:root {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --border-color: #475569;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --accent-blue: #2563eb;
  --accent-indigo: #6366f1;
  --accent-cyan: #06b6d4;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header {
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.025em;
}

.brand-icon {
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
  color: white;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.badge-version {
  background-color: rgba(37, 99, 235, 0.2);
  color: #60a5fa;
  border: 1px solid rgba(37, 99, 235, 0.4);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
}

nav.tabs {
  display: flex;
  gap: 0.5rem;
  background-color: rgba(15, 23, 42, 0.6);
  padding: 0.25rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.875rem;
  padding: 0.45rem 1rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s ease;
}

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

.tab-btn.active {
  background-color: var(--accent-blue);
  color: white;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

main {
  flex: 1;
  padding: 1.5rem 2rem;
  max-width: 1600px;
  width: 100%;
  margin: 0 auto;
}

.view-panel {
  display: none;
}

.view-panel.active {
  display: block;
}

/* Studio Layout */
.studio-grid {
  display: grid;
  grid-template-columns: 420px 1fr;
  gap: 1.5rem;
  height: calc(100vh - 120px);
}

.card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.card-header {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.form-group {
  margin-bottom: 1rem;
}

label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

input[type="text"], input[type="url"], textarea {
  width: 100%;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  padding: 0.65rem 0.85rem;
  font-size: 0.9rem;
  transition: border-color 0.15s;
}

input:focus, textarea:focus {
  outline: none;
  border-color: var(--accent-blue);
}

textarea {
  font-family: monospace;
  resize: vertical;
}

.toggles-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.toggle-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.825rem;
  cursor: pointer;
  user-select: none;
  background-color: rgba(15, 23, 42, 0.4);
  padding: 0.5rem 0.65rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(71, 85, 105, 0.4);
  transition: all 0.15s;
}

.toggle-label:hover {
  background-color: rgba(15, 23, 42, 0.8);
}

.toggle-label input[type="checkbox"] {
  accent-color: var(--accent-blue);
  width: 15px;
  height: 15px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-blue), #1d4ed8);
  border: none;
  color: white;
  font-weight: 600;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-size: 0.95rem;
  transition: opacity 0.15s;
}

.btn-primary:hover {
  opacity: 0.92;
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Results Workspace */
.results-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.75rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.output-actions {
  display: flex;
  gap: 0.35rem;
  align-items: center;
}

.action-btn {
  background: var(--bg-tertiary);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  transition: all 0.15s ease;
}

.action-btn:hover {
  background: var(--accent-blue);
  border-color: var(--accent-blue);
  color: white;
}

.action-btn-save {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border-color: rgba(16, 185, 129, 0.35);
}

.action-btn-save:hover {
  background: #059669 !important;
  border-color: #059669 !important;
  color: #ffffff !important;
}

.action-btn-folder {
  background: rgba(59, 130, 246, 0.15);
  color: #60a5fa;
  border-color: rgba(59, 130, 246, 0.35);
}

.action-btn-folder:hover {
  background: #2563eb !important;
  border-color: #2563eb !important;
  color: #ffffff !important;
}

.action-btn.copied {
  background: rgba(16, 185, 129, 0.25) !important;
  color: #34d399 !important;
  border-color: #34d399 !important;
}

/* Quick Extraction Profiles Bar */
.presets-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
  background: rgba(15, 23, 42, 0.6);
  padding: 0.6rem 0.85rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

.presets-label {
  font-size: 0.775rem;
  font-weight: 700;
  color: var(--accent-cyan);
}

.preset-pill {
  background: var(--bg-secondary);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: all 0.15s ease;
}

.preset-pill:hover {
  background: var(--border-color);
  border-color: #60a5fa;
}

.preset-pill.active {
  background: rgba(37, 99, 235, 0.25);
  color: #60a5fa;
  border-color: var(--accent-blue);
  box-shadow: 0 0 10px rgba(37, 99, 235, 0.3);
}

/* Filters Card (Targeting & Pruning) */
.filters-card {
  background: rgba(15, 23, 42, 0.45);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.85rem;
  margin-bottom: 1rem;
}

.filters-header {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-cyan);
  margin-bottom: 0.65rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.chip-btn {
  background: var(--bg-tertiary);
  color: var(--text-muted);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.2rem 0.5rem;
  font-size: 0.725rem;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s ease;
}

.chip-btn:hover {
  background: var(--accent-blue);
  color: white;
  border-color: var(--accent-blue);
}

.subtabs {
  display: flex;
  gap: 0.35rem;
}

.subtab-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  font-size: 0.825rem;
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: 600;
}

.subtab-btn.active {
  background-color: var(--bg-tertiary);
  color: var(--text-main);
  border-color: var(--border-color);
}

.output-container {
  flex: 1;
  overflow-y: auto;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
  font-size: 0.9rem;
}

pre.code-block {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  white-space: pre-wrap;
  word-break: break-word;
  color: #cbd5e1;
}

.meta-bar {
  display: flex;
  gap: 1rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.meta-pill {
  background-color: var(--bg-tertiary);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  color: #e2e8f0;
}

/* Chunks list styling */
.chunk-item {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.85rem;
  margin-bottom: 0.75rem;
}

.chunk-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--accent-cyan);
  font-weight: 600;
  margin-bottom: 0.4rem;
}

/* Link graph & Media styling */
.table-container {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

th, td {
  padding: 0.65rem 0.85rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

th {
  background-color: var(--bg-tertiary);
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.75rem;
}

.badge {
  display: inline-block;
  font-size: 0.725rem;
  font-weight: 600;
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-sm);
}

.badge-internal { background-color: rgba(37, 99, 235, 0.2); color: #60a5fa; border: 1px solid rgba(37, 99, 235, 0.3); }
.badge-external { background-color: rgba(16, 185, 129, 0.2); color: #34d399; border: 1px solid rgba(16, 185, 129, 0.3); }

.media-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
}

.media-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.media-preview {
  height: 140px;
  background-color: #020617;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.media-preview img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.media-info {
  padding: 0.75rem;
  font-size: 0.8rem;
}

/* Search Highlights */
mark {
  background-color: rgba(245, 158, 11, 0.35);
  color: #fbbf24;
  padding: 0.1rem 0.25rem;
  border-radius: 2px;
}

/* Toast Notifications Container */
#toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-width: 520px;
  width: calc(100vw - 3rem);
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  background: rgba(30, 41, 59, 0.96);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.4);
  padding: 1rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  animation: slideInRight 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  color: var(--text-main);
  user-select: text;
}

.toast-error {
  border-left: 5px solid var(--accent-rose);
}

.toast-success {
  border-left: 5px solid var(--accent-emerald);
}

.toast-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  font-size: 0.9rem;
}

.toast-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.toast-close {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1.25rem;
  line-height: 1;
  padding: 0 0.25rem;
}

.toast-close:hover {
  color: var(--text-main);
}

.toast-body {
  font-size: 0.825rem;
  color: var(--text-main);
  word-break: break-word;
  max-height: 160px;
  overflow-y: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  background: rgba(15, 23, 42, 0.85);
  padding: 0.6rem 0.8rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.08);
  user-select: text;
}

.toast-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
}

.toast-btn {
  background: var(--bg-tertiary);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-sm);
  font-size: 0.775rem;
  font-weight: 500;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: all 0.15s ease;
}

.toast-btn:hover {
  background: var(--border-color);
}

.toast-btn.copied {
  background: rgba(16, 185, 129, 0.25) !important;
  color: #34d399 !important;
  border-color: #34d399 !important;
}

/* In-Panel Error Card */
.error-card {
  background: rgba(244, 63, 94, 0.06);
  border: 1px solid rgba(244, 63, 94, 0.35);
  border-left: 5px solid var(--accent-rose);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.error-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
}

.error-card-title {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 1.1rem;
  font-weight: 700;
  color: #f87171;
}

.error-advice-box {
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid rgba(96, 165, 250, 0.3);
  border-radius: var(--radius-sm);
  padding: 1rem;
  font-size: 0.85rem;
  line-height: 1.6;
  color: #e2e8f0;
}

.error-advice-box strong {
  color: #60a5fa;
}

.error-raw-box {
  background: #020617;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 1rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.8rem;
  color: #fca5a5;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 250px;
  overflow-y: auto;
  user-select: text;
}

@keyframes slideInRight {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}