/* ==========================================================================
   Multi-Search Engine Web App Stylesheet
   ========================================================================== */

:root {
  /* Dark Theme (Default) */
  --bg-color: #111714;
  --bg-card: #1a211d;
  --bg-card-hover: #222c26;
  --bg-input: #141b17;
  --border-color: #303b34;
  --border-focus: #69bd91;
  --selection-bg: rgba(67, 166, 125, 0.1);
  --grid-line: rgba(198, 224, 207, 0.012);
  
  --text-main: #edf3ef;
  --text-muted: #a5b1a9;
  --text-dim: #7c8980;
  
  --primary: #43a67d;
  --primary-hover: #56b48b;
  --primary-glow: rgba(67, 166, 125, 0.2);
  
  --accent-cyan: #81c8ae;
  --accent-emerald: #62bd8e;
  --accent-amber: #e2ae61;
  --accent-rose: #df8580;
  --accent-purple: #b299c1;
  
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.18);
  --shadow-md: 0 6px 18px rgba(0, 0, 0, 0.22);
  --shadow-lg: 0 14px 32px rgba(0, 0, 0, 0.3);

  --font-sans: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'IBM Plex Mono', 'SFMono-Regular', Menlo, Monaco, Consolas, monospace;
}

/* Light Theme Variables */
body.theme-light {
  --bg-color: #f2f5f3;
  --bg-card: #ffffff;
  --bg-card-hover: #f5f8f6;
  --bg-input: #f7faf8;
  --border-color: #dce5df;
  --border-focus: #368f6d;
  --selection-bg: rgba(36, 123, 92, 0.08);
  --grid-line: rgba(35, 79, 58, 0.012);
  
  --text-main: #19251e;
  --text-muted: #526158;
  --text-dim: #7a887f;
  
  --primary: #247b5c;
  --primary-hover: #1c684d;
  --primary-glow: rgba(36, 123, 92, 0.16);
  --accent-cyan: #287a69;
  --accent-emerald: #258253;
  --accent-amber: #9a671a;
  --accent-rose: #a74848;
  --accent-purple: #71547f;
  
  --shadow-sm: 0 1px 3px rgba(25, 44, 33, 0.05);
  --shadow-md: 0 6px 18px rgba(25, 44, 33, 0.08);
  --shadow-lg: 0 14px 32px rgba(25, 44, 33, 0.13);
}

/* Reset & Base */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-color);
  color: var(--text-main);
  min-height: 100vh;
  line-height: 1.5;
  transition: background-color 0.25s ease, color 0.25s ease;
  -webkit-font-smoothing: antialiased;
  background-image: linear-gradient(var(--grid-line) 1px, transparent 1px), linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 48px 48px;
}

:focus-visible {
  outline: 2px solid var(--border-focus);
  outline-offset: 3px;
}

.app-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Header */
.app-header {
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-card);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0.85rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.logo-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #23845f, #68b88a);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  box-shadow: 0 4px 12px var(--primary-glow);
}

.header-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent-cyan);
}

.logo-area h1 {
  font-size: 1.2rem;
  font-weight: 700;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.icon-button {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.1rem;
  transition: all 0.2s;
}

.icon-button:hover {
  background: var(--bg-card-hover);
  border-color: var(--primary);
}

.icon-button:focus-visible,
.btn:focus-visible,
.chip:focus-visible,
.tab-btn:focus-visible {
  outline-offset: 3px;
}

body.theme-dark .light-icon { display: block; }
body.theme-dark .dark-icon { display: none; }
body.theme-light .light-icon { display: none; }
body.theme-light .dark-icon { display: block; }

/* Main Content */
.main-content {
  flex: 1;
  max-width: 1180px;
  width: 100%;
  margin: 0 auto;
  padding: 1.75rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

/* Card Style */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.2s ease;
}

/* Search Input Card */
.search-card {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  background: transparent;
  border-color: transparent;
  box-shadow: none;
  padding: 0.5rem 0.25rem;
}

.search-form {
  width: 100%;
}

.search-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.45rem 0.5rem 0.45rem 1rem;
  box-shadow: var(--shadow-sm);
  transition: all 0.2s;
}

.search-input-wrapper:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px var(--primary-glow);
}

.search-input:focus-visible {
  outline: none;
}

.search-icon {
  color: var(--text-dim);
  display: flex;
  align-items: center;
  margin-right: 0.75rem;
}

.search-input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-main);
  font-size: 1.1rem;
  font-family: inherit;
  outline: none;
  min-width: 0;
}

.search-input::placeholder {
  color: var(--text-dim);
  font-size: 0.98rem;
}

.clear-btn {
  background: transparent;
  border: none;
  color: var(--text-dim);
  font-size: 1.5rem;
  padding: 0 0.6rem;
  cursor: pointer;
  line-height: 1;
  display: none;
}

.clear-btn.visible {
  display: block;
}

.clear-btn:hover {
  color: var(--text-main);
}

/* Query Suggestion Chips */
.query-chips {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.85rem;
}

.chips-label {
  color: var(--text-dim);
  font-weight: 500;
  margin-right: 0.25rem;
}

.chip {
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  cursor: pointer;
  transition: all 0.15s ease;
  font-family: inherit;
}

.chip:hover {
  background-color: var(--bg-card-hover);
  color: var(--primary);
  border-color: var(--primary);
}

/* Engine Selection Grid */
.engine-selection-section {
  border-top: 1px solid var(--border-color);
  padding-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.engine-selection-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.section-title-wrap h2 {
  font-size: 1.05rem;
  font-weight: 600;
}

.section-subtitle {
  font-size: 0.85rem;
  color: var(--text-dim);
}

.engine-counter-badge {
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--primary);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius-sm);
}

.engine-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 0.65rem;
}

.engine-card {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.65rem 0.8rem;
  cursor: pointer;
  transition: all 0.2s ease;
  user-select: none;
}

.engine-card input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.engine-card:hover {
  border-color: var(--primary);
  background-color: var(--bg-card-hover);
}

.engine-card:focus-within {
  outline: 2px solid var(--border-focus);
  outline-offset: 2px;
}

.engine-card.active {
  border-color: var(--primary);
  background-color: var(--selection-bg);
  box-shadow: inset 0 0 0 1px var(--selection-bg);
}

.engine-card.disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.engine-icon-badge {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.engine-google { background: #ea4335; color: #fff; }
.engine-bing { background: #008373; color: #fff; }
.engine-duckduckgo { background: #de5833; color: #fff; }
.engine-wikipedia { background: #333333; color: #fff; }
.engine-hackernews { background: #ff6600; color: #fff; }
.engine-github { background: #24292e; color: #fff; }
.engine-openalex { background: #5c35b5; color: #fff; }
.engine-yahoo { background: #6001d2; color: #fff; }
.engine-brave { background: #fb542b; color: #fff; }
.engine-arxiv { background: #b31b1b; color: #fff; }
.engine-ecosia { background: #008575; color: #fff; }

.engine-info {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.engine-name {
  font-size: 0.95rem;
  font-weight: 600;
}

.engine-desc {
  font-size: 0.75rem;
  color: var(--text-dim);
}

.checkbox-indicator {
  width: 18px;
  height: 18px;
  border-radius: 4px;
  border: 1.5px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
}

.engine-card.active .checkbox-indicator {
  background-color: var(--primary);
  border-color: var(--primary);
}

.engine-card.active .checkbox-indicator::after {
  content: "✓";
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
}

/* Options Row */
.options-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--border-color);
}

.option-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.option-label {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.select-control {
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.85rem;
  outline: none;
  cursor: pointer;
}

.select-control:focus {
  border-color: var(--primary);
}

.engine-quick-actions {
  display: flex;
  gap: 0.5rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  padding: 0.65rem 1.4rem;
  cursor: pointer;
  border: none;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.btn-sm {
  padding: 0.45rem 0.9rem;
  font-size: 0.82rem;
  border-radius: var(--radius-sm);
}

.btn-xs {
  padding: 0.3rem 0.6rem;
  font-size: 0.75rem;
  border-radius: var(--radius-sm);
}

.btn-primary {
  background-color: var(--primary);
  color: #ffffff;
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  box-shadow: 0 4px 12px var(--primary-glow);
}

.btn-outline {
  background-color: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
}

.btn-outline:hover {
  background-color: var(--bg-card-hover);
  color: var(--text-main);
  border-color: var(--primary);
}

.alert-warning {
  background-color: rgba(245, 158, 11, 0.1);
  border: 1px solid var(--accent-amber);
  color: var(--accent-amber);
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
}

/* Progress Section */
.progress-card {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.progress-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.progress-title-wrap {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.pulse-indicator {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--accent-cyan);
  animation: pulseAnim 1.5s infinite;
}

@keyframes pulseAnim {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(6, 182, 212, 0.7); }
  70% { transform: scale(1.1); box-shadow: 0 0 0 8px rgba(6, 182, 212, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(6, 182, 212, 0); }
}

.progress-percent {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-cyan);
}

.progress-bar-container {
  height: 6px;
  background-color: var(--bg-input);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--accent-cyan));
  transition: width 0.3s ease;
}

.engine-progress-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.engine-progress-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
}

.engine-progress-badge.done {
  border-color: var(--accent-emerald);
  color: var(--accent-emerald);
}

/* Report Section */
.report-card-section {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.report-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 1rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1.25rem;
}

.report-status-badge {
  display: inline-block;
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  margin-bottom: 0.4rem;
}

.report-title-area h2 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.report-meta-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.meta-tag {
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-dim);
  font-size: 0.75rem;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
}

.report-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* Tabs */
.tabs-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.75rem;
}

.tab-buttons {
  display: flex;
  gap: 0.5rem;
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.5rem 0.9rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: all 0.15s;
}

.tab-btn:hover {
  color: var(--text-main);
  background-color: var(--bg-input);
}

.tab-btn.active {
  color: var(--primary);
  background-color: var(--selection-bg);
  font-weight: 600;
}

.filter-input {
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  outline: none;
  width: 180px;
}

.filter-input:focus {
  border-color: var(--primary);
}

/* Tab Contents */
.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* Findings List (Interactive Stream) */
.findings-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.finding-item {
  display: flex;
  align-items: flex-start;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.9rem 1rem;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
  transition: all 0.2s ease;
}

.finding-item:hover {
  border-color: var(--primary);
  background-color: var(--bg-card-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.finding-item:hover .finding-summary-text {
  color: var(--primary);
}

body.theme-light .finding-item:hover .finding-summary-text {
  color: var(--primary-hover);
}

.finding-content {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.finding-header-line {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.destination-url {
  color: var(--accent-cyan);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 100%;
}

.finding-summary-text {
  color: var(--text-main);
  font-size: 0.95rem;
  line-height: 1.5;
  word-break: break-word;
  transition: color 0.15s ease;
}

.finding-summary-text strong.highlight {
  background-color: var(--selection-bg);
  color: var(--primary);
  padding: 0 3px;
  border-radius: 2px;
}
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  flex-shrink: 0;
}

.destination-url {
  color: var(--accent-cyan);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 100%;
}

.destination-url:hover {
  text-decoration: underline;
  color: var(--primary);
}

.source-badge {
  display: inline-block;
  padding: 0.2rem 0.55rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  flex-shrink: 0;
}
  flex-shrink: 0;
}

.source-badge.Google { background: rgba(234, 67, 53, 0.15); color: #ea4335; border: 1px solid rgba(234, 67, 53, 0.3); }
.source-badge.Bing { background: rgba(0, 131, 115, 0.15); color: #00a693; border: 1px solid rgba(0, 131, 115, 0.3); }
.source-badge.DuckDuckGo { background: rgba(222, 88, 51, 0.15); color: #de5833; border: 1px solid rgba(222, 88, 51, 0.3); }
.source-badge.Wikipedia { background: rgba(148, 163, 184, 0.15); color: #cbd5e1; border: 1px solid rgba(148, 163, 184, 0.3); }
.source-badge.HackerNews { background: rgba(255, 102, 0, 0.15); color: #ff7700; border: 1px solid rgba(255, 102, 0, 0.3); }
.source-badge.GitHub { background: rgba(255, 255, 255, 0.12); color: #f1f5f9; border: 1px solid rgba(255, 255, 255, 0.25); }
.source-badge.OpenAlex { background: rgba(139, 92, 246, 0.15); color: #a78bfa; border: 1px solid rgba(139, 92, 246, 0.3); }
.source-badge.Yahoo { background: rgba(96, 1, 210, 0.15); color: #9f7aea; border: 1px solid rgba(96, 1, 210, 0.3); }
.source-badge.Brave { background: rgba(251, 84, 43, 0.15); color: #fb542b; border: 1px solid rgba(251, 84, 43, 0.3); }
.source-badge.arXiv { background: rgba(179, 27, 27, 0.15); color: #f87171; border: 1px solid rgba(179, 27, 27, 0.3); }
.source-badge.Ecosia { background: rgba(0, 133, 117, 0.15); color: #10b981; border: 1px solid rgba(0, 133, 117, 0.3); }

.finding-text {
  color: var(--text-main);
  word-break: break-word;
}

.finding-text strong.highlight {
  background-color: var(--selection-bg);
  color: var(--primary);
  padding: 0 3px;
  border-radius: 2px;
}

.finding-link-action {
  flex-shrink: 0;
}

.link-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background-color: transparent;
  color: var(--primary);
  text-decoration: none;
  font-size: 0.8rem;
  font-weight: 500;
  padding: 0.3rem 0.6rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: all 0.15s;
}

.link-btn:hover {
  background-color: var(--selection-bg);
  border-color: var(--primary);
}

/* Raw One-Line Output Tab */
.raw-box-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.raw-info {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.raw-info code {
  font-family: var(--font-mono);
  background: var(--bg-input);
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  color: var(--accent-cyan);
}

.raw-output-textarea {
  width: 100%;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-main);
  line-height: 1.6;
  resize: vertical;
  outline: none;
  white-space: pre;
  overflow-x: auto;
}

.raw-output-textarea:focus {
  border-color: var(--primary);
}

/* Grouped Engine Container */
.grouped-engine-container {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.engine-group-card {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
}

.engine-group-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

.engine-group-title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.1rem;
  font-weight: 600;
}

.engine-group-count {
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* Direct Links Box */
.direct-search-links-box {
  background-color: var(--bg-input);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.direct-links-title {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

.direct-links-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.direct-chip-link {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.78rem;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  transition: all 0.15s;
}

.direct-chip-link:hover {
  color: var(--primary);
  border-color: var(--primary);
}

/* Empty State */
.empty-state-card {
  text-align: center;
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.7rem;
  box-shadow: none;
}

.empty-state-icon {
  color: var(--text-dim);
  background: var(--bg-input);
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.empty-state-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
}

.empty-state-card p {
  max-width: 550px;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Footer */
.app-footer {
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-card);
  margin-top: auto;
}

.footer-container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 1.5rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.footer-sub {
  margin-top: 0.35rem;
  font-size: 0.78rem;
}

.footer-sub code {
  font-family: var(--font-mono);
  color: var(--accent-cyan);
}

/* Toast */
.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background-color: #10b981;
  color: #ffffff;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  transition: all 0.3s ease;
  transform: translateY(0);
}

.toast.hidden {
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
}

.hidden {
  display: none !important;
}

/* Spinner */
.btn-spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: #ffffff;
  animation: spin 0.8s linear infinite;
  display: inline-block;
}

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

/* Responsive */
@media (max-width: 768px) {
  .main-content {
    padding: 1rem;
  }
  .card {
    padding: 1.25rem;
  }
  .search-input-wrapper {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 0.5rem;
    padding: 0.5rem;
  }
  .search-icon {
    display: none;
  }
  .search-input {
    grid-column: 1 / -1;
    min-height: 46px;
    padding: 0.65rem 2.5rem 0.65rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
  }
  .clear-btn.visible {
    position: absolute;
    top: 0.8rem;
    right: 0.8rem;
  }
  .submit-btn {
    grid-column: 1 / -1;
    margin-top: 0;
    width: 100%;
  }
  .engine-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .finding-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
  .tabs-bar {
    flex-direction: column;
    align-items: stretch;
  }
  .tab-filter-box {
    width: 100%;
  }
  .filter-input {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .header-container {
    padding: 0.75rem 1rem;
  }
  .logo-icon {
    width: 38px;
    height: 38px;
  }
  .main-content {
    padding: 1rem;
  }
  .card {
    padding: 1rem;
  }
  .search-card {
    padding: 0.25rem 0;
  }
  .engine-grid {
    grid-template-columns: 1fr;
  }
  .engine-selection-header {
    align-items: flex-start;
    gap: 0.75rem;
  }
  .engine-counter-badge {
    white-space: nowrap;
  }
  .options-row,
  .option-item,
  .engine-quick-actions {
    align-items: stretch;
    width: 100%;
  }
  .option-item,
  .engine-quick-actions {
    flex-wrap: wrap;
  }
  .select-control {
    flex: 1;
    min-width: 0;
  }
  .engine-quick-actions .btn {
    flex: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}