/* ==========================================================================
   cmore.dev — 공유 스타일
   외부 리소스 요청 0. 시스템 폰트 + 로컬 Pretendard 폴백.
   ========================================================================== */

:root {
  --brand: #6c9dff;
  --brand-strong: #4d84f5;
  --brand-soft: rgba(108, 157, 255, 0.12);

  --bg: #ffffff;
  --bg-soft: #f5f7fb;
  --bg-card: #ffffff;
  --border: #e6e9f0;
  --text: #1c2230;
  --text-soft: #5a6274;
  --text-faint: #8a92a6;

  --code-bg: #0f1526;
  --code-text: #e6ebff;
  --code-border: #1e2740;

  --radius: 16px;
  --radius-sm: 10px;
  --maxw: 960px;
  --shadow: 0 1px 2px rgba(20, 30, 60, 0.04), 0 8px 28px rgba(20, 30, 60, 0.06);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0c1017;
    --bg-soft: #121826;
    --bg-card: #141a28;
    --border: #232c40;
    --text: #eaeef7;
    --text-soft: #a9b2c6;
    --text-faint: #7d879d;

    --code-bg: #0a0f1c;
    --code-text: #e6ebff;
    --code-border: #222c46;

    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 10px 30px rgba(0, 0, 0, 0.35);
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Pretendard", "Noto Sans KR",
    "Apple SD Gothic Neo", "Segoe UI", Roboto, sans-serif;
  font-size: 18px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  word-break: keep-all;
}

/* ---------- 레이아웃 ---------- */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
}

section {
  padding: 64px 0;
}

section + section {
  border-top: 1px solid var(--border);
}

/* ---------- 타이포 ---------- */
h1, h2, h3 {
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--text);
  margin: 0 0 0.5em;
}

h1 { font-size: clamp(1.9rem, 5vw, 2.9rem); font-weight: 800; }
h2 { font-size: clamp(1.5rem, 3.5vw, 2rem); font-weight: 750; margin-top: 0; }
h3 { font-size: 1.2rem; font-weight: 700; }

p { margin: 0 0 1em; }

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

.lead {
  font-size: clamp(1.05rem, 2.4vw, 1.25rem);
  color: var(--text-soft);
  max-width: 44ch;
}

.eyebrow {
  display: inline-block;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--brand-strong);
  background: var(--brand-soft);
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 18px;
}

.muted { color: var(--text-soft); }

/* ---------- 상단 네비 ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  gap: 18px;
  min-height: 60px;
  flex-wrap: wrap;
  padding: 10px 20px;
  max-width: var(--maxw);
  margin: 0 auto;
}

.brand {
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  color: var(--text);
  white-space: nowrap;
}
.brand:hover { text-decoration: none; }
.brand .dot { color: var(--brand); }

.nav-links {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  margin-left: auto;
}

.nav-links a {
  color: var(--text-soft);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 999px;
  white-space: nowrap;
}
.nav-links a:hover { color: var(--text); background: var(--bg-soft); text-decoration: none; }
.nav-links a.active { color: var(--brand-strong); background: var(--brand-soft); }

/* ---------- 문서형 사이드바 레이아웃 ---------- */
.layout { width: 100%; }

.content { min-width: 0; }

.sidebar-brand {
  display: block;
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  color: var(--text);
  margin: 0 0 22px;
  padding: 0 12px;
}
.sidebar-brand:hover { text-decoration: none; color: var(--brand-strong); }

.sidebar-nav ul {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
}
.sidebar-nav ul:last-child { margin-bottom: 0; }
.sidebar-group {
  margin: 0 0 6px;
  padding: 0 12px;
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-faint);
}
.sidebar-nav li { margin: 0; }
.sidebar-nav a {
  display: block;
  padding: 7px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-soft);
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.4;
}
.sidebar-nav a:hover {
  background: var(--bg-soft);
  color: var(--text);
  text-decoration: none;
}
.sidebar-nav a[aria-current="page"] {
  background: var(--brand-soft);
  color: var(--brand-strong);
}

/* 모바일 접이식 토글 (순수 HTML/CSS, JS 없음) */
.sidebar-toggle {
  margin: 20px 20px 4px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
}
.sidebar-toggle summary {
  cursor: pointer;
  padding: 12px 18px;
  font-weight: 700;
  color: var(--text);
  list-style: none;
  display: flex;
  align-items: center;
  gap: 10px;
}
.sidebar-toggle summary::-webkit-details-marker { display: none; }
.sidebar-toggle summary::before {
  content: "☰";
  color: var(--brand-strong);
  font-size: 1.05rem;
}
.sidebar-toggle[open] summary::before { content: "✕"; }
.sidebar-toggle .sidebar-nav {
  padding: 6px 8px 12px;
  border-top: 1px solid var(--border);
}

/* 가이드(문서) 페이지: 랜딩보다 촘촘한 세로 리듬 */
.content .hero { padding: 44px 0 6px; }
.content .hero .lead { margin-bottom: 18px; }
.content section { padding: 30px 0; }

/* 데스크톱: 고정 좌측 사이드바 */
@media (min-width: 960px) {
  .sidebar {
    position: fixed;
    top: 0; left: 0; bottom: 0;
    width: 240px;
    overflow-y: auto;
    padding: 30px 14px;
    background: var(--bg-soft);
    border-right: 1px solid var(--border);
  }
  .content { margin-left: 240px; }
  .content .wrap { max-width: 68ch; }
  .sidebar-toggle { display: none; }
}

/* 모바일/태블릿: 고정 사이드바 없음 */
@media (max-width: 959.98px) {
  .sidebar { display: none; }
}

/* ---------- 히어로 ---------- */
.hero {
  padding: 72px 0 56px;
  background:
    radial-gradient(1000px 480px at 78% -12%, var(--brand-soft), transparent 70%);
}
.hero h1 { max-width: 18ch; }
.hero .lead { max-width: 50ch; margin-bottom: 30px; }

/* ---------- 버튼 ---------- */
.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 1rem;
  font-weight: 700;
  padding: 13px 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.06s ease, background 0.15s ease, border-color 0.15s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary { background: var(--brand); color: #ffffff; }
.btn-primary:hover { background: var(--brand-strong); color: #fff; }

.btn-ghost {
  background: var(--bg-card);
  color: var(--text);
  border-color: var(--border);
}
.btn-ghost:hover { border-color: var(--brand); color: var(--brand-strong); }

/* ---------- 카드 ---------- */
.grid {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}
.card h3 { margin-top: 0; }
.card p:last-child { margin-bottom: 0; }

.card-link { display: block; color: inherit; transition: border-color 0.15s ease, transform 0.08s ease; }
.card-link:hover { border-color: var(--brand); transform: translateY(-2px); text-decoration: none; }
.card-link .go { color: var(--brand-strong); font-weight: 700; font-size: 0.95rem; }

/* ---------- 문제 목록 (체크/막힘 리스트) ---------- */
.pain-list {
  list-style: none;
  padding: 0;
  margin: 24px 0 0;
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}
.pain-list li {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 18px 14px 44px;
  position: relative;
  color: var(--text);
  font-size: 1rem;
}
.pain-list li::before {
  content: "";
  position: absolute;
  left: 16px; top: 50%;
  width: 14px; height: 14px;
  margin-top: -7px;
  border-radius: 50%;
  background: var(--brand-soft);
  border: 2px solid var(--brand);
}

.check-list {
  list-style: none;
  padding: 0;
  margin: 20px 0 0;
  display: grid;
  gap: 10px;
}
.check-list li {
  padding-left: 32px;
  position: relative;
  font-size: 1.02rem;
}
.check-list li::before {
  content: "✓";
  position: absolute;
  left: 0; top: 0;
  color: var(--brand-strong);
  font-weight: 800;
}

/* ---------- 코드 블록 ---------- */
.code {
  position: relative;
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: var(--radius-sm);
  margin: 16px 0;
}
.code-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-bottom: 1px solid var(--code-border);
  color: #9fb0d8;
  font-size: 0.82rem;
  font-weight: 600;
}
.code pre {
  margin: 0;
  padding: 16px;
  overflow-x: auto;
  color: var(--code-text);
  font-family: "SFMono-Regular", ui-monospace, Menlo, Consolas, monospace;
  font-size: 0.92rem;
  line-height: 1.6;
}
.code pre code { white-space: pre; }

.copy-btn {
  appearance: none;
  border: 1px solid var(--code-border);
  background: rgba(255, 255, 255, 0.06);
  color: #cdd8f5;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
  white-space: nowrap;
}
.copy-btn:hover { background: var(--brand); color: #fff; border-color: var(--brand); }
.copy-btn.copied { background: #21b57a; color: #fff; border-color: #21b57a; }

/* ---------- OS 카드 (설치 명령) ---------- */
.os-cards { display: grid; gap: 18px; }
.os-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
  box-shadow: var(--shadow);
}
.os-card h3 { display: flex; align-items: center; gap: 10px; }
.os-card .code { margin-bottom: 0; }

/* ---------- 안심 포인트 ---------- */
.assure {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  margin-top: 24px;
}
.assure div {
  background: var(--brand-soft);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
}
.assure strong { display: block; margin-bottom: 4px; color: var(--text); }
.assure span { color: var(--text-soft); font-size: 0.95rem; }

/* ---------- 도구 테이블/리스트 ---------- */
.tool-group { margin-top: 36px; }
.tool-group h3 {
  padding-bottom: 8px;
  border-bottom: 2px solid var(--brand-soft);
  margin-bottom: 8px;
}
.tool-list { list-style: none; padding: 0; margin: 0; }
.tool-list li {
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 6px 20px;
  align-items: baseline;
}
.tool-list li:last-child { border-bottom: none; }
.tool-list .name {
  font-weight: 700;
  font-family: "SFMono-Regular", ui-monospace, Menlo, Consolas, monospace;
  font-size: 0.98rem;
  color: var(--brand-strong);
}
.tool-list .desc { color: var(--text-soft); }
@media (max-width: 560px) {
  .tool-list li { grid-template-columns: 1fr; gap: 2px; }
}

/* ---------- 콜아웃 ---------- */
.callout {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-left: 4px solid var(--brand);
  border-radius: var(--radius-sm);
  padding: 18px 22px;
  margin: 28px 0;
}
.callout p:last-child { margin-bottom: 0; }

.next-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
  font-weight: 700;
}

/* ---------- 비유 박스 ---------- */
.analogy {
  background: linear-gradient(180deg, var(--brand-soft), transparent);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  margin: 24px 0;
  font-size: 1.1rem;
}

/* ---------- 푸터 ---------- */
.footer {
  border-top: 1px solid var(--border);
  background: var(--bg-soft);
  padding: 40px 0;
  color: var(--text-soft);
  font-size: 0.95rem;
}
.footer .wrap { display: flex; flex-wrap: wrap; gap: 12px 24px; align-items: center; justify-content: space-between; }
.footer a { color: var(--text-soft); font-weight: 600; }
.footer a:hover { color: var(--brand-strong); }

/* ---------- 루트 허브 ---------- */
.hub {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 60px 20px;
  background:
    radial-gradient(760px 380px at 50% 0%, var(--brand-soft), transparent 70%);
}
.hub .name { font-size: clamp(2.4rem, 8vw, 4rem); font-weight: 800; letter-spacing: -0.03em; }
.hub .name .dot { color: var(--brand); }
.hub .tagline { color: var(--text-soft); font-size: 1.15rem; margin-top: 6px; }
.hub .panel {
  margin-top: 44px;
  max-width: 520px;
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 34px 30px;
  text-align: left;
}
.hub .panel .eyebrow { margin-bottom: 12px; }
.hub .panel h2 { font-size: 1.6rem; }

/* ---------- 유틸 ---------- */
.center { text-align: center; }
.mt-0 { margin-top: 0; }
.stack > * + * { margin-top: 16px; }
.divider-note { color: var(--text-faint); font-size: 0.9rem; margin-top: 10px; }

.skip {
  position: absolute;
  left: -9999px;
}
.skip:focus {
  left: 12px; top: 12px;
  background: var(--brand); color: #fff;
  padding: 8px 14px; border-radius: 8px; z-index: 100;
}

/* 404 */
.notfound {
  min-height: 78dvh;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  text-align: center; padding: 40px 20px;
}
.notfound .big { font-size: clamp(4rem, 18vw, 8rem); font-weight: 800; color: var(--brand); line-height: 1; }