --md-sys-color-on-primary: #242834;
    --md-sys-color-primary-container: rgba(182, 255, 0, 0.12);
    --md-sys-color-on-primary-container: #242834;

    /* Secondary — Bright Purple (Intelligence / Accent) */
    --md-sys-color-secondary: #7D53FF;
    --md-sys-color-on-secondary: #FFFFFF;
    --md-sys-color-secondary-container: rgba(125, 83, 255, 0.12);
    --md-sys-color-on-secondary-container: #7D53FF;

    /* Tertiary — Deep Slate (Structural / Authority) */
    --md-sys-color-tertiary: #242834;
    --md-sys-color-on-tertiary: #FFFFFF;
    --md-sys-color-tertiary-container: #242834;
    --md-sys-color-on-tertiary-container: #8b8f9e;

    /* Error */
    --md-sys-color-error: #BA1A1A;
    --md-sys-color-on-error: #FFFFFF;
    --md-sys-color-error-container: #FFDAD6;
    --md-sys-color-on-error-container: #93000A;

    /* Background & Surface — Clean White Foundation */
    --md-sys-color-background: #FFFFFF;
    --md-sys-color-on-background: #1c1b1c;
    --md-sys-color-surface: #fcf8f9;
    --md-sys-color-surface-rgb: 252, 248, 249;
    --md-sys-color-on-surface: #1c1b1c;
    --md-sys-color-surface-variant: #e5e2e3;
    --md-sys-color-on-surface-variant: #46464c;

    /* Surface Containers (DESIGN.md tokens) */
    --md-sys-color-surface-container-lowest: #ffffff;
    --md-sys-color-surface-container-low: #f6f3f4;
    --md-sys-color-surface-container: #f0edee;
    --md-sys-color-surface-container-high: #ebe7e8;
    --md-sys-color-surface-container-highest: #e5e2e3;

    /* Outline & Scrim */
    --md-sys-color-outline: #76777c;
    --md-sys-color-outline-variant: #c6c6cc;
    --md-sys-color-scrim: rgba(0, 0, 0, 0.32);

    /* Typography Fonts — Inter exclusively (DESIGN.md) */
    --md-sys-typescale-font-family: 'Inter', 'Kantumruy Pro', sans-serif;
    --md-sys-typescale-display-font-family: 'Inter', 'Kantumruy Pro', sans-serif;

    /* Elevation — Tonal Layering + Digital Glow (not muddy shadows) */
    --md-sys-elevation-level-0: none;
    --md-sys-elevation-level-1: 0px 1px 3px rgba(36, 40, 52, 0.06), 0px 1px 2px rgba(36, 40, 52, 0.04);
    --md-sys-elevation-level-2: 0px 4px 16px rgba(36, 40, 52, 0.08), 0px 1px 4px rgba(36, 40, 52, 0.04);

    /* Shape — Consistent 8px medium radius (DESIGN.md) */
    --md-sys-shape-corner-extra-small: 4px;
    --md-sys-shape-corner-small: 8px;
    --md-sys-shape-corner-medium: 8px;
    --md-sys-shape-corner-large: 12px;
    --md-sys-shape-corner-extra-large: 16px;
    --md-sys-shape-corner-full: 9999px;

    /* SkillDrive custom tokens */
    --sd-neon-lime: #B6FF00;
    --sd-deep-slate: #242834;
    --sd-bright-purple: #7D53FF;
    --sd-surface-alt: #F4F5F7;
    --sd-border: rgba(36, 40, 52, 0.10);
    --sd-glow-lime: 0 0 20px rgba(182, 255, 0, 0.15);
    --sd-glow-purple: 0 0 20px rgba(125, 83, 255, 0.15);
}


/* ========================================
   DARK THEME — SkillDrive Design System
   Neon Lime primary, Purple accent, Deep Slate surfaces
   ======================================== */
[data-theme="dark"] {
    /* Primary — Neon Lime (stays vibrant in dark) */
    --md-sys-color-primary: #B6FF00;
    --md-sys-color-primary-rgb: 182, 255, 0;
    --md-sys-color-on-primary: #242834;
    --md-sys-color-primary-container: rgba(182, 255, 0, 0.15);
    --md-sys-color-on-primary-container: #B6FF00;

    /* Secondary — Bright Purple */
    --md-sys-color-secondary: #a98aff;
    --md-sys-color-on-secondary: #1a0050;
    --md-sys-color-secondary-container: rgba(125, 83, 255, 0.20);
    --md-sys-color-on-secondary-container: #ccbdff;

    /* Tertiary — Muted Lime */
    --md-sys-color-tertiary: #c3c6d6;
    --md-sys-color-on-tertiary: #171b27;
    --md-sys-color-tertiary-container: #434653;
    --md-sys-color-on-tertiary-container: #dfe2f2;

    /* Error */
    --md-sys-color-error: #FFB4AB;
    --md-sys-color-on-error: #690005;
    --md-sys-color-error-container: #93000A;
    --md-sys-color-on-error-container: #FFDAD6;

    /* Background & Surface — Deep Slate base */
    --md-sys-color-background: #0f141f;
    --md-sys-color-on-background: #e5e2e3;
    --md-sys-color-surface: #0f141f;
    --md-sys-color-surface-rgb: 15, 20, 31;
    --md-sys-color-on-surface: #e5e2e3;
    --md-sys-color-surface-variant: #1a1d27;
    --md-sys-color-on-surface-variant: #c6c6cc;

    /* Surface Containers — Deep Slate layered */
    --md-sys-color-surface-container-lowest: #0a0c12;
    --md-sys-color-surface-container-low: #14161e;
    --md-sys-color-surface-container: #1a1d27;
    --md-sys-color-surface-container-high: #242832;
    --md-sys-color-surface-container-highest: #2e323d;

    /* Outline & Scrim */
    --md-sys-color-outline: #76777c;
    --md-sys-color-outline-variant: #3d4150;
    --md-sys-color-scrim: rgba(0, 0, 0, 0.6);

    /* Elevation — Subtle glow for depth */
    --md-sys-elevation-level-1: 0px 1px 3px rgba(0, 0, 0, 0.4), 0px 1px 2px rgba(0, 0, 0, 0.3);
    --md-sys-elevation-level-2: 0px 4px 16px rgba(0, 0, 0, 0.5), 0px 1px 4px rgba(0, 0, 0, 0.3);

    /* SkillDrive dark overrides */
    --sd-border: rgba(255, 255, 255, 0.08);
    --sd-glow-lime: 0 0 24px rgba(182, 255, 0, 0.20);
    --sd-glow-purple: 0 0 24px rgba(125, 83, 255, 0.20);
}


/* ========================================
   DARK THEME — Component Overrides
   ======================================== */

/* Card Border */
[data-theme="dark"] .card {
    border: 1px solid rgba(255, 255, 255, 0.10);
}



/* Hero Gradient Headline styles are in style.css */


/* ========================================
   DIGITAL GRID ANIMATION
   Hero section animated background
   ======================================== */

/* Hero Section Base (both themes) */
.hero-section {
    position: relative;
    overflow: hidden;
}

.hero-section .container {
    position: relative;
    z-index: 1;
}

/* Digital Grid Container - Hidden by default */
.digital-grid {
    display: none;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

/* Grid Nodes Container - Hidden by default */
.grid-nodes {
    display: none;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.grid-node {
    display: none;
}

/* ========================================
   DARK THEME — Digital Grid (Neon Lime)
   ======================================== */
[data-theme="dark"] .digital-grid {
    display: block;
}

[data-theme="dark"] .digital-grid::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(182, 255, 0, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(182, 255, 0, 0.06) 1px, transparent 1px);
    background-size: 60px 60px;
    animation: gridPulse 4s ease-in-out infinite;
}

[data-theme="dark"] .digital-grid::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 30%, rgba(182, 255, 0, 0.12) 0%, transparent 25%),
        radial-gradient(circle at 80% 70%, rgba(125, 83, 255, 0.10) 0%, transparent 25%),
        radial-gradient(circle at 50% 50%, rgba(182, 255, 0, 0.06) 0%, transparent 40%);
    animation: nodeGlow 6s ease-in-out infinite;
}

/* Grid Node Dots — Neon Lime in Dark Mode */
[data-theme="dark"] .grid-nodes {
    display: block;
}

[data-theme="dark"] .grid-node {
    display: block;
    position: absolute;
    width: 4px;
    height: 4px;
    background: rgba(182, 255, 0, 0.6);
    border-radius: 50%;
    box-shadow: 0 0 8px rgba(182, 255, 0, 0.8);
    animation: nodeBlink 3s ease-in-out infinite;
}

[data-theme="dark"] .grid-node:nth-child(1) {
    top: 15%;
    left: 10%;
    animation-delay: 0s;
}

[data-theme="dark"] .grid-node:nth-child(2) {
    top: 25%;
    left: 85%;
    animation-delay: 0.5s;
}

[data-theme="dark"] .grid-node:nth-child(3) {
    top: 60%;
    left: 20%;
    animation-delay: 1s;
}

[data-theme="dark"] .grid-node:nth-child(4) {
    top: 75%;
    left: 70%;
    animation-delay: 1.5s;
}

[data-theme="dark"] .grid-node:nth-child(5) {
    top: 40%;
    left: 50%;
    animation-delay: 2s;
}

[data-theme="dark"] .grid-node:nth-child(6) {
    top: 85%;
    left: 35%;
    animation-delay: 2.5s;
}


/* ========================================
   ANIMATIONS — Digital Grid
   ======================================== */
@keyframes gridPulse {

    0%,
    100% {
        opacity: 0.5;
    }

    50% {
        opacity: 1;
    }
}

@keyframes nodeGlow {

    0%,
    100% {
        opacity: 0.6;
        transform: scale(1);
    }

    50% {
        opacity: 1;
        transform: scale(1.05);
    }
}

@keyframes nodeBlink {

    0%,
    100% {
        opacity: 0.4;
        transform: scale(1);
    }

    50% {
        opacity: 1;
        transform: scale(1.5);
    }
}