/* ============================================================
   赛博神灯 · 样式
   深色工程 · 克制科技风
   —— 深灰蓝底 + 电光蓝强调 + 状态绿，等宽字标签，细网格背景，
      卡片做成仪器面板（HUD 角标），克制不加霓虹彩虹。
   ============================================================ */

/* ---------- Design Tokens ---------- */
:root {
  --bg: #0b0f17;
  --bg-2: #0d1220;
  --surface: #111726;
  --surface-2: #161c2c;
  --border: #1e2738;
  --border-strong: #2c3a51;
  --text: #d6e0ef;
  --muted: #8a97ab;

  --accent: #58a6ff;
  --accent-soft: rgba(88, 166, 255, 0.12);
  --accent-border: rgba(88, 166, 255, 0.28);
  --accent-text: #8ec2ff;

  --green: #3fb950;
  --green-soft: rgba(63, 185, 80, 0.12);
  --green-border: rgba(63, 185, 80, 0.34);
  --amber: #d29922;
  --gold: #f5b301;

  --radius: 12px;
  --radius-sm: 7px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 16px 40px rgba(0, 0, 0, 0.5);
  --glow: 0 0 0 1px var(--accent-border), 0 0 22px rgba(88, 166, 255, 0.12);

  --max-width: 1120px;
  --header-h: 64px;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", "JetBrains Mono", "Cascadia Code",
    "Consolas", "Courier New", monospace;
}

/* ---------- Reset / Base ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* 背景：极淡工程网格 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(88, 166, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(88, 166, 255, 0.035) 1px, transparent 1px);
  background-size: 34px 34px;
  mask-image: radial-gradient(120% 90% at 50% 0%, #000 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(120% 90% at 50% 0%, #000 40%, transparent 100%);
}

/* ---------- 背景动效 · 扫描线 + 尘埃 ---------- */
.bg-fx {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  overflow: hidden;
}

/* 扫描线：极淡光带缓慢自上而下扫过 */
.bg-scanline {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 150px;
  background: linear-gradient(
    180deg,
    transparent,
    rgba(88, 166, 255, 0.05) 42%,
    rgba(88, 166, 255, 0.11) 50%,
    rgba(88, 166, 255, 0.05) 58%,
    transparent
  );
  animation: scanline-move 9s linear infinite;
}

@keyframes scanline-move {
  from { transform: translateY(-160px); }
  to { transform: translateY(100vh); }
}

/* 尘埃：几粒细小漂浮物，各自上浮并淡入淡出 */
.bg-dustfield {
  position: absolute;
  inset: 0;
}

.dust {
  position: absolute;
  left: var(--x);
  top: var(--y);
  width: var(--s);
  height: var(--s);
  border-radius: 50%;
  background: rgba(214, 224, 239, 0.55);
  box-shadow: 0 0 6px rgba(214, 224, 239, 0.35);
  opacity: 0;
  animation: dust-float var(--d) linear var(--delay) infinite;
}

@keyframes dust-float {
  0% { transform: translate(0, 0); opacity: 0; }
  12% { opacity: var(--op); }
  85% { opacity: var(--op); }
  100% { transform: translate(var(--dx), var(--dy)); opacity: 0; }
}

a {
  color: var(--accent-text);
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

button {
  font-family: inherit;
  cursor: pointer;
}

/* ---------- Top Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  height: var(--header-h);
  background: rgba(11, 15, 23, 0.72);
  backdrop-filter: blur(12px) saturate(140%);
  -webkit-backdrop-filter: blur(12px) saturate(140%);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  height: 100%;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  white-space: nowrap;
}

/* lamp 微光圆点：一盏小灯 */
.brand-glow {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 33%, #fff4c6, #ffcf5c 55%, #e0a200);
  box-shadow: 0 0 12px 1px rgba(255, 207, 92, 0.55), 0 0 0 4px rgba(245, 179, 1, 0.06);
  animation: lamp-pulse 3.4s ease-in-out infinite;
  flex-shrink: 0;
}

@keyframes lamp-pulse {
  0%, 100% { box-shadow: 0 0 10px 1px rgba(255, 207, 92, 0.5), 0 0 0 4px rgba(245, 179, 1, 0.05); }
  50% { box-shadow: 0 0 16px 2px rgba(255, 207, 92, 0.72), 0 0 0 5px rgba(245, 179, 1, 0.09); }
}

.brand-name {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 1px;
}

.brand-tag {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 1.5px;
  color: var(--muted);
  text-transform: uppercase;
  padding-left: 12px;
  border-left: 1px solid var(--border-strong);
  transform: translateY(1px);
}

/* ---------- Search ---------- */
.search-box {
  position: relative;
  width: min(320px, 42vw);
}

.search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--muted);
  pointer-events: none;
  display: flex;
}

.search-input {
  width: 100%;
  padding: 9px 36px 9px 36px;
  font-size: 13.5px;
  font-family: var(--font-mono);
  color: var(--text);
  background: rgba(13, 18, 32, 0.6);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.search-input::placeholder {
  color: var(--muted);
}

.search-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.search-clear {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  width: 22px;
  height: 22px;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--border-strong);
  color: var(--text);
  font-size: 14px;
  line-height: 1;
  display: none;
  align-items: center;
  justify-content: center;
  transition: background 0.15s ease;
}

.search-clear:hover {
  background: var(--accent);
  color: #fff;
}

.search-box.has-value .search-clear {
  display: flex;
}

/* ---------- Main Layout ---------- */
.site-main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 44px 24px 72px;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 32px 0 44px;
  text-align: center;
  overflow: hidden;
}

/* lamp 光晕：冷蓝主光 + 极淡暖金（灯） */
.hero::before {
  content: "";
  position: absolute;
  inset: -30% -10% auto;
  height: 420px;
  background:
    radial-gradient(46% 58% at 50% 2%, rgba(88, 166, 255, 0.22), transparent 62%),
    radial-gradient(26% 42% at 47% 10%, rgba(245, 179, 1, 0.10), transparent 68%);
  filter: blur(12px);
  pointer-events: none;
  z-index: 0;
}

.hero > * {
  position: relative;
  z-index: 1;
}

.hero-eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 2.5px;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 16px;
}

.hero-eyebrow::after {
  content: "";
  display: block;
  width: 64px;
  height: 1px;
  margin: 10px auto 0;
  background: linear-gradient(90deg, transparent, var(--accent-border), transparent);
}

.hero h1 {
  margin: 0 0 14px;
  font-size: clamp(36px, 6vw, 54px);
  font-weight: 800;
  letter-spacing: 2px;
  line-height: 1.12;
  text-shadow: 0 0 28px rgba(88, 166, 255, 0.28);
}

.hero .hero-sub {
  margin: 0 auto;
  max-width: 560px;
  color: var(--muted);
  font-size: 15.5px;
}

.hero .hero-count {
  margin-top: 20px;
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.5px;
  color: var(--green);
  padding: 7px 16px;
  background: var(--green-soft);
  border: 1px solid var(--green-border);
  border-radius: var(--radius-sm);
}

/* ---------- Category Filter ---------- */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin: 10px 0 30px;
}

.filter-pill {
  padding: 7px 15px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.4px;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: color 0.16s ease, border-color 0.16s ease,
    background 0.16s ease, box-shadow 0.16s ease;
}

.filter-pill:hover {
  color: var(--text);
  border-color: var(--border-strong);
  background: var(--surface);
}

.filter-pill.is-active {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 16px rgba(88, 166, 255, 0.34);
}

/* ---------- Toolbar (count + sort) ---------- */
.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 20px;
}

.toolbar .result-count {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--muted);
  letter-spacing: 0.4px;
}

.sort-control {
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--muted);
}

.sort-control select {
  padding: 6px 10px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color 0.16s ease;
}

.sort-control select:focus {
  outline: none;
  border-color: var(--accent);
}

/* ---------- Card Grid ---------- */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 18px;
}

.tool-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 20px 22px 22px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  color: var(--text);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

/* HUD 四角刻度 */
.tool-card::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  border-radius: var(--radius);
  background:
    linear-gradient(var(--accent), var(--accent)) 0 0 / 14px 1px no-repeat,
    linear-gradient(var(--accent), var(--accent)) 0 0 / 1px 14px no-repeat,
    linear-gradient(var(--accent), var(--accent)) 100% 0 / 14px 1px no-repeat,
    linear-gradient(var(--accent), var(--accent)) 100% 0 / 1px 14px no-repeat,
    linear-gradient(var(--accent), var(--accent)) 0 100% / 14px 1px no-repeat,
    linear-gradient(var(--accent), var(--accent)) 0 100% / 1px 14px no-repeat,
    linear-gradient(var(--accent), var(--accent)) 100% 100% / 14px 1px no-repeat,
    linear-gradient(var(--accent), var(--accent)) 100% 100% / 1px 14px no-repeat;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.tool-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent-border);
  box-shadow: var(--shadow-md), var(--glow);
}

.tool-card:hover::before {
  opacity: 0.6;
}

.tool-card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* 卡片头：模块编号 + 状态 */
.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.module-id {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 1.2px;
  color: var(--muted);
}

.card-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 1px;
}

.card-status .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 8px currentColor;
}

.card-status.online { color: var(--green); }
.card-status.beta { color: var(--amber); }
.card-status.planned { color: var(--muted); }

/* 图标 + 标题行 */
.card-icon-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.card-icon {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  font-size: 22px;
  background: var(--accent-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.card-title {
  margin: 0;
  font-size: 16.5px;
  font-weight: 700;
  letter-spacing: 0.3px;
}

.card-desc {
  margin: 0;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
}

.card-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.3px;
  color: var(--accent-text);
  background: var(--accent-soft);
  border: 1px solid var(--accent-border);
  border-radius: 4px;
  padding: 3px 8px;
}

/* ---------- Empty State ---------- */
.empty-state {
  text-align: center;
  padding: 70px 20px;
  color: var(--muted);
  font-family: var(--font-mono);
}

.empty-state .empty-emoji {
  font-size: 40px;
  display: block;
  margin-bottom: 14px;
  filter: grayscale(0.3);
}

.empty-state p {
  margin: 4px 0;
  font-size: 13px;
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 30px 24px 44px;
  color: var(--muted);
  background: var(--bg-2);
}

.site-footer .footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.5px;
}

.foot-brand {
  color: var(--text);
  letter-spacing: 1px;
}

/* ---------- 404 ---------- */
.notfound {
  text-align: center;
  padding: 20vh 20px 0;
}

.notfound h1 {
  font-size: clamp(44px, 10vw, 88px);
  margin: 0 0 14px;
  font-weight: 800;
  letter-spacing: 4px;
  font-family: var(--font-mono);
  text-shadow: 0 0 30px rgba(88, 166, 255, 0.3);
}

.notfound p {
  color: var(--muted);
  margin: 0 0 26px;
}

.notfound a {
  font-weight: 600;
}

/* ---------- Dynamic FX · 打字机光标 + 进场动画 ---------- */
.type-text {
  white-space: pre-wrap;
}

.type-caret {
  display: inline-block;
  width: 8px;
  height: 1.05em;
  margin-left: 3px;
  vertical-align: text-bottom;
  background: var(--accent);
  box-shadow: 0 0 8px rgba(88, 166, 255, 0.6);
  animation: caret-blink 1.05s steps(2, start) infinite;
}

@keyframes caret-blink {
  0%, 50% { opacity: 1; }
  50.01%, 100% { opacity: 0; }
}

/* 屏幕阅读器专用（打字动画的完整文本） */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* 已移除入场淡入动画：`animation-fill-mode: both` 会让元素先透明再弹现，
   首屏出现"空一下再冒出来"的闪烁/卡顿。仅保留打字机与扫描线/尘埃动效。 */

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
  .header-inner {
    padding: 0 16px;
  }

  .brand-tag {
    display: none;
  }

  .brand-name {
    font-size: 16px;
  }

  .search-box {
    width: min(48vw, 220px);
  }

  .site-main {
    padding: 26px 16px 52px;
  }

  .hero {
    padding: 24px 0 32px;
  }

  .toolbar {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}

/* ---------- Motion: respect reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  /* 背景扫描线 / 尘埃：关闭并隐藏 */
  .bg-scanline,
  .dust {
    animation: none !important;
    opacity: 0 !important;
  }

  /* 打字光标：减少动态时静止不闪（避免 0.01ms 导致高频狂闪） */
  .type-caret {
    animation: none !important;
    opacity: 1 !important;
  }
}