:root {
  color-scheme: light;
  --bg: #f4f4f2;
  --surface: #fcfcfb;
  --surface-2: #f0efec;
  --border: #e2e1dc;
  --fg: #0b0b0b;
  --fg-2: #52514e;
  --fg-3: #7a7974;
  --grid: #e7e6e1;
  --accent: #2a78d6;
  --series-1: #2a78d6;
  --series-1-soft: #b7d3f6;
  --series-2: #eb6834;
  --good: #0ca30c;
  --good-ink: #067a06;
  --warning: #fab219;
  --warning-ink: #8a5a00;
  --critical: #d03b3b;
  --critical-ink: #b02a2a;
  --nodata: #dcdbd6;
  --shadow: 0 1px 2px rgb(0 0 0 / 0.04);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    color-scheme: dark;
    --bg: #121211;
    --surface: #1a1a19;
    --surface-2: #232321;
    --border: #2f2f2c;
    --fg: #f0efec;
    --fg-2: #c3c2b7;
    --fg-3: #8e8d85;
    --grid: #2a2a27;
    --accent: #3987e5;
    --series-1: #3987e5;
    --series-1-soft: #1c3e66;
    --series-2: #d95926;
    --good-ink: #4cc94c;
    --warning-ink: #fab219;
    --critical-ink: #ef6b6b;
    --nodata: #33332f;
    --shadow: none;
  }
}
:root[data-theme='dark'] {
  color-scheme: dark;
  --bg: #121211;
  --surface: #1a1a19;
  --surface-2: #232321;
  --border: #2f2f2c;
  --fg: #f0efec;
  --fg-2: #c3c2b7;
  --fg-3: #8e8d85;
  --grid: #2a2a27;
  --accent: #3987e5;
  --series-1: #3987e5;
  --series-1-soft: #1c3e66;
  --series-2: #d95926;
  --good-ink: #4cc94c;
  --warning-ink: #fab219;
  --critical-ink: #ef6b6b;
  --nodata: #33332f;
  --shadow: none;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 15px/1.45 -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  font-variant-numeric: tabular-nums;
}
a { color: var(--accent); text-decoration: none; }
button {
  font: inherit; color: var(--fg); background: var(--surface); border: 1px solid var(--border);
  border-radius: 8px; padding: 6px 12px; cursor: pointer; min-height: 36px;
}
button:hover { border-color: var(--fg-3); }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
button:disabled { opacity: 0.5; cursor: default; }
input {
  font: inherit; color: var(--fg); background: var(--surface); border: 1px solid var(--border);
  border-radius: 8px; padding: 6px 10px; min-height: 36px;
}
.muted { color: var(--fg-3); }
.small { font-size: 13px; }

/* ---- khung ---- */
header.top {
  position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  padding: max(8px, env(safe-area-inset-top)) 16px 0;
}
.toprow { display: flex; align-items: center; gap: 8px; max-width: 1100px; margin: 0 auto; }
.toprow h1 { font-size: 17px; margin: 0; flex: 1; }
.toprow button { min-height: 32px; padding: 4px 10px; }
nav.tabs { display: flex; gap: 4px; max-width: 1100px; margin: 8px auto 0; overflow-x: auto; scrollbar-width: none; }
nav.tabs button {
  border: none; background: none; border-radius: 0; padding: 8px 12px 10px; color: var(--fg-2);
  border-bottom: 2px solid transparent; white-space: nowrap;
}
nav.tabs button[aria-selected='true'] { color: var(--fg); border-bottom-color: var(--accent); font-weight: 600; }
main { max-width: 1100px; margin: 0 auto; padding: 16px 16px calc(32px + env(safe-area-inset-bottom)); }
section.tab[hidden] { display: none; }

.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
  padding: 14px 16px; box-shadow: var(--shadow); margin-bottom: 14px; min-width: 0;
}
.card h2 { font-size: 15px; margin: 0 0 2px; }
.card h3 { font-size: 14px; margin: 14px 0 6px; color: var(--fg-2); font-weight: 600; }
.card .sub { color: var(--fg-3); font-size: 13px; margin: 0 0 10px; }
.grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid > .card { margin-bottom: 0; }
.stack { display: grid; gap: 14px; margin-bottom: 14px; }

/* ---- ô số liệu ---- */
.tiles { display: grid; gap: 10px; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); margin-bottom: 14px; }
.tile { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 12px 14px; }
.tile .lbl { font-size: 13px; color: var(--fg-2); }
.tile .val { font-size: 26px; font-weight: 650; letter-spacing: -0.01em; margin-top: 2px; }
.tile .val small { font-size: 14px; color: var(--fg-3); font-weight: 500; }
.tile .note { font-size: 12.5px; color: var(--fg-3); margin-top: 2px; }
.meter { height: 8px; border-radius: 4px; background: var(--surface-2); margin-top: 8px; position: relative; overflow: hidden; }
.meter > span { position: absolute; inset: 0 auto 0 0; border-radius: 4px; background: var(--series-1); }
.meter > i { position: absolute; top: 0; bottom: 0; border-left: 2px dashed var(--fg-3); }

/* ---- trạng thái ---- */
.pill {
  display: inline-flex; align-items: center; gap: 4px; font-size: 12.5px; font-weight: 600;
  padding: 2px 8px; border-radius: 999px; background: var(--surface-2); color: var(--fg-2); white-space: nowrap;
}
.pill.good { color: var(--good-ink); background: color-mix(in srgb, var(--good) 14%, transparent); }
.pill.warning { color: var(--warning-ink); background: color-mix(in srgb, var(--warning) 18%, transparent); }
.pill.critical { color: var(--critical-ink); background: color-mix(in srgb, var(--critical) 14%, transparent); }

.alerts { display: grid; gap: 8px; margin-bottom: 14px; }
.alert {
  display: flex; gap: 10px; align-items: flex-start; padding: 10px 12px; border-radius: 10px;
  border: 1px solid var(--border); background: var(--surface); border-left-width: 4px;
}
.alert.warning { border-left-color: var(--warning); }
.alert.critical { border-left-color: var(--critical); }
.alert .ic { font-size: 16px; line-height: 1.3; }
.alert .tt { font-weight: 600; }
.alert .dt { font-size: 13px; color: var(--fg-2); word-break: break-word; }
.ok-banner { padding: 10px 12px; border-radius: 10px; background: var(--surface); border: 1px solid var(--border); color: var(--fg-2); margin-bottom: 14px; }

/* ---- bảng ---- */
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 6px 4px; border-bottom: 1px solid var(--grid); }
th { color: var(--fg-3); font-weight: 500; font-size: 12.5px; }
td.num, th.num { text-align: right; }
.tablewrap { overflow-x: auto; }

/* ---- biểu đồ ---- */
.chart { position: relative; width: 100%; }
.chart svg { display: block; width: 100%; height: auto; overflow: visible; }
.chart .axis text, .chart text { fill: var(--fg-3); font-size: 11px; }
.chart .gridline { stroke: var(--grid); stroke-width: 1; }
.chart .bar { fill: var(--series-1); }
.chart .bar.soft { fill: var(--series-1-soft); }
.chart .bar.over { fill: var(--critical); }
.chart .line { fill: none; stroke: var(--series-1); stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.chart .area { fill: var(--series-1); opacity: 0.08; }
.chart .ref { stroke: var(--fg-2); stroke-width: 1.5; stroke-dasharray: 5 4; }
.chart .reflbl { fill: var(--fg-2); font-size: 11px; }
.chart .cross { stroke: var(--fg-3); stroke-width: 1; }
.chart .dot { fill: var(--series-1); stroke: var(--surface); stroke-width: 2; }
.chart .hit { fill: transparent; }
.chart .hover { opacity: 0.75; }
.tip {
  position: absolute; pointer-events: none; z-index: 5; background: var(--fg); color: var(--bg);
  font-size: 12.5px; padding: 5px 8px; border-radius: 6px; white-space: nowrap; transform: translate(-50%, -100%);
  margin-top: -8px; display: none;
}
.tip b { font-weight: 650; }

/* ---- health ---- */
.site { display: grid; gap: 8px; }
.site-head { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 8px; }
.site-head h2 { margin: 0; font-size: 16px; flex: 1 1 auto; min-width: 0; overflow-wrap: anywhere; }
.site-stats { display: flex; flex-wrap: wrap; gap: 4px 16px; font-size: 13px; color: var(--fg-2); }
.site-stats b { color: var(--fg); font-weight: 650; }
.strip { display: grid; grid-template-columns: repeat(30, 1fr); gap: 2px; position: relative; }
.strip span { height: 28px; border-radius: 3px; background: var(--nodata); }
.strip span.s-good { background: var(--good); }
.strip span.s-warning { background: var(--warning); }
.strip span.s-critical { background: var(--critical); }
.strip-axis { display: flex; justify-content: space-between; font-size: 11px; color: var(--fg-3); }
.legend { display: flex; flex-wrap: wrap; gap: 4px 14px; font-size: 12.5px; color: var(--fg-2); margin-bottom: 10px; }
.legend i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; margin-right: 5px; vertical-align: -1px; }
.reasons { font-size: 13px; color: var(--fg-2); margin: 0; padding-left: 18px; }
details summary { cursor: pointer; color: var(--fg-2); font-size: 13px; }
.row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.spacer { flex: 1; }

/* ---- đăng nhập ---- */
.login { min-height: 100vh; min-height: 100dvh; display: grid; place-items: center; padding: 16px; }
.login form { width: 100%; max-width: 340px; display: grid; gap: 12px; }
.login h1 { margin: 0 0 4px; font-size: 22px; }
.login input, .login button { width: 100%; min-height: 44px; font-size: 16px; }
.login .err { color: var(--critical-ink); font-size: 14px; min-height: 20px; }

@media (max-width: 520px) {
  .tile .val { font-size: 22px; }
  .card { padding: 12px 12px; }
  .strip span { height: 24px; }
  .strip { gap: 1px; }
}
.mt6 { margin-top: 6px; }
.mt14 { margin-top: 14px; }
.mb12 { margin-bottom: 12px; }
h2.sect { font-size: 16px; margin: 22px 0 10px; }
.chart .cross, .chart .dot { display: none; }
#budgetForm { flex-wrap: nowrap; }
#budgetIn { flex: 1; min-width: 0; width: 100%; }

/* ---- chuỗi phân loại (thứ tự cố định) ---- */
:root { --s1: #2a78d6; --s2: #eb6834; --s3: #1baf7a; --s4: #eda100; --s5: #e87ba4; --s6: #008300; }
@media (prefers-color-scheme: dark) { :root:not([data-theme='light']) { --s1: #3987e5; --s2: #d95926; --s3: #199e70; --s4: #c98500; --s5: #d55181; --s6: #008300; } }
:root[data-theme='dark'] { --s1: #3987e5; --s2: #d95926; --s3: #199e70; --s4: #c98500; --s5: #d55181; --s6: #008300; }
.chart .bar.s1 { fill: var(--s1); } .chart .bar.s2 { fill: var(--s2); } .chart .bar.s3 { fill: var(--s3); }
.chart .bar.s4 { fill: var(--s4); } .chart .bar.s5 { fill: var(--s5); } .chart .bar.s6 { fill: var(--s6); }
.chart g.hover { opacity: 0.75; }
.key { display: flex; flex-wrap: wrap; gap: 2px 12px; font-size: 12.5px; color: var(--fg-2); margin: 0 0 6px; }
.key i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; margin-right: 5px; vertical-align: -1px; }
.key i.s1 { background: var(--s1); } .key i.s2 { background: var(--s2); } .key i.s3 { background: var(--s3); }
.key i.s4 { background: var(--s4); } .key i.s5 { background: var(--s5); } .key i.s6 { background: var(--s6); }
.seg { display: inline-flex; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.seg button { border: none; border-radius: 0; min-height: 32px; padding: 4px 12px; background: var(--surface); }
.seg button[aria-pressed='true'] { background: var(--accent); color: #fff; }
.chead { display: flex; align-items: baseline; gap: 8px; }
.chead h2 { flex: 1; }
.chead .big { font-weight: 650; font-size: 15px; }
.cohort td, .cohort th { white-space: nowrap; font-size: 13px; }
.cohort td.r { text-align: right; }
.review { border-top: 1px solid var(--grid); padding: 8px 0; font-size: 13.5px; }
.review .stars { color: var(--warning-ink); letter-spacing: 1px; }
.alertbar { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin-bottom: 10px; min-height: 28px; }
.chip { min-height: 28px; padding: 2px 10px; border-radius: 999px; font-size: 13px; font-weight: 600; }
.chip.critical { border-color: var(--critical); color: var(--critical-ink); }
.chip.warning { border-color: var(--warning); color: var(--warning-ink); }

/* ---- lịch ---- */
.today-head { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; }
.today-head .big-date { font-size: 22px; font-weight: 700; }
.ev { display: flex; gap: 10px; align-items: flex-start; padding: 8px 0; border-top: 1px solid var(--grid); cursor: pointer; }
.ev:first-child { border-top: none; }
.ev .bar { width: 4px; align-self: stretch; border-radius: 2px; background: var(--s1); flex: none; }
.ev .tm { width: 92px; flex: none; color: var(--fg-2); font-size: 13px; padding-top: 1px; }
.ev .tt { font-weight: 600; }
.ev .nt { font-size: 13px; color: var(--fg-3); }
.ev.sys .tt::after { content: ' 🔒'; font-size: 11px; }
.bar.s1, .dot.s1, .chipev.s1 { --c: var(--s1); } .bar.s2, .dot.s2, .chipev.s2 { --c: var(--s2); } .bar.s3, .dot.s3, .chipev.s3 { --c: var(--s3); }
.bar.s4, .dot.s4, .chipev.s4 { --c: var(--s4); } .bar.s5, .dot.s5, .chipev.s5 { --c: var(--s5); } .bar.s6, .dot.s6, .chipev.s6 { --c: var(--s6); }
.ev .bar, .dot, .chipev { background: var(--c, var(--s1)); }
.daygrp { font-size: 13px; font-weight: 700; color: var(--fg-2); margin: 12px 0 2px; }
.daygrp.today { color: var(--accent); }
.calhead { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; flex-wrap: wrap; }
.calhead h2 { margin: 0; font-size: 17px; min-width: 120px; text-align: center; }
.calgrid { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); border-top: 1px solid var(--grid); border-left: 1px solid var(--grid); }
.calgrid .dh { font-size: 12px; color: var(--fg-3); text-align: center; padding: 4px 0; border-right: 1px solid var(--grid); border-bottom: 1px solid var(--grid); }
.calgrid .cell { min-height: 92px; padding: 3px; border-right: 1px solid var(--grid); border-bottom: 1px solid var(--grid); cursor: pointer; overflow: hidden; }
.calgrid .cell:hover { background: var(--surface-2); }
.calgrid .cell.other { background: var(--bg); }
.calgrid .cell.other .dn { color: var(--fg-3); }
.calgrid .cell.sel { outline: 2px solid var(--accent); outline-offset: -2px; }
.calgrid .dn { font-size: 12px; font-weight: 600; display: inline-block; min-width: 22px; height: 22px; line-height: 22px; text-align: center; border-radius: 11px; }
.calgrid .cell.today .dn { background: var(--accent); color: #fff; }
.chipev { display: block; font-size: 11.5px; line-height: 1.35; padding: 1px 4px; margin-top: 2px; border-radius: 4px; color: #fff; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.dots { display: none; gap: 2px; flex-wrap: wrap; margin-top: 2px; }
.dot { width: 6px; height: 6px; border-radius: 3px; }
.more { font-size: 11px; color: var(--fg-3); margin-top: 1px; }
.numgrid { display: grid; gap: 8px; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); margin-top: 10px; }
.numgrid button { text-align: left; display: block; padding: 8px 10px; }
.numgrid .v { font-size: 18px; font-weight: 700; }
.numgrid .l { font-size: 12.5px; color: var(--fg-2); }
.numgrid .n { font-size: 12px; color: var(--fg-3); }
.numgrid button.bad { border-color: var(--warning); }
.alert .acts { display: flex; gap: 6px; margin-top: 6px; }
.alert .acts button { min-height: 28px; padding: 2px 10px; font-size: 13px; }
dialog { border: 1px solid var(--border); border-radius: 14px; background: var(--surface); color: var(--fg); padding: 16px; width: min(520px, calc(100vw - 24px)); max-height: calc(100dvh - 24px); }
dialog::backdrop { background: rgb(0 0 0 / 0.45); }
dialog h2 { margin: 0 0 10px; font-size: 17px; }
dialog form { display: grid; gap: 10px; }
dialog label { display: grid; gap: 4px; font-size: 13px; color: var(--fg-2); }
dialog input:not([type='checkbox']):not([type='radio']), dialog select, dialog textarea { width: 100%; font: inherit; color: var(--fg); background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 6px 10px; min-height: 38px; }
dialog .frow { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; align-items: end; }
dialog .chk { display: flex; align-items: center; gap: 6px; font-size: 14px; color: var(--fg); min-height: 38px; }
dialog .colors { border: none; padding: 0; margin: 0; display: flex; gap: 8px; }
dialog .colors legend { font-size: 13px; color: var(--fg-2); margin-bottom: 4px; }
dialog .colors label { display: block; }
dialog .colors input { position: absolute; opacity: 0; }
dialog .sw { display: block; width: 26px; height: 26px; border-radius: 13px; border: 3px solid transparent; }
dialog .sw.s1 { background: var(--s1); } dialog .sw.s2 { background: var(--s2); } dialog .sw.s3 { background: var(--s3); }
dialog .sw.s4 { background: var(--s4); } dialog .sw.s5 { background: var(--s5); } dialog .sw.s6 { background: var(--s6); }
dialog .colors input:checked + .sw { border-color: var(--fg); }
dialog .colors input:focus-visible + .sw { outline: 2px solid var(--accent); }
dialog .err { color: var(--critical-ink); font-size: 13px; min-height: 0; }
button.danger { color: var(--critical-ink); }
@media (max-width: 620px) {
  .calgrid .cell { min-height: 54px; }
  .calgrid .chipev, .calgrid .more { display: none; }
  .calgrid .dots { display: flex; }
}

/* ---- phát triển ---- */
.projbar { display: flex; gap: 6px; overflow-x: auto; scrollbar-width: thin; padding-bottom: 6px; margin-bottom: 8px; }
.projbar button { white-space: nowrap; border-radius: 999px; min-height: 32px; padding: 4px 12px; }
.projbar button[aria-pressed='true'] { background: var(--accent); border-color: var(--accent); color: #fff; }
.projbar button[aria-pressed='true'] .muted { color: rgb(255 255 255 / 0.8); }
.filters input[type='search'] { flex: 1 1 180px; min-width: 140px; }
.filters select { min-height: 36px; font: inherit; color: var(--fg); background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 4px 8px; }
.board { display: flex; gap: 10px; overflow-x: auto; padding-bottom: 8px; align-items: flex-start; scroll-snap-type: x proximity; }
.col { flex: 1 0 250px; max-width: 340px; background: var(--surface-2); border-radius: 12px; padding: 8px; scroll-snap-align: start; }
.col-h { font-size: 13px; font-weight: 700; padding: 2px 4px 8px; }
.col-done .col-h { color: var(--good-ink); }
.col-requested .col-h { color: var(--warning-ink); }
.tk { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 8px 10px; margin-bottom: 8px; cursor: pointer; box-shadow: var(--shadow); }
.tk:hover { border-color: var(--fg-3); }
.tk-top { display: flex; align-items: center; gap: 6px; font-size: 12.5px; }
.tk-title { font-weight: 600; margin: 4px 0; line-height: 1.35; overflow-wrap: anywhere; }
.tk-meta { display: flex; gap: 10px; font-size: 12px; color: var(--fg-3); }
.tklist tr[data-tk] { cursor: pointer; }
.tklist tr[data-tk]:hover td { background: var(--surface-2); }
.qrow { display: flex; align-items: center; gap: 8px; padding: 8px 0; border-top: 1px solid var(--grid); cursor: pointer; flex-wrap: wrap; }
.qrow .qn { width: 26px; height: 26px; border-radius: 13px; background: var(--surface-2); text-align: center; line-height: 26px; font-weight: 700; font-size: 13px; }
.qrow .qt { flex: 1 1 200px; }
.prewrap { white-space: pre-wrap; overflow-wrap: anywhere; font-size: 14px; }
dialog.wide { width: min(760px, calc(100vw - 16px)); }
.tk-h { font-size: 19px; margin: 10px 0 2px; }
.tkacts { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin: 14px 0 4px; padding: 10px 0; border-top: 1px solid var(--grid); border-bottom: 1px solid var(--grid); }
.tkacts:empty { display: none; }
.tkacts select, #tkPrio2 { min-height: 36px; font: inherit; color: var(--fg); background: var(--surface); border: 1px solid var(--border); border-radius: 8px; }
.thread { display: grid; gap: 8px; }
.msg { border-left: 3px solid var(--border); padding: 4px 10px; }
.msg.comment { border-left-color: var(--s1); }
.msg.delivery { border-left-color: var(--good); background: color-mix(in srgb, var(--good) 7%, transparent); }
.msg.review { border-left-color: var(--warning); background: color-mix(in srgb, var(--warning) 9%, transparent); }
.msg.event .prewrap { color: var(--fg-2); font-size: 13px; }
#tkCmt textarea { flex: 1; font: inherit; color: var(--fg); background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 6px 10px; min-width: 0; }
.tkform { display: grid; gap: 10px; }
.tkform label { display: grid; gap: 4px; font-size: 13px; color: var(--fg-2); }
.tkform input, .tkform select, .tkform textarea { width: 100%; font: inherit; color: var(--fg); background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 6px 10px; min-height: 38px; }
.tkform .frow { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
#projSet input { width: 100%; min-width: 60px; }
#projSet summary { cursor: pointer; font-size: 14px; }
#whoami { margin-right: 4px; }

[hidden] { display: none !important; }
.bulkbar { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 8px 10px; position: sticky; top: 96px; z-index: 5; }
.bulkbar select { min-height: 32px; font: inherit; color: var(--fg); background: var(--surface); border: 1px solid var(--border); border-radius: 8px; }
.selcell { width: 28px; }
.selcell input { width: 18px; height: 18px; }

/* ==========================================================================================
   GIAO DIỆN v2 — theo phong cách JobHub / WeLearn: nền xám nhạt, card trắng bo 16px, màu chính
   #5c7cfa, chữ Be Vietnam Pro, sidebar trái (desktop), mỗi khu vực một màu nhận diện (--tone).
   ========================================================================================== */
:root {
  --bg: #f8f9fb; --surface: #ffffff; --surface-2: #eef1f6; --border: #dde3e9; --grid: #e9edf2;
  --fg: #161819; --fg-2: #4a5560; --fg-3: #7b868e;
  --accent: #5c7cfa; --accent-strong: #2642f2; --accent-soft: #eff2ff;
  --shadow: 0 1px 2px rgba(24, 37, 55, 0.04), 0 2px 10px rgba(24, 37, 55, 0.04);
  --radius: 16px;
  --t-blue: #4c6ef5; --t-blue-s: #edf2ff; --t-green: #0ca678; --t-green-s: #e6fcf5;
  --t-violet: #7048e8; --t-violet-s: #f3f0ff; --t-orange: #e8590c; --t-orange-s: #fff4e6;
  --t-teal: #1098ad; --t-teal-s: #e3fafc; --t-pink: #d6336c; --t-pink-s: #fff0f6;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    --bg: #0f1218; --surface: #181c25; --surface-2: #1f2430; --border: #2a303d; --grid: #232835;
    --fg: #e7e9ee; --fg-2: #b4bcc8; --fg-3: #8b94a5; --accent: #6f8bff; --accent-strong: #91a7ff; --accent-soft: #1c2340; --shadow: none;
    --t-blue-s: #1f2640; --t-green-s: #12302a; --t-violet-s: #261f40; --t-orange-s: #3a2614; --t-teal-s: #10303a; --t-pink-s: #3a1626;
  }
}
:root[data-theme='dark'] {
  --bg: #0f1218; --surface: #181c25; --surface-2: #1f2430; --border: #2a303d; --grid: #232835;
  --fg: #e7e9ee; --fg-2: #b4bcc8; --fg-3: #8b94a5; --accent: #6f8bff; --accent-strong: #91a7ff; --accent-soft: #1c2340; --shadow: none;
  --t-blue-s: #1f2640; --t-green-s: #12302a; --t-violet-s: #261f40; --t-orange-s: #3a2614; --t-teal-s: #10303a; --t-pink-s: #3a1626;
}
body { font-family: 'Be Vietnam Pro', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; font-size: 14.5px; }
button, input, select, textarea { font-family: inherit; }

/* màu nhận diện từng khu vực */
#tab-cal { --tone: var(--t-blue); --tone-s: var(--t-blue-s); }
#tab-dev { --tone: var(--t-violet); --tone-s: var(--t-violet-s); }
#tab-aws { --tone: var(--t-orange); --tone-s: var(--t-orange-s); }
#tab-health { --tone: var(--t-green); --tone-s: var(--t-green-s); }
#tab-puzzle { --tone: var(--t-teal); --tone-s: var(--t-teal-s); }
#tab-revenue { --tone: var(--t-pink); --tone-s: var(--t-pink-s); }

/* header */
header.top { background: var(--surface); backdrop-filter: none; -webkit-backdrop-filter: none; border-bottom: 1px solid var(--border); padding: max(10px, env(safe-area-inset-top)) 16px 10px; }
.toprow { max-width: none; gap: 10px; }
.toprow h1 { display: flex; align-items: center; gap: 10px; font-size: 18px; font-weight: 700; color: var(--accent); letter-spacing: -0.01em; }
.brand-mark { width: 32px; height: 32px; border-radius: 9px; display: grid; place-items: center; color: #fff; font-size: 14px; font-weight: 700; background: linear-gradient(135deg, #5c7cfa, #2642f2); }
.toprow button { border-radius: 8px; font-weight: 600; }

/* menu tab: mobile = nút trên nền xám, desktop = sidebar trái */
nav.tabs { margin: 10px 0 0; gap: 6px; padding: 4px; background: var(--surface-2); border-radius: 10px; max-width: none; }
nav.tabs button { border: none; border-radius: 8px; padding: 7px 14px; font-weight: 600; font-size: 14px; color: var(--fg-2); background: transparent; min-height: 36px; }
nav.tabs button[aria-selected='true'] { background: var(--accent); color: #fff; box-shadow: 0 2px 6px rgba(76, 110, 245, 0.25); }
@media (min-width: 1024px) {
  header.top { position: sticky; }
  nav.tabs { position: fixed; top: 61px; left: 0; bottom: 0; width: 224px; margin: 0; flex-direction: column; padding: 16px 12px; gap: 4px;
    background: var(--surface); border-right: 1px solid var(--border); border-radius: 0; overflow-y: auto; }
  nav.tabs button { text-align: left; height: 42px; padding: 0 14px; border-radius: 10px; color: var(--fg); font-weight: 500; }
  nav.tabs button:hover { background: var(--accent-soft); }
  nav.tabs button[aria-selected='true'] { font-weight: 700; }
  main { margin-left: 224px; max-width: 1400px; padding: 20px 28px 48px; }
}

/* card */
.card, .tile, .ok-banner, .alert { border-radius: var(--radius); border-color: var(--border); box-shadow: var(--shadow); }
.card { padding: 16px 18px; }
.card h2 { font-size: 15.5px; font-weight: 700; }
.card h3 { font-size: 13.5px; font-weight: 600; color: var(--fg-2); }
.grid { gap: 16px; }
h2.sect { display: flex; align-items: center; gap: 10px; font-size: 17px; font-weight: 700; margin: 26px 0 12px; }
h2.sect::before { content: ''; width: 6px; height: 20px; border-radius: 3px; background: var(--tone, var(--accent)); }
h3.sect { display: flex; align-items: center; gap: 8px; }
h3.sect::before { content: ''; width: 4px; height: 14px; border-radius: 2px; background: var(--tone, var(--accent)); }

/* ô số liệu: thẻ có dải màu, xoay vòng 4 màu */
.tiles { gap: 14px; }
.tile { position: relative; padding: 14px 16px 14px 20px; overflow: hidden; }
.tile::before { content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 5px; background: var(--c, var(--t-blue)); }
.tile .lbl { font-weight: 500; }
.tile .val { font-weight: 700; }
.tiles > .tile:nth-child(4n + 1) { --c: var(--t-blue); }
.tiles > .tile:nth-child(4n + 2) { --c: var(--t-green); }
.tiles > .tile:nth-child(4n + 3) { --c: var(--t-violet); }
.tiles > .tile:nth-child(4n + 4) { --c: var(--t-orange); }
.numgrid button { position: relative; border-radius: 14px; padding: 12px 14px 12px 18px; background: var(--surface); border: 1px solid var(--border); overflow: hidden; }
.numgrid button::before { content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 5px; background: var(--c, var(--t-blue)); }
.numgrid button:nth-child(6n + 1) { --c: var(--t-orange); } .numgrid button:nth-child(6n + 2) { --c: var(--t-green); }
.numgrid button:nth-child(6n + 3) { --c: var(--t-teal); } .numgrid button:nth-child(6n + 4) { --c: var(--t-pink); }
.numgrid button:nth-child(6n + 5) { --c: var(--t-blue); } .numgrid button:nth-child(6n + 6) { --c: var(--t-violet); }
.numgrid button.bad { border-color: var(--warning); }
.numgrid .v { font-size: 20px; }

/* nút */
button { border-radius: 8px; font-weight: 600; border-color: var(--border); }
button:hover { border-color: var(--accent); color: var(--accent-strong); }
button.primary, button.primary:hover { background: var(--accent); border-color: var(--accent); color: #fff; }
button.primary:hover { background: var(--accent-strong); }
input, select, textarea { border-radius: 8px; }
.seg { background: var(--surface-2); border: none; border-radius: 10px; padding: 4px; gap: 4px; }
.seg button { border-radius: 8px; background: transparent; font-weight: 600; }
.seg button[aria-pressed='true'] { background: var(--accent); color: #fff; }

/* cảnh báo, pill */
.alertbar .chip { background: var(--surface); }
.alert { border-left-width: 5px; }
.pill { font-weight: 600; }

/* lịch */
.today-head .big-date { color: var(--fg); }
#tab-cal .card:first-child { border-top: 4px solid var(--tone); }
.calgrid { border-radius: 12px; overflow: hidden; border-color: var(--grid); }
.calgrid .dh { background: var(--surface-2); font-weight: 600; color: var(--fg-2); }

/* phát triển */
.projbar button { background: var(--surface); font-weight: 600; }
.projbar button[aria-pressed='true'] { background: var(--tone); border-color: var(--tone); }
.board { gap: 14px; }
.col { background: var(--surface-2); border-radius: 14px; padding: 10px; border-top: 4px solid var(--c, var(--border)); }
.col-requested { --c: var(--t-orange); } .col-backlog { --c: var(--t-blue); } .col-doing { --c: var(--t-violet); }
.col-done { --c: var(--t-green); } .col-accepted { --c: var(--fg-3); } .col-rejected { --c: var(--critical); }
.col-h { color: var(--fg); font-size: 13.5px; }
.col-done .col-h, .col-requested .col-h { color: var(--fg); }
.tk { border-radius: 12px; padding: 10px 12px; }
.tk:hover { border-color: var(--tone); box-shadow: 0 4px 14px rgba(24, 37, 55, 0.08); }
dialog { border-radius: 18px; }

/* bảng */
th { background: var(--surface-2); color: var(--fg-2); font-weight: 600; }
th:first-child { border-top-left-radius: 8px; } th:last-child { border-top-right-radius: 8px; }
th, td { padding: 8px 8px; }

/* đăng nhập */
.login { background: linear-gradient(150deg, #3b5bdb 0%, #5c7cfa 55%, #7048e8 100%); }
.login form { background: var(--surface); padding: 28px; border-radius: 20px; box-shadow: 0 24px 64px rgba(15, 23, 42, 0.3); }
.login h1 { color: var(--accent); }
.login h1 { display: flex; align-items: center; gap: 10px; }
@media (min-width: 1024px) {
  header.top { height: 60px; display: flex; align-items: center; padding: 0 16px; }
  header.top .toprow { width: 100%; }
  nav.tabs { top: 60px; }
}
.filters label { display: inline-flex; align-items: center; gap: 6px; white-space: nowrap; }
/* mục đang mở: luôn nền xanh chữ trắng, kể cả khi rê chuột */
nav.tabs button[aria-selected='true'], nav.tabs button[aria-selected='true']:hover { background: var(--accent); color: #fff; border-color: transparent; }
nav.tabs button:not([aria-selected='true']):hover { background: var(--accent-soft); color: var(--accent-strong); }
.seg button[aria-pressed='true'], .seg button[aria-pressed='true']:hover,
.projbar button[aria-pressed='true'], .projbar button[aria-pressed='true']:hover { color: #fff; }
.projbar button[aria-pressed='true']:hover { background: var(--tone); }
.seg button[aria-pressed='true']:hover { background: var(--accent); }