:root {
  --bg: #faf7f2;
  --surface: #ffffff;
  --surface-2: #f2ede4;
  --text: #1d1a16;
  --muted: #6b645a;
  --line: #e4ddd1;
  --accent: #d6402b;
  --accent-ink: #ffffff;
  --good: #1f8a4c;
  --gold: #b7791f;
  --radius: 14px;
  --shadow: 0 1px 2px rgb(0 0 0 / 0.05), 0 6px 20px rgb(0 0 0 / 0.05);
  --robot-body: #ffffff;
  --robot-face: #1d1a16;
  --mono: "JetBrains Mono", ui-monospace, Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #14120f;
    --surface: #1d1a16;
    --surface-2: #26221d;
    --text: #f2ede4;
    --muted: #a59d90;
    --line: #353028;
    --accent: #ff6a4d;
    --accent-ink: #1a0c08;
    --good: #4cc584;
    --gold: #e7b04f;
    --shadow: none;
    --robot-body: #26221d;
    --robot-face: #0b0a08;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #14120f;
  --surface: #1d1a16;
  --surface-2: #26221d;
  --text: #f2ede4;
  --muted: #a59d90;
  --line: #353028;
  --accent: #ff6a4d;
  --accent-ink: #1a0c08;
  --good: #4cc584;
  --gold: #e7b04f;
  --shadow: none;
  --robot-body: #26221d;
  --robot-face: #0b0a08;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--accent); }
img { max-width: 100%; }
h1, h2, h3 { line-height: 1.25; margin: 0 0 .5em; }
h2 { font-size: 1.35rem; }
.muted { color: var(--muted); }
.small { font-size: .875rem; }
.num { font-variant-numeric: tabular-nums; }

.wrap { max-width: 980px; margin: 0 auto; padding: 0 16px; }
.prose { max-width: 720px; }
section { margin: 40px 0; }

.topbar {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 10px 16px;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.brand { font-weight: 800; color: var(--text); text-decoration: none; white-space: nowrap; }
.topbar nav { display: flex; gap: 14px; overflow-x: auto; scrollbar-width: none; }
.topbar nav a { color: var(--muted); text-decoration: none; font-size: .925rem; white-space: nowrap; }
.topbar nav a:hover { color: var(--text); }

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
}
.grid { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 10px 16px; border-radius: 999px; border: 0;
  background: var(--accent); color: var(--accent-ink);
  font: inherit; font-weight: 700; text-decoration: none; cursor: pointer;
}
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn.small { padding: 6px 10px; font-size: .85rem; }
.btn.ghost { background: var(--surface-2); color: var(--text); }
.btn.good { background: var(--good); color: #fff; }

input, textarea, select {
  width: 100%; font: inherit; color: var(--text);
  background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px;
}
label { display: block; font-size: .9rem; color: var(--muted); margin: 10px 0 4px; }

/* Hero + đồng hồ sinh mệnh */
.hero { padding: 36px 0 8px; }
.eyebrow { font-size: .8rem; letter-spacing: .12em; text-transform: uppercase; color: var(--accent); font-weight: 700; }
.hero h1 { font-size: clamp(1.7rem, 5vw, 2.6rem); margin-top: 6px; }
.hero p { color: var(--muted); max-width: 680px; }

.lifeclock { text-align: center; padding: 26px 16px; position: relative; overflow: hidden; }
.lifeclock .label { font-weight: 700; color: var(--muted); font-size: .9rem; }
.clock { display: flex; justify-content: center; gap: clamp(6px, 2vw, 18px); margin: 10px 0; }
.clock div { min-width: 0; }
.clock b { display: block; font-size: clamp(2rem, 9vw, 4rem); line-height: 1; font-variant-numeric: tabular-nums; color: var(--accent); }
.clock span { font-size: .8rem; color: var(--muted); }
.lifeclock.dead .clock b { color: var(--muted); }
.toast-zone { position: absolute; inset: 0; pointer-events: none; }
.plus {
  position: absolute; left: 50%; top: 55%;
  transform: translateX(-50%);
  background: var(--good); color: #fff; font-weight: 800;
  padding: 6px 14px; border-radius: 999px; white-space: nowrap; max-width: 92%; overflow: hidden; text-overflow: ellipsis;
  animation: floatup 3.2s ease-out forwards;
}
@keyframes floatup {
  0% { opacity: 0; transform: translate(-50%, 20px); }
  15% { opacity: 1; transform: translate(-50%, 0); }
  80% { opacity: 1; }
  100% { opacity: 0; transform: translate(-50%, -70px); }
}
@media (prefers-reduced-motion: reduce) { .plus { animation-duration: .01s; animation-iteration-count: 1; } }

.stat .k { font-size: .82rem; color: var(--muted); font-weight: 600; }
.stat .v { font-size: 1.6rem; font-weight: 800; font-variant-numeric: tabular-nums; }
.stat .n { font-size: .8rem; color: var(--muted); margin-top: 4px; }
.stat.hl { border-color: var(--accent); }


.feed { list-style: none; margin: 0; padding: 0; }
.feed li { display: flex; gap: 10px; padding: 10px 0; border-bottom: 1px solid var(--line); }
.feed li:last-child { border-bottom: 0; }
.feed .ico { flex: 0 0 auto; }
.feed .t { flex: 1; min-width: 0; overflow-wrap: anywhere; }
.feed .m { color: var(--good); font-weight: 700; white-space: nowrap; }

.rules { margin: 0; padding-left: 20px; }
.rules li { margin: 6px 0; }

.diary-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.diary-list a { display: block; text-decoration: none; color: inherit; }
.diary-list .card:hover { border-color: var(--accent); }

.qr { display: block; width: 240px; max-width: 100%; margin: 12px auto; background: #fff; border-radius: 10px; }
.code-pill { font-family: ui-monospace, Consolas, monospace; background: var(--surface-2); padding: 2px 8px; border-radius: 6px; font-weight: 700; }

.social { display: flex; flex-wrap: wrap; gap: 8px; }

.ad-slot { margin: 28px 0; min-height: 90px; }

.footer { padding: 16px 16px 20px; color: var(--muted); font-size: .82rem; line-height: 1.5; border-top: 1px solid var(--line); margin-top: 28px; }
.footer p { margin: 4px 0; }
.footer a { color: var(--muted); }
.footer a:hover { color: var(--text); }

/* Hỏi đáp */
.qa-msg { padding: 14px 16px; border-radius: var(--radius); margin: 12px 0; border: 1px solid var(--line); background: var(--surface); }
.qa-user { background: var(--surface-2); }
.qa-who { font-size: .8rem; font-weight: 700; color: var(--muted); margin-bottom: 4px; }
.cta { margin-top: 28px; }


@media (max-width: 420px) {
  .brand { font-size: .9rem; }
  .topbar nav { gap: 10px; }
  .topbar nav a { font-size: .85rem; }
}