:root {
  --bg: #f6f5f1;
  --surface: #ffffff;
  --surface-2: #f0efe9;
  --line: #dedbd2;
  --line-strong: #c9c5b9;
  --text: #1f2328;
  --text-2: #5b6168;
  --accent: #1f5fbf;
  --accent-soft: #e6eefb;
  --decel: #c2410c;
  --decel-soft: rgba(194, 65, 12, 0.10);
  --accel: #15803d;
  --accel-soft: rgba(21, 128, 61, 0.10);
  --warn: #b45309;
  --warn-soft: #fdf3e2;
  --danger: #b91c1c;
  --danger-soft: #fdecec;
  --ok: #15803d;
  --ok-soft: #e8f5ec;
  --r1: #2563eb;
  --r2: #9333ea;
  --radius: 8px;
  --font: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Malgun Gothic", "Noto Sans KR", sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text); font: 14px/1.5 var(--font); }
button, input, textarea, select { font: inherit; color: inherit; }
h1, h2, h3 { margin: 0; line-height: 1.3; }
h1 { font-size: 20px; }
h2 { font-size: 16px; }
h3 { font-size: 14px; }
a { color: var(--accent); }
[hidden] { display: none !important; }
.muted { color: var(--text-2); }
.mono { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.small { font-size: 12px; }

/* ---- 공통 부품 ---- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  min-height: 34px; padding: 6px 14px; border-radius: var(--radius);
  border: 1px solid var(--line-strong); background: var(--surface); cursor: pointer; white-space: nowrap;
}
.btn:hover { background: var(--surface-2); }
.btn:disabled { opacity: .45; cursor: default; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { filter: brightness(1.08); }
.btn.danger { color: var(--danger); border-color: #e7b4b4; }
.btn.ghost { border-color: transparent; background: transparent; }
.btn.sm { min-height: 28px; padding: 3px 10px; font-size: 13px; }
.btn:focus-visible, .seg button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 1px;
}

.card { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 16px; }
.stack { display: flex; flex-direction: column; gap: 12px; }
.row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.spacer { flex: 1; }

.chip {
  display: inline-flex; align-items: center; gap: 4px; padding: 1px 8px; border-radius: 999px;
  font-size: 12px; border: 1px solid var(--line); background: var(--surface-2); white-space: nowrap;
}
.chip.todo { color: var(--text-2); }
.chip.draft { background: var(--warn-soft); border-color: #f0d6a8; color: var(--warn); }
.chip.submitted { background: var(--ok-soft); border-color: #b9dfc5; color: var(--ok); }
.chip.ready { background: var(--accent-soft); border-color: #bcd0f2; color: var(--accent); }
.chip.waiting { color: var(--text-2); }
.chip.r1 { color: var(--r1); border-color: #c4d6fb; background: #eef3fe; }
.chip.r2 { color: var(--r2); border-color: #e2c9f7; background: #f6effd; }

.banner { padding: 10px 14px; border-radius: var(--radius); border: 1px solid var(--line); background: var(--surface); }
.banner.warn { background: var(--warn-soft); border-color: #f0d6a8; }
.banner.danger { background: var(--danger-soft); border-color: #f1c0c0; }
.banner.info { background: var(--accent-soft); border-color: #bcd0f2; }

table.grid { border-collapse: collapse; width: 100%; background: var(--surface); }
table.grid th, table.grid td { border-bottom: 1px solid var(--line); padding: 7px 10px; text-align: left; vertical-align: top; }
table.grid th { font-weight: 600; font-size: 12px; color: var(--text-2); background: var(--surface-2); position: sticky; top: 0; }
table.grid tr:hover td { background: #fbfaf7; }
table.grid td.num, table.grid th.num { text-align: right; font-variant-numeric: tabular-nums; }
.table-wrap { overflow: auto; border: 1px solid var(--line); border-radius: 10px; }

/* ---- 레이아웃 ---- */
.topbar {
  position: sticky; top: 0; z-index: 20; display: flex; align-items: center; gap: 10px;
  padding: 10px 16px; background: var(--surface); border-bottom: 1px solid var(--line);
}
.topbar .title { font-weight: 700; }
.page { max-width: 1180px; margin: 0 auto; padding: 20px 16px 60px; display: flex; flex-direction: column; gap: 16px; }

.login { max-width: 380px; margin: 12vh auto; }
.login input { width: 100%; padding: 10px 12px; border: 1px solid var(--line-strong); border-radius: var(--radius);
  font-family: var(--mono); letter-spacing: .12em; text-transform: uppercase; font-size: 18px; }

.progress { height: 6px; border-radius: 3px; background: var(--surface-2); overflow: hidden; }
.progress > div { height: 100%; background: var(--ok); }

/* ---- 판독 화면 ---- */
.reader { display: grid; grid-template-columns: minmax(0, 1fr) 400px; height: calc(100vh - 55px); }
.reader .left { display: flex; flex-direction: column; min-width: 0; border-right: 1px solid var(--line); background: var(--surface); }
.reader .side { overflow-y: auto; padding: 14px; display: flex; flex-direction: column; gap: 14px; background: var(--bg); }
.toolbar { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; padding: 8px 12px; border-bottom: 1px solid var(--line); }
.readout { font-family: var(--mono); font-size: 12px; color: var(--text-2); min-width: 250px; }
.hint { font-size: 12px; color: var(--text-2); }
.trace { display: flex; flex: 1; min-height: 0; overflow: hidden; }
.trace .axis { flex: 0 0 auto; }
.trace .scroller { flex: 1; overflow-x: auto; overflow-y: hidden; position: relative; }
.trace .scroller canvas { position: absolute; left: 0; top: 0; }
.trace .scroller canvas.overlay { cursor: crosshair; }
.trace .scroller canvas.overlay.edge { cursor: ew-resize; }
.trace .scroller canvas.overlay.pick { cursor: pointer; }
.trace-foot { padding: 8px 12px; border-top: 1px solid var(--line); display: flex; gap: 14px; flex-wrap: wrap; font-size: 12px; color: var(--text-2); }
.legend-swatch { display: inline-block; width: 10px; height: 10px; border-radius: 2px; margin-right: 4px; vertical-align: -1px; }

.section { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; }
.section > header { display: flex; align-items: center; gap: 8px; padding: 10px 12px; border-bottom: 1px solid var(--line); }
.section > .body { padding: 10px 12px; display: flex; flex-direction: column; gap: 10px; }
.field .flabel { font-size: 12px; font-weight: 600; color: var(--text-2); margin-bottom: 4px; display: flex; gap: 6px; align-items: baseline; }
.field .flabel .opt { font-weight: 400; }
.field.missing .flabel { color: var(--danger); }
.seg { display: flex; flex-wrap: wrap; gap: 4px; }
.seg button {
  padding: 4px 9px; border-radius: 6px; border: 1px solid var(--line-strong); background: var(--surface);
  cursor: pointer; font-size: 13px; line-height: 1.35;
}
.seg button:hover { background: var(--surface-2); }
.seg button.on { background: var(--accent); border-color: var(--accent); color: #fff; }
.seg button.ne { border-style: dashed; color: var(--text-2); }
.seg button.ne.on { background: var(--text-2); border-color: var(--text-2); border-style: solid; color: #fff; }
.segwrap { display: flex; flex-direction: column; gap: 4px; }
.seg.ne-row { padding-left: 2px; }
.seg button.r1mark { box-shadow: inset 0 -3px 0 var(--r1); }
.seg button.r2mark { box-shadow: inset 0 -3px 0 var(--r2); }
.seg button.r1mark.r2mark { box-shadow: inset 0 -3px 0 var(--r1), inset 0 -6px 0 var(--r2); }
.seg.readonly button, .segwrap.readonly button { cursor: default; }
.field textarea, .field input[type=text], .field input[type=number] {
  width: 100%; padding: 6px 8px; border: 1px solid var(--line-strong); border-radius: 6px; background: var(--surface);
}
.field textarea { min-height: 56px; resize: vertical; }
.conflict { font-size: 12px; margin-top: 4px; display: flex; gap: 6px; flex-wrap: wrap; }
.derived { font-size: 12px; background: var(--surface-2); border-radius: 6px; padding: 6px 8px; }

.evlist { display: flex; flex-direction: column; }
.evrow { display: grid; grid-template-columns: 52px 1fr auto; gap: 8px; align-items: center; padding: 6px 8px;
  border-radius: 6px; cursor: pointer; border: 1px solid transparent; }
.evrow:hover { background: var(--surface-2); }
.evrow.sel { border-color: var(--accent); background: var(--accent-soft); }
.evrow .tag { font-weight: 700; font-size: 12px; }
.evrow .tag.decel { color: var(--decel); }
.evrow .tag.accel { color: var(--accel); }
.evrow.excluded { opacity: .5; text-decoration: line-through; }
.dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }
.dot.done { background: var(--ok); }
.dot.todo { background: var(--danger); }

.timebox { display: flex; gap: 6px; align-items: center; }
.timebox input { width: 76px; font-family: var(--mono); }

/* 시트(대화상자)·메뉴 */
.modal-back { position: fixed; inset: 0; background: rgba(20, 22, 26, .35); z-index: 50; display: flex; align-items: center; justify-content: center; padding: 16px; }
.modal { background: var(--surface); border-radius: 12px; max-width: 560px; width: 100%; max-height: 80vh; overflow: auto; padding: 18px; display: flex; flex-direction: column; gap: 12px; box-shadow: 0 12px 40px rgba(0,0,0,.18); }
.modal ul { margin: 0; padding-left: 18px; }
.popmenu { position: fixed; z-index: 40; background: var(--surface); border: 1px solid var(--line-strong); border-radius: 10px; box-shadow: 0 8px 24px rgba(0,0,0,.14); padding: 6px; display: flex; gap: 6px; }

.toast { position: fixed; top: 14px; left: 50%; transform: translateX(-50%); z-index: 60; background: #1f2328; color: #fff; padding: 9px 16px; border-radius: 10px; box-shadow: 0 8px 24px rgba(0,0,0,.2); max-width: calc(100vw - 32px); }

/* 지침 문서 */
.doc { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 22px 26px; }
.doc h1 { font-size: 22px; margin: 4px 0 12px; }
.doc h2 { font-size: 17px; margin: 22px 0 8px; padding-top: 10px; border-top: 1px solid var(--line); }
.doc h3 { font-size: 15px; margin: 16px 0 6px; }
.doc p, .doc li { line-height: 1.65; }
.doc table { border-collapse: collapse; margin: 8px 0; width: 100%; }
.doc th, .doc td { border: 1px solid var(--line); padding: 5px 8px; text-align: left; vertical-align: top; }
.doc th { background: var(--surface-2); }
.doc blockquote { margin: 8px 0; padding: 6px 12px; border-left: 3px solid var(--line-strong); color: var(--text-2); background: var(--surface-2); }
.doc code { font-family: var(--mono); font-size: 12.5px; background: var(--surface-2); padding: 0 4px; border-radius: 4px; }

.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); }
.tabs button { border: 0; background: transparent; padding: 8px 12px; cursor: pointer; border-bottom: 2px solid transparent; color: var(--text-2); }
.tabs button.on { color: var(--text); border-bottom-color: var(--accent); font-weight: 600; }

@media (max-width: 1100px) {
  .reader { grid-template-columns: 1fr; height: auto; }
  .reader .left { height: 62vh; border-right: 0; border-bottom: 1px solid var(--line); }
}

/* 쉬운 설명 · 튜토리얼 · 처음 안내 */
.help-btn { width: 20px; height: 20px; border-radius: 50%; border: 1px solid var(--line-strong); background: var(--surface);
  color: var(--text-2); font-size: 12px; font-weight: 700; line-height: 1; cursor: pointer; padding: 0; margin-left: 2px; }
.help-btn[aria-expanded="true"] { background: var(--accent); border-color: var(--accent); color: #fff; }
.explain { background: var(--accent-soft); border-radius: 6px; padding: 8px 10px; margin: 2px 0 6px; font-size: 12.5px; line-height: 1.6; }
.explain p { margin: 0 0 4px; }
.explain p:last-child { margin: 0; }
.explain .ne-note { color: var(--text-2); }
.tour-card { position: fixed; left: 16px; bottom: calc(16px + env(safe-area-inset-bottom, 0px)); z-index: 35; width: min(400px, calc(100vw - 32px));
  background: var(--surface); border: 1px solid var(--accent); border-radius: 12px; box-shadow: 0 12px 32px rgba(0,0,0,.18); padding: 12px 14px; }
.tour-head { display: flex; align-items: center; gap: 8px; }
.tour-step { font-size: 12px; color: var(--accent); }
.tour-body { margin-top: 8px; font-size: 13.5px; line-height: 1.6; display: flex; flex-direction: column; gap: 6px; }
.tour-body p { margin: 0; }
.tour-check { font-size: 12.5px; padding: 6px 8px; border-radius: 6px; background: var(--warn-soft); color: var(--warn); }
.tour-check.ok { background: var(--ok-soft); color: var(--ok); }
.tour-hl { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 8px; animation: tourpulse 1.6s ease-in-out infinite; }
@keyframes tourpulse { 0%, 100% { outline-color: var(--accent); } 50% { outline-color: rgba(31, 95, 191, .35); } }
@media (prefers-reduced-motion: reduce) { .tour-hl { animation: none; } }
.intro-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.intro-item { background: var(--surface-2); border-radius: 8px; padding: 12px 14px; }
.intro-item h3 { margin-bottom: 4px; }
.intro-item p { margin: 0; font-size: 13.5px; color: var(--text-2); line-height: 1.6; }
@media (max-width: 860px) { .intro-grid { grid-template-columns: minmax(0, 1fr); } }

.doc-fig { margin: 12px 0 16px; background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 10px; }
.doc-fig img { display: block; width: 100%; height: auto; }
.doc-fig figcaption { font-size: 12.5px; color: var(--text-2); margin-top: 6px; }

/* 튜토리얼 그림 */
.tour-card.has-fig { width: min(560px, calc(100vw - 32px)); }
.tour-fig { display: flex; flex-direction: column; gap: 4px; padding: 6px; border: 1px solid var(--line); border-radius: 8px;
  background: #fff; cursor: zoom-in; text-align: left; }
.tour-fig:hover { border-color: var(--accent); }
.tour-fig img { display: block; width: 100%; height: auto; max-height: min(170px, 28vh); object-fit: contain; }
.tour-fig-cap { display: flex; gap: 8px; align-items: baseline; font-size: 11.5px; color: #5b6168; line-height: 1.45; }
.tour-fig-zoom { margin-left: auto; white-space: nowrap; color: var(--accent); font-weight: 600; }
.modal.fig-modal { max-width: min(1100px, calc(100vw - 32px)); }
.fig-wrap { background: #fff; border-radius: 8px; overflow-x: auto; }
.fig-wrap img { display: block; width: 100%; min-width: 720px; height: auto; }
.tour-card { max-height: calc(100vh - 32px); overflow-y: auto; }

/* ---- 홈: 다음 할 일 · 연습 모음 ---- */
a.btn { text-decoration: none; }
.btn.lg { min-height: 44px; padding: 10px 20px; font-size: 15px; font-weight: 600; border-radius: 10px; }
.card.hero { border-color: #bcd0f2; box-shadow: 0 1px 0 rgba(31, 95, 191, .06); padding: 22px 24px; gap: 10px; }
.hero-title { font-size: 21px; }
.hero-text { margin: 0; font-size: 15px; color: var(--text); }
.steps { display: flex; gap: 10px; flex-wrap: wrap; }
.step { display: inline-flex; align-items: center; gap: 8px; padding: 4px 12px 4px 4px; border: 1px solid var(--line); border-radius: 999px; background: var(--surface-2); font-size: 13px; }
.step-n { display: inline-grid; place-items: center; width: 22px; height: 22px; border-radius: 50%; background: var(--line); font-size: 12px; font-weight: 700; }
.step.on { border-color: var(--accent); background: var(--accent-soft); }
.step.on .step-n { background: var(--accent); color: #fff; }
.step.done .step-n { background: var(--ok); color: #fff; }
table.grid td.right { text-align: right; }
table.grid tr.next td { background: var(--accent-soft); }
table.grid.compact td { padding: 6px 10px; vertical-align: middle; }
table.grid td { vertical-align: middle; }
details.fold { border-top: 1px solid var(--line); padding-top: 10px; }
details.fold > summary { cursor: pointer; font-weight: 600; list-style-position: inside; }
details.fold[open] > summary { margin-bottom: 6px; }

/* ---- 입력 패널: 평가 불가 접기 · 선택 항목 ---- */
.seg button.ne-toggle { font-size: 12px; }
.opt-fold > summary { font-size: 13px; color: var(--text-2); }
.opt-fold[open] > summary { margin-bottom: 10px; }
.opt-fold .field { margin-top: 10px; }
.nowrap { white-space: nowrap; }
.tour-more { font-size: 12px; color: var(--accent); text-decoration: none; }
.tour-more:hover { text-decoration: underline; }

/* ---- 할 일 안내 ---- */
.todo-bar { border-color: #f0c98a; background: #fffaf1; }
.todo-bar.done { border-color: #b9dfc5; background: var(--ok-soft); }
.todo-bar .todo-head { display: flex; align-items: center; gap: 8px; padding: 10px 12px 4px; }
.todo-bar .todo-head b { color: var(--warn); font-size: 14px; }
.todo-bar.done .todo-head b { color: var(--ok); }
.todo-bar .todo-next { padding: 0 12px 6px; color: var(--text); }
.todo-bar .todo-chips { display: flex; flex-wrap: wrap; gap: 6px; padding: 0 12px 10px; align-items: center; }
.todo-bar p { margin: 0; padding: 0 12px 10px; }
.todo-chip { border: 1px solid #f0c98a; background: #fff; color: var(--warn); border-radius: 999px; padding: 2px 10px; font-size: 12px; cursor: pointer; }
.todo-chip:hover { background: var(--warn-soft); }
.todo-chip.first { background: var(--warn); border-color: var(--warn); color: #fff; }
.todo-chip.soft { border-color: var(--line); color: var(--text-2); }
.field.todo { border-left: 3px solid #f0a33a; padding-left: 9px; margin-left: -12px; }
.field.todo > .flabel { color: var(--warn); }
.field.todo > .flabel::before { content: "●"; font-size: 9px; margin-right: 2px; }
.conflict.todo-soft { border-left: 3px solid var(--line-strong); padding-left: 8px; }
.section.todo-sec { border-color: #f0c98a; box-shadow: inset 3px 0 0 #f0a33a; }
.agree-fold > summary { font-size: 13px; color: var(--ok); }
.agree-fold[open] > summary { margin-bottom: 10px; }
.agree-fold .field { margin-top: 10px; }
.btn.primary.ready { box-shadow: 0 0 0 3px rgba(21,128,61,.35); background: var(--ok); border-color: var(--ok); }
@keyframes flashbg { 0%, 60% { background: #fde7c2; } 100% { background: transparent; } }
.flash { animation: flashbg 1.4s ease-out; border-radius: 6px; }