/*
 * Visual style for the standalone privacy policy site.
 *
 * The palette leans warm and stage-like instead of generic app-landing-page defaults so the site
 * still feels connected to Aletheia's performance-tool identity while staying readable for policy
 * content.
 */
:root {
  color-scheme: light;
  --bg: #f7f1e5;
  --bg-strong: #f3ead7;
  --surface: rgba(255, 251, 244, 0.82);
  --surface-strong: rgba(255, 250, 241, 0.94);
  --border: rgba(76, 54, 31, 0.12);
  --border-strong: rgba(76, 54, 31, 0.2);
  --text: #1f1a15;
  --text-soft: #5a4d3e;
  --accent: #9e6129;
  --accent-deep: #6b3d16;
  --accent-soft: rgba(158, 97, 41, 0.12);
  --olive: #55624a;
  --shadow: 0 28px 80px rgba(61, 40, 17, 0.1);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 999px;
  --content-width: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, rgba(201, 139, 79, 0.18), transparent 34%),
    radial-gradient(circle at top right, rgba(85, 98, 74, 0.18), transparent 28%),
    linear-gradient(180deg, #fbf7f0 0%, var(--bg) 100%);
  color: var(--text);
  font-family: "Avenir Next", "PingFang SC", "Noto Sans SC", "Source Han Sans SC", sans-serif;
  line-height: 1.65;
}

a {
  color: inherit;
}

img,
svg {
  display: block;
}

.lang-en,
.lang-zh {
  display: none;
}

body[data-language="en"] .lang-en {
  display: block;
}

body[data-language="en"] .lang-en.inline {
  display: inline;
}

body[data-language="zh-CN"] .lang-zh {
  display: block;
}

body[data-language="zh-CN"] .lang-zh.inline {
  display: inline;
}

.site-shell {
  position: relative;
  z-index: 1;
  width: min(calc(100% - 32px), var(--content-width));
  margin: 0 auto;
  padding: 24px 0 40px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.topbar {
  position: sticky;
  top: 18px;
  z-index: 12;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 18px;
  margin-bottom: 22px;
  background: rgba(255, 250, 242, 0.86);
  border: 1px solid rgba(76, 54, 31, 0.1);
  border-radius: 24px;
  box-shadow: 0 18px 50px rgba(61, 40, 17, 0.08);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
}

.brand-mark {
  width: 42px;
  height: 42px;
  display: inline-grid;
  place-items: center;
  border-radius: 14px;
  background:
    linear-gradient(135deg, rgba(158, 97, 41, 0.98), rgba(107, 61, 22, 0.92));
  color: #fff9f1;
  font-family: "Iowan Old Style", "Baskerville", "Times New Roman", serif;
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.brand-copy {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.brand-copy strong {
  font-size: 1rem;
  letter-spacing: 0.04em;
}

.brand-sub {
  font-size: 0.8rem;
  color: var(--text-soft);
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.ghost-link,
.toc a,
.chip-link,
.footer-link {
  transition:
    transform 180ms ease,
    background-color 180ms ease,
    border-color 180ms ease,
    color 180ms ease;
}

.ghost-link {
  text-decoration: none;
  padding: 10px 14px;
  border: 1px solid rgba(76, 54, 31, 0.12);
  border-radius: var(--radius-sm);
  color: var(--accent-deep);
  background: rgba(255, 252, 246, 0.8);
}

.ghost-link:hover,
.ghost-link:focus-visible,
.chip-link:hover,
.chip-link:focus-visible,
.toc a:hover,
.toc a:focus-visible,
.footer-link:hover,
.footer-link:focus-visible {
  transform: translateY(-1px);
  background: rgba(255, 248, 236, 0.96);
  border-color: rgba(158, 97, 41, 0.24);
}

.language-switch {
  display: inline-flex;
  align-items: center;
  padding: 4px;
  gap: 4px;
  border-radius: var(--radius-sm);
  background: rgba(113, 81, 51, 0.08);
}

.language-switch button {
  border: 0;
  background: transparent;
  color: var(--text-soft);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font: inherit;
  cursor: pointer;
}

.language-switch button.is-active {
  background: linear-gradient(135deg, rgba(158, 97, 41, 0.94), rgba(107, 61, 22, 0.92));
  color: #fffaf4;
  box-shadow: 0 10px 24px rgba(107, 61, 22, 0.2);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(300px, 0.9fr);
  gap: 24px;
  padding: 32px;
  margin-bottom: 22px;
  overflow: hidden;
}

.eyebrow {
  margin: 0 0 14px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.76rem;
  color: var(--accent);
  font-weight: 700;
}

.hero h1 {
  margin: 0;
  font-family: "Iowan Old Style", "Baskerville", "Times New Roman", serif;
  font-size: clamp(2.3rem, 4vw, 4.1rem);
  line-height: 1.02;
  letter-spacing: -0.03em;
  max-width: 12ch;
}

.hero p {
  margin: 0;
}

.lede {
  margin-top: 18px;
  max-width: 64ch;
  color: var(--text-soft);
  font-size: 1.02rem;
}

.hero-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 22px;
}

.meta-item {
  padding: 14px 16px;
  border-radius: var(--radius-lg);
  background: var(--surface-strong);
  border: 1px solid var(--border);
}

.meta-label {
  display: block;
  margin-bottom: 6px;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-soft);
}

.meta-value {
  font-size: 0.98rem;
  color: var(--text);
  word-break: break-word;
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.chip-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  padding: 11px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(76, 54, 31, 0.12);
  background: rgba(255, 252, 246, 0.9);
  color: var(--text);
}

.hero-side {
  display: flex;
}

.spotlight {
  width: 100%;
  display: grid;
  gap: 14px;
  padding: 18px;
  border-radius: var(--radius-xl);
  background:
    radial-gradient(circle at top right, rgba(158, 97, 41, 0.18), transparent 42%),
    linear-gradient(180deg, rgba(255, 250, 241, 0.96), rgba(245, 236, 221, 0.95));
  border: 1px solid rgba(76, 54, 31, 0.12);
}

.spotlight-card {
  padding: 16px;
  border-radius: var(--radius-lg);
  background: rgba(255, 251, 245, 0.82);
  border: 1px solid rgba(76, 54, 31, 0.08);
}

.spotlight-card strong {
  display: block;
  margin-bottom: 6px;
  font-size: 0.95rem;
}

.spotlight-card p {
  margin: 0;
  color: var(--text-soft);
}

.fact-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 22px;
}

.fact-card {
  padding: 18px;
}

.fact-card .fact-index {
  display: inline-block;
  margin-bottom: 10px;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--accent);
  font-weight: 700;
}

.fact-card h3 {
  margin: 0 0 8px;
  font-size: 1.02rem;
}

.fact-card p {
  margin: 0;
  color: var(--text-soft);
}

.content-layout {
  display: grid;
  grid-template-columns: minmax(0, 280px) minmax(0, 1fr);
  gap: 22px;
}

.toc {
  position: sticky;
  top: 106px;
  align-self: start;
  padding: 18px;
}

.toc-title {
  margin: 0 0 12px;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-soft);
  font-weight: 700;
}

.toc nav {
  display: grid;
  gap: 8px;
}

.toc a {
  text-decoration: none;
  color: var(--text);
  padding: 10px 12px;
  border-radius: 14px;
  background: rgba(255, 252, 246, 0.82);
  border: 1px solid rgba(76, 54, 31, 0.08);
}

.policy-stack {
  display: grid;
  gap: 18px;
}

.policy-section {
  padding: 24px;
}

.section-heading {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 16px;
}

.section-index {
  flex: 0 0 auto;
  color: var(--accent);
  font-size: 0.84rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 700;
}

.policy-section h2 {
  margin: 0;
  font-size: 1.4rem;
  font-family: "Iowan Old Style", "Baskerville", "Times New Roman", serif;
}

.policy-section p,
.policy-section li {
  color: var(--text-soft);
}

.policy-section p:last-child,
.policy-section ul:last-child,
.policy-section ol:last-child {
  margin-bottom: 0;
}

.policy-section ul,
.policy-section ol {
  margin: 14px 0 0;
  padding-left: 20px;
}

.policy-section li + li {
  margin-top: 8px;
}

.policy-grid {
  display: grid;
  gap: 12px;
}

.permission-grid,
.share-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.mini-card {
  padding: 16px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(76, 54, 31, 0.1);
  background: rgba(255, 252, 246, 0.82);
}

.mini-card h3 {
  margin: 0 0 8px;
  font-size: 1rem;
}

.mini-card p {
  margin: 0;
}

.callout {
  margin-top: 16px;
  padding: 16px 18px;
  border-left: 4px solid var(--accent);
  border-radius: 18px;
  background: rgba(158, 97, 41, 0.08);
}

.footer {
  margin-top: 22px;
  padding: 20px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.footer p {
  margin: 6px 0 0;
  color: var(--text-soft);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.footer-link {
  text-decoration: none;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(76, 54, 31, 0.12);
  background: rgba(255, 252, 246, 0.82);
}

[hidden] {
  display: none !important;
}

@media (max-width: 1080px) {
  .hero,
  .content-layout {
    grid-template-columns: 1fr;
  }

  .fact-grid,
  .hero-meta,
  .permission-grid,
  .share-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .toc {
    position: static;
  }

  .hero h1 {
    max-width: none;
  }
}

@media (max-width: 720px) {
  .site-shell {
    width: min(calc(100% - 20px), var(--content-width));
    padding-top: 14px;
  }

  .topbar,
  .footer {
    flex-direction: column;
    align-items: stretch;
  }

  .topbar-actions {
    justify-content: space-between;
    flex-wrap: wrap;
  }

  .hero,
  .policy-section {
    padding: 20px;
  }

  .fact-grid,
  .hero-meta,
  .permission-grid,
  .share-grid {
    grid-template-columns: 1fr;
  }

  .language-switch {
    width: 100%;
    justify-content: space-between;
  }

  .language-switch button {
    flex: 1 1 0;
  }
}