@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-light: #eef2ff;
  --primary-gradient: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
  --secondary: #06b6d4;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --bg-page: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-subtle: #f1f5f9;
  --border-color: #e2e8f0;
  --border-focus: #818cf8;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  --font-main: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-family: var(--font-main);
  background-color: var(--bg-page);
  color: var(--text-main);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header & Navbar */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  transition: all 0.2s ease;
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-main);
  font-weight: 700;
  font-size: 1.25rem;
}

.brand-icon {
  width: 38px;
  height: 38px;
  background: var(--primary-gradient);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  box-shadow: 0 4px 10px rgba(79, 70, 229, 0.3);
  font-size: 1.2rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
}

.nav-link {
  text-decoration: none;
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.925rem;
  padding: 0.5rem 0.875rem;
  border-radius: var(--radius-sm);
  transition: all 0.15s ease;
}

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

.nav-link.active {
  color: var(--primary);
  background: var(--primary-light);
  font-weight: 600;
}

.nav-cta {
  background: var(--primary-gradient);
  color: white !important;
  font-weight: 600;
  padding: 0.5rem 1.1rem;
  border-radius: var(--radius-full);
  box-shadow: 0 2px 8px rgba(79, 70, 229, 0.25);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.35);
}

/* Page Hero */
.page-hero {
  background: linear-gradient(180deg, #ffffff 0%, var(--bg-page) 100%);
  border-bottom: 1px solid var(--border-color);
  padding: 3.5rem 1.5rem 2.5rem;
  text-align: center;
}

.hero-container {
  max-width: 850px;
  margin: 0 auto;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 1rem;
}

.badge-play {
  background: #e0f2fe;
  color: #0369a1;
  border: 1px solid #bae6fd;
}

.badge-verified {
  background: #dcfce7;
  color: #15803d;
  border: 1px solid #bbf7d0;
}

.hero-title {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1.2;
  color: var(--text-main);
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 650px;
  margin: 0 auto 1.25rem;
}

.meta-info {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  font-size: 0.875rem;
  color: var(--text-light);
}

.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

/* Main Layout Grid */
.main-wrapper {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 2.5rem;
  flex: 1;
}

.full-width-wrapper {
  max-width: 1000px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
  flex: 1;
}

/* Sidebar Navigation */
.doc-sidebar {
  position: sticky;
  top: 5.5rem;
  height: calc(100vh - 7rem);
  overflow-y: auto;
  padding-right: 1rem;
}

.toc-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
}

.toc-title {
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-light);
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.toc-link {
  display: block;
  font-size: 0.875rem;
  color: var(--text-muted);
  text-decoration: none;
  padding: 0.35rem 0.6rem;
  border-radius: var(--radius-sm);
  transition: all 0.15s ease;
  line-height: 1.4;
}

.toc-link:hover {
  color: var(--primary);
  background: var(--primary-light);
  transform: translateX(3px);
}

/* Content Area */
.doc-content {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-sm);
}

.doc-section {
  margin-bottom: 2.5rem;
  scroll-margin-top: 6rem;
}

.doc-section:last-child {
  margin-bottom: 0;
}

.doc-section h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--primary-light);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.doc-section h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-main);
  margin: 1.25rem 0 0.5rem;
}

.doc-section p {
  color: #334155;
  margin-bottom: 1rem;
  font-size: 0.975rem;
}

.doc-section ul, .doc-section ol {
  margin: 0.75rem 0 1.25rem 1.5rem;
  color: #334155;
}

.doc-section li {
  margin-bottom: 0.4rem;
  font-size: 0.95rem;
}

/* Callout Boxes */
.callout {
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  margin: 1.25rem 0;
  border-left: 4px solid;
}

.callout-info {
  background: #eff6ff;
  border-color: #3b82f6;
  color: #1e40af;
}

.callout-warning {
  background: #fffbeb;
  border-color: #f59e0b;
  color: #92400e;
}

.callout-success {
  background: #f0fdf4;
  border-color: #22c55e;
  color: #166534;
}

.callout-title {
  font-weight: 700;
  font-size: 0.925rem;
  margin-bottom: 0.25rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.callout p {
  margin-bottom: 0 !important;
  font-size: 0.9rem !important;
  color: inherit !important;
}

/* Tables */
.data-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.25rem 0;
  font-size: 0.9rem;
}

.data-table th {
  background: var(--bg-card-subtle);
  padding: 0.75rem 1rem;
  text-align: left;
  font-weight: 600;
  color: var(--text-main);
  border-bottom: 2px solid var(--border-color);
}

.data-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-color);
  color: #334155;
  vertical-align: top;
}

.data-table tr:hover td {
  background: #fafafa;
}

/* Forms & Interactive Cards */
.form-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  margin-bottom: 2rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--text-main);
  margin-bottom: 0.4rem;
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: inherit;
  font-size: 0.95rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: #ffffff;
  color: var(--text-main);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all 0.15s ease;
  text-decoration: none;
}

.btn-primary {
  background: var(--primary-gradient);
  color: white;
  box-shadow: 0 2px 6px rgba(79, 70, 229, 0.3);
}

.btn-primary:hover {
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.4);
  transform: translateY(-1px);
}

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

.btn-outline:hover {
  background: var(--bg-card-subtle);
  border-color: var(--text-light);
}

.btn-danger {
  background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  color: white;
}

/* Feature & Hub Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.hub-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  text-decoration: none;
  color: inherit;
}

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

.hub-card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.hub-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text-main);
}

.hub-card-desc {
  font-size: 0.925rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  flex: 1;
}

.hub-card-action {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

/* FAQ Accordion */
.faq-item {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 0.75rem;
  background: var(--bg-card);
  overflow: hidden;
}

.faq-question {
  padding: 1rem 1.25rem;
  font-weight: 600;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}

.faq-question:hover {
  background: var(--bg-card-subtle);
}

.faq-answer {
  padding: 0 1.25rem 1rem;
  color: #475569;
  font-size: 0.925rem;
}

/* Contact Info Items */
.contact-info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.contact-info-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.contact-info-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

/* Footer */
.site-footer {
  background: #0f172a;
  color: #94a3b8;
  padding: 3rem 1.5rem 2rem;
  margin-top: auto;
  border-top: 1px solid #1e293b;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 2rem;
}

.footer-brand h4 {
  color: #ffffff;
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
}

.footer-brand p {
  font-size: 0.9rem;
  max-width: 350px;
  line-height: 1.5;
}

.footer-links h5 {
  color: #ffffff;
  font-size: 0.95rem;
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-links ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-links a {
  color: #94a3b8;
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.15s ease;
}

.footer-links a:hover {
  color: #ffffff;
}

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding-top: 1.5rem;
  border-top: 1px solid #1e293b;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
}

/* Notification toast */
.alert-toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: #10b981;
  color: white;
  padding: 1rem 1.5rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  font-weight: 600;
  display: none;
  z-index: 100;
  animation: slideIn 0.3s ease forwards;
}

@keyframes slideIn {
  from { transform: translateY(100%); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* Responsive design */
@media (max-width: 900px) {
  .main-wrapper {
    grid-template-columns: 1fr;
  }
  .doc-sidebar {
    display: none;
  }
  .footer-container {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .hero-title {
    font-size: 2rem;
  }
  .doc-content {
    padding: 1.5rem;
  }
}