/* Tower 文档站 —— 编辑台式：奶油纸底 + 悬浮文档卡片 + 靛蓝强调 + 阅读进度 */

:root {
  --bg: #f4f1ea;
  --bg-2: #ece7dc;
  --card: #fffdf9;
  --ink: #1b1a17;
  --ink-soft: #6b6660;
  --line: #e5ded1;
  --line-soft: #efe9de;
  --accent: #4b45d6;
  --accent-2: #c2410c;
  --accent-soft: #ece9fb;
  --code-bg: #201d2c;
  --code-fg: #ece9f7;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --radius: 18px;
  --shadow: 0 1px 2px rgba(27, 26, 23, 0.04), 0 18px 40px -28px rgba(27, 26, 23, 0.5);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14131a;
    --bg-2: #191822;
    --card: #1b1a23;
    --ink: #ece9f2;
    --ink-soft: #a09cae;
    --line: #2c2a38;
    --line-soft: #26242f;
    --accent: #a9a4ff;
    --accent-2: #f59e6b;
    --accent-soft: #24223a;
    --code-bg: #100f16;
    --code-fg: #e7e4f2;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.35), 0 24px 48px -30px rgba(0, 0, 0, 0.9);
  }
}

html[data-theme='light'] {
  --bg: #f4f1ea;
  --bg-2: #ece7dc;
  --card: #fffdf9;
  --ink: #1b1a17;
  --ink-soft: #6b6660;
  --line: #e5ded1;
  --line-soft: #efe9de;
  --accent: #4b45d6;
  --accent-2: #c2410c;
  --accent-soft: #ece9fb;
  --code-bg: #201d2c;
  --code-fg: #ece9f7;
  --shadow: 0 1px 2px rgba(27, 26, 23, 0.04), 0 18px 40px -28px rgba(27, 26, 23, 0.5);
}

html[data-theme='dark'] {
  --bg: #14131a;
  --bg-2: #191822;
  --card: #1b1a23;
  --ink: #ece9f2;
  --ink-soft: #a09cae;
  --line: #2c2a38;
  --line-soft: #26242f;
  --accent: #a9a4ff;
  --accent-2: #f59e6b;
  --accent-soft: #24223a;
  --code-bg: #100f16;
  --code-fg: #e7e4f2;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.35), 0 24px 48px -30px rgba(0, 0, 0, 0.9);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(1200px 480px at 82% -12%, color-mix(in srgb, var(--accent-soft) 75%, transparent), transparent 70%),
    var(--bg);
  font: 15.5px/1.8 -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB',
    'Microsoft YaHei', sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

.skip-link { position: absolute; left: -9999px; }
.skip-link:focus { left: 12px; top: 12px; padding: 6px 12px; z-index: 200; background: var(--card); border-radius: 8px; }

/* 阅读进度 */
.progress {
  position: fixed; top: 0; left: 0; height: 3px; width: 0;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  z-index: 60; transition: width 0.1s linear;
}

/* ── 顶栏 ───────────────────────────────── */
.topbar {
  position: sticky; top: 0; z-index: 30;
  display: flex; align-items: center; gap: 14px;
  max-width: 1180px; margin: 0 auto;
  padding: 16px 26px 12px;
}
.brand { display: flex; align-items: center; gap: 11px; color: var(--ink); }
.brand img { border-radius: 10px; box-shadow: var(--shadow); }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; font-size: 16px; font-weight: 800; letter-spacing: -0.02em; }
.brand-text em { font-style: normal; font-size: 11px; font-weight: 500; color: var(--ink-soft); }

.pill {
  font: 11px/1 var(--mono); letter-spacing: 0.03em;
  padding: 6px 10px; border-radius: 999px;
  color: var(--accent); background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 22%, transparent);
}
.topbar-actions { margin-left: auto; display: flex; align-items: center; gap: 8px; }

.search-trigger, .icon-button {
  font: inherit; font-size: 13px; color: var(--ink-soft);
  background: var(--card); border: 1px solid var(--line);
  border-radius: 999px; padding: 7px 13px; cursor: pointer;
  box-shadow: 0 1px 1px rgba(27, 26, 23, 0.03);
}
.search-trigger:hover, .icon-button:hover { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 45%, var(--line)); }
.gh-link { font-size: 13px; color: var(--ink-soft); padding: 7px 4px; }
.gh-link:hover { color: var(--accent); }
.menu-button { display: none; }

/* ── 工作台布局 ─────────────────────────── */
.workbench {
  display: grid;
  grid-template-columns: 232px minmax(0, 1fr);
  gap: 22px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 6px 26px 70px;
  align-items: start;
}

/* 目录卡片 */
.menu {
  position: sticky; top: 78px;
  padding: 16px 14px;
  background: color-mix(in srgb, var(--card) 78%, transparent);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(6px);
  font-size: 13.5px;
}
.menu .nav-label {
  display: flex; align-items: center; gap: 7px;
  margin: 16px 0 7px; font: 10px/1.6 var(--mono); letter-spacing: 0.13em;
  text-transform: uppercase; color: var(--ink-soft);
}
.menu .nav-label:first-child { margin-top: 0; }
.menu .nav-label i { font-style: normal; color: var(--accent); font-size: 11px; }
.menu a {
  display: block; padding: 6px 11px; margin: 2px 0;
  border-radius: 999px; color: var(--ink-soft);
}
.menu a:hover { color: var(--ink); background: var(--line-soft); text-decoration: none; }
.menu a[aria-current='page'] {
  color: var(--accent); background: var(--accent-soft); font-weight: 600;
}

/* 正文卡片 */
.paper {
  min-width: 0;
  padding: 40px 46px 56px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.paper h1 {
  margin: 0 0 6px; font-size: 33px; line-height: 1.22;
  letter-spacing: -0.03em; font-weight: 800;
}
.paper h1 + p { margin-top: 10px; }
.paper h1::after {
  content: ''; display: block; width: 46px; height: 3px; margin: 18px 0 4px;
  border-radius: 2px; background: linear-gradient(90deg, var(--accent), var(--accent-2));
}
.paper h2 {
  display: inline-flex; align-items: center; gap: 8px;
  margin: 42px 0 12px; padding: 5px 13px 5px 11px;
  font-size: 16.5px; font-weight: 700; letter-spacing: -0.01em;
  color: var(--ink); background: var(--accent-soft);
  border-radius: 999px;
}
.paper h2::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }
.paper h3 { margin: 28px 0 8px; font-size: 15px; font-weight: 700; color: var(--accent-2); letter-spacing: 0.01em; }
.paper p { margin: 13px 0; }
.paper ul, .paper ol { margin: 13px 0; padding-left: 22px; }
.paper li { margin: 6px 0; }
.paper li::marker { color: var(--accent); }
.paper a { border-bottom: 1px solid color-mix(in srgb, var(--accent) 30%, transparent); }
.paper a:hover { text-decoration: none; border-bottom-color: var(--accent); }

.paper code {
  font: 0.86em/1.5 var(--mono); padding: 2px 6px; border-radius: 6px;
  background: var(--accent-soft); color: var(--accent);
}
.paper pre {
  margin: 18px 0; padding: 16px 18px; overflow-x: auto;
  background: var(--code-bg); color: var(--code-fg);
  border-radius: 12px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
}
.paper pre code {
  padding: 0; background: none; color: inherit; font-size: 13px;
  white-space: pre-wrap; overflow-wrap: anywhere;
}

.paper blockquote {
  margin: 20px 0; padding: 14px 16px;
  background: color-mix(in srgb, var(--accent-soft) 55%, transparent);
  border-radius: 12px;
  border: 1px solid color-mix(in srgb, var(--accent) 16%, transparent);
  font-size: 14.5px;
}
.paper blockquote p { margin: 0; }

.paper table { width: 100%; margin: 20px 0; border-collapse: collapse; font-size: 14px; }
.paper th {
  text-align: left; padding: 9px 12px;
  font: 11px/1.6 var(--mono); letter-spacing: 0.07em; text-transform: uppercase;
  color: var(--accent); border-bottom: 2px solid color-mix(in srgb, var(--accent) 30%, var(--line));
}
.paper td { padding: 10px 12px; border-bottom: 1px solid var(--line-soft); vertical-align: top; }
.paper td b { white-space: nowrap; }
.paper tr:hover td { background: color-mix(in srgb, var(--accent-soft) 40%, transparent); }

/* hero / 卡片 */
.hero { margin: 0 0 18px; }
.hero img { border-radius: 16px; padding: 8px; background: var(--bg-2); }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; margin: 24px 0 10px; }
.card {
  display: flex; flex-direction: column; gap: 5px;
  padding: 15px 16px; background: var(--bg-2);
  border: 1px solid var(--line-soft); border-radius: 14px;
  color: var(--ink); transition: transform 0.16s ease, box-shadow 0.16s ease;
}
.card strong { font-size: 14px; color: var(--accent); }
.card span { font-size: 12.5px; color: var(--ink-soft); line-height: 1.55; }
.card:hover { transform: translateY(-2px); box-shadow: var(--shadow); text-decoration: none; }

.page-footer {
  display: flex; flex-wrap: wrap; align-items: center; gap: 14px;
  margin-top: 52px; padding-top: 16px; border-top: 1px solid var(--line-soft);
  font-size: 12.5px; color: var(--ink-soft);
}
.page-footer a { color: var(--ink-soft); border-bottom: 0; }
.page-footer a:hover { color: var(--accent); }

/* ── 搜索 ───────────────────────────────── */
.search-overlay {
  position: fixed; inset: 0; z-index: 100;
  display: flex; flex-direction: column; align-items: center;
  padding: 13vh 18px 0;
  background: color-mix(in srgb, #1b1a17 40%, transparent);
  backdrop-filter: blur(4px);
}
.search-overlay[hidden] { display: none; }
.search-box {
  width: min(580px, 100%); display: flex; gap: 8px; align-items: center;
  padding: 11px 14px; background: var(--card);
  border: 1px solid var(--line); border-radius: 999px; box-shadow: var(--shadow);
}
#search-input { flex: 1; font: inherit; font-size: 15px; color: var(--ink); background: transparent; border: 0; outline: none; }
.search-results {
  width: min(580px, 100%); margin: 10px 0 0; padding: 8px; list-style: none;
  background: var(--card); border: 1px solid var(--line); border-radius: 16px;
  box-shadow: var(--shadow); max-height: 56vh; overflow: auto;
}
.search-results:empty { display: none; }
.search-results a { display: block; padding: 9px 12px; border-radius: 10px; color: var(--ink); font-size: 14px; border-bottom: 0; }
.search-results a small { display: block; font-size: 11.5px; color: var(--ink-soft); }
.search-results a:hover, .search-results a[data-active='true'] { background: var(--accent-soft); color: var(--accent); }

/* ── 响应式 ─────────────────────────────── */
@media (max-width: 980px) {
  .workbench { grid-template-columns: 1fr; padding: 4px 16px 50px; gap: 14px; }
  .menu { position: static; display: none; }
  .menu.open { display: block; }
  .menu-button { display: inline-flex; align-items: center; }
  .topbar { padding: 12px 16px 10px; }
  .pill { display: none; }
  .paper { padding: 24px 18px 40px; border-radius: 14px; }
  .paper h1 { font-size: 25px; }
  .paper table, .paper pre { font-size: 13px; }
}