:root {
      --bg: #f5f8fc;
      --surface: #ffffff;
      --text: #0f1c2d;
      --muted: #56657a;
      --border: #e1e8f0;
      --accent: #1a8fd6;
      --accent-soft: #e6f4fc;
      --good: #148a57;
      color-scheme: light;
    }
    @media (prefers-color-scheme: dark) {
      :root:not([data-theme="light"]) {
        --bg: #0a121f;
        --surface: #111c2d;
        --text: #e6edf7;
        --muted: #93a3ba;
        --border: #1f2d44;
        --accent: #4cc3f0;
        --accent-soft: #11283d;
        --good: #3fd796;
        color-scheme: dark;
      }
    }
    :root[data-theme="dark"] {
      --bg: #0a121f;
      --surface: #111c2d;
      --text: #e6edf7;
      --muted: #93a3ba;
      --border: #1f2d44;
      --accent: #4cc3f0;
      --accent-soft: #11283d;
      --good: #3fd796;
      color-scheme: dark;
    }
    * { box-sizing: border-box; }
    html { -webkit-text-size-adjust: 100%; }
    body {
      margin: 0;
      background: var(--bg);
      color: var(--text);
      font: 16px/1.65 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;
      -webkit-font-smoothing: antialiased;
    }
    .wrap { max-width: 760px; margin: 0 auto; padding: 32px 16px 64px; }
    header { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 28px; }
    .brand { display: flex; align-items: center; gap: 12px; }
    .brand svg { flex: none; border-radius: 11px; }
    .brand-name { font-weight: 700; font-size: 17px; }
    .brand-sub { color: var(--muted); font-size: 13px; }
    .lang { display: flex; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 3px; }
    .lang button {
      border: 0; background: transparent; color: var(--muted); font: inherit; font-size: 14px; font-weight: 600;
      padding: 5px 12px; border-radius: 7px; cursor: pointer;
    }
    .lang button[aria-pressed="true"] { background: var(--text); color: var(--bg); }
    h1 { font-size: 34px; line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 8px; }
    h2 { font-size: 21px; letter-spacing: -0.01em; margin: 40px 0 10px; scroll-margin-top: 16px; }
    h3 { font-size: 16px; margin: 22px 0 4px; }
    p, ul { margin: 0 0 12px; }
    ul { padding-left: 22px; }
    li { margin-bottom: 6px; }
    a { color: var(--accent); }
    .meta { color: var(--muted); font-size: 14px; margin-bottom: 24px; }
    .glance {
      display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin: 24px 0 8px;
    }
    .glance div {
      background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 14px 16px; font-size: 14.5px;
    }
    .glance b { display: block; font-size: 15px; margin-bottom: 2px; }
    .glance b::before { content: "✓"; color: var(--good); margin-right: 8px; }
    .card {
      background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 4px 18px 8px; margin: 12px 0;
    }
    .toc { background: var(--accent-soft); border-radius: 14px; padding: 14px 18px; margin: 20px 0; font-size: 15px; }
    .toc ol { margin: 6px 0 0; padding-left: 20px; columns: 2; column-gap: 24px; }
    .toc li { margin-bottom: 3px; break-inside: avoid; }
    .toc a { text-decoration: none; }
    table { width: 100%; border-collapse: collapse; font-size: 14.5px; margin: 8px 0 14px; }
    th, td { text-align: left; vertical-align: top; padding: 10px 10px 10px 0; border-bottom: 1px solid var(--border); }
    th { color: var(--muted); font-weight: 600; font-size: 13px; }
    td:first-child { font-weight: 600; white-space: nowrap; }
    footer { margin-top: 48px; color: var(--muted); font-size: 13.5px; border-top: 1px solid var(--border); padding-top: 16px; }
    [data-lang] { display: none; }
    html[lang="en"] [data-lang="en"], html[lang="tr"] [data-lang="tr"] { display: block; }
    @media (max-width: 560px) {
      h1 { font-size: 28px; }
      .glance { grid-template-columns: 1fr; }
      .toc ol { columns: 1; }
      table, thead, tbody, tr, th, td { display: block; }
      thead { display: none; }
      td { border: 0; padding: 2px 0; }
      td:first-child { padding-top: 12px; white-space: normal; }
      tr { border-bottom: 1px solid var(--border); padding-bottom: 10px; }
    }

/* Landing page cards */
.pick { display: grid; gap: 12px; margin-top: 24px; }
.pick a {
  display: block; background: var(--surface); border: 1px solid var(--border); border-radius: 14px;
  padding: 18px 20px; text-decoration: none; color: inherit;
}
.pick a:hover { border-color: var(--accent); }
.pick b { display: block; font-size: 17px; margin-bottom: 2px; }
.pick span { color: var(--muted); font-size: 14.5px; }
.back { display: inline-block; margin-bottom: 18px; font-size: 14px; text-decoration: none; }

/* Support page */
.contact {
  display: block; background: var(--accent-soft); border: 1px solid var(--border); border-radius: 14px;
  padding: 20px; margin: 8px 0 12px;
}
.contact b { display: block; font-size: 15px; color: var(--muted); margin-bottom: 4px; }
.contact-mail { display: inline-block; font-size: 22px; font-weight: 700; word-break: break-all; margin-bottom: 14px; }
.contact-button {
  display: block; width: fit-content; background: var(--accent); color: #fff; font-weight: 600;
  padding: 10px 18px; border-radius: 10px; text-decoration: none; margin-bottom: 14px;
}
.contact span { display: block; color: var(--muted); font-size: 14px; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .contact-button { color: #0a121f; }
}
:root[data-theme="dark"] .contact-button { color: #0a121f; }