/* ================================================================
   Spine Annotator 매뉴얼 페이지 스타일
   - 기존 앱 스타일과 독립 (인쇄 친화적)
   - 다크 테마 + 읽기 좋은 본문 폭
   ================================================================ */

* {
  box-sizing: border-box;
}

:root {
  --bg: #0f1419;
  --bg-card: #1a2028;
  --bg-elev: #232b35;
  --border: #2d3744;
  --text: #e6edf3;
  --text-dim: #9da9b5;
  --primary: #4f9ef8;
  --primary-dim: #6db1ff;
  --accent: #7ee787;
  --warn: #f0b35e;
  --danger: #ff7a7a;
  --kbd-bg: #2a3340;
  --kbd-border: #3a4554;
  --code-bg: #0d1117;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Pretendard",
    "Noto Sans KR", "Apple SD Gothic Neo", sans-serif;
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* ----------------------------------------------------------------
   상단 헤더
   ---------------------------------------------------------------- */
.manual-header {
  background: linear-gradient(135deg, #1a2734 0%, #0f1419 100%);
  border-bottom: 1px solid var(--border);
  padding: 32px 0;
}

.manual-header-inner {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 24px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-dim);
  text-decoration: none;
  font-size: 13px;
  margin-bottom: 8px;
  transition: color 0.15s;
}
.back-link:hover {
  color: var(--primary-dim);
}

.manual-header h1 {
  font-size: 28px;
  margin: 0;
  font-weight: 700;
  letter-spacing: -0.3px;
}
.manual-header h1 i {
  color: var(--primary);
  margin-right: 8px;
}

.manual-meta {
  margin-top: 6px;
  font-size: 13px;
  color: var(--text-dim);
}

/* ----------------------------------------------------------------
   목차 (sticky)
   ---------------------------------------------------------------- */
.manual-toc {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 16px 24px;
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(8px);
  background: rgba(26, 32, 40, 0.92);
}

.manual-toc strong {
  display: block;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-dim);
  margin-bottom: 8px;
  max-width: 880px;
  margin-left: auto;
  margin-right: auto;
}

.manual-toc ol {
  max-width: 880px;
  margin: 0 auto;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  counter-reset: toc;
}

.manual-toc li {
  counter-increment: toc;
}

.manual-toc a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 13px;
  padding: 4px 10px;
  border-radius: 6px;
  background: var(--bg-elev);
  transition: all 0.15s;
  display: inline-block;
}
.manual-toc a::before {
  content: counter(toc) ". ";
  color: var(--primary);
  font-weight: 600;
}
.manual-toc a:hover {
  background: var(--primary);
  color: #fff;
}
.manual-toc a:hover::before {
  color: #fff;
}

/* ----------------------------------------------------------------
   본문
   ---------------------------------------------------------------- */
.manual-main {
  max-width: 880px;
  margin: 0 auto;
  padding: 32px 24px 80px;
}

section {
  margin-bottom: 56px;
  scroll-margin-top: 80px; /* sticky TOC 만큼 띄우기 */
}

h2 {
  font-size: 22px;
  margin: 0 0 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--border);
  color: var(--text);
  font-weight: 700;
}

h3 {
  font-size: 16px;
  margin: 24px 0 10px;
  color: var(--primary-dim);
  font-weight: 600;
}

p {
  margin: 10px 0;
  color: var(--text);
}

ul, ol {
  margin: 10px 0;
  padding-left: 24px;
}
li { margin: 4px 0; }

strong { color: var(--text); font-weight: 600; }
em { color: var(--primary-dim); font-style: normal; font-weight: 500; }

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

code {
  background: var(--code-bg);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: "SF Mono", Monaco, Consolas, "Courier New", monospace;
  font-size: 13px;
  color: var(--accent);
}

code.block {
  display: block;
  padding: 12px 14px;
  margin: 8px 0;
  border: 1px solid var(--border);
  font-size: 13px;
}

pre.code-block {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  overflow-x: auto;
  font-family: "SF Mono", Monaco, Consolas, monospace;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--text);
}

/* ----------------------------------------------------------------
   kbd (단축키 표시)
   ---------------------------------------------------------------- */
kbd {
  display: inline-block;
  padding: 2px 8px;
  font-family: inherit;
  font-size: 12px;
  font-weight: 600;
  background: var(--kbd-bg);
  border: 1px solid var(--kbd-border);
  border-bottom-width: 2px;
  border-radius: 5px;
  color: var(--text);
  margin: 0 1px;
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.4);
  min-width: 22px;
  text-align: center;
}

/* ----------------------------------------------------------------
   UI 버튼 모방 (매뉴얼 안에서 헤더 버튼 표시할 때)
   ---------------------------------------------------------------- */
.ui-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 5px;
  font-size: 13px;
  color: var(--text);
  vertical-align: middle;
}
.ui-btn.primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.ui-btn i {
  font-size: 11px;
  opacity: 0.9;
}

/* ----------------------------------------------------------------
   특수 박스
   ---------------------------------------------------------------- */
.callout {
  display: flex;
  gap: 12px;
  padding: 14px 16px;
  margin: 16px 0;
  border-radius: 8px;
  border-left: 4px solid;
  background: var(--bg-card);
}
.callout > i {
  font-size: 18px;
  flex-shrink: 0;
  margin-top: 2px;
}
.callout > div { flex: 1; }
.callout.info {
  border-color: var(--primary);
}
.callout.info > i { color: var(--primary); }
.callout.tip {
  border-color: var(--accent);
}
.callout.tip > i { color: var(--accent); }
.callout.warn {
  border-color: var(--warn);
}
.callout.warn > i { color: var(--warn); }

/* ----------------------------------------------------------------
   feature-list (개요 페이지)
   ---------------------------------------------------------------- */
.feature-list {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 8px;
  margin: 16px 0;
}
.feature-list li {
  padding: 10px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
}
.feature-list i {
  color: var(--primary);
  font-size: 14px;
  width: 18px;
  text-align: center;
}

/* ----------------------------------------------------------------
   steps (절차)
   ---------------------------------------------------------------- */
.steps {
  list-style: none;
  padding: 0;
  counter-reset: step;
}
.steps > li {
  position: relative;
  padding: 12px 16px 12px 48px;
  margin: 8px 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  counter-increment: step;
}
.steps > li::before {
  content: counter(step);
  position: absolute;
  left: 14px;
  top: 12px;
  width: 24px;
  height: 24px;
  background: var(--primary);
  color: #fff;
  font-weight: 700;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}
.steps > li > strong:first-child {
  display: block;
  font-size: 14.5px;
  color: var(--primary-dim);
  margin-bottom: 4px;
}
.steps > li p {
  margin: 4px 0;
  font-size: 14px;
  color: var(--text-dim);
}
.steps > li p strong { color: var(--text); }
.steps ul {
  margin: 6px 0 0;
  font-size: 13.5px;
}

/* ----------------------------------------------------------------
   action-table (동작 표)
   ---------------------------------------------------------------- */
.action-table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0;
  font-size: 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}
.action-table th,
.action-table td {
  padding: 8px 14px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: middle;
}
.action-table tbody tr:last-child td,
.action-table tr:last-child td {
  border-bottom: none;
}
.action-table thead th {
  background: var(--bg-elev);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-dim);
}
.action-table td:first-child {
  width: 38%;
  color: var(--primary-dim);
  font-weight: 500;
}
.action-table tr:hover td {
  background: rgba(79, 158, 248, 0.04);
}

/* ----------------------------------------------------------------
   뱃지 (AP/LAT, 라벨 점)
   ---------------------------------------------------------------- */
.badge {
  display: inline-block;
  padding: 1px 8px;
  font-size: 11px;
  font-weight: 700;
  border-radius: 3px;
  color: #fff;
  vertical-align: middle;
}
.badge.ap { background: #4f9ef8; }
.badge.lat { background: #b46df0; }

.dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  vertical-align: middle;
  margin: 0 2px;
}
.dot.gray { background: #5a6675; }
.dot.green { background: var(--accent); }

/* ----------------------------------------------------------------
   details (FAQ)
   ---------------------------------------------------------------- */
details {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0;
  margin: 8px 0;
  overflow: hidden;
}
details summary {
  cursor: pointer;
  padding: 12px 16px;
  font-weight: 600;
  color: var(--text);
  list-style: none;
  position: relative;
  user-select: none;
  transition: background 0.1s;
}
details summary::-webkit-details-marker { display: none; }
details summary::before {
  content: "▸";
  display: inline-block;
  margin-right: 8px;
  color: var(--primary);
  transition: transform 0.15s;
}
details[open] summary::before {
  transform: rotate(90deg);
}
details summary:hover {
  background: rgba(79, 158, 248, 0.04);
}
details[open] summary {
  border-bottom: 1px solid var(--border);
}
details ul, details ol, details p {
  padding: 0 16px 14px 40px;
  margin: 8px 0 0;
  font-size: 14px;
}
details ul, details ol {
  padding-left: 56px;
}

/* ----------------------------------------------------------------
   푸터
   ---------------------------------------------------------------- */
.manual-footer {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-dim);
  font-size: 13px;
}
.manual-footer i {
  color: var(--primary);
}

/* ----------------------------------------------------------------
   반응형
   ---------------------------------------------------------------- */
@media (max-width: 640px) {
  .manual-header h1 { font-size: 22px; }
  .manual-toc ol { gap: 4px 8px; }
  .manual-toc a { font-size: 12px; padding: 3px 8px; }
  h2 { font-size: 19px; }
  h3 { font-size: 15px; }
  body { font-size: 14px; }
  .steps > li { padding-left: 44px; }
  .action-table { font-size: 13px; }
  .action-table th, .action-table td { padding: 6px 10px; }
}

/* ----------------------------------------------------------------
   인쇄
   ---------------------------------------------------------------- */
@media print {
  body { background: #fff; color: #000; }
  .manual-toc, .back-link { display: none; }
  .manual-header { background: #fff; color: #000; border-bottom: 2px solid #000; }
  .manual-header h1 { color: #000; }
  section { page-break-inside: avoid; }
  details { border: 1px solid #999; }
  details:not([open]) { display: block; }
  details summary { background: #f5f5f5; color: #000; }
  details[open] summary { background: #eee; }
  pre.code-block { background: #f5f5f5; color: #000; border: 1px solid #999; }
  code { background: #f5f5f5; color: #000; }
  kbd { background: #f0f0f0; color: #000; border-color: #999; }
}