/* 墨卷 — xuan paper, black ink, 山水, and the red 硃批 seal. */
:root {
  --paper: #f3eee2;
  --grid: #dcd4c3;
  --sheet: #fbf8f1;
  --rule: #cfc6b3;
  --cover: #1d1d1d;        /* ink */
  --cover-deep: #0e0e0e;
  --ink2: #3a3a3a;
  --red: #b8322c;          /* 印泥 seal red */
  --red-ink: rgba(184, 50, 44, .92);
  --graphite: #232323;
  --pencil: #6b6560;
  --green: #4f8a67;
  --amber: #c98a1c;
  --violet: #5b4fb8;
  --focus: #8a5a2b;
  --kai: "Kaiti TC", "BiauKai", "DFKai-SB", "STKaiti", "KaiTi", "Noto Serif TC", "Noto Serif CJK TC", "Songti TC", serif;
  --display: "Noto Serif TC", "Noto Serif CJK TC", "Songti TC", "PMingLiU", "Source Han Serif TC", serif;
  --body: -apple-system, "PingFang TC", "Noto Sans TC", "Noto Sans CJK TC", "Microsoft JhengHei", system-ui, sans-serif;
  --cell: 24px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; color: var(--graphite); font-family: var(--body); font-size: 16px; line-height: 1.55;
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: var(--cell) var(--cell);
  background-position: 0 0;
  min-height: 100vh;
  padding-bottom: env(safe-area-inset-bottom);
}
main { max-width: 720px; margin: 0 auto; padding: 14px 12px 56px; }
h1, h2, h3 { font-family: var(--display); font-weight: 600; letter-spacing: .01em; margin: 0; }
.h { font-size: 18px; }
small { font-size: 13px; color: var(--pencil); font-weight: 400; }
.muted { color: var(--pencil); font-size: 13px; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation: none !important; transition: none !important; } }

/* ------------------------------------------------------------ cover bar */
.cover-bar {
  position: sticky; top: 0; z-index: 10; background: var(--cover); color: #fff;
  background-image: linear-gradient(180deg, #262626, #171717);
  display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 10px;
  padding: 8px 12px; box-shadow: inset 0 -3px 0 var(--cover-deep);
}
.brand {
  font-family: var(--kai); color: var(--cover); text-decoration: none; display: inline-flex; align-items: center; gap: 8px;
  background: var(--sheet); padding: 3px 10px 3px 12px; border-radius: 2px; border: 1px solid #d9d1bf; line-height: 1.4;
}
.brand-main { font-size: 22px; font-weight: 700; color: var(--cover); letter-spacing: .1em; filter: url(#brush); }
.brand-sub { font-size: 13px; color: var(--pencil); font-family: var(--body); }
/* red 印章 seal */
.seal { display: inline-grid; place-items: center; background: var(--red); color: #fff; font-family: var(--kai); font-weight: 700; line-height: 1;
  border-radius: 3px; box-shadow: inset 0 0 0 2px var(--red), inset 0 0 0 3px rgba(255,255,255,.85); filter: url(#seal-rough); transform: rotate(-4deg); }
.seal-sm { width: 26px; height: 26px; font-size: 10px; letter-spacing: 0; writing-mode: vertical-rl; }
.seal-md { width: 52px; height: 52px; font-size: 20px; writing-mode: vertical-rl; letter-spacing: .05em; }
.seal-lg { width: 112px; height: 112px; font-size: 54px; transform: rotate(-3deg); }
.views { display: flex; gap: 2px; justify-content: center; }
.view-btn {
  font: inherit; font-size: 15px; color: rgba(255,255,255,.78); background: transparent; border: 0; padding: 8px 12px;
  border-bottom: 2px solid transparent; cursor: pointer;
}
.view-btn.active { color: #fff; border-bottom-color: #fff; }
.account { position: relative; }
.account-btn {
  font: inherit; font-size: 14px; color: #fff; background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.28);
  padding: 6px 12px; border-radius: 999px; cursor: pointer; max-width: 40vw; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.menu {
  position: absolute; right: 0; top: calc(100% + 6px); background: #fff; color: var(--graphite); min-width: 200px;
  border: 1px solid var(--rule); border-radius: 6px; box-shadow: 0 10px 30px rgba(20,40,70,.2); padding: 6px; z-index: 20;
}
.menu-status { font-size: 12px; color: var(--pencil); padding: 6px 10px 8px; border-bottom: 1px solid var(--rule); margin-bottom: 4px; }
.menu-item { display: block; width: 100%; text-align: left; font: inherit; font-size: 15px; background: none; border: 0; padding: 9px 10px; border-radius: 4px; cursor: pointer; }
.menu-item:hover { background: #f1f5fa; }

/* ------------------------------------------------------------ step rail */
.rail { list-style: none; margin: 4px 0 14px; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); background: var(--sheet); border: 1px solid var(--rule); border-radius: 4px; overflow: hidden; }
.rail li { padding: 9px 8px; text-align: center; font-size: 15px; color: var(--pencil); border-bottom: 3px solid transparent; display: flex; gap: 6px; justify-content: center; align-items: center; }
.rail li + li { border-left: 1px solid var(--rule); }
.rail-no { font-family: var(--display); font-size: 13px; width: 20px; height: 20px; border-radius: 50%; border: 1px solid currentColor; display: inline-grid; place-items: center; }
.rail li.active { color: var(--cover); font-weight: 600; border-bottom-color: var(--red); }
.shanshui-band { height: 96px; margin: -14px -12px 14px; background: url("/static/shanshui.svg") center bottom / cover no-repeat; border-bottom: 1px solid var(--rule); opacity: .95; }
.rail li.done { color: var(--green); }
.rail li.done .rail-no { background: var(--green); color: #fff; border-color: var(--green); }

/* ------------------------------------------------------------ sheets */
.sheet { background: var(--sheet); border: 1px solid var(--rule); border-radius: 4px; padding: 14px; margin-bottom: 12px; }
details.sheet summary { cursor: pointer; font-weight: 600; list-style: none; display: flex; justify-content: space-between; align-items: center; }
details.sheet summary::-webkit-details-marker { display: none; }
details.sheet summary::after { content: "＋"; color: var(--pencil); font-weight: 400; }
details.sheet[open] summary::after { content: "－"; }
.summary-hint { font-weight: 400; font-size: 13px; color: var(--pencil); margin-left: auto; margin-right: 10px; }
.settings { display: grid; gap: 14px; margin-top: 14px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field.grow { flex: 1; min-width: 160px; }
.field-name { font-weight: 600; font-size: 14px; display: flex; gap: 8px; align-items: baseline; flex-wrap: wrap; }
textarea, input[type=text], input[type=number], input[type=search], input[type=password], select {
  width: 100%; font: inherit; padding: 10px 12px; border: 1px solid var(--rule); border-radius: 4px; background: #fff; color: var(--graphite);
}
textarea { resize: vertical; line-height: 1.9; font-size: 17px; }
#reference { background-image: repeating-linear-gradient(transparent 0, transparent calc(1.9em - 1px), var(--grid) calc(1.9em - 1px), var(--grid) 1.9em); background-attachment: local; }
.check { display: flex; gap: 10px; align-items: flex-start; font-size: 15px; }
.check input { margin-top: 5px; }
.check span { display: flex; flex-direction: column; }
.row { display: flex; gap: 10px; align-items: center; }
.row.between { justify-content: space-between; }
.row.wrap { flex-wrap: wrap; }
.note { margin: 10px 0 0; font-size: 14px; color: var(--cover); }
.form-error { margin: 10px 0 0; color: var(--red); font-size: 14px; }
.warn { background: #fff8e8; border: 1px solid #f0d7a0; color: #6b4a00; padding: 10px 12px; border-radius: 4px; margin-bottom: 12px; font-size: 14px; }

/* ------------------------------------------------------------ buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px; font: inherit; font-weight: 600; font-size: 15px;
  padding: 11px 18px; border-radius: 4px; border: 1px solid var(--cover); background: #fff; color: var(--cover); cursor: pointer; text-decoration: none;
}
.btn.primary { background: var(--cover); color: #fff; }
.btn.primary:disabled { opacity: .4; cursor: not-allowed; }
.btn.quiet { border-color: var(--rule); color: var(--graphite); }
.btn.danger { color: var(--red); }
.btn.small { padding: 8px 12px; font-size: 14px; }
.btn.stamp { background: var(--cover); border-color: var(--cover); color: #fff; font-family: var(--kai); font-size: 18px; letter-spacing: .3em; padding-left: 26px; }
.actions { display: flex; gap: 10px; justify-content: flex-end; margin: 6px 0 18px; flex-wrap: wrap; }
.actions .primary { flex: 1; min-width: 180px; }
.seg { display: flex; border: 1px solid var(--rule); border-radius: 4px; overflow: hidden; margin-bottom: 14px; }
.seg-btn { flex: 1; border: 0; background: #fff; font: inherit; font-weight: 600; padding: 10px; color: var(--pencil); cursor: pointer; }
.seg-btn + .seg-btn { border-left: 1px solid var(--rule); }
.seg-btn.active { background: var(--cover); color: #fff; }
.search { max-width: 220px; }

/* ------------------------------------------------------------ upload */
.dropzone { display: block; border: 1.5px dashed var(--rule); border-radius: 4px; padding: 24px; text-align: center; cursor: pointer; margin-top: 14px; background: #fcfdff; color: var(--cover); }
.drop-title { font-weight: 600; margin-top: 6px; }
.drop-empty small { display: block; margin-top: 4px; }
.dropzone img { max-width: 100%; max-height: 62vh; border-radius: 3px; }
.progress { display: flex; gap: 14px; align-items: center; margin-top: 14px; }
.spinner { width: 26px; height: 26px; border: 3px solid var(--rule); border-top-color: var(--red); border-radius: 50%; animation: spin 1s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ------------------------------------------------------------ records */
.history { list-style: none; margin: 8px 0 0; padding: 0; }
.history li { display: grid; grid-template-columns: 56px 1fr auto; gap: 12px; align-items: center; padding: 10px 0; border-top: 1px solid var(--rule); }
.history .rec-score { font-family: var(--display); font-size: 22px; color: var(--red); text-align: center; }
.history .rec-score.na { color: var(--pencil); font-size: 14px; }
.history .rec-title { font-weight: 600; }
.history .rec-title a { color: var(--graphite); text-decoration: none; }
.history .rec-meta { font-size: 13px; color: var(--pencil); }
.history .rec-del { border: 0; background: none; color: var(--pencil); cursor: pointer; font: inherit; font-size: 13px; }
.history .rec-del:hover { color: var(--red); }
.empty { color: var(--pencil); padding: 14px 0; }

/* ------------------------------------------------------------ score */
.score-sheet { display: flex; gap: 20px; align-items: center; flex-wrap: wrap; border-left: 4px solid var(--cover); }
.score-block { display: flex; flex-direction: column; align-items: center; gap: 8px; }
.score { display: inline-grid; grid-auto-flow: column; align-items: baseline; gap: 2px; color: #fff; font-family: var(--kai); animation: stamp .35s ease-out; }
.score span:first-child { font-size: 54px; font-weight: 700; line-height: 1; }
@keyframes stamp { from { transform: scale(1.3) rotate(-10deg); opacity: 0; } to { transform: rotate(-3deg); opacity: 1; } }
.score-unit { font-size: 18px; }
.score-title { font-size: 14px; color: var(--pencil); margin-top: 4px; }
.score-meta { flex: 1; min-width: 220px; }
.counts { display: flex; flex-wrap: wrap; gap: 8px; margin: 8px 0 0; }
.count { display: flex; align-items: baseline; gap: 6px; padding: 4px 10px; border-radius: 3px; background: #f2f5f9; font-size: 13px; }
.count dt { color: var(--pencil); }
.count dd { margin: 0; font-weight: 700; font-size: 15px; }
.count.wrong { background: #fdecec; color: #8e1c1c; }
.count.missing { background: #fff3df; color: #6b4600; }
.count.extra { background: #ecebfa; color: #3b3392; }
.count.suspect { background: #fff8e6; color: #7d5400; }

/* ------------------------------------------------------------ viewer */
.viewer-sheet { padding: 10px; }
.toolbar { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; margin-bottom: 8px; }
.tool-group { display: inline-flex; border: 1px solid var(--rule); border-radius: 4px; overflow: hidden; }
.tool { font: inherit; font-size: 14px; padding: 8px 12px; border: 0; background: #fff; cursor: pointer; color: var(--graphite); min-width: 40px; }
.tool + .tool { border-left: 1px solid var(--rule); }
.tool.active { background: var(--cover); color: #fff; }
.toolbar #export { margin-left: auto; }
.viewer { position: relative; width: 100%; max-height: min(72vh, 640px); min-height: 120px; overflow: auto; border-radius: 3px; background: #e7ebf0; touch-action: none; overscroll-behavior: contain; }
.page { position: relative; width: 100%; }
.page img { display: block; width: 100%; height: auto; user-select: none; -webkit-user-drag: none; pointer-events: none; }
.page canvas { position: absolute; left: 0; top: 0; width: 100%; height: 100%; }
.legend { display: flex; flex-wrap: wrap; gap: 12px; font-size: 13px; margin-top: 8px; color: var(--pencil); }
.legend i.lg { display: inline-block; width: 14px; height: 14px; border-radius: 50%; margin-right: 4px; vertical-align: -2px; }
.legend i.red { border: 2px solid var(--red); }
.legend i.orange { border: 2px dashed var(--amber); }
.legend i.caret, .legend i.cross { border: 0; color: var(--red); font-style: normal; font-weight: 800; }
.legend i.caret::before { content: "^"; }
.legend i.cross::before { content: "×"; }

/* ------------------------------------------------------------ mark list */
.mark-list { list-style: none; margin: 8px 0 0; padding: 0; }
.mark-list li { display: grid; grid-template-columns: 52px auto 1fr; gap: 10px; align-items: center; padding: 10px 0; border-top: 1px solid var(--rule); font-size: 15px; cursor: pointer; }
.mark-list li.dismissed { opacity: .5; }
.mark-list li.dismissed .desc { text-decoration: line-through; }
.mark-list canvas.thumb { width: 52px; height: 52px; border: 1px solid var(--rule); border-radius: 3px; background: #fff; }
.mark-list .tag { font-size: 12px; padding: 3px 8px; border-radius: 3px; white-space: nowrap; }
.tag.wrong { background: #fdecec; color: #8e1c1c; }
.tag.missing { background: #fff3df; color: #6b4600; }
.tag.extra { background: #ecebfa; color: #3b3392; }
.tag.suspect { background: #fff8e6; color: #7d5400; }
.tag.punct { background: #eeeeee; color: #555; }
.mark-list .ops { grid-column: 2 / -1; display: flex; gap: 6px; }
.mark-list .ops button { font: inherit; font-size: 13px; padding: 6px 10px; border-radius: 3px; border: 1px solid var(--rule); background: #fff; cursor: pointer; }
.mark-list .ops button.on { background: var(--graphite); color: #fff; border-color: var(--graphite); }
.mark-list .note { margin: 2px 0 0; font-size: 13px; color: var(--pencil); }

table.items { width: 100%; border-collapse: collapse; margin-top: 8px; font-size: 14px; }
table.items th, table.items td { text-align: left; padding: 8px 6px; border-top: 1px solid var(--rule); }
table.items td.bad { color: var(--red); font-weight: 600; }
table.items td.good { color: var(--green); font-weight: 600; }
pre#reading { white-space: pre-wrap; font-family: var(--display); font-size: 17px; line-height: 2; background: #fbfbf8; padding: 10px 12px; border-radius: 3px; margin: 10px 0; }

/* ------------------------------------------------------------ popovers */
.popover {
  position: fixed; z-index: 30; left: 50%; bottom: 12px; transform: translateX(-50%); width: min(440px, calc(100vw - 20px));
  background: #fff; border: 1px solid var(--rule); border-radius: 6px; box-shadow: 0 14px 40px rgba(20,40,70,.25);
}
.pop-head { display: flex; justify-content: space-between; align-items: center; padding: 10px 14px; border-bottom: 1px solid var(--rule); font-weight: 700; }
.pop-head .x { border: 0; background: none; font-size: 22px; cursor: pointer; color: var(--pencil); }
.pop-body { padding: 12px 14px; display: grid; gap: 10px; }
.pop-crop { display: flex; gap: 12px; align-items: center; }
.pop-crop canvas { width: 72px; height: 72px; border: 1px solid var(--rule); border-radius: 3px; background: #fff; flex: none; }
.alts { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; font-size: 13px; color: var(--pencil); }
.alts button { font: inherit; font-size: 15px; padding: 5px 10px; border-radius: 999px; border: 1px solid var(--rule); background: #fff; cursor: pointer; color: var(--graphite); }
.pop-actions { display: flex; gap: 6px; padding: 10px 14px; border-top: 1px solid var(--rule); flex-wrap: wrap; }
.pop-actions .btn { flex: 1; }
.toast { position: fixed; left: 50%; bottom: 20px; transform: translateX(-50%); background: var(--graphite); color: #fff; padding: 10px 16px; border-radius: 4px; font-size: 14px; z-index: 40; }

/* ------------------------------------------------------------ login cover */
body.cover { background: var(--paper) url("/static/shanshui.svg") center bottom / cover no-repeat; color: var(--graphite); }
.cover-page { min-height: 100vh; display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 24px 16px; max-width: none; }
.name-label {
  width: min(380px, 100%); background: rgba(251,248,241,.94); color: var(--graphite); border: 1px solid #d9d1bf; border-radius: 3px; padding: 22px 22px 20px;
  box-shadow: 0 18px 40px rgba(30,25,15,.28), inset 0 0 0 4px rgba(251,248,241,.94), inset 0 0 0 5px var(--cover);
  display: grid; gap: 14px; backdrop-filter: blur(2px);
}
.label-head { display: flex; align-items: center; justify-content: center; gap: 16px; }
.label-title { font-family: var(--kai); font-size: 54px; color: var(--cover); letter-spacing: .18em; padding-left: .18em; filter: url(#brush); }
.label-sub { margin: -8px 0 4px; text-align: center; color: var(--pencil); font-size: 14px; letter-spacing: .3em; }
.label-head { margin-bottom: 6px; }
.label-row { display: grid; grid-template-columns: 56px 1fr; align-items: center; gap: 10px; border-bottom: 1.5px solid var(--cover); padding-bottom: 4px; }
.label-row label { font-family: var(--kai); font-size: 18px; color: var(--cover); }
.label-row input { border: 0; border-radius: 0; padding: 8px 4px; font-size: 17px; background: transparent; }
.label-row input:focus-visible { outline: none; background: #f5f8fc; }
.name-label .stamp { margin-top: 6px; }
.cover-foot { color: var(--pencil); font-size: 13px; margin-top: 18px; text-align: center; background: rgba(243,238,226,.7); padding: 4px 12px; border-radius: 3px; }

@media (max-width: 560px) {
  .cover-bar { grid-template-columns: 1fr auto; row-gap: 2px; }
  .cover-bar .views { grid-column: 1 / -1; justify-content: flex-start; order: 3; margin: 0 -4px; }
  .score-sheet { gap: 12px; }
  .seal-lg { width: 96px; height: 96px; }
  .score span:first-child { font-size: 46px; }
  .history li { grid-template-columns: 48px 1fr; }
  .history .rec-del { grid-column: 2; justify-self: end; }
  .toolbar #export { margin-left: 0; width: 100%; }
}

/* ------------------------------------------------------------ text comparison */
.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 10px; }
.cmp-col { min-width: 0; }
.cmp-title { font-size: 14px; font-weight: 600; color: var(--pencil); margin-bottom: 6px; font-family: var(--body); }
.cmp-text { font-family: var(--display); font-size: 19px; line-height: 2; letter-spacing: .04em; background: #fbfbf8; border: 1px solid var(--rule); border-radius: 3px; padding: 8px 10px; word-break: break-all; overflow-x: auto; }
.cmp-text .ln { display: block; }
.cmp-text .ln:empty::before { content: "　"; }
.cmp-text .c { display: inline-block; min-width: 1em; text-align: center; border-radius: 2px; }
.cmp-text .sub { background: #fde0e0; color: var(--red); box-shadow: inset 0 -2px 0 var(--red); }
.cmp-text .miss { background: #fff1d6; color: #8a5500; box-shadow: inset 0 -2px 0 var(--amber); }
.cmp-text .extra { background: #ecebfa; color: var(--violet); text-decoration: line-through; }
.cmp-text .unread { color: var(--pencil); }
.legend i.sw { display: inline-block; width: 14px; height: 14px; border-radius: 2px; margin-right: 4px; vertical-align: -2px; }
.legend i.sw.sub { background: #fde0e0; box-shadow: inset 0 -2px 0 var(--red); }
.legend i.sw.miss { background: #fff1d6; box-shadow: inset 0 -2px 0 var(--amber); }
.legend i.sw.extra { background: #ecebfa; text-decoration: line-through; }
details.raw { margin-top: 10px; }
details.raw summary { cursor: pointer; font-size: 14px; color: var(--pencil); }
@media (max-width: 560px) { .compare { grid-template-columns: 1fr; } }