:root {
  --bg: #e7f5ff;
  --bg-deep: #d8efff;
  --panel: rgba(255, 255, 255, 0.88);
  --panel-strong: rgba(255, 255, 255, 0.96);
  --text: #102339;
  --muted: #4b6077;
  --line: rgba(16, 35, 57, 0.10);
  --accent: #0b7f8f;
  --accent-strong: #0d5f8d;
  --accent-soft: rgba(11, 127, 143, 0.10);
  --hero: linear-gradient(138deg, #0b4f7b 0%, #0f8ca4 46%, #7cd9ea 100%);
  --shadow: 0 22px 80px rgba(9, 24, 42, 0.10);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #071420;
    --bg-deep: #0b1d2d;
    --panel: rgba(12, 22, 33, 0.88);
    --panel-strong: rgba(14, 24, 36, 0.96);
    --text: #f4fbff;
    --muted: #b3c6d5;
    --line: rgba(255, 255, 255, 0.10);
    --accent: #68d7d0;
    --accent-strong: #91ecff;
    --accent-soft: rgba(104, 215, 208, 0.12);
    --hero: linear-gradient(138deg, #082339 0%, #0c5972 46%, #0e8ca2 100%);
    --shadow: 0 24px 80px rgba(0, 0, 0, 0.32);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Avenir Next", "Trebuchet MS", "Hiragino Sans", "Noto Sans", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 10%, rgba(125, 215, 255, 0.28), transparent 28%),
    radial-gradient(circle at 100% 0%, rgba(102, 229, 214, 0.18), transparent 26%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-deep) 100%);
}

body[data-page="privacy"] {
  background:
    radial-gradient(circle at 0% 0%, rgba(100, 206, 234, 0.18), transparent 26%),
    radial-gradient(circle at 100% 10%, rgba(122, 198, 255, 0.12), transparent 24%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-deep) 100%);
}

a {
  color: var(--accent-strong);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 28px 20px 72px;
}

.hero,
.panel,
.card,
.lang-panel {
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--panel);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow);
}

.hero {
  background: var(--hero);
  border: none;
  color: white;
  padding: 34px;
  overflow: hidden;
  position: relative;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto -8% -30% auto;
  width: 280px;
  height: 280px;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.22), transparent 62%);
  pointer-events: none;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.82rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  opacity: 0.92;
}

.eyebrow::before {
  content: "";
  width: 42px;
  height: 1px;
  background: currentColor;
  opacity: 0.5;
}

h1 {
  margin: 12px 0 10px;
  font-size: clamp(2.4rem, 5vw, 4.4rem);
  line-height: 0.98;
}

h2 {
  margin: 0 0 12px;
  font-size: 1.28rem;
  line-height: 1.18;
}

h3 {
  margin: 0 0 10px;
  font-size: 1rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--accent);
}

p,
li {
  line-height: 1.76;
}

.hero p {
  max-width: 760px;
  color: rgba(255, 255, 255, 0.92);
}

.subtitle {
  margin-top: 2px;
  font-size: 1.05rem;
  color: rgba(255, 255, 255, 0.88);
}

.hero-note {
  margin-top: 14px;
  font-size: 0.98rem;
  color: rgba(255, 255, 255, 0.80);
}

.button-row,
.nav-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button-row {
  margin-top: 22px;
}

.nav-row {
  margin-top: 18px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 18px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  border: 1px solid rgba(255, 255, 255, 0.22);
  background: rgba(255, 255, 255, 0.16);
  color: inherit;
}

.btn.secondary {
  border-color: rgba(255, 255, 255, 0.34);
  background: rgba(255, 255, 255, 0.08);
}

.btn.ghost {
  background: var(--accent-soft);
  border-color: rgba(11, 127, 143, 0.20);
  color: var(--accent-strong);
}

.panel,
.lang-panel {
  padding: 24px;
}

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

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 18px;
}

.card {
  padding: 22px;
}

.card ul,
.panel ul {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--muted);
}

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

.section-grid {
  display: grid;
  gap: 14px;
}

.lang-panel summary {
  cursor: pointer;
  list-style: none;
  font-weight: 700;
}

.lang-panel summary::-webkit-details-marker {
  display: none;
}

.lang-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
  margin-top: 16px;
}

.lang-link {
  display: block;
  padding: 10px 12px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: var(--panel-strong);
  color: var(--text);
  text-decoration: none;
}

.lang-link.current {
  border-color: rgba(11, 127, 143, 0.26);
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.kicker {
  margin-top: 6px;
  color: var(--muted);
  font-size: 0.96rem;
}

.meta {
  margin-top: 18px;
  color: var(--muted);
  font-size: 0.95rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.route-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 999px;
  background: var(--accent-soft);
  border: 1px solid rgba(11, 127, 143, 0.16);
  color: var(--accent-strong);
}

.privacy-sections {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.privacy-sections .card,
.support-grid .card {
  background: var(--panel-strong);
}

.support-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 18px;
}

@media (max-width: 720px) {
  main {
    padding: 18px 14px 56px;
  }

  .hero,
  .panel,
  .card,
  .lang-panel {
    border-radius: 22px;
  }

  .hero {
    padding: 24px;
  }

  .lang-list {
    grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
  }
}