[hidden] { display: none !important; }
:root {
  --bg: #f6f1e7; --paper: #fffdf8; --ink: #23201b; --muted: #6f675b; --line: #e3d9c6;
  --accent: #9b2c2c; --accent-soft: #f6e3df; --gold: #a07a2c; --ok: #2f6b3a; --warn: #a15c07; --bad: #9b2c2c;
  --radius: 10px;
  font-family: "Be Vietnam Pro", "Segoe UI", system-ui, -apple-system, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #17150f; --paper: #211e17; --ink: #efe8da; --muted: #a79d8b; --line: #3a3427; --accent: #e07a6e; --accent-soft: #3b2420; --gold: #d0a85a; --ok: #7cc28a; --warn: #e0a24f; --bad: #e07a6e; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); line-height: 1.55; }
.wrap { max-width: 1100px; margin: 0 auto; padding: 0 16px; }
.top { background: var(--ink); color: var(--paper); padding: 22px 0 18px; }
.top h1 { margin: 0; font-family: Georgia, "Times New Roman", serif; font-size: 30px; letter-spacing: .5px; }
.top h1 span { font-size: 17px; font-weight: 400; opacity: .8; margin-left: 8px; }
.top .sub { margin: 4px 0 0; opacity: .7; font-size: 14px; }
@media (prefers-color-scheme: dark) { .top { background: #0d0c09; color: var(--ink); } }

.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; padding-top: 20px; padding-bottom: 20px; }
.card { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 20px; min-width: 0; }
.card.wide { grid-column: 1 / -1; }
@media (max-width: 860px) { .grid { grid-template-columns: 1fr; } }
h2 { margin: 0 0 12px; font-family: Georgia, serif; font-size: 20px; color: var(--accent); }
h3 { margin: 18px 0 8px; font-size: 16px; }
label { display: flex; flex-direction: column; gap: 4px; font-size: 14px; color: var(--muted); margin-bottom: 10px; }
label:has(input[type=checkbox]) { flex-direction: row; align-items: center; color: var(--ink); }
textarea, select, input[type=datetime-local] {
  font: inherit; color: var(--ink); background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; width: 100%;
}
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: flex-end; }
.row > label { margin-bottom: 10px; }
.grow { flex: 1 1 220px; }
button { font: inherit; cursor: pointer; border-radius: 8px; padding: 8px 14px; border: 1px solid var(--ink); background: var(--ink); color: var(--paper); margin-bottom: 10px; }
button.ghost { background: transparent; color: var(--ink); border-color: var(--line); }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }
button:disabled { opacity: .5; cursor: not-allowed; }
.hint { font-size: 13px; color: var(--muted); margin: 0 0 10px; }
.err { color: var(--bad); font-size: 14px; }
.calinfo { font-size: 14px; background: var(--bg); border-radius: 8px; padding: 8px 12px; margin-bottom: 10px; }
.calinfo b { color: var(--accent); }
details { margin-top: 6px; } summary { cursor: pointer; font-size: 14px; color: var(--muted); }

.tabs { display: flex; gap: 6px; margin-bottom: 12px; flex-wrap: wrap; }
.tabs button { background: transparent; color: var(--muted); border: 1px solid var(--line); margin: 0; }
.tabs button.active { background: var(--accent-soft); color: var(--accent); border-color: var(--accent); font-weight: 600; }

.coins { display: flex; gap: 12px; min-height: 64px; align-items: center; margin-bottom: 10px; }
.coin { width: 54px; height: 54px; border-radius: 50%; display: grid; place-items: center; font-weight: 700; font-size: 13px;
  border: 3px double var(--gold); color: var(--gold); background: radial-gradient(circle at 35% 30%, #f3e2b6, #c9a45a); text-align: center; line-height: 1.1; }
.coin.T { background: radial-gradient(circle at 35% 30%, #efe9dc, #b8ad97); color: #4b4436; border-color: #8c826d; }
.coin.spin { animation: spin .5s linear; }
@keyframes spin { from { transform: rotateY(0) } to { transform: rotateY(720deg) } }
.toss-rows { display: grid; gap: 6px; }
.toss-row { display: grid; grid-template-columns: 56px 1fr 92px; gap: 8px; align-items: center; font-size: 14px; }
.toss-row select { padding: 5px 8px; }

.line { display: inline-block; width: 92px; height: 12px; position: relative; vertical-align: middle; }
.line i { position: absolute; top: 0; height: 12px; background: var(--ink); border-radius: 2px; }
.line.yang i { left: 0; right: 0; }
.line.yin i:first-child { left: 0; width: 42%; } .line.yin i:last-child { right: 0; width: 42%; }
.line.moving i { background: var(--accent); }
.mark { font-weight: 700; color: var(--accent); margin-left: 6px; font-size: 13px; }

.hexhead { display: flex; gap: 10px; flex-wrap: wrap; align-items: baseline; margin-bottom: 10px; }
.hexhead .name { font-family: Georgia, serif; font-size: 22px; font-weight: 700; }
.hexhead .arrow { color: var(--muted); }
.tag { display: inline-block; font-size: 12px; padding: 1px 8px; border-radius: 99px; background: var(--bg); border: 1px solid var(--line); color: var(--muted); }
.tag.hot { background: var(--accent-soft); color: var(--accent); border-color: var(--accent); }
.table-scroll { overflow-x: auto; }
table.hex { border-collapse: collapse; width: 100%; font-size: 14px; min-width: 760px; }
table.hex th { text-align: left; font-weight: 600; color: var(--muted); font-size: 12px; border-bottom: 1px solid var(--line); padding: 6px; }
table.hex td { border-bottom: 1px solid var(--line); padding: 8px 6px; vertical-align: middle; }
table.hex tr.dung { background: var(--accent-soft); }
table.hex tr.the td:first-child { box-shadow: inset 3px 0 var(--gold); }
.st { font-weight: 600; font-size: 13px; padding: 1px 8px; border-radius: 6px; white-space: nowrap; }
.st-Quá-vượng, .st-Vượng { color: var(--ok); background: color-mix(in srgb, var(--ok) 12%, transparent); }
.st-Hưu { color: var(--warn); background: color-mix(in srgb, var(--warn) 12%, transparent); }
.st-Suy, .st-Vô-căn { color: var(--bad); background: color-mix(in srgb, var(--bad) 12%, transparent); }
.flags { display: flex; flex-wrap: wrap; gap: 4px; }
.flags span { font-size: 12px; background: var(--bg); border: 1px solid var(--line); border-radius: 6px; padding: 0 6px; }
.role { font-size: 12px; color: var(--muted); }
.findings { padding-left: 20px; font-size: 14px; } .findings li { margin-bottom: 4px; }
.md { font-size: 15px; } .md h1, .md h2, .md h3 { color: var(--ink); font-family: Georgia, serif; margin: 16px 0 6px; font-size: 18px; }
.md p { margin: 8px 0; } .md ul { padding-left: 20px; }
.md .cursor::after { content: "▍"; animation: blink 1s steps(1) infinite; color: var(--accent); }
@keyframes blink { 50% { opacity: 0; } }
.history { list-style: none; padding: 0; margin: 0; font-size: 14px; }
.history li { border-bottom: 1px solid var(--line); padding: 6px 0; }
.history .h-row { display: flex; gap: 10px; justify-content: space-between; }
.history .thucte { margin-top: 4px; }
.history .thucte label { display: block; margin: 4px 0; }
.history .thucte textarea, .history .thucte input { width: 100%; box-sizing: border-box; }
.badge { font-size: 11px; padding: 1px 6px; border-radius: 8px; background: var(--line); }
#export-btn { margin-top: 8px; }
.history button { margin: 0; padding: 2px 10px; font-size: 13px; }
.foot { color: var(--muted); font-size: 13px; padding-bottom: 30px; }

.keypoints li { padding: 4px 8px; border-left: 3px solid var(--line); margin-bottom: 6px; list-style: none; }
.keypoints { padding-left: 0; }
.keypoints li.kp-bad { border-color: var(--bad); }
.keypoints li.kp-good { border-color: var(--ok); }
.keypoints li.kp-mid { border-color: var(--warn); }
.st-Có-khí { color: var(--warn); background: color-mix(in srgb, var(--warn) 12%, transparent); }

#ungky li.uk-main { font-size: 15px; }

/* ---------- chế độ giải thích ---------- */
.h2row { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px; }
.h2row h2 { margin-bottom: 8px; }
label.switch { flex-direction: row; align-items: center; gap: 6px; margin: 0 0 8px; color: var(--ink); cursor: pointer; }
label.switch input { width: auto; }
body:not(.explain-mode) .explain-only { display: none !important; }
/* nguồn: chữ thường khi tắt, nút tra cứu khi bật */
button.ref { all: unset; font: inherit; color: inherit; }
body.explain-mode button.ref { cursor: pointer; color: var(--accent); text-decoration: underline dotted; text-underline-offset: 2px; }
body.explain-mode button.ref:hover, body.explain-mode button.ref:focus-visible { background: var(--accent-soft); outline: none; border-radius: 3px; }
#explain-box { border: 1px dashed var(--gold); border-radius: 10px; padding: 10px 14px; margin: 14px 0; background: var(--bg); }
#explain-box h3 { margin-top: 4px; color: var(--gold); }
#explain-box details { margin: 6px 0; }
#explain-box summary { cursor: pointer; font-weight: 600; }
#explain-box ul { margin: 6px 0 6px 18px; padding: 0; font-size: 14px; }
#explain-box ol.steps { margin: 4px 0 6px 18px; padding: 0; font-size: 13px; color: var(--muted); }
#explain-box ol.steps b { color: var(--ink); }
#explain-box dl { margin: 6px 0; font-size: 14px; }
#explain-box dt { font-weight: 600; margin-top: 6px; }
#explain-box dd { margin: 2px 0 0 0; color: var(--muted); }
.explain-ai { border-left: 3px solid var(--gold); padding-left: 12px; margin-top: 10px; }
#explain-ai-wrap { margin-top: 14px; }
.src-panel { position: fixed; top: 0; right: 0; bottom: 0; width: min(520px, 100vw); background: var(--paper); border-left: 1px solid var(--line);
  box-shadow: -6px 0 24px rgba(0,0,0,.15); padding: 14px 16px; overflow-y: auto; z-index: 50; }
.src-head { display: flex; justify-content: space-between; align-items: center; gap: 8px; position: sticky; top: -14px; background: var(--paper); padding: 4px 0 8px; }
.src-head button { margin: 0; }
.src-panel h4 { margin: 12px 0 4px; font-size: 14px; color: var(--accent); }
.src-panel .rb { font-size: 14px; border-bottom: 1px solid var(--line); padding: 6px 0; white-space: pre-wrap; }
.src-panel .rb .sec { display: block; font-size: 12px; color: var(--muted); }
.src-panel details.rb summary.sec { display: list-item; cursor: pointer; }
.src-panel pre.book { white-space: pre-wrap; font: 13px/1.55 Georgia, serif; background: var(--bg); padding: 10px; border-radius: 8px; }

.mdtable { border-collapse: collapse; font-size: 13px; margin: 6px 0; }
.mdtable th, .mdtable td { border: 1px solid var(--line); padding: 3px 8px; text-align: left; }