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

    body {
      font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
      background-color: #ffffff;
      color: #1f2937;
      line-height: 1.6;
    }

    .container {
      max-width: 1100px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* ── Header ── */
    header {
      background: linear-gradient(135deg, #0284c7 0%, #0ea5e9 100%);
      color: white;
      padding: 16px 0;
      position: sticky;
      top: 0;
      z-index: 100;
      box-shadow: 0 1px 3px rgba(0,0,0,0.15);
    }

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

    .header-brand {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 20px;
      font-weight: 700;
      color: white;
      text-decoration: none;
    }

    nav a {
      color: rgba(255,255,255,0.9);
      text-decoration: none;
      margin-left: 24px;
      font-size: 14px;
      transition: color 0.2s;
    }

    nav a:hover { color: white; }

    /* ── Hero ── */
    .hero {
      background: linear-gradient(160deg, #0284c7 0%, #0ea5e9 60%, #38bdf8 100%);
      color: white;
      padding: 80px 20px 96px;
      text-align: center;
    }

    .hero-eyebrow {
      font-size: 13px;
      font-weight: 600;
      letter-spacing: 1.5px;
      text-transform: uppercase;
      opacity: 0.85;
      margin-bottom: 16px;
    }

    .hero h2 {
      font-size: 44px;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 20px;
    }

    .hero p {
      font-size: 17px;
      opacity: 0.92;
      margin-bottom: 40px;
      max-width: 560px;
      margin-left: auto;
      margin-right: auto;
    }

    .cta-buttons {
      display: flex;
      gap: 12px;
      justify-content: center;
      flex-wrap: wrap;
    }

    .btn {
      padding: 12px 28px;
      border-radius: 10px;
      border: none;
      font-size: 15px;
      font-weight: 600;
      cursor: pointer;
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      transition: all 0.2s;
    }

    .btn-white {
      background-color: white;
      color: #0284c7;
    }

    .btn-white:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 16px rgba(0,0,0,0.18);
    }

    .btn-outline {
      background-color: rgba(255,255,255,0.15);
      color: white;
      border: 2px solid rgba(255,255,255,0.7);
      height: 48px;
      padding: 0 20px;
      border-radius: 8px;
      font-size: 13px;
    }

    .btn-outline:hover {
      background-color: rgba(255,255,255,0.25);
    }

    .btn-disabled {
      opacity: 0.6;
      cursor: not-allowed;
      pointer-events: none;
    }

    /* ── Stats ── */
    .stats-bar {
      background: #f0f9ff;
      border-top: 1px solid #bae6fd;
      border-bottom: 1px solid #bae6fd;
    }

    .stats-bar .container {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 0;
    }

    .stat-item {
      padding: 36px 20px;
      text-align: center;
      border-right: 1px solid #bae6fd;
    }

    .stat-item:last-child { border-right: none; }

    .stat-number {
      font-size: 34px;
      font-weight: 800;
      color: #0284c7;
      margin-bottom: 4px;
    }

    .stat-label {
      font-size: 13px;
      color: #64748b;
    }

    /* ── Section commons ── */
    .section-label {
      font-size: 12px;
      font-weight: 700;
      letter-spacing: 1.5px;
      text-transform: uppercase;
      color: #0284c7;
      margin-bottom: 8px;
    }

    .section-title {
      font-size: 30px;
      font-weight: 800;
      color: #1f2937;
      margin-bottom: 12px;
    }

    .section-sub {
      font-size: 15px;
      color: #64748b;
      max-width: 540px;
    }

    /* ── Features ── */
    .features {
      padding: 88px 20px;
    }

    .features-header {
      margin-bottom: 56px;
    }

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

    .feature-card {
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      border-radius: 16px;
      padding: 28px 24px;
      transition: all 0.2s;
    }

    .feature-card:hover {
      border-color: #93c5fd;
      box-shadow: 0 8px 24px rgba(2,132,199,0.1);
      transform: translateY(-3px);
    }

    .feature-icon-wrap {
      width: 48px;
      height: 48px;
      background: #e0f2fe;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
      color: #0284c7;
      font-size: 24px;
    }

    .feature-card h4 {
      font-size: 16px;
      font-weight: 700;
      color: #1f2937;
      margin-bottom: 8px;
    }

    .feature-card p {
      font-size: 13px;
      color: #64748b;
      line-height: 1.7;
    }

    /* ── How it works ── */
    .howto {
      padding: 80px 20px;
      background: #f8fafc;
    }

    .howto-header {
      text-align: center;
      margin-bottom: 56px;
    }

    .howto-header .section-sub {
      margin: 0 auto;
    }

    .steps {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 32px;
      counter-reset: steps;
    }

    .step {
      text-align: center;
      counter-increment: steps;
    }

    .step-num {
      width: 52px;
      height: 52px;
      background: linear-gradient(135deg, #0284c7, #0ea5e9);
      color: white;
      font-size: 22px;
      font-weight: 800;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px;
    }

    .step h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
      color: #1f2937;
    }

    .step p {
      font-size: 13px;
      color: #64748b;
      line-height: 1.7;
    }

    /* ── CTA ── */
    .cta-section {
      background: linear-gradient(135deg, #0284c7 0%, #0ea5e9 100%);
      color: white;
      padding: 80px 20px;
      text-align: center;
    }

    .cta-section h3 {
      font-size: 32px;
      font-weight: 800;
      margin-bottom: 12px;
    }

    .cta-section p {
      font-size: 16px;
      margin-bottom: 36px;
      opacity: 0.9;
    }

    /* ── Footer ── */
    footer {
      background: #1f2937;
      color: white;
      padding: 40px 20px;
      text-align: center;
    }

    .footer-links {
      display: flex;
      justify-content: center;
      gap: 24px;
      flex-wrap: wrap;
      margin-bottom: 20px;
    }

    .footer-links a {
      color: #d1d5db;
      text-decoration: none;
      font-size: 14px;
      transition: color 0.2s;
    }

    .footer-links a:hover { color: white; }

    .footer-copy {
      font-size: 12px;
      color: #6b7280;
      border-top: 1px solid #374151;
      padding-top: 20px;
      line-height: 1.8;
    }

    /* Material Symbols */
    .material-symbols-outlined {
      font-family: 'Material Symbols Outlined';
      font-weight: normal;
      font-style: normal;
      font-size: 24px;
      line-height: 1;
      letter-spacing: normal;
      text-transform: none;
      display: inline-block;
      white-space: nowrap;
      direction: ltr;
      -webkit-font-smoothing: antialiased;
    }

    .material-symbols-outlined.icon-xs { font-size: 14px; }
    .material-symbols-outlined.icon-sm { font-size: 18px; }
    .material-symbols-outlined.icon-md { font-size: 20px; }

    /* ── Notice Bar ── */
    .notice-bar {
      background: #fffbeb;
      border-bottom: 1px solid #fde68a;
      padding: 10px 20px;
    }

    .notice-bar .container {
      display: flex;
      flex-direction: column;
      gap: 4px;
    }

    .notice-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      color: #92400e;
    }

    .notice-item .material-symbols-outlined {
      font-size: 16px;
      color: #d97706;
      flex-shrink: 0;
    }

    /* ── Responsive ── */
    @media (max-width: 640px) {
      .hero h2 { font-size: 30px; }
      .hero p { font-size: 15px; }
      .section-title { font-size: 24px; }
      .cta-section h3 { font-size: 24px; }
      .header-brand { font-size: 16px; }
      nav { display: none; }
      .stats-bar .container { grid-template-columns: 1fr; }
      .stat-item { border-right: none; border-bottom: 1px solid #bae6fd; padding: 24px 20px; }
      .stat-item:last-child { border-bottom: none; }
    }

/* ── Shared simple pages ── */
body.page-simple main .container {
  max-width: 900px;
}

body.page-simple main {
  padding: 40px 20px;
}

body.page-simple h2 {
  font-size: 28px;
  margin: 40px 0 20px;
  color: #0284c7;
}

body.page-simple h2:first-of-type {
  margin-top: 0;
}

body.page-simple h3 {
  font-size: 18px;
  margin: 24px 0 12px;
  color: #1f2937;
  font-weight: 600;
}

body.page-simple h4 {
  font-size: 15px;
  margin: 18px 0 8px;
  color: #1f2937;
  font-weight: 700;
}

body.page-simple p {
  margin-bottom: 12px;
  line-height: 1.8;
  color: #4b5563;
}

body.page-simple footer p,
body.page-beta footer p {
  color: inherit;
  margin-bottom: 0;
}

body.page-simple ul,
body.page-simple ol {
  margin: 12px 0 12px 20px;
  color: #4b5563;
}

body.page-simple li {
  margin-bottom: 8px;
  line-height: 1.8;
}

body.page-simple table {
  width: 100%;
  margin: 12px 0;
  border-collapse: collapse;
  background: white;
  font-size: 14px;
}

body.page-simple th,
body.page-simple td {
  padding: 12px;
  text-align: left;
  border: 1px solid #e5e7eb;
  vertical-align: top;
}

body.page-simple th {
  background-color: #f3f4f6;
  font-weight: 600;
}

body.page-simple tr:nth-child(even) {
  background-color: #f9fafb;
}

body.page-simple .updated-date {
  font-size: 13px;
  color: #9ca3af;
  margin-bottom: 40px;
}

body.page-simple .document-meta {
  font-size: 13px;
  color: #9ca3af;
  margin-bottom: 40px;
}

body.page-simple .document-meta p {
  color: inherit;
  line-height: 1.5;
  margin: 0 0 4px;
}

body.page-simple .introduction {
  background: #f0f9ff;
  border-left: 4px solid #0284c7;
  padding: 16px;
  margin: 20px 0 36px;
  border-radius: 4px;
}

body.page-simple .back-link {
  display: inline-block;
  margin-top: 20px;
  padding: 8px 16px;
  background-color: #f3f4f6;
  color: #0284c7;
  text-decoration: none;
  border-radius: 6px;
  transition: background-color 0.2s;
}

body.page-simple .back-link:hover {
  background-color: #e5e7eb;
}

body.page-simple section {
  margin-bottom: 32px;
}

body.page-simple .changelog-category {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #64748b;
  border-bottom: 1px solid #e2e8f0;
  padding-bottom: 6px;
  margin-top: 40px;
  margin-bottom: 20px;
}

body.page-simple .change-date {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  background: #e0f2fe;
  color: #0369a1;
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 8px;
}

body.page-simple .faq-item {
  margin-bottom: 24px;
}

body.page-simple .faq-q {
  font-size: 16px;
  font-weight: 700;
  color: #1f2937;
  margin-bottom: 8px;
  display: flex;
  gap: 8px;
}

body.page-simple .faq-q::before {
  content: "Q.";
  color: #0284c7;
  font-weight: 800;
  flex-shrink: 0;
}

body.page-simple .faq-a {
  font-size: 15px;
  color: #4b5563;
  line-height: 1.8;
  padding-left: 28px;
}

body.page-simple .faq-a ul,
body.page-simple .faq-a ol {
  margin: 8px 0 8px 20px;
}

body.page-simple .material-icons {
  font-size: 22px;
  color: #0284c7;
  vertical-align: middle;
}

/* ── Beta page variants ── */
body.page-beta .hero .container,
body.page-beta main .container,
body.page-beta .cta-bottom .container {
  max-width: 720px;
}

body.page-beta .hero {
  padding: 64px 20px 72px;
}

body.page-beta .hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,0.2);
  border-radius: 20px;
  padding: 4px 14px;
}

body.page-beta .hero h1 {
  font-size: 36px;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
}

body.page-beta .btn-join {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: white;
  color: #0284c7;
  font-size: 15px;
  font-weight: 700;
  padding: 14px 32px;
  border-radius: 12px;
  text-decoration: none;
  transition: all 0.2s;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

body.page-beta .btn-join:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.2);
}

body.page-beta main {
  padding: 56px 20px 72px;
}

body.page-beta .section {
  margin-bottom: 48px;
}

body.page-beta .section h2 {
  font-size: 22px;
  font-weight: 800;
  color: #1f2937;
  margin-bottom: 16px;
}

body.page-beta .section p {
  font-size: 15px;
  color: #374151;
}

body.page-beta .beta-copy {
  font-size: 15px;
  color: #374151;
}

body.page-beta .beta-copy-spaced {
  margin-bottom: 12px;
}

body.page-beta .steps {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

body.page-beta .step {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  text-align: left;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 20px;
}

body.page-beta .step-num {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  font-size: 16px;
  margin: 0;
}

body.page-beta .step-body h4 {
  font-size: 15px;
  font-weight: 700;
  color: #1f2937;
  margin-bottom: 4px;
}

body.page-beta .step-body p {
  font-size: 13px;
  color: #64748b;
  line-height: 1.7;
}

body.page-beta .req-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

body.page-beta .req-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: #374151;
}

body.page-beta .req-list li .material-symbols-outlined {
  font-size: 20px;
  color: #0284c7;
  flex-shrink: 0;
  margin-top: 1px;
}

body.page-beta .note {
  background: #f0f9ff;
  border: 1px solid #bae6fd;
  border-left: 4px solid #0284c7;
  border-radius: 8px;
  padding: 16px 20px;
  font-size: 13px;
  color: #0c4a6e;
  line-height: 1.7;
}

body.page-beta .cta-bottom {
  background: linear-gradient(135deg, #0284c7 0%, #0ea5e9 100%);
  color: white;
  padding: 56px 20px;
  text-align: center;
}

body.page-beta .cta-bottom h2 {
  font-size: 26px;
  font-weight: 800;
  margin-bottom: 10px;
}

body.page-beta .cta-bottom p {
  font-size: 15px;
  opacity: 0.9;
  margin-bottom: 28px;
  color: white;
}

@media (max-width: 640px) {
  body.page-simple h2 { font-size: 22px; }
  body.page-simple table { font-size: 13px; }
  body.page-simple th,
  body.page-simple td { padding: 8px; }
  body.page-beta .hero h1 { font-size: 26px; }
}