/* ==========================================================================
   VK Video Downloader - Clean & Neutral Design System
   ========================================================================== */

:root {
  /* Neutral Color Palette */
  --bg-body: #f8fafc;
  --bg-card: #ffffff;
  --bg-subtle: #f1f5f9;
  --bg-hover: #e2e8f0;

  /* Primary Accent Colors (Neutral Modern Blue) */
  --primary-color: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: #eff6ff;

  /* Status Colors */
  --success-color: #10b981;
  --success-hover: #059669;
  --success-light: #ecfdf5;

  --danger-color: #ef4444;
  --danger-hover: #dc2626;
  --danger-light: #fef2f2;

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-light: #94a3b8;

  --border-color: #e2e8f0;
  --border-focus: #2563eb;

  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);

  --transition: 0.15s ease-in-out;
}

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

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

/* App Container */
.app-wrapper {
  max-width: 860px;
  margin: 0 auto;
  padding: 24px 20px 60px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* Header */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0 20px;
  border-bottom: 1px solid var(--border-color);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
}

.brand-logo-img {
  width: 40px;
  height: 40px;
  display: block;
}

.brand-text-block {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 1.35rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--primary-color);
  line-height: 1.1;
  text-transform: uppercase;
}

.brand-subtitle {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.icon-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
}

.icon-btn:hover {
  background: var(--bg-subtle);
  color: var(--text-primary);
  border-color: #cbd5e1;
}

.icon-btn.has-token::after {
  content: '';
  position: absolute;
  top: 6px;
  right: 6px;
  width: 8px;
  height: 8px;
  background: var(--success-color);
  border-radius: 50%;
}

/* Main Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

/* Hero & Input Section */
.hero-section {
  text-align: center;
  padding: 10px 0 6px;
}

.hero-title {
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.hero-title span {
  color: var(--primary-color);
}

.hero-subtitle {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 24px;
}

/* Input Form */
.input-form-card {
  background: var(--bg-card);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition);
}

.input-form-card:focus-within {
  border-color: var(--primary-color);
}

.input-field-icon {
  padding-left: 12px;
  color: var(--primary-color);
  display: flex;
  align-items: center;
}

.video-url-input {
  flex: 1;
  border: none;
  outline: none;
  font-family: inherit;
  font-size: 1rem;
  color: var(--text-primary);
  background: transparent;
  padding: 10px 6px;
}

.video-url-input::placeholder {
  color: var(--text-light);
}

.input-btn-group {
  display: flex;
  align-items: center;
  gap: 6px;
}

.btn-paste {
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  font-size: 0.85rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  transition: var(--transition);
}

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

.btn-fetch {
  background: var(--primary-color);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-md);
  padding: 10px 20px;
  font-size: 0.95rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  transition: background-color var(--transition);
  white-space: nowrap;
}

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

.btn-fetch:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Feature Badges */
.feature-badges {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 18px;
  flex-wrap: wrap;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-subtle);
  padding: 4px 10px;
  border-radius: var(--radius-full);
}

.badge svg {
  color: var(--primary-color);
}

/* Preview Section */
.preview-section {
  display: none;
  animation: fadeIn 0.2s ease-in-out;
}

.preview-section.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.preview-grid {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 24px;
}

.preview-thumb-box {
  position: relative;
  width: 100%;
  aspect-ratio: 16/9;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #000;
  border: 1px solid var(--border-color);
}

.preview-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.duration-badge {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0, 0, 0, 0.75);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 4px;
}

.preview-info {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 16px;
}

.video-author {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary-color);
  display: flex;
  align-items: center;
  gap: 6px;
}

.video-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.35;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-top: 4px;
}

.video-views {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Quality Selectors */
.quality-box {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.quality-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.quality-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.quality-pill {
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 8px 12px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 2px;
  transition: var(--transition);
}

.quality-pill:hover {
  border-color: #cbd5e1;
  background: var(--bg-hover);
}

.quality-pill.active {
  background: var(--primary-light);
  border-color: var(--primary-color);
}

.quality-pill .qp-name {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-primary);
}

.quality-pill.active .qp-name {
  color: var(--primary-color);
}

.quality-pill .qp-info {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.quality-pill.is-audio.active {
  background: var(--primary-light);
  border-color: var(--primary-color);
}

.quality-pill.is-audio.active .qp-name {
  color: var(--primary-color);
}

/* Actions */
.preview-action-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 6px;
}

.btn-primary-download {
  flex: 1;
  min-width: 200px;
  background: var(--primary-color);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-md);
  padding: 12px 20px;
  font-size: 0.95rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  cursor: pointer;
  transition: background-color var(--transition);
}

.btn-primary-download:hover {
  background: var(--primary-hover);
}

.btn-stream-link {
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  font-size: 0.9rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  text-decoration: none;
  transition: var(--transition);
}

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

/* Tasks & Active Downloads */
.tasks-container {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.section-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.count-pill {
  background: var(--primary-color);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 1px 8px;
  border-radius: var(--radius-full);
}

.task-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.task-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  box-shadow: var(--shadow-sm);
}

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

.task-item-left {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
  min-width: 0;
}

.task-thumb-img {
  width: 50px;
  height: 34px;
  border-radius: 4px;
  object-fit: cover;
  background: #e2e8f0;
  flex-shrink: 0;
}

.task-meta-group {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.task-title-text {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.task-submeta {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.status-badge {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 1px 6px;
  border-radius: 4px;
  text-transform: uppercase;
}

.status-downloading {
  background: var(--primary-light);
  color: var(--primary-color);
}

.status-processing {
  background: #fef3c7;
  color: #d97706;
}

.status-finished {
  background: var(--success-light);
  color: var(--success-color);
}

.status-error {
  background: var(--danger-light);
  color: var(--danger-color);
}

/* Progress bar */
.progress-wrap {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.progress-bar-bg {
  width: 100%;
  height: 6px;
  background: var(--bg-subtle);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: var(--primary-color);
  border-radius: var(--radius-full);
  width: 0%;
  transition: width 0.15s linear;
}

.progress-info {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.progress-info strong {
  color: var(--text-primary);
}

.btn-task-dl {
  background: var(--primary-color);
  color: #ffffff;
  border-radius: var(--radius-sm);
  padding: 5px 10px;
  font-size: 0.8rem;
  font-weight: 600;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.btn-task-del {
  background: transparent;
  border: none;
  color: var(--text-light);
  cursor: pointer;
  padding: 4px;
  border-radius: 4px;
  display: flex;
  align-items: center;
}

.btn-task-del:hover {
  color: var(--danger-color);
  background: var(--danger-light);
}

/* History / Empty states */
.empty-box {
  text-align: center;
  padding: 32px 20px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Modal */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 23, 42, 0.4);
  backdrop-filter: blur(4px);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}

.modal-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 480px;
  padding: 24px;
  box-shadow: var(--shadow-lg);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.modal-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-primary);
}

.form-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 16px;
}

.form-label {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-primary);
}

.form-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.form-input {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 8px 12px;
  font-family: inherit;
  font-size: 0.9rem;
  color: var(--text-primary);
  outline: none;
  background: #ffffff;
}

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

.token-input-group {
  display: flex;
  gap: 6px;
}

.token-input-group .form-input {
  flex: 1;
}

.btn-secondary {
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  padding: 8px 14px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

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

.status-msg {
  font-size: 0.8rem;
  margin-top: 4px;
  display: none;
}

.status-msg.success {
  color: var(--success-color);
  display: block;
}

.status-msg.error {
  color: var(--danger-color);
  display: block;
}

.modal-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

.btn-primary-modal {
  background: var(--primary-color);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-md);
  padding: 8px 18px;
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  transition: background-color var(--transition);
}

.btn-primary-modal:hover {
  background: var(--primary-hover);
}

/* Toast */
.toast-container {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--primary-color);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  color: var(--text-primary);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  font-weight: 500;
  pointer-events: auto;
  animation: fadeIn 0.2s ease-in-out;
  min-width: 260px;
  max-width: 380px;
}

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

.toast.info {
  border-left-color: var(--primary-color);
}

/* Spinner */
.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-top-color: #ffffff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  display: inline-block;
}

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

@media (max-width: 768px) {
  .preview-grid {
    grid-template-columns: 1fr;
  }
  .input-form-card {
    flex-direction: column;
    padding: 8px;
  }
  .input-btn-group {
    width: 100%;
    justify-content: space-between;
  }
  .btn-fetch {
    flex: 1;
    justify-content: center;
  }
}