/* ============================================================
   웹디자인 실전 42일 — 공통 디자인 시스템
   ============================================================ */

:root {
  /* color */
  --color-primary: #0B7A6E;
  --color-primary-dark: #085E55;
  --color-primary-mid: #348F84;
  --color-primary-bg: #ECF5F3;
  --color-chip-bg: #D9EEE6;
  --color-chip-text: #0A6E62;

  --color-page-bg: #F6F7F4;
  --color-surface: #FFFFFF;
  --color-border: #E3E7E2;

  --color-heading: #1F2933;
  --color-body: #3D4852;
  --color-muted: #66707C;

  --color-code-bg: #16232E;
  --color-code-text: #DCE5EC;
  --color-code-selector: #FFA69E;
  --color-code-property: #6FD3C2;
  --color-code-comment: #6E8296;

  --color-warn-bg: #FBF3E4;
  --color-warn-border: #EAD59E;
  --color-warn-text: #6B5310;
  --color-warn-strong: #574208;

  --color-danger: #B0554A;
  --color-danger-bg: #C2554A;
  --color-danger-tint-bg: #F7E3DF;

  /* type */
  --font-sans: 'Pretendard Variable', Pretendard, -apple-system, BlinkMacSystemFont,
    'Apple SD Gothic Neo', 'Malgun Gothic', sans-serif;
  --font-mono: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;

  --fs-h1: 34px;
  --fs-h2: 23px;
  --fs-label: 14px;
  --fs-body-lg: 17px;
  --fs-body: 15.5px;
  --fs-caption: 13.5px;
  --fs-caption-sm: 12.5px;
  --fs-code: 13.5px;
  --fs-code-sm: 12.5px;
  --fs-chip: 13.5px;

  --line-body: 1.75;
  --line-code: 1.9;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 12px;
  --radius-xl: 14px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--color-page-bg);
  font-family: var(--font-sans);
  color: var(--color-body);
  line-height: var(--line-body);
  word-break: keep-all;
}

.page-wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 56px 24px 80px;
}

/* ---------- header ---------- */
.article-header { margin-bottom: 56px; }

.article-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.article-meta .week-tag {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--color-primary);
}

.article-meta .day-tag {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-muted);
  font-variant-numeric: tabular-nums;
}

.progress-track {
  height: 3px;
  background: var(--color-border);
  border-radius: 2px;
  margin-bottom: 36px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--color-primary);
  border-radius: 2px;
}

.article-header h1 {
  margin: 0 0 14px;
  font-size: var(--fs-h1);
  line-height: 1.3;
  font-weight: 800;
  color: var(--color-heading);
  text-wrap: balance;
}

.article-header .subtitle {
  margin: 0;
  font-size: var(--fs-body-lg);
  color: var(--color-muted);
}

/* ---------- 10초 요약 / 콜아웃 ---------- */
.callout {
  background: var(--color-primary-bg);
  border-radius: var(--radius-lg);
  padding: 26px 28px;
  margin-bottom: 64px;
}

.callout h3 {
  margin: 0 0 12px;
  color: var(--color-primary-dark);
  font-size: var(--fs-label);
  font-weight: 800;
  letter-spacing: 1.5px;
  text-transform: uppercase;
}

.callout ul {
  margin: 0;
  padding-left: 18px;
  font-size: var(--fs-body);
  color: var(--color-body);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* pull-quote형 콜아웃 (본문 중간에 쓰는 핵심 한 줄) */
.pull-quote {
  background: var(--color-primary-bg);
  border-radius: var(--radius-lg);
  padding: 18px 22px;
  font-size: 17.5px;
  font-weight: 700;
  color: var(--color-primary-dark);
  line-height: 1.6;
  margin: 0 0 28px;
}

/* ---------- section ---------- */
.section { margin-bottom: 72px; }

.section-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 20px;
}

.section-head .num {
  font-size: 15px;
  font-weight: 800;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
}

.section-head h2 {
  margin: 0;
  font-size: var(--fs-h2);
  font-weight: 800;
  color: var(--color-heading);
}

.section p { margin: 0 0 18px; font-size: var(--fs-body); }
.section p:last-child { margin-bottom: 0; }

/* ---------- 인라인 코드 칩 ---------- */
code.chip {
  background: var(--color-chip-bg);
  color: var(--color-chip-text);
  font-weight: 600;
  border-radius: 4px;
  padding: 1px 6px;
  font-size: var(--fs-chip);
  font-family: var(--font-mono);
}

/* ---------- 코드 블록 ---------- */
.code-block {
  background: var(--color-code-bg);
  color: var(--color-code-text);
  padding: 20px 22px;
  border-radius: var(--radius-lg);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: var(--fs-code);
  line-height: var(--line-code);
  margin: 0 0 28px;
}

.code-block.small {
  padding: 14px 18px;
  font-size: var(--fs-code-sm);
  line-height: 1.8;
  border-radius: var(--radius-md);
  margin: 14px 0 0;
}

.code-block .sel { color: var(--color-code-selector); }
.code-block .prop { color: var(--color-code-property); }
.code-block .cmt { color: var(--color-code-comment); }

/* ---------- 라이브 데모 ---------- */
.demo-caption {
  font-size: var(--fs-caption);
  color: var(--color-muted);
  font-weight: 700;
  margin-bottom: 10px;
}

.demo-hint {
  font-size: var(--fs-caption);
  color: var(--color-muted);
  margin: 0 0 12px;
}

.demo-hint b { color: var(--color-heading); }

.demo-box {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 16px;
  border-radius: var(--radius-md);
  transition: all 0.2s;
  margin-bottom: 24px;
}

.demo-cell {
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-sm);
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
}

.demo-buttons {
  display: flex;
  gap: 8px;
  margin-top: 14px;
  flex-wrap: wrap;
}

.demo-btn {
  padding: 10px 18px;
  min-height: 40px;
  border-radius: 8px;
  border: 1px solid #CFE3DF;
  background: var(--color-surface);
  color: var(--color-primary);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  font-family: inherit;
}

.demo-btn.active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

/* 좁은 화면 깨짐 시뮬레이션 */
.narrow-frame {
  width: 260px;
  border: 2px solid #D5DAD4;
  border-radius: var(--radius-xl);
  padding: 12px;
  background: var(--color-surface);
  margin: 0 auto;
}

.narrow-frame .demo-cell.broken {
  background: var(--color-danger-bg);
  height: auto;
  padding: 6px 2px;
  font-size: 12px;
  text-align: center;
  overflow: hidden;
}

.result-caption {
  text-align: center;
  font-size: var(--fs-caption-sm);
  margin: 10px 0 0;
}

.result-caption.bad { color: var(--color-danger); }
.result-caption.good { color: var(--color-primary); }

/* ---------- 비교 카드 (auto-fill / minmax 등) ---------- */
.compare-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.compare-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 20px 22px;
  border-radius: var(--radius-lg);
}

.compare-card h4 {
  margin: 0 0 8px;
  color: var(--color-primary);
  font-size: 15px;
  font-family: var(--font-mono);
}

.compare-card p { margin: 0; font-size: 14.5px; color: var(--color-muted); }

/* ---------- 경고 / 팁 박스 ---------- */
.warn-box {
  background: var(--color-warn-bg);
  border: 1px solid var(--color-warn-border);
  padding: 16px 20px;
  border-radius: var(--radius-lg);
  font-size: 14.5px;
  color: var(--color-warn-text);
  margin-bottom: 24px;
}

.warn-box b.label { color: var(--color-warn-strong); }
.warn-box b.block-label { color: var(--color-warn-strong); display: block; margin-bottom: 6px; }

.warn-box code.chip {
  background: #F3E7C6;
  color: var(--color-warn-strong);
  padding: 1px 5px;
}

/* ---------- 실습 스텝 ---------- */
.step-list { display: flex; flex-direction: column; gap: 14px; margin-bottom: 24px; }

.step-item { display: flex; align-items: flex-start; gap: 12px; }

.step-num {
  background: var(--color-primary);
  color: #fff;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 2px;
}

.step-text { font-size: var(--fs-body); }

/* ---------- 체크리스트 ---------- */
.checklist { display: flex; flex-direction: column; gap: 10px; margin-bottom: 24px; }

.check-item {
  background: var(--color-surface);
  padding: 16px 18px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: flex-start;
  gap: 14px;
  border: 1px solid var(--color-border);
  cursor: pointer;
  user-select: none;
  transition: all 0.15s;
}

.check-item.checked {
  background: var(--color-primary-bg);
  border-color: #CFE3DF;
}

.check-box {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  border: 2px solid #C4CCC9;
  background: transparent;
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 800;
  flex-shrink: 0;
  margin-top: 2px;
}

.check-item.checked .check-box {
  border-color: var(--color-primary);
  background: var(--color-primary);
}

.check-label { font-size: 15px; color: var(--color-body); }

/* ---------- 오늘의 용어 ---------- */
.terms-section {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 26px 28px;
  margin-bottom: 56px;
}

.terms-section h3 {
  margin: 0 0 16px;
  color: var(--color-primary-dark);
  font-size: var(--fs-label);
  font-weight: 800;
  letter-spacing: 1.5px;
  text-transform: uppercase;
}

.terms-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
}

.term-card {
  background: var(--color-page-bg);
  border-radius: var(--radius-md);
  padding: 14px 16px;
}

/* 본문에 매칭되는 chip/굵은 글씨가 없는 용어의 안전장치 폴백 —
   script.js의 initGlossary()가 이 클래스를 자동으로 붙인다 (수동 지정 금지). */
.term-card--clickable {
  cursor: pointer;
  transition: background 0.15s, box-shadow 0.15s;
}
.term-card--clickable:hover {
  background: var(--color-primary-bg);
  box-shadow: inset 0 0 0 1px var(--color-primary);
}

.term-card .term-name {
  font-weight: 700;
  color: var(--color-heading);
  font-size: 14px;
  font-family: var(--font-mono);
}

.term-card .term-desc {
  font-size: var(--fs-caption-sm);
  color: var(--color-muted);
  margin-top: 4px;
  line-height: 1.6;
}

/* ---------- footer ---------- */
.site-footer {
  text-align: center;
  padding: 36px 24px;
  border-top: 1px solid var(--color-border);
}

.site-footer p { margin: 0 0 18px; color: var(--color-muted); font-size: 14.5px; }

.next-link {
  text-decoration: none;
  display: inline-block;
}

.next-link span {
  display: inline-block;
  padding: 13px 28px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 999px;
  font-weight: 700;
  font-size: 15px;
  transition: background 0.15s;
}

.next-link:hover span { background: var(--color-primary-dark); }

/* ---------- 팁 박스 (경고 아님, 참고 정보) ---------- */
.tip-box {
  background: var(--color-primary-bg);
  padding: 16px 20px;
  border-radius: var(--radius-lg);
  font-size: 14.5px;
  color: var(--color-primary-dark);
  margin-bottom: 24px;
}

.tip-box code.chip { background: var(--color-chip-bg); color: var(--color-chip-text); }

/* ---------- 개념 설명 박스 (다크, 코드 읽는 법 등) ---------- */
.concept-box {
  background: var(--color-code-bg);
  border-radius: var(--radius-lg);
  padding: 20px 22px;
  margin-bottom: 32px;
}

.concept-box h3 {
  margin: 0 0 12px;
  color: #9ad4c9;
  font-size: 15px;
  font-weight: 700;
}

.concept-box .snippet {
  background: rgba(0,0,0,0.25);
  color: var(--color-code-text);
  padding: 14px;
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 14px;
  margin: 12px 0;
}

.concept-box .notes {
  font-size: 13.5px;
  color: #b9c4cd;
  line-height: 1.9;
}

/* ---------- 데이터 테이블 ---------- */
.data-table-wrap { overflow-x: auto; }

.data-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  min-width: 480px;
  font-size: 14px;
  margin-bottom: 24px;
}

.data-table th {
  background: var(--color-primary);
  color: #fff;
  padding: 14px 16px;
  text-align: left;
  font-weight: 700;
}

.data-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-body);
}

.data-table tr:last-child td { border-bottom: none; }

/* ---------- 마일스톤 박스 (주차 완주 등) ---------- */
.milestone-box {
  border: 2px dashed var(--color-primary-mid);
  padding: 28px 24px;
  border-radius: var(--radius-xl);
  text-align: center;
  margin: 32px 0;
}

.milestone-box .milestone-title {
  margin: 0 0 16px;
  font-weight: 800;
  font-size: 18px;
  color: var(--color-primary-dark);
}

.milestone-box ul {
  margin: 0 0 24px;
  padding-left: 0;
  list-style: none;
  color: var(--color-body);
  text-align: left;
  display: inline-block;
}

.milestone-box li { margin-bottom: 10px; font-size: 14.5px; }

.milestone-box .li-num {
  display: inline-block;
  width: 22px;
  height: 22px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 50%;
  text-align: center;
  line-height: 22px;
  font-size: 12px;
  margin-right: 8px;
  vertical-align: middle;
}

/* ---------- 허브/인덱스 페이지 ---------- */
.tier-card, .day-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px 22px;
  text-decoration: none;
  display: block;
  transition: all 0.15s;
}

.tier-card:hover, .day-card:hover { border-color: var(--color-primary-mid); }

.tier-card h3, .day-card h4 {
  margin: 0 0 6px;
  color: var(--color-heading);
  font-size: 16px;
  font-weight: 800;
}

.tier-card p, .day-card p {
  margin: 0;
  font-size: 13.5px;
  color: var(--color-muted);
}

.tier-card.disabled, .day-card.disabled {
  cursor: default;
  opacity: 0.55;
}

.tier-card.disabled:hover, .day-card.disabled:hover { border-color: var(--color-border); }

.tag-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.5px;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--color-primary-bg);
  color: var(--color-primary-dark);
  margin-bottom: 8px;
}

.tag-badge.muted { background: var(--color-page-bg); color: var(--color-muted); }

/* ---------- hover 데모 (Day 16): 버튼이 아니라 실제 마우스 hover로 동작 ---------- */
.hover-demo-card {
  transition: transform 0.2s, box-shadow 0.2s;
}

.hover-demo-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.08);
}

/* ---------- 모바일 nav 데모 (Day 18) ---------- */
.mobile-nav-demo {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.25s;
}

.mobile-nav-demo.open { max-height: 300px; }

/* ---------- 용어 사이드바 (본문 code.chip 클릭 → 오늘의 용어 설명 표시) ---------- */
code.chip.chip-linked {
  cursor: pointer;
  border-bottom: 2px dotted var(--color-primary-mid);
}

code.chip.chip-linked:hover {
  background: var(--color-primary-mid);
  color: #fff;
}

/* code.chip이 아니라 <b>/<strong> 굵은 글씨로만 용어가 등장한 경우(예: DOM, BEM, 컴포넌트) */
b.term-linked, strong.term-linked {
  cursor: pointer;
  border-bottom: 2px dotted var(--color-primary-mid);
}

b.term-linked:hover, strong.term-linked:hover {
  color: var(--color-primary-dark);
}

.glossary-panel {
  position: fixed;
  top: 50%;
  right: 24px;
  width: 320px;
  max-width: calc(100vw - 48px);
  max-height: calc(100vh - 120px);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: 0 14px 36px rgba(0,0,0,0.16);
  z-index: 1000;
  opacity: 0;
  transform: translateY(-50%) scale(0.96);
  pointer-events: none;
  transition: opacity 0.18s ease, transform 0.18s ease;
  display: flex;
  flex-direction: column;
  font-family: var(--font-sans);
}

.glossary-panel.open {
  opacity: 1;
  transform: translateY(-50%) scale(1);
  pointer-events: auto;
}

.glossary-panel__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 18px;
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.glossary-panel__head span {
  font-size: var(--fs-label);
  font-weight: 800;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--color-primary-dark);
}

.glossary-panel__close {
  background: none;
  border: none;
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  color: var(--color-muted);
  padding: 0;
}

.glossary-panel__close:hover { color: var(--color-heading); }

.glossary-panel__body {
  padding: 18px;
  overflow-y: auto;
  flex: 1;
}

.glossary-panel__body h4 {
  margin: 0 0 8px;
  color: var(--color-primary-dark);
  font-size: 16px;
  font-family: var(--font-mono);
}

.glossary-panel__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-body);
}

.glossary-panel__empty { color: var(--color-muted) !important; font-size: 13.5px !important; }

@media (max-width: 640px) {
  .glossary-panel {
    left: 16px;
    right: 16px;
    width: auto;
    max-width: none;
  }
}

/* ---------- 반응형 ---------- */
@media (max-width: 480px) {
  .page-wrap { padding: 40px 18px 60px; }
  .article-header h1 { font-size: 28px; }
}