@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ==========================================================================
LINKGPT - PREMIUM AI SAAS STYLESHEET
Architecture: Desktop First
Design Language: Dark Mode, Glassmorphism, OpenAI/Linear/Vercel Vibe
========================================================================== */

/* --------------------------------------------------------------------------
01. DESIGN TOKENS (VARIABLES) - FIXED & EXPANDED
-------------------------------------------------------------------------- */

:root {
    /* Color Palette - Core Dark (Zinc/Neutral base for premium depth) */
    --color-bg-base: #000000;
    --color-bg-elevated: #09090b;
    --color-bg-surface: #121214;
    --color-bg-glass: rgba(255, 255, 255, 0.03);
    --color-bg-glass-hover: rgba(255, 255, 255, 0.08);
    --color-bg-glass-active: rgba(255, 255, 255, 0.12);

    /* Color Palette - Typography */
    --color-text-primary: #fafafa;
    --color-text-secondary: #a1a1aa;
    --color-text-muted: #71717a;
    --color-text-inverse: #000000;

    /* Color Palette - Accents & Brand */
    --color-accent-brand: #3b82f6;
    --color-accent-brand-hover: #2563eb;
    --color-accent-brand-glow: rgba(59, 130, 246, 0.3);

    /* Color Palette - Borders & Dividers */
    --color-border-subtle: rgba(255, 255, 255, 0.06);
    --color-border-default: rgba(255, 255, 255, 0.12);
    --color-border-hover: rgba(255, 255, 255, 0.20);
    --color-border-focus: rgba(59, 130, 246, 0.5);

    /* Gradients - Text & Backgrounds */
    --gradient-primary: linear-gradient(135deg, #ffffff 0%, #a1a1aa 100%);
    --gradient-brand: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    --gradient-glow: conic-gradient(from 180deg at 50% 50%, #2a8af6 0deg, #a853ba 180deg, #e92a67 360deg);
    --gradient-shimmer: linear-gradient(90deg, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, 0.05) 50%, rgba(255, 255, 255, 0) 100%);
    --gradient-surface: linear-gradient(180deg, rgba(255, 255, 255, 0.04) 0%, rgba(255, 255, 255, 0) 100%);

    /* Status Colors (Adjusted for better Dark Mode contrast) */
    --color-red: #f87171;
    --color-yellow: #fbbf24;
    --color-green: #34d399;
    --color-purple: #a78bfa;

    /* Typography System */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
    --tracking-tight: -0.04em;
    --tracking-normal: -0.01em;
    --tracking-wide: 0.05em;
    --leading-tight: 1.2;
    --leading-relaxed: 1.6;

    /* Spacing System (Fixed Syntax Errors) */
    --space-2xs: 0.25rem; /* 4px */
    --space-xs: 0.5rem;   /* 8px */
    --space-sm: 1rem;     /* 16px */
    --space-md: 1.5rem;   /* 24px */
    --space-lg: 2.5rem;   /* 40px */
    --space-xl: 4rem;     /* 64px */
    --space-xxl: 8rem;    /* 128px */
    --space-3xl: 12rem;   /* 192px */

    /* Border Radius (Linear/Vercel sharper style) */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 20px;
    --radius-2xl: 32px;
    --radius-pill: 9999px;

    /* Shadows - Premium Elevation with Inner Rings */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.4), inset 0 1px 0 0 rgba(255, 255, 255, 0.04);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -4px rgba(0, 0, 0, 0.5), inset 0 1px 0 0 rgba(255, 255, 255, 0.05);
    --shadow-premium: 0 0 0 1px rgba(255, 255, 255, 0.08), 0 16px 32px -8px rgba(0, 0, 0, 0.8), inset 0 1px 0 rgba(255, 255, 255, 0.06);
    --shadow-premium-large: 0 0 0 1px rgba(255, 255, 255, 0.08), 0 32px 64px -12px rgba(0, 0, 0, 1), inset 0 1px 0 rgba(255, 255, 255, 0.1);
    --shadow-glow: 0 0 24px rgba(59, 130, 246, 0.25);
    --shadow-glow-strong: 0 0 48px rgba(59, 130, 246, 0.4);

    /* Transitions & Easing (Fluid and Snappy) */
    --ease-linear: cubic-bezier(0, 0, 1, 1);
    --ease-in: cubic-bezier(0.4, 0, 1, 1);
    --ease-out: cubic-bezier(0, 0, 0.2, 1);
    --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-spring: cubic-bezier(0.175, 0.885, 0.32, 1.1);

    --transition-fast: 0.15s var(--ease-out);
    --transition-base: 0.3s var(--ease-in-out);
    --transition-slow: 0.5s var(--ease-in-out);
    --transition-spring: 0.6s var(--ease-spring);

    /* Z-Index Hierarchy */
    --z-negative: -1;
    --z-base: 1;
    --z-elevate: 10;
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-overlay: 900;
    --z-modal: 1000;
    --z-toast: 2000;
}

/* --------------------------------------------------------------------------
02. RESET & BASE
-------------------------------------------------------------------------- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg-base);
    color: var(--color-text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* Prevent Media Layout Breaking */
img, video, svg, iframe {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Background Atmospheric Glow */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100vw;
    height: 100vh;
    background: radial-gradient(circle at 50% -20%, rgba(59, 130, 246, 0.08) 0%, rgba(0, 0, 0, 0) 60%);
    pointer-events: none;
    z-index: var(--z-negative);
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg-base);
}

::-webkit-scrollbar-thumb {
    background: var(--color-border-hover);
    border-radius: var(--radius-pill);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-muted);
}

/* Selection Color */
::selection {
    background-color: rgba(59, 130, 246, 0.3);
    color: var(--color-text-primary);
}

/* Lists and Links Reset */
ul,
ol {
    list-style: none;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

/* --------------------------------------------------------------------------
03. TYPOGRAPHY
-------------------------------------------------------------------------- */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--color-text-primary);
}

.heading-display {
    font-size: 5rem;
    font-weight: 700;
    letter-spacing: -0.04em;
    line-height: 1.1;
    margin-bottom: var(--space-md);
}

.heading-section {
    font-size: 3rem;
    font-weight: 600;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-sm);
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.text-small {
    font-size: 0.875rem;
}

.text-large {
    font-size: 1.125rem;
}

.text-white {
    color: #ffffff;
}

/* --------------------------------------------------------------------------
04. LAYOUT & CONTAINERS
-------------------------------------------------------------------------- */
.container-small {
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.container-medium {
    width: 100%;
    max-width: 1024px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.container-large {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* Spacing Utilities */
.spacing-large {
    padding: var(--space-xxl) 0;
}

.spacing-medium {
    padding: var(--space-xl) 0;
}

.mt-xs { margin-top: var(--space-xs); }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.mb-xs { margin-bottom: var(--space-xs); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mr-xs { margin-right: var(--space-xs); }

/* Grid Systems (No longer collapsing) */
.grid-3-cols {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.grid-4-cols {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-md);
}

.grid-5-cols {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--space-md);
}

/* Explicit Stats Grid Mapping */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    width: 100%;
}

/* Flex Utilities */
.text-center { text-align: center; }

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

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

/* --------------------------------------------------------------------------
05. COMPONENTS
-------------------------------------------------------------------------- */

/* Badges */
.feature-badges {
    margin-bottom: var(--space-md);
}

.badge-premium,
.glass-pill {
    display: inline-flex;
    align-items: center;
    padding: 6px 16px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    background: var(--color-bg-glass);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-pill);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: var(--shadow-sm);
    transition: border-color var(--transition-base), color var(--transition-base);
}

.badge-premium:hover,
.glass-pill:hover {
    border-color: var(--color-border-hover);
    color: var(--color-text-primary);
}

.badge-absolute {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-brand);
    color: #fff;
    padding: 4px 12px;
    border-radius: var(--radius-pill);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
}

/* Buttons */
.btn-primary,
.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-size: 0.9375rem;
    font-weight: 500;
    transition: all var(--transition-base);
    cursor: pointer;
    text-align: center;
}

.btn-large {
    padding: 14px 28px;
    font-size: 1rem;
    border-radius: var(--radius-md);
}

.btn-primary {
    background-color: var(--color-text-primary);
    color: var(--color-bg-base);
    border: 1px solid transparent;
}

.btn-primary:hover {
    background-color: rgba(255, 255, 255, 0.9);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.15);
}

.btn-gradient {
    background: var(--gradient-brand);
    color: #fff;
    border: none;
}

.btn-gradient:hover {
    box-shadow: 0 0 20px rgba(139, 92, 246, 0.4);
    opacity: 0.95;
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border-subtle);
}

.btn-secondary:hover {
    color: var(--color-text-primary);
    border-color: var(--color-border-hover);
    background: var(--color-bg-glass);
}

.btn-ghost {
    border: none;
}

.btn-ghost:hover {
    background: var(--color-bg-glass);
}

.btn-white {
    background: #ffffff;
    color: #000000;
}

.btn-white:hover {
    background: #f4f4f5;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

/* Status Dots */
.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
}

.dot-red { background-color: var(--color-red); }
.dot-yellow { background-color: var(--color-yellow); }
.dot-green { background-color: var(--color-green); }

/* Glass Cards */
.glass-card {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border-subtle);
    position: relative;
    overflow: hidden;
    transition: transform var(--transition-spring), border-color var(--transition-base), box-shadow var(--transition-base);
}

.glass-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(800px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(255, 255, 255, 0.04), transparent 40%);
    z-index: 0;
    pointer-events: none;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.glass-card:hover {
    border-color: var(--color-border-hover);
}

.glass-card:hover::before {
    opacity: 1;
}

.card-rounded {
    border-radius: var(--radius-lg);
}

.shadow-premium {
    box-shadow: var(--shadow-premium);
}

.shadow-premium-large {
    box-shadow: var(--shadow-premium-large);
}

/* --------------------------------------------------------------------------
06. HEADER NAVIGATION
-------------------------------------------------------------------------- */
.header-premium {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-sticky);
    padding: var(--space-md) 0;
    transition: background var(--transition-base), border var(--transition-base), padding var(--transition-base);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.glassmorphism-nav {
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand-logo a {
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo-mark {
    width: 24px;
    height: 24px;
    border-radius: 6px;
    background: var(--gradient-brand);
    position: relative;
}

.logo-mark::after {
    content: '';
    position: absolute;
    inset: 2px;
    background: var(--color-bg-base);
    border-radius: 4px;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-text-primary);
}

.nav-list {
    display: flex;
    gap: var(--space-lg);
    align-items: center;
}

.nav-link {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    font-weight: 500;
}

.nav-link:hover {
    color: var(--color-text-primary);
}

.header-actions {
    display: flex;
    gap: var(--space-sm);
    align-items: center;
}

/* --------------------------------------------------------------------------
07. HERO SECTION
-------------------------------------------------------------------------- */
.section-hero {
    padding-top: calc(var(--space-xxl) + 60px);
    position: relative;
}

.hero-description {
    font-size: 1.25rem;
    max-width: 650px;
    margin: 0 auto var(--space-lg) auto;
    line-height: 1.6;
}

.hero-cta-group {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    margin-bottom: var(--space-xl);
}

/* Hero Preview Mockup */
.preview-card-wrapper {
    margin: 0 auto;
    width: 100%;
    max-width: 1000px;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-xl);
    padding: 8px;
    transform: perspective(1000px) rotateX(2deg);
    transform-origin: bottom center;
    transition: transform var(--transition-slow);
    animation: float 6s ease-in-out infinite;
}

.preview-card-wrapper:hover {
    transform: perspective(1000px) rotateX(0deg);
}

.preview-window {
    background: #000;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border-hover);
    height: 500px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.window-controls {
    display: flex;
    gap: 8px;
    padding: 16px;
    border-bottom: 1px solid var(--color-border-subtle);
    background: rgba(255, 255, 255, 0.02);
}

.window-content {
    flex: 1;
    position: relative;
    background: #050505;
}

.mockup-chat-interface {
    display: flex;
    height: 100%;
    width: 100%;
}

.mockup-video-player {
    flex: 2;
    background: #0a0a0a;
    border-right: 1px solid var(--color-border-subtle);
    position: relative;
}

.mockup-video-player::after {
    content: '▶';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 3rem;
    color: rgba(255, 255, 255, 0.1);
}

.mockup-chat-sidebar {
    flex: 1;
    background: #000;
    padding: var(--space-md);
    position: relative;
}

.mockup-chat-sidebar::before {
    content: '';
    display: block;
    width: 80%;
    height: 12px;
    background: var(--color-border-subtle);
    border-radius: 4px;
    margin-bottom: 16px;
}

.mockup-chat-sidebar::after {
    content: '';
    display: block;
    width: 60%;
    height: 12px;
    background: var(--color-border-subtle);
    border-radius: 4px;
}

/* --------------------------------------------------------------------------
08. STATISTICS SECTION
-------------------------------------------------------------------------- */
.section-statistics {
    border-top: 1px solid var(--color-border-subtle);
    border-bottom: 1px solid var(--color-border-subtle);
    background: rgba(255, 255, 255, 0.01);
}

.stat-card {
    padding: var(--space-lg) var(--space-md);
    text-align: center;
    background: transparent;
    border: none;
    box-shadow: none;
    border-right: 1px solid var(--color-border-subtle);
    border-radius: 0;
}

.stat-card:last-child {
    border-right: none;
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: var(--space-xs);
    letter-spacing: -0.05em;
}

.stat-label {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* --------------------------------------------------------------------------
09. ABOUT & FEATURES
-------------------------------------------------------------------------- */
.premium-card {
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
}

.card-icon {
    font-size: 2rem;
    margin-bottom: var(--space-md);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: var(--color-bg-glass);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-md);
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
    color: var(--color-text-primary);
}

.card-text {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
}

.feature-card {
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
}

.feature-header {
    margin-bottom: var(--space-sm);
}

.feature-title {
    font-size: 1.125rem;
    font-weight: 600;
}

.feature-body p {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}

/* --------------------------------------------------------------------------
10. TIMELINE (HOW IT WORKS)
-------------------------------------------------------------------------- */
.timeline-layout {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline-layout::before {
    content: '';
    position: absolute;
    top: 0;
    left: 24px;
    width: 2px;
    height: 100%;
    background: linear-gradient(to bottom, transparent, var(--color-border-hover), transparent);
}

.timeline-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.timeline-item {
    display: flex;
    gap: var(--space-lg);
    position: relative;
}

.timeline-marker {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: #000;
    border: 2px solid var(--color-border-hover);
    color: var(--color-text-primary);
    font-weight: 700;
    font-size: 1.25rem;
    z-index: 2;
    box-shadow: 0 0 0 8px var(--color-bg-base);
}

.timeline-content {
    flex: 1;
    padding: var(--space-lg);
}

.timeline-content h3 {
    font-size: 1.25rem;
    margin-bottom: var(--space-xs);
}

.timeline-content p {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}

/* --------------------------------------------------------------------------
11. COMPARISON (WHY LINKGPT)
-------------------------------------------------------------------------- */
.comparison-grid {
    align-items: center;
}

.border-subtle {
    border: 1px solid var(--color-border-subtle);
}

.border-highlight {
    border: 1px solid rgba(59, 130, 246, 0.5);
}

.comparison-card {
    padding: var(--space-lg);
}

.scale-up {
    transform: scale(1.05);
    z-index: var(--z-elevate);
    background: linear-gradient(to bottom, #0a0a0a, #050505);
}

.comparison-title {
    font-size: 1.25rem;
    margin-bottom: var(--space-lg);
    text-align: center;
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--color-border-subtle);
}

.comparison-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.comparison-list li {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    display: flex;
    align-items: center;
}

.comparison-list li::before {
    content: '→';
    margin-right: 12px;
    color: var(--color-border-hover);
}

.scale-up .comparison-list li {
    color: var(--color-text-primary);
}

.scale-up .comparison-list li::before {
    content: '✓';
    color: var(--color-green);
}

/* --------------------------------------------------------------------------
12. AUDIENCE
-------------------------------------------------------------------------- */
.audience-card {
    padding: var(--space-md);
    transition: transform var(--transition-base);
}

.audience-card:hover {
    transform: translateY(-5px);
}

.audience-card h3 {
    font-size: 1.125rem;
    margin-bottom: var(--space-xs);
}

.audience-card p {
    color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
13. FUTURE STATS & ANIMATED COUNTERS
-------------------------------------------------------------------------- */
.section-future-stats {
    position: relative;
}

.counter-wrapper {
    padding: var(--space-md);
}

.counter-animated {
    font-size: 3.5rem;
    font-weight: 800;
    letter-spacing: -0.05em;
    color: var(--color-text-primary);
    margin-bottom: var(--space-xs);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.counter-label {
    color: var(--color-text-secondary);
    text-transform: uppercase;
    font-size: 0.875rem;
    letter-spacing: 0.05em;
}

/* --------------------------------------------------------------------------
14. ROADMAP
-------------------------------------------------------------------------- */
.roadmap-column {
    padding: var(--space-lg);
}

.border-green { border-top: 3px solid var(--color-green); }
.border-yellow { border-top: 3px solid var(--color-yellow); }
.border-purple { border-top: 3px solid var(--color-purple); }

.roadmap-title {
    font-size: 1.25rem;
    margin-bottom: var(--space-md);
}

.roadmap-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.roadmap-list li {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    padding: 12px;
    background: var(--color-bg-glass);
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    transition: border var(--transition-fast);
}

.roadmap-list li:hover {
    border-color: var(--color-border-hover);
    color: var(--color-text-primary);
}

/* --------------------------------------------------------------------------
15. MISSION & VISION
-------------------------------------------------------------------------- */
.section-mission,
.section-vision {
    background: radial-gradient(circle at center, rgba(255, 255, 255, 0.03) 0%, transparent 70%);
}

.premium-quote {
    font-size: 2rem;
    line-height: 1.4;
    font-weight: 500;
    font-style: italic;
    color: var(--color-text-primary);
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.premium-quote::before,
.premium-quote::after {
    color: var(--color-border-hover);
    font-size: 4rem;
    position: absolute;
    line-height: 1;
}

.premium-quote::before {
    content: '"';
    top: -20px;
    left: -40px;
}

.premium-quote::after {
    content: '"';
    bottom: -40px;
    right: -40px;
}

.vision-statement {
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

/* --------------------------------------------------------------------------
16. FAQ ACCORDION
-------------------------------------------------------------------------- */
.faq-accordion {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.faq-item {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border-subtle);
    padding: var(--space-md) var(--space-lg);
    cursor: pointer;
    transition: all var(--transition-base);
}

.faq-item:hover {
    border-color: var(--color-border-hover);
}

.faq-item[open] {
    border-color: rgba(59, 130, 246, 0.3);
    background: rgba(255, 255, 255, 0.03);
}

.faq-question {
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--color-text-primary);
    list-style: none;
    position: relative;
    padding-right: 30px;
}

.faq-question::-webkit-details-marker {
    display: none;
}

.faq-question::after {
    content: '+';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.5rem;
    color: var(--color-text-secondary);
    transition: transform var(--transition-base);
}

.faq-item[open] .faq-question::after {
    content: '−';
    transform: translateY(-50%) rotate(180deg);
}

.faq-answer {
    margin-top: var(--space-sm);
    padding-top: var(--space-sm);
    border-top: 1px solid var(--color-border-subtle);
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
    animation: fadeIn 0.3s ease-in-out;
}

/* --------------------------------------------------------------------------
17. CONTACT & CTA
-------------------------------------------------------------------------- */
.contact-card {
    padding: var(--space-xl) var(--space-lg);
}

.contact-title {
    font-size: 1.25rem;
    margin-bottom: var(--space-xs);
}

.contact-desc {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    margin-bottom: var(--space-md);
}

.contact-link {
    color: var(--color-text-primary);
    font-weight: 500;
    text-decoration: underline;
    text-decoration-color: var(--color-border-hover);
    text-underline-offset: 4px;
}

.contact-link:hover {
    text-decoration-color: var(--color-text-primary);
}

.gradient-bg {
    background: linear-gradient(135deg, #0a0a0a 0%, #1a1a1a 100%);
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.gradient-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at top right, rgba(59, 130, 246, 0.2), transparent 50%),
        radial-gradient(circle at bottom left, rgba(139, 92, 246, 0.2), transparent 50%);
    z-index: 0;
}

.gradient-bg>* {
    position: relative;
    z-index: 1;
}

/* --------------------------------------------------------------------------
18. FOOTER
-------------------------------------------------------------------------- */
.footer-premium {
    background: #000;
}

.footer-brand-col {
    padding-right: var(--space-lg);
}

.social-links {
    display: flex;
    gap: var(--space-sm);
}

.social-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--color-bg-glass);
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border-subtle);
    font-size: 0.875rem;
}

.social-icon:hover {
    background: var(--color-text-primary);
    color: #000;
}

.footer-heading {
    font-size: 0.9375rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
    color: var(--color-text-primary);
}

.footer-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer-list a {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

.footer-list a:hover {
    color: var(--color-text-primary);
}

.border-top-subtle {
    border-top: 1px solid var(--color-border-subtle);
}

/* --------------------------------------------------------------------------
19. ANIMATIONS (KEYFRAMES)
-------------------------------------------------------------------------- */
@keyframes float {
    0% { transform: perspective(1000px) rotateX(2deg) translateY(0px); }
    50% { transform: perspective(1000px) rotateX(2deg) translateY(-10px); }
    100% { transform: perspective(1000px) rotateX(2deg) translateY(0px); }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse-glow {
    0% { box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.4); }
    70% { box-shadow: 0 0 0 10px rgba(59, 130, 246, 0); }
    100% { box-shadow: 0 0 0 0 rgba(59, 130, 246, 0); }
}

/* --------------------------------------------------------------------------
20. RESPONSIVE DESIGN (MEDIA QUERIES)
-------------------------------------------------------------------------- */

/* Max Width: 1440px */
@media (max-width: 1440px) {
    .container-large { max-width: 1140px; }
    .heading-display { font-size: 4.5rem; }
}

/* Max Width: 1024px */
@media (max-width: 1024px) {
    .heading-display { font-size: 4rem; }
    .heading-section { font-size: 2.5rem; }

    .grid-4-cols,
    .grid-5-cols {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .stats-grid .stat-card:nth-child(even) {
        border-right: none;
    }

    .stats-grid .stat-card:nth-child(1),
    .stats-grid .stat-card:nth-child(2) {
        border-bottom: 1px solid var(--color-border-subtle);
    }

    .scale-up {
        transform: scale(1);
        box-shadow: var(--shadow-premium);
    }
}

/* Max Width: 768px */
@media (max-width: 768px) {
    .header-actions, .nav-list {
        display: none;
    }

    .heading-display { font-size: 3rem; }
    .heading-section { font-size: 2rem; }
    .hero-description { font-size: 1rem; }

    .grid-3-cols {
        grid-template-columns: repeat(1, 1fr);
    }

    .timeline-layout::before { left: 20px; }
    .timeline-marker { width: 40px; height: 40px; font-size: 1rem; }
    .timeline-item { gap: var(--space-md); }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-lg);
    }

    .footer-brand-col {
        grid-column: 1 / -1;
        padding-right: 0;
        text-align: center;
    }

    .social-links { justify-content: center; }

    .flex-between {
        flex-direction: column;
        gap: var(--space-md);
        text-align: center;
    }

    .preview-window { height: 300px; }
    .spacing-large { padding: var(--space-xl) 0; }
    .spacing-medium { padding: var(--space-lg) 0; }
}

/* Max Width: 480px */
@media (max-width: 480px) {
    html { font-size: 14px; }
    .heading-display { font-size: 2.5rem; }
    .hero-cta-group { flex-direction: column; width: 100%; }
    .btn-large { width: 100%; }

    .grid-4-cols,
    .grid-5-cols,
    .stats-grid {
        grid-template-columns: repeat(1, 1fr);
    }

    .stats-grid .stat-card {
        border-right: none;
        border-bottom: 1px solid var(--color-border-subtle);
    }

    .stats-grid .stat-card:last-child { border-bottom: none; }
    .footer-grid { grid-template-columns: repeat(1, 1fr); text-align: center; }
    .premium-quote { font-size: 1.5rem; }
    .premium-quote::before, .premium-quote::after { font-size: 2.5rem; }
}

/* Max Width: 320px */
@media (max-width: 320px) {
    .heading-display { font-size: 2rem; }
    .heading-section { font-size: 1.75rem; }

    .container-small,
    .container-medium,
    .container-large {
        padding: 0 var(--space-sm);
    }

    .feature-badges .badge-premium {
        font-size: 0.75rem;
        padding: 4px 12px;
    }

    .timeline-marker { width: 32px; height: 32px; font-size: 0.875rem; }
    .timeline-layout::before { left: 16px; }
}