:root {
  --bg-primary: #090e1a;
  --bg-surface: #111827;
  --bg-surface-elevated: #1f2937;
  --bg-input: #0f172a;
  --border-color: #374151;
  --border-focus: #e11d48;
  --text-primary: #f9fafb;
  --text-secondary: #d1d5db;
  --text-muted: #9ca3af;
  --accent-primary: #e11d48;
  --accent-primary-hover: #be123c;
  --accent-primary-active: #9f1239;
  --status-queued: #6b7280;
  --status-downloading: #38bdf8;
  --status-muxing: #f59e0b;
  --status-completed: #10b981;
  --status-failed: #ef4444;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --transition-fast: 0.15s ease-in-out;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.hidden {
  display: none !important;
}

/* Макет */
.app-layout {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Шапка (Navbar) */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background-color: var(--accent-primary);
  color: #fff;
  border-radius: var(--radius-sm);
  font-size: 14px;
  user-select: none;
}

.brand-titles {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.brand-titles h1 {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 2px 8px;
  border-radius: 9999px;
  background-color: rgba(225, 29, 72, 0.15);
  color: #fb7185;
  border: 1px solid rgba(225, 29, 72, 0.3);
}

.navbar-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.connection-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
  transition: background-color var(--transition-fast);
}

.status-connected {
  background-color: var(--status-completed);
  box-shadow: 0 0 8px var(--status-completed);
}

.status-connecting {
  background-color: var(--status-muxing);
  box-shadow: 0 0 8px var(--status-muxing);
}

.status-disconnected {
  background-color: var(--status-failed);
  box-shadow: 0 0 8px var(--status-failed);
}

/* Контент */
.main-content {
  flex: 1;
  max-width: 960px;
  width: 100%;
  margin: 0 auto;
  padding: 32px 20px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.section-header {
  margin-bottom: 20px;
}

.section-header h2 {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.text-sm {
  font-size: 13px;
}

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

/* Формы и поля */
.form-group {
  margin-bottom: 16px;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.input-control,
.textarea-control {
  width: 100%;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 14px;
  padding: 12px 14px;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.textarea-control {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  resize: vertical;
  min-height: 120px;
}

.input-control:focus,
.textarea-control:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 2px rgba(225, 29, 72, 0.25);
}

.textarea-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 8px;
  font-size: 13px;
  color: var(--text-muted);
}

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

.field-error {
  color: var(--status-failed);
  font-size: 12px;
  margin-top: 6px;
}

/* Переключатели форматов (Segmented Control) */
.options-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.segmented-control {
  display: grid;
  grid-template-columns: 1fr 1fr;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 3px;
  gap: 3px;
}

.segmented-option {
  cursor: pointer;
  user-select: none;
}

.segmented-option input {
  display: none;
}

.segment-pill {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.segmented-option:hover .segment-pill {
  color: var(--text-primary);
}

.segmented-option input:checked + .segment-pill {
  background-color: var(--bg-surface-elevated);
  color: #fff;
  font-weight: 600;
  border: 1px solid var(--border-color);
}

/* Кнопки */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-weight: 500;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), opacity var(--transition-fast);
}

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

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

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

.btn-primary:hover:not(:disabled) {
  background-color: var(--accent-primary-hover);
}

.btn-primary:active:not(:disabled) {
  background-color: var(--accent-primary-active);
}

.btn-secondary {
  background-color: var(--bg-surface-elevated);
  color: var(--text-secondary);
  border-color: var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
  background-color: #374151;
  color: var(--text-primary);
}

.btn-ghost {
  background-color: transparent;
  color: var(--text-muted);
}

.btn-ghost:hover {
  background-color: var(--bg-surface-elevated);
  color: var(--text-primary);
}

.btn-sm {
  font-size: 12px;
  padding: 6px 10px;
}

.btn-lg {
  font-size: 15px;
  padding: 12px 24px;
}

.btn-block {
  width: 100%;
}

.btn-counter {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  border-radius: 9999px;
  background-color: rgba(255, 255, 255, 0.2);
  font-size: 11px;
  font-weight: 700;
}

.submit-row {
  display: flex;
  justify-content: flex-end;
}

/* Очередь загрузок */
.queue-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 16px;
}

.queue-stats {
  display: flex;
  gap: 8px;
}

.stat-badge {
  font-size: 12px;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
}

.stat-active {
  color: var(--status-downloading);
  border-color: rgba(56, 189, 248, 0.3);
}

.queue-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 16px;
}

/* Элемент задачи в очереди */
.queue-item {
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color var(--transition-fast);
}

.queue-item:hover {
  border-color: #4b5563;
}

.queue-item-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.queue-item-meta {
  display: flex;
  align-items: center;
  gap: 8px;
}

.item-icon {
  font-size: 18px;
}

.item-title {
  font-size: 14px;
  font-weight: 600;
  word-break: break-word;
  color: var(--text-primary);
}

.item-url {
  font-size: 12px;
  color: var(--text-muted);
  word-break: break-all;
  font-family: var(--font-mono);
}

.item-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.badge-queued {
  background-color: rgba(107, 114, 128, 0.2);
  color: #9ca3af;
  border: 1px solid #4b5563;
}

.badge-downloading {
  background-color: rgba(56, 189, 248, 0.2);
  color: #38bdf8;
  border: 1px solid rgba(56, 189, 248, 0.4);
}

.badge-muxing {
  background-color: rgba(245, 158, 11, 0.2);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.4);
}

.badge-completed {
  background-color: rgba(16, 185, 129, 0.2);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.4);
}

.badge-failed {
  background-color: rgba(239, 68, 68, 0.2);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.4);
}

/* Прогресс-бар */
.progress-container {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.progress-track {
  width: 100%;
  height: 6px;
  background-color: #1f2937;
  border-radius: 9999px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  width: 0%;
  background-color: var(--accent-primary);
  border-radius: 9999px;
  transition: width 0.3s ease;
}

.progress-bar-fill.fill-completed {
  background-color: var(--status-completed);
}

.progress-bar-fill.fill-muxing {
  background-color: var(--status-muxing);
}

.progress-info {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-muted);
}

.queue-item-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 8px;
  border-top: 1px solid #1f2937;
  font-size: 12px;
}

.dest-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--text-muted);
}

.item-buttons {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-download-file {
  background-color: #065f46;
  color: #34d399;
  border: 1px solid #059669;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-size: 12px;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: background-color var(--transition-fast);
}

.btn-download-file:hover {
  background-color: #047857;
  color: #fff;
}

.item-error-text {
  color: var(--status-failed);
  font-size: 12px;
  background-color: rgba(239, 68, 68, 0.1);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

/* Пустое состояние */
.empty-state {
  text-align: center;
  padding: 48px 20px;
}

.empty-icon {
  font-size: 36px;
  margin-bottom: 12px;
  opacity: 0.7;
}

.empty-state h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
}

/* Модальное окно */
.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 1000;
}

.modal-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  max-width: 400px;
  width: 100%;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
}

.modal-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.modal-header h2 {
  font-size: 18px;
  font-weight: 700;
}

.modal-desc {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Подвал */
.footer {
  border-top: 1px solid var(--border-color);
  padding: 20px;
  margin-top: auto;
}

.footer-content {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-muted);
}

@media (max-width: 640px) {
  .navbar {
    padding: 12px 16px;
  }
  .main-content {
    padding: 16px 12px;
  }
  .options-grid {
    grid-template-columns: 1fr;
  }
  .submit-row {
    justify-content: stretch;
  }
  .submit-row .btn {
    width: 100%;
  }
  .footer-content {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}