:root {
  --bg: #f7f5f2;
  --surface: #ffffff;
  --surface-2: #f1eee9;
  --text: #1f1b16;
  --muted: #6b6259;
  --border: #e4ded6;
  --accent: #e8601c;
  --accent-ink: #ffffff;
  --accent-soft: #fdebdf;
  --danger: #c4321f;
  --danger-soft: #fbe4e0;
  --warn: #a86400;
  --warn-soft: #fbefd9;
  --ok: #2f7a3e;
  --ok-soft: #e2f1e5;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(31, 27, 22, 0.06), 0 2px 8px rgba(31, 27, 22, 0.04);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17140f;
    --surface: #211d18;
    --surface-2: #2a251f;
    --text: #f1ece5;
    --muted: #a99f93;
    --border: #3a332b;
    --accent: #f27a3a;
    --accent-ink: #1b120b;
    --accent-soft: #3a2416;
    --danger: #f0735f;
    --danger-soft: #3d1d18;
    --warn: #e6a94a;
    --warn-soft: #3a2b14;
    --ok: #6cc07d;
    --ok-soft: #1c3221;
    --shadow: none;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

h1, h2, h3 { margin: 0; line-height: 1.25; }
h1 { font-size: 22px; font-weight: 700; }
h2 { font-size: 16px; font-weight: 650; }
h3 { font-size: 14px; font-weight: 650; }
p { margin: 0; }
a { color: var(--accent); }

.muted { color: var(--muted); }
.small { font-size: 12.5px; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
}

.stack > * + * { margin-top: 12px; }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.spacer { flex: 1; }

button, .btn {
  font: inherit;
  font-weight: 600;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  padding: 8px 14px;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}
button:hover, .btn:hover { background: var(--surface-2); }
button.primary, .btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
button.primary:hover, .btn.primary:hover { filter: brightness(1.05); background: var(--accent); }
button:disabled { opacity: 0.55; cursor: not-allowed; }
button.link { border: none; background: none; color: var(--accent); padding: 0; font-weight: 600; }

input[type="text"], input[type="password"], input[type="number"], select, textarea {
  font: inherit;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
  width: 100%;
}
input:focus, select:focus, textarea:focus, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
textarea { resize: vertical; min-height: 70px; }
label { font-weight: 600; display: block; margin-bottom: 4px; }

.badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 650;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--muted);
  white-space: nowrap;
}
.badge.cao, .badge.danger { background: var(--danger-soft); color: var(--danger); }
.badge.trung_binh, .badge.warn { background: var(--warn-soft); color: var(--warn); }
.badge.thap, .badge.ok { background: var(--ok-soft); color: var(--ok); }

.notice { border-radius: 8px; padding: 10px 12px; font-size: 13px; }
.notice.error { background: var(--danger-soft); color: var(--danger); }
.notice.warn { background: var(--warn-soft); color: var(--warn); }
.notice.ok { background: var(--ok-soft); color: var(--ok); }
.notice.info { background: var(--surface-2); color: var(--muted); }

.brand { display: flex; align-items: center; gap: 10px; }
.brand img { width: 28px; height: 28px; border-radius: 7px; }

.spinner {
  width: 14px; height: 14px; border-radius: 50%;
  border: 2px solid var(--accent-soft); border-top-color: var(--accent);
  animation: spin 0.8s linear infinite; display: inline-block; flex: none;
}
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .spinner { animation-duration: 2.4s; } }

/* ---------- Riêng cho app VPS ---------- */
main { max-width: 1040px; margin: 0 auto; padding: 16px 16px 64px; }
.topbar { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; padding-bottom: 4px; }
.topbar nav { display: flex; gap: 4px; }
.topbar nav a { text-decoration: none; color: var(--muted); font-weight: 600; padding: 6px 10px; border-radius: 8px; }
.topbar nav a.active { background: var(--accent-soft); color: var(--accent); }
.login { max-width: 360px; margin: 12vh auto 0; }
.kpis { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.kpi .num { font-size: 28px; font-weight: 700; font-variant-numeric: tabular-nums; }
.kpi.alert .num { color: var(--danger); }
.kpi.warn .num { color: var(--warn); }
.page-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(290px, 1fr)); gap: 12px; }
a.page-card { display: block; color: inherit; text-decoration: none; }
a.page-card:hover { border-color: var(--accent); }
.page-card .summary { display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; margin-top: 6px; font-size: 13.5px; }
.chips { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 8px; }
section > h2 { margin-bottom: 10px; display: flex; align-items: center; gap: 8px; }
.count { font-size: 13px; color: var(--muted); font-weight: 500; }
.issue { border-top: 1px solid var(--border); padding: 14px 0; }
.issue:first-of-type { border-top: none; padding-top: 0; }
.issue-head { display: grid; grid-template-columns: 1fr auto; gap: 10px; align-items: start; }
.bar { height: 6px; border-radius: 3px; background: var(--surface-2); margin: 8px 0; overflow: hidden; }
.bar > span { display: block; height: 100%; background: var(--accent); border-radius: 3px; }
blockquote { margin: 6px 0; padding: 4px 10px; border-left: 3px solid var(--border); color: var(--muted); font-style: italic; }
.suggest { background: var(--accent-soft); border-radius: 8px; padding: 8px 10px; margin-top: 8px; font-size: 13.5px; }
.refs { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 8px; }
.refs a { font-size: 12px; text-decoration: none; padding: 1px 7px; border: 1px solid var(--border); border-radius: 999px; color: var(--muted); }
.refs a:hover { color: var(--accent); border-color: var(--accent); }
.urgent { border-left: 4px solid var(--danger); }
.list-item { border-top: 1px solid var(--border); padding: 10px 0; }
.list-item:first-of-type { border-top: none; padding-top: 0; }
table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
th, td { text-align: left; padding: 8px 6px; border-top: 1px solid var(--border); vertical-align: top; }
th { color: var(--muted); font-weight: 600; border-top: none; }
td.num { white-space: nowrap; font-variant-numeric: tabular-nums; }
.table-wrap { overflow-x: auto; }
.two { display: grid; grid-template-columns: 3fr 2fr; gap: 16px; align-items: start; }
.page-row { display: grid; grid-template-columns: auto 1fr auto; gap: 10px; align-items: center; padding: 10px 0; border-top: 1px solid var(--border); }
.page-row:first-child { border-top: none; }
.page-row input[type="checkbox"], .check input[type="checkbox"], .check input[type="radio"] { width: 18px; height: 18px; accent-color: var(--accent); flex: none; }
.page-row .token-fix { grid-column: 2 / 4; display: flex; gap: 8px; }
.check { display: flex; gap: 8px; align-items: center; font-weight: 500; }
.check select, .check input[type="number"] { width: auto; }
code { background: var(--surface-2); padding: 1px 6px; border-radius: 5px; font-size: 13px; word-break: break-all; }
.steps { margin: 6px 0 0; padding-left: 20px; }
.steps li + li { margin-top: 4px; }
@media (max-width: 760px) { .kpis { grid-template-columns: repeat(2, 1fr); } .two { grid-template-columns: 1fr; } }

/* Công tắc bật/tắt và danh sách giờ gửi */
.switch { position: relative; display: inline-block; width: 46px; height: 26px; flex: none; margin: 0; }
.switch input { position: absolute; opacity: 0; width: 0; height: 0; }
.switch .slider { position: absolute; inset: 0; background: var(--border); border-radius: 999px; cursor: pointer; transition: background 0.15s; }
.switch .slider::before { content: ""; position: absolute; width: 20px; height: 20px; left: 3px; top: 3px; background: #fff; border-radius: 50%; box-shadow: 0 1px 2px rgba(0, 0, 0, 0.25); transition: transform 0.15s; }
.switch input:checked + .slider { background: var(--accent); }
.switch input:checked + .slider::before { transform: translateX(20px); }
.switch input:focus-visible + .slider { outline: 2px solid var(--accent); outline-offset: 2px; }
.sched-row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.sched-row select { width: auto; min-width: 150px; }
input[type="time"] { font: inherit; color: var(--text); background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 8px 10px; }
.icon-btn { border: none; background: none; color: var(--danger); padding: 6px; }
.icon-btn:hover { background: var(--danger-soft); }