/* Hallmark · genre: editorial · macrostructure: Workbench · theme: Linen · enrichment: tier A · nav: N6 · footer: Ft2
 * Hallmark · pre-emit critique: P5 H5 E4 S5 R5 V5
 */
:root {
  --color-paper: #f8f4eb;
  --color-paper-deep: #eee8db;
  --color-canvas: #ddd6c8;
  --color-ink: #25231f;
  --color-muted: #716d64;
  --color-line: #c9c1b3;
  --color-line-soft: #ddd6ca;
  --color-accent: #a7352d;
  --color-accent-soft: #efe1dd;
  --color-positive: #46604c;
  --color-white: #fffdfa;
  --color-shadow: rgb(50 42 31 / 14%);
  --font-display: "STSong", "Songti SC", "Noto Serif CJK SC", serif;
  --font-body: "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-kai: "Kaiti SC", "STKaiti", "KaiTi", serif;
  --font-song: "Songti SC", "STSong", "SimSun", serif;
  --font-hei: "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-fangsong: "FangSong", "STFangsong", serif;
  --font-xingkai: "STXingkai", "Xingkai SC", "KaiTi", cursive;
  --font-li: "LiSu", "STLiti", "Baoli SC", serif;
  --radius-small: 3px;
  --radius-medium: 8px;
  --space-1: .375rem;
  --space-2: .625rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
  --space-6: 3rem;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; overflow-x: clip; }
body {
  background: var(--color-paper-deep);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.55;
}
button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; }

.masthead {
  background: var(--color-paper);
  border-block-end: 3px double var(--color-ink);
  padding: var(--space-2) var(--space-3) var(--space-3);
}
.masthead__meta {
  display: flex;
  justify-content: space-between;
  border-block-end: 1px solid var(--color-line);
  padding-block-end: var(--space-1);
  color: var(--color-muted);
  font-family: var(--font-display);
  font-size: 11px;
  letter-spacing: .12em;
}
.masthead__name {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-block: var(--space-3);
}
.masthead__name strong {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 4vw, 2.35rem);
  letter-spacing: .1em;
  line-height: 1;
}
.masthead__name small { color: var(--color-muted); }
.masthead__logo { width: 40px; height: 52px; object-fit: contain; }
.masthead__actions { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.button {
  min-height: 38px;
  border: 1px solid var(--color-ink);
  border-radius: var(--radius-small);
  background: transparent;
  padding: .55rem .9rem;
  white-space: nowrap;
  transition: background-color 160ms ease, color 160ms ease, transform 160ms ease;
}
.button:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible {
  outline: 3px solid var(--color-accent-soft);
  outline-offset: 2px;
}
.button--quiet { border-color: var(--color-line); }
.button--ink { background: var(--color-ink); color: var(--color-paper); }
.button--wide { width: 100%; }

.workspace { min-width: 0; }
.panel {
  background: var(--color-paper);
  border-block-end: 1px solid var(--color-line);
  padding: var(--space-4) var(--space-3);
}
.panel__intro { border-block-end: 1px solid var(--color-line); padding-block-end: var(--space-4); }
.eyebrow { margin: 0 0 var(--space-2); color: var(--color-accent); font-size: 11px; letter-spacing: .16em; }
.panel__intro h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.65rem, 6vw, 2.6rem);
  font-weight: 500;
  overflow-wrap: anywhere;
}
.panel__intro p:last-child { max-width: 38rem; margin-block-end: 0; color: var(--color-muted); }
.field-group { border-block-end: 1px solid var(--color-line); padding-block: var(--space-4); }
.section-label { display: flex; align-items: baseline; gap: var(--space-2); margin-block-end: var(--space-3); }
.section-label span, details summary > span { color: var(--color-accent); font-family: var(--font-display); font-size: 11px; }
.section-label h2 { margin: 0; font-family: var(--font-display); font-size: 1.05rem; font-weight: 600; }
.template-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 6px; }
.template-card {
  min-width: 0;
  min-height: 62px;
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-small);
  background: transparent;
  padding: .65rem;
  text-align: start;
}
.template-card strong { display: block; font-size: 13px; white-space: nowrap; }
.template-card small { display: block; margin-block-start: 2px; color: var(--color-muted); font-size: 10px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.template-card.is-active { border-color: var(--color-accent); background: var(--color-accent-soft); }
.field { display: grid; gap: 5px; margin-block-end: var(--space-3); }
.field > span, .range-field > span { color: var(--color-muted); font-size: 12px; }
.field input, .field textarea, .field select {
  width: 100%;
  min-width: 0;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-small);
  background: var(--color-white);
  padding: .65rem .7rem;
}
.field textarea { resize: vertical; line-height: 1.7; }
.field input[type="color"] { min-height: 42px; padding: 4px; }
.font-picker { margin-block-start: var(--space-1); }
.font-preview {
  display: block;
  min-height: 46px;
  border: 1px solid var(--color-line-soft);
  background: var(--color-white);
  padding: 7px 10px;
  color: var(--color-ink) !important;
  font-family: var(--practice-font-preview);
  font-size: 22px !important;
  letter-spacing: .12em;
}
.field-pair { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: var(--space-2); }
.range-field { display: grid; gap: var(--space-1); margin-block: var(--space-2); }
.range-field span { display: flex; justify-content: space-between; }
input[type="range"] { width: 100%; accent-color: var(--color-accent); }
details summary { display: flex; align-items: center; gap: var(--space-2); cursor: pointer; list-style: none; }
details summary::-webkit-details-marker { display: none; }
details summary small { margin-inline-start: auto; color: var(--color-muted); }
.details-body { padding-block-start: var(--space-3); }
.toggle-field { display: flex; align-items: center; gap: var(--space-2); margin-block: var(--space-2); }
.toggle-field input { accent-color: var(--color-accent); }
.panel__foot { padding-block-start: var(--space-4); }
.panel__foot p { color: var(--color-muted); font-size: 11px; }

.preview-zone { min-width: 0; background: var(--color-canvas); }
.preview-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 56px;
  border-block-end: 1px solid var(--color-line);
  background: var(--color-paper-deep);
  padding-inline: var(--space-3);
}
.preview-toolbar > div { display: flex; align-items: center; gap: var(--space-2); }
.preview-toolbar small { color: var(--color-muted); }
.status-dot { width: 7px; aspect-ratio: 1; border-radius: 50%; background: var(--color-positive); }
.zoom-control { border: 1px solid var(--color-line); border-radius: var(--radius-small); }
.zoom-control button { width: 34px; height: 32px; border: 0; background: transparent; }
.zoom-control output { min-width: 48px; text-align: center; font-size: 11px; }
.paper-stage { min-height: 70svh; overflow: auto; padding: var(--space-4) var(--space-3) var(--space-6); }
#pages { display: grid; justify-content: center; gap: 24px; transform-origin: top center; }
.sheet {
  position: relative;
  overflow: hidden;
  background: var(--color-white);
  box-shadow: 0 8px 30px var(--color-shadow);
  color: var(--color-ink);
  transform-origin: top center;
}
.sheet--a4-portrait { width: 794px; min-height: 1123px; }
.sheet--a4-landscape { width: 1123px; min-height: 794px; }
.sheet--a5-portrait { width: 559px; min-height: 794px; }
.sheet--b5-portrait { width: 665px; min-height: 944px; }
.sheet__inner { padding: 48px 54px 42px; }
.sheet__brandline { display: flex; align-items: center; justify-content: space-between; gap: 18px; border-block-end: 1px solid var(--color-line); padding-block-end: 8px; }
.sheet__brand { display: flex; align-items: center; gap: 8px; }
.sheet__logo { width: 24px; height: 32px; object-fit: contain; }
.sheet__brandname { display: grid; font-family: var(--font-display); font-size: 12px; line-height: 1.1; letter-spacing: .08em; }
.sheet__brandname small { color: var(--color-muted); font-family: var(--font-body); font-size: 7px; letter-spacing: .06em; }
.sheet__brandline > small { color: var(--color-muted); font-size: 8px; letter-spacing: .08em; }
.sheet__head { display: flex; align-items: end; justify-content: space-between; margin-block-start: 10px; border-block-end: 2px solid var(--color-ink); padding-block-end: 9px; }
.sheet__title { margin: 0; font-family: var(--font-kai); font-size: 28px; font-weight: 500; letter-spacing: .12em; }
.sheet__meta { color: var(--color-muted); font-size: 12px; }
.sheet__subtitle { margin: 8px 0 22px; color: var(--color-muted); font-size: 11px; letter-spacing: .1em; }
.practice { display: grid; align-content: start; gap: 14px; }
.practice-row { display: flex; flex-wrap: nowrap; align-items: end; gap: 7px; min-width: 0; }
.practice-label { flex: 0 0 1.3em; font-family: var(--font-kai); color: var(--color-ink); text-align: center; }
.char-block { display: grid; justify-items: center; gap: 3px; }
.pinyin { height: 18px; font-family: var(--font-body); font-size: 11px; }
.cell {
  --cell-size: 64px;
  --practice-grid-color: #b77a74;
  position: relative;
  display: grid;
  flex: 0 0 var(--cell-size);
  width: var(--cell-size);
  height: var(--cell-size);
  place-items: center;
  border: 1px solid var(--practice-grid-color);
  font-family: var(--practice-font);
  font-size: calc(var(--cell-size) * .72);
  line-height: 1;
}
.cell__guide, .cell__guide::before, .cell__guide::after { position: absolute; pointer-events: none; content: ""; }
.grid-tian .cell__guide { inset: 50% 0 auto; border-block-start: 1px dashed var(--practice-grid-color); }
.grid-tian .cell__guide::before { inset: calc(var(--cell-size) / -2) auto auto 50%; height: var(--cell-size); border-inline-start: 1px dashed var(--practice-grid-color); }
.grid-mi {
  background: none;
}
.grid-mi .cell__guide { inset: 0; }
.grid-mi .cell__guide::before {
  inset: 0 auto 0 50%;
  border-inline-start: 1px dashed var(--practice-grid-color);
}
.grid-mi .cell__guide::after {
  inset: 50% 0 auto;
  border-block-start: 1px dashed var(--practice-grid-color);
}
.grid-mi::before,
.grid-mi::after {
  position: absolute;
  z-index: 0;
  inset: 50% auto auto 50%;
  width: 141.5%;
  border-block-start: 1px dashed var(--practice-grid-color);
  content: "";
  pointer-events: none;
  transform-origin: center;
}
.grid-mi::before { transform: translate(-50%, -50%) rotate(45deg); }
.grid-mi::after { transform: translate(-50%, -50%) rotate(-45deg); }
.grid-mi > span { position: relative; z-index: 1; }
.grid-hui .cell__guide { inset: 18%; border: 1px dashed var(--practice-grid-color); }
.grid-none { border-color: transparent; border-block-end-color: var(--practice-grid-color); }
.trace { color: var(--practice-ink-color); opacity: var(--trace-opacity); }
.sample { color: var(--practice-ink-color); opacity: 1; }
.blank { color: transparent; }
.four-line {
  position: relative;
  display: grid;
  width: 100%;
  height: 58px;
  align-items: center;
  border-block: 1px solid var(--practice-grid-color);
  background: linear-gradient(to bottom, transparent 32%, var(--practice-grid-color) 33%, transparent 35%, transparent 65%, var(--practice-grid-color) 66%, transparent 68%);
  font-family: var(--practice-font);
  font-size: 34px;
}
.four-line span { padding-inline: 10px; color: var(--practice-ink-color); }
.four-line .trace-text { opacity: var(--trace-opacity); }
.article-lines { display: grid; gap: 14px; font-family: var(--practice-font); font-size: 22px; line-height: 2.1; }
.article-line { min-height: 46px; border-block-end: 1px solid var(--practice-grid-color); letter-spacing: .28em; }
.vertical-copy { display: flex; flex-direction: row-reverse; gap: 24px; min-height: 700px; font-family: var(--practice-font); font-size: 26px; }
.vertical-copy p { margin: 0; writing-mode: vertical-rl; letter-spacing: .2em; }
.control-line { width: 100%; min-height: 54px; border-block-end: 1px solid var(--practice-grid-color); font-size: 28px; letter-spacing: .45em; color: var(--practice-ink-color); opacity: var(--trace-opacity); overflow: hidden; white-space: nowrap; }
.stroke-section { display: grid; gap: 16px; }
.stroke-sheet-block { display: grid; gap: 5px; padding: 5px; border: 2px solid var(--practice-grid-color); }
.stroke-sequence, .stroke-trace-row { display: grid; grid-template-columns: repeat(var(--stroke-columns), minmax(0, 1fr)); }
.stroke-trace-row { border-block-start: 1px solid var(--practice-grid-color); }
.stroke-step {
  position: relative;
  display: grid;
  min-width: 0;
  aspect-ratio: 1;
  place-items: center;
  border: 1px solid var(--practice-grid-color);
  margin-inline-end: -1px;
  margin-block-end: -1px;
  background-image:
    linear-gradient(to right, transparent 49.5%, color-mix(in srgb, var(--practice-grid-color) 55%, transparent) 50%, transparent 50.5%),
    linear-gradient(to bottom, transparent 49.5%, color-mix(in srgb, var(--practice-grid-color) 55%, transparent) 50%, transparent 50.5%);
}
.stroke-step svg { display: block; width: 100%; height: 100%; }
.stroke-step__fallback { color: var(--practice-ink-color); font-family: var(--practice-font); font-size: calc(var(--cell-size) * .7); }
.stroke-step__loading { color: var(--color-muted); font-size: 8px; }
.stroke-trace-row .cell { width: 100%; height: auto; aspect-ratio: 1; border-block-start: 0; border-inline-start: 0; }
.stroke-trace-row .char-block { gap: 0; }
.stroke-trace-row .cell:first-child { border-inline-start: 1px solid var(--practice-grid-color); }
.sheet__foot { position: absolute; inset: auto 54px 16px; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; border-block-start: 1px solid var(--color-line); padding-block-start: 7px; color: var(--color-muted); font-size: 8px; }
.sheet__foot span:nth-child(2) { text-align: center; }
.sheet__foot span:last-child { text-align: end; }
.preview-note { margin: 0; padding: 0 var(--space-3) var(--space-4); color: var(--color-muted); text-align: center; font-size: 11px; }
.toast {
  position: fixed;
  inset: auto var(--space-3) var(--space-3) auto;
  z-index: 10;
  max-width: calc(100% - 2rem);
  background: var(--color-ink);
  color: var(--color-paper);
  padding: .75rem 1rem;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 180ms ease, transform 180ms ease;
  pointer-events: none;
}
.toast.is-visible { opacity: 1; transform: translateY(0); }

@media (hover: hover) and (pointer: fine) {
  .button:hover { background: var(--color-accent-soft); }
  .button--ink:hover { background: var(--color-accent); color: var(--color-paper); }
  .template-card:hover { border-color: var(--color-accent); }
}
@media (min-width: 40rem) {
  .masthead { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: end; padding-inline: var(--space-4); }
  .masthead__meta { grid-column: 1 / -1; }
  .masthead__actions { justify-content: end; margin-block: var(--space-3); }
  .panel { padding-inline: var(--space-4); }
  .template-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (min-width: 60rem) {
  body { height: 100dvh; overflow: hidden; }
  .masthead { height: 100px; padding-inline: var(--space-5); }
  .masthead__name { margin-block: var(--space-2); }
  .workspace { display: grid; grid-template-columns: 370px minmax(0, 1fr); height: calc(100dvh - 100px); }
  .panel { overflow-y: auto; border-inline-end: 1px solid var(--color-line); border-block-end: 0; padding: var(--space-4); }
  .preview-zone { min-height: 0; overflow: hidden; }
  .paper-stage { height: calc(100dvh - 184px); }
  .template-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 90rem) {
  .workspace { grid-template-columns: 420px minmax(0, 1fr); }
  .panel { padding-inline: var(--space-5); }
}
@media (pointer: coarse) {
  .button, .template-card, .zoom-control button { min-height: 44px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; }
}
@media print {
  body { height: auto; overflow: visible; background: var(--color-white); }
  .masthead, .panel, .preview-toolbar, .preview-note, .toast { display: none !important; }
  .workspace, .preview-zone, .paper-stage, #pages { display: block; height: auto; min-height: 0; overflow: visible; padding: 0; background: transparent; transform: none !important; }
  .sheet { break-after: page; margin: 0; box-shadow: none; transform: none !important; }
  .sheet:last-child { break-after: auto; }
}