/**
 * EcoGround Premium Design System
 * Version 2.0 - Luxury ESG Corporate Theme
 *
 * Design Philosophy:
 * - Sophisticated dark theme with premium accents
 * - Apple-level glassmorphism
 * - Dramatic typography hierarchy
 * - Fluid animations and micro-interactions
 */

/* ============================================
   CSS CUSTOM PROPERTIES (DESIGN TOKENS)
   ============================================ */
:root {
    /* Premium Dark Palette */
    --color-void: #000000;
    --color-obsidian: #050508;
    --color-carbon: #0a0a0f;
    --color-graphite: #111118;
    --color-slate: #1a1a24;
    --color-steel: #252532;
    --color-silver: #8a8a9a;
    --color-pearl: #c8c8d4;
    --color-ivory: #f0f0f5;
    --color-white: #ffffff;

    /* Premium Accent Colors */
    --accent-emerald: #00d4aa;
    --accent-emerald-glow: rgba(0, 212, 170, 0.4);
    --accent-sapphire: #667eea;
    --accent-sapphire-glow: rgba(102, 126, 234, 0.4);
    --accent-amethyst: #764ba2;
    --accent-amethyst-glow: rgba(118, 75, 162, 0.4);
    --accent-gold: #f4d03f;
    --accent-gold-glow: rgba(244, 208, 63, 0.3);
    --accent-rose: #ff6b9d;

    /* Gradient Definitions */
    --gradient-primary: linear-gradient(135deg, var(--accent-emerald) 0%, var(--accent-sapphire) 100%);
    --gradient-secondary: linear-gradient(135deg, var(--accent-sapphire) 0%, var(--accent-amethyst) 100%);
    --gradient-premium: linear-gradient(135deg, var(--accent-gold) 0%, var(--accent-emerald) 100%);
    --gradient-dark: linear-gradient(180deg, var(--color-obsidian) 0%, var(--color-carbon) 50%, var(--color-graphite) 100%);
    --gradient-glass: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.02) 100%);
    --gradient-text: linear-gradient(90deg, var(--accent-emerald), var(--accent-sapphire), var(--accent-amethyst));

    /* Typography Scale (Fluid) */
    --font-display: 'Playfair Display', 'Noto Serif KR', Georgia, serif;
    --font-heading: 'Montserrat', 'Noto Sans KR', sans-serif;
    --font-body: 'Inter', 'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    --text-hero: clamp(3.5rem, 10vw, 8rem);
    --text-display: clamp(2.5rem, 6vw, 5rem);
    --text-h1: clamp(2rem, 4vw, 3.5rem);
    --text-h2: clamp(1.5rem, 3vw, 2.5rem);
    --text-h3: clamp(1.25rem, 2vw, 1.75rem);
    --text-h4: clamp(1.1rem, 1.5vw, 1.35rem);
    --text-body: clamp(1rem, 1.2vw, 1.125rem);
    --text-small: clamp(0.875rem, 1vw, 0.95rem);
    --text-micro: 0.75rem;

    /* Spacing Scale */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    --space-5xl: 8rem;
    --space-6xl: 12rem;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-2xl: 32px;
    --radius-full: 9999px;

    /* Shadows (Layered for depth) */
    --shadow-subtle: 0 1px 2px rgba(0,0,0,0.1);
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1), 0 4px 8px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 8px rgba(0,0,0,0.12), 0 8px 16px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 16px rgba(0,0,0,0.15), 0 16px 32px rgba(0,0,0,0.15);
    --shadow-xl: 0 12px 24px rgba(0,0,0,0.2), 0 24px 48px rgba(0,0,0,0.2);
    --shadow-glow-emerald: 0 0 40px var(--accent-emerald-glow), 0 0 80px var(--accent-emerald-glow);
    --shadow-glow-sapphire: 0 0 40px var(--accent-sapphire-glow), 0 0 80px var(--accent-sapphire-glow);

    /* Glass Effect */
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-bg-hover: rgba(255, 255, 255, 0.06);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-border-hover: rgba(255, 255, 255, 0.15);
    --glass-blur: blur(20px);

    /* Timing Functions */
    --ease-out-expo: cubic-bezier(0.19, 1, 0.22, 1);
    --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
    --ease-in-out-quart: cubic-bezier(0.76, 0, 0.24, 1);
    --ease-spring: cubic-bezier(0.175, 0.885, 0.32, 1.275);

    /* Transitions */
    --transition-fast: 150ms var(--ease-out-quart);
    --transition-base: 300ms var(--ease-out-expo);
    --transition-slow: 500ms var(--ease-out-expo);
    --transition-slower: 800ms var(--ease-out-expo);

    /* Z-Index Scale */
    --z-base: 1;
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal-backdrop: 400;
    --z-modal: 500;
    --z-tooltip: 600;
    --z-toast: 700;

    /* Container */
    --container-max: 1400px;
    --container-padding: clamp(1rem, 5vw, 3rem);
}

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

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

body {
    font-family: var(--font-body);
    font-size: var(--text-body);
    font-weight: 400;
    line-height: 1.7;
    color: var(--color-pearl);
    background: var(--color-obsidian);
    overflow-x: hidden;
    min-height: 100vh;
}

/* Selection */
::selection {
    background: var(--accent-emerald);
    color: var(--color-void);
}

/* Focus States */
:focus-visible {
    outline: 2px solid var(--accent-emerald);
    outline-offset: 4px;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    html {
        scroll-behavior: auto;
    }
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-white);
    letter-spacing: -0.02em;
}

h1 { font-size: var(--text-h1); }
h2 { font-size: var(--text-h2); }
h3 { font-size: var(--text-h3); }
h4 { font-size: var(--text-h4); }

/* Display Text */
.text-hero {
    font-family: var(--font-display);
    font-size: var(--text-hero);
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -0.03em;
}

.text-display {
    font-family: var(--font-heading);
    font-size: var(--text-display);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

/* Gradient Text */
.text-gradient {
    background: var(--gradient-text);
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.text-gradient-animate {
    animation: gradient-shift 8s linear infinite;
}

@keyframes gradient-shift {
    0%, 100% { background-position: 0% center; }
    50% { background-position: 200% center; }
}

/* Label Text */
.text-label {
    font-family: var(--font-body);
    font-size: var(--text-micro);
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-silver);
}

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

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

.link-hover {
    position: relative;
    display: inline-block;
}

.link-hover::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-base);
}

.link-hover:hover::after {
    width: 100%;
}

p {
    margin-bottom: var(--space-md);
}

p:last-child {
    margin-bottom: 0;
}

ul, ol {
    padding-left: var(--space-xl);
    margin-bottom: var(--space-md);
}

li {
    margin-bottom: var(--space-sm);
}

/* ============================================
   LAYOUT & CONTAINERS
   ============================================ */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.container-fluid {
    width: 100%;
    padding: 0 var(--container-padding);
}

.section {
    padding: var(--space-5xl) 0;
    position: relative;
}

.section-sm {
    padding: var(--space-4xl) 0;
}

.section-lg {
    padding: var(--space-6xl) 0;
}

/* Grid System */
.grid {
    display: grid;
    gap: var(--space-lg);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* Bento Grid */
.bento-grid {
    display: grid;
    gap: var(--space-lg);
}

.bento-span-2 { grid-column: span 2; }
.bento-span-3 { grid-column: span 3; }
.bento-row-2 { grid-row: span 2; }

/* Flex Utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }
.gap-xs { gap: var(--space-xs); }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }
.gap-2xl { gap: var(--space-2xl); }

/* ============================================
   GLASSMORPHISM COMPONENTS
   ============================================ */
.glass {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
}

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.glass-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.glass-card:hover {
    background: var(--glass-bg-hover);
    border-color: var(--glass-border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

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

/* Premium Card with Gradient Border */
.premium-card {
    position: relative;
    background: var(--color-graphite);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    overflow: hidden;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.premium-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-xl);
    padding: 1px;
    background: var(--gradient-primary);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0.3;
    transition: opacity var(--transition-base);
}

.premium-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

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

/* Feature Card */
.card {
    background: linear-gradient(135deg, var(--color-graphite) 0%, var(--color-slate) 100%);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    border: 1px solid var(--glass-border);
    position: relative;
    overflow: hidden;
    transition: all var(--transition-base);
}

.card::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, var(--accent-emerald-glow) 0%, transparent 70%);
    opacity: 0;
    transition: opacity var(--transition-slow);
    pointer-events: none;
}

.card:hover {
    border-color: var(--accent-emerald);
    transform: translateY(-4px);
}

.card:hover::after {
    opacity: 0.1;
}

.card-title {
    font-size: var(--text-h3);
    margin-bottom: var(--space-md);
    color: var(--color-white);
}

.card-text {
    color: var(--color-silver);
    line-height: 1.7;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    font-family: var(--font-body);
    font-size: var(--text-small);
    font-weight: 600;
    letter-spacing: 0.02em;
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    white-space: nowrap;
    text-decoration: none;
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(rgba(255,255,255,0.2), transparent);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.btn:hover::before {
    opacity: 1;
}

/* Primary Button */
.btn-primary {
    background: var(--gradient-primary);
    color: var(--color-void);
    box-shadow: var(--shadow-md), 0 0 20px var(--accent-emerald-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), 0 0 40px var(--accent-emerald-glow);
}

/* Secondary Button */
.btn-secondary {
    background: transparent;
    color: var(--color-white);
    border: 1px solid var(--glass-border);
    backdrop-filter: var(--glass-blur);
}

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

/* Ghost Button */
.btn-ghost {
    background: transparent;
    color: var(--color-pearl);
    padding: var(--space-sm) var(--space-md);
}

.btn-ghost:hover {
    color: var(--accent-emerald);
    background: rgba(0, 212, 170, 0.1);
}

/* Large Button */
.btn-lg {
    padding: var(--space-lg) var(--space-2xl);
    font-size: var(--text-body);
}

/* Icon Button */
.btn-icon {
    width: 48px;
    height: 48px;
    padding: 0;
    border-radius: var(--radius-lg);
}

/* Button with Arrow */
.btn-arrow {
    gap: var(--space-md);
}

.btn-arrow svg,
.btn-arrow .arrow {
    transition: transform var(--transition-base);
}

.btn-arrow:hover svg,
.btn-arrow:hover .arrow {
    transform: translateX(4px);
}

/* ============================================
   HEADER & NAVIGATION
   ============================================ */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-sticky);
    padding: var(--space-lg) 0;
    transition: all var(--transition-base);
}

.site-header::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(5, 5, 8, 0.85);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid transparent;
    opacity: 0;
    transition: all var(--transition-base);
}

.site-header.scrolled::before {
    opacity: 1;
    border-bottom-color: var(--glass-border);
}

.site-header.scrolled {
    padding: var(--space-md) 0;
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
    z-index: 1;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    text-decoration: none;
}

.logo-icon {
    width: 48px;
    height: 48px;
    position: relative;
}

.logo-icon svg {
    width: 100%;
    height: 100%;
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-white);
    letter-spacing: -0.02em;
}

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

/* Desktop Navigation */
.main-nav {
    display: none;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    font-size: var(--text-small);
    font-weight: 500;
    color: var(--color-pearl);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav-link:hover {
    color: var(--color-white);
    background: var(--glass-bg);
}

.nav-link.active {
    color: var(--accent-emerald);
}

/* Dropdown */
.submenu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 220px;
    padding: var(--space-sm);
    background: var(--color-graphite);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-base);
    list-style: none;
    margin: 0;
}

.nav-item:hover .submenu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.submenu li {
    margin: 0;
}

.submenu li a {
    display: block;
    padding: var(--space-sm) var(--space-md);
    font-size: var(--text-small);
    color: var(--color-pearl);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.submenu li a:hover {
    color: var(--color-white);
    background: var(--glass-bg-hover);
    padding-left: var(--space-lg);
}

/* CTA in Nav */
.nav-cta {
    background: var(--gradient-primary);
    color: var(--color-void) !important;
    font-weight: 600;
    border-radius: var(--radius-full);
    padding: var(--space-sm) var(--space-lg) !important;
    margin-left: var(--space-md);
}

.nav-cta:hover {
    box-shadow: var(--shadow-glow-emerald);
    transform: translateY(-2px);
    background: var(--gradient-primary) !important;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
    width: 44px;
    height: 44px;
    padding: 10px;
    background: transparent;
    border: none;
    cursor: pointer;
    z-index: var(--z-fixed);
}

.hamburger-line {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-white);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
    transform-origin: center;
}

.mobile-menu-toggle.active .hamburger-line:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.mobile-menu-toggle.active .hamburger-line:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.mobile-menu-toggle.active .hamburger-line:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* ============================================
   MOBILE NAVIGATION
   ============================================ */
.mobile-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    max-width: 400px;
    height: 100vh;
    height: 100dvh;
    background: var(--color-graphite);
    border-left: 1px solid var(--glass-border);
    z-index: var(--z-modal);
    transition: right var(--transition-slow);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.mobile-nav.active {
    right: 0;
}

.mobile-nav-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-xl);
    border-bottom: 1px solid var(--glass-border);
}

.mobile-nav-title {
    font-family: var(--font-heading);
    font-size: var(--text-h4);
    font-weight: 600;
    color: var(--color-white);
}

.mobile-nav-close {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 2rem;
    color: var(--color-silver);
    transition: color var(--transition-fast);
}

.mobile-nav-close:hover {
    color: var(--color-white);
}

.mobile-nav-list {
    flex: 1;
    padding: var(--space-lg);
    list-style: none;
    margin: 0;
}

.mobile-nav-item {
    border-bottom: 1px solid var(--glass-border);
}

.mobile-nav-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-lg) var(--space-md);
    font-size: var(--text-body);
    font-weight: 500;
    color: var(--color-pearl);
    transition: all var(--transition-fast);
}

.mobile-nav-link:hover {
    color: var(--accent-emerald);
    padding-left: var(--space-lg);
}

.mobile-submenu {
    display: none;
    padding: 0 0 var(--space-md) var(--space-xl);
    list-style: none;
    margin: 0;
}

.mobile-nav-item.active .mobile-submenu {
    display: block;
}

.mobile-submenu li {
    margin: 0;
}

.mobile-submenu a {
    display: block;
    padding: var(--space-sm) var(--space-md);
    font-size: var(--text-small);
    color: var(--color-silver);
    transition: all var(--transition-fast);
}

.mobile-submenu a:hover {
    color: var(--accent-emerald);
}

.mobile-cta {
    margin: var(--space-md);
    background: var(--gradient-primary);
    color: var(--color-void) !important;
    border-radius: var(--radius-lg);
    text-align: center;
    font-weight: 600;
}

.mobile-nav-footer {
    padding: var(--space-xl);
    border-top: 1px solid var(--glass-border);
    text-align: center;
}

.mobile-nav-footer p {
    font-size: var(--text-small);
    color: var(--color-silver);
    margin-bottom: var(--space-sm);
}

/* Overlay */
.mobile-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    z-index: calc(var(--z-modal) - 1);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.mobile-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding-top: 100px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-gradient {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 60% at 50% 0%, var(--accent-sapphire-glow), transparent),
        radial-gradient(ellipse 60% 40% at 80% 80%, var(--accent-amethyst-glow), transparent),
        radial-gradient(ellipse 50% 30% at 10% 60%, var(--accent-emerald-glow), transparent);
    opacity: 0.5;
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 70% 70% at 50% 50%, black, transparent);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 1000px;
    padding: var(--space-2xl);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    font-size: var(--text-small);
    font-weight: 500;
    color: var(--accent-emerald);
    margin-bottom: var(--space-xl);
    backdrop-filter: var(--glass-blur);
}

.hero-badge::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--accent-emerald);
    border-radius: var(--radius-full);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

.hero-title {
    font-family: var(--font-display);
    font-size: var(--text-hero);
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -0.03em;
    color: var(--color-white);
    margin-bottom: var(--space-lg);
}

.hero-title .highlight {
    position: relative;
    display: inline-block;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-description {
    font-size: var(--text-h4);
    font-weight: 400;
    color: var(--color-silver);
    max-width: 700px;
    margin: 0 auto var(--space-2xl);
    line-height: 1.6;
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-lg);
    flex-wrap: wrap;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
    margin-top: var(--space-4xl);
    padding-top: var(--space-3xl);
    border-top: 1px solid var(--glass-border);
}

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

.hero-stat-value {
    font-family: var(--font-heading);
    font-size: var(--text-display);
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
    margin-bottom: var(--space-xs);
}

.hero-stat-label {
    font-size: var(--text-small);
    color: var(--color-silver);
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: var(--space-2xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    color: var(--color-silver);
    font-size: var(--text-micro);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(-10px); }
}

.scroll-indicator::after {
    content: '';
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--color-silver), transparent);
}

/* ============================================
   SECTION HEADERS
   ============================================ */
.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--space-4xl);
}

.section-label {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--text-micro);
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--accent-emerald);
    margin-bottom: var(--space-lg);
}

.section-label::before,
.section-label::after {
    content: '';
    width: 30px;
    height: 1px;
    background: var(--gradient-primary);
}

.section-title {
    font-size: var(--text-h1);
    margin-bottom: var(--space-lg);
}

.section-title .highlight,
.section-title span {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-desc,
.section-description {
    font-size: var(--text-body);
    color: var(--color-silver);
    line-height: 1.8;
}

/* ============================================
   STATS GRID
   ============================================ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
}

.stat-card {
    text-align: center;
    padding: var(--space-2xl);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    backdrop-filter: var(--glass-blur);
    transition: all var(--transition-base);
}

.stat-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-emerald);
    box-shadow: var(--shadow-glow-emerald);
}

.stat-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    font-size: 2rem;
}

.stat-value {
    font-family: var(--font-heading);
    font-size: var(--text-h1);
    font-weight: 800;
    color: var(--color-white);
    line-height: 1;
    margin-bottom: var(--space-sm);
}

.stat-value .unit {
    font-size: 0.5em;
    color: var(--accent-emerald);
}

.stat-label {
    font-size: var(--text-small);
    color: var(--color-silver);
}

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
    background: var(--color-void);
    border-top: 1px solid var(--glass-border);
    padding-top: var(--space-5xl);
}

.footer-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.footer-top {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--space-3xl);
    padding-bottom: var(--space-4xl);
    border-bottom: 1px solid var(--glass-border);
}

.footer-brand {
    max-width: 400px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.footer-logo svg,
.footer-logo-svg {
    width: 40px;
    height: 40px;
}

.footer-logo span {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-white);
}

.footer-tagline {
    font-size: var(--text-h4);
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: var(--space-md);
}

.footer-desc {
    font-size: var(--text-small);
    color: var(--color-silver);
    line-height: 1.8;
    margin-bottom: var(--space-xl);
}

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

.social-link {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    color: var(--color-silver);
    transition: all var(--transition-base);
}

.social-link:hover {
    background: var(--accent-emerald);
    border-color: var(--accent-emerald);
    color: var(--color-void);
    transform: translateY(-4px);
}

.social-link svg {
    width: 20px;
    height: 20px;
}

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

.footer-col h4 {
    font-size: var(--text-body);
    font-weight: 600;
    margin-bottom: var(--space-xl);
    color: var(--color-white);
}

.footer-col ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-col li {
    margin-bottom: var(--space-md);
}

.footer-col a {
    font-size: var(--text-small);
    color: var(--color-silver);
    transition: all var(--transition-fast);
}

.footer-col a:hover {
    color: var(--accent-emerald);
    padding-left: var(--space-sm);
}

.footer-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
    padding: var(--space-3xl) 0;
    border-bottom: 1px solid var(--glass-border);
}

.footer-stats .stat-item {
    text-align: center;
}

.footer-stats .stat-number {
    font-family: var(--font-heading);
    font-size: var(--text-h2);
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
    margin-bottom: var(--space-xs);
}

.footer-stats .stat-label {
    font-size: var(--text-small);
    color: var(--color-silver);
}

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-xl) 0;
    font-size: var(--text-small);
    color: var(--color-silver);
    flex-wrap: wrap;
    gap: var(--space-md);
}

.footer-info p {
    margin-bottom: var(--space-xs);
}

/* ============================================
   SCROLL TO TOP
   ============================================ */
.scroll-to-top {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border: none;
    border-radius: var(--radius-full);
    color: var(--color-void);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-base);
    z-index: var(--z-fixed);
    box-shadow: var(--shadow-lg);
}

.scroll-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.scroll-to-top:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow-emerald);
}

.scroll-to-top svg {
    width: 24px;
    height: 24px;
}

/* ============================================
   FORMS
   ============================================ */
.form-group {
    margin-bottom: var(--space-xl);
}

.form-label {
    display: block;
    font-size: var(--text-small);
    font-weight: 500;
    color: var(--color-pearl);
    margin-bottom: var(--space-sm);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: var(--space-md) var(--space-lg);
    font-family: var(--font-body);
    font-size: var(--text-body);
    color: var(--color-white);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--accent-emerald);
    box-shadow: 0 0 0 3px var(--accent-emerald-glow);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--color-silver);
}

.form-textarea {
    min-height: 150px;
    resize: vertical;
}

/* ============================================
   SLIDER
   ============================================ */
.eco-slider {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-2xl);
}

.slider-wrapper {
    overflow: hidden;
}

.slider-track {
    display: flex;
    transition: transform var(--transition-slower);
}

.slider-slide {
    flex: 0 0 100%;
    position: relative;
    min-height: 500px;
    display: flex;
    align-items: center;
    padding: var(--space-3xl);
    background: linear-gradient(135deg, var(--color-graphite) 0%, var(--color-slate) 100%);
}

.slider-content {
    max-width: 600px;
}

.slider-title {
    font-size: var(--text-h1);
    margin-bottom: var(--space-lg);
}

.slider-text {
    font-size: var(--text-body);
    color: var(--color-silver);
    margin-bottom: var(--space-xl);
}

.slider-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    color: var(--color-white);
    cursor: pointer;
    transition: all var(--transition-base);
    z-index: 10;
}

.slider-nav:hover {
    background: var(--accent-emerald);
    border-color: var(--accent-emerald);
    color: var(--color-void);
}

.slider-prev {
    left: var(--space-lg);
}

.slider-next {
    right: var(--space-lg);
}

.slider-pagination {
    display: flex;
    justify-content: center;
    gap: var(--space-sm);
    margin-top: var(--space-xl);
}

.slider-dot {
    width: 12px;
    height: 12px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.slider-dot.active {
    width: 32px;
    background: var(--gradient-primary);
    border-color: transparent;
}

/* ============================================
   FAQ ACCORDION
   ============================================ */
.faq-item {
    margin-bottom: var(--space-md);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-lg) var(--space-xl);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    font-family: var(--font-body);
    font-size: var(--text-body);
    font-weight: 500;
    color: var(--color-white);
    text-align: left;
    cursor: pointer;
    transition: all var(--transition-base);
}

.faq-question:hover {
    background: var(--glass-bg-hover);
    border-color: var(--accent-emerald);
}

.faq-question .icon {
    font-size: 1.5rem;
    transition: transform var(--transition-base);
}

.faq-item.active .faq-question {
    background: var(--glass-bg-hover);
    border-color: var(--accent-emerald);
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
}

.faq-item.active .faq-question .icon {
    transform: rotate(45deg);
}

.faq-answer {
    display: none;
    padding: var(--space-xl);
    background: var(--color-graphite);
    border: 1px solid var(--glass-border);
    border-top: none;
    border-bottom-left-radius: var(--radius-lg);
    border-bottom-right-radius: var(--radius-lg);
}

.faq-item.active .faq-answer {
    display: block;
}

.faq-answer p {
    color: var(--color-silver);
    line-height: 1.8;
}

/* ============================================
   ACCESSIBILITY
   ============================================ */
.skip-link {
    position: absolute;
    top: -100%;
    left: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    background: var(--accent-emerald);
    color: var(--color-void);
    font-weight: 600;
    border-radius: var(--radius-md);
    z-index: var(--z-toast);
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: var(--space-md);
}

/* Screen reader only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ============================================
   UTILITIES
   ============================================ */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-0 { margin-top: 0; }
.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); }
.mt-2xl { margin-top: var(--space-2xl); }
.mt-3xl { margin-top: var(--space-3xl); }
.mt-4xl { margin-top: var(--space-4xl); }

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.mb-2xl { margin-bottom: var(--space-2xl); }
.mb-3xl { margin-bottom: var(--space-3xl); }
.mb-4xl { margin-bottom: var(--space-4xl); }

.pt-0 { padding-top: 0 !important; }
.pb-0 { padding-bottom: 0 !important; }

.hidden { display: none !important; }
.visible { display: block !important; }

.overflow-hidden { overflow: hidden; }

/* Color utilities */
.text-white { color: var(--color-white); }
.text-light { color: var(--color-pearl); }
.text-muted { color: var(--color-silver); }
.text-accent { color: var(--accent-emerald); }

.bg-glass { background: var(--glass-bg); }
.bg-dark { background: var(--color-graphite); }
.bg-darker { background: var(--color-obsidian); }

/* D-flex helper */
.d-flex { display: flex; }