/* ============================================================
   Zero-Library · Agent 时代的核心概念
   ------------------------------------------------------------
   设计取向 —— 现代科技风、简洁、克制
   - 字体方案与 zero-perspective-hub 完全一致(同源)
     · Inter (Latin) — Google Fonts
     · LXGW WenKai / 霞鹜文楷 (中文) — jsdelivr @latest
     · JetBrains Mono (英文代码) — Google Fonts
   - 主页:无装饰 SVG、留白主导、单色 + 一点强调色
   - 内文章节:左侧目录 + 右侧正文的"书页"版式,但视觉收敛
   ============================================================ */

@import url("https://cdn.jsdelivr.net/npm/lxgw-wenkai-webfont@latest/style.css");
@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap");

:root {
  /* 字体栈 —— 与参考站完全一致 */
  --font-base: "Inter", "LXGW WenKai Screen", "LXGW WenKai", "霞鹜文楷",
                "Noto Serif SC", "Source Han Serif SC", -apple-system,
                BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-kai:  "LXGW WenKai", "霞鹜文楷", "STKaiti", "KaiTi", "Kaiti SC", serif;
  --font-mono: "JetBrains Mono", "LXGW WenKai Mono", "LXGW WenKai",
                "SFMono-Regular", Menlo, Monaco, Consolas, monospace;

  /* 极简配色 —— 浅色:纯白 + 墨黑 + 极淡灰 */
  --bg:         #ffffff;
  --bg-elev:    #ffffff;
  --bg-soft:    #f6f6f4;
  --ink:        #0a0a0a;
  --ink-2:      #555555;
  --ink-3:      #999999;
  --border:     #ececec;
  --border-2:   #dcdcdc;
  --accent:     #0a0a0a;
  --accent-2:   #555555;
  --accent-soft:rgba(0, 0, 0, 0.04);
  --code-bg:    #0a0a0a;
  --code-fg:    #f5f4ef;

  --radius:     10px;
  --radius-sm:  6px;
  --maxw:       1180px;
}

[data-theme="dark"] {
  --bg:         #0a0a0a;
  --bg-elev:    #0a0a0a;
  --bg-soft:    #161616;
  --ink:        #f0f0ee;
  --ink-2:      #a8a8a8;
  --ink-3:      #6a6a6a;
  --border:     #1f1f1f;
  --border-2:   #2a2a2a;
  --accent:     #f0f0ee;
  --accent-2:   #b8b8b8;
  --accent-soft:rgba(255, 255, 255, 0.05);
  --code-bg:    #050505;
  --shadow-md:  0 4px 12px rgba(0, 0, 0, 0.5), 0 1px 3px rgba(0, 0, 0, 0.35);
  --shadow-lg:  0 12px 40px rgba(0, 0, 0, 0.7);
}

/* ---------- 基础 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-base);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color 0.25s ease, color 0.25s ease;
}
::selection { background: var(--accent-soft); color: var(--ink); }
a { color: var(--accent); text-decoration: none; transition: color 0.15s ease; }
a:hover { color: var(--accent-2); }
img { max-width: 100%; display: block; }
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-base);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 0 0 0.6em;
}
code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--bg-soft);
  padding: 0.15em 0.45em;
  border-radius: 4px;
  color: var(--accent);
  border: 1px solid var(--border);
}
pre {
  font-family: var(--font-mono);
  background: var(--code-bg);
  color: var(--code-fg);
  padding: 1rem 1.2rem;
  border-radius: var(--radius);
  overflow-x: auto;
  font-size: 0.88em;
  line-height: 1.6;
}
pre code {
  background: none;
  border: none;
  padding: 0;
  color: inherit;
}

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ---------- 阅读进度条 ---------- */
.lib-progress {
  position: fixed; top: 0; left: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  width: 0%;
  z-index: 200;
  transition: width 0.1s linear;
  pointer-events: none;
}

/* ---------- 导航 ---------- */
.lib-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--border);
}
.lib-nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  gap: 2rem;
}
.lib-nav__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--ink);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}
.lib-nav__brand:hover { color: var(--ink); }
.lib-nav__brand .logo-mark { width: 22px; height: 22px; color: var(--accent); }
.lib-nav__links {
  display: flex;
  align-items: center;
  gap: 1.6rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.lib-nav__links a {
  color: var(--ink-2);
  font-size: 0.92rem;
  font-weight: 500;
  transition: color 0.15s ease;
}
.lib-nav__links a:hover,
.lib-nav__links a.active { color: var(--ink); }
.lib-nav__actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.lib-icon-btn {
  width: 34px; height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--ink-2);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  transition: all 0.15s ease;
}
.lib-icon-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* 移动端抽屉 */
.lib-nav__drawer-toggle { display: none; }
.lib-drawer-overlay { display: none; }

@media (max-width: 820px) {
  .lib-nav__drawer-toggle {
    display: inline-flex;
    width: 36px; height: 36px;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--ink);
    cursor: pointer;
  }
  .lib-nav__links {
    position: fixed;
    top: 60px; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: min(280px, 80vw);
    background: var(--bg-elev);
    border-left: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
    transform: translateX(100%);
    transition: transform 0.25s ease;
  }
  .lib-nav__links.is-open { transform: translateX(0); }
  .lib-nav__links li a {
    display: block;
    padding: 0.7rem 1.4rem;
    font-size: 0.95rem;
  }
  .lib-drawer-overlay.is-open {
    display: block;
    position: fixed; inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 40;
  }
}

/* ============================================================
   首页 —— 极简
   - 大字 hero + 单一短介绍 + 一个 CTA
   - 8 行目录式概念列表(分三编,极细分隔线)
   - 三层文字块(三栏,无 bento)
   - 极简 footer:两行字
   - 几乎不用强调色、几乎不动效
   ============================================================ */

/* ---------- Hero ---------- */
.m-hero {
  padding: 7rem 0 6rem;
  border-bottom: 1px solid var(--border);
}
.m-hero__title {
  font-size: clamp(2.6rem, 6vw, 5rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.035em;
  margin: 0 0 1.5rem;
  color: var(--ink);
  max-width: 900px;
}
.m-hero__sub {
  font-size: 1.1rem;
  line-height: 1.6;
  color: var(--ink-2);
  max-width: 580px;
  margin: 0 0 2.5rem;
  font-weight: 400;
}
.m-hero__meta {
  display: flex;
  gap: 2rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--ink-3);
  letter-spacing: 0.04em;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}
.m-hero__meta span { display: inline-flex; gap: 0.4rem; }
.m-hero__meta .k { color: var(--ink-3); }
.m-hero__meta .v { color: var(--ink); }
.m-hero__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.4rem;
  background: var(--ink);
  color: var(--bg);
  border-radius: 6px;
  font-size: 0.92rem;
  font-weight: 500;
  transition: opacity 0.15s ease;
}
.m-hero__cta:hover { color: var(--bg); opacity: 0.75; }
.m-hero__cta--ghost {
  background: transparent;
  color: var(--ink);
  margin-left: 0.6rem;
  padding: 0.85rem 0;
  border-radius: 0;
  border-bottom: 1px solid var(--ink);
}
.m-hero__cta--ghost:hover { color: var(--ink); opacity: 1; border-color: var(--ink-2); }

/* ---------- 章节(section) ---------- */
.m-section {
  padding: 5rem 0;
  border-bottom: 1px solid var(--border);
}
.m-section__head {
  margin-bottom: 3rem;
}
.m-section__label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--ink-3);
  margin: 0 0 1rem;
}
.m-section__title {
  font-size: clamp(1.6rem, 2.6vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 0.6rem;
  color: var(--ink);
  max-width: 700px;
}
.m-section__sub {
  font-size: 1rem;
  color: var(--ink-2);
  margin: 0;
  max-width: 560px;
  line-height: 1.6;
}

/* ---------- 三编(目录分块) ---------- */
.m-toc {
  display: flex;
  flex-direction: column;
  gap: 3rem;
}
.m-toc__group {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 3rem;
  align-items: start;
}
.m-toc__group-label {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-3);
  padding-top: 0.4rem;
}
.m-toc__group-title {
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  margin: 0.2rem 0 0.4rem;
  color: var(--ink);
}
.m-toc__group-desc {
  font-size: 0.88rem;
  color: var(--ink-3);
  margin: 0;
  line-height: 1.55;
}
.m-toc__list {
  list-style: none;
  padding: 0;
  margin: 0;
  border-top: 1px solid var(--border);
}
.m-toc__row {
  display: grid;
  grid-template-columns: 48px 1fr auto;
  gap: 1.5rem;
  align-items: baseline;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--border);
  text-decoration: none;
  color: var(--ink);
  transition: padding-left 0.25s ease;
}
.m-toc__row:hover { padding-left: 0.6rem; color: var(--ink); }
.m-toc__row:hover .m-toc__name { color: var(--ink); }
.m-toc__num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-3);
  letter-spacing: 0.04em;
}
.m-toc__name {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.m-toc__name .en {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 400;
  color: var(--ink-3);
  letter-spacing: 0.06em;
  margin-left: 0.5rem;
}
.m-toc__row .arrow {
  font-family: var(--font-mono);
  color: var(--ink-3);
  font-size: 0.85rem;
  transition: transform 0.2s ease, color 0.15s ease;
}
.m-toc__row:hover .arrow { color: var(--ink); transform: translateX(3px); }

/* ---------- 三层(纯三栏文字块) ---------- */
.m-layers {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}
.m-layer__num {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--ink-3);
  letter-spacing: 0.04em;
  margin-bottom: 0.8rem;
}
.m-layer__name {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
  color: var(--ink);
}
.m-layer__desc {
  font-size: 0.9rem;
  color: var(--ink-2);
  line-height: 1.6;
  margin: 0 0 1.2rem;
}
.m-layer__list {
  list-style: none;
  padding: 0;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-3);
  letter-spacing: 0.04em;
  line-height: 1.9;
}
.m-layer__list a { color: var(--ink); }
.m-layer__list a:hover { color: var(--ink-2); }

/* ---------- Footer(极简两行) ---------- */
.m-footer {
  padding: 3rem 0 2.5rem;
}
.m-footer__row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--ink-3);
  letter-spacing: 0.04em;
}
.m-footer__links {
  display: flex;
  gap: 1.6rem;
  list-style: none;
  padding: 0;
  margin: 0;
}
.m-footer__links a { color: var(--ink-2); }
.m-footer__links a:hover { color: var(--ink); }

/* ---------- 响应式 ---------- */
@media (max-width: 820px) {
  .m-hero { padding: 4rem 0 3.5rem; }
  .m-section { padding: 3.5rem 0; }
  .m-toc__group { grid-template-columns: 1fr; gap: 1rem; }
  .m-toc__row { grid-template-columns: 40px 1fr auto; gap: 0.8rem; padding: 0.9rem 0; }
  .m-layers { grid-template-columns: 1fr; gap: 2rem; }
  .m-footer__row { flex-direction: column; align-items: flex-start; gap: 0.6rem; }
}
/* ============================================================
   书页(章节页) —— 左侧目录 + 右侧正文,版式与参考站一致
   ============================================================ */
.lib-book {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 0;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}
.lib-toc {
  position: sticky;
  top: 80px;
  align-self: start;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
  padding-right: 1.5rem;
  font-size: 0.88rem;
}
.lib-toc__title {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-3);
  margin-bottom: 1.2rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--border);
}
.lib-toc__group { margin-bottom: 1.5rem; }
.lib-toc__group-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--ink-2);
  margin-bottom: 0.5rem;
}
.lib-toc__list { list-style: none; padding: 0; margin: 0; }
.lib-toc__list li { margin: 0; }
.lib-toc__list a {
  display: block;
  padding: 0.3rem 0.6rem;
  color: var(--ink-2);
  border-radius: 4px;
  border-left: 2px solid transparent;
  margin-left: -2px;
  transition: all 0.12s ease;
}
.lib-toc__list a:hover {
  color: var(--ink);
  background: var(--bg-soft);
}
.lib-toc__list a.active {
  color: var(--accent);
  border-left-color: var(--accent);
  background: var(--accent-soft);
}

.lib-book__main { min-width: 0; }

.lib-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-3);
  margin-bottom: 1.5rem;
}
.lib-breadcrumb a { color: var(--ink-2); }
.lib-breadcrumb a:hover { color: var(--accent); }
.lib-breadcrumb__sep { color: var(--border-2); }
.lib-breadcrumb__current { color: var(--ink); }

/* Chapter header */
.lib-chapter-meta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-3);
  padding: 0.3rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-elev);
  margin-bottom: 1.4rem;
  flex-wrap: wrap;
}
.lib-chapter-meta__seal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px; height: 22px;
  border: 1px solid var(--accent);
  color: var(--accent);
  border-radius: 4px;
  font-weight: 700;
  font-size: 0.75rem;
}
.lib-chapter-meta__vol { color: var(--accent); font-weight: 500; }
.lib-chapter-meta__sep { color: var(--border-2); }

.lib-chapter__title {
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 0.6rem;
}
.lib-chapter__subtitle {
  font-size: 1.1rem;
  color: var(--ink-2);
  margin: 0 0 1.2rem;
  line-height: 1.5;
}
.lib-chapter__tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}
.lib-chapter__tags .tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.2rem 0.6rem;
  background: var(--bg-soft);
  color: var(--ink-2);
  border-radius: 4px;
  border: 1px solid var(--border);
}

/* 正文 */
.lib-prose {
  max-width: 720px;
  font-size: 1.02rem;
  line-height: 1.85;
  color: var(--ink);
}
.lib-prose h2 {
  font-size: 1.4rem;
  font-weight: 700;
  margin: 2.4rem 0 0.9rem;
  padding-top: 0.5rem;
  letter-spacing: -0.01em;
}
.lib-prose h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 1.8rem 0 0.7rem;
  color: var(--ink-2);
}
.lib-prose h2 .num {
  font-family: var(--font-mono);
  color: var(--accent);
  margin-right: 0.6rem;
  font-size: 0.9rem;
  vertical-align: 0.15em;
}
.lib-prose p { margin: 0 0 1.1rem; }
.lib-prose strong { color: var(--ink); font-weight: 600; }
.lib-prose em { color: var(--ink-2); font-style: italic; }
.lib-prose ul, .lib-prose ol { padding-left: 1.4rem; margin: 0 0 1.1rem; }
.lib-prose li { margin-bottom: 0.4rem; }
.lib-prose blockquote {
  border-left: 3px solid var(--accent);
  padding: 0.6rem 1.2rem;
  margin: 1.5rem 0;
  background: var(--accent-soft);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--ink);
  font-style: italic;
}
.lib-prose hr {
  border: none;
  height: 1px;
  background: var(--border);
  margin: 2.5rem auto;
  width: 60px;
}

.lib-prose pre {
  background: var(--code-bg);
  color: var(--code-fg);
  padding: 1.2rem 1.4rem;
  border-radius: var(--radius);
  overflow-x: auto;
  margin: 1.5rem 0;
  font-size: 0.86rem;
  line-height: 1.65;
}

/* 章内小目录(浮动) */
.lib-chapter__aside {
  position: fixed;
  right: 1.5rem;
  top: 80px;
  width: 200px;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem 1rem;
  font-size: 0.82rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
  z-index: 30;
}
.lib-chapter__aside.is-visible { opacity: 1; pointer-events: auto; }
.lib-chapter__aside__title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-3);
  margin-bottom: 0.8rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}
.lib-chapter__aside ul { list-style: none; padding: 0; margin: 0; }
.lib-chapter__aside li { margin: 0.3rem 0; }
.lib-chapter__aside a {
  display: block;
  padding: 0.25rem 0.5rem;
  color: var(--ink-2);
  border-radius: 4px;
  border-left: 2px solid transparent;
  margin-left: -2px;
}
.lib-chapter__aside a:hover { color: var(--ink); background: var(--bg-soft); }
.lib-chapter__aside a.is-active {
  color: var(--accent);
  border-left-color: var(--accent);
  background: var(--accent-soft);
}
.lib-chapter__aside a.is-h3 {
  padding-left: 1.4rem;
  font-size: 0.76rem;
}

/* 上一篇 / 下一篇 */
.lib-chapter-nav {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  font-size: 0.92rem;
}
.lib-chapter-nav a {
  flex: 1;
  padding: 1rem 1.2rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--ink-2);
  transition: all 0.15s ease;
}
.lib-chapter-nav a:hover {
  border-color: var(--accent);
  color: var(--ink);
}
.lib-chapter-nav small {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-3);
  margin-bottom: 0.3rem;
}

/* Archive / Index 列表 */
.lib-list { list-style: none; padding: 0; margin: 0; }
.lib-list li {
  padding: 1.2rem 0;
  border-bottom: 1px solid var(--border);
  display: grid;
  grid-template-columns: 110px 1fr auto;
  gap: 1.5rem;
  align-items: baseline;
}
.lib-list time {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--ink-3);
}
.lib-list a {
  font-weight: 600;
  color: var(--ink);
}
.lib-list a:hover { color: var(--accent); }
.lib-list .lib-list__desc {
  display: block;
  font-weight: 400;
  color: var(--ink-3);
  font-size: 0.88rem;
  margin-top: 0.2rem;
}
.lib-list .lib-list__num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
}
@media (max-width: 720px) {
  .lib-book { grid-template-columns: 1fr; padding: 1.5rem 1rem 3rem; }
  .lib-toc {
    position: static;
    max-height: none;
    padding-right: 0;
    padding: 1rem;
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 1.5rem;
  }
  .lib-chapter__aside { display: none; }
  .lib-list li { grid-template-columns: 1fr; gap: 0.3rem; }
}

/* 搜索模态 */
.lib-search-modal {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.45);
  display: none;
  align-items: flex-start;
  justify-content: center;
  z-index: 100;
  padding: 8vh 1rem 1rem;
}
.lib-search-modal.is-open { display: flex; }
.lib-search-modal__inner {
  width: 100%;
  max-width: 580px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.lib-search-input {
  width: 100%;
  padding: 1rem 1.2rem;
  border: none;
  background: transparent;
  color: var(--ink);
  font-family: var(--font-base);
  font-size: 1rem;
  border-bottom: 1px solid var(--border);
  outline: none;
}
.lib-search-input::placeholder { color: var(--ink-3); }
.lib-search-results { max-height: 50vh; overflow-y: auto; padding: 0.4rem; }
.lib-search-result {
  display: block;
  padding: 0.7rem 0.9rem;
  border-radius: var(--radius-sm);
  color: var(--ink);
}
.lib-search-result:hover, .lib-search-result:focus {
  background: var(--bg-soft);
  color: var(--ink);
}
.lib-search-result__title {
  font-weight: 600;
  font-size: 0.92rem;
  margin-bottom: 0.2rem;
}
.lib-search-result__excerpt {
  font-size: 0.82rem;
  color: var(--ink-3);
  line-height: 1.5;
}
.lib-search-result mark {
  background: var(--accent-soft);
  color: var(--accent);
  padding: 0 0.15em;
  border-radius: 2px;
}
.lib-search-empty {
  padding: 1.5rem;
  text-align: center;
  color: var(--ink-3);
  font-size: 0.9rem;
}