/* =====================================================================
   CSKH ADMIN — BRAND LAYER
   Adapted from reference (WIRECORE MISSION CONTROL): dark oklch palette,
   monospace type, bracketed panels, data-dense tables, status pills.
   Loaded AFTER Tailwind CDN so these tokens/components win.
   ===================================================================== */
:root {
  --bg:            oklch(16% 0.012 250);
  --surface:       oklch(20% 0.014 250);
  --surface-2:     oklch(24% 0.016 250);
  --fg:            oklch(94% 0.01 145);
  --muted:         oklch(62% 0.02 240);
  --subtle:        oklch(46% 0.02 240);
  --border:        oklch(28% 0.018 240);
  --border-strong: oklch(36% 0.02 240);
  --accent:        oklch(78% 0.18 145);
  --accent-dim:    oklch(45% 0.12 145);
  --accent-soft:   oklch(28% 0.08 145);
  --danger:        oklch(68% 0.22 25);
  --danger-soft:   oklch(28% 0.10 25);
  --warn:          oklch(78% 0.16 75);
  --warn-soft:     oklch(28% 0.08 75);
  --info:          oklch(72% 0.14 240);

  /* Task status colors — explicit product spec (light pastels) */
  --st-new:    #FFF2CC; /* New */
  --st-doing:  #CFE2F3; /* Đang xử lý */
  --st-done:   #D9EAD3; /* Hoàn thành */
  --st-ink:    #1f2937; /* dark text for pastel pills */

  --font-body: 'JetBrains Mono', 'IBM Plex Mono', ui-monospace, Menlo, monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 12px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  background-image:
    linear-gradient(oklch(22% 0.014 250) 1px, transparent 1px),
    linear-gradient(90deg, oklch(22% 0.014 250) 1px, transparent 1px);
  background-size: 40px 40px;
  background-position: -1px -1px;
}
.num { font-variant-numeric: tabular-nums; }
a { color: inherit; text-decoration: none; }

/* ---------- App shell ---------- */
.app { display: grid; grid-template-columns: 230px 1fr; min-height: 100vh; }
.sidebar {
  background: oklch(14% 0.014 250);
  border-inline-end: 1px solid var(--border);
  display: flex; flex-direction: column;
  position: sticky; top: 0; height: 100vh;
}
.brand { padding: 16px 18px; border-bottom: 1px solid var(--border); }
.brand-row { display: flex; align-items: center; gap: 10px; }
.brand-mark {
  width: 28px; height: 28px; border: 1.5px solid var(--accent);
  color: var(--accent); display: grid; place-items: center;
  font-weight: 700; font-size: 13px;
  box-shadow: 0 0 12px color-mix(in oklch, var(--accent) 35%, transparent);
}
.brand-name { font-weight: 700; font-size: 12px; letter-spacing: 0.08em; }
.brand-sub { font-size: 9px; color: var(--accent); letter-spacing: 0.18em; margin-top: 6px; }
.brand-status { display: flex; align-items: center; gap: 6px; margin-top: 8px; font-size: 10px; color: var(--muted); }
.pulse-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 8px var(--accent); animation: pulse 1.6s ease-in-out infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.4; } }

.nav { flex: 1; padding: 12px 0; overflow-y: auto; }
.nav-section { padding: 12px 18px 6px; font-size: 9px; letter-spacing: 0.2em; color: var(--subtle); }
.nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 18px; cursor: pointer;
  color: var(--muted); font-size: 11px; letter-spacing: 0.04em;
  user-select: none; border-left: 2px solid transparent; text-transform: uppercase;
}
.nav-item:hover { color: var(--fg); background: oklch(18% 0.014 250); }
.nav-item.active { color: var(--accent); border-left-color: var(--accent); background: oklch(18% 0.018 250); }
.nav-item .ic { width: 14px; height: 14px; flex: none; }
.nav-item .badge { margin-inline-start: auto; font-size: 9px; padding: 1px 6px; background: var(--danger-soft); color: var(--danger); border: 1px solid color-mix(in oklch, var(--danger) 40%, transparent); }

.sidebar-foot { padding: 12px 18px; border-top: 1px solid var(--border); font-size: 10px; color: var(--muted); }
.sidebar-foot .row { display: flex; justify-content: space-between; padding: 3px 0; }
.sidebar-foot .row b { color: var(--fg); }

/* ---------- Topbar ---------- */
.main { min-width: 0; }
.topbar {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in oklch, var(--bg) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  display: grid; grid-template-columns: 1fr auto auto; gap: 12px;
  padding: 10px 22px; align-items: center; font-size: 11px;
}
.crumb { letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
.crumb b { color: var(--accent); font-weight: 600; }
.ts { color: var(--muted); }
.ts b { color: var(--fg); }

/* ---------- Buttons ---------- */
.btn {
  background: transparent; border: 1px solid var(--border-strong); color: var(--fg);
  padding: 6px 12px; font: inherit; font-size: 10px; letter-spacing: 0.1em;
  cursor: pointer; text-transform: uppercase;
}
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn.accent { border-color: var(--accent); color: var(--accent); box-shadow: inset 0 0 0 1px color-mix(in oklch, var(--accent) 30%, transparent); }
.btn.accent:hover { background: var(--accent-soft); }
.btn.danger { border-color: var(--danger); color: var(--danger); }
.btn.danger:hover { background: var(--danger-soft); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* ---------- Page ---------- */
.page { padding: 22px 24px 60px; max-width: 1600px; }
.page-head { display: flex; align-items: flex-end; justify-content: space-between; margin-bottom: 22px; padding-bottom: 12px; border-bottom: 1px solid var(--border); }
.page-title { margin: 0; font-size: 11px; letter-spacing: 0.2em; color: var(--muted); font-weight: 600; }
.page-title b { color: var(--accent); font-weight: 700; }
.page-desc { margin: 6px 0 0; font-size: 22px; font-weight: 600; letter-spacing: -0.01em; color: var(--fg); }

/* ---------- Screens ---------- */
.screen { display: none; }
.screen.active { display: block; }

/* ---------- KPI ---------- */
.kpis { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--border); border: 1px solid var(--border); margin-bottom: 16px; }
.kpi { background: var(--surface); padding: 14px 16px; position: relative; overflow: hidden; }
.kpi-corner { position: absolute; top: 0; right: 0; width: 8px; height: 8px; border-top: 1px solid var(--accent); border-right: 1px solid var(--accent); }
.kpi-corner.tl { top: 0; left: 0; right: auto; border-right: 0; border-left: 1px solid var(--accent); }
.kpi-label { font-size: 9px; letter-spacing: 0.2em; color: var(--muted); text-transform: uppercase; }
.kpi-value { font-size: 28px; font-weight: 600; letter-spacing: -0.02em; margin-top: 8px; line-height: 1; }
.kpi-unit { font-size: 11px; font-weight: 400; color: var(--muted); margin-inline-start: 6px; letter-spacing: 0.05em; }
.kpi-trend { margin-top: 10px; font-size: 10px; color: var(--accent); letter-spacing: 0.05em; }
.kpi-trend.down { color: var(--danger); }
.kpi-trend.flat { color: var(--muted); }

/* ---------- Panels ---------- */
.grid-2 { display: grid; grid-template-columns: 1.4fr 1fr; gap: 16px; margin-bottom: 16px; }
.panel { background: var(--surface); border: 1px solid var(--border); position: relative; }
.panel::before, .panel::after { content: ''; position: absolute; width: 10px; height: 10px; border-color: var(--accent-dim); }
.panel::before { top: -1px; left: -1px; border-top: 1px solid; border-left: 1px solid; }
.panel::after { bottom: -1px; right: -1px; border-bottom: 1px solid; border-right: 1px solid; }
.panel-head { padding: 12px 16px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.panel-title { font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--muted); font-weight: 600; }
.panel-title b { color: var(--accent); }
.panel-sub { font-size: 10px; color: var(--subtle); letter-spacing: 0.05em; }

/* ---------- Tables ---------- */
table.t { width: 100%; border-collapse: collapse; font-size: 11px; }
table.t th { text-align: start; padding: 8px 14px; font-size: 9px; letter-spacing: 0.15em; text-transform: uppercase; color: var(--subtle); font-weight: 600; border-bottom: 1px solid var(--border); background: oklch(18% 0.014 250); position: sticky; top: 0; }
table.t td { padding: 9px 14px; border-bottom: 1px solid var(--border); vertical-align: middle; }
table.t tr:last-child td { border-bottom: 0; }
table.t tr:hover td { background: oklch(22% 0.016 250); }
table.t .num { text-align: end; font-variant-numeric: tabular-nums; }
table.t th.num { text-align: end; }
.code { color: var(--accent); font-size: 10px; letter-spacing: 0.06em; }
.dim { color: var(--muted); }
.row-actions { display: flex; gap: 6px; justify-content: flex-end; }
.empty { padding: 28px 16px; text-align: center; color: var(--muted); font-size: 11px; letter-spacing: 0.08em; }

/* ---------- Pills ---------- */
.pill { display: inline-block; padding: 1px 7px; font-size: 9px; letter-spacing: 0.12em; text-transform: uppercase; font-weight: 600; border: 1px solid; }
.pill.ok { color: var(--accent); border-color: var(--accent-dim); background: var(--accent-soft); }
.pill.danger { color: var(--danger); border-color: var(--danger); background: var(--danger-soft); }
.pill.warn { color: var(--warn); border-color: var(--warn); background: var(--warn-soft); }
.pill.info { color: var(--info); border-color: color-mix(in oklch, var(--info) 50%, transparent); background: oklch(24% 0.06 240); }
.pill.muted { color: var(--muted); border-color: var(--border-strong); }
/* Task-status pills use the explicit pastel spec with dark ink */
.pill.st-new   { color: var(--st-ink); background: var(--st-new);   border-color: #e6d28a; }
.pill.st-doing { color: var(--st-ink); background: var(--st-doing); border-color: #9dc3e6; }
.pill.st-done  { color: var(--st-ink); background: var(--st-done);  border-color: #a9cf99; }

/* ---------- Toolbar ---------- */
.toolbar { display: flex; align-items: center; gap: 8px; padding: 10px 16px; border-bottom: 1px solid var(--border); flex-wrap: wrap; }
.chip { padding: 3px 10px; font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase; border: 1px solid var(--border-strong); color: var(--muted); cursor: pointer; }
.chip.active { color: var(--accent); border-color: var(--accent); background: var(--accent-soft); }
.toolbar input, .toolbar select { background: oklch(14% 0.014 250); color: var(--fg); border: 1px solid var(--border-strong); padding: 5px 10px; font: inherit; font-size: 11px; }
.toolbar input:focus, .toolbar select:focus { outline: none; border-color: var(--accent); }
.spacer { flex: 1; }
.pager { padding: 10px 16px; display: flex; justify-content: space-between; align-items: center; border-top: 1px solid var(--border); font-size: 10px; color: var(--muted); letter-spacing: 0.08em; }

/* ---------- Forms / fields ---------- */
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.field label { font-size: 9px; letter-spacing: 0.16em; color: var(--muted); text-transform: uppercase; }
.field input, .field select, .field textarea {
  background: oklch(14% 0.014 250); color: var(--fg);
  border: 1px solid var(--border-strong); padding: 8px 10px; font: inherit; font-size: 12px;
}
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }

/* ---------- Modal ---------- */
.modal-mask { position: fixed; inset: 0; background: oklch(8% 0.01 250 / 0.7); display: none; place-items: center; z-index: 200; padding: 24px; }
.modal-mask.open { display: grid; }
.modal { width: 100%; max-width: 520px; background: var(--surface); border: 1px solid var(--border-strong); position: relative; max-height: 90vh; overflow: auto; }
.modal-head { padding: 14px 18px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; }
.modal-head h3 { margin: 0; font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); }
.modal-body { padding: 18px; }
.modal-foot { padding: 14px 18px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 8px; }

/* ---------- Login ---------- */
.login-wrap { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.login-card { width: 100%; max-width: 360px; background: var(--surface); border: 1px solid var(--border-strong); position: relative; padding: 28px 26px; }
.login-card .brand-row { justify-content: center; margin-bottom: 6px; }
.login-title { text-align: center; font-size: 10px; letter-spacing: 0.24em; color: var(--accent); text-transform: uppercase; margin: 14px 0 22px; }
.login-err { display: none; margin-bottom: 14px; padding: 8px 10px; font-size: 10px; color: var(--danger); border: 1px solid var(--danger); background: var(--danger-soft); letter-spacing: 0.06em; }
.login-err.show { display: block; }

/* ---------- Toast ---------- */
.toast { position: fixed; bottom: 18px; right: 18px; z-index: 300; display: flex; flex-direction: column; gap: 8px; }
.toast > div { background: var(--surface-2); border: 1px solid var(--border-strong); border-left: 2px solid var(--accent); padding: 10px 14px; font-size: 11px; letter-spacing: 0.05em; min-width: 220px; }
.toast > div.err { border-left-color: var(--danger); color: var(--danger); }

/* ---------- Overlays ---------- */
.scanline { position: fixed; inset: 0; pointer-events: none; z-index: 100;
  background: linear-gradient(to bottom, transparent 0%, transparent 49.5%, color-mix(in oklch, var(--accent) 6%, transparent) 50%, transparent 50.5%, transparent 100%);
  background-size: 100% 4px; mix-blend-mode: screen; opacity: 0.5; }
.grid-overlay { position: fixed; inset: 0; pointer-events: none; z-index: 99;
  background: radial-gradient(ellipse at center, transparent 30%, oklch(10% 0.012 250) 100%); opacity: 0.4; }
.mode-pill { background: var(--warn-soft); color: var(--warn); border: 1px solid var(--warn); padding: 2px 8px; font-size: 9px; letter-spacing: 0.12em; text-transform: uppercase; }