/* ============================================
   AIYI Art Studio - Global Styles
   ============================================ */

:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #111118;
  --bg-card: #16161f;
  --bg-card-hover: #1e1e2a;
  --text-primary: #ffffff;
  --text-secondary: #a0a0b0;
  --text-muted: #6b6b7b;
  --brand-teal: #00d4aa;
  --brand-purple: #c44fd8;
  --brand-gradient: linear-gradient(135deg, #00d4aa, #c44fd8);
  --border-color: rgba(255, 255, 255, 0.08);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --container-max: 1280px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.5rem, 5vw, 4.5rem); }
h2 { font-size: clamp(1.8rem, 3.5vw, 3rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); }

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--brand-teal);
  margin-bottom: 1rem;
}

.section-label::before {
  content: '';
  width: 24px;
  height: 2px;
  background: var(--brand-gradient);
}

/* Layout */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 100px 0;
  position: relative;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  border: none;
  font-family: inherit;
}

.btn-primary {
  background: var(--brand-gradient);
  color: #fff;
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #c44fd8, #00d4aa);
  opacity: 0;
  transition: opacity 0.35s ease;
}

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

.btn-primary span {
  position: relative;
  z-index: 1;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(0, 212, 170, 0.25);
}

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

.btn-outline:hover {
  border-color: var(--brand-teal);
  color: var(--brand-teal);
  background: rgba(0, 212, 170, 0.05);
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 20px 0;
  transition: var(--transition);
}

.navbar.scrolled {
  padding: 14px 0;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-logo img {
  height: 40px;
  width: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 40px;
  list-style: none;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--brand-gradient);
  transition: width 0.3s ease;
}

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

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

.nav-cta {
  display: flex;
  align-items: center;
  gap: 16px;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
}

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

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

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% -10%, rgba(0, 212, 170, 0.12), transparent),
    radial-gradient(ellipse 60% 50% at 80% 80%, rgba(196, 79, 216, 0.08), transparent);
  pointer-events: none;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, black, transparent);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, black, transparent);
  pointer-events: none;
}

.hero-content {
  text-align: center;
  max-width: 900px;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  border-radius: 100px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  background: var(--brand-teal);
  border-radius: 50%;
  animation: pulse 2s ease infinite;
}

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

.hero h1 {
  margin-bottom: 24px;
  line-height: 1.1;
}

.hero h1 .gradient-text {
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: clamp(1rem, 1.5vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 40px;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.8rem;
  animation: bounce 2s ease infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(-8px); }
}

/* Section Header */
.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 64px;
}

.section-header h2 {
  margin-bottom: 16px;
}

.section-header p {
  color: var(--text-secondary);
  font-size: 1.05rem;
}

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 40px;
  transition: var(--transition);
}

.card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(0, 212, 170, 0.2);
  transform: translateY(-4px);
}

.card-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 212, 170, 0.08);
  border-radius: var(--radius-sm);
  margin-bottom: 24px;
  font-size: 1.5rem;
}

.card h3 {
  margin-bottom: 12px;
}

.card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* Grid */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 32px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 24px;
}

/* Portfolio Grid - Masonry (vertical posters) */
.portfolio-grid {
  column-count: 3;
  column-gap: 24px;
}

.portfolio-item {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  break-inside: avoid;
  margin-bottom: 24px;
  background: var(--bg-card);
}

.portfolio-item img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.portfolio-item:hover img {
  transform: scale(1.08);
}

.portfolio-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10, 10, 15, 0.95) 0%, rgba(10, 10, 15, 0.3) 50%, transparent 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 24px;
  opacity: 0;
  transition: opacity 0.35s ease;
}

.portfolio-item:hover .portfolio-overlay {
  opacity: 1;
}

.portfolio-overlay .tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--brand-gradient);
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 8px;
  width: fit-content;
}

.portfolio-overlay h4 {
  font-size: 1.1rem;
  margin-bottom: 4px;
}

.portfolio-overlay p {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* Filter Tabs */
.filter-tabs {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.filter-tab {
  padding: 10px 24px;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: 100px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  font-family: inherit;
}

.filter-tab:hover,
.filter-tab.active {
  background: rgba(0, 212, 170, 0.1);
  border-color: var(--brand-teal);
  color: var(--brand-teal);
}

/* Stats */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 32px;
  text-align: center;
}

.stat-item .number {
  font-size: 3rem;
  font-weight: 800;
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.stat-item .label {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-top: 8px;
}

/* About Page */
.about-hero {
  padding-top: 160px;
  padding-bottom: 80px;
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-image {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.about-image::before {
  content: '';
  position: absolute;
  inset: -2px;
  background: var(--brand-gradient);
  border-radius: calc(var(--radius-lg) + 2px);
  z-index: -1;
  opacity: 0.3;
}

.about-image img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
}

.about-text h2 {
  margin-bottom: 24px;
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 20px;
  line-height: 1.8;
}

/* Values */
.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.value-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px;
  text-align: center;
  transition: var(--transition);
}

.value-card:hover {
  border-color: rgba(0, 212, 170, 0.2);
  transform: translateY(-4px);
}

.value-card .icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.value-card h4 {
  margin-bottom: 8px;
}

.value-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Timeline */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--brand-gradient);
  transform: translateX(-50%);
}

.timeline-item {
  display: flex;
  justify-content: flex-end;
  padding-right: 50%;
  position: relative;
  margin-bottom: 48px;
}

.timeline-item:nth-child(even) {
  justify-content: flex-start;
  padding-right: 0;
  padding-left: 50%;
}

.timeline-dot {
  position: absolute;
  left: 50%;
  top: 0;
  width: 16px;
  height: 16px;
  background: var(--bg-primary);
  border: 3px solid var(--brand-teal);
  border-radius: 50%;
  transform: translateX(-50%);
  z-index: 1;
}

.timeline-content {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  max-width: 320px;
}

.timeline-content .year {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--brand-teal);
  margin-bottom: 8px;
}

.timeline-content h4 {
  margin-bottom: 8px;
}

.timeline-content p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Services Page */
.service-card-large {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  transition: var(--transition);
}

.service-card-large:hover {
  border-color: rgba(0, 212, 170, 0.15);
}

.service-card-large:nth-child(even) .service-image {
  order: 2;
}

.service-image {
  position: relative;
  min-height: 360px;
}

.service-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  inset: 0;
}

.service-info {
  padding: 48px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.service-info .tag {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(0, 212, 170, 0.1);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--brand-teal);
  margin-bottom: 20px;
  width: fit-content;
}

.service-info h3 {
  margin-bottom: 16px;
  font-size: 1.8rem;
}

.service-info p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 24px;
}

.service-features {
  list-style: none;
}

.service-features li {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 12px;
}

.service-features li::before {
  content: '✓';
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 212, 170, 0.15);
  color: var(--brand-teal);
  border-radius: 50%;
  font-size: 0.7rem;
  font-weight: 700;
  flex-shrink: 0;
}

/* Process */
.process-steps {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  margin-top: 64px;
  position: relative;
}

.process-steps::before {
  content: '';
  position: absolute;
  top: 32px;
  left: 60px;
  right: 60px;
  height: 2px;
  background: var(--border-color);
}

.process-step {
  flex: 1;
  text-align: center;
  position: relative;
}

.process-step .step-num {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border: 2px solid var(--border-color);
  border-radius: 50%;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--brand-teal);
  margin: 0 auto 20px;
  position: relative;
  z-index: 1;
}

.process-step h4 {
  margin-bottom: 8px;
}

.process-step p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Contact Page */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 64px;
  align-items: start;
}

.contact-info h2 {
  margin-bottom: 16px;
}

.contact-info > p {
  color: var(--text-secondary);
  margin-bottom: 40px;
}

.contact-methods {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-method {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.contact-method:hover {
  border-color: rgba(0, 212, 170, 0.2);
}

.contact-method .icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 212, 170, 0.08);
  border-radius: var(--radius-sm);
  font-size: 1.25rem;
  flex-shrink: 0;
}

.contact-method .info h4 {
  margin-bottom: 4px;
  font-size: 1rem;
}

.contact-method .info p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Form */
.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 48px;
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 14px 18px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  transition: var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--brand-teal);
  background: rgba(0, 212, 170, 0.03);
}

.form-group textarea {
  min-height: 140px;
  resize: vertical;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

/* Footer */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 64px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand img {
  height: 36px;
  margin-bottom: 16px;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
  max-width: 280px;
}

.footer-column h4 {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.footer-column ul {
  list-style: none;
}

.footer-column li {
  margin-bottom: 12px;
}

.footer-column a {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-column a:hover {
  color: var(--brand-teal);
}

.footer-social {
  display: flex;
  gap: 12px;
  margin-top: 20px;
}

.footer-social a {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  transition: var(--transition);
}

.footer-social a:hover {
  background: rgba(0, 212, 170, 0.1);
  border-color: var(--brand-teal);
  color: var(--brand-teal);
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-bottom p {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* CTA Section */
.cta-section {
  text-align: center;
  padding: 120px 0;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 50% at 50% 50%, rgba(0, 212, 170, 0.06), transparent);
  pointer-events: none;
}

.cta-section h2 {
  margin-bottom: 20px;
  position: relative;
}

.cta-section p {
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto 32px;
  position: relative;
}

/* Animations */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(10, 10, 15, 0.95);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.lightbox.active {
  opacity: 1;
  visibility: visible;
}

.lightbox img {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
  border-radius: var(--radius-md);
}

.lightbox-close {
  position: absolute;
  top: 24px;
  right: 24px;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  transition: var(--transition);
}

.lightbox-close:hover {
  background: var(--brand-teal);
  border-color: var(--brand-teal);
  color: #fff;
}

/* Responsive */
@media (max-width: 1024px) {
  .portfolio-grid {
    column-count: 2;
  }

  .about-content,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .service-card-large {
    grid-template-columns: 1fr;
  }

  .service-card-large:nth-child(even) .service-image {
    order: 0;
  }

  .service-image {
    min-height: 240px;
  }

  .values-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .timeline::before {
    left: 20px;
  }

  .timeline-item,
  .timeline-item:nth-child(even) {
    justify-content: flex-start;
    padding-left: 56px;
    padding-right: 0;
  }

  .timeline-dot {
    left: 20px;
    transform: translateX(-50%);
  }

  .process-steps {
    flex-direction: column;
  }

  .process-steps::before {
    display: none;
  }
}

@media (max-width: 640px) {
  .portfolio-grid {
    column-count: 1;
  }
}

@media (max-width: 768px) {
  .nav-links,
  .nav-cta .btn {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .mobile-menu {
    position: fixed;
    inset: 0;
    background: var(--bg-primary);
    z-index: 999;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 32px;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
  }

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

  .mobile-menu a {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
  }

  .mobile-menu .btn {
    display: flex;
  }

  section {
    padding: 60px 0;
  }

  .hero {
    padding-top: 100px;
  }

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .contact-form {
    padding: 32px 24px;
  }
}

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

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

::-webkit-scrollbar-thumb {
  background: var(--bg-card);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: #2a2a3a;
}