:root {
  --bg: #0d1117;
  --bg-elevated: #161b22;
  --bg-hover: #1f2937;
  --border: #30363d;
  --text: #e6edf3;
  --text-muted: #8b949e;
  --text-subtle: #6e7681;
  --accent: #2f81f7;
  --accent-hover: #4493f8;
  --accent-soft: rgba(47, 129, 247, 0.12);
  --star: #f7c948;
  --danger: #f85149;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
  --transition: 160ms cubic-bezier(0.2, 0.8, 0.2, 1);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body { position: relative; overflow-x: hidden; }

.bg-gradient {
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(900px 600px at 12% -5%, rgba(47, 129, 247, 0.18), transparent 60%),
    radial-gradient(800px 500px at 100% 0%, rgba(124, 77, 255, 0.16), transparent 55%),
    radial-gradient(700px 500px at 50% 110%, rgba(33, 199, 144, 0.10), transparent 60%);
  pointer-events: none;
}

.header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(13, 17, 23, 0.72);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  font-size: 16px;
  letter-spacing: 0.2px;
}

.logo svg { color: var(--text); }

.header-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 13px;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  transition: var(--transition);
}

.header-link:hover {
  color: var(--text);
  border-color: var(--accent);
  background: var(--accent-soft);
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

.hero {
  text-align: center;
  margin-bottom: 40px;
}

.hero-title {
  font-size: 34px;
  font-weight: 700;
  letter-spacing: -0.4px;
  margin: 0 0 12px;
  background: linear-gradient(135deg, #e6edf3 0%, #8b949e 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  color: var(--text-muted);
  font-size: 15px;
  margin: 0 0 28px;
}

.search-form {
  max-width: 720px;
  margin: 0 auto;
}

.search-input-wrap {
  position: relative;
  display: flex;
  align-items: center;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 6px 6px 18px;
  transition: var(--transition);
  box-shadow: var(--shadow);
}

.search-input-wrap:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.search-icon {
  color: var(--text-subtle);
  flex-shrink: 0;
  margin-right: 10px;
}

.search-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text);
  font-size: 15px;
  font-family: var(--font);
  padding: 10px 0;
  min-width: 0;
}

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

.search-btn {
  flex-shrink: 0;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 999px;
  padding: 10px 22px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.search-btn:hover { background: var(--accent-hover); }
.search-btn:active { transform: translateY(1px); }
.search-btn:disabled { opacity: 0.7; cursor: progress; }

.btn-spinner {
  display: none;
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

.search-btn.loading .btn-text { visibility: hidden; }
.search-btn.loading .btn-spinner { display: inline-block; position: absolute; left: 50%; transform: translateX(-50%); }
.search-btn.loading { position: relative; }

@keyframes spin { to { transform: rotate(360deg); } }

.filters {
  display: flex;
  gap: 12px;
  margin-top: 16px;
  flex-wrap: wrap;
  justify-content: center;
}

.filter-group {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 4px 8px 4px 12px;
  width: 180px;
}

.filter-group label {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 500;
  flex-shrink: 0;
  white-space: nowrap;
}

.select {
  background: transparent;
  border: none;
  outline: none;
  color: var(--text);
  font-size: 13px;
  font-family: var(--font);
  padding: 6px 4px;
  cursor: pointer;
  flex: 1;
  text-align: left;
  text-align-last: left;
}

.select option { background: var(--bg-elevated); color: var(--text); }

.results-section { margin-top: 8px; }

.status-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 32px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.result-count {
  color: var(--text-muted);
  font-size: 13px;
}

.result-count strong { color: var(--text); font-weight: 600; }

.pagination {
  display: flex;
  align-items: center;
  gap: 6px;
}

.page-btn {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 13px;
  font-family: var(--font);
  transition: var(--transition);
}

.page-btn:hover:not(:disabled) {
  border-color: var(--accent);
  color: var(--accent);
}

.page-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.page-info {
  color: var(--text-muted);
  font-size: 13px;
  padding: 0 8px;
}

.results {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 16px;
}

.card {
  background: linear-gradient(180deg, rgba(22, 27, 34, 0.9), rgba(22, 27, 34, 0.75));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  gap: 12px;
  position: relative;
  overflow: hidden;
  animation: cardIn 320ms cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

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

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: var(--transition);
}

.card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.card:hover::before { opacity: 1; }

.card-header {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.card-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-hover);
  flex-shrink: 0;
  border: 1px solid var(--border);
  box-shadow: 0 0 0 2px rgba(47, 129, 247, 0.08);
  transition: var(--transition);
}

.card:hover .card-avatar { box-shadow: 0 0 0 3px rgba(47, 129, 247, 0.18); }

.card-titles { min-width: 0; flex: 1; }

.card-title {
  font-size: 16px;
  font-weight: 600;
  margin: 0 0 2px;
  word-break: break-word;
}

.card-title a {
  color: var(--accent);
  text-decoration: none;
  transition: var(--transition);
}

.card-title a:hover { text-decoration: underline; color: var(--accent-hover); }

.card-owner {
  font-size: 12px;
  color: var(--text-muted);
}

.card-owner a { color: var(--text-muted); text-decoration: none; }
.card-owner a:hover { color: var(--text); text-decoration: underline; }

.card-desc {
  color: var(--text);
  font-size: 13px;
  line-height: 1.55;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 20px;
}

.card-desc.empty { color: var(--text-subtle); font-style: italic; }

.card-topics {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.topic {
  font-size: 11px;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 2px 10px;
  font-weight: 500;
}

.card-footer {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 12px;
  color: var(--text-muted);
  flex-wrap: wrap;
  padding-top: 4px;
  border-top: 1px solid var(--border);
  margin-top: 2px;
}

.stat {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.stat svg { color: var(--text-subtle); }

.lang-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
  flex-shrink: 0;
}

.lang-name { color: var(--text-muted); }

.star-count { color: var(--star); font-weight: 500; }

.updated { color: var(--text-subtle); margin-left: auto; }

.releases-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  width: 100%;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 500;
  font-family: var(--font);
  padding: 9px 14px;
  cursor: pointer;
  transition: var(--transition);
  margin-top: 2px;
}

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

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

.releases-btn svg { flex-shrink: 0; }

.releases-btn-chevron {
  transition: transform var(--transition);
  margin-left: 2px;
}

.releases-btn.is-open .releases-btn-chevron { transform: rotate(180deg); }

.release-panel {
  animation: panelSlide 220ms cubic-bezier(0.2, 0.8, 0.2, 1);
  transform-origin: top;
}

@keyframes panelSlide {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

.release-inner {
  background: rgba(1, 4, 9, 0.5);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.release-item {
  border-radius: 6px;
  padding: 10px 12px;
  background: var(--bg-elevated);
  border: 1px solid transparent;
  transition: var(--transition);
}

.release-item:hover { border-color: var(--border); }

.release-item.is-prerelease { border-left: 3px solid #d29922; }

.release-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}

.release-head-left {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.release-badge {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  padding: 2px 7px;
  border-radius: 999px;
  flex-shrink: 0;
}

.release-badge.latest {
  background: rgba(63, 185, 80, 0.16);
  color: #3fb950;
  border: 1px solid rgba(63, 185, 80, 0.3);
}

.release-badge.pre {
  background: rgba(210, 153, 34, 0.16);
  color: #d29922;
  border: 1px solid rgba(210, 153, 34, 0.3);
}

.release-tag {
  color: var(--text);
  font-size: 13px;
  font-weight: 600;
  font-family: var(--mono);
  text-decoration: none;
  word-break: break-all;
  transition: var(--transition);
}

.release-tag:hover { color: var(--accent); text-decoration: underline; }

.release-date {
  font-size: 11px;
  color: var(--text-subtle);
  flex-shrink: 0;
}

.release-assets {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.asset-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 7px 9px;
  border-radius: 6px;
  background: rgba(1, 4, 9, 0.4);
  border: 1px solid var(--border);
  transition: var(--transition);
}

.asset-row:hover { border-color: rgba(47, 129, 247, 0.35); }

.asset-info {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.asset-name {
  font-size: 12px;
  color: var(--text);
  font-family: var(--mono);
  word-break: break-all;
  line-height: 1.4;
}

.asset-meta {
  font-size: 10px;
  color: var(--text-subtle);
}

.asset-actions {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}

.asset-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  font-weight: 500;
  font-family: var(--font);
  padding: 5px 10px;
  border-radius: 6px;
  cursor: pointer;
  text-decoration: none;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  transition: var(--transition);
  white-space: nowrap;
}

.download-btn:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.copy-btn:hover {
  border-color: var(--text-muted);
  color: var(--text);
}

.copy-btn.copied {
  background: rgba(63, 185, 80, 0.16);
  border-color: rgba(63, 185, 80, 0.4);
  color: #3fb950;
}

.release-empty {
  text-align: center;
  padding: 20px 12px;
  font-size: 13px;
  color: var(--text-subtle);
}

.release-skeleton { display: flex; flex-direction: column; gap: 8px; padding: 10px 12px; }
.release-skel-title { height: 14px; width: 45%; }
.release-skel-asset { height: 32px; width: 100%; }

.toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--bg-elevated);
  border: 1px solid var(--accent);
  color: var(--text);
  padding: 12px 22px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5), 0 0 0 1px var(--accent-soft);
  opacity: 0;
  pointer-events: none;
  transition: 240ms cubic-bezier(0.2, 0.8, 0.2, 1);
  z-index: 100;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.toast::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #3fb950;
  flex-shrink: 0;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.skeleton {
  background: linear-gradient(90deg, var(--bg-elevated) 25%, var(--bg-hover) 37%, var(--bg-elevated) 63%);
  background-size: 400% 100%;
  animation: shimmer 1.4s ease infinite;
  border-radius: var(--radius-sm);
}

@keyframes shimmer {
  0% { background-position: 100% 0; }
  100% { background-position: -100% 0; }
}

.skeleton-card {
  height: 200px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.empty-state, .error-state {
  text-align: center;
  padding: 80px 24px;
  color: var(--text-muted);
}

.empty-state svg, .error-state svg { color: var(--text-subtle); margin-bottom: 16px; }

.empty-state h3, .error-state h3 {
  color: var(--text);
  font-size: 18px;
  margin: 0 0 8px;
}

.empty-state p, .error-state p {
  margin: 0;
  font-size: 14px;
  max-width: 420px;
  margin-left: auto;
  margin-right: auto;
}

.error-state svg { color: var(--danger); }

@media (max-width: 640px) {
  .hero-title { font-size: 26px; }
  .container { padding: 32px 16px 64px; }
  .results { grid-template-columns: 1fr; }
  .filters { flex-direction: column; align-items: stretch; }
  .filter-group { justify-content: space-between; width: auto; }
  .search-input-wrap { padding: 4px 4px 4px 14px; }
  .search-btn { padding: 8px 16px; }
  .header-inner { padding: 12px 16px; }
  .updated { margin-left: 0; }
  .asset-row { flex-direction: column; align-items: stretch; gap: 8px; }
  .asset-actions { justify-content: flex-end; }
  .release-head { flex-direction: column; align-items: flex-start; }
}