/* Trang tĩnh, một file CSS, không build, không CDN.
   Nó tồn tại để Google Play và App Review mở được — không phải để đẹp. */

:root {
  --ink: #16161a;
  --sub: #55555f;
  --faint: #8a8a95;
  --line: #e6e6ec;
  --bg: #ffffff;
  --card: #f7f7fa;
  --brand: #6c4df6;
  --warn-bg: #fff6e8;
  --warn-line: #f0c98a;
  --yes: #b8541f;
  --no: #2f7a55;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #f0f0f4;
    --sub: #a8a8b4;
    --faint: #74747f;
    --line: #2c2c34;
    --bg: #121216;
    --card: #1b1b21;
    --brand: #a78bfa;
    --warn-bg: #2a2113;
    --warn-line: #6b5326;
    --yes: #e8a06a;
    --no: #6ec49a;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
        "Helvetica Neue", Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 40px 20px 80px;
}

h1 { font-size: 30px; line-height: 1.25; margin: 0 0 8px; letter-spacing: -0.5px; }
h2 { font-size: 20px; margin: 40px 0 12px; letter-spacing: -0.2px; }
h3 { font-size: 16px; margin: 26px 0 8px; }

p { margin: 0 0 14px; }
ul { margin: 0 0 14px; padding-left: 22px; }
li { margin-bottom: 7px; }

a { color: var(--brand); text-decoration: underline; text-underline-offset: 2px; }

code {
  background: var(--card);
  padding: 2px 6px;
  border-radius: 5px;
  font-size: 13.5px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

.back { margin-bottom: 28px; font-size: 14px; }
.back a { color: var(--sub); text-decoration: none; }

.meta { color: var(--faint); font-size: 13.5px; }

.lead { font-size: 18px; line-height: 1.55; margin-top: 26px; }

.note, .warn {
  padding: 14px 16px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--card);
  font-size: 14.5px;
  margin: 18px 0;
}
.warn { background: var(--warn-bg); border-color: var(--warn-line); }

.apis { list-style: none; padding-left: 0; }
.apis li { margin-bottom: 6px; }

table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0 22px;
  font-size: 14.5px;
}
th, td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
th { font-weight: 700; color: var(--sub); font-size: 13px; text-transform: uppercase; letter-spacing: 0.4px; }
td.yes { color: var(--yes); font-weight: 600; }
td.no { color: var(--no); font-weight: 600; }

hr { border: 0; border-top: 1px solid var(--line); margin: 44px 0 20px; }

/* index */
.hero { padding: 24px 0 8px; }
.hero h1 { font-size: 40px; }
.tag { color: var(--sub); font-size: 18px; margin-bottom: 28px; }
.links { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 8px; }
.links a {
  padding: 10px 18px;
  border: 1px solid var(--line);
  border-radius: 10px;
  text-decoration: none;
  color: var(--ink);
  font-weight: 600;
  font-size: 15px;
}