/* Linux & Git 命令速查 —— 高级极简设计系统 */

:root {
  /* Background & Surface */
  --bg: #f6f8fb;
  --surface: #ffffff;
  --surface-raised: #ffffff;
  --surface-subtle: #f8fafc;

  /* Text */
  --ink: #0b1220;
  --ink-secondary: #475569;
  --ink-tertiary: #94a3b8;
  --ink-inverse: #ffffff;

  /* Brand */
  --brand: #2563eb;
  --brand-hover: #1d4ed8;
  --brand-soft: #eff6ff;
  --brand-soft-hover: #dbeafe;

  /* Group Accents */
  --linux: #0d9488;
  --linux-soft: #f0fdfa;
  --linux-tint: #ccfbf1;
  --git: #7c3aed;
  --git-soft: #f5f3ff;
  --git-tint: #ede9fe;

  /* Functional */
  --warn-bg: #fffbeb;
  --warn-line: #f59e0b;
  --warn-ink: #92400e;
  --info-bg: #eff6ff;
  --info-line: #3b82f6;
  --info-ink: #1e40af;
  --code-bg: #0d1526;
  --code-text: #e2e8f0;

  /* Lines */
  --line: #e6ebf1;
  --line-soft: #eef2f6;

  /* Shadows —— 柔和、多层、克制 */
  --shadow-xs: 0 1px 2px rgba(11, 18, 32, 0.04);
  --shadow-sm: 0 1px 2px rgba(11, 18, 32, 0.05), 0 2px 6px rgba(11, 18, 32, 0.04);
  --shadow: 0 4px 8px rgba(11, 18, 32, 0.04), 0 12px 24px rgba(11, 18, 32, 0.05);
  --shadow-hover: 0 8px 12px rgba(11, 18, 32, 0.05), 0 22px 44px rgba(11, 18, 32, 0.09);

  /* Radius */
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 22px;
  --radius-full: 9999px;

  /* Motion */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 150ms;
  --duration-base: 220ms;
  --duration-slow: 320ms;

  /* Layout */
  --sidebar-width: 264px;
  --content-max: 1240px;

  /* 8pt spacing */
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(1200px 480px at 100% -10%, rgba(37, 99, 235, 0.05), transparent 60%),
    radial-gradient(900px 420px at -10% 0%, rgba(124, 58, 237, 0.04), transparent 55%),
    var(--bg);
  background-attachment: fixed;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ---- Top bar (方案C：极简一体化工具栏) ---- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--line);
  padding: 10px 0;
}

.bar {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.brand-mini {
  flex-shrink: 0;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
}
.brand-mini .amp { color: var(--brand); margin: 0 1px; }

.search-wrap {
  position: relative;
  flex: 1;
  min-width: 0;
}

.search-icon {
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--ink-tertiary);
  pointer-events: none;
  display: flex;
  align-items: center;
}

#search {
  width: 100%;
  padding: 13px 18px 13px 48px;
  font-size: 15px;
  line-height: 1.4;
  border: 1px solid var(--line);
  border-radius: var(--radius-full);
  outline: none;
  background: var(--surface);
  color: var(--ink);
  box-shadow: var(--shadow-xs);
  transition: border-color var(--duration-fast) ease, box-shadow var(--duration-fast) ease;
}

#search::placeholder { color: var(--ink-tertiary); }
#search:hover { border-color: #cbd5e1; box-shadow: var(--shadow-sm); }
#search:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 4px var(--brand-soft), var(--shadow-sm);
}

.group-filters {
  flex-shrink: 0;
  display: inline-flex;
  gap: 4px;
  padding: 4px;
  background: var(--surface-subtle);
  border: 1px solid var(--line);
  border-radius: var(--radius-full);
}

.gbtn {
  border: none;
  background: transparent;
  color: var(--ink-secondary);
  padding: 7px 16px;
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
}
.gbtn:hover { color: var(--ink); background: rgba(11, 18, 32, 0.05); }
.gbtn.active { background: var(--surface); color: var(--brand); box-shadow: var(--shadow-xs); font-weight: 600; }

/* ---- Top bar actions (GitHub icon + theme toggle) ---- */
.topbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}
/* ---- GitHub 仓库链接 ---- */
.gh-brand {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px;
  border: 1px solid var(--line); background: var(--surface);
  border-radius: var(--radius); color: var(--ink);
  box-shadow: var(--shadow-xs);
  transition: color var(--duration-fast) var(--ease-out), border-color var(--duration-fast) var(--ease-out), box-shadow var(--duration-fast) var(--ease-out), transform var(--duration-fast) var(--ease-out);
}
.gh-brand:hover { border-color: #cbd5e1; box-shadow: var(--shadow-sm); transform: translateY(-1px); }
.gh-logo { color: var(--ink); }

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px; height: 38px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink-secondary);
  border-radius: var(--radius-full);
  cursor: pointer;
  box-shadow: var(--shadow-xs);
  transition: all var(--duration-fast) var(--ease-out);
}
.theme-toggle:hover { color: var(--ink); border-color: #cbd5e1; box-shadow: var(--shadow-sm); transform: translateY(-1px); }
.theme-toggle:active { transform: translateY(0) scale(0.96); }
/* 浅色模式显示月亮（点击切深色），深色模式显示太阳 */
.icon-sun { display: none; }
[data-theme="dark"] .icon-moon { display: none; }
[data-theme="dark"] .icon-sun { display: inline-flex; }

/* ---- Dark theme ---- */
[data-theme="dark"] {
  --bg: #0a0f1c;
  --surface: #131c2e;
  --surface-raised: #1a2438;
  --surface-subtle: #0f1830;
  --ink: #e6edf6;
  --ink-secondary: #a4b1c4;
  --ink-tertiary: #6b7a90;
  --ink-inverse: #0a0f1c;
  --brand: #60a5fa;
  --brand-hover: #93c5fd;
  --brand-soft: #14233f;
  --brand-soft-hover: #1d2f52;
  --linux: #2dd4bf;
  --linux-soft: #0e2b27;
  --linux-tint: #134e46;
  --git: #a78bfa;
  --git-soft: #1e1735;
  --git-tint: #2a2150;
  --warn-bg: #2a210b;
  --warn-line: #b47a16;
  --warn-ink: #f3c87a;
  --info-bg: #0f1d33;
  --info-line: #2f6bd0;
  --info-ink: #a9c8f5;
  --code-bg: #060c1a;
  --code-text: #cbd5e1;
  --line: #243049;
  --line-soft: #1b2438;
  --shadow-xs: 0 1px 2px rgba(0,0,0,0.35);
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.45), 0 2px 6px rgba(0,0,0,0.4);
  --shadow: 0 4px 8px rgba(0,0,0,0.45), 0 12px 24px rgba(0,0,0,0.5);
  --shadow-hover: 0 8px 12px rgba(0,0,0,0.5), 0 22px 44px rgba(0,0,0,0.55);
}
[data-theme="dark"] body {
  background:
    radial-gradient(1200px 480px at 100% -10%, rgba(96,165,250,0.10), transparent 60%),
    radial-gradient(900px 420px at -10% 0%, rgba(167,139,250,0.08), transparent 55%),
    var(--bg);
}
[data-theme="dark"] .topbar { background: rgba(10,15,28,0.82); border-bottom-color: var(--line); }
[data-theme="dark"] .hero { background: linear-gradient(135deg, #131c2e 0%, #0f1830 100%); }
[data-theme="dark"] .gbtn:hover { background: rgba(255,255,255,0.06); }
[data-theme="dark"] .cmd-card:hover { border-color: #2f3e57; }
[data-theme="dark"] #search:hover { border-color: #2f3e57; }
[data-theme="dark"] .badge.freq-高 { background: #3a1414; color: #fca5a5; border-color: #5c2222; }
[data-theme="dark"] .badge.freq-中 { background: #3a2c0a; color: #fcd34d; border-color: #5c451a; }
[data-theme="dark"] .badge.freq-低 { background: #1e2738; color: #94a3b8; border-color: #2f3e57; }
[data-theme="dark"] .badge.diff-入门 { background: #0e2b22; color: #6ee7b7; border-color: #14533f; }
[data-theme="dark"] .badge.diff-日常 { background: #14233f; color: #93c5fd; border-color: #1d2f52; }
[data-theme="dark"] .badge.diff-进阶 { background: #1e1735; color: #c4b5fd; border-color: #2a2150; }

/* ---- Layout ---- */
.layout {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  align-items: start;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--space-8) var(--space-6) 96px;
  gap: var(--space-8);
}

/* ---- Sidebar ---- */
.sidebar {
  position: sticky;
  top: 138px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  box-shadow: var(--shadow-sm);
  max-height: calc(100vh - 170px);
  overflow-y: auto;
}

.side-group-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-tertiary);
  padding: 12px 10px 8px;
  margin-top: 6px;
}
.side-group-title:first-child { margin-top: 0; }
.side-group-title.linux { color: var(--linux); }
.side-group-title.git { color: var(--git); }
.side-group-title .dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: currentColor; opacity: 0.7;
}

.side-cat {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  border: none;
  background: transparent;
  text-align: left;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  font-weight: 500;
  color: var(--ink-secondary);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
}
.side-cat:hover { background: var(--surface-subtle); color: var(--ink); }
.side-cat.active { background: var(--brand-soft); color: var(--brand); font-weight: 600; }
.side-cat .cnt {
  font-size: 11px;
  font-weight: 600;
  color: var(--ink-tertiary);
  background: var(--surface-subtle);
  border-radius: var(--radius-full);
  padding: 2px 9px;
  transition: all var(--duration-fast) ease;
}
.side-cat:hover .cnt, .side-cat.active .cnt { background: rgba(37, 99, 235, 0.12); color: var(--brand); }

/* ---- Content ---- */
.content { min-width: 0; }

.stat-bar {
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-tertiary);
  margin-bottom: var(--space-5);
  display: flex;
  align-items: center;
  gap: 8px;
}
.stat-bar strong { color: var(--ink); font-weight: 600; }

/* ---- Hero ---- */
.hero {
  background: linear-gradient(135deg, #ffffff 0%, #f5f8ff 100%);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  padding: var(--space-5) var(--space-6);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--space-10);
}
.hero .chips { margin-top: 0; }

.chips {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: var(--space-6);
}
.chip-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-tertiary);
  margin-left: 4px;
}
.chip {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink-secondary);
  padding: 7px 16px;
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
}
.chip:hover { border-color: #cbd5e1; color: var(--ink); box-shadow: var(--shadow-xs); }
.chip.active { background: var(--brand); border-color: var(--brand); color: #fff; box-shadow: var(--shadow-sm); }
.chip-clear { color: var(--ink-tertiary); font-size: 12px; padding: 7px 14px; }

/* ---- Category section ---- */
.cat-section { margin-bottom: var(--space-10); }
.cat-section-head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding-bottom: var(--space-3);
  margin-bottom: var(--space-5);
  border-bottom: 1px solid var(--line);
}
.cat-section-head h3 {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.cat-section-dot { width: 8px; height: 8px; border-radius: 50%; align-self: center; }
.cat-section-dot.linux { background: var(--linux); }
.cat-section-dot.git { background: var(--git); }
.cat-section-count {
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-tertiary);
  background: var(--surface-subtle);
  border-radius: var(--radius-full);
  padding: 2px 10px;
}

/* ---- Category header (single) ---- */
.cat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--line);
}
.cat-header h2 { margin: 6px 0 0; font-size: 24px; font-weight: 700; letter-spacing: -0.02em; color: var(--ink); }
.cat-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: var(--radius-full);
}
.cat-badge.linux { background: var(--linux-soft); color: var(--linux); }
.cat-badge.git { background: var(--git-soft); color: var(--git); }
.cat-meta { font-size: 13px; font-weight: 600; color: var(--ink-tertiary); }

/* ---- Cards ---- */
.cmd-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-5);
}
.cmd-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: var(--space-5);
  cursor: pointer;
  box-shadow: var(--shadow-xs);
  overflow: hidden;
  transition: border-color var(--duration-fast) ease, box-shadow var(--duration-base) var(--ease-out), transform var(--duration-base) var(--ease-out);
  opacity: 0;
  transform: translateY(12px);
  animation: cardEnter var(--duration-slow) var(--ease-out) forwards;
}
.cmd-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--brand);
  opacity: 0;
  transition: opacity var(--duration-fast) ease;
}
.cmd-card.linux::before { background: var(--linux); }
.cmd-card.git::before { background: var(--git); }
.cmd-card:hover {
  border-color: #cbd5e1;
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}
.cmd-card:hover::before { opacity: 1; }
.cmd-card:active { transform: translateY(-1px) scale(0.995); transition-duration: 80ms; }

.cmd-card-top { display: flex; justify-content: flex-end; margin-bottom: 6px; }
.cmd-group-tag {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 3px 8px;
  border-radius: var(--radius-full);
}
.cmd-group-tag.linux { background: var(--linux-soft); color: var(--linux); }
.cmd-group-tag.git { background: var(--git-soft); color: var(--git); }

.cmd-card .name {
  font-family: "Fira Code", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.01em;
  line-height: 1.3;
}
.cmd-card .desc {
  font-size: 13.5px;
  color: var(--ink-secondary);
  margin-top: 8px;
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.badges { margin-top: var(--space-4); display: flex; gap: 8px; flex-wrap: wrap; }

.badge {
  font-size: 11px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  letter-spacing: 0.02em;
}
.badge.freq-高 { background: #fef2f2; color: #dc2626; border-color: #fecaca; }
.badge.freq-中 { background: #fffbeb; color: #d97706; border-color: #fde68a; }
.badge.freq-低 { background: #f1f5f9; color: #64748b; border-color: #e2e8f0; }
.badge.diff-入门 { background: #ecfdf5; color: #059669; border-color: #a7f3d0; }
.badge.diff-日常 { background: #eff6ff; color: #2563eb; border-color: #bfdbfe; }
.badge.diff-进阶 { background: #f5f3ff; color: #7c3aed; border-color: #ddd6fe; }

@keyframes cardEnter { to { opacity: 1; transform: translateY(0); } }

/* ---- Detail ---- */
.detail {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: var(--space-8) var(--space-10);
  box-shadow: var(--shadow);
  animation: cardEnter var(--duration-slow) var(--ease-out);
}
.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink-secondary);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  margin-bottom: var(--space-5);
  transition: all var(--duration-fast) var(--ease-out);
}
.back-btn:hover { border-color: #cbd5e1; background: var(--surface-subtle); color: var(--ink); }

.detail-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
}
.detail-title-wrap { display: flex; flex-direction: column; gap: 8px; }
.detail-title-wrap h2 {
  font-family: "Fira Code", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: clamp(26px, 4vw, 36px);
  font-weight: 700;
  margin: 0;
  color: var(--ink);
  letter-spacing: -0.02em;
}
.detail .cat-line { color: var(--ink-tertiary); font-size: 14px; font-weight: 500; }
.copy-cmd-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  flex-shrink: 0;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink-secondary);
  padding: 9px 16px;
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
}
.copy-cmd-btn:hover { border-color: var(--brand); color: var(--brand); background: var(--brand-soft); }
.copy-cmd-btn.done { color: #059669; border-color: #a7f3d0; background: #ecfdf5; }

.detail .lead {
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink-secondary);
  margin: var(--space-4) 0 var(--space-5);
}

.section-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-tertiary);
  margin: var(--space-8) 0 var(--space-4);
}
.ex-list { display: flex; flex-direction: column; gap: var(--space-3); }
.ex-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
  transition: box-shadow var(--duration-fast) ease;
}
.ex-item:hover { box-shadow: var(--shadow-sm); }
.ex-cmd-row {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--code-bg);
  padding: 12px 14px;
  border-left: 3px solid var(--brand);
}
.ex-cmd {
  font-family: "Fira Code", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  color: var(--code-text);
  font-size: 14px;
  flex: 1;
  word-break: break-all;
  line-height: 1.5;
}
.copy-btn {
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.1);
  color: #cbd5e1;
  border-radius: var(--radius-sm);
  padding: 5px 12px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--duration-fast) ease;
}
.copy-btn:hover { background: rgba(255, 255, 255, 0.18); color: #fff; border-color: rgba(255, 255, 255, 0.3); }
.copy-btn.done { color: #86efac; border-color: rgba(74, 222, 128, 0.5); background: rgba(74, 222, 128, 0.12); }
.ex-desc { padding: 10px 14px; font-size: 14px; color: var(--ink-secondary); background: var(--surface-subtle); }

/* 执行示例与输出解释 */
.sample-block { display: flex; flex-direction: column; gap: var(--space-4); }
.sample-term {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--code-bg);
  box-shadow: var(--shadow-sm);
}
.sample-term-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 9px 14px;
  background: rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.sample-term-bar .dot { width: 11px; height: 11px; border-radius: 50%; display: inline-block; }
.sample-term-bar .dot.r { background: #ff5f56; }
.sample-term-bar .dot.y { background: #ffbd2e; }
.sample-term-bar .dot.g { background: #27c93f; }
.sample-term-title {
  margin-left: 8px;
  font-family: "Fira Code", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 12px;
  color: rgba(226, 232, 240, 0.55);
  letter-spacing: 0.04em;
}
.sample-output {
  margin: 0;
  padding: 16px 18px;
  font-family: "Fira Code", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--code-text);
  white-space: pre-wrap;
  word-break: break-word;
  overflow-x: auto;
}
.sample-output .prompt { color: #34d399; font-weight: 700; }
.sample-output .cmd-line { color: #f8fafc; }
.sample-output .out-line { color: var(--code-text); }
.sample-explain {
  border: 1px solid var(--line);
  border-left: 3px solid var(--brand);
  border-radius: var(--radius);
  padding: 14px 18px;
  background: var(--surface);
}
.sample-explain-head {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--brand);
  margin-bottom: 8px;
}
.sample-explain p {
  margin: 0 0 10px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-secondary);
}
.sample-explain p:last-child { margin-bottom: 0; }

/* 选项速查表 */
.opt-table {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
}
.opt-row {
  display: grid;
  grid-template-columns: minmax(180px, 1.1fr) 96px 2.4fr;
  gap: 14px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  align-items: start;
}
.opt-row:last-child { border-bottom: none; }
.opt-head {
  background: var(--surface-subtle);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ink-tertiary);
}
.opt-flag { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.opt-flag code {
  font-family: "Fira Code", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 13px;
  color: var(--code-text);
  background: var(--code-bg);
  padding: 3px 7px;
  border-radius: var(--radius-sm);
  word-break: break-all;
  line-height: 1.5;
}
.opt-default { display: flex; align-items: flex-start; }
.opt-default-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--brand);
  background: var(--brand-soft);
  border-radius: var(--radius-sm);
  padding: 3px 8px;
  white-space: nowrap;
}
.opt-desc {
  font-size: 13.5px;
  color: var(--ink-secondary);
  line-height: 1.65;
}
.opt-copy {
  padding: 3px 9px;
  font-size: 11px;
  border-color: var(--line);
  background: var(--surface-subtle);
  color: var(--ink-secondary);
}
.opt-copy:hover { background: var(--brand-soft); color: var(--brand); border-color: var(--brand-soft-hover); }
.opt-copy.done { color: #15803d; border-color: rgba(34, 197, 94, 0.4); background: rgba(34, 197, 94, 0.12); }

.note-box {
  border-radius: var(--radius);
  padding: 14px 16px;
  font-size: 14px;
  line-height: 1.6;
  display: flex;
  gap: 12px;
  align-items: flex-start;
}
.note-box b {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px; height: 22px;
  border-radius: 50%;
  font-size: 13px;
}
.note-box.warn { background: var(--warn-bg); border: 1px solid #fde68a; color: var(--warn-ink); }
.note-box.warn b { background: #f59e0b; color: #fff; }
.note-box.info { background: var(--info-bg); border: 1px solid #bfdbfe; color: var(--info-ink); }
.note-box.info b { background: #3b82f6; color: #fff; }

.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 6px; }
.tag {
  font-size: 12px;
  font-weight: 500;
  background: var(--surface-subtle);
  border: 1px solid var(--line);
  border-radius: var(--radius-full);
  padding: 4px 12px;
  color: var(--ink-secondary);
  transition: all var(--duration-fast) ease;
}
.tag:hover { background: var(--brand-soft); border-color: var(--brand-soft-hover); color: var(--brand); }

/* ---- Empty / Misc ---- */
.empty {
  text-align: center;
  color: var(--ink-tertiary);
  padding: 80px var(--space-4);
  font-size: 15px;
  background: var(--surface);
  border: 1px dashed var(--line);
  border-radius: var(--radius-lg);
}
mark { background: #fef08a; color: var(--ink); padding: 0 2px; border-radius: 3px; font-weight: 600; }

/* ---- Responsive ---- */
@media (max-width: 940px) {
  .layout { grid-template-columns: 1fr; padding-top: var(--space-6); gap: var(--space-6); }
  .sidebar {
    position: static;
    max-height: none;
    display: flex;
    flex-wrap: nowrap;
    gap: 8px;
    overflow-x: auto;
    padding: var(--space-3);
  }
  .side-group-title { display: none; }
  .side-cat { flex: 0 0 auto; width: auto; }
  .side-cat .cnt { display: none; }
}
/* 方案C：窄屏时工具栏换行，搜索框与分组各占一行 */
@media (max-width: 760px) {
  .bar { flex-wrap: wrap; gap: var(--space-3); }
  .topbar-actions { margin-left: auto; }
  .search-wrap { order: 3; flex-basis: 100%; }
  .group-filters { order: 4; flex-basis: 100%; justify-content: center; }
  .brand-mini { font-size: 16px; }
}
@media (max-width: 640px) {
  .bar { padding: 0 var(--space-4); gap: var(--space-3); }
  .topbar-actions { gap: 8px; }
  .layout { padding: var(--space-5) var(--space-4) 72px; }
  .hero { padding: var(--space-5) var(--space-4); border-radius: var(--radius-lg); }
  .cmd-grid { grid-template-columns: 1fr; }
  .detail { padding: var(--space-6) var(--space-5); border-radius: var(--radius); }
  .detail-head { flex-direction: column; }
  .opt-row { grid-template-columns: 1fr; gap: 6px; }
  .opt-head { display: none; }
  .opt-flag { font-weight: 600; }
}

/* ============================================================
   新增：顶部 Tab 导航 / 熟练度检测 / AI 模拟面试 / 设置弹窗
   ============================================================ */

/* ---- 顶部 Tab 导航 ---- */
.tabbar {
  display: flex;
  justify-content: center;
  padding: 0 var(--space-6);
  border-top: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.6);
}
.tabseg {
  display: inline-flex;
  gap: 4px;
  padding: 6px;
  margin: 8px 0;
  background: var(--surface-subtle);
  border: 1px solid var(--line);
  border-radius: var(--radius-full);
}
.tab {
  border: none;
  background: transparent;
  color: var(--ink-secondary);
  padding: 8px 20px;
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  white-space: nowrap;
}
.tab:hover { color: var(--ink); background: rgba(11, 18, 32, 0.05); }
.tab.active { background: var(--surface); color: var(--brand); box-shadow: var(--shadow-xs); }

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px; height: 38px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink-secondary);
  border-radius: var(--radius-full);
  cursor: pointer;
  box-shadow: var(--shadow-xs);
  transition: all var(--duration-fast) var(--ease-out);
}
.icon-btn:hover { color: var(--ink); border-color: #cbd5e1; box-shadow: var(--shadow-sm); transform: translateY(-1px); }

/* 视图切换：非速查时隐藏速查专属控件与侧栏 */
body[data-tab="quiz"] [data-tab-only="lookup"],
body[data-tab="interview"] [data-tab-only="lookup"],
body[data-tab="explain"] [data-tab-only="lookup"],
body[data-tab="generate"] [data-tab-only="lookup"] { display: none; }
body[data-tab="quiz"] .sidebar,
body[data-tab="interview"] .sidebar,
body[data-tab="explain"] .sidebar,
body[data-tab="generate"] .sidebar { display: none; }
body[data-tab="quiz"] .layout,
body[data-tab="interview"] .layout,
body[data-tab="explain"] .layout,
body[data-tab="generate"] .layout { grid-template-columns: 1fr; }

/* ---- 模块通用（检测 / 面试） ---- */
.mod-home { max-width: 760px; margin: 0 auto; }
.mod-head h2 { font-size: 26px; font-weight: 700; letter-spacing: -0.02em; margin: 0 0 8px; color: var(--ink); }
.mod-head p { color: var(--ink-secondary); font-size: 15px; line-height: 1.6; margin: 0 0 var(--space-6); }
.grp-pick { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }
.grp-pick-btn {
  display: flex; flex-direction: column; gap: 4px; text-align: left;
  border: 1px solid var(--line); background: var(--surface); border-radius: var(--radius);
  padding: var(--space-5); cursor: pointer; box-shadow: var(--shadow-xs);
  transition: all var(--duration-fast) var(--ease-out);
}
.grp-pick-btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.grp-pick-btn.linux { border-top: 3px solid var(--linux); }
.grp-pick-btn.git { border-top: 3px solid var(--git); }
.gp-title { font-size: 16px; font-weight: 700; color: var(--ink); }
.gp-sub { font-size: 13px; color: var(--ink-tertiary); }
.mod-note { margin-top: var(--space-5); font-size: 13px; color: var(--ink-tertiary); background: var(--surface-subtle); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 14px; line-height: 1.5; }
.mod-note.ok { color: var(--linux); border-color: var(--linux-tint); background: var(--linux-soft); }
.mod-note.warn { color: var(--warn-ink); border-color: #fde68a; background: var(--warn-bg); }

/* ---- 按钮 ---- */
.btn-primary { border: 1px solid var(--brand); background: var(--brand); color: #fff; padding: 10px 20px; border-radius: var(--radius-full); font-size: 14px; font-weight: 600; cursor: pointer; transition: all var(--duration-fast) var(--ease-out); }
.btn-primary:hover { background: var(--brand-hover); }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; }
.btn-ghost { border: 1px solid var(--line); background: var(--surface); color: var(--ink-secondary); padding: 10px 18px; border-radius: var(--radius-full); font-size: 14px; font-weight: 500; cursor: pointer; transition: all var(--duration-fast) var(--ease-out); }
.btn-ghost:hover { border-color: #cbd5e1; color: var(--ink); }
.btn-ghost.sm { padding: 6px 14px; font-size: 13px; }

/* ---- 指令含义查询 ---- */
.explain { max-width: 880px; margin: 0 auto; }
.explain-head h2 { font-size: 26px; font-weight: 700; letter-spacing: -0.02em; margin: 0 0 8px; color: var(--ink); }
.explain-head p { color: var(--ink-secondary); font-size: 15px; line-height: 1.6; margin: 0 0 var(--space-6); }
.explain-head code { font-family: "Fira Code", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace; background: var(--surface-subtle); border: 1px solid var(--line); border-radius: 6px; padding: 1px 6px; font-size: 13px; color: var(--brand); }
.explain-bar { display: flex; gap: 12px; align-items: stretch; margin-bottom: var(--space-6); }
/* 模块内 Linux/Git 切换分段控件（与顶栏 Tab 风格一致） */
.grp-seg {
  display: inline-flex;
  gap: 4px;
  padding: 5px;
  margin: 0 0 var(--space-5);
  background: var(--surface-subtle);
  border: 1px solid var(--line);
  border-radius: var(--radius-full);
}
.seg-btn {
  border: none;
  background: transparent;
  color: var(--ink-secondary);
  padding: 7px 18px;
  border-radius: var(--radius-full);
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  white-space: nowrap;
}
.seg-btn:hover { color: var(--ink); background: rgba(11, 18, 32, 0.05); }
.seg-btn.on { background: var(--surface); color: var(--brand); box-shadow: var(--shadow-xs); }
.explain-field { position: relative; flex: 1; min-width: 0; }
.explain-input {
  width: 100%;
  padding: 14px 18px;
  font-size: 15px;
  line-height: 1.4;
  font-family: "Fira Code", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  border: 1px solid var(--line);
  border-radius: var(--radius-full);
  outline: none;
  background: var(--surface);
  color: var(--ink);
  box-shadow: var(--shadow-xs);
  transition: border-color var(--duration-fast) ease, box-shadow var(--duration-fast) ease;
}
.explain-input::placeholder { color: var(--ink-tertiary); font-family: inherit; }
.explain-input:hover { border-color: #cbd5e1; box-shadow: var(--shadow-sm); }
.explain-input:focus { border-color: var(--brand); box-shadow: 0 0 0 3px var(--brand-soft); }
.explain-result { margin-top: var(--space-2); }
.explain-hint, .explain-sub { color: var(--ink-tertiary); font-size: 14px; line-height: 1.6; }
.explain-notfound .section-title { margin-top: 0; }
.explain-notfound .explain-sub { margin: 0 0 var(--space-4); }
.ex-args { display: flex; flex-direction: column; gap: var(--space-3); }
.arg-row { display: flex; gap: 12px; align-items: flex-start; border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 14px; background: var(--surface); }
.arg-tok { flex-shrink: 0; font-family: "Fira Code", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace; font-weight: 600; color: var(--brand); background: var(--brand-soft); border: 1px solid var(--brand-soft-hover); border-radius: 6px; padding: 2px 8px; font-size: 13px; }
.arg-mean { font-size: 14px; line-height: 1.6; color: var(--ink-secondary); }
.arg-mean code { font-family: "Fira Code", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace; background: var(--surface-subtle); border: 1px solid var(--line); border-radius: 5px; padding: 1px 5px; font-size: 12px; color: var(--ink); }
@media (max-width: 640px) {
  .explain-bar { flex-direction: column; }
  .explain-head h2 { font-size: 22px; }
}

/* ---- 任务 → 指令生成 ---- */
.generate { max-width: 880px; margin: 0 auto; }
.generate-head h2 { font-size: 26px; font-weight: 700; letter-spacing: -0.02em; margin: 0 0 8px; color: var(--ink); }
.generate-head p { color: var(--ink-secondary); font-size: 15px; line-height: 1.6; margin: 0 0 var(--space-6); }
.generate-head code { font-family: "Fira Code", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace; background: var(--surface-subtle); border: 1px solid var(--line); border-radius: 6px; padding: 1px 6px; font-size: 13px; color: var(--brand); }
.generate-bar { display: flex; gap: 12px; align-items: stretch; margin-bottom: var(--space-4); }
.generate-field { position: relative; flex: 1; min-width: 0; }
.generate-input {
  width: 100%; height: 48px; padding: 0 16px;
  border: 1px solid var(--line); border-radius: var(--radius-full);
  background: var(--surface); color: var(--ink);
  font-size: 15px; font-family: inherit;
  box-shadow: var(--shadow-xs);
  transition: border-color var(--duration-fast) var(--ease-out), box-shadow var(--duration-fast) var(--ease-out);
}
.generate-input::placeholder { color: var(--ink-tertiary); font-family: inherit; }
.generate-input:hover { border-color: #cbd5e1; box-shadow: var(--shadow-sm); }
.generate-input:focus { border-color: var(--brand); box-shadow: 0 0 0 3px var(--brand-soft); outline: none; }
.gen-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: var(--space-6); }
.gen-chip {
  border: 1px solid var(--line); background: var(--surface);
  color: var(--ink-secondary); border-radius: var(--radius-full);
  padding: 6px 14px; font-size: 13px; cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
}
.gen-chip:hover { border-color: var(--brand); color: var(--brand); background: var(--brand-soft); }
.generate-result { margin-top: var(--space-2); }
.generate-hint, .gen-sub { color: var(--ink-tertiary); font-size: 14px; line-height: 1.6; }
.gen-summary { font-size: 14px; color: var(--ink-secondary); margin: 0 0 var(--space-4); }
.gen-summary b { color: var(--ink); }
.gen-card {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--surface); padding: var(--space-5);
  margin-bottom: var(--space-4); box-shadow: var(--shadow-xs);
}
.gen-card.top { border-color: var(--brand-soft-hover); box-shadow: 0 0 0 3px var(--brand-soft); }
.gen-card-head { display: flex; align-items: center; gap: 10px; margin-bottom: var(--space-3); }
.gen-rank { font-size: 14px; font-weight: 800; color: var(--ink-tertiary); font-variant-numeric: tabular-nums; }
.gen-card.top .gen-rank { color: var(--brand); }
.gen-name { font-size: 18px; font-weight: 700; color: var(--ink); font-family: "Fira Code", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace; }
.gen-card-head .copy-cmd-btn { margin-left: auto; }
.gen-detail-btn {
  border: none; background: none; color: var(--brand); cursor: pointer;
  font-size: 13px; font-weight: 600; padding: 0; font-family: inherit;
}
.gen-detail-btn:hover { text-decoration: underline; }
.gen-reco { margin-top: var(--space-4); padding: var(--space-4); background: var(--surface-subtle); border: 1px solid var(--line); border-radius: var(--radius); }
.gen-reco-label { font-size: 12px; font-weight: 700; color: var(--ink-tertiary); text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: 8px; }
.gen-cmd-row { display: flex; align-items: center; gap: 10px; }
.gen-cmd { flex: 1; font-family: "Fira Code", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace; font-size: 15px; color: var(--ink); background: var(--surface); border: 1px solid var(--line); border-radius: 6px; padding: 8px 12px; overflow-x: auto; white-space: nowrap; }
.gen-examples { margin-top: var(--space-4); }
.gen-ex-label { font-size: 12px; font-weight: 700; color: var(--ink-tertiary); text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: 8px; }
.gen-ex-item { display: flex; gap: 10px; align-items: baseline; padding: 6px 0; border-top: 1px dashed var(--line); }
.gen-ex-item:first-child { border-top: none; }
.gen-ex-cmd { flex-shrink: 0; font-family: "Fira Code", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace; font-size: 13px; color: var(--brand); background: var(--brand-soft); border: 1px solid var(--brand-soft-hover); border-radius: 5px; padding: 2px 7px; }
.gen-ex-desc { font-size: 13px; color: var(--ink-secondary); }
@media (max-width: 640px) {
  .generate-bar { flex-direction: column; }
  .generate-head h2 { font-size: 22px; }
}

/* ---- 熟练度检测 ---- */
/* A 自测清单 */
.self-summary { display: flex; align-items: center; gap: var(--space-5); margin-bottom: var(--space-5); padding: var(--space-4) var(--space-5); background: var(--surface-subtle); border: 1px solid var(--line); border-radius: var(--radius); flex-wrap: wrap; }
.self-ring { font-size: 26px; font-weight: 800; color: var(--brand); font-variant-numeric: tabular-nums; }
.self-ring small { font-size: 13px; color: var(--ink-tertiary); font-weight: 600; margin-left: 4px; }
.self-meta { font-size: 13px; color: var(--ink-secondary); line-height: 1.5; }
.self-actions { margin-left: auto; display: flex; gap: 10px; }
.self-cat { margin-bottom: var(--space-4); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.self-cat-head { display: flex; align-items: center; gap: 10px; padding: 10px 14px; background: var(--surface-subtle); border-bottom: 1px solid var(--line); }
.self-cat-head h4 { margin: 0; font-size: 14px; font-weight: 700; color: var(--ink); }
.self-cat-head .cat-count { font-size: 12px; color: var(--ink-tertiary); }
.self-cat-head .cat-quick { margin-left: auto; display: flex; gap: 8px; }
.mini-btn { border: 1px solid var(--line); background: var(--surface); color: var(--ink-secondary); padding: 4px 10px; border-radius: var(--radius-full); font-size: 12px; cursor: pointer; transition: all var(--duration-fast) var(--ease-out); }
.mini-btn:hover { border-color: #cbd5e1; color: var(--ink); }
.self-row { display: flex; align-items: center; gap: 12px; padding: 9px 14px; border-bottom: 1px solid var(--line); }
.self-row:last-child { border-bottom: none; }
.self-cmd { flex: 1; min-width: 0; }
.self-cmd code { font-family: "Fira Code", monospace; font-size: 14px; font-weight: 600; color: var(--git); }
.self-cmd span { display: block; font-size: 12px; color: var(--ink-tertiary); margin-top: 2px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.mk-btns { display: inline-flex; gap: 6px; flex-shrink: 0; }
.mk-btn { border: 1px solid var(--line); background: var(--surface); color: var(--ink-secondary); padding: 6px 11px; border-radius: var(--radius-full); font-size: 13px; cursor: pointer; transition: all var(--duration-fast) var(--ease-out); white-space: nowrap; }
.mk-btn:hover { border-color: #cbd5e1; color: var(--ink); }
.mk-btn.on-known { background: #ecfdf5; border-color: #a7f3d0; color: #047857; }
.mk-btn.on-fuzzy { background: #fffbeb; border-color: #fde68a; color: #b45309; }
.mk-btn.on-unknown { background: #fef2f2; border-color: #fecaca; color: #b91c1c; }
/* 模块子标签 + 返回栏 */
.prof-bar { display: flex; align-items: center; gap: 12px; margin-bottom: var(--space-4); flex-wrap: wrap; }
.prof-back { border: 1px solid var(--line); background: var(--surface); color: var(--ink-secondary); padding: 7px 14px; border-radius: var(--radius-full); font-size: 13px; font-weight: 500; cursor: pointer; transition: all var(--duration-fast) var(--ease-out); }
.prof-back:hover { border-color: #cbd5e1; color: var(--ink); }
.prof-tag { font-size: 13px; color: var(--ink-tertiary); }
.prof-subtabs { display: inline-flex; gap: 4px; padding: 4px; background: var(--surface-subtle); border: 1px solid var(--line); border-radius: var(--radius-full); margin-bottom: var(--space-5); }
.subtab { border: none; background: transparent; padding: 8px 18px; border-radius: var(--radius-full); font-size: 14px; font-weight: 600; color: var(--ink-secondary); cursor: pointer; transition: all var(--duration-fast) var(--ease-out); }
.subtab.active { background: var(--surface); color: var(--ink); box-shadow: var(--shadow-xs); }
/* B 实战任务 */
.practice-q { max-width: 720px; margin: 0 auto; }
.practice-progress { font-size: 13px; color: var(--ink-tertiary); margin-bottom: var(--space-4); font-weight: 500; }
.practice-scenario { font-size: 18px; line-height: 1.6; color: var(--ink); margin-bottom: var(--space-4); font-weight: 500; }
.practice-scenario b { color: var(--brand); }
.practice-input { width: 100%; box-sizing: border-box; font-family: "Fira Code", monospace; font-size: 15px; padding: 12px 14px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); color: var(--ink); outline: none; }
.practice-input:focus { border-color: var(--brand); box-shadow: 0 0 0 4px var(--brand-soft); }
.practice-foot { display: flex; align-items: center; gap: 12px; margin-top: var(--space-4); }
.practice-feedback { margin-top: var(--space-4); padding: 12px 14px; border-radius: var(--radius); font-size: 14px; line-height: 1.6; }
.practice-feedback.ok { background: #ecfdf5; border: 1px solid #a7f3d0; color: #047857; }
.practice-feedback.bad { background: #fef2f2; border: 1px solid #fecaca; color: #b91c1c; }
.practice-feedback code { font-family: "Fira Code", monospace; font-weight: 700; }
.practice-hint { font-size: 13px; color: var(--ink-tertiary); margin-top: 8px; }
.practice-hint code { color: var(--git); }

.quiz-report { max-width: 720px; margin: 0 auto; }
.rep-head { display: flex; align-items: center; gap: var(--space-6); margin-bottom: var(--space-6); flex-wrap: wrap; }
.rep-level { font-size: 26px; font-weight: 700; color: var(--brand); background: var(--brand-soft); border: 1px solid var(--brand-soft-hover); border-radius: var(--radius-lg); padding: 16px 24px; }
.rep-score { font-size: 15px; color: var(--ink-secondary); }
.rep-score b { font-size: 30px; color: var(--ink); }
.rep-sub { font-size: 13px; color: var(--ink-tertiary); }
.rep-section { margin-bottom: var(--space-6); }
.rep-section h4 { font-size: 14px; font-weight: 700; color: var(--ink); margin: 0 0 12px; }
.cat-bar { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }
.cb-name { width: 120px; font-size: 13px; color: var(--ink-secondary); flex-shrink: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cb-track { flex: 1; height: 8px; background: var(--surface-subtle); border-radius: var(--radius-full); overflow: hidden; }
.cb-fill { display: block; height: 100%; background: var(--brand); border-radius: var(--radius-full); }
.cb-pct { width: 44px; text-align: right; font-size: 13px; font-weight: 600; color: var(--ink-secondary); }
.weak-item { display: flex; gap: 12px; align-items: baseline; padding: 10px 12px; border: 1px solid var(--line); border-radius: var(--radius); margin-bottom: 8px; }
.weak-item code { font-family: "Fira Code", monospace; color: var(--git); font-weight: 600; flex-shrink: 0; }
.weak-item span { font-size: 13px; color: var(--ink-secondary); }
.weak-none { font-size: 14px; color: var(--linux); }
.rep-actions { display: flex; gap: 12px; margin-top: var(--space-6); }

/* ---- AI 模拟面试 ---- */
.iv-wrap { max-width: 820px; margin: 0 auto; display: flex; flex-direction: column; height: calc(100vh - 220px); min-height: 420px; }
.iv-bar { display: flex; align-items: center; gap: 12px; padding-bottom: var(--space-3); border-bottom: 1px solid var(--line); margin-bottom: var(--space-4); }
.iv-dir { font-size: 15px; font-weight: 700; color: var(--ink); }
.iv-bar .btn-ghost.sm:first-of-type { margin-left: auto; }
.iv-chat { flex: 1; overflow-y: auto; display: flex; flex-direction: column; gap: 14px; padding: var(--space-2); }
.iv-msg { display: flex; }
.iv-msg.user { justify-content: flex-end; }
.iv-bubble { max-width: 80%; padding: 12px 16px; border-radius: var(--radius); font-size: 15px; line-height: 1.6; white-space: pre-wrap; word-break: break-word; }
.iv-msg.user .iv-bubble { background: var(--brand); color: #fff; border-bottom-right-radius: 4px; }
.iv-msg.bot .iv-bubble { background: var(--surface); border: 1px solid var(--line); color: var(--ink); border-bottom-left-radius: 4px; }
.iv-inputbar { display: flex; gap: 10px; padding-top: var(--space-3); }
.iv-inputbar textarea { flex: 1; resize: none; border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 14px; font-size: 15px; font-family: inherit; color: var(--ink); background: var(--surface); outline: none; max-height: 140px; }
.iv-inputbar textarea:focus { border-color: var(--brand); box-shadow: 0 0 0 4px var(--brand-soft); }
.iv-report-bubble.report { background: var(--surface-subtle); border-color: var(--brand-soft-hover); }

/* ---- 设置弹窗 ---- */
.modal-mask { position: fixed; inset: 0; background: rgba(11, 18, 32, 0.45); display: flex; align-items: center; justify-content: center; z-index: 100; padding: var(--space-4); }
.modal-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); width: 100%; max-width: 460px; padding: var(--space-6); box-shadow: var(--shadow); max-height: calc(100vh - 48px); overflow-y: auto; }
.modal-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: var(--space-3); }
.modal-head h3 { margin: 0; font-size: 18px; font-weight: 700; color: var(--ink); }
.modal-x { border: none; background: transparent; font-size: 24px; line-height: 1; color: var(--ink-tertiary); cursor: pointer; }
.modal-desc { font-size: 13px; color: var(--ink-secondary); line-height: 1.6; margin: 0 0 var(--space-4); }
.field { margin-bottom: var(--space-4); }
.field label { display: block; font-size: 13px; font-weight: 600; color: var(--ink-secondary); margin-bottom: 6px; }
.field select, .field input { width: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: var(--radius); font-size: 14px; font-family: inherit; color: var(--ink); background: var(--surface); outline: none; }
.field select:focus, .field input:focus { border-color: var(--brand); box-shadow: 0 0 0 4px var(--brand-soft); }
.modal-help { font-size: 12px; color: var(--ink-tertiary); line-height: 1.5; margin-bottom: var(--space-4); }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; }
.modal-note { font-size: 12px; line-height: 1.5; color: var(--warn-ink); background: var(--warn-bg); border: 1px solid var(--warn-line); border-radius: var(--radius); padding: 8px 10px; margin-bottom: var(--space-4); min-height: 0; }
.modal-note:empty { display: none; }

/* ---- 深色适配（新增组件） ---- */
[data-theme="dark"] .tabbar { background: rgba(10, 15, 28, 0.6); border-top-color: var(--line); }
[data-theme="dark"] .tab:hover { background: rgba(255, 255, 255, 0.06); }
[data-theme="dark"] .grp-pick-btn:hover { border-color: #2f3e57; }
[data-theme="dark"] .mk-btn.on-known { background: #0e2b22; color: #6ee7b7; }
[data-theme="dark"] .mk-btn.on-fuzzy { background: #2b2410; color: #fcd34d; }
[data-theme="dark"] .mk-btn.on-unknown { background: #2a1212; color: #fca5a5; }
[data-theme="dark"] .practice-feedback.ok { background: #0e2b22; color: #6ee7b7; }
[data-theme="dark"] .practice-feedback.bad { background: #2a1212; color: #fca5a5; }
[data-theme="dark"] .iv-msg.bot .iv-bubble { background: var(--surface-raised); }
[data-theme="dark"] .iv-report-bubble.report { background: var(--surface-subtle); }

/* ---- 新增组件响应式 ---- */
@media (max-width: 560px) {
  .grp-pick { grid-template-columns: 1fr; }
  .tab { padding: 8px 14px; font-size: 13px; }
  .iv-wrap { height: calc(100vh - 260px); }
}