:root {
  color-scheme: light dark;
  --bg: #fafafa;
  --fg: #1a1a1e;
  --muted: #5c6370;
  --border: #e4e6eb;
  --accent: #4f46e5;
  --card: #ffffff;
  --code-bg: #f3f4f6;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0b0f;
    --fg: #f2f3f5;
    --muted: #a1a8b3;
    --border: #2a2d35;
    --accent: #7c8dff;
    --card: #14141a;
    --code-bg: #1e1f26;
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC",
    "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--fg);
  background: var(--bg);
}

.wrap {
  max-width: 820px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

header {
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

header h1 {
  margin: 0 0 8px;
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

header .meta {
  color: var(--muted);
  font-size: 0.95rem;
}

nav.legal-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  margin: 20px 0 0;
  font-size: 0.95rem;
}

nav.legal-nav a {
  color: var(--accent);
  text-decoration: none;
}

nav.legal-nav a:hover {
  text-decoration: underline;
}

.lang-switch {
  display: flex;
  gap: 8px;
  margin: 24px 0 32px;
}

.lang-switch a {
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--fg);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 600;
}

.lang-switch a.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

section.lang-block {
  display: none;
  scroll-margin-top: 24px;
}

section.lang-block.is-active {
  display: block;
}

h2 {
  margin: 40px 0 12px;
  font-size: 1.35rem;
  font-weight: 700;
}

h3 {
  margin: 28px 0 8px;
  font-size: 1.05rem;
  font-weight: 650;
}

p,
ul,
ol {
  margin: 0 0 14px;
}

ul,
ol {
  padding-left: 1.35rem;
}

li {
  margin-bottom: 6px;
}

a {
  color: var(--accent);
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0 20px;
  font-size: 0.92rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}

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

th {
  background: var(--code-bg);
  font-weight: 650;
}

tr:last-child td {
  border-bottom: none;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
  margin: 16px 0 20px;
}

.card strong {
  display: block;
  margin-bottom: 6px;
}

footer {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.875rem;
  text-align: center;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.88em;
  background: var(--code-bg);
  padding: 0.1em 0.35em;
  border-radius: 4px;
}

.feedback-form {
  margin-top: 16px;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--card);
  display: grid;
  gap: 14px;
}

.feedback-form label {
  display: grid;
  gap: 6px;
  font-size: 0.92rem;
}

.feedback-form label span {
  color: var(--muted);
  font-weight: 600;
}

.feedback-form input,
.feedback-form select,
.feedback-form textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--fg);
  font: inherit;
}

.feedback-form textarea {
  resize: vertical;
  min-height: 120px;
}

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

.feedback-form button[type="submit"] {
  appearance: none;
  border: none;
  border-radius: 8px;
  padding: 10px 18px;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 650;
  cursor: pointer;
}

.feedback-form button[type="submit"]:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.feedback-status {
  margin: 0;
  font-size: 0.9rem;
}

.feedback-status[data-kind="ok"] {
  color: #15803d;
}

.feedback-status[data-kind="error"] {
  color: #b91c1c;
}

.feedback-status[data-kind="pending"] {
  color: var(--muted);
}

@media (prefers-color-scheme: dark) {
  .feedback-status[data-kind="ok"] {
    color: #86efac;
  }
  .feedback-status[data-kind="error"] {
    color: #fca5a5;
  }
}