:root {
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
  --bg-app: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.85);
  --border: rgba(226, 232, 240, 0.8);
  --border-hover: #cbd5e1;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --accent: #6366f1;
  --accent-hover: #4f46e5;
  --accent-soft: #f0f2ff;
  --danger: #ef4444;
  --danger-soft: #fee2e2;
  --danger-hover: #dc2626;
  --success: #10b981;
  --success-soft: #d1fae5;
  --warning: #f59e0b;
  --warning-soft: #fef3c7;
  --warning-hover: #d97706;
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.05), 0 1px 2px -1px rgb(0 0 0 / 0.05);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.05), 0 4px 6px -4px rgb(0 0 0 / 0.05);
}

[data-theme="dark"] {
  --bg-app: #090d16;
  --bg-card: rgba(17, 24, 39, 0.75);
  --border: rgba(31, 41, 55, 0.8);
  --border-hover: #374151;
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --accent: #818cf8;
  --accent-hover: #6366f1;
  --accent-soft: rgba(99, 102, 241, 0.15);
  --danger: #f87171;
  --danger-soft: rgba(239, 68, 68, 0.15);
  --danger-hover: #ef4444;
  --success: #34d399;
  --success-soft: rgba(52, 211, 153, 0.15);
  --warning: #fbbf24;
  --warning-soft: rgba(245, 158, 11, 0.15);
  --warning-hover: #f59e0b;
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.3), 0 1px 2px -1px rgb(0 0 0 / 0.3);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4), 0 4px 6px -4px rgb(0 0 0 / 0.4);
}

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

body {
  background-color: var(--bg-app);
  background-image: radial-gradient(at 0% 0%, hsla(253,16%,7%,0) 0, transparent 50%), radial-gradient(at 50% 0%, hsla(225,39%,30%,0.05) 0, transparent 50%), radial-gradient(at 100% 0%, hsla(339,49%,30%,0.05) 0, transparent 50%);
  color: var(--text-main);
  font-family: var(--font-sans);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.5;
}

header {
  background-color: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}

.logo-container {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-icon {
  background: linear-gradient(135deg, #818cf8, #6366f1);
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.15rem;
  box-shadow: 0 4px 6px -1px rgba(99, 102, 241, 0.3);
}

h1, h2, h3 {
  font-weight: 600;
  color: var(--text-main);
}

.title-text {
  font-size: 1.25rem;
  letter-spacing: -0.025em;
}

main {
  content-visibility: auto;
  contain-intrinsic-size: auto 500px;
  flex: 1;
  width: 100%;
  max-width: 960px;
  margin: 2rem auto;
  padding: 0 1.5rem;
}

.card {
  content-visibility: auto;
  contain-intrinsic-size: auto 200px;
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 1.75rem;
  box-shadow: var(--shadow-lg);
  margin-bottom: 1.5rem;
}

/* Form Styles */
.form-group {
  margin-bottom: 1.25rem;
}

label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--text-main);
  font-size: 0.875rem;
}

input, select {
  width: 100%;
  padding: 0.65rem 0.85rem;
  border-radius: 0.5rem;
  border: 1px solid var(--border);
  background-color: var(--bg-app);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 0.925rem;
}

input:focus, select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.65rem 1.25rem;
  border-radius: 0.5rem;
  font-weight: 500;
  font-size: 0.9rem;
  cursor: pointer;
  border: none;
  text-decoration: none;
}

.btn:active {
  transform: scale(0.96);
}

.btn[disabled],
.btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.spinner {
  display: inline-block;
  width: 1rem;
  height: 1rem;
  border: 2px solid rgba(255, 255, 255, 0.5);
  border-top-color: rgba(255, 255, 255, 1);
  border-radius: 999px;
  animation: spin 0.8s linear infinite;
}

.btn-secondary .spinner {
  border-color: rgba(15, 23, 42, 0.25);
  border-top-color: rgba(15, 23, 42, 0.7);
}

[data-theme="dark"] .btn-secondary .spinner {
  border-color: rgba(243, 244, 246, 0.25);
  border-top-color: rgba(243, 244, 246, 0.7);
}

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

.btn-primary {
  background-color: var(--accent);
  color: white;
  box-shadow: 0 4px 6px -1px var(--accent-soft);
}

.btn-secondary {
  background-color: var(--bg-app);
  color: var(--text-main);
  border: 1px solid var(--border);
}

.btn-danger {
  background-color: var(--danger-soft);
  color: var(--danger);
}

.btn-warning {
  background-color: var(--warning-soft);
  color: var(--warning);
}

/* Theme Toggle */
.theme-toggle-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-main);
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 0.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle-btn svg {
  width: 1.15rem;
  height: 1.15rem;
}

[data-theme="light"] .dark-icon { display: block; }
[data-theme="light"] .light-icon { display: none; }
[data-theme="dark"] .dark-icon { display: none; }
[data-theme="dark"] .light-icon { display: block; }

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
}

th {
  font-weight: 600;
  color: var(--text-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border);
  padding: 0.75rem 1rem;
  text-align: left;
}

td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
  font-size: 0.9rem;
}

tr:last-child td {
  border-bottom: none;
}

.actions-cell {
  display: flex;
  gap: 0.4rem;
  align-items: center;
}

/* Toast Notifications Container */
#toast-container {
  position: fixed;
  inset: auto 2rem 2rem auto;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  z-index: 1000;
  pointer-events: none;
  background: transparent;
  border: none;
  margin: 0;
  padding: 0;
}

.toast {
  pointer-events: auto;
  background-color: var(--bg-card);
  color: var(--text-main);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  padding: 1rem 1.25rem;
  border-radius: 0.5rem;
  font-size: 0.9rem;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  transform: translateX(120%);
  opacity: 0;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.toast.show {
  transform: translateX(0);
  opacity: 1;
}

.toast.success {
  border-left-color: var(--success);
}
.toast.success svg { color: var(--success); }

.toast.error {
  border-left-color: var(--danger);
}
.toast.error svg { color: var(--danger); }

/* Hide old toast */
#toast { display: none; }

/* Folders */
.folder-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.folder-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  background-color: var(--bg-card);
  text-decoration: none;
  color: var(--text-main);
  font-weight: 500;
  font-size: 0.9rem;
}

.folder-icon {
  color: var(--accent);
  display: flex;
  align-items: center;
}

.file-name-cell {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.file-link {
  text-decoration: none;
  color: var(--text-main);
  font-weight: 500;
}

/* Tabs styling */
.tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.5rem;
  gap: 0.5rem;
}

.tab-btn {
  flex: 1;
  padding: 0.75rem 1rem;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.tab-btn.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.error-card {
  border-color: var(--danger);
  color: var(--danger);
  background-color: var(--danger-soft);
}

.error-card--config {
  margin-bottom: 1.5rem;
}

.error-card-title {
  margin-bottom: 0.5rem;
  color: var(--danger);
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.error-card-message {
  font-size: 0.9rem;
}

.quick-links {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: 1rem;
}

.file-input-wrapper {
  position: relative;
  border: 2px dashed var(--border);
  border-radius: 0.75rem;
  padding: 2.5rem 1.5rem;
  text-align: center;
  background-color: var(--bg-app);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
}

.file-input-wrapper.dragover {
  border-color: var(--accent);
  background-color: var(--accent-soft);
  transform: scale(1.02);
}

.file-input-wrapper input[type="file"] {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
  z-index: 10;
}

.file-input-icon {
  color: var(--accent);
  width: 2.5rem;
  height: 2.5rem;
  margin-bottom: 0.5rem;
}

.file-input-text {
  color: var(--text-main);
  font-size: 1rem;
  font-weight: 500;
}

.file-input-subtext {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* Selected Files Preview List */
.selected-files-list {
  margin-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  text-align: left;
}

.selected-file-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  font-size: 0.85rem;
}

.selected-file-name {
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 200px;
}

/* Upload Progress Bar */
.progress-container {
  width: 100%;
  background-color: var(--bg-app);
  border-radius: 999px;
  height: 0.5rem;
  margin-top: 1rem;
  overflow: hidden;
  border: 1px solid var(--border);
  display: none;
}

.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-hover));
  width: 0%;
}

.progress-text {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
  text-align: center;
  display: none;
}

/* Success Screen */
.success-card {
  text-align: center;
  padding: 3rem 2rem;
}

.success-icon {
  background-color: var(--success-soft);
  color: var(--success);
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  margin: 0 auto 1.5rem;
}

.success-link-box {
  background-color: var(--bg-app);
  border: 1px solid var(--border);
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  font-family: monospace;
  font-size: 0.85rem;
  word-break: break-all;
  margin: 1.5rem 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.success-link-text {
  color: var(--accent);
  text-align: left;
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

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

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.55rem;
  border-radius: 0.25rem;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  background-color: var(--accent-soft);
  color: var(--accent);
}

.btn-submit {
  width: 100%;
}

.btn-submit[disabled] {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Pagination */
.pagination-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 1rem;
  flex-wrap: wrap;
  gap: 0.75rem;
}

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

.per-page-select {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.per-page-select select {
  width: auto;
  padding: 0.35rem 0.65rem;
  font-size: 0.85rem;
  border-radius: 0.4rem;
  border: 1px solid var(--border);
  background-color: var(--bg-card);
  color: var(--text-main);
  cursor: pointer;
}

.pagination-controls {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
}

.pagination-controls .page-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.25rem;
  height: 2.25rem;
  padding: 0 0.5rem;
  border-radius: 0.4rem;
  border: 1px solid var(--border);
  background-color: var(--bg-card);
  color: var(--text-main);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
}

.pagination-controls .page-btn.active {
  background-color: var(--accent);
  border-color: var(--accent);
  color: white;
}

.pagination-controls .page-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

.pagination-controls .page-ellipsis {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.25rem;
  height: 2.25rem;
  color: var(--text-muted);
  font-size: 0.85rem;
}

@media (max-width: 768px) {
  header {
    padding: 0.75rem 1.25rem;
  }
  main {
    margin: 1rem auto;
  }
  .card {
    padding: 1.25rem;
  }
  .pagination-bar {
    flex-direction: column;
    align-items: flex-start;
  }
  .pagination-controls .page-btn {
    min-width: 2rem;
    height: 2rem;
    font-size: 0.8rem;
  }
}

/* Dialog & Popover Styles */
dialog {
  margin: auto;
}
dialog::backdrop {
  background-color: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
}
/* For popover toasts */
[popover] {
  border: none;
  background: none;
  padding: 0;
  margin: 0;
}