:root {
  --paper: #FBFAF6;
  --panel: #F1F2EE;
  --ink: #22262A;
  --ink-soft: #5E6468;
  --grid: #E3B9AE;
  --zhu: #B8321F;
  --zhu-wash: #F8E9E4;
  --kai: "TW-Kai", "Kaiti TC", "STKaiti", "KaiTi", "BiauKai", serif;
  --serif: "EB Garamond", "Iowan Old Style", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --cell: 64px;
}
* { box-sizing: border-box; }
html { background: var(--paper); }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: var(--serif); font-size: 18px; line-height: 1.55; }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--zhu); outline-offset: 2px; }
[lang|="zh"], .zh { font-family: var(--kai); }
button { font: inherit; }

/* Masthead */
.masthead { display: flex; align-items: baseline; justify-content: space-between; flex-wrap: wrap; gap: 8px 24px;
  max-width: 1040px; margin: 0 auto; padding: 22px 20px 14px; border-bottom: 1px solid var(--grid); }
.brand { text-decoration: none; display: flex; align-items: baseline; gap: 10px; }
.brand-zh { font-family: var(--kai); font-size: 30px; color: var(--zhu); }
.brand-en { font-size: 20px; }
nav { display: flex; gap: 20px; font-family: var(--sans); font-size: 15px; }
nav a { text-decoration: none; color: var(--ink-soft); padding-bottom: 2px; border-bottom: 2px solid transparent; }
nav a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--zhu); }

main { max-width: 1040px; margin: 0 auto; padding: 28px 20px 48px; min-height: 60vh; }
.colophon { max-width: 1040px; margin: 0 auto; padding: 18px 20px 32px; font-family: var(--sans); font-size: 13px; color: var(--ink-soft); border-top: 1px solid var(--grid); }

.notice { max-width: 1000px; margin: 14px auto 0; padding: 10px 16px; background: var(--zhu-wash); border-left: 3px solid var(--zhu);
  font-family: var(--sans); font-size: 15px; display: flex; justify-content: space-between; gap: 12px; align-items: center; }
.notice[hidden] { display: none; }
.notice button { background: none; border: none; cursor: pointer; color: var(--ink-soft); font-size: 14px; }
@media (max-width: 1040px) { .notice { margin: 14px 20px 0; } }

h1, h2, h3 { font-weight: 500; line-height: 1.2; }
h2 { font-size: 26px; margin: 0 0 14px; }
.muted { color: var(--ink-soft); }
.sans { font-family: var(--sans); font-size: 15px; }

/* Buttons */
.btn { font-family: var(--sans); font-size: 14px; color: var(--ink); background: transparent; border: 1px solid var(--ink);
  border-radius: 4px; padding: 6px 12px; cursor: pointer; }
.btn:hover { background: var(--panel); }
.btn[aria-pressed="true"], .btn.primary { background: var(--ink); color: var(--paper); }
.btn.primary:hover { background: #3a4045; }
.btn-row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }

/* Syllabus */
.week { margin: 0 0 40px; }
.week-head { display: flex; align-items: baseline; gap: 14px; border-bottom: 1px solid var(--grid); padding-bottom: 6px; margin-bottom: 4px; }
.week-head h2 { margin: 0; }
.item-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 6px 24px; align-items: center;
  padding: 16px 4px; border-bottom: 1px solid #ECE7DF; text-decoration: none; }
.item-row:hover { background: var(--panel); }
.item-zh { font-family: var(--kai); font-size: 30px; line-height: 1.1; }
.item-en { font-size: 19px; }
.item-poet { color: var(--ink-soft); font-size: 16px; }
.item-chars { font-family: var(--kai); font-size: 26px; color: var(--zhu); letter-spacing: .15em; text-align: right; }
.item-chars small { display: block; font-family: var(--sans); font-size: 12px; color: var(--ink-soft); letter-spacing: 0; }
.empty { color: var(--ink-soft); font-style: italic; }

/* Poem page */
.poem-layout { display: grid; grid-template-columns: minmax(0, 1fr) 340px; grid-template-areas: "poem entry" "tr entry";
  grid-template-rows: auto 1fr; column-gap: 40px; align-items: start; }
.poem-main { grid-area: poem; }
.poem-layout .entry { grid-area: entry; }
.poem-layout .translations { grid-area: tr; }
@media (max-width: 860px) { .poem-layout { grid-template-columns: 1fr; grid-template-areas: "poem" "entry" "tr"; grid-template-rows: auto; }
  .poem-layout .entry { margin-top: 28px; } }
.poem-title { margin-bottom: 22px; }
.poem-title .zh { font-size: 46px; line-height: 1.1; display: block; }
.poem-title .en { font-size: 24px; font-style: italic; }
.poem-title .poet { color: var(--ink-soft); font-size: 18px; margin-top: 4px; }
.poem-title .poet .zh { display: inline; font-size: 20px; }
.toolbar { margin: 0 0 20px; }

.grid { display: flex; flex-direction: column; gap: 6px; }
.line-end { margin-bottom: 14px; }
.line { display: flex; flex-wrap: wrap; align-items: flex-start; }
.unit { display: flex; flex-direction: column; align-items: stretch; }
.cells { display: flex; position: relative; }
.cell { width: var(--cell); height: var(--cell); border: 1px solid var(--grid); margin: 0 -1px 0 0; position: relative;
  display: flex; align-items: center; justify-content: center; font-family: var(--kai); font-size: calc(var(--cell) * .62);
  line-height: 1; background: transparent; color: var(--ink); padding: 0; cursor: pointer; }
.cell:hover { background: var(--panel); }
.cell[aria-pressed="true"] { background: var(--zhu-wash); }
.unit.compound .cells::after { content: ""; position: absolute; left: 12px; right: 13px; bottom: 7px; height: 2px; background: var(--ink); pointer-events: none; }
.cell.now::after, .cell.past::after { content: ""; position: absolute; top: 4px; right: 4px; border-radius: 50%; pointer-events: none; }
.cell.now::after { width: 9px; height: 9px; border: 1.6px solid var(--zhu); }
.cell.past::after { width: 6px; height: 6px; background: var(--ink-soft); }
.crib { display: none; width: 0; min-width: 100%; font-size: 14px; font-style: italic; line-height: 1.25; color: var(--ink-soft); text-align: center; padding: 4px 3px 0; }
.show-cribs .crib { display: block; }
.legend { display: flex; gap: 18px; font-family: var(--sans); font-size: 13px; color: var(--ink-soft); margin-top: 14px; }
.legend span::before { content: ""; display: inline-block; margin-right: 6px; border-radius: 50%; vertical-align: 1px; }
.legend .l-now::before { width: 8px; height: 8px; border: 1.5px solid var(--zhu); }
.legend .l-past::before { width: 6px; height: 6px; background: var(--ink-soft); }
@media (max-width: 480px) { :root { --cell: 50px; } .crib { font-size: 12px; } }

/* Translations */
.translations { margin-top: 44px; }
.translations h3 { font-size: 22px; margin: 0 0 12px; }
.tr-list { display: flex; flex-wrap: wrap; gap: 6px 18px; margin-bottom: 18px; font-size: 18px; }
.tr-list button { background: none; border: none; padding: 2px 0; cursor: pointer; color: var(--ink-soft); border-bottom: 1px solid transparent; }
.tr-list button:hover { color: var(--ink); }
.tr-list button[aria-pressed="true"] { color: var(--ink); border-bottom-color: var(--zhu); }
.tr-list .yr { font-size: 15px; }
.tr-title { font-size: 21px; font-style: italic; margin: 0; }
.tr-note { color: var(--ink-soft); margin: 2px 0 0; }
.tr-text { white-space: pre-line; font-size: 19px; line-height: 1.65; max-width: 62ch; margin: 14px 0 0; }

/* Entry panel */
.entry { background: var(--panel); padding: 20px 22px 22px; border-top: 3px solid var(--zhu); position: sticky; top: 16px; }
@media (max-width: 860px) { .entry { position: static; } }
.entry-head { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; }
.entry-char { font-family: var(--kai); font-size: 64px; line-height: 1; }
.entry-simp { font-family: var(--kai); font-size: 30px; color: var(--ink-soft); }
.entry-here { font-family: var(--sans); font-size: 14px; background: var(--zhu-wash); border-left: 3px solid var(--zhu); padding: 6px 10px; margin: 14px 0 0; }
.entry-crib { font-size: 22px; font-weight: 500; margin: 12px 0 0; }
.entry-more { margin: 2px 0 0; color: var(--ink); }
.entry-meta { font-family: var(--sans); font-size: 13px; color: var(--ink-soft); margin: 10px 0 0; }
.entry-links { margin: 12px 0 0; font-size: 16px; }
.entry-links a { font-family: var(--kai); font-size: 22px; text-decoration: none; border-bottom: 1px solid var(--grid); margin-right: 10px; }
.entry-links a:hover { border-bottom-color: var(--zhu); }
.entry-placeholder { color: var(--ink-soft); font-style: italic; margin: 0; }
.writer-wrap { margin-top: 18px; }
.writer { width: 200px; height: 200px; position: relative; background: var(--paper); border: 1px solid var(--grid); }
.writer svg.guide { position: absolute; inset: 0; pointer-events: none; }
.writer .hw { position: absolute; inset: 0; }
.writer-status { font-family: var(--sans); font-size: 13px; color: var(--ink-soft); min-height: 1.4em; margin: 6px 0 8px; }
.form-switch { margin: 0 0 10px; }

/* Index */
.index-section { margin-bottom: 40px; }

/* Flashcards */
.cards-controls { display: flex; flex-wrap: wrap; gap: 14px 24px; align-items: center; margin-bottom: 24px; font-family: var(--sans); font-size: 15px; }
.cards-controls select { font: inherit; padding: 5px 8px; border: 1px solid var(--ink); border-radius: 4px; background: var(--paper); color: var(--ink); }
.card { max-width: 460px; margin: 0 auto; text-align: center; padding: 28px 24px; background: var(--panel); border-top: 3px solid var(--zhu); }
.card-char { font-family: var(--kai); font-size: 120px; line-height: 1.05; }
.card-prompt { font-size: 26px; margin: 8px 0 4px; }
.card-answer { min-height: 70px; margin: 10px 0 16px; }
.card .writer { margin: 10px auto; }
.card .btn-row { justify-content: center; }
.card-count { text-align: center; font-family: var(--sans); font-size: 13px; color: var(--ink-soft); margin-top: 12px; }
.backup { margin-top: 48px; padding-top: 16px; border-top: 1px solid var(--grid); font-family: var(--sans); font-size: 14px; color: var(--ink-soft); }
.backup .btn-row { margin-top: 8px; }

@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }
.title-char { font: inherit; color: inherit; background: none; border: none; padding: 0 1px; margin: 0; cursor: pointer;
  border-bottom: 1px dotted var(--grid); line-height: 1.1; }
.title-char:hover, .title-char.on { background: var(--zhu-wash); border-bottom-color: var(--zhu); }
.brand-zh { letter-spacing: .04em; }