:root {
  color-scheme: light dark;
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-muted: #f1f5f9;
  --text: #0f172a;
  --muted: #475569;
  --muted-strong: #1e293b;
  --border: rgba(148, 163, 184, 0.35);
  --accent: #2563eb;
  --accent-strong: #1d4ed8;
  --accent-soft: rgba(37, 99, 235, 0.14);
  --shadow: 0 18px 35px rgba(15, 23, 42, 0.15);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #020817;
    --surface: #0f172a;
    --surface-muted: #111c2f;
    --text: #e2e8f0;
    --muted: #cbd5f5;
    --muted-strong: #f8fafc;
    --border: rgba(148, 163, 184, 0.18);
    --accent: #60a5fa;
    --accent-strong: #3b82f6;
    --accent-soft: rgba(96, 165, 250, 0.22);
    --shadow: 0 14px 28px rgba(3, 14, 37, 0.55);
  }
}

:root[data-theme='light'] {
  color-scheme: light;
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-muted: #f1f5f9;
  --text: #0f172a;
  --muted: #475569;
  --muted-strong: #1e293b;
  --border: rgba(148, 163, 184, 0.35);
  --accent: #2563eb;
  --accent-strong: #1d4ed8;
  --accent-soft: rgba(37, 99, 235, 0.14);
  --shadow: 0 18px 35px rgba(15, 23, 42, 0.15);
}

:root[data-theme='dark'] {
  color-scheme: dark;
  --bg: #020817;
  --surface: #0f172a;
  --surface-muted: #111c2f;
  --text: #e2e8f0;
  --muted: #cbd5f5;
  --muted-strong: #f8fafc;
  --border: rgba(148, 163, 184, 0.18);
  --accent: #60a5fa;
  --accent-strong: #3b82f6;
  --accent-soft: rgba(96, 165, 250, 0.22);
  --shadow: 0 14px 28px rgba(3, 14, 37, 0.55);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Arial, sans-serif;
  line-height: 1.65;
  background: var(--bg);
  color: var(--text);
}

a {
  color: inherit;
  text-decoration: none;
}

a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 6px;
}

.container {
  width: min(1120px, 100%);
  margin: 0 auto;
  padding: 0 24px;
}

main {
  flex: 1;
  padding: 24px 0 96px;
}

section + section {
  margin-top: 72px;
}

.hero {
  display: grid;
  gap: 48px;
  align-items: center;
  padding: 96px 0 48px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  text-transform: uppercase;
  font-weight: 600;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--muted);
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface-muted);
  margin-bottom: 18px;
}

.hero h1 {
  font-size: clamp(2.1rem, 4vw, 3.2rem);
  line-height: 1.1;
  margin: 0 0 18px;
  color: var(--muted-strong);
}

.hero p {
  margin: 0 0 28px;
  color: var(--muted);
  max-width: 60ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.hero-actions a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-weight: 600;
  padding: 12px 22px;
  border-radius: 999px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.hero-actions a.primary {
  background: var(--accent);
  color: #ffffff;
  box-shadow: var(--shadow);
}

.hero-actions a.primary:hover {
  background: var(--accent-strong);
  transform: translateY(-1px);
}

.hero-actions a.secondary {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
}

.hero-actions a.secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}

.hero-highlight {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 28px 30px;
  box-shadow: var(--shadow);
}

.hero-highlight h2 {
  margin: 0 0 12px;
  font-size: 1.25rem;
  color: var(--muted-strong);
}

.hero-highlight ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  display: grid;
  gap: 10px;
}

.content-section {
  display: grid;
  gap: 28px;
}

.feature-list {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
  display: grid;
  gap: 12px;
}

.feature-list li {
  line-height: 1.6;
}

.feature-list strong {
  color: var(--muted-strong);
}

.feature-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 28px 32px;
  box-shadow: var(--shadow);
  display: grid;
  gap: 20px;
}

.section-header {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: baseline;
  justify-content: space-between;
}

.section-header h2 {
  margin: 0;
  font-size: 1.8rem;
  color: var(--muted-strong);
}

.section-header p {
  margin: 0;
  color: var(--muted);
  max-width: 60ch;
}

.card-grid {
  display: grid;
  gap: 22px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card {
  display: flex;
  flex-direction: column;
  gap: 14px;
  background: var(--surface);
  border-radius: 18px;
  border: 1px solid var(--border);
  padding: 24px;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  min-height: 220px;
}

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

.card-tag {
  display: inline-flex;
  align-items: center;
  width: max-content;
  padding: 4px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  background: var(--surface-muted);
}

.card h3 {
  margin: 0;
  font-size: 1.25rem;
  color: var(--muted-strong);
}

.card p {
  margin: 0;
  color: var(--muted);
}

.card-link {
  margin-top: auto;
  font-weight: 600;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.resource-grid {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.resource-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 26px;
  display: grid;
  gap: 16px;
  min-height: 200px;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.resource-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
  box-shadow: var(--shadow);
}

.resource-card h3 {
  margin: 0;
  font-size: 1.2rem;
  color: var(--muted-strong);
}

.resource-card p {
  margin: 0;
  color: var(--muted);
}

.resource-list {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  display: grid;
  gap: 8px;
}

.store-button {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  border-radius: 14px;
  background: var(--accent);
  color: #ffffff;
  font-weight: 600;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
  box-shadow: var(--shadow);
  width: max-content;
}

.store-button:hover {
  background: var(--accent-strong);
  transform: translateY(-1px);
}

.store-button svg {
  width: 28px;
  height: 28px;
}

.store-note {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

footer {
  margin-top: 96px;
  border-top: 1px solid var(--border);
  background: var(--surface);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 32px 24px 48px;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 0.95rem;
}

.footer-nav a {
  color: var(--muted);
}

.footer-note {
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 640px) {
  .hero {
    padding: 72px 0 36px;
  }
}

/* Guide layouts */
.guide-main {
  max-width: 720px;
  margin: 0 auto;
  padding: 72px 24px 96px;
}

.guide-main p {
  margin-top: 0;
  margin-bottom: 16px;
}

.guide-main h1,
.guide-main h2 {
  color: var(--muted-strong);
}

.guide-main label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
}

.guide-main input[type="text"] {
  width: 100%;
  max-width: 420px;
  padding: 10px 12px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 1rem;
  font-family: inherit;
  margin-bottom: 24px;
}

.guide-main .token-note {
  margin-top: -12px;
  margin-bottom: 24px;
  color: var(--muted);
  font-size: 0.95rem;
}

.guide-main nav.toc {
  margin: 32px 0;
  padding: 16px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.guide-main nav.toc h2 {
  margin-top: 0;
  font-size: 1.1rem;
}

.guide-main nav.toc ol {
  margin: 12px 0 0;
  padding-left: 20px;
}

.guide-main nav.toc a,
.guide-main a {
  color: var(--accent-strong);
  text-decoration: none;
}

.guide-main .snippet {
  position: relative;
  margin: 24px 0;
}

.guide-main pre {
  background: #1f2933;
  color: #f8fafc;
  padding: 44px 16px 16px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 0;
}

.guide-main code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.95rem;
  white-space: pre;
  display: block;
}

.guide-main .copy-btn {
  position: absolute;
  top: 12px;
  right: 16px;
  padding: 6px 14px;
  font-size: 0.85rem;
  border: none;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.88);
  color: #f8fafc;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.1s ease;
}

.guide-main .copy-btn:hover,
.guide-main .copy-btn:focus {
  background: rgba(15, 23, 42, 0.72);
}

.guide-main .copy-btn:active {
  transform: translateY(1px);
  background: rgba(15, 23, 42, 0.62);
}

.guide-main .quick-start-illustration {
  margin: 24px auto;
  max-width: 320px;
  text-align: center;
}

.guide-main .quick-start-illustration img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.08);
}

.guide-main .quick-start-illustration figcaption {
  margin-top: 12px;
  font-size: 0.95rem;
  color: #4b5563;
}

@media (max-width: 960px) {
  .guide-main {
    padding: 56px 20px 80px;
  }
}

@media (prefers-color-scheme: dark) {
  .guide-main nav.toc {
    background: var(--surface-muted, #111c32);
    border-color: var(--border, #1e293b);
  }

  .guide-main nav.toc a,
  .guide-main a {
    color: var(--accent, #93c5fd);
  }

  .guide-main input[type="text"] {
    background: var(--surface-muted, #14213d);
    border-color: var(--border, #334155);
    color: var(--text, #e2e8f0);
  }

  .guide-main input[type="text"]::placeholder {
    color: #94a3b8;
  }

  .guide-main .token-note {
    color: var(--muted, #cbd5f5);
  }

  .guide-main .copy-btn {
    background: rgba(148, 163, 184, 0.16);
    color: #e2e8f0;
  }

  .guide-main .copy-btn:hover,
  .guide-main .copy-btn:focus {
    background: rgba(148, 163, 184, 0.32);
  }

  .guide-main .copy-btn:active {
    background: rgba(148, 163, 184, 0.48);
  }

  .guide-main .quick-start-illustration img {
    box-shadow: 0 12px 24px rgba(15, 23, 42, 0.56);
  }

  .guide-main .quick-start-illustration figcaption {
    color: #cbd5f5;
  }
}