/* Single-column workbench. 石青 is the action colour; 朱砂 marks moving lines only. */
:root {
  --paper: #eef0ea; --surface: #f8f9f5; --sunk: #e4e8e1;
  --ink: #1d2321; --muted: #5b655f; --rule: #cfd5cc;
  --accent: #2e5e7a; --accent-ink: #ffffff; --accent-soft: #dce7ec;
  --cinnabar: #b23a2b; --cinnabar-soft: #f3dcd6;
  --alert: #8a4b12; --alert-soft: #f3e6d2;
  --font-display: "LXGW WenKai TC", "Kaiti TC", "BiauKai", "DFKai-SB", "STKaiti", serif;
  --font-ui: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif;
  --step--1: 0.8125rem; --step-0: 0.9375rem; --step-1: 1.125rem; --step-2: 1.5rem; --step-3: 2.25rem;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) { :root {
  --paper: #121715; --surface: #1a201e; --sunk: #222a27;
  --ink: #e2e7e0; --muted: #9aa49e; --rule: #2f3935;
  --accent: #82b2cd; --accent-ink: #0f1a20; --accent-soft: #1f3340;
  --cinnabar: #e2735f; --cinnabar-soft: #3a211c;
  --alert: #e0ad6e; --alert-soft: #33261a;
  color-scheme: dark;
} }

* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--font-ui); font-size: var(--step-0); line-height: 1.7; }
.wrap { max-width: 860px; margin: 0 auto; padding-block: 20px 64px; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); display: grid; grid-template-columns: minmax(0, 1fr); gap: 24px; }
h1, h2, h3 { font-family: var(--font-display); font-weight: 700; text-wrap: balance; margin: 0; line-height: 1.3; }
h1 { font-size: var(--step-3); letter-spacing: 0.08em; }
h2 { font-size: var(--step-2); }
h3 { font-size: var(--step-1); }
p { margin: 0; }
button, input, select, textarea { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.muted { color: var(--muted); }
.small { font-size: var(--step--1); }
.label { font-size: var(--step--1); letter-spacing: 0.12em; color: var(--muted); }

header.top { display: flex; flex-wrap: wrap; align-items: end; justify-content: space-between; gap: 12px 24px; }
header.top .sub { color: var(--muted); font-size: var(--step--1); }
nav.tabs { margin-left: auto; display: flex; gap: 4px; flex-wrap: wrap; }
nav.tabs a { text-decoration: none; color: var(--muted); padding: 6px 12px; border-radius: 6px; font-size: var(--step--1); letter-spacing: 0.06em; }
nav.tabs a[aria-current="page"] { background: var(--ink); color: var(--paper); }

.panel { background: var(--surface); border: 1px solid var(--rule); border-radius: 10px; padding: 20px; display: grid; grid-template-columns: minmax(0, 1fr); gap: 16px; min-width: 0; }
.row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.stack { display: grid; grid-template-columns: minmax(0, 1fr); gap: 8px; min-width: 0; }
.stack.tight { gap: 2px; }
.stack.wide { gap: 24px; }

textarea { width: 100%; background: var(--paper); border: 1px solid var(--rule); border-radius: 6px; padding: 10px 12px; resize: vertical; min-height: 76px; }
textarea[aria-invalid="true"] { border-color: var(--alert); }
textarea[readonly] { color: var(--muted); }
.chip { border: 1px solid var(--rule); background: transparent; border-radius: 999px; padding: 3px 12px; font-size: var(--step--1); color: var(--muted); cursor: pointer; }
.chip:hover { color: var(--ink); border-color: var(--muted); }
.chip:disabled { opacity: 0.45; cursor: not-allowed; }
.btn { border: 1px solid var(--accent); background: var(--accent); color: var(--accent-ink); border-radius: 6px; padding: 8px 18px; cursor: pointer; font-weight: 500; white-space: nowrap; flex: none; }
.btn.ghost { background: transparent; color: var(--accent); }
.btn.quiet { border-color: var(--rule); background: transparent; color: var(--ink); font-weight: 400; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }

.methods { display: grid; grid-template-columns: repeat(auto-fill, minmax(128px, 1fr)); gap: 8px; }
.methods label { border: 1px solid var(--rule); border-radius: 8px; padding: 10px 12px; cursor: pointer; display: grid; gap: 2px; }
.methods input { position: absolute; opacity: 0; pointer-events: none; }
.methods label:has(input:checked) { border-color: var(--accent); background: var(--accent-soft); }
.methods label:has(input:focus-visible) { outline: 2px solid var(--accent); outline-offset: 2px; }
.methods label:has(input:disabled) { cursor: not-allowed; }
.methods b { font-family: var(--font-display); font-size: var(--step-1); font-weight: 700; }
.methods span { font-size: var(--step--1); color: var(--muted); line-height: 1.4; }

.castbox { display: grid; grid-template-columns: minmax(0, 1fr) 150px; gap: 20px; align-items: start; }
.building { justify-items: center; }
@media (max-width: 560px) { .castbox { grid-template-columns: minmax(0, 1fr); } }
.log { display: grid; gap: 6px; font-size: var(--step--1); }
.log .ln { display: grid; grid-template-columns: 3.2em 1fr auto; gap: 8px; align-items: center; padding: 6px 10px; background: var(--paper); border-radius: 6px; font-variant-numeric: tabular-nums; }
.log .ln .v { grid-column: 3; font-family: var(--font-display); font-size: var(--step-0); }
.log .ln.mv .v { color: var(--cinnabar); }
.stalks { min-width: 0; color: var(--muted); }
.manual-options { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 6px; }
.manual-options .btn { display: grid; justify-items: center; padding-inline: 4px; }
.manual-options small { font-size: var(--step--1); font-weight: 400; }
.coins { display: inline-flex; gap: 4px; }
.coin { width: 22px; height: 22px; border-radius: 50%; border: 1.5px solid var(--muted); display: inline-grid; place-items: center; font-size: 11px; font-family: var(--font-display); }
.coin.h { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.cast-numbers { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.cast-number { width: 100%; min-width: 0; background: var(--paper); border: 1px solid var(--rule); border-radius: 6px; padding: 8px 12px; }

/* Hexagram figure */
.gua { display: grid; gap: 7px; width: 132px; max-width: 100%; }
.yao { position: relative; height: 13px; display: flex; gap: 14%; }
.yao i { flex: 1; background: var(--ink); border-radius: 1px; }
.yao.mv i { background: var(--cinnabar); }
.yao .mk { position: absolute; right: -20px; top: -5px; color: var(--cinnabar); font-size: 14px; line-height: 1.6; font-family: var(--font-display); }
.gua.sm { width: 56px; gap: 4px; }
.gua.sm .yao { height: 6px; }
.yao.ph i { background: var(--rule); }

.result-head { display: flex; flex-wrap: wrap; gap: 16px 28px; align-items: center; }
.hexcol { display: grid; gap: 8px; justify-items: center; text-align: center; min-width: 96px; }
.hexcol .nm { font-family: var(--font-display); font-size: var(--step-2); line-height: 1.1; }
.hexcol .fl { font-size: var(--step--1); color: var(--muted); }
.arrow { color: var(--muted); font-size: var(--step-1); }
.q { flex: 1 1 240px; min-width: 0; display: grid; gap: 4px; overflow-wrap: anywhere; }
.q .qt { font-family: var(--font-display); font-size: var(--step-1); }
.q .qc { white-space: pre-wrap; }
@media (max-width: 560px) {
  .result-head { gap: 16px 24px; }
  .hexcol .gua { width: 96px; }
  .q { flex-basis: 100%; }
}
.badge { justify-self: start; font-size: 11px; letter-spacing: 0.1em; padding: 1px 8px; border-radius: 999px; background: var(--sunk); color: var(--muted); }

.rel { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; }
.rel > div { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 10px; align-items: center; background: var(--paper); border-radius: 8px; padding: 10px; min-width: 0; }
.rel .k { font-size: 11px; letter-spacing: 0.12em; color: var(--muted); }
.rel .n { font-family: var(--font-display); font-size: var(--step-1); }
.rel .d { font-size: 11px; color: var(--muted); line-height: 1.4; }
@media (max-width: 560px) { .rel { grid-template-columns: minmax(0, 1fr); } }

.rule { border-left: 3px solid var(--accent); padding: 4px 0 4px 14px; display: grid; gap: 10px; }
.rule .r { font-size: var(--step--1); color: var(--muted); }
.quote { font-family: var(--font-display); font-size: var(--step-1); line-height: 1.8; }
.quote.sec { color: var(--muted); font-size: var(--step-0); }
.quote .src { font-family: var(--font-ui); font-size: 11px; letter-spacing: 0.08em; color: var(--muted); display: block; }

.grid64 { display: grid; grid-template-columns: repeat(8, minmax(0, 1fr)); gap: 6px; }
@media (max-width: 620px) { .grid64 { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
.grid64 a { display: grid; justify-items: center; gap: 6px; padding: 10px 4px 8px; background: var(--surface); border: 1px solid var(--rule); border-radius: 8px; color: inherit; text-decoration: none; }
.grid64 a:hover, .grid64 a[aria-current="true"] { border-color: var(--accent); }
.grid64 .no { font-size: 10px; color: var(--muted); font-variant-numeric: tabular-nums; }
.grid64 .nm { font-family: var(--font-display); font-size: var(--step-0); line-height: 1.1; }
.hexagram-head { gap: 20px; }
.hexagram-head h2:focus { outline: none; }

details.text { border-top: 1px solid var(--rule); padding-top: 12px; }
details.text summary { cursor: pointer; font-size: var(--step--1); color: var(--accent); letter-spacing: 0.06em; }
.classic { display: grid; gap: 14px; margin-top: 14px; }
.classic .blk { display: grid; gap: 2px; }
.classic .t { font-family: var(--font-display); font-size: var(--step-0); line-height: 1.9; white-space: pre-line; }
.classic .x { font-size: var(--step--1); color: var(--muted); }
.classic .blk.hl .t { color: var(--accent); font-weight: 700; }

.interpretation { display: grid; gap: 10px; overflow-wrap: anywhere; }
.interpretation:empty { display: none; }
.interpretation h3 { margin-top: 6px; }
.follow-up { display: grid; gap: 2px; margin-top: 10px; padding-left: 12px; border-left: 2px solid var(--accent); white-space: pre-wrap; }

.dialog { width: min(520px, calc(100vw - 32px)); max-height: calc(100dvh - 32px); margin: auto; padding: 20px; background: var(--surface); color: var(--ink); border: 1px solid var(--rule); border-radius: 10px; }
.dialog::backdrop { background: rgb(0 0 0 / 0.5); }
.dialog input[type="password"], .dialog select { width: 100%; min-width: 0; background: var(--paper); border: 1px solid var(--rule); border-radius: 6px; padding: 8px 12px; }
.key-row { display: flex; gap: 8px; }
.check { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 10px; align-items: start; cursor: pointer; }
.check input { margin-top: 6px; }
.check span { display: grid; }
.row.end { justify-content: flex-end; }

.notice { border-radius: 8px; padding: 10px 14px; font-size: var(--step--1); }
.notice.err { background: var(--alert-soft); color: var(--alert); }

.notice.muted { background: var(--sunk); }
.notice.confirm { background: var(--sunk); display: flex; flex-wrap: wrap; gap: 8px 12px; align-items: center; }
.notice.confirm span { flex: 1 1 200px; min-width: 0; }

.row.spread { justify-content: space-between; }
.records { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: minmax(0, 1fr); gap: 8px; }
.record-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px 12px; align-items: center; background: var(--surface); border: 1px solid var(--rule); border-radius: 8px; padding: 10px 12px; }
.record-actions { display: grid; gap: 6px; }
.record-link { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 14px; align-items: center; color: inherit; text-decoration: none; min-width: 0; overflow-wrap: anywhere; }
.record-link .qt { font-family: var(--font-display); font-size: var(--step-1); line-height: 1.4; }
.record-link:hover .qt { color: var(--accent); }
.record-link .gua.sm .yao .mk { display: none; }
a.small { color: var(--accent); justify-self: start; }

.offscreen { position: fixed; opacity: 0; pointer-events: none; }

footer { font-size: var(--step--1); color: var(--muted); display: grid; gap: 4px; }
@media (prefers-reduced-motion: no-preference) {
  .yao.new { animation: rise .35s ease-out both; }
  @keyframes rise { from { transform: translateY(6px); opacity: .2; } to { transform: none; opacity: 1; } }
}