/* ============================================
   CHRIS OS — 讀書筆記頁樣式
   沿用 index.html 的設計 token，獨立成檔供各筆記頁共用
   ============================================ */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --paper: #faf7ef;
  --paper-dark: #f2edde;
  --ink: #20222e;
  --ink-light: #565a6b;
  --ink-faint: #9095a5;
  --indigo: #3a5fa8;
  --indigo-deep: #2b4880;
  --vermilion: #d94f3d;
  --gold: #d9a441;
  --term-bg: #14161f;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Noto Sans TC', sans-serif;
  -webkit-font-smoothing: antialiased;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.85;
}

::selection { background: var(--gold); color: var(--ink); }

a { color: var(--indigo); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--indigo-deep); }

/* ===== 頂列 ===== */
.note-topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 24px;
  background: rgba(250, 247, 239, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(32, 34, 46, 0.08);
  font-family: 'Fira Code', monospace;
  font-size: 11px;
  letter-spacing: 0.04em;
}
.note-topbar a { color: var(--ink-light); text-decoration: none; }
.note-topbar a:hover { color: var(--indigo); }
.note-topbar .tb-brand { font-weight: 700; color: var(--ink); }
.note-topbar .tb-spacer { flex: 1; }

/* ===== 文章容器 ===== */
.note {
  max-width: 720px;
  margin: 0 auto;
  padding: 56px 24px 120px;
}

.note-kicker {
  font-family: 'Fira Code', monospace;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 14px;
}

.note h1 {
  font-family: 'Noto Serif TC', serif;
  font-weight: 900;
  font-size: clamp(28px, 5vw, 42px);
  line-height: 1.35;
  letter-spacing: -0.01em;
  margin-bottom: 18px;
}

.note-source {
  font-size: 13.5px;
  color: var(--ink-light);
  padding: 12px 16px;
  background: var(--paper-dark);
  border-left: 3px solid var(--ink-faint);
  border-radius: 0 6px 6px 0;
  line-height: 1.7;
}
.note-source cite { font-style: normal; font-weight: 500; }

.note-cover {
  margin: 32px 0 8px;
}
.note-cover img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  display: block;
}
.note-cover figcaption {
  font-size: 11.5px;
  color: var(--ink-faint);
  margin-top: 8px;
  font-family: 'Fira Code', monospace;
}

/* ===== 區塊 ===== */
.note section { margin-top: 48px; }

.note h2 {
  font-family: 'Noto Serif TC', serif;
  font-weight: 700;
  font-size: 21px;
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(32, 34, 46, 0.1);
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.note h2::before {
  content: attr(data-num);
  font-family: 'Fira Code', monospace;
  font-size: 11px;
  font-weight: 500;
  color: var(--indigo);
  letter-spacing: 0.08em;
}

.note p { margin-bottom: 18px; font-size: 16px; }
.note p:last-child { margin-bottom: 0; }

.note strong { font-weight: 700; }
.note code {
  font-family: 'Fira Code', monospace;
  font-size: 0.88em;
  background: var(--paper-dark);
  padding: 2px 6px;
  border-radius: 4px;
}

/* 我的想法：整篇最重的一塊 */
#my-take {
  background: #fff;
  border: 1px solid rgba(32, 34, 46, 0.08);
  border-radius: 12px;
  padding: 28px 30px;
  box-shadow: 0 4px 20px rgba(32, 34, 46, 0.05);
}
#my-take h2 { border-bottom-color: rgba(58, 95, 168, 0.2); }
#my-take h2::before { color: var(--vermilion); }
#my-take p { font-size: 16.5px; }

/* 這篇在說什麼 */
#summary ol { padding-left: 0; list-style: none; counter-reset: pt; }
#summary ol > li {
  counter-increment: pt;
  position: relative;
  padding-left: 38px;
  margin-bottom: 16px;
  font-size: 15.5px;
}
#summary ol > li::before {
  content: counter(pt, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0.15em;
  font-family: 'Fira Code', monospace;
  font-size: 11px;
  font-weight: 700;
  color: var(--indigo);
  background: var(--paper-dark);
  border-radius: 4px;
  padding: 2px 6px;
}
.note ul { padding-left: 20px; margin-bottom: 18px; }
.note ul li { margin-bottom: 8px; font-size: 15.5px; }

/* 原文金句 */
#quotes blockquote {
  border-left: 3px solid var(--gold);
  padding: 4px 0 4px 20px;
  margin-bottom: 22px;
  color: var(--ink-light);
  font-family: 'Noto Serif TC', serif;
  font-size: 16px;
  line-height: 1.8;
}
#quotes blockquote p { margin-bottom: 10px; }

/* ===== 頁尾 ===== */
.note-foot {
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid rgba(32, 34, 46, 0.1);
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.note-foot a {
  font-size: 13px;
  text-decoration: none;
  padding: 9px 16px;
  border-radius: 999px;
  border: 1px solid rgba(32, 34, 46, 0.15);
  color: var(--ink-light);
  transition: all 0.2s ease;
}
.note-foot a:hover { border-color: var(--indigo); color: var(--indigo); }
.note-foot a.primary { background: var(--indigo); color: #fff; border-color: var(--indigo); }
.note-foot a.primary:hover { background: var(--indigo-deep); color: #fff; }

.note-tags { margin-top: 20px; display: flex; flex-wrap: wrap; gap: 6px; }
.note-tag {
  font-family: 'Fira Code', monospace;
  font-size: 10.5px;
  padding: 3px 9px;
  border-radius: 999px;
  background: var(--paper-dark);
  color: var(--ink-light);
}

@media (max-width: 640px) {
  .note { padding: 36px 18px 90px; }
  #my-take { padding: 22px 20px; }
  .note-topbar { padding: 10px 16px; gap: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

/* 分享用短連結 */
.note-short {
  max-width: 720px;
  margin: 14px auto 0;
  padding: 0 24px;
  font-size: 12.5px;
  color: var(--ink-faint);
}
.note-short code {
  font-family: 'Fira Code', monospace;
  font-size: 12px;
  background: var(--paper-dark);
  padding: 3px 7px;
  border-radius: 4px;
  word-break: break-all;
}
.note-short a { text-decoration: none; }
.note-short a:hover code { background: #eee6cf; }