:root {
  color-scheme: light;
  --bg: #f4f6f8;
  --card: #ffffff;
  --ink: #1f2a37;
  --muted: #52606d;
  --accent: #0f766e;
  --accent-dark: #0b5e57;
  --border: #e3e7eb;
  --shadow: 0 18px 40px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Georgia", "Times New Roman", serif;
  background: radial-gradient(circle at top left, #e8f3f1 0%, #f7f8fa 45%, #ffffff 100%);
  color: var(--ink);
}

main {
  max-width: 980px;
  margin: 48px auto 80px;
  padding: 0 24px;
}

h1,
h2,
h3 {
  margin: 0 0 12px;
  letter-spacing: -0.02em;
}

h1 {
  font-size: 2.6rem;
}

p {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.6;
}

a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

a:hover {
  text-decoration: underline;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 24px;
  box-shadow: var(--shadow);
  margin-bottom: 24px;
}

.eyebrow {
  text-transform: uppercase;
  font-size: 0.85rem;
  letter-spacing: 0.14em;
  color: #3f5a55;
  font-weight: 700;
}

.hero {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  align-items: center;
}

.hero h2 {
  font-size: 2rem;
  margin-bottom: 10px;
}

.hero-actions {
  margin-top: 20px;
}

.hero-card {
  background: #f7fbfa;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 18px;
}

.hero-list {
  margin: 12px 0 0;
  padding-left: 18px;
  color: var(--muted);
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.feature-card {
  background: #f9fbff;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 18px;
}

.ad-panel {
  background: linear-gradient(120deg, #f6f7f9 0%, #ffffff 100%);
}

.ad-panel-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  align-items: center;
}

.ad-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.ad-slot {
  border: 1px dashed #cfd6dc;
  border-radius: 16px;
  padding: 18px;
  background: #ffffff;
  min-height: 120px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.ad-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 22px;
  border-radius: 999px;
  background: #e7eef0;
  color: #4b5963;
  font-size: 0.75rem;
  font-weight: 700;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 16px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--accent);
  color: #ffffff;
  text-decoration: none;
  font-weight: 600;
  transition: background 0.2s ease, transform 0.2s ease;
}

.button:hover {
  background: var(--accent-dark);
  transform: translateY(-1px);
  text-decoration: none;
}

.button.secondary {
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
}

.button.secondary:hover {
  background: rgba(15, 118, 110, 0.08);
}

.app-page header {
  padding: 20px 24px;
  border-radius: 20px;
  background: linear-gradient(135deg, #e1f4f1 0%, #f6f2e8 50%, #ffffff 100%);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.page-title {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.page-title-text {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-title p {
  margin: 0;
}

.site-icon {
  width: clamp(56px, 8vw, 88px);
  height: auto;
  filter: drop-shadow(0 6px 12px rgba(15, 23, 42, 0.18));
}

.page-tabs {
  display: inline-flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tab-link {
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: #ffffff;
  color: var(--muted);
  font-weight: 600;
  text-decoration: none;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.tab-link[aria-current="page"] {
  background: var(--accent);
  border-color: var(--accent);
  color: #ffffff;
}

.app-toggle {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.toggle-group {
  display: inline-flex;
  gap: 8px;
  flex-wrap: wrap;
}

.toggle-button {
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: #ffffff;
  color: var(--muted);
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.toggle-button.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #ffffff;
}

.toggle-help {
  margin: 0;
  color: var(--muted);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.app-controls {
  margin-top: 16px;
}

.app-controls label {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-weight: 600;
}

.app-input-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.app-input-row input {
  flex: 1 1 280px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  font-size: 1rem;
  background: #ffffff;
}

.app-shell {
  padding: 16px;
}

.notice {
  margin-bottom: 12px;
  color: var(--muted);
  font-size: 0.98rem;
}

.helper-text {
  margin-top: 0;
  margin-bottom: 12px;
  color: var(--muted);
  font-size: 0.98rem;
}

.status-row {
  min-height: 24px;
  padding: 8px 12px;
  border-radius: 10px;
  background: #f8fafc;
  border: 1px dashed var(--border);
  color: var(--muted);
  font-weight: 600;
}

.status-row[data-tone="warning"] {
  background: #fff7ed;
  border-color: #f4d5a8;
  color: #8a4b16;
}

.status-row[data-tone="info"] {
  background: #eff6ff;
  border-color: #bfd8f6;
  color: #1d4b7a;
}

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

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.info-card {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
}

.steps,
.tips {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
}

.steps li,
.tips li {
  margin-bottom: 8px;
}

.app-frame {
  width: 100%;
  min-height: 75vh;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: #ffffff;
}

.app-embed-page {
  background: radial-gradient(circle at top left, #e8f3f1 0%, #f7f8fa 45%, #ffffff 100%);
}

.app-embed-page main {
  max-width: 1200px;
  margin: 32px auto 40px;
  padding: 0 20px;
}

.app-embed-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 16px 20px;
  border-radius: 20px;
  background: linear-gradient(135deg, #e1f4f1 0%, #f6f2e8 50%, #ffffff 100%);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  margin-bottom: 20px;
}

.app-embed-shell {
  border-radius: 20px;
  border: 1px solid var(--border);
  background: #ffffff;
  box-shadow: var(--shadow);
  padding: 16px;
}

.app-embed-note {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 0.98rem;
}

.app-embed-frame {
  width: 100%;
  min-height: 78vh;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: #ffffff;
}

@media (max-width: 768px) {
  .app-embed-page main {
    margin-top: 20px;
    padding: 0 14px;
  }
  .app-embed-frame {
    min-height: 80vh;
  }
}

.demo-layout {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) minmax(0, 2fr);
  gap: 20px;
}

.demo-controls {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.field label {
  display: block;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 6px;
}

.field input,
.field select {
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  font-size: 1rem;
  background: #ffffff;
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 999px;
  background: #f1f7f6;
  border: 1px solid #d2ebe7;
  font-weight: 600;
  color: #1f3d3a;
}

.demo-output {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.demo-kpis {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
}

.kpi {
  padding: 12px 16px;
  border-radius: 14px;
  background: #fdfcf7;
  border: 1px solid #f1e7d3;
}

.kpi-label {
  display: block;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #8a6f3c;
}

.demo-chart {
  padding: 16px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, #ffffff 0%, #f7faf9 100%);
}

.demo-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.demo-table th,
.demo-table td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
}

.demo-table th {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.8rem;
  color: var(--muted);
}

.chart-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 10px;
}

.chart-badge {
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid #d2ebe7;
  color: #1f3d3a;
  background: #eef8f6;
  font-weight: 600;
}

.demo-chart svg {
  width: 100%;
  height: 220px;
}

#demo-path {
  fill: none;
  stroke: #0f766e;
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.chart-footer {
  margin-top: 10px;
  color: var(--muted);
}

.demo-notes {
  padding: 12px 16px;
  border-radius: 12px;
  border: 1px dashed var(--border);
  color: var(--muted);
  background: #ffffff;
}

details {
  background: #ffffff;
  border-radius: 12px;
  border: 1px solid var(--border);
  padding: 14px 16px;
}

details[open] {
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.08);
}

summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--ink);
  list-style: none;
}

summary::-webkit-details-marker {
  display: none;
}

summary::after {
  content: "▾";
  float: right;
  color: var(--accent);
  transition: transform 0.2s ease;
}

details[open] summary::after {
  transform: rotate(180deg);
}

.details-body {
  margin-top: 12px;
}

@media (max-width: 900px) {
  .demo-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  main {
    margin: 32px auto 64px;
    padding: 0 18px;
  }

  h1 {
    font-size: 2.1rem;
  }

  .card {
    padding: 20px;
  }

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

  .app-page header {
    padding: 18px;
  }
}

@media (max-width: 600px) {
  main {
    margin: 24px auto 48px;
    padding: 0 16px;
  }

  h1 {
    font-size: 1.9rem;
  }

  p {
    font-size: 1rem;
  }

  .app-page header {
    flex-direction: column;
    align-items: flex-start;
  }

  .page-tabs {
    width: 100%;
  }

  .tab-link {
    flex: 1 1 auto;
    text-align: center;
  }

  .app-input-row {
    flex-direction: column;
    align-items: stretch;
  }

  .app-input-row input {
    width: 100%;
  }

  .button,
  .button.secondary {
    width: 100%;
  }

  .app-shell {
    padding: 12px;
  }

  .app-frame {
    height: 70vh;
    min-height: 420px;
  }
}

@media (max-width: 420px) {
  h1 {
    font-size: 1.7rem;
  }

  .card {
    padding: 16px;
  }

  .app-frame {
    min-height: 360px;
  }
}

code {
  background: #f1f5f9;
  padding: 2px 6px;
  border-radius: 6px;
  font-size: 0.95rem;
}

pre {
  background: #f1f5f9;
  padding: 16px;
  border-radius: 12px;
  overflow-x: auto;
  font-size: 0.95rem;
}

footer {
  margin-top: 32px;
  color: var(--muted);
  font-size: 0.95rem;
}

.layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 24px;
  align-items: start;
}

.topbar {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.topbar a {
  font-weight: 600;
}

.sidebar {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px;
  box-shadow: var(--shadow);
}

.sidebar h3 {
  font-size: 1.1rem;
  margin-bottom: 12px;
}

.sidebar a {
  display: block;
  padding: 6px 4px;
  color: var(--muted);
  font-weight: 500;
}

.sidebar a.active {
  color: var(--accent);
  font-weight: 700;
}

.doc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin: 16px 0 24px;
}

.doc-card {
  display: block;
  padding: 18px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: #ffffff;
  color: var(--ink);
  text-decoration: none;
  box-shadow: var(--shadow);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.doc-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
}

.doc-card h3 {
  margin: 0 0 6px;
}

.doc-card p {
  margin: 0 0 12px;
}

.doc-pill {
  display: inline-flex;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(15, 118, 110, 0.12);
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 600;
}

.content {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  box-shadow: var(--shadow);
}

.content ul {
  padding-left: 20px;
  color: var(--muted);
}

.content li {
  margin-bottom: 8px;
}

@media (max-width: 860px) {
  .layout {
    grid-template-columns: 1fr;
  }
}