/* ==========================================================================
   투더제이 코딩 클래스 — 강의 가이드 웹 문서 스타일
   --------------------------------------------------------------------------
   정적 HTML 가이드 사이트 전용 (slide CSS와 별개로 새로 작성).
   theme.css 의 색/폰트 토큰을 그대로 차용하여 톤을 통일.
   ========================================================================== */

@import url("https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/static/pretendard.min.css");

/* --------------------------------------------------------------------------
   1. 디자인 토큰
   -------------------------------------------------------------------------- */
:root {
  --c-bg:            #F7F5F0;
  --c-bg-alt:        #FAF9F6;
  --c-surface:       #FFFFFF;

  --c-text:          #2A2E35;
  --c-text-soft:     #555B66;
  --c-text-faint:    #8A909B;

  --c-accent:        #6E8B73;
  --c-accent-strong: #5C7860;
  --c-accent-soft:   #E4EBE3;
  --c-accent-tint:   #F0F3EE;

  --c-warm:          #C68B59;
  --c-warm-soft:     #F2E5D6;

  --c-border:        #E3DFD6;
  --c-border-soft:   #ECE9E2;

  --font-sans: "Pretendard", "Pretendard Variable", -apple-system,
               BlinkMacSystemFont, "Apple SD Gothic Neo", "Noto Sans KR",
               system-ui, sans-serif;
  --font-mono: "SFMono-Regular", "JetBrains Mono", "D2Coding", Consolas,
               "Liberation Mono", Menlo, monospace;

  --radius:    14px;
  --radius-sm: 10px;
  --shadow:    0 6px 22px rgba(42, 46, 53, 0.06);
  --shadow-sm: 0 2px 8px  rgba(42, 46, 53, 0.05);

  --maxw: 800px;
}

/* --------------------------------------------------------------------------
   2. 베이스
   -------------------------------------------------------------------------- */
* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--c-bg);
  color: var(--c-text);
  font-size: 17px;
  line-height: 1.7;
  letter-spacing: -0.01em;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; }

a {
  color: var(--c-accent-strong);
  text-decoration: none;
}
a:hover { text-decoration: underline; }

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
}

/* --------------------------------------------------------------------------
   3. 상단 브랜드 바
   -------------------------------------------------------------------------- */
.site-header {
  border-bottom: 1px solid var(--c-border);
  background: var(--c-bg-alt);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  gap: 0.55em;
  padding-top: 18px;
  padding-bottom: 18px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  color: var(--c-text-soft);
}
.brand::before {
  content: "";
  width: 0.55em;
  height: 0.55em;
  border-radius: 50%;
  background: var(--c-accent);
  flex: 0 0 auto;
}
.brand b { color: var(--c-accent-strong); font-weight: 800; }

/* --------------------------------------------------------------------------
   4. 랜딩 히어로
   -------------------------------------------------------------------------- */
.hero {
  padding: 56px 0 12px;
  text-align: center;
}
.hero .kicker {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-accent-strong);
  background: var(--c-accent-soft);
  padding: 0.4em 1em;
  border-radius: 999px;
  margin-bottom: 0.9em;
}
.hero h1 {
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.025em;
  margin: 0 0 0.4em;
}
.hero p {
  color: var(--c-text-soft);
  font-size: 1.05rem;
  margin: 0;
}

/* --------------------------------------------------------------------------
   5. 강의 목차 리스트 (카드)
   -------------------------------------------------------------------------- */
.course-list {
  list-style: none;
  margin: 40px 0 8px;
  padding: 0;
  display: grid;
  gap: 14px;
}
.course-card {
  display: flex;
  align-items: center;
  gap: 18px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 18px 22px;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.course-card.active { border-left: 5px solid var(--c-accent); }
.course-card.active:hover {
  border-color: var(--c-accent);
  transform: translateY(-2px);
}
.course-card.soon {
  background: var(--c-bg-alt);
  border-style: dashed;
  opacity: 0.78;
}

.course-no {
  flex: 0 0 auto;
  width: 2.1em;
  height: 2.1em;
  border-radius: 50%;
  background: var(--c-accent);
  color: #fff;
  font-weight: 800;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  justify-content: center;
}
.course-card.soon .course-no {
  background: var(--c-border);
  color: var(--c-text-faint);
}

.course-body { flex: 1 1 auto; min-width: 0; }
.course-title {
  font-weight: 800;
  font-size: 1.08rem;
  margin: 0 0 0.15em;
  display: flex;
  align-items: center;
  gap: 0.5em;
  flex-wrap: wrap;
}
.course-desc {
  color: var(--c-text-soft);
  font-size: 0.92rem;
  margin: 0;
}

.course-action { flex: 0 0 auto; }
.btn {
  display: inline-block;
  font-weight: 700;
  font-size: 0.9rem;
  padding: 0.55em 1.1em;
  border-radius: 999px;
  background: var(--c-accent);
  color: #fff;
  white-space: nowrap;
}
.btn:hover { background: var(--c-accent-strong); text-decoration: none; }

/* --------------------------------------------------------------------------
   6. 배지
   -------------------------------------------------------------------------- */
.badge {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 700;
  padding: 0.25em 0.7em;
  border-radius: 999px;
  background: var(--c-accent-soft);
  color: var(--c-accent-strong);
  letter-spacing: 0.02em;
  vertical-align: middle;
}
.badge.soon { background: var(--c-border-soft); color: var(--c-text-faint); }
.badge.warm { background: var(--c-warm-soft); color: var(--c-warm); }

/* --------------------------------------------------------------------------
   7. 가이드 문서 본문
   -------------------------------------------------------------------------- */
.doc { padding: 8px 0 24px; }

.backlink {
  display: inline-block;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--c-text-soft);
  margin: 28px 0 6px;
}
.backlink:hover { color: var(--c-accent-strong); }

.doc-head { padding: 8px 0 6px; }
.doc-head .kicker {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-accent-strong);
  background: var(--c-accent-soft);
  padding: 0.4em 1em;
  border-radius: 999px;
  margin-bottom: 0.7em;
}
.doc-head h1 {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -0.025em;
  margin: 0 0 0.35em;
}
.doc-head .lede {
  color: var(--c-text-soft);
  font-size: 1.05rem;
  margin: 0;
}

.doc h2 {
  font-size: 1.45rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 2.2em 0 0.6em;
  padding-top: 0.3em;
  scroll-margin-top: 20px;
}
.doc h2 .h-no {
  color: var(--c-accent);
  margin-right: 0.35em;
}
.doc h3 {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--c-accent-strong);
  margin: 1.6em 0 0.45em;
}
.doc p { margin: 0 0 1em; }

.doc ul, .doc ol { margin: 0.4em 0 1.1em; padding-left: 0; }
.doc ul { list-style: none; }
.doc ul > li {
  position: relative;
  padding-left: 1.3em;
  margin: 0.4em 0;
}
.doc ul > li::before {
  content: "";
  position: absolute;
  left: 0.1em;
  top: 0.72em;
  width: 0.4em;
  height: 0.4em;
  border-radius: 50%;
  background: var(--c-accent);
}
.doc ol { list-style: decimal; padding-left: 1.4em; }
.doc ol > li { margin: 0.4em 0; padding-left: 0.2em; }
.doc ol > li::marker { color: var(--c-accent-strong); font-weight: 800; }

.doc strong { color: var(--c-accent-strong); font-weight: 800; }
.doc em { color: var(--c-warm); font-style: normal; font-weight: 700; }

/* 구분선 */
.doc hr {
  border: none;
  border-top: 1px solid var(--c-border);
  margin: 2.4em 0;
}

/* --------------------------------------------------------------------------
   8. 목차(TOC)
   -------------------------------------------------------------------------- */
.toc {
  background: var(--c-accent-tint);
  border: 1px solid var(--c-accent-soft);
  border-radius: var(--radius);
  padding: 18px 24px;
  margin: 28px 0 8px;
}
.toc-title {
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-accent-strong);
  margin-bottom: 0.6em;
}
.toc ol {
  list-style: none;
  margin: 0;
  padding: 0;
  columns: 2;
  column-gap: 28px;
}
.toc ol > li {
  margin: 0.3em 0;
  break-inside: avoid;
}
.toc ol > li::before { content: none; }
.toc a {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--c-text-soft);
}
.toc a:hover { color: var(--c-accent-strong); }

/* --------------------------------------------------------------------------
   9. 표
   -------------------------------------------------------------------------- */
.table-scroll { overflow-x: auto; margin: 0.4em 0 1.3em; }
table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  background: var(--c-surface);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--c-border);
  font-size: 0.92rem;
}
thead th {
  background: var(--c-accent);
  color: #fff;
  font-weight: 800;
  text-align: left;
  padding: 0.65em 1em;
}
thead th:first-child { background: var(--c-accent-strong); }
td, th {
  padding: 0.6em 1em;
  border-bottom: 1px solid var(--c-border-soft);
  vertical-align: top;
}
tbody tr:nth-child(even) td { background: var(--c-accent-tint); }
tbody tr:last-child td { border-bottom: none; }
tbody td:first-child { font-weight: 700; color: var(--c-text); }
table.center-cells td:not(:first-child),
table.center-cells th:not(:first-child) { text-align: center; }

/* --------------------------------------------------------------------------
   10. 코드블록 / 다이어그램
   -------------------------------------------------------------------------- */
pre {
  margin: 0.4em 0 1.3em;
  background: var(--c-bg-alt);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  overflow: auto;
  box-shadow: var(--shadow-sm);
}
pre code {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--c-text);
  white-space: pre;
}
code.inline {
  font-family: var(--font-mono);
  font-size: 0.86em;
  background: var(--c-accent-soft);
  color: var(--c-accent-strong);
  padding: 0.12em 0.42em;
  border-radius: 6px;
}

.diagram {
  font-family: var(--font-mono);
  background: var(--c-bg-alt);
  border: 1px dashed var(--c-accent);
  border-radius: var(--radius);
  padding: 16px 18px;
  line-height: 1.5;
  white-space: pre;
  overflow: auto;
  color: var(--c-text);
  font-size: 0.8rem;
  box-shadow: var(--shadow-sm);
  margin: 0.4em 0 1.3em;
}

/* 좌우 코드 비교 */
.compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 0.4em 0 1.3em;
}
.compare .pane { min-width: 0; }
.compare .pane-label {
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  margin-bottom: 0.45em;
  color: var(--c-text-soft);
}
.compare .pane.ssr .pane-label { color: var(--c-accent-strong); }
.compare .pane.csr .pane-label { color: var(--c-warm); }
.compare pre { margin: 0; }

/* --------------------------------------------------------------------------
   11. 카드 / 인용 / 팁 박스
   -------------------------------------------------------------------------- */
.cols2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 0.4em 0 1.3em;
}
.card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 18px 22px;
  box-shadow: var(--shadow-sm);
}
.card > :last-child { margin-bottom: 0; }
.card .card-title {
  font-weight: 800;
  font-size: 1.02rem;
  margin: 0 0 0.5em;
}
.card.accent { background: var(--c-accent-tint); border-color: var(--c-accent-soft); }
.card.accent .card-title { color: var(--c-accent-strong); }
.card.warm { background: var(--c-warm-soft); border-color: var(--c-warm); }
.card.warm .card-title { color: var(--c-warm); }

/* pro/con 마커 */
.list-pro, .list-con { list-style: none; padding-left: 0 !important; }
.list-pro > li, .list-con > li { padding-left: 1.6em; }
.list-pro > li::before {
  content: "✔"; background: none; width: auto; height: auto;
  top: 0; left: 0; color: var(--c-accent); font-weight: 800;
}
.list-con > li::before {
  content: "⚠"; background: none; width: auto; height: auto;
  top: 0; left: 0; color: var(--c-warm); font-weight: 800;
}

.quote {
  background: var(--c-accent-tint);
  border-left: 5px solid var(--c-accent);
  border-radius: var(--radius-sm);
  padding: 16px 22px;
  margin: 0.4em 0 1.3em;
  color: var(--c-text);
}
.quote .q-label {
  display: block;
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-accent-strong);
  margin-bottom: 0.4em;
}
.quote.warm { background: var(--c-warm-soft); border-left-color: var(--c-warm); }
.quote.warm .q-label { color: var(--c-warm); }
.quote p:last-child { margin-bottom: 0; }

.tip {
  background: var(--c-warm-soft);
  border: 1px solid var(--c-warm);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  margin: 0.4em 0 1.3em;
  display: flex;
  gap: 0.7em;
  align-items: flex-start;
}
.tip .tip-ico { font-size: 1.2em; line-height: 1.5; flex: 0 0 auto; }
.tip p:last-child { margin-bottom: 0; }
.tip .tip-body { font-size: 0.95rem; }

/* 단계 박스 */
.steps { display: flex; flex-direction: column; gap: 12px; margin: 0.4em 0 1.3em; }
.step {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  box-shadow: var(--shadow-sm);
}
.step .num {
  flex: 0 0 auto;
  width: 1.8em;
  height: 1.8em;
  border-radius: 50%;
  background: var(--c-accent);
  color: #fff;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
}
.step .step-body { line-height: 1.6; }
.step .step-body strong { color: var(--c-accent-strong); }

/* --------------------------------------------------------------------------
   12. 푸터
   -------------------------------------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--c-border);
  margin-top: 48px;
  padding: 26px 0;
  text-align: center;
}
.site-footer small {
  color: var(--c-text-faint);
  font-size: 0.82rem;
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   13. 반응형
   -------------------------------------------------------------------------- */
@media (max-width: 680px) {
  body { font-size: 16px; }
  .hero h1 { font-size: 1.7rem; }
  .doc-head h1 { font-size: 1.6rem; }
  .doc h2 { font-size: 1.25rem; }
  .compare, .cols2 { grid-template-columns: 1fr; }
  .toc ol { columns: 1; }
  .course-card { flex-wrap: wrap; }
  .course-action { width: 100%; }
  .course-action .btn { display: block; text-align: center; }
}