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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  min-height: 100vh;
  color: #fff;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem;
}

header {
  text-align: center;
  margin-bottom: 2rem;
}

header h1 {
  font-size: 2.5rem;
  background: linear-gradient(90deg, #e94560, #0f3460);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.subtitle {
  color: #8892b0;
  margin-top: 0.5rem;
}

/* Tabs */
.tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 2rem;
  border-bottom: 2px solid #233554;
  padding-bottom: 0.5rem;
  flex-wrap: wrap;
}

.tab {
  padding: 0.75rem 1.5rem;
  background: transparent;
  border: none;
  color: #8892b0;
  cursor: pointer;
  font-size: 1rem;
  border-radius: 8px 8px 0 0;
  transition: all 0.3s ease;
}

.tab:hover {
  color: #e94560;
  background: rgba(233, 69, 96, 0.1);
}

.tab.active {
  color: #e94560;
  background: rgba(233, 69, 96, 0.2);
  border-bottom: 2px solid #e94560;
  margin-bottom: -2px;
}

/* Tab Content */
.tab-content {
  display: none;
  background: rgba(255, 255, 255, 0.05);
  padding: 2rem;
  border-radius: 12px;
  backdrop-filter: blur(10px);
}

.tab-content.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.tab-content h2 {
  margin-bottom: 1.5rem;
  color: #ccd6f6;
}

/* Forms */
.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: #8892b0;
  font-size: 0.9rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

@media (max-width: 600px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}

input[type="url"],
input[type="text"],
select {
  width: 100%;
  padding: 0.75rem 1rem;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid #233554;
  border-radius: 8px;
  color: #fff;
  font-size: 1rem;
  transition: all 0.3s ease;
}

input[type="url"]:focus,
input[type="text"]:focus,
select:focus {
  outline: none;
  border-color: #e94560;
  background: rgba(233, 69, 96, 0.1);
}

select option {
  background: #1a1a2e;
  color: #fff;
}

/* Buttons */
.btn {
  padding: 0.75rem 2rem;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-primary {
  background: linear-gradient(90deg, #e94560, #0f3460);
  color: #fff;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 20px rgba(233, 69, 96, 0.4);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: #ccd6f6;
  border: 1px solid #233554;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.2);
}

.btn-small {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  margin-left: 0.5rem;
}

.btn-loading {
  display: none;
}

.btn.loading .btn-text {
  display: none;
}

.btn.loading .btn-loading {
  display: inline;
}

/* Results */
.result {
  margin-top: 1.5rem;
  padding: 1rem;
  border-radius: 8px;
  display: none;
}

.result.show {
  display: block;
  animation: fadeIn 0.3s ease;
}

.result.success {
  background: rgba(16, 185, 129, 0.2);
  border: 1px solid #10b981;
}

.result.error {
  background: rgba(239, 68, 68, 0.2);
  border: 1px solid #ef4444;
}

.result h3 {
  margin-bottom: 0.75rem;
  font-size: 1.1rem;
}

.result ul {
  list-style: none;
  margin-top: 0.5rem;
}

.result li {
  padding: 0.5rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.result li:last-child {
  border-bottom: none;
}

.result .icon-success {
  color: #10b981;
}

.result .icon-error {
  color: #ef4444;
}

.result a {
  color: #e94560;
  text-decoration: none;
}

.result a:hover {
  text-decoration: underline;
}

.result .preview {
  margin-top: 1rem;
  padding: 1rem;
  background: rgba(0, 0, 0, 0.3);
  border-radius: 8px;
  font-family: monospace;
  font-size: 0.9rem;
  white-space: pre-wrap;
  max-height: 300px;
  overflow-y: auto;
}

/* Files Grid */
.files-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.file-card {
  background: rgba(255, 255, 255, 0.05);
  padding: 1rem;
  border-radius: 8px;
  border: 1px solid #233554;
  transition: all 0.3s ease;
}

.file-card:hover {
  border-color: #e94560;
  transform: translateY(-2px);
}

.file-card .file-name {
  font-weight: 600;
  margin-bottom: 0.5rem;
  word-break: break-all;
  color: #ccd6f6;
}

.file-card .file-type {
  font-size: 0.8rem;
  color: #8892b0;
  margin-bottom: 0.75rem;
}

.file-card .file-actions {
  display: flex;
  gap: 0.5rem;
}

.file-card .file-actions a {
  padding: 0.4rem 0.8rem;
  background: rgba(233, 69, 96, 0.2);
  color: #e94560;
  text-decoration: none;
  border-radius: 4px;
  font-size: 0.85rem;
  transition: all 0.3s ease;
}

.file-card .file-actions a:hover {
  background: #e94560;
  color: #fff;
}

/* Loading spinner */
@keyframes spin {
  to { transform: rotate(360deg); }
}

.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-right: 0.5rem;
}

/* Status indicator */
.status {
  display: inline-block;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-size: 0.8rem;
  margin-left: 0.5rem;
}

.status.downloading {
  background: rgba(59, 130, 246, 0.2);
  color: #3b82f6;
}

.status.transcribing {
  background: rgba(168, 85, 247, 0.2);
  color: #a855f7;
}

.status.complete {
  background: rgba(16, 185, 129, 0.2);
  color: #10b981;
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 3rem;
  color: #8892b0;
}

.empty-state p {
  margin-top: 1rem;
}

/* Progress Bar */
.progress-container {
  margin-top: 1.5rem;
  padding: 1.5rem;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 12px;
  border: 1px solid #233554;
}

.progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.progress-header #progress-title {
  font-weight: 600;
  color: #ccd6f6;
  font-size: 1rem;
}

.progress-header #progress-eta {
  color: #e94560;
  font-size: 0.9rem;
  font-weight: 500;
}

.progress-bar {
  width: 100%;
  height: 12px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 6px;
  overflow: hidden;
  position: relative;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #e94560, #ff6b8a);
  border-radius: 6px;
  width: 0%;
  transition: width 0.3s ease;
  position: relative;
}

.progress-fill::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.3),
    transparent
  );
  animation: shimmer 2s infinite;
}

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

.progress-details {
  display: flex;
  justify-content: space-between;
  margin-top: 0.75rem;
  font-size: 0.85rem;
  color: #8892b0;
}

.progress-details #progress-percent {
  color: #ccd6f6;
  font-weight: 600;
}

.progress-details #progress-speed {
  color: #10b981;
}

.progress-current {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.9rem;
  color: #8892b0;
}

.progress-current .video-title {
  color: #ccd6f6;
  font-weight: 500;
}

/* Drag and Drop Zone */
.drop-zone {
  border: 2px dashed #233554;
  border-radius: 12px;
  padding: 3rem 2rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s ease;
  margin-bottom: 1.5rem;
  background: rgba(255, 255, 255, 0.02);
}

.drop-zone:hover {
  border-color: #e94560;
  background: rgba(233, 69, 96, 0.05);
}

.drop-zone.drag-over {
  border-color: #e94560;
  background: rgba(233, 69, 96, 0.1);
  transform: scale(1.02);
}

.drop-zone-icon {
  color: #8892b0;
  margin-bottom: 1rem;
  transition: color 0.3s ease;
}

.drop-zone:hover .drop-zone-icon {
  color: #e94560;
}

.drop-zone-text {
  color: #ccd6f6;
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.drop-zone-hint {
  color: #8892b0;
  font-size: 0.9rem;
}

.drop-zone-formats {
  color: #64748b;
  font-size: 0.75rem;
  margin-top: 0.5rem;
  font-style: italic;
}

/* Selected Files List */
.selected-files {
  background: rgba(255, 255, 255, 0.05);
  border-radius: 8px;
  padding: 1rem;
  margin-bottom: 1.5rem;
}

.selected-files h3 {
  font-size: 0.9rem;
  color: #8892b0;
  margin-bottom: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.selected-files ul {
  list-style: none;
  margin-bottom: 1rem;
}

.selected-files li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  color: #ccd6f6;
}

.selected-files li:last-child {
  border-bottom: none;
}

.selected-files .file-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.selected-files .file-size {
  color: #8892b0;
  font-size: 0.85rem;
  margin-left: 1rem;
}

.selected-files .remove-file {
  background: none;
  border: none;
  color: #ef4444;
  cursor: pointer;
  padding: 0.25rem;
  margin-left: 0.5rem;
  font-size: 1.2rem;
  line-height: 1;
}

.selected-files .remove-file:hover {
  color: #ff6b6b;
}

/* Checkbox Group */
.checkbox-group {
  margin-bottom: 1rem;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  color: #ccd6f6;
  font-size: 0.95rem;
}

.checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: #e94560;
  cursor: pointer;
}

.translate-lang-select {
  margin-top: 0.75rem;
  width: auto;
  min-width: 150px;
}

.translate-lang-select:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Translate Tab */
.translate-mode-selector {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.mode-btn {
  padding: 0.6rem 1.25rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid #233554;
  color: #8892b0;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.95rem;
  transition: all 0.3s ease;
}

.mode-btn:hover {
  border-color: #e94560;
  color: #ccd6f6;
}

.mode-btn.active {
  background: rgba(233, 69, 96, 0.2);
  border-color: #e94560;
  color: #e94560;
}

.translate-mode {
  animation: fadeIn 0.3s ease;
}

/* Textarea */
textarea {
  width: 100%;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid #233554;
  border-radius: 8px;
  color: #fff;
  font-size: 1rem;
  font-family: inherit;
  resize: vertical;
  min-height: 150px;
  transition: all 0.3s ease;
}

textarea:focus {
  outline: none;
  border-color: #e94560;
  background: rgba(233, 69, 96, 0.1);
}

textarea::placeholder {
  color: #8892b0;
}

/* Translation Result */
.translation-output {
  margin-top: 1rem;
  padding: 1rem;
  background: rgba(0, 0, 0, 0.3);
  border-radius: 8px;
  white-space: pre-wrap;
  max-height: 400px;
  overflow-y: auto;
  color: #ccd6f6;
  line-height: 1.6;
}

/* Summarize Tab */
.summarize-mode-selector {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.summarize-mode {
  animation: fadeIn 0.3s ease;
}

/* Summary Result */
.summary-output {
  margin-top: 1rem;
  padding: 1rem;
  background: rgba(0, 0, 0, 0.3);
  border-radius: 8px;
  white-space: pre-wrap;
  max-height: 400px;
  overflow-y: auto;
  color: #ccd6f6;
  line-height: 1.6;
}

/* ==================== API CONFIGURATION PANEL ==================== */
.api-config-panel {
  background: rgba(233, 69, 96, 0.1);
  border: 1px solid rgba(233, 69, 96, 0.3);
  border-radius: 12px;
  margin-bottom: 2rem;
  overflow: hidden;
  transition: all 0.3s ease;
}

.config-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  cursor: pointer;
  user-select: none;
  transition: background 0.2s ease;
}

.config-header:hover {
  background: rgba(233, 69, 96, 0.05);
}

.config-title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.config-icon {
  font-size: 1.5rem;
}

.config-title h3 {
  margin: 0;
  font-size: 1.1rem;
  color: #ccd6f6;
}

.btn-toggle {
  background: none;
  border: none;
  color: #8892b0;
  cursor: pointer;
  padding: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  transition: all 0.3s ease;
}

.btn-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #e94560;
}

.btn-toggle svg {
  transition: transform 0.3s ease;
}

.config-header.expanded .btn-toggle svg {
  transform: rotate(180deg);
}

.config-content {
  padding: 0 1.5rem 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.config-status {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 1rem 0;
  padding: 0.75rem 1rem;
  background: rgba(0, 0, 0, 0.3);
  border-radius: 8px;
}

.status-indicator {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.status-connected {
  background: #10b981;
  box-shadow: 0 0 10px rgba(16, 185, 129, 0.5);
}

.status-disconnected {
  background: #ef4444;
  box-shadow: 0 0 10px rgba(239, 68, 68, 0.5);
}

.status-text {
  color: #ccd6f6;
  font-size: 0.9rem;
  font-weight: 500;
}

.input-group {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.input-group input[type="password"],
.input-group input[type="text"] {
  flex: 1;
}

.btn-icon {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid #233554;
  border-radius: 8px;
  padding: 0.75rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  color: #8892b0;
}

.btn-icon:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: #e94560;
  color: #e94560;
}

input[type="password"],
input[type="password"]:focus {
  font-family: 'Courier New', monospace;
  letter-spacing: 2px;
}

.config-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 1rem;
}

.config-help {
  margin-top: 1.5rem;
  padding: 1rem;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.3);
  border-radius: 8px;
  font-size: 0.85rem;
  color: #8892b0;
  line-height: 1.6;
}

.config-help p {
  margin: 0.5rem 0;
}

.config-help strong {
  color: #ccd6f6;
}

.config-help code {
  background: rgba(0, 0, 0, 0.3);
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-family: 'Courier New', monospace;
  color: #e94560;
  font-size: 0.8rem;
}