/* ============================================================
   Skills Collection — 视觉样式
   依据 better-ui 设计原则:同心圆角 / 阴影优于边框 /
   可中断过渡 / 交错进入动画 / scale-on-press / 指定 transition 属性
   ============================================================ */

:root {
  /* 色彩 */
  --bg: #f4f5fa;
  --card-bg: #ffffff;
  --text: #1c2030;
  --text-soft: #565d73;
  --text-faint: #8b91a6;
  --accent: #5b4bd8;
  --accent-strong: #4536c0;
  --accent-soft: #efecff;
  --accent-faint: #f5f3ff;
  --zh-bg: #fff8ec;
  --zh-border: #ffcf7d;
  --border: #e7e9f2;
  --border-strong: #d9dcea;

  /* 阴影阶梯(多层透明,优于硬边框) */
  --shadow-sm:
    0 1px 2px rgba(22, 28, 60, 0.04),
    0 1px 3px rgba(22, 28, 60, 0.05);
  --shadow-md:
    0 1px 2px rgba(22, 28, 60, 0.04),
    0 4px 12px rgba(22, 28, 60, 0.06),
    0 12px 32px rgba(22, 28, 60, 0.05);
  --shadow-lg:
    0 2px 4px rgba(22, 28, 60, 0.05),
    0 10px 24px rgba(22, 28, 60, 0.10),
    0 24px 56px rgba(22, 28, 60, 0.08);

  /* 圆角阶梯(同心:外层 = 内层 + padding) */
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 20px;

  /* 动效 */
  --ease-out: cubic-bezier(0.2, 0, 0, 1);
  --dur: 0.18s;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* ---------- 头部 ---------- */
.hero {
  position: relative;
  overflow: hidden;
  color: #fff;
  padding: 52px 20px 44px;
  text-align: center;
  background: linear-gradient(160deg, #4a3cc4 0%, #6c5ce7 42%, #8f7ef8 72%, #74b9ff 100%);
}

/* 顶部与底部光晕,营造层次 */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(640px 320px at 82% -18%, rgba(255, 255, 255, 0.28), transparent 62%),
    radial-gradient(520px 280px at 8% 112%, rgba(116, 185, 255, 0.35), transparent 60%),
    radial-gradient(300px 180px at 45% 0%, rgba(255, 255, 255, 0.10), transparent 70%);
  pointer-events: none;
}

/* 底部柔和过渡到页面背景 */
.hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 44px;
  background: linear-gradient(to bottom, transparent, var(--bg));
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 1080px;
  margin: 0 auto;
}

.hero h1 {
  margin: 0 0 8px;
  font-size: 2.1rem;
  font-weight: 800;
  letter-spacing: 0.3px;
  text-shadow: 0 2px 24px rgba(30, 20, 90, 0.25);
}

.subtitle {
  margin: 0;
  opacity: 0.94;
  font-size: 0.98rem;
  font-weight: 400;
}

.subscribe {
  margin-top: 20px;
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.rss-btn, .gh-btn {
  display: inline-block;
  padding: 9px 22px;
  border-radius: 999px;
  font-size: 0.88rem;
  font-weight: 650;
  text-decoration: none;
  transition: transform var(--dur) var(--ease-out),
              box-shadow var(--dur) var(--ease-out),
              background-color var(--dur) var(--ease-out);
}

.rss-btn {
  background: #fff;
  color: #e8590c;
  box-shadow: 0 2px 8px rgba(30, 20, 90, 0.18);
}

.gh-btn {
  background: rgba(255, 255, 255, 0.16);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.45);
}

.rss-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(30, 20, 90, 0.25);
}

.gh-btn:hover {
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.26);
}

.rss-btn:active, .gh-btn:active { transform: scale(0.96); }

/* ---------- 主体 ---------- */
.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 28px 20px 56px;
}

.toolbar {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}

.search {
  flex: 1;
  min-width: 240px;
  padding: 12px 20px;
  font-size: 0.95rem;
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  background: var(--card-bg);
  box-shadow: var(--shadow-sm);
  outline: none;
  transition: border-color var(--dur) var(--ease-out),
              box-shadow var(--dur) var(--ease-out);
}

.search::placeholder { color: var(--text-faint); }

.search:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft), var(--shadow-sm);
}

.count {
  font-size: 0.82rem;
  color: var(--text-soft);
  background: var(--card-bg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  padding: 7px 14px;
  border-radius: 999px;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

/* ---------- 标签筛选栏 ---------- */
.tag-filters {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: 0 0 22px;
}

.tag-filters:empty { display: none; }

.tag-filter {
  border: 1px solid var(--border);
  background: var(--card-bg);
  color: var(--text-soft);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: transform var(--dur) var(--ease-out),
              background-color var(--dur) var(--ease-out),
              color var(--dur) var(--ease-out),
              border-color var(--dur) var(--ease-out);
}

.tag-filter:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-faint);
}

.tag-filter:active { transform: scale(0.96); }

.tag-filter.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  box-shadow: 0 2px 10px rgba(91, 75, 216, 0.35);
}

/* ---------- 提示条 ---------- */
.banner {
  background: #fff1f1;
  color: #a33;
  border: 1px solid #f6d0d0;
  border-radius: var(--radius);
  padding: 14px 18px;
  margin-bottom: 20px;
  font-size: 0.9rem;
  box-shadow: var(--shadow-sm);
}

/* ---------- 卡片网格 ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 18px;
}

/* 进入动画:交错上浮(仅初始/重建时,backwards 不覆盖 hover) */
.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: 22px 22px 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: transform var(--dur) var(--ease-out),
              box-shadow var(--dur) var(--ease-out),
              border-color var(--dur) var(--ease-out);
  animation: card-in 0.34s var(--ease-out) backwards;
}

.card:nth-child(2)  { animation-delay: 0.04s; }
.card:nth-child(3)  { animation-delay: 0.08s; }
.card:nth-child(4)  { animation-delay: 0.12s; }
.card:nth-child(5)  { animation-delay: 0.16s; }
.card:nth-child(6)  { animation-delay: 0.20s; }
.card:nth-child(7)  { animation-delay: 0.24s; }
.card:nth-child(8)  { animation-delay: 0.28s; }
.card:nth-child(9)  { animation-delay: 0.32s; }
.card:nth-child(10) { animation-delay: 0.36s; }
.card:nth-child(11) { animation-delay: 0.40s; }
.card:nth-child(12) { animation-delay: 0.44s; }

@keyframes card-in {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-lg);
}

.card h2 {
  margin: 0;
  font-size: 1.06rem;
  font-weight: 700;
  color: var(--accent-strong);
  word-break: break-all;
  letter-spacing: 0.2px;
}

.desc {
  margin: 0;
  font-size: 0.88rem;
  color: var(--text-soft);
  white-space: pre-line;
  word-break: break-word;
}

/* 中文描述块:左侧色条 + 渐变背景(与卡片同心圆角) */
.zh {
  margin: 0;
  font-size: 0.9rem;
  background: linear-gradient(90deg, var(--zh-bg), #fffdf7);
  border-left: 3px solid var(--zh-border);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 11px 14px;
  white-space: pre-line;
  word-break: break-word;
}

.zh .zh-tag {
  display: inline-block;
  font-size: 0.68rem;
  color: #9c6b00;
  background: #ffe9bd;
  border-radius: 999px;
  padding: 1px 9px;
  margin-bottom: 5px;
  font-weight: 650;
}

/* ---------- 标签 ---------- */
.tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.tag {
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text-soft);
  border-radius: 999px;
  padding: 3px 11px;
  font-size: 0.72rem;
  font-weight: 500;
  cursor: pointer;
  transition: transform var(--dur) var(--ease-out),
              background-color var(--dur) var(--ease-out),
              color var(--dur) var(--ease-out),
              border-color var(--dur) var(--ease-out);
}

.tag:hover {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
}

.tag:active { transform: scale(0.94); }

/* ---------- 卡片底部 ---------- */
.card-footer {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
  padding-top: 12px;
  border-top: 1px dashed var(--border);
}

.source {
  color: var(--accent);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  transition: color var(--dur) var(--ease-out);
}

.source:hover {
  color: var(--accent-strong);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.meta {
  display: flex;
  gap: 8px;
  align-items: center;
  font-size: 0.72rem;
}

.badge {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text-soft);
  border-radius: 999px;
  padding: 2px 9px;
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-variant-numeric: tabular-nums;
}

.empty {
  text-align: center;
  color: var(--text-soft);
  padding: 64px 0;
  font-size: 1.05rem;
}

/* ---------- 页脚 ---------- */
.footer {
  text-align: center;
  padding: 24px 20px 32px;
  color: var(--text-soft);
  font-size: 0.8rem;
  border-top: 1px solid var(--border);
}

.footer code {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1px 7px;
}

.copyright {
  margin: 6px 0 0;
  font-size: 0.75rem;
  color: var(--text-faint);
}

/* ---------- 响应式 ---------- */
@media (max-width: 640px) {
  .hero { padding: 40px 16px 36px; }
  .hero h1 { font-size: 1.55rem; }
  .grid { grid-template-columns: 1fr; }
  .search { min-width: 0; }
}

/* ---------- 减少动态效果偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .card { animation: none; }
  .card:hover { transform: none; }
  .rss-btn:hover, .gh-btn:hover, .tag-filter:hover, .tag:hover { transform: none; }
  * { transition-duration: 0.01ms !important; }
}