/* =====================================================
   Sürdürülebilirlik.com.tr by Türkçev Çevre - Main Styles
   Sürdürülebilirlik Danışmanlık Sitesi
   ===================================================== */

/* CSS Variables */
:root {
  /* Primary - Derin Lacivert (Güven) */
  --primary-900: #0a1628;
  --primary-800: #1a2744;
  --primary-700: #1e3a5f;

  /* Accent - Elektrik Yeşil (Aksiyon/Aktivizm) */
  --accent-500: #00ff88;
  --accent-400: #4fffab;
  --accent-600: #00cc6a;

  /* Secondary - Turuncu/Amber (Enerji/Aciliyet) */
  --warning-500: #ff6b35;
  --warning-400: #ff8c5a;

  /* Neutrals */
  --neutral-50: #f8fafc;
  --neutral-100: #f1f5f9;
  --neutral-200: #e2e8f0;
  --neutral-300: #cbd5e1;
  --neutral-400: #94a3b8;
  --neutral-500: #64748b;
  --neutral-600: #475569;
  --neutral-700: #334155;
  --neutral-800: #1e293b;
  --neutral-900: #0f172a;

  /* Semantic */
  --carbon: #2d3436;
  --water: #0984e3;
  --energy: #fdcb6e;
  --waste: #a29bfe;

  /* Glass Effect */
  --glass-bg: rgba(255, 255, 255, 0.1);
  --glass-border: rgba(255, 255, 255, 0.2);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  --spacing-4xl: 6rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

  /* Typography */
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

/* Dark Mode Variables */
[data-theme="dark"] {
  --bg-primary: var(--primary-900);
  --bg-secondary: var(--primary-800);
  --bg-tertiary: var(--primary-700);
  --text-primary: var(--neutral-50);
  --text-secondary: var(--neutral-300);
  --text-muted: var(--neutral-400);
  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.1);
}

/* Light Mode Variables */
[data-theme="light"] {
  --bg-primary: var(--neutral-50);
  --bg-secondary: var(--neutral-100);
  --bg-tertiary: var(--neutral-200);
  --text-primary: var(--primary-900);
  --text-secondary: var(--neutral-700);
  --text-muted: var(--neutral-500);
  --glass-bg: rgba(0, 0, 0, 0.04);
  --glass-border: rgba(0, 0, 0, 0.12);
  --accent-500: #00c96b;
  --accent-400: #00e07a;
  --accent-600: #00a858;
}

[data-theme="light"] .hero-background::before {
  background: linear-gradient(135deg, #e8edf2 0%, #dce3eb 50%, #d0d9e4 100%);
}

[data-theme="light"] .hero-background::after {
  background: radial-gradient(ellipse at 30% 20%, rgba(0, 201, 107, 0.08) 0%, transparent 50%),
              radial-gradient(ellipse at 70% 80%, rgba(0, 168, 88, 0.08) 0%, transparent 50%);
}

[data-theme="light"] .hero-title,
[data-theme="light"] .hero-subtitle,
[data-theme="light"] .hero-content h1,
[data-theme="light"] .hero-content p {
  color: var(--primary-900);
}

[data-theme="light"] .highlight {
  -webkit-text-fill-color: var(--accent-500);
}

[data-theme="light"] .text-accent {
  -webkit-text-fill-color: var(--accent-500);
  color: var(--accent-500);
}

[data-theme="light"] .scroll-indicator {
  color: var(--primary-900);
}

[data-theme="light"] .grid-pattern {
  opacity: 0.03;
}

[data-theme="light"] .process-step,
[data-theme="light"] .accordion-header,
[data-theme="light"] .accordion-body {
  color: var(--primary-900);
}

[data-theme="light"] .form-input,
[data-theme="light"] .form-select,
[data-theme="light"] .form-textarea {
  background: rgba(255, 255, 255, 0.9);
  border-color: rgba(0, 0, 0, 0.15);
  color: var(--primary-900);
}

[data-theme="light"] .nav-link {
  color: var(--primary-900);
}

[data-theme="light"] .project-card-content h3,
[data-theme="light"] .project-card-content p {
  color: var(--primary-900);
}

[data-theme="light"] .card,
[data-theme="light"] .card-glass {
  background: rgba(255, 255, 255, 0.8);
  border-color: rgba(0, 0, 0, 0.1);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

[data-theme="light"] .btn-primary {
  background: var(--accent-500);
  color: var(--primary-900);
}

[data-theme="light"] .btn-secondary {
  border-color: var(--accent-500);
  color: var(--primary-900);
}

[data-theme="light"] .btn-outline {
  border-color: var(--accent-500);
  color: var(--primary-900);
}

[data-theme="light"] .tag {
  background: rgba(0, 201, 107, 0.1);
  color: var(--accent-600);
  border-color: rgba(0, 201, 107, 0.2);
}

[data-theme="light"] .counter-item {
  color: var(--primary-900);
}

[data-theme="light"] .section-header h2,
[data-theme="light"] .section-header p {
  color: var(--primary-900);
}

[data-theme="light"] .card-title {
  color: var(--primary-900);
}

[data-theme="light"] .card-description {
  color: var(--neutral-600);
}

[data-theme="light"] .testimonial-card {
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(0, 0, 0, 0.1);
}

[data-theme="light"] .testimonial-text {
  color: var(--neutral-700);
}

[data-theme="light"] .logo .logo-text small {
  -webkit-text-fill-color: var(--neutral-500);
}

/* Light mode - glass cards hover */
[data-theme="light"] .card-glass:hover {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

/* Light mode - dashboard cards */
[data-theme="light"] .dashboard-card {
  background: rgba(255, 255, 255, 0.85);
  border-color: rgba(0, 0, 0, 0.08);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

/* Light mode - content cards */
[data-theme="light"] .content-card {
  background: rgba(255, 255, 255, 0.9);
  border-color: rgba(0, 0, 0, 0.08);
}

/* Light mode - filter bar */
[data-theme="light"] .filter-bar {
  background: rgba(255, 255, 255, 0.8);
  border-color: rgba(0, 0, 0, 0.1);
}

[data-theme="light"] .filter-label {
  color: var(--primary-900);
}

[data-theme="light"] .tab-button {
  color: var(--neutral-600);
}

[data-theme="light"] .tab-button:hover {
  color: var(--primary-900);
  background: rgba(0, 0, 0, 0.04);
}

[data-theme="light"] .tab-button.active {
  color: var(--accent-600);
  background: rgba(0, 168, 88, 0.1);
}

/* Light mode - project cards */
[data-theme="light"] .project-card {
  background: rgba(255, 255, 255, 0.9);
  border-color: rgba(0, 0, 0, 0.08);
}

[data-theme="light"] .project-card-metric {
  color: var(--accent-600);
}

/* Light mode - accordion items */
[data-theme="light"] .accordion-item {
  background: rgba(255, 255, 255, 0.8);
  border-color: rgba(0, 0, 0, 0.1);
}

/* Light mode - featured card (insights) */
[data-theme="light"] .featured-card {
  background: linear-gradient(135deg, var(--neutral-200), var(--neutral-100));
}

/* Light mode - counter value */
[data-theme="light"] .counter-value {
  color: var(--primary-900);
}

/* Light mode - progress bar background */
[data-theme="light"] .progress {
  background: rgba(0, 0, 0, 0.06);
}

/* Light mode - timeline */
[data-theme="light"] .timeline::before {
  background: rgba(0, 0, 0, 0.12);
}

[data-theme="light"] .timeline-item::before {
  border-color: var(--neutral-50);
}

/* Light mode - service card text */
[data-theme="light"] .service-card h3,
[data-theme="light"] .service-card h4 {
  color: var(--primary-900);
}

/* Light mode - slider dots */
[data-theme="light"] .slider-dot {
  background: rgba(0, 0, 0, 0.15);
}

/* Light mode - badge */
[data-theme="light"] .badge {
  background: var(--accent-600);
}

/* Light mode - text-muted in specific elements */
[data-theme="light"] .footer-brand p,
[data-theme="light"] .footer-links li {
  color: var(--neutral-400);
}

/* Light mode - CTA sections keep dark background */
[data-theme="light"] section[style*="primary-800"] {
  color: var(--neutral-50);
}

[data-theme="light"] section[style*="primary-800"] h2,
[data-theme="light"] section[style*="primary-800"] p,
[data-theme="light"] section[style*="primary-800"] .text-accent {
  color: var(--neutral-50);
}

[data-theme="light"] section[style*="primary-800"] .text-accent {
  -webkit-text-fill-color: var(--accent-400);
}

/* Light mode - card with dark inline bg (project case study) */
[data-theme="light"] .card[style*="primary-800"] h4,
[data-theme="light"] .card[style*="primary-800"] p,
[data-theme="light"] .card[style*="primary-800"] .timeline-content h4,
[data-theme="light"] .card[style*="primary-800"] .timeline-content p {
  color: var(--neutral-50);
}

/* Light mode - cookie banner */
[data-theme="light"] .cookie-content p {
  color: var(--neutral-300);
}

/* Light mode - modal */
[data-theme="light"] .modal-overlay {
  background: rgba(0, 0, 0, 0.5);
}

/* Light mode - carbon badge in footer */
[data-theme="light"] .carbon-badge {
  background: rgba(0, 201, 107, 0.15);
  color: var(--accent-600);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2vw, 1.5rem); }

p {
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
}

a {
  color: var(--accent-500);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--accent-400);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul, ol {
  list-style: none;
}

/* Container */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.container-sm {
  max-width: 768px;
}

.container-lg {
  max-width: 1536px;
}

/* Section */
.section {
  padding: var(--spacing-4xl) 0;
}

.section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto var(--spacing-3xl);
}

.section-header h2 {
  margin-bottom: var(--spacing-md);
}

.section-header p {
  font-size: 1.125rem;
}

/* Header / Navigation */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--spacing-lg) 0;
  transition: all var(--transition-base);
}

.header.scrolled {
  background: rgba(10, 22, 40, 0.95);
  backdrop-filter: blur(20px);
  padding: var(--spacing-md) 0;
  box-shadow: var(--shadow-lg);
}

[data-theme="light"] .header.scrolled {
  background: rgba(248, 250, 252, 0.95);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.logo svg,
.logo img {
  width: 52px;
  height: 52px;
  object-fit: contain;
  border-radius: 6px;
}

.logo span {
  background: linear-gradient(135deg, var(--accent-500), var(--accent-400));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-size: 1rem;
}

.logo .logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.logo .logo-text small {
  font-size: 0.65rem;
  font-weight: 500;
  opacity: 0.7;
  background: none;
  -webkit-background-clip: unset;
  -webkit-text-fill-color: var(--neutral-400);
  background-clip: unset;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}

.nav-links {
  display: flex;
  gap: var(--spacing-lg);
}

.nav-link {
  color: var(--text-secondary);
  font-weight: 500;
  position: relative;
  padding: var(--spacing-xs) 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-500);
  transition: width var(--transition-base);
}

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

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition-base);
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

/* Mobile Menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-primary);
  z-index: 999;
  padding: 100px var(--spacing-lg) var(--spacing-lg);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

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

.mobile-menu .nav-links {
  flex-direction: column;
  gap: var(--spacing-lg);
}

.mobile-menu .nav-link {
  font-size: 1.5rem;
}

/* Theme Toggle */
.theme-toggle {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  padding: var(--spacing-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
}

.theme-toggle:hover {
  background: var(--accent-500);
  border-color: var(--accent-500);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
  fill: var(--text-primary);
}

.theme-toggle:hover svg {
  fill: var(--primary-900);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding-top: 80px;
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: -1;
}

.hero-background::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, var(--primary-900) 0%, var(--primary-800) 50%, var(--primary-700) 100%);
}

.hero-background::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at 30% 20%, rgba(0, 255, 136, 0.1) 0%, transparent 50%),
              radial-gradient(ellipse at 70% 80%, rgba(0, 204, 106, 0.1) 0%, transparent 50%);
}

.hero-content {
  text-align: center;
  max-width: 900px;
  padding: var(--spacing-xl);
  position: relative;
  z-index: 1;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  margin-bottom: var(--spacing-lg);
  line-height: 1.1;
}

.hero-title .highlight {
  background: linear-gradient(135deg, var(--accent-500), var(--accent-400));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-2xl);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

.scroll-indicator {
  position: absolute;
  bottom: var(--spacing-2xl);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-muted);
  font-size: 0.875rem;
  animation: bounce 2s infinite;
}

.scroll-indicator svg {
  width: 24px;
  height: 24px;
  fill: var(--accent-500);
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateX(-50%) translateY(0);
  }
  40% {
    transform: translateX(-50%) translateY(-10px);
  }
  60% {
    transform: translateX(-50%) translateY(-5px);
  }
}

/* Particles Container */
#particles-container {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 0;
  pointer-events: none;
}

/* Grid Pattern */
.grid-pattern {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 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: 50px 50px;
  z-index: 0;
}

/* Footer */
.footer {
  background: var(--primary-900);
  color: var(--neutral-300);
  padding: var(--spacing-4xl) 0 var(--spacing-xl);
}

[data-theme="light"] .footer {
  background: var(--neutral-900);
  color: var(--neutral-300);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--spacing-3xl);
  margin-bottom: var(--spacing-3xl);
}

.footer-brand p {
  margin: var(--spacing-md) 0 var(--spacing-lg);
  color: var(--neutral-400);
}

.footer-social {
  display: flex;
  gap: var(--spacing-md);
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--neutral-300);
  transition: all var(--transition-base);
}

.footer-social a:hover {
  background: var(--accent-500);
  color: var(--primary-900);
  border-color: var(--accent-500);
}

.footer-column h4 {
  color: var(--neutral-50);
  font-size: 1rem;
  margin-bottom: var(--spacing-lg);
}

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

.footer-links a {
  color: var(--neutral-400);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--accent-500);
}

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

.footer-bottom p {
  color: var(--neutral-500);
  font-size: 0.875rem;
  margin: 0;
}

.footer-legal {
  display: flex;
  gap: var(--spacing-lg);
}

.footer-legal a {
  color: var(--neutral-500);
  font-size: 0.875rem;
}

.carbon-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  background: rgba(0, 255, 136, 0.1);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  color: var(--accent-500);
}

/* Back to Top Button */
.back-to-top {
  position: fixed;
  bottom: var(--spacing-xl);
  right: var(--spacing-xl);
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: var(--accent-500);
  color: var(--primary-900);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  border: none;
  z-index: 100;
  box-shadow: var(--shadow-lg);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 25px rgba(0, 255, 136, 0.3);
}

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

/* Cookie Banner */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--primary-800);
  padding: var(--spacing-lg);
  z-index: 1001;
  transform: translateY(100%);
  transition: transform var(--transition-base);
}

.cookie-banner.visible {
  transform: translateY(0);
}

[data-theme="light"] .cookie-banner {
  background: var(--neutral-800);
}

.cookie-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-lg);
  max-width: 1280px;
  margin: 0 auto;
}

.cookie-content p {
  margin: 0;
  color: var(--neutral-300);
  font-size: 0.875rem;
}

.cookie-actions {
  display: flex;
  gap: var(--spacing-md);
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-accent { color: var(--accent-500); }
.text-muted { color: var(--text-muted); }

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

.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

.relative { position: relative; }
.overflow-hidden { overflow: hidden; }

/* Visually Hidden (Accessibility) */
.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;
}

/* 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;
  }
}