/* =========================================================
   공통 디자인 시스템 — SELECTWAY 실습 교안 시리즈
   (260831 교안의 디자인 시스템을 전체 규칙으로 통일)
   ========================================================= */
:root{
  --bg:#f7f8fa;
  --surface:#FFFFFF;
  --surface-2:#f3f5f7;
  --ink:#171a1f;
  --ink-muted:#69717c;
  --muted:#69717c;
  --line:#e3e6ea;
  --accent:#3056d3;
  --accent-soft:#eef2ff;
  --accent-ink:#2444aa;
  --green:#147d64;
  --green-soft:#eaf7f2;
  --orange:#a75a22;
  --orange-soft:#fff1e7;
  --red:#a13b3b;
  --red-soft:#fff0f0;
  --notice-bg:var(--orange-soft);
  --notice-line:#f3d7c3;
  --notice-ink:var(--orange);
  --code-bg:#15191f;
  --code-ink:#eef1f4;
  --shadow: 0 8px 24px rgba(27,33,44,.06);
  --radius: 12px;
  --sidebar-w: 260px;
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"Noto Sans KR","Pretendard","Malgun Gothic",-apple-system,BlinkMacSystemFont,sans-serif;
  font-size:16px;
  line-height:1.72;
  word-break:keep-all;
  overflow-wrap:break-word;
  -webkit-font-smoothing:antialiased;
}
code, pre, .mono{ font-family:"JetBrains Mono",ui-monospace,Consolas,monospace; }
a{ color:var(--accent); text-decoration:none; text-underline-offset:2px; }
a:hover{ color:var(--accent-ink); text-decoration:underline; }
h1,h2,h3,h4{ font-weight:800; line-height:1.35; color:var(--ink); }
p{ margin:0 0 1rem; }
ul,ol{ padding-left:1.35rem; }
li{ margin-bottom:.4rem; }

/* ---------- 페이지 레이아웃 (사이드바 + 본문) ---------- */
.page{
  display:flex;
  align-items:flex-start;
  max-width:1180px;
  margin:0 auto;
}
.sidebar{
  position:sticky;
  top:0;
  align-self:flex-start;
  width:var(--sidebar-w);
  flex:none;
  height:100vh;
  overflow-y:auto;
  padding:28px 20px 40px;
  border-right:1px solid var(--line);
  background:var(--surface);
}
.sidebar .home-link{
  display:inline-block;
  font-size:13px;
  font-weight:700;
  color:var(--accent-ink);
  text-decoration:none;
  margin-bottom:18px;
}
.sidebar .home-link:hover{ color:var(--accent); text-decoration:underline; }
.sidebar .doc-title{
  font-size:14.5px;
  font-weight:800;
  color:var(--ink);
  margin-bottom:18px;
  line-height:1.5;
}
.sidebar .toc-label{
  font-size:11px;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--ink-muted);
  font-weight:700;
  margin-bottom:10px;
}
.sidebar nav ol, .sidebar nav ul{
  list-style:none;
  margin:0;
  padding:0;
}
.sidebar nav ol ol, .sidebar nav ul ul{
  padding-left:14px;
  margin-top:4px;
}
.sidebar nav a{
  display:block;
  padding:6px 8px;
  border-radius:7px;
  font-size:13.5px;
  color:var(--ink);
  text-decoration:none;
  line-height:1.5;
}
.sidebar nav a:hover{ background:var(--accent-soft); color:var(--accent-ink); }
.sidebar nav > ol > li > a{ font-weight:700; }
.sidebar nav ol ol a{ font-size:12.8px; color:var(--ink-muted); font-weight:400; }
.sidebar nav ol ol a:hover{ color:var(--accent-ink); }
.sidebar nav a.active{ background:var(--accent-soft); color:var(--accent-ink); font-weight:700; box-shadow:inset 2px 0 0 var(--accent); }
.sidebar nav ol ol a.active{ font-weight:700; }
.sidebar nav a.active-parent{ color:var(--accent-ink); }

.sidebar-toggle-input{ display:none; }
.sidebar-toggle-btn{
  display:none;
  position:fixed;
  top:14px; left:14px;
  z-index:40;
  background:var(--ink);
  color:#fff;
  border-radius:8px;
  padding:8px 12px;
  font-size:13px;
  font-weight:700;
  cursor:pointer;
  box-shadow:var(--shadow);
}

.content{
  flex:1;
  min-width:0;
  padding:56px 40px 96px;
  max-width:820px;
}

@media (max-width:900px){
  .sidebar-toggle-btn{ display:inline-block; }
  .sidebar{
    position:fixed;
    z-index:39;
    left:0; top:0;
    height:100vh;
    transform:translateX(-102%);
    transition:transform .2s ease;
    box-shadow:var(--shadow);
  }
  .sidebar-toggle-input:checked ~ .sidebar{ transform:translateX(0); }
  .content{ padding:80px 20px 80px; }
}

/* ---------- 표지 ---------- */
.doc-header{
  border-bottom:1px solid var(--line);
  padding-bottom:24px;
  margin-bottom:36px;
}
.doc-header .date{
  font-family:"JetBrains Mono",monospace;
  font-size:12.5px;
  font-weight:700;
  letter-spacing:.05em;
  color:var(--accent);
  margin-bottom:8px;
}
.doc-header h1{
  font-size:clamp(22px,3.4vw,34px);
  letter-spacing:-.03em;
  margin:8px 0 12px;
}
.doc-header .lede{
  color:#4b535e;
  font-size:16.5px;
  max-width:62ch;
}

/* ---------- 섹션 리듬 ---------- */
section{ padding-top:44px; }
section:first-of-type{ padding-top:0; }
h1.section-title{
  font-size:clamp(20px,2.8vw,26px);
  letter-spacing:-.02em;
  border-top:1px solid var(--line);
  padding-top:32px;
  margin-top:0;
}
section:first-of-type h1.section-title{ border-top:none; padding-top:0; }
h2.sub-title{ font-size:18px; margin-top:28px; letter-spacing:-.01em; }
h3{ font-size:15.5px; margin-top:20px; }
h4{ font-size:14.5px; margin-top:16px; color:var(--ink-muted); }

/* ---------- 그리드 / 비교 레이아웃 ---------- */
.grid2,.grid3,.grid4{ display:grid; gap:14px; margin:18px 0; }
.grid2{ grid-template-columns:repeat(2,1fr); }
.grid3{ grid-template-columns:repeat(3,1fr); }
.grid4{ grid-template-columns:repeat(4,1fr); }
@media(max-width:760px){ .grid3,.grid4{ grid-template-columns:1fr 1fr; } }
@media(max-width:520px){ .grid2,.grid3,.grid4{ grid-template-columns:1fr; } }
.compare{ display:grid; grid-template-columns:1fr 1fr; gap:14px; margin:18px 0; }
.compare .before{ border-top:3px solid #8a929c; }
.compare .after{ border-top:3px solid var(--accent); }
@media(max-width:520px){ .compare{ grid-template-columns:1fr; } }

/* ---------- 카드 / 박스 공통 ---------- */
.card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:18px;
  box-shadow:var(--shadow);
}
.card h3{ font-size:15px; margin:0 0 7px; }
.card p{ font-size:13.5px; color:var(--ink-muted); margin:0; }
.card strong{ color:var(--ink); }
.step-num{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:1.5rem; height:1.5rem;
  border-radius:50%;
  background:var(--ink);
  color:#fff;
  font-size:.8rem;
  font-family:"JetBrains Mono",monospace;
  margin-right:.45rem;
}

/* ---------- 안내 / 주의 박스 (이모지 없이 라벨로 표시) ---------- */
.note,.tip,.notice,.story{
  border-radius:var(--radius);
  padding:14px 16px;
  margin:18px 0;
  font-size:13.5px;
}
.note{ background:var(--accent-soft); border:1px solid #d8e0ff; }
.tip{ background:var(--green-soft); border:1px solid #caeadf; }
.notice{ background:var(--orange-soft); border:1px solid var(--notice-line); }
.story{ background:#faf7f0; border:1px solid #e9dcc0; }
.note .label,.tip .label,.notice .label,.story .label{
  display:inline-block;
  font:700 10px "JetBrains Mono",monospace;
  letter-spacing:.05em;
  text-transform:uppercase;
  margin-right:8px;
}
.note .label{ color:var(--accent); }
.tip .label{ color:var(--green); }
.notice .label{ color:var(--orange); }
.story .label{ color:#96731c; }

/* ---------- 프롬프트 / 명령어 박스 (항상 복사 가능) ---------- */
.prompt-tier{
  font-family:"JetBrains Mono",monospace;
  font-size:11px;
  letter-spacing:.06em;
  text-transform:uppercase;
  font-weight:700;
  color:var(--ink-muted);
  margin:14px 0 6px;
}
.prompt-tier.advanced{ color:var(--accent-ink); }
.prompt-wrap{ position:relative; margin:8px 0 16px; }
.prompt-box{
  background:var(--code-bg);
  color:var(--code-ink);
  border-radius:10px;
  padding:17px 56px 17px 18px;
  font-family:"JetBrains Mono",monospace;
  font-size:12.5px;
  line-height:1.7;
  white-space:pre-wrap;
  overflow:auto;
}
.copy-btn{
  position:absolute;
  top:9px; right:9px;
  background:#252a31;
  color:#fff;
  border:1px solid #444b55;
  border-radius:7px;
  padding:6px 9px;
  font-size:11px;
  cursor:pointer;
}
.copy-btn:hover{ background:#343a43; }

/* ---------- 표 ---------- */
.tablewrap{ overflow-x:auto; margin:18px 0; border-radius:var(--radius); border:1px solid var(--line); }
table{ border-collapse:collapse; width:100%; min-width:560px; background:var(--surface); font-size:13.5px; }
th, td{ text-align:left; padding:12px 14px; border-bottom:1px solid var(--line); vertical-align:top; }
thead th, tr:first-child th{ background:var(--surface-2); color:var(--ink); font-weight:700; font-size:13px; }
tbody tr:last-child td{ border-bottom:none; }

/* ---------- 접이식 상세 ---------- */
details{
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:14px 18px;
  margin:16px 0;
  background:var(--surface);
}
details summary{
  cursor:pointer;
  font-weight:700;
  font-size:14.5px;
  list-style:none;
}
details summary::-webkit-details-marker{ display:none; }
details summary::before{
  content:"▸ ";
  color:var(--accent);
}
details[open] summary::before{ content:"▾ "; }

/* ---------- 출처 / 근거 (작게, 섹션 하단) ---------- */
.cite{
  margin-top:18px;
  padding-top:10px;
  border-top:1px dashed var(--line);
  font-size:12px;
  color:var(--ink-muted);
  line-height:1.6;
}
.cite .cite-label{ font-weight:700; color:var(--ink-muted); }
.cite a{ color:var(--ink-muted); text-decoration:underline; }
.cite a:hover{ color:var(--accent); }

/* ---------- 목업(재현 화면) ---------- */
.mockup-caption{ font-size:12px; color:var(--ink-muted); text-align:center; margin-top:6px; }
.browser-mock{ border:1px solid var(--line); border-radius:var(--radius); overflow:hidden; margin:14px 0; }
.browser-mock .bar{ background:var(--surface-2); padding:8px 12px; display:flex; align-items:center; gap:6px; }
.browser-mock .dotc{ width:8px; height:8px; border-radius:50%; background:var(--line); }
.browser-mock .url{ margin-left:10px; background:var(--surface); border-radius:5px; padding:4px 10px; font-size:12px; color:var(--ink-muted); font-family:"JetBrains Mono",monospace; }
.browser-mock .content{ background:#171B20; padding:40px 16px; text-align:center; }
.browser-mock .card2{ display:inline-block; background:rgba(255,255,255,.06); border:1px solid rgba(255,255,255,.12); border-radius:10px; padding:20px 32px; }
.browser-mock .card2 h4{ color:#F4F5F1; margin:0 0 6px; font-size:19px; }
.browser-mock .card2 p{ color:#9BA0A8; margin:0; font-size:13.5px; }

.chat-mock{ border:1px solid var(--line); border-radius:var(--radius); overflow:hidden; margin:14px 0; font-size:14px; }
.chat-mock .head{ background:var(--surface-2); border-bottom:1px solid var(--line); padding:9px 14px; font-weight:700; }
.chat-mock .body{ padding:16px; background:var(--surface); }
.chat-mock .bubble{ background:var(--accent-soft); border-radius:10px; padding:9px 14px; display:inline-block; margin-bottom:14px; }
.chat-mock .checklist{ list-style:none; padding-left:0; }
.chat-mock .checklist li{ margin-bottom:6px; padding-left:20px; position:relative; }
.chat-mock .checklist li.done::before{ content:"완료"; position:absolute; left:0; top:1px; font-size:10px; font-family:"JetBrains Mono",monospace; color:var(--accent); border:1px solid var(--accent); border-radius:4px; padding:0 4px; }
.chat-mock .checklist li.doing::before{ content:"진행"; position:absolute; left:0; top:1px; font-size:10px; font-family:"JetBrains Mono",monospace; color:var(--ink-muted); border:1px solid var(--line); border-radius:4px; padding:0 4px; }
.chat-mock .checklist li{ padding-left:38px; }

.github-mock{ border:1px solid var(--line); border-radius:var(--radius); overflow:hidden; margin:14px 0; font-size:14px; }
.github-mock .head{ background:var(--surface-2); border-bottom:1px solid var(--line); padding:9px 14px; font-weight:700; color:var(--ink); }
.github-mock .row{ display:flex; justify-content:space-between; align-items:center; padding:14px; gap:14px; }
.github-mock .row div.label b{ display:block; }
.github-mock .row div.label span{ color:var(--ink-muted); font-size:12.5px; }
.github-mock button{ border:1px solid var(--ink-muted); color:var(--ink); background:var(--surface); padding:6px 12px; border-radius:6px; font-size:12.5px; white-space:nowrap; }

/* ---------- 링크 한 줄 표시 ---------- */
.link-line{ font-size:13px; margin:8px 0 0; color:var(--ink-muted); }
.link-line a{ color:var(--accent); }

/* ---------- 목록형 TOC(목차) 페이지 카드 ---------- */
.toc-list{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:14px; }
.toc-item{ display:block; border:1px solid var(--line); border-radius:var(--radius); padding:18px 20px; text-decoration:none; color:inherit; background:var(--surface); transition:border-color .15s, background .15s; }
.toc-item:hover{ border-color:var(--accent); background:var(--accent-soft); }
.toc-item h2{ display:inline; font-size:16.5px; margin:0; }
.toc-item p{ margin:8px 0 0; font-size:14px; color:var(--ink-muted); padding-left:34px; }

/* ---------- 푸터 ---------- */
footer.page-footer{
  margin-top:56px;
  padding-top:18px;
  border-top:1px solid var(--line);
  color:var(--ink-muted);
  font-size:12.5px;
  text-align:center;
}
footer.page-footer a{ color:var(--ink-muted); }
footer.page-footer a:hover{ color:var(--accent); }