/* =====================================================================
   NKGrid design system - dung chung cho Portal, Giam sat, Cau hinh
   ===================================================================== */
:root {
  --bg: #edf2f5;
  --surface: #ffffff;
  --surface-2: #f5f8fa;
  --line: #d6dee4;
  --line-strong: #b9c6cf;
  --ink: #15222c;
  --ink-2: #4a5b68;
  --ink-3: #74848f;
  --accent: #006d86;
  --accent-hover: #00586d;
  --accent-ink: #ffffff;
  --accent-soft: #dceef2;
  --run: #17924f;
  --run-soft: #ddf3e6;
  --alarm: #cc2f27;
  --alarm-soft: #fbe3e1;
  --warn: #a86b00;
  --warn-soft: #fbf0d9;
  --focus: 0 0 0 3px rgba(0, 109, 134, .28);
  --shadow-pop: 0 18px 50px rgba(16, 34, 44, .22), 0 2px 6px rgba(16, 34, 44, .08);
  --r-sm: 6px;
  --r-md: 10px;
  --side-w: 236px;
  --font: 'Be Vietnam Pro', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --mono: ui-monospace, 'SFMono-Regular', Menlo, Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0e161c; --surface: #15202a; --surface-2: #1a2732; --line: #26343f; --line-strong: #3a4d5a;
    --ink: #e4ecf1; --ink-2: #a9b8c3; --ink-3: #7d8e9a;
    --accent: #3fb6d3; --accent-hover: #67c8df; --accent-ink: #04212a; --accent-soft: #123140;
    --run: #35c77a; --run-soft: #12301f; --alarm: #ff6b5e; --alarm-soft: #3a1b19; --warn: #f0b13e; --warn-soft: #33280f;
    --focus: 0 0 0 3px rgba(63, 182, 211, .35);
    --shadow-pop: 0 18px 50px rgba(0, 0, 0, .55);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0e161c; --surface: #15202a; --surface-2: #1a2732; --line: #26343f; --line-strong: #3a4d5a;
  --ink: #e4ecf1; --ink-2: #a9b8c3; --ink-3: #7d8e9a;
  --accent: #3fb6d3; --accent-hover: #67c8df; --accent-ink: #04212a; --accent-soft: #123140;
  --run: #35c77a; --run-soft: #12301f; --alarm: #ff6b5e; --alarm-soft: #3a1b19; --warn: #f0b13e; --warn-soft: #33280f;
  --focus: 0 0 0 3px rgba(63, 182, 211, .35);
  --shadow-pop: 0 18px 50px rgba(0, 0, 0, .55);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 400 15px/1.5 var(--font);
  font-feature-settings: "tnum" 1;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { margin: 0; line-height: 1.25; font-weight: 650; }
h1 { font-size: 24px; letter-spacing: -.01em; }
h2 { font-size: 18px; }
h3 { font-size: 15px; }
p { margin: 0; }
code, .mono { font-family: var(--mono); font-size: .88em; }
[hidden] { display: none !important; }
:focus-visible { outline: none; box-shadow: var(--focus); border-radius: var(--r-sm); }
.muted { color: var(--ink-3); }
.small { font-size: 13px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ------------------------------------------------------------ app shell */
.nk-app { min-height: 100vh; display: grid; grid-template-columns: var(--side-w) minmax(0, 1fr); }
.nk-side {
  position: sticky; top: 0; height: 100vh; display: flex; flex-direction: column;
  background: var(--surface); border-right: 1px solid var(--line); padding: 18px 12px 14px;
}
.nk-brand { display: flex; gap: 10px; align-items: center; padding: 4px 8px 18px; color: var(--ink); }
.nk-brand:hover { text-decoration: none; }
.nk-brand-mark {
  width: 34px; height: 34px; border-radius: 8px; flex: none; display: grid; place-items: center;
  background: var(--accent); color: var(--accent-ink);
}
/* Logo cong ty: dat tren nen trang de dung duoc ca giao dien toi; logo ngang van vua */
.nk-brand.has-logo { flex-direction: column; align-items: flex-start; gap: 8px; }
.nk-brand-logo { height: 48px; width: auto; max-width: 196px; object-fit: contain; flex: none;
  background: #fff; padding: 4px 6px; border-radius: 8px; border: 1px solid var(--line); }
.nk-brand-name { font-weight: 700; font-size: 15px; line-height: 1.15; }
.nk-credit {
  position: fixed; right: 12px; bottom: 8px; z-index: 5; pointer-events: none;
  font-size: 11px; letter-spacing: .01em; color: var(--ink-3); opacity: .75;
}
@media (max-width: 900px) { .nk-credit { right: 8px; bottom: 4px; font-size: 10px; } }
@media print { .nk-credit { display: none; } }
.nk-nav { display: flex; flex-direction: column; gap: 2px; }
.nk-nav a {
  display: flex; align-items: center; gap: 11px; padding: 9px 10px; border-radius: 8px;
  color: var(--ink-2); font-weight: 500; font-size: 14.5px;
}
.nk-nav a svg { flex: none; opacity: .85; }
.nk-nav a:hover { background: var(--surface-2); color: var(--ink); text-decoration: none; }
.nk-nav a[aria-current="page"] { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.nk-nav-sep { height: 1px; background: var(--line); margin: 10px 8px; }
.nk-side-foot { margin-top: auto; border-top: 1px solid var(--line); padding: 12px 6px 0; display: grid; gap: 8px; }
.nk-user { display: flex; align-items: center; gap: 10px; min-width: 0; }
.nk-avatar {
  width: 32px; height: 32px; border-radius: 50%; display: grid; place-items: center; flex: none;
  background: var(--surface-2); border: 1px solid var(--line); font-weight: 600; font-size: 13px; color: var(--ink-2);
}
.nk-user-name { font-weight: 600; font-size: 14px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.nk-user-role { font-size: 12px; color: var(--ink-3); }
.nk-side-actions { display: flex; gap: 6px; }
.nk-side-actions .btn { flex: 1; }

.nk-topbar, .nk-scrim { display: none; }
.nk-main { min-width: 0; padding: 26px 32px 64px; }
.nk-pagehead { display: flex; justify-content: space-between; align-items: flex-end; gap: 16px; flex-wrap: wrap; margin-bottom: 22px; }
.nk-pagehead p { color: var(--ink-3); margin-top: 4px; font-size: 14px; }
.nk-pagehead-actions { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }

@media (max-width: 900px) {
  .nk-app { grid-template-columns: 1fr; }
  .nk-side {
    position: fixed; z-index: 60; left: 0; top: 0; width: min(84vw, 290px);
    transform: translateX(-102%); transition: transform .2s ease; box-shadow: var(--shadow-pop);
  }
  body.nk-menu-open .nk-side { transform: none; }
  body.nk-menu-open .nk-scrim { display: block; }
  .nk-scrim { display: none; position: fixed; inset: 0; z-index: 55; background: rgba(8, 18, 24, .45); }
  .nk-topbar {
    display: flex; align-items: center; gap: 10px; position: sticky; top: 0; z-index: 40;
    padding: 10px 16px; background: var(--surface); border-bottom: 1px solid var(--line);
  }
  .nk-topbar-title { font-weight: 650; flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  .nk-main { padding: 18px 16px 56px; }
  h1 { font-size: 21px; }
}

/* ------------------------------------------------------------ buttons */
.btn {
  --b-bg: var(--surface); --b-ink: var(--ink); --b-line: var(--line-strong);
  display: inline-flex; align-items: center; justify-content: center; gap: 7px;
  height: 36px; padding: 0 14px; border-radius: var(--r-sm); border: 1px solid var(--b-line);
  background: var(--b-bg); color: var(--b-ink); font: 500 14px/1 var(--font); cursor: pointer;
  white-space: nowrap; text-decoration: none; transition: background-color .12s, border-color .12s;
}
.btn:hover { text-decoration: none; background: var(--surface-2); }
.btn:disabled, .btn[aria-disabled="true"] { opacity: .5; cursor: not-allowed; }
.btn-primary { --b-bg: var(--accent); --b-ink: var(--accent-ink); --b-line: var(--accent); font-weight: 600; }
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn-danger { --b-ink: var(--alarm); --b-line: var(--line-strong); }
.btn-danger:hover { background: var(--alarm-soft); border-color: var(--alarm); }
.btn-danger-solid { --b-bg: var(--alarm); --b-ink: #fff; --b-line: var(--alarm); font-weight: 600; }
.btn-danger-solid:hover { background: var(--alarm); filter: brightness(.92); }
.btn-ghost { --b-bg: transparent; --b-line: transparent; color: var(--ink-2); }
.btn-ghost:hover { background: var(--surface-2); color: var(--ink); }
.btn-sm { height: 30px; padding: 0 10px; font-size: 13px; }
.btn-icon { width: 36px; padding: 0; }
.btn-icon.btn-sm { width: 30px; }

/* ------------------------------------------------------------ forms */
.field { display: grid; gap: 6px; align-content: start; }
.field > span:first-child, .label { font-size: 13px; font-weight: 600; color: var(--ink-2); }
.field-hint, .field > .field-hint { font-size: 12.5px; font-weight: 400; color: var(--ink-3); line-height: 1.4; }
.input, .select, .textarea,
.field input:not([type=checkbox]):not([type=radio]), .field select, .field textarea {
  width: 100%; height: 38px; padding: 0 11px; border-radius: var(--r-sm);
  border: 1px solid var(--line-strong); background: var(--surface); color: var(--ink);
  font: 400 14.5px/1.3 var(--font);
}
.field textarea, .textarea { height: auto; min-height: 120px; padding: 10px 11px; font-family: var(--mono); font-size: 13px; }
.input:focus, .select:focus, .textarea:focus,
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--accent); box-shadow: var(--focus); }
.input-sm { height: 30px; font-size: 13.5px; padding: 0 8px; }
.form-grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); }
.form-stack { display: grid; gap: 14px; }
.check { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; cursor: pointer; }
.check input { width: 16px; height: 16px; accent-color: var(--accent); margin: 0; }
.checks { display: flex; flex-wrap: wrap; gap: 8px 18px; }
.search { position: relative; }
.search svg { position: absolute; left: 10px; top: 50%; transform: translateY(-50%); color: var(--ink-3); pointer-events: none; }
.search .input { padding-left: 34px; }

/* ------------------------------------------------------------ panels & tables */
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-md); }
.panel + .panel { margin-top: 18px; }
.panel-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 14px 18px; border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.panel-head p { color: var(--ink-3); font-size: 13px; margin-top: 2px; }
.panel-body { padding: 18px; }
.table-wrap { overflow-x: auto; }
.tbl { width: 100%; border-collapse: collapse; font-size: 14px; }
.tbl th { text-align: left; font-weight: 600; font-size: 12.5px; color: var(--ink-3); padding: 10px 14px; border-bottom: 1px solid var(--line); background: var(--surface-2); white-space: nowrap; }
.tbl td { padding: 10px 14px; border-bottom: 1px solid var(--line); vertical-align: middle; }
.tbl tr:last-child td { border-bottom: 0; }
.tbl tbody tr:hover td { background: color-mix(in srgb, var(--surface-2) 70%, transparent); }
.tbl .num { text-align: right; }
.tbl .actions { text-align: right; white-space: nowrap; }
.tbl .actions .btn + .btn, .tbl .actions form + form, .tbl .actions .btn + form, .tbl .actions form + .btn { margin-left: 4px; }
.tbl .actions form { display: inline; }

@media (max-width: 700px) {
  /* Bang du lieu -> moi dong thanh 1 khoi doc doc tren dien thoai (tru bang nhap lieu) */
  .tbl:not(.reg-tbl) thead { display: none; }
  .tbl:not(.reg-tbl) tr { display: block; padding: 12px 16px; border-bottom: 1px solid var(--line); }
  .tbl:not(.reg-tbl) tr:last-child { border-bottom: 0; }
  .tbl:not(.reg-tbl) td { display: block; border: 0; padding: 2px 0; }
  .tbl:not(.reg-tbl) td:empty { display: none; }
  .tbl:not(.reg-tbl) .actions { text-align: left; padding-top: 10px; white-space: normal; }
  .tbl:not(.reg-tbl) .actions > * { margin: 0 4px 4px 0 !important; }
  .tbl:not(.reg-tbl) tbody tr:hover td { background: none; }
}

/* ------------------------------------------------------------ tabs, chips, segmented */
.tabs { display: flex; gap: 2px; border-bottom: 1px solid var(--line); margin-bottom: 20px; overflow-x: auto; scrollbar-width: none; }
.tab {
  appearance: none; border: 0; background: none; cursor: pointer; padding: 10px 14px 11px; margin-bottom: -1px;
  font: 500 14.5px/1 var(--font); color: var(--ink-3); border-bottom: 2px solid transparent; white-space: nowrap;
  display: inline-flex; gap: 8px; align-items: center;
}
.tab:hover { color: var(--ink); }
.tab[aria-selected="true"] { color: var(--ink); border-bottom-color: var(--accent); font-weight: 600; }
.tab .count { font-size: 12px; background: var(--surface-2); border: 1px solid var(--line); padding: 2px 7px; border-radius: 99px; color: var(--ink-2); }
.tab .count.badge-alarm { background: var(--alarm); color: #fff; border-color: var(--alarm); }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  appearance: none; cursor: pointer; display: inline-flex; align-items: center; gap: 7px;
  height: 32px; padding: 0 12px; border-radius: 99px; border: 1px solid var(--line-strong);
  background: var(--surface); color: var(--ink-2); font: 500 13.5px/1 var(--font);
}
.chip:hover { border-color: var(--ink-3); }
.chip[aria-pressed="true"] { background: var(--ink); border-color: var(--ink); color: var(--surface); }
.seg { display: inline-flex; border: 1px solid var(--line-strong); border-radius: var(--r-sm); overflow: hidden; }
.seg button { appearance: none; border: 0; background: var(--surface); color: var(--ink-2); height: 30px; padding: 0 11px; font: 500 13px/1 var(--font); cursor: pointer; }
.seg button + button { border-left: 1px solid var(--line-strong); }
.seg button[aria-pressed="true"] { background: var(--accent-soft); color: var(--accent); font-weight: 600; }

/* ------------------------------------------------------------ badges, dots */
.badge { display: inline-flex; align-items: center; gap: 6px; height: 22px; padding: 0 8px; border-radius: 99px; font-size: 12px; font-weight: 600; background: var(--surface-2); color: var(--ink-2); border: 1px solid var(--line); white-space: nowrap; }
.badge-ok { background: var(--run-soft); color: var(--run); border-color: transparent; }
.badge-alarm { background: var(--alarm-soft); color: var(--alarm); border-color: transparent; }
.badge-warn { background: var(--warn-soft); color: var(--warn); border-color: transparent; }
.badge-info { background: var(--accent-soft); color: var(--accent); border-color: transparent; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--ink-3); flex: none; display: inline-block; }
.dot-ok { background: var(--run); box-shadow: 0 0 0 3px color-mix(in srgb, var(--run) 22%, transparent); }
.dot-alarm { background: var(--alarm); box-shadow: 0 0 0 3px color-mix(in srgb, var(--alarm) 22%, transparent); }
.dot-warn { background: var(--warn); }

/* ------------------------------------------------------------ switch */
.switch { position: relative; display: inline-block; width: 46px; height: 26px; flex: none; }
.switch input { position: absolute; inset: 0; opacity: 0; margin: 0; cursor: pointer; z-index: 1; }
.switch span { position: absolute; inset: 0; border-radius: 99px; background: var(--line-strong); transition: background-color .15s; }
.switch span::after { content: ""; position: absolute; top: 3px; left: 3px; width: 20px; height: 20px; border-radius: 50%; background: #fff; box-shadow: 0 1px 3px rgba(0,0,0,.25); transition: transform .15s; }
.switch input:checked + span { background: var(--run); }
.switch input:checked + span::after { transform: translateX(20px); }
.switch input:focus-visible + span { box-shadow: var(--focus); }
.switch input:disabled { cursor: not-allowed; }
.switch input:disabled + span { opacity: .5; }

/* ------------------------------------------------------------ dialogs */
dialog.nk-modal {
  border: 1px solid var(--line); border-radius: 12px; padding: 0; width: min(560px, calc(100vw - 32px));
  background: var(--surface); color: var(--ink); box-shadow: var(--shadow-pop); max-height: calc(100vh - 48px);
}
dialog.nk-modal.wide { width: min(820px, calc(100vw - 32px)); }
dialog.nk-modal::backdrop { background: rgba(8, 18, 24, .5); }
.modal-head { display: flex; justify-content: space-between; align-items: center; padding: 16px 20px; border-bottom: 1px solid var(--line); }
.modal-body { padding: 20px; overflow-y: auto; max-height: calc(100vh - 200px); }
.modal-body > p { color: var(--ink-2); }
.modal-foot { display: flex; justify-content: flex-end; gap: 8px; padding: 14px 20px; border-top: 1px solid var(--line); background: var(--surface-2); border-radius: 0 0 12px 12px; }

.nk-drawer {
  position: fixed; z-index: 70; top: 0; right: 0; height: 100vh; width: min(460px, 100vw);
  background: var(--surface); border-left: 1px solid var(--line); box-shadow: var(--shadow-pop);
  display: flex; flex-direction: column; transform: translateX(104%); transition: transform .22s ease;
}
.nk-drawer.open { transform: none; }
.nk-drawer-head { display: flex; justify-content: space-between; gap: 12px; align-items: flex-start; padding: 18px 20px; border-bottom: 1px solid var(--line); }
.nk-drawer-body { padding: 18px 20px 28px; overflow-y: auto; flex: 1; display: grid; gap: 22px; align-content: start; }
.nk-drawer-scrim { position: fixed; inset: 0; z-index: 65; background: rgba(8, 18, 24, .35); display: none; }
.nk-drawer.open + .nk-drawer-scrim { display: block; }

/* ------------------------------------------------------------ toast */
.nk-toasts { position: fixed; z-index: 100; right: 18px; bottom: 18px; display: grid; gap: 8px; width: min(380px, calc(100vw - 36px)); }
.nk-toast {
  display: flex; gap: 10px; align-items: flex-start; padding: 12px 14px; border-radius: 10px;
  background: var(--ink); color: var(--surface); box-shadow: var(--shadow-pop); font-size: 14px;
  animation: nk-toast-in .18s ease-out;
}
.nk-toast .dot { margin-top: 6px; }
.nk-toast.ok .dot { background: #4ade80; }
.nk-toast.err .dot { background: #ff7b6e; }
.nk-toast.warn .dot { background: #f5c04e; }
@keyframes nk-toast-in { from { opacity: 0; transform: translateY(8px); } }

/* ------------------------------------------------------------ misc */
.empty { text-align: center; padding: 40px 20px; color: var(--ink-3); }
.empty h3 { color: var(--ink); margin-bottom: 6px; }
.empty .btn { margin-top: 14px; }
.callout { display: flex; gap: 12px; padding: 12px 14px; border-radius: var(--r-sm); background: var(--accent-soft); color: var(--ink); font-size: 14px; border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent); }
.callout.warn { background: var(--warn-soft); border-color: color-mix(in srgb, var(--warn) 30%, transparent); }
.callout.alarm { background: var(--alarm-soft); border-color: color-mix(in srgb, var(--alarm) 30%, transparent); }
.callout.ok { background: var(--run-soft); border-color: color-mix(in srgb, var(--run) 30%, transparent); }
.callout svg { flex: none; margin-top: 2px; }
.secret-box { display: flex; gap: 8px; margin-top: 10px; }
.secret-box input { font-family: var(--mono); font-size: 13px; }
.kv { display: grid; grid-template-columns: max-content 1fr; gap: 6px 16px; font-size: 14px; }
.kv dt { color: var(--ink-3); }
.kv dd { margin: 0; }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.spacer { flex: 1; }
.stack-sm > * + * { margin-top: 8px; }

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