:root {
  --primary: #7c3aed;
  --primary-light: #a78bfa;
  --primary-dark: #5b21b6;
  --primary-glow: rgba(124, 58, 237, 0.3);
  --bg: #0a0a0f;
  --bg-card: #13131a;
  --bg-card-hover: #1a1a25;
  --bg-glass: rgba(19, 19, 26, 0.8);
  --border: rgba(124, 58, 237, 0.15);
  --border-light: rgba(255, 255, 255, 0.06);
  --text: #f1f1f4;
  --text-muted: #9ca3af;
  --text-dim: #6b7280;
  --success: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 30px rgba(124, 58, 237, 0.15);
  --transition: 0.2s ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary); }
img { max-width: 100%; display: block; }

#navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav-container {
  max-width: 1200px; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
  height: 72px;
}

.nav-logo {
  font-size: 1.4rem; font-weight: 800; color: var(--text);
  display: flex; align-items: center; gap: 4px;
}
.logo-icon { color: var(--primary); font-size: 1.2rem; }
.nav-links { display: flex; gap: 32px; }
.nav-links a { color: var(--text-muted); font-weight: 500; font-size: 0.95rem; }
.nav-links a:hover, .nav-links a.active { color: var(--text); }
.nav-actions { display: flex; align-items: center; gap: 16px; }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 4px; }
.nav-toggle span {
  display: block; width: 24px; height: 2px; background: var(--text);
  margin: 5px 0; transition: var(--transition);
}
#authSection { display: flex; align-items: center; gap: 12px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 28px; border-radius: var(--radius-sm); font-weight: 600;
  font-size: 0.95rem; cursor: pointer; transition: var(--transition);
  border: none; text-decoration: none; white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white; box-shadow: 0 4px 15px rgba(124, 58, 237, 0.3);
}
.btn-primary:hover {
  transform: translateY(-1px); box-shadow: 0 6px 25px rgba(124, 58, 237, 0.4); color: white;
}
.btn-secondary {
  background: transparent; color: var(--text); border: 1px solid var(--border);
}
.btn-secondary:hover { border-color: var(--primary); color: var(--primary-light); }
.btn-ghost { background: transparent; color: var(--text-muted); padding: 8px 16px; }
.btn-ghost:hover { color: var(--text); }
.btn-sm { padding: 8px 18px; font-size: 0.85rem; }
.btn-lg { padding: 16px 36px; font-size: 1.05rem; }
.btn-danger { background: var(--danger); color: white; }
.btn-success { background: var(--success); color: white; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px; transition: var(--transition);
}
.card:hover { border-color: rgba(124, 58, 237, 0.3); box-shadow: var(--shadow-glow); }

.glass-card {
  background: var(--bg-glass); backdrop-filter: blur(12px);
  border: 1px solid var(--border); border-radius: var(--radius); padding: 24px;
}

.hero {
  padding: 160px 0 100px; text-align: center; position: relative; overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; top: -50%; left: -50%; width: 200%; height: 200%;
  background: radial-gradient(circle at 50% 50%, rgba(124, 58, 237, 0.08) 0%, transparent 60%);
  animation: pulse 8s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 0.5; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.1); }
}
.hero-content { position: relative; z-index: 1; max-width: 800px; margin: 0 auto; }
.hero h1 {
  font-size: 3.5rem; font-weight: 800; line-height: 1.15; margin-bottom: 20px;
  background: linear-gradient(135deg, var(--text) 0%, var(--primary-light) 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.hero .subtitle {
  font-size: 1.25rem; color: var(--text-muted); margin-bottom: 36px;
  max-width: 600px; margin-left: auto; margin-right: auto;
}
.hero-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero-media {
  margin-top: 60px; border-radius: var(--radius-lg);
  border: 1px solid var(--border); overflow: hidden; box-shadow: var(--shadow-glow);
  max-width: 900px; margin-left: auto; margin-right: auto;
  aspect-ratio: 16/9; background: var(--bg-card);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-dim); font-size: 1.1rem;
}
.hero-media img, .hero-media video { width: 100%; height: 100%; object-fit: cover; }

.section { padding: 100px 0; }
.section-dark { background: rgba(19, 19, 26, 0.5); }
.section-header { text-align: center; margin-bottom: 60px; }
.section-header h2 { font-size: 2.2rem; font-weight: 700; margin-bottom: 16px; }
.section-header p { color: var(--text-muted); font-size: 1.1rem; max-width: 600px; margin: 0 auto; }
.section-badge {
  display: inline-block; padding: 6px 16px;
  background: rgba(124, 58, 237, 0.15); color: var(--primary-light);
  border-radius: 20px; font-size: 0.8rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 1px; margin-bottom: 16px;
}

.products-stack {
  display: flex; flex-direction: column; gap: 0;
}
.product-stack-item {
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center;
  padding: 80px 0; border-bottom: 1px solid var(--border);
  position: relative;
}
.product-stack-item:last-child { border-bottom: none; }
.product-stack-item.reversed .product-stack-image { order: 2; }
.product-stack-item.reversed .product-stack-content { order: 1; }
.product-stack-image {
  border-radius: var(--radius-lg); overflow: hidden;
  border: 1px solid var(--border); aspect-ratio: 16/10;
  background: linear-gradient(135deg, var(--bg-card), #1a1a2e);
  display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow); transition: var(--transition);
  position: relative;
}
.product-stack-item:hover .product-stack-image {
  border-color: rgba(124, 58, 237, 0.3); box-shadow: var(--shadow-glow);
  transform: scale(1.02);
}
.product-stack-image img { width: 100%; height: 100%; object-fit: cover; }
.product-stack-image .placeholder-icon { font-size: 4rem; opacity: 0.2; color: var(--primary-light); }
.product-stack-content {}
.product-stack-content .product-stack-tags { display: flex; gap: 8px; margin-bottom: 16px; }
.tag {
  padding: 4px 10px; border-radius: 4px; font-size: 0.7rem;
  font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px;
}
.tag-type { background: rgba(124, 58, 237, 0.8); color: white; }
.tag-platform { background: rgba(16, 185, 129, 0.8); color: white; }
.product-stack-content h3 {
  font-size: 1.8rem; font-weight: 700; margin-bottom: 16px; line-height: 1.3;
}
.product-stack-content .product-stack-desc {
  color: var(--text-muted); font-size: 1.05rem; line-height: 1.7; margin-bottom: 24px;
}
.product-stack-features {
  list-style: none; margin-bottom: 32px; padding: 0;
}
.product-stack-features li {
  padding: 10px 0; color: var(--text-muted); font-size: 0.95rem;
  display: flex; align-items: center; gap: 12px;
  border-bottom: 1px solid rgba(124, 58, 237, 0.08);
}
.product-stack-features li:last-child { border-bottom: none; }
.product-stack-features li .check-icon {
  width: 24px; height: 24px; border-radius: 50%; flex-shrink: 0;
  background: rgba(16, 185, 129, 0.15); color: var(--success);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.8rem; font-weight: 700;
}
.product-stack-footer {
  display: flex; align-items: center; gap: 20px; flex-wrap: wrap;
}
.product-stack-price {
  font-size: 1.8rem; font-weight: 700; color: var(--primary-light);
}
.product-price { font-size: 1.5rem; font-weight: 700; color: var(--primary-light); }

.features-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px;
}
.feature-card { text-align: center; padding: 40px 24px; }
.feature-icon {
  width: 64px; height: 64px; margin: 0 auto 20px;
  background: rgba(124, 58, 237, 0.15); border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; color: var(--primary-light);
}
.feature-card h3 { font-size: 1.1rem; margin-bottom: 8px; }
.feature-card p { color: var(--text-muted); font-size: 0.9rem; }

.steps-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 32px; }
.step-card { text-align: center; position: relative; }
.step-number {
  width: 48px; height: 48px; margin: 0 auto 16px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 1.2rem;
}
.step-card h3 { margin-bottom: 8px; }
.step-card p { color: var(--text-muted); font-size: 0.9rem; }

.testimonials-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 24px;
}
.testimonial-card { padding: 32px; }
.testimonial-card .quote { color: var(--text-muted); font-style: italic; margin-bottom: 16px; line-height: 1.7; }
.testimonial-card .author { font-weight: 600; color: var(--primary-light); }

.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  margin-bottom: 8px; overflow: hidden;
}
.faq-question {
  width: 100%; padding: 18px 24px; background: var(--bg-card);
  border: none; color: var(--text); font-size: 1rem; font-weight: 500;
  text-align: left; cursor: pointer; display: flex;
  justify-content: space-between; align-items: center; transition: var(--transition);
}
.faq-question:hover { background: var(--bg-card-hover); }
.faq-question .icon { color: var(--primary-light); font-size: 1.2rem; transition: var(--transition); }
.faq-item.open .faq-question .icon { transform: rotate(45deg); }
.faq-answer {
  max-height: 0; overflow: hidden; transition: max-height 0.3s ease;
  background: rgba(19, 19, 26, 0.5);
}
.faq-item.open .faq-answer { max-height: 500px; }
.faq-answer p { padding: 0 24px 18px; color: var(--text-muted); font-size: 0.95rem; line-height: 1.7; }

.disclaimer-section {
  background: rgba(239, 68, 68, 0.05); border: 1px solid rgba(239, 68, 68, 0.15);
  border-radius: var(--radius); padding: 32px; margin-top: 40px;
}
.disclaimer-section h3 { color: var(--danger); margin-bottom: 12px; }
.disclaimer-section p { color: var(--text-muted); font-size: 0.9rem; line-height: 1.7; }

.cta-section {
  text-align: center; padding: 80px 24px;
  background: linear-gradient(135deg, rgba(124, 58, 237, 0.1), transparent);
  border-radius: var(--radius-lg); margin: 40px 0;
}
.cta-section h2 { font-size: 2rem; margin-bottom: 16px; }
.cta-section p { color: var(--text-muted); margin-bottom: 32px; max-width: 500px; margin-left: auto; margin-right: auto; }

.product-detail { padding: 120px 0 60px; }
.product-detail-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start;
}
.product-gallery {
  border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--border); aspect-ratio: 16/10;
  background: var(--bg-card); display: flex; align-items: center; justify-content: center;
}
.product-gallery img { width: 100%; height: 100%; object-fit: cover; }
.product-info h1 { font-size: 2rem; margin-bottom: 8px; }
.product-info .product-meta { display: flex; gap: 12px; margin-bottom: 20px; }
.product-info .price-tag { font-size: 2rem; font-weight: 700; color: var(--primary-light); margin-bottom: 24px; }
.product-info .description { color: var(--text-muted); line-height: 1.8; margin-bottom: 24px; }
.product-features-list { list-style: none; margin-bottom: 24px; }
.product-features-list li { padding: 8px 0; color: var(--text-muted); display: flex; align-items: start; gap: 10px; }
.product-features-list li::before { content: '\2713'; color: var(--success); font-weight: 700; flex-shrink: 0; }
.includes-list { margin-bottom: 32px; }
.includes-list h3 { margin-bottom: 12px; }
.compatibility-box {
  background: rgba(16, 185, 129, 0.1); border: 1px solid rgba(16, 185, 129, 0.2);
  border-radius: var(--radius-sm); padding: 16px; margin-bottom: 24px;
}
.compatibility-box h4 { color: var(--success); margin-bottom: 4px; }
.compatibility-box p { color: var(--text-muted); font-size: 0.9rem; }

.dashboard { padding: 100px 0 60px; }
.dashboard-header {
  display: flex; justify-content: space-between; align-items: center; margin-bottom: 32px;
}
.dashboard-header h1 { font-size: 1.8rem; }
.dashboard-tabs {
  display: flex; gap: 4px; margin-bottom: 32px;
  border-bottom: 1px solid var(--border); overflow-x: auto;
}
.dashboard-tab {
  padding: 12px 24px; background: none; border: none;
  color: var(--text-muted); font-weight: 500; font-size: 0.95rem;
  cursor: pointer; border-bottom: 2px solid transparent;
  transition: var(--transition); white-space: nowrap;
}
.dashboard-tab:hover { color: var(--text); }
.dashboard-tab.active { color: var(--primary-light); border-bottom-color: var(--primary); }
.dashboard-content { min-height: 400px; }

.data-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.data-table th, .data-table td {
  padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--border);
}
.data-table th {
  color: var(--text-muted); font-weight: 600; font-size: 0.8rem;
  text-transform: uppercase; letter-spacing: 0.5px;
}
.data-table tr:hover td { background: rgba(124, 58, 237, 0.03); }
.table-container { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--border); }

.form-group { margin-bottom: 20px; }
.form-group label {
  display: block; margin-bottom: 6px; font-weight: 500;
  font-size: 0.9rem; color: var(--text-muted);
}
.form-input, .form-textarea, .form-select {
  width: 100%; padding: 12px 16px; background: var(--bg-card);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  color: var(--text); font-size: 0.95rem; font-family: inherit; transition: var(--transition);
}
.form-input:focus, .form-textarea:focus, .form-select:focus {
  outline: none; border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.15);
}
.form-textarea { resize: vertical; min-height: 100px; }
.form-select { appearance: none; cursor: pointer; }
.form-checkbox { display: flex; align-items: start; gap: 10px; }
.form-checkbox input { margin-top: 4px; accent-color: var(--primary); }

.badge {
  display: inline-block; padding: 4px 10px;
  border-radius: 4px; font-size: 0.75rem; font-weight: 600;
}
.badge-success { background: rgba(16, 185, 129, 0.15); color: var(--success); }
.badge-danger { background: rgba(239, 68, 68, 0.15); color: var(--danger); }
.badge-warning { background: rgba(245, 158, 11, 0.15); color: var(--warning); }
.badge-info { background: rgba(124, 58, 237, 0.15); color: var(--primary-light); }
.badge-muted { background: rgba(107, 114, 128, 0.15); color: var(--text-dim); }

.modal-overlay {
  position: fixed; inset: 0; z-index: 2000;
  background: rgba(0, 0, 0, 0.7); backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center;
  padding: 20px; opacity: 0; pointer-events: none; transition: opacity 0.2s ease;
}
.modal-overlay.active { opacity: 1; pointer-events: auto; }
.modal-content {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 32px;
  max-width: 600px; width: 100%; max-height: 80vh; overflow-y: auto;
}
.modal-content h2 { margin-bottom: 20px; }

.alert {
  padding: 14px 20px; border-radius: var(--radius-sm); margin-bottom: 16px; font-size: 0.9rem;
}
.alert-info { background: rgba(124, 58, 237, 0.1); border: 1px solid rgba(124, 58, 237, 0.2); color: var(--primary-light); }
.alert-success { background: rgba(16, 185, 129, 0.1); border: 1px solid rgba(16, 185, 129, 0.2); color: var(--success); }
.alert-danger { background: rgba(239, 68, 68, 0.1); border: 1px solid rgba(239, 68, 68, 0.2); color: var(--danger); }
.alert-warning { background: rgba(245, 158, 11, 0.1); border: 1px solid rgba(245, 158, 11, 0.2); color: var(--warning); }

.stats-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px; margin-bottom: 32px;
}
.stat-card { padding: 24px; text-align: center; }
.stat-card .stat-value { font-size: 2rem; font-weight: 700; color: var(--primary-light); margin-bottom: 4px; }
.stat-card .stat-label { color: var(--text-muted); font-size: 0.85rem; }

#footer {
  border-top: 1px solid var(--border); padding: 60px 0 30px;
  background: rgba(10, 10, 15, 0.95);
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px;
}
.footer-brand p { color: var(--text-muted); font-size: 0.9rem; margin-top: 12px; }
.footer-links h4 { margin-bottom: 16px; font-size: 0.9rem; color: var(--text); }
.footer-links a { display: block; color: var(--text-muted); font-size: 0.85rem; margin-bottom: 10px; }
.footer-links a:hover { color: var(--primary-light); }
.footer-disclaimer {
  padding: 24px; background: rgba(239, 68, 68, 0.05);
  border: 1px solid rgba(239, 68, 68, 0.1);
  border-radius: var(--radius-sm); margin-bottom: 24px;
}
.footer-disclaimer p { color: var(--text-muted); font-size: 0.8rem; line-height: 1.6; }
.footer-bottom { text-align: center; padding-top: 24px; border-top: 1px solid var(--border); }
.footer-bottom p { color: var(--text-dim); font-size: 0.8rem; }

.legal-page { padding: 120px 24px 60px; max-width: 800px; margin: 0 auto; }
.legal-page h1 { font-size: 2rem; margin-bottom: 8px; }
.legal-page .last-updated { color: var(--text-dim); margin-bottom: 32px; }
.legal-page h2 { font-size: 1.3rem; margin: 32px 0 12px; color: var(--primary-light); }
.legal-page h3 { font-size: 1.1rem; margin: 24px 0 8px; }
.legal-page p, .legal-page li { color: var(--text-muted); line-height: 1.8; margin-bottom: 12px; }
.legal-page ul { padding-left: 24px; }
.legal-page li { margin-bottom: 8px; }

.loading { display: flex; align-items: center; justify-content: center; padding: 60px; color: var(--text-muted); }
.spinner {
  width: 32px; height: 32px; border: 3px solid var(--border);
  border-top-color: var(--primary); border-radius: 50%;
  animation: spin 0.8s linear infinite; margin-right: 12px;
}
@keyframes spin { to { transform: rotate(360deg); } }

.success-page { padding: 140px 0 80px; text-align: center; }
.success-icon {
  width: 80px; height: 80px; margin: 0 auto 24px;
  background: rgba(16, 185, 129, 0.15); border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 2rem; color: var(--success);
}

.empty-state { text-align: center; padding: 60px 20px; color: var(--text-muted); }
.empty-state .empty-icon { font-size: 3rem; margin-bottom: 16px; opacity: 0.3; }
.empty-state h3 { margin-bottom: 8px; color: var(--text); }

.admin-sidebar {
  position: fixed; left: 0; top: 72px; bottom: 0; width: 240px;
  background: var(--bg-card); border-right: 1px solid var(--border);
  padding: 24px 0; overflow-y: auto; z-index: 100;
}
.admin-nav-item {
  display: block; padding: 10px 24px; color: var(--text-muted);
  font-size: 0.9rem; font-weight: 500; cursor: pointer; border: none;
  background: none; width: 100%; text-align: left; transition: var(--transition);
  text-decoration: none;
}
.admin-nav-item:hover { color: var(--text); background: rgba(124, 58, 237, 0.05); }
.admin-nav-item.active { color: var(--primary-light); background: rgba(124, 58, 237, 0.1); border-right: 2px solid var(--primary); }
.admin-main { margin-left: 240px; padding: 100px 32px 40px; }
.admin-section-header {
  display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px;
}
.admin-section-header h2 { font-size: 1.4rem; }

.agreement-text {
  max-height: 300px; overflow-y: auto; padding: 16px;
  background: rgba(0,0,0,0.3); border-radius: var(--radius-sm);
  margin-bottom: 20px; font-size: 0.85rem; color: var(--text-muted);
  line-height: 1.7; white-space: pre-line;
}

.user-dropdown { position: relative; }
.user-trigger {
  display: flex; align-items: center; gap: 8px;
  background: none; border: 1px solid var(--border);
  padding: 6px 14px; border-radius: 20px;
  color: var(--text); cursor: pointer; font-size: 0.85rem; transition: var(--transition);
}
.user-trigger:hover { border-color: var(--primary); }
.user-avatar {
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--primary); display: flex; align-items: center;
  justify-content: center; font-size: 0.7rem; font-weight: 700; color: white;
}
.user-avatar img { width: 100%; height: 100%; border-radius: 50%; object-fit: cover; }
.dropdown-menu {
  position: absolute; top: 100%; right: 0; margin-top: 8px;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 8px;
  min-width: 200px; box-shadow: var(--shadow);
  opacity: 0; pointer-events: none; transform: translateY(-8px);
  transition: var(--transition); z-index: 100;
}
.dropdown-menu.active { opacity: 1; pointer-events: auto; transform: translateY(0); }
.dropdown-item {
  display: block; width: 100%; padding: 8px 16px;
  background: none; border: none; color: var(--text-muted);
  font-size: 0.85rem; text-align: left; cursor: pointer;
  border-radius: 4px; transition: var(--transition); text-decoration: none;
}
.dropdown-item:hover { background: rgba(124, 58, 237, 0.1); color: var(--text); }
.dropdown-divider { height: 1px; background: var(--border); margin: 4px 0; }

.contact-page { padding: 120px 0 60px; }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; max-width: 900px; margin: 0 auto; }
.contact-info h2 { margin-bottom: 16px; }
.contact-info p { color: var(--text-muted); margin-bottom: 12px; line-height: 1.7; }

@media (max-width: 768px) {
  .hero h1 { font-size: 2.2rem; }
  .hero { padding: 120px 0 60px; }
  .nav-links {
    position: fixed; top: 72px; left: 0; right: 0;
    background: var(--bg-card); border-bottom: 1px solid var(--border);
    flex-direction: column; padding: 16px 24px; gap: 12px; display: none;
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .product-detail-grid { grid-template-columns: 1fr; gap: 24px; }
  .product-stack-item { grid-template-columns: 1fr; gap: 32px; padding: 60px 0; }
  .product-stack-item.reversed .product-stack-image { order: 0; }
  .product-stack-item.reversed .product-stack-content { order: 0; }
  .product-stack-content h3 { font-size: 1.4rem; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
  .features-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .admin-sidebar { display: none; }
  .admin-sidebar.open { display: block; width: 100%; z-index: 500; }
  .admin-main { margin-left: 0; padding: 100px 16px 40px; }
  .data-table { font-size: 0.8rem; }
  .data-table th, .data-table td { padding: 8px 10px; }
  .dashboard-tabs { gap: 0; }
  .dashboard-tab { padding: 10px 14px; font-size: 0.85rem; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 1.8rem; }
  .footer-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
}

.auth-tab {
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  padding: 10px 20px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  margin-bottom: -2px;
  transition: color 0.2s, border-color 0.2s;
}
.auth-tab:hover { color: var(--text); }
.auth-tab.active { color: var(--primary); border-bottom-color: var(--primary); }