/* ===== 抽象搜索引擎 · 霓虹海军蓝 ===== */

:root {
  --bg-primary: #060b14;
  --bg-secondary: #0c1426;
  --bg-card: #111b33;
  --bg-card-hover: #162244;
  --text-primary: #e2e8f0;
  --text-secondary: #8899bb;
  --text-muted: #556688;
  --accent: #00c8e8;
  --accent-glow: rgba(0, 200, 232, 0.25);
  --accent-dim: #006680;
  --border: #1a2a4a;
  --success: #00e898;
  --danger: #ff4466;
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.2s ease;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  min-height: 100vh;
  line-height: 1.6;
}

/* ===== Header ===== */

.header {
  text-align: center;
  padding: 48px 24px 24px;
}

.logo {
  font-size: 2.4rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--accent), #68d4ff, var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 4px;
}

.subtitle {
  color: var(--text-muted);
  font-size: 0.9rem;
  letter-spacing: 0.1em;
}

/* ===== Search ===== */

.search-section {
  max-width: 640px;
  margin: 0 auto 16px;
  padding: 0 24px;
}

.search-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
}

.search-icon {
  position: absolute;
  left: 16px;
  color: var(--text-muted);
  pointer-events: none;
  z-index: 1;
}

#searchInput {
  width: 100%;
  padding: 14px 16px 14px 44px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-size: 1rem;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

#searchInput::placeholder {
  color: var(--text-muted);
}

#searchInput:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

#randomBtn {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-secondary);
  color: var(--accent);
  cursor: pointer;
  font-size: 1.2rem;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

#randomBtn:hover {
  border-color: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
  transform: rotate(15deg);
}

#randomBtn.spin {
  animation: spin 0.5s ease-in-out;
}

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

/* ===== Tabs ===== */

.tabs {
  max-width: 640px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  gap: 4px;
}

.tab-btn {
  flex: 1;
  padding: 10px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.9rem;
  cursor: pointer;
  transition: all var(--transition);
}

.tab-btn:first-child {
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
}

.tab-btn:last-child {
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.tab-btn.active {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent);
  font-weight: 600;
  box-shadow: 0 0 12px var(--accent-glow);
}

.tab-btn:hover:not(.active) {
  border-color: var(--text-muted);
  color: var(--text-primary);
}

/* ===== Tag Pills ===== */

.tag-section {
  max-width: 640px;
  margin: 12px auto 0;
  padding: 0 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag-pill {
  padding: 4px 12px;
  border-radius: 99px;
  border: 1px solid var(--border);
  background: var(--bg-secondary);
  color: var(--text-secondary);
  font-size: 0.78rem;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

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

.tag-pill.active {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent);
}

/* ===== Results ===== */

.results-section {
  max-width: 800px;
  margin: 20px auto;
  padding: 0 24px;
}

.result-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

#resultCount {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* Text Cards */

#resultsContainer {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.text-card {
  display: flex;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all var(--transition);
}

.text-card:hover {
  border-color: var(--accent);
  background: var(--bg-card-hover);
  box-shadow: 0 4px 20px rgba(0, 200, 232, 0.08);
}

.text-card-body {
  flex: 1;
  padding: 16px;
  min-width: 0;
}

.text-content {
  color: var(--text-primary);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 10px;
}

.text-card-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.text-source {
  color: var(--text-muted);
  font-size: 0.78rem;
}

.text-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.copy-btn {
  flex-shrink: 0;
  width: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  border-left: 1px solid var(--border);
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition);
}

.copy-btn:hover {
  background: var(--accent-dim);
  color: var(--accent);
}

.copy-btn.copied {
  background: rgba(0, 232, 152, 0.15);
  color: var(--success);
}

/* Image Cards */

#resultsContainer:has(.image-card) {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 12px;
}

.image-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: all var(--transition);
}

.image-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 200, 232, 0.12);
}

.image-wrapper {
  aspect-ratio: 1;
  overflow: hidden;
  background: var(--bg-secondary);
}

.image-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.image-card:hover .image-wrapper img {
  transform: scale(1.05);
}

.image-fallback {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--text-muted);
  font-size: 0.85rem;
  text-align: center;
  padding: 16px;
  line-height: 1.4;
}

.image-card-footer {
  padding: 10px 12px;
}

.image-alt {
  display: block;
  font-size: 0.85rem;
  color: var(--text-primary);
  margin-bottom: 4px;
  font-weight: 500;
}

.image-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 3px;
}

.image-card-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 6px;
}

.download-btn-card {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--accent);
  cursor: pointer;
  transition: all var(--transition);
}

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

.tag {
  display: inline-block;
  padding: 1px 6px;
  font-size: 0.72rem;
  color: var(--accent);
  cursor: pointer;
  border-radius: 4px;
  transition: all var(--transition);
}

.tag:hover {
  background: var(--accent-dim);
}

/* ===== Empty State ===== */

.empty-state {
  text-align: center;
  padding: 60px 24px;
}

.empty-icon {
  font-size: 4rem;
  margin-bottom: 16px;
  opacity: 0.6;
}

.empty-text {
  color: var(--text-muted);
  font-size: 1.1rem;
}

/* ===== Modal ===== */

.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(6, 11, 20, 0.92);
  backdrop-filter: blur(8px);
  z-index: 100;
  align-items: center;
  justify-content: center;
}

.modal-overlay.show {
  display: flex;
}

.modal-content {
  max-width: 90vw;
  max-height: 90vh;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
}

.modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: none;
  background: rgba(0,0,0,0.5);
  color: var(--text-primary);
  font-size: 1.2rem;
  cursor: pointer;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
}

.modal-close:hover {
  background: var(--danger);
}

.modal-content img {
  max-width: 90vw;
  max-height: 75vh;
  display: block;
}

.modal-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  background: var(--bg-secondary);
}

.modal-caption {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.modal-copy {
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--accent);
  font-size: 0.82rem;
  cursor: pointer;
  transition: all var(--transition);
}

.modal-copy:hover {
  border-color: var(--accent);
  background: var(--accent-dim);
}

.modal-actions {
  display: flex;
  gap: 8px;
}

.modal-download {
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--accent);
  background: var(--accent-dim);
  color: var(--accent);
  font-size: 0.82rem;
  cursor: pointer;
  transition: all var(--transition);
}

.modal-download:hover {
  background: var(--accent);
  color: var(--bg-primary);
}

/* ===== Footer ===== */

.footer {
  text-align: center;
  padding: 40px 24px;
  color: var(--text-muted);
  font-size: 0.8rem;
  border-top: 1px solid var(--border);
  margin-top: 40px;
}

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

/* ===== Responsive ===== */

@media (max-width: 640px) {
  .header {
    padding: 32px 16px 16px;
  }
  .logo {
    font-size: 1.8rem;
  }
  .search-section,
  .tabs,
  .tag-section,
  .results-section {
    padding-left: 16px;
    padding-right: 16px;
  }
  #resultsContainer:has(.image-card) {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  }
  .text-content {
    font-size: 0.88rem;
  }
}