:root {
  /* Bố cục: bàn 12 cung là trung tâm; mực chàm trên giấy men ngọc, son đỏ như dấu triện */
  --bg: #eceee7; --paper: #fafbf7; --ink: #1c2330; --muted: #5d6676; --line: #d3d8cf; --line-strong: #a9b1a6;
  --accent: #b3261e; --accent-soft: #f4dfdb; --gold: #94742a; --good: #2b6a3c; --good-soft: #dfeee2; --bad: #b3261e; --bad-soft: #f6dedb;
  --kim: #6a6f78; --moc: #2e7a3f; --thuy: #1f4f94; --hoa: #c4301f; --tho: #93660f;
  --menh: #fbf1d3; --than: #e5ecf8; --focus: #b3261e;
  --serif: "Spectral", "Noto Serif", Georgia, serif; --sans: "Be Vietnam Pro", system-ui, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f141c; --paper: #171e29; --ink: #e5e9f0; --muted: #a2abba; --line: #2b3442; --line-strong: #47526a;
    --accent: #f07f6c; --accent-soft: #3a1f1d; --gold: #d8b45a; --good: #7cc58c; --good-soft: #1a2e22; --bad: #f08a7a; --bad-soft: #3a1e1c;
    --kim: #c3c8d1; --moc: #7cc98a; --thuy: #86b3f2; --hoa: #ff8c7a; --tho: #e3b55c;
    --menh: #2f2a18; --than: #1c2740; --focus: #f07f6c; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
    --bg: #0f141c; --paper: #171e29; --ink: #e5e9f0; --muted: #a2abba; --line: #2b3442; --line-strong: #47526a;
    --accent: #f07f6c; --accent-soft: #3a1f1d; --gold: #d8b45a; --good: #7cc58c; --good-soft: #1a2e22; --bad: #f08a7a; --bad-soft: #3a1e1c;
    --kim: #c3c8d1; --moc: #7cc98a; --thuy: #86b3f2; --hoa: #ff8c7a; --tho: #e3b55c;
    --menh: #2f2a18; --than: #1c2740; --focus: #f07f6c; color-scheme: dark;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 15px/1.55 var(--sans); }
.wrap { max-width: 1180px; margin: 0 auto; padding-block: 20px 48px; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); }
h1, h2, h3 { font-family: var(--serif); font-weight: 700; line-height: 1.25; margin: 0; text-wrap: balance; }
h1 { font-size: 26px; letter-spacing: .01em; }
h2 { font-size: 20px; margin: 28px 0 10px; }
h3 { font-size: 16px; margin: 18px 0 6px; }
p { margin: 6px 0; }
a { color: var(--accent); }
.sub { color: var(--muted); font-size: 13.5px; }
header.top { display: flex; align-items: flex-end; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 14px; }
header.top .brand { display: flex; gap: 12px; align-items: center; }
.seal { width: 42px; height: 42px; border-radius: 8px; background: var(--accent); color: #fff; display: grid; place-items: center; font: 700 20px var(--serif); flex: none; }
.btn-theme { border: 1px solid var(--line); background: var(--paper); color: var(--ink); border-radius: 8px; padding: 6px 10px; cursor: pointer; font: inherit; font-size: 13px; }

/* form */
form.nhap { background: var(--paper); border: 1px solid var(--line); border-radius: 12px; padding: 14px; display: grid; gap: 10px 14px;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); align-items: end; }
.f { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.f label, .f .lb { font-size: 12.5px; color: var(--muted); font-weight: 600; }
.f input, .f select { font: inherit; padding: 8px 9px; border: 1px solid var(--line-strong); border-radius: 8px; background: var(--bg); color: var(--ink); width: 100%; min-width: 0; }
.f input:focus, .f select:focus, button:focus-visible, summary:focus-visible { outline: 2px solid var(--focus); outline-offset: 1px; }
.date3 { display: grid; grid-template-columns: 1fr 1fr 1.4fr; gap: 6px; }
.seg { display: flex; border: 1px solid var(--line-strong); border-radius: 8px; overflow: hidden; }
.seg label { flex: 1; text-align: center; padding: 8px 4px; cursor: pointer; font-size: 14px; color: var(--ink); font-weight: 500; }
.seg label { position: relative; }
.seg input { position: absolute; inset: 0; width: 100%; height: 100%; margin: 0; opacity: 0; pointer-events: none; }
.seg label:has(input:focus-visible) { outline: 2px solid var(--focus); outline-offset: -2px; }
.seg label:has(input:checked) { background: var(--accent); color: #fff; }
.f label.check, .check { display: flex; flex-direction: row; gap: 6px; align-items: center; font-size: 13.5px; font-weight: 500; color: var(--ink); }
.check input { width: auto; margin: 0; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; }
button.chinh, button.phu { font: inherit; font-weight: 600; border-radius: 8px; padding: 9px 14px; cursor: pointer; border: 1px solid var(--accent); }
button.chinh { background: var(--accent); color: #fff; }
button.phu { background: transparent; color: var(--accent); }
details.tuychon { grid-column: 1 / -1; border-top: 1px dashed var(--line); padding-top: 8px; }
details.tuychon summary { cursor: pointer; font-weight: 600; font-size: 13.5px; color: var(--muted); }
.tc-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 10px 14px; margin-top: 10px; }
.loi { color: var(--bad); font-weight: 600; grid-column: 1 / -1; }

/* tabs */
.tabs { display: flex; gap: 4px; margin: 18px 0 0; border-bottom: 1px solid var(--line); overflow-x: auto; scrollbar-width: none; }
.tabs button { font: inherit; font-weight: 600; background: none; border: 0; border-bottom: 3px solid transparent; padding: 10px 12px; cursor: pointer; color: var(--muted); white-space: nowrap; }
.tabs button[aria-selected="true"] { color: var(--accent); border-color: var(--accent); }
.pane { padding-top: 14px; }
.pane[hidden] { display: none; }

/* board */
.board-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; border-radius: 12px; }
.board { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); grid-template-rows: repeat(4, minmax(178px, auto)); gap: 0;
  border: 2px solid var(--line-strong); border-radius: 12px; overflow: hidden; background: var(--paper); min-width: 720px; }
.cell { border: 1px solid var(--line); padding: 6px 7px 5px; position: relative; display: flex; flex-direction: column; gap: 3px; cursor: pointer; min-width: 0; font-size: 12px; line-height: 1.35; }
.cell:hover { background: color-mix(in srgb, var(--accent-soft) 45%, transparent); }
.cell.sel { box-shadow: inset 0 0 0 2px var(--accent); }
.cell.menh { background: var(--menh); }
.cell.than-c .chuc::after { content: " · THÂN"; color: var(--thuy); }
.cell .hd { display: flex; justify-content: space-between; gap: 4px; align-items: baseline; }
.cell .cc { font-weight: 600; color: var(--muted); font-size: 11.5px; }
.cell .chuc { font: 700 12.5px var(--serif); color: var(--accent); text-transform: uppercase; letter-spacing: .03em; text-align: center; }
.cell .dv { font-weight: 700; color: var(--ink); font-size: 12px; }
.cell .ct { text-align: center; font: 700 13.5px var(--serif); min-height: 18px; }
.cell .ct > span { display: block; }
.cell .vcd { color: var(--muted); font-weight: 400; font-style: italic; font-size: 12px; }
.cell .pt { display: grid; grid-template-columns: 1fr 1fr; gap: 0 6px; font-size: 11.5px; flex: 1; }
.cell .pt div { min-width: 0; }
.cell .pt div > span { display: block; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.cell .pt .r { text-align: right; }
.cell .ft { display: flex; justify-content: space-between; align-items: flex-end; gap: 4px; font-size: 11px; color: var(--muted); border-top: 1px dotted var(--line); padding-top: 2px; }
.cell .luu { display: flex; flex-wrap: wrap; gap: 2px; justify-content: center; }
.chip { display: inline-block; font-size: 10.5px; padding: 0 4px; border-radius: 4px; background: var(--accent-soft); color: var(--accent); font-weight: 600; white-space: nowrap; }
.chip.dv { background: var(--than); color: var(--thuy); }
.chip.ky { background: var(--bad-soft); color: var(--bad); }
.chip.tt { background: var(--ink); color: var(--paper); }
.tag-tt { position: absolute; left: 50%; transform: translateX(-50%); bottom: -1px; background: var(--ink); color: var(--paper); font-size: 10px; padding: 0 5px; border-radius: 4px 4px 0 0; font-weight: 700; z-index: 1; }
.hk-Kim { color: var(--kim); } .hk-Mộc { color: var(--moc); } .hk-Thủy { color: var(--thuy); } .hk-Hỏa { color: var(--hoa); } .hk-Thổ { color: var(--tho); }
.sang { font-family: var(--sans); font-weight: 600; font-size: 10.5px; color: var(--muted); margin-left: 2px; }
.hoa { font-weight: 700; }
.center { grid-column: 2 / 4; grid-row: 2 / 4; border: 1px solid var(--line); padding: 14px 16px; display: flex; flex-direction: column; gap: 6px; cursor: default;
  background: radial-gradient(circle at 50% 40%, var(--accent-soft), transparent 70%), var(--paper); }
.center h2 { margin: 0; font-size: 21px; text-align: center; }
.center .tt { text-align: center; color: var(--muted); font-size: 12.5px; letter-spacing: .12em; text-transform: uppercase; }
.kv { display: grid; grid-template-columns: auto 1fr; gap: 3px 12px; font-size: 13px; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; font-weight: 600; }
.legend { font-size: 12px; color: var(--muted); margin-top: 8px; display: flex; flex-wrap: wrap; gap: 6px 14px; }

/* cards & detail */
.grid2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 14px; }
.card { background: var(--paper); border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; min-width: 0; }
.card h3:first-child { margin-top: 0; }
.detail { margin-top: 14px; }
.star-row { padding: 8px 0; border-top: 1px dashed var(--line); }
.star-row:first-of-type { border-top: 0; }
.star-row b { font-family: var(--serif); }
.muted { color: var(--muted); }
.badge { display: inline-block; font-size: 11.5px; font-weight: 700; padding: 1px 7px; border-radius: 999px; background: var(--accent-soft); color: var(--accent); }
.badge.cat, .badge.tot { background: var(--good-soft); color: var(--good); }
.badge.hung, .badge.xau { background: var(--bad-soft); color: var(--bad); }
.badge.trung { background: var(--than); color: var(--thuy); }
ul.clean { list-style: none; padding: 0; margin: 6px 0; }
ul.clean li { padding: 5px 0; border-top: 1px dashed var(--line); }
ul.clean li:first-child { border-top: 0; }
table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
th, td { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 12px; color: var(--muted); font-weight: 700; }
tr.now td { background: var(--menh); font-weight: 600; }
.tbl { overflow-x: auto; }
.num { font-variant-numeric: tabular-nums; text-align: right; white-space: nowrap; }
details.acc { border: 1px solid var(--line); border-radius: 10px; background: var(--paper); margin: 8px 0; }
details.acc > summary { cursor: pointer; padding: 10px 14px; font-weight: 600; list-style: none; display: flex; justify-content: space-between; gap: 8px; }
details.acc > summary::-webkit-details-marker { display: none; }
details.acc > summary::after { content: "+"; color: var(--muted); }
details.acc[open] > summary::after { content: "–"; }
details.acc > div { padding: 0 14px 12px; }

/* scores */
.scores { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; }
.score { background: var(--paper); border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; }
.score .lb { font-size: 12.5px; color: var(--muted); font-weight: 600; }
.score .val { font: 700 30px/1.1 var(--serif); margin: 4px 0; font-variant-numeric: tabular-nums; }
.score .val small { font-size: 14px; color: var(--muted); font-weight: 400; }
.bar { height: 8px; border-radius: 99px; background: var(--line); overflow: hidden; }
.bar i { display: block; height: 100%; border-radius: 99px; background: var(--gold); }
.bar.hi i { background: var(--good); } .bar.lo i { background: var(--bad); }
.months { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 8px; }
.month { border: 1px solid var(--line); border-radius: 10px; padding: 8px 10px; background: var(--paper); font-size: 12.5px; }
.month.tot { border-color: var(--good); background: var(--good-soft); }
.month.xau { border-color: var(--bad); background: var(--bad-soft); }
.month b { font-family: var(--serif); font-size: 14px; }
.years { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 12px; }
.sig { font-size: 13px; padding: 3px 0 3px 18px; position: relative; }
.sig::before { position: absolute; left: 0; font-weight: 700; }
.sig.vao::before { content: "▲"; color: var(--good); }
.sig.gia::before { content: "◆"; color: var(--gold); }
.sig.ra::before { content: "▼"; color: var(--bad); }
.note { font-size: 12.5px; color: var(--muted); border-left: 3px solid var(--line-strong); padding: 4px 10px; margin: 10px 0; }
textarea.json { width: 100%; min-height: 360px; font: 12px/1.45 ui-monospace, Menlo, Consolas, monospace; background: var(--paper); color: var(--ink); border: 1px solid var(--line-strong); border-radius: 10px; padding: 10px; }
.days td.tot { color: var(--good); font-weight: 700; } .days td.tranh { color: var(--bad); }
.filter { display: flex; gap: 8px; flex-wrap: wrap; align-items: end; margin: 6px 0 10px; }
footer { margin-top: 36px; font-size: 12.5px; color: var(--muted); border-top: 1px solid var(--line); padding-top: 12px; }
.bd-tool { display: none; }
input[type=checkbox] { flex: none; width: 18px; height: 18px; accent-color: var(--accent); vertical-align: -3px; }
@media (max-width: 760px) {
  h1 { font-size: 21px; }
  .board { grid-template-rows: repeat(4, minmax(168px, auto)); }
  .bd-tool { display: flex; justify-content: space-between; align-items: center; gap: 10px; font-size: 12.5px; color: var(--muted); margin-bottom: 8px; }
  .bd-tool button { flex: none; padding: 7px 10px; font-size: 12.5px; }
  .board-wrap.gon .board { min-width: 0; grid-template-rows: repeat(4, minmax(96px, auto)); }
  .board-wrap.gon .cell { padding: 4px 3px 3px; font-size: 10.5px; gap: 2px; }
  .board-wrap.gon .cell .pt, .board-wrap.gon .cell .ft span:first-child { display: none; }
  .board-wrap.gon .cell .hd { flex-wrap: wrap; gap: 0 2px; }
  .board-wrap.gon .cell .chuc { order: -1; width: 100%; font-size: 10.5px; letter-spacing: 0; line-height: 1.2; }
  .board-wrap.gon .cell .cc { font-size: 9.5px; font-weight: 500; }
  .board-wrap.gon .cell .dv { font-size: 10px; }
  .board-wrap.gon .cell .ct { font-size: 11.5px; line-height: 1.25; flex: 1; }
  .board-wrap.gon .cell .vcd { font-size: 10px; }
  .board-wrap.gon .sang { font-size: 9px; margin-left: 1px; }
  .board-wrap.gon .chip { font-size: 9px; padding: 0 2px; }
  .board-wrap.gon .cell .ft { font-size: 9.5px; justify-content: flex-end; }
  .board-wrap.gon .tag-tt { font-size: 8.5px; padding: 0 3px; white-space: nowrap; }
  .board-wrap.gon .center { padding: 8px 6px; gap: 3px; }
  .board-wrap.gon .center h2 { font-size: 15px; line-height: 1.2; }
  .board-wrap.gon .center .tt { font-size: 9.5px; letter-spacing: .08em; }
  .board-wrap.gon .kv { grid-template-columns: 1fr; gap: 0; font-size: 11px; }
  .board-wrap.gon .kv dt { font-size: 9.5px; margin-top: 3px; }
  .board-wrap.gon .phu { display: none; }
}

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