:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --line: #e4e6eb;
  --text: #15171c;
  --muted: #6b7280;
  --accent: #fe2c55;
  --accent-ink: #ffffff;
  --ok: #15803d;
  --ok-bg: #e7f6ec;
  --warn: #b45309;
  --warn-bg: #fdf3e2;
  --bad: #b91c1c;
  --bad-bg: #fdecec;
  --chip: #f0f1f4;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.06), 0 1px 3px rgba(16, 24, 40, 0.08);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --card: #171a20;
    --line: #2a2e37;
    --text: #e8eaee;
    --muted: #9aa1ad;
    --ok: #4ade80;
    --ok-bg: #12301d;
    --warn: #fbbf24;
    --warn-bg: #33270f;
    --bad: #f87171;
    --bad-bg: #3a1616;
    --chip: #222630;
    --shadow: none;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 14px/1.45 -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
}
[hidden] { display: none !important; }
code, .key { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
small { color: var(--muted); font-weight: 400; }
.muted { color: var(--muted); }
.warn-text { color: var(--warn); }
h4 { margin: 22px 0 8px; font-size: 13px; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); }
label { display: block; margin: 14px 0 6px; font-weight: 600; font-size: 13px; }

/* ----- Nút / ô nhập ----- */
.btn {
  font: inherit; font-weight: 600; cursor: pointer;
  border: 1px solid var(--line); background: var(--card); color: var(--text);
  border-radius: 8px; padding: 8px 14px; white-space: nowrap;
}
.btn:hover { border-color: var(--muted); }
.btn:disabled { opacity: 0.5; cursor: default; }
.btn-sm { padding: 5px 10px; font-size: 13px; }
.btn-block { width: 100%; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { filter: brightness(0.95); border-color: var(--accent); }
.btn-ghost { background: transparent; border-color: transparent; color: var(--muted); }
.btn-danger { background: var(--bad); border-color: var(--bad); color: #fff; }
.btn-danger-ghost { background: transparent; color: var(--bad); border-color: transparent; }
.btn-danger-ghost:hover { background: var(--bad-bg); border-color: transparent; }
.icon-btn { border: 0; background: transparent; color: var(--muted); font-size: 16px; cursor: pointer; padding: 4px 8px; border-radius: 6px; }
.icon-btn:hover { background: var(--chip); }
.input {
  font: inherit; color: var(--text); background: var(--card);
  border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; width: 100%;
}
.input:focus { outline: 2px solid color-mix(in srgb, var(--accent) 35%, transparent); border-color: var(--accent); }
.inline { display: flex; gap: 8px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 14px; }
.hint { margin: 6px 0 0; color: var(--muted); font-size: 12.5px; }
.form-error { margin: 12px 0 0; padding: 8px 10px; border-radius: 8px; background: var(--bad-bg); color: var(--bad); font-size: 13px; }

/* ----- Logo ----- */
.brand { display: flex; align-items: center; gap: 10px; }
.brand b { display: block; font-size: 15px; }
.brand small { display: block; font-size: 12px; }
.logo {
  width: 34px; height: 34px; border-radius: 9px; display: grid; place-items: center;
  background: var(--accent); color: #fff; font-weight: 800; font-size: 13px; letter-spacing: 0.02em;
}

/* ----- Đăng nhập ----- */
.login { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login-card { width: 100%; max-width: 360px; background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 24px; box-shadow: var(--shadow); }
.login-card .brand { margin-bottom: 10px; }
.login-card .btn { margin-top: 16px; }

/* ----- Khung chính ----- */
.topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 14px 24px; background: var(--card); border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 5;
}
.topbar-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px; }
.stats { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 12px; padding: 20px 24px 0; }
@media (max-width: 1000px) { .stats { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
.stat {
  text-align: left; font: inherit; color: inherit; cursor: pointer;
  background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; box-shadow: var(--shadow);
}
.stat:hover { border-color: var(--muted); }
.stat span { display: block; color: var(--muted); font-size: 12.5px; }
.stat b { display: block; font-size: 22px; margin-top: 2px; font-variant-numeric: tabular-nums; }
.stat small { display: block; font-size: 11.5px; margin-top: 1px; }
.panel { margin: 16px 24px 24px; background: var(--card); border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow); }
.toolbar { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; padding: 12px 14px; border-bottom: 1px solid var(--line); }
.search { max-width: 320px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  font: inherit; font-size: 13px; cursor: pointer; border: 1px solid transparent;
  background: var(--chip); color: var(--text); border-radius: 999px; padding: 5px 12px;
}
.chip:hover { border-color: var(--line); }
.chip.active { background: var(--text); color: var(--bg); }

/* ----- Bảng ----- */
.table-wrap { overflow-x: auto; }
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--line); vertical-align: middle; white-space: nowrap; }
.table th { font-size: 12px; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: 0.03em; }
.table tbody tr[data-id] { cursor: pointer; }
.table tbody tr[data-id]:hover { background: color-mix(in srgb, var(--chip) 60%, transparent); }
.table-sm th, .table-sm td { padding: 7px 10px; font-size: 13px; }
.note-cell { max-width: 260px; overflow: hidden; text-overflow: ellipsis; }
.key { font-size: 13px; }
.copy-btn { border: 0; background: transparent; color: var(--muted); cursor: pointer; margin-left: 4px; font-size: 14px; padding: 2px 4px; border-radius: 4px; }
.copy-btn:hover { background: var(--chip); color: var(--text); }
.empty { padding: 32px; text-align: center; color: var(--muted); margin: 0; }
.pager { display: flex; justify-content: space-between; align-items: center; padding: 10px 14px; color: var(--muted); font-size: 13px; }
.pager div { display: flex; gap: 6px; }

.badge { display: inline-block; font-size: 12px; font-weight: 600; padding: 2px 9px; border-radius: 999px; }
.badge-ok { background: var(--ok-bg); color: var(--ok); }
.badge-warn { background: var(--warn-bg); color: var(--warn); }
.badge-bad { background: var(--bad-bg); color: var(--bad); }
.badge-muted { background: var(--chip); color: var(--muted); }

/* ----- Hộp thoại ----- */
.dialog {
  border: 1px solid var(--line); border-radius: 14px; padding: 0; width: min(520px, calc(100vw - 32px));
  background: var(--card); color: var(--text); box-shadow: 0 20px 50px rgba(0, 0, 0, 0.25);
}
.dialog-wide { width: min(860px, calc(100vw - 32px)); }
.dialog::backdrop { background: rgba(15, 17, 21, 0.45); }
.dialog-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 14px 18px; border-bottom: 1px solid var(--line); }
.dialog-body { padding: 4px 18px 18px; max-height: calc(100vh - 180px); overflow-y: auto; }
.dialog-foot { display: flex; justify-content: flex-end; gap: 8px; padding: 12px 18px; border-top: 1px solid var(--line); }
.dialog-foot.spread { justify-content: space-between; }
.detail-title { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.detail-title code { font-size: 15px; font-weight: 700; }

.plan-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.plan { margin: 0; font-weight: 500; }
.plan input { position: absolute; opacity: 0; pointer-events: none; }
.plan span { display: block; text-align: center; padding: 9px 6px; border: 1px solid var(--line); border-radius: 8px; cursor: pointer; font-size: 13px; }
.plan input:checked + span { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 10%, transparent); color: var(--accent); font-weight: 700; }
.plan input:focus-visible + span { outline: 2px solid var(--accent); }
.custom-plan { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 8px; }
.keys-out { margin-top: 14px; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 13px; resize: vertical; white-space: pre; }

.facts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 14px; }
.facts div { background: var(--chip); border-radius: 10px; padding: 9px 12px; }
.facts span { display: block; font-size: 12px; color: var(--muted); }
.facts b { display: block; font-size: 13.5px; margin-top: 1px; }

.events { list-style: none; margin: 0; padding: 0; font-size: 13px; }
.events li { display: grid; grid-template-columns: 130px 90px 1fr auto; gap: 10px; padding: 6px 0; border-bottom: 1px solid var(--line); }
.events time { color: var(--muted); font-variant-numeric: tabular-nums; }
.events .ev-deny b { color: var(--bad); }
.events .ev-activate b, .events .ev-extend b { color: var(--ok); }

.toast {
  position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%); z-index: 50;
  background: var(--text); color: var(--bg); padding: 10px 16px; border-radius: 10px; font-weight: 600; box-shadow: var(--shadow);
}
.toast-bad { background: var(--bad); color: #fff; }

@media (max-width: 720px) {
  .topbar { padding: 12px 16px; }
  .topbar .brand small { display: none; }
  .topbar .brand b { display: none; }
  .topbar-actions .btn { padding: 7px 10px; font-size: 13px; }
  .stats { padding: 16px 16px 0; grid-template-columns: repeat(2, 1fr); }
  .panel { margin: 12px 16px 16px; }
  .search { max-width: none; }
  .grid-2, .facts { grid-template-columns: 1fr 1fr; }
  .plan-grid { grid-template-columns: repeat(2, 1fr); }
  .events li { grid-template-columns: 1fr; gap: 2px; }
}