/* TTK PDF – giao diện chung. Bảng màu: giấy văn phòng + mực xanh, nhấn đỏ son cho dấu đánh dấu */
:root {
  --bg: #f3f4f1;
  --surface: #ffffff;
  --surface-2: #eceee9;
  --fg: #1b211e;
  --muted: #5d6762;
  --line: #d5d9d3;
  --accent: #1f5f8b;
  --accent-fg: #ffffff;
  --danger: #b3261e;
  --ok: #2e7d4f;
  --warn: #a86400;
  --shadow: 0 1px 2px rgba(20, 30, 25, .08), 0 4px 14px rgba(20, 30, 25, .06);
  --font: "Be Vietnam Pro", "Segoe UI", Roboto, Arial, sans-serif;
  --mono: "JetBrains Mono", Consolas, monospace;
  --radius: 8px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #121614; --surface: #1b201d; --surface-2: #232925; --fg: #e6ebe7; --muted: #9aa59f;
    --line: #313833; --accent: #5aa4d6; --accent-fg: #0b1620; --danger: #ef6a5f; --ok: #5cc28a;
    --warn: #e0a24a; --shadow: 0 1px 2px rgba(0,0,0,.4); color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #121614; --surface: #1b201d; --surface-2: #232925; --fg: #e6ebe7; --muted: #9aa59f;
  --line: #313833; --accent: #5aa4d6; --accent-fg: #0b1620; --danger: #ef6a5f; --ok: #5cc28a;
  --warn: #e0a24a; --shadow: 0 1px 2px rgba(0,0,0,.4); color-scheme: dark;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; height: 100%; }
body { background: var(--bg); color: var(--fg); font: 14px/1.5 var(--font); }
a { color: var(--accent); }
h1, h2, h3 { text-wrap: balance; margin: 0; }

button, .btn {
  font: inherit; cursor: pointer; border: 1px solid var(--line); background: var(--surface);
  color: var(--fg); border-radius: 6px; padding: 6px 12px; display: inline-flex; align-items: center;
  gap: 6px; white-space: nowrap;
}
button:hover { border-color: var(--accent); }
button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 1px;
}
button.primary { background: var(--accent); color: var(--accent-fg); border-color: var(--accent); }
button.danger { color: var(--danger); }
button:disabled { opacity: .5; cursor: default; }

input, textarea, select {
  font: inherit; width: 100%; padding: 8px 10px; border: 1px solid var(--line);
  border-radius: 6px; background: var(--surface); color: var(--fg);
}
label { display: grid; gap: 4px; font-weight: 500; }
label small { font-weight: 400; color: var(--muted); }

.msg { padding: 8px 12px; border-radius: 6px; font-size: 13px; }
.msg.err { background: color-mix(in srgb, var(--danger) 12%, transparent); color: var(--danger); }
.msg.ok { background: color-mix(in srgb, var(--ok) 14%, transparent); color: var(--ok); }

.chip { display: inline-block; padding: 1px 8px; border-radius: 99px; font-size: 12px; font-weight: 500; }
.chip.pending { background: color-mix(in srgb, var(--warn) 18%, transparent); color: var(--warn); }
.chip.approved { background: color-mix(in srgb, var(--ok) 18%, transparent); color: var(--ok); }
.chip.rejected, .chip.disabled { background: color-mix(in srgb, var(--danger) 15%, transparent); color: var(--danger); }
.chip.admin { background: color-mix(in srgb, var(--accent) 18%, transparent); color: var(--accent); }

/* ── Thanh trên cùng ── */
.topbar {
  display: flex; align-items: center; gap: 12px; padding: 8px max(16px, env(safe-area-inset-left, 0px));
  background: var(--surface); border-bottom: 1px solid var(--line); flex-wrap: wrap;
}
.brand { font-weight: 700; letter-spacing: .02em; display: flex; align-items: center; gap: 8px; }
.brand .logo { width: 24px; height: 24px; border-radius: 5px; background: var(--accent); color: var(--accent-fg);
  display: grid; place-items: center; font-size: 11px; font-weight: 700; }
.topbar .spacer { flex: 1; }
.topbar .who { color: var(--muted); font-size: 13px; }

/* ── Trang đăng nhập ── */
.auth-wrap { min-height: 100%; display: grid; place-items: center;
  padding: 32px max(16px, env(safe-area-inset-right, 0px)) 32px max(16px, env(safe-area-inset-left, 0px)); }
.auth { width: 100%; max-width: 420px; background: var(--surface); border: 1px solid var(--line);
  border-radius: 12px; box-shadow: var(--shadow); padding: 28px; display: grid; gap: 18px; }
.auth h1 { font-size: 22px; }
.auth p.sub { margin: -10px 0 0; color: var(--muted); }
.tabs { display: grid; grid-template-columns: 1fr 1fr; border: 1px solid var(--line); border-radius: 8px; padding: 3px; gap: 3px; }
.tabs button { border: 0; justify-content: center; }
.tabs button[aria-selected="true"] { background: var(--accent); color: var(--accent-fg); }
form.stack { display: grid; gap: 12px; }

/* ── Admin ── */
.page { max-width: 1100px; margin: 0 auto; padding: 24px max(16px, env(safe-area-inset-right, 0px)) 48px max(16px, env(safe-area-inset-left, 0px)); display: grid; gap: 20px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 18px; display: grid; gap: 14px; }
.stats { display: flex; gap: 10px; flex-wrap: wrap; }
.stats button[aria-pressed="true"] { background: var(--accent); color: var(--accent-fg); border-color: var(--accent); }
.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; min-width: 760px; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 12px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); font-weight: 600; }
td .note { color: var(--muted); font-size: 13px; max-width: 280px; white-space: pre-wrap; }
td.actions { display: flex; gap: 6px; flex-wrap: wrap; }
.num { font-variant-numeric: tabular-nums; }

/* ── Modal ── */
dialog { border: 1px solid var(--line); border-radius: 12px; background: var(--surface); color: var(--fg);
  padding: 22px; width: min(480px, calc(100vw - 32px)); box-shadow: var(--shadow); }
dialog::backdrop { background: rgba(10, 15, 12, .45); }
dialog form { display: grid; gap: 12px; }
dialog .row-btns { display: flex; justify-content: flex-end; gap: 8px; margin-top: 6px; }
.help { color: var(--muted); font-size: 12px; white-space: pre-line; margin: -6px 0 0; }

.toast { position: fixed; right: max(16px, env(safe-area-inset-right, 0px)); bottom: calc(16px + env(safe-area-inset-bottom, 0px));
  background: var(--fg); color: var(--bg); padding: 10px 14px; border-radius: 8px; box-shadow: var(--shadow);
  z-index: 50; max-width: min(420px, calc(100vw - 32px)); }

@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }