:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-tertiary: #1a1a25;
  --bg-card: rgba(26, 26, 37, 0.8);
  --bg-hover: rgba(255, 255, 255, 0.05);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-active: rgba(168, 85, 247, 0.5);
  --text-primary: #f0f0f5;
  --text-secondary: #8b8b9e;
  --text-muted: #5a5a6e;
  --accent-primary: #a855f7;
  --accent-secondary: #6366f1;
  --accent-gradient: linear-gradient(135deg, #a855f7 0%, #6366f1 100%);
  --accent-glow: 0 0 20px rgba(168, 85, 247, 0.3);
  --success: #22c55e;
  --error: #ef4444;
  --warning: #f59e0b;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
  --transition-slow: 0.4s ease;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
}

*::selection {
  background: rgba(168, 85, 247, 0.3);
}

*:focus {
  outline: none;
}

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

html {
  font-size: 14px;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.5;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(168, 85, 247, 0.15), transparent),
    radial-gradient(ellipse 60% 40% at 100% 50%, rgba(99, 102, 241, 0.1), transparent),
    radial-gradient(ellipse 60% 40% at 0% 80%, rgba(168, 85, 247, 0.08), transparent);
  pointer-events: none;
  z-index: -1;
}

.app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
}

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

.logo-icon {
  width: 36px;
  height: 36px;
}

.logo-text {
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.header-actions .btn-icon {
  text-decoration: none;
  display: flex;
}

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

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

.btn-icon svg {
  width: 20px;
  height: 20px;
}

.main {
  flex: 1;
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 1.5rem;
  padding: 1.5rem 2rem;
  max-width: 1600px;
  margin: 0 auto;
  width: 100%;
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.panel {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.panel-header {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-color);
  background: rgba(255, 255, 255, 0.02);
}

.panel-header h2 {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.panel-content {
  padding: 1rem;
}

.mode-toggle {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.mode-btn {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.25rem;
  padding: 0.875rem 1rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: left;
}

.mode-btn:hover {
  background: var(--bg-hover);
  border-color: var(--border-active);
}

.mode-btn.active {
  background: linear-gradient(135deg, rgba(168, 85, 247, 0.15), rgba(99, 102, 241, 0.1));
  border-color: var(--accent-primary);
  color: var(--text-primary);
}

.mode-icon {
  font-size: 1.25rem;
}

.mode-btn span:nth-child(2) {
  font-weight: 600;
}

.mode-btn small {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.task-types {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.task-option {
  cursor: pointer;
}

.task-option input {
  display: none;
}

.task-card {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.task-option input:checked + .task-card {
  background: linear-gradient(135deg, rgba(168, 85, 247, 0.15), rgba(99, 102, 241, 0.1));
  border-color: var(--accent-primary);
}

.task-icon {
  font-size: 1.25rem;
}

.task-label {
  font-weight: 500;
}

.examples-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.example-btn {
  padding: 0.875rem 1rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: left;
  font-size: 1rem;
  font-weight: 500;
}

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

.show-more-btn {
  width: 100%;
  padding: 0.625rem 1rem;
  margin-top: 0.5rem;
  background: transparent;
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: 0.875rem;
}

.show-more-btn:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  background: rgba(168, 85, 247, 0.05);
}

.content {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.tabs {
  display: flex;
  gap: 0.25rem;
  padding: 0.25rem;
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  width: fit-content;
}

.tab {
  padding: 0.625rem 1.25rem;
  background: transparent;
  border: none;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  font-weight: 500;
  transition: all var(--transition-fast);
}

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

.tab.active {
  background: var(--accent-gradient);
  color: white;
  box-shadow: var(--accent-glow);
}

.tab-content {
  display: none;
  animation: fadeIn 0.3s ease;
}

.tab-content.active {
  display: block;
}

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

.form-grid {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-section {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
}

.form-section h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.form-section h3 small {
  font-weight: 400;
  color: var(--text-muted);
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  contain: layout;
}

.field.full-width {
  grid-column: 1 / -1;
}

.field label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

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

.field-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.field-row:first-child {
  margin-top: 0;
}

input[type="text"],
input[type="number"],
input[type="password"],
textarea,
select {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.875rem;
  transition: all var(--transition-fast);
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(168, 85, 247, 0.15);
}

input::placeholder,
textarea::placeholder {
  color: var(--text-muted);
}

textarea {
  resize: vertical;
  min-height: 80px;
  max-height: 400px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8125rem;
  line-height: 1.6;
  overflow-y: auto;
}

select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238b8b9e' stroke-width='2'%3E%3Cpolyline points='6,9 12,15 18,9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

.toggle-label {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
  height: 100%;
  min-height: 38px;
}

.toggle-label input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-label span:first-child {
  flex: 1;
}

.toggle {
  position: relative;
  width: 44px;
  height: 24px;
  background: var(--bg-tertiary);
  border-radius: 12px;
  border: 1px solid var(--border-color);
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.toggle::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  background: var(--text-muted);
  border-radius: 50%;
  transition: all var(--transition-fast);
}

.toggle-label input:checked + .toggle {
  background: var(--accent-gradient);
  border-color: var(--accent-primary);
}

.toggle-label input:checked + .toggle::after {
  left: 22px;
  background: white;
}

.toggle-label input:focus-visible + .toggle {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
}

.field:has(.toggle-label) {
  display: flex;
  align-items: flex-end;
}

.tooltip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  font-size: 10px;
  color: var(--text-muted);
  cursor: help;
  margin-left: 4px;
  position: relative;
}

.tooltip:hover::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  padding: 8px 12px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 12px;
  font-weight: 400;
  color: var(--text-primary);
  white-space: nowrap;
  max-width: 280px;
  white-space: normal;
  text-align: left;
  z-index: 1000;
  box-shadow: var(--shadow-md);
}

.tooltip:hover::before {
  content: '';
  position: absolute;
  bottom: calc(100% + 2px);
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: var(--border-color);
  z-index: 1000;
}

.section-tooltip {
  font-size: 12px;
  vertical-align: middle;
}

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

input[type="range"] {
  flex: 1;
  height: 6px;
  background: var(--bg-tertiary);
  border-radius: 3px;
  appearance: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 18px;
  height: 18px;
  background: var(--accent-gradient);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(168, 85, 247, 0.4);
  transition: transform var(--transition-fast);
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.1);
}

.slider-value {
  min-width: 48px;
  text-align: right;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8125rem;
  color: var(--accent-primary);
}

.file-upload {
  position: relative;
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  overflow: hidden;
}

.file-upload:hover {
  border-color: var(--border-active);
  background: var(--bg-hover);
}

.file-upload input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.file-upload-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  padding: 1.5rem;
  color: var(--text-secondary);
}

.file-upload-content svg {
  width: 32px;
  height: 32px;
  opacity: 0.5;
}

.file-name {
  padding: 0.75rem 1rem;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 0.875rem;
}

.file-name:not(.hidden) + .file-upload-content {
  display: none;
}

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

.output-header h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.btn-danger {
  padding: 0.5rem 1rem;
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid var(--error);
  border-radius: var(--radius-md);
  color: var(--error);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-danger:hover {
  background: var(--error);
  color: white;
}

.generations-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3rem;
  color: var(--text-muted);
  text-align: center;
}

.empty-state svg {
  width: 64px;
  height: 64px;
  opacity: 0.3;
  margin-bottom: 1rem;
}

.empty-state span {
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 0.25rem;
}

.empty-state p {
  font-size: 0.875rem;
}

.generation-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1rem;
  animation: slideUp 0.3s ease;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.generation-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

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

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

.btn-download, .btn-delete {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-download:hover {
  background: rgba(34, 197, 94, 0.1);
  border-color: var(--success);
  color: var(--success);
}

.btn-delete:hover {
  background: rgba(239, 68, 68, 0.1);
  border-color: var(--error);
  color: var(--error);
}

.btn-download svg, .btn-delete svg {
  width: 14px;
  height: 14px;
}

.generation-audio {
  margin-bottom: 0.75rem;
}

.generation-audio audio {
  width: 100%;
  height: 40px;
  border-radius: var(--radius-md);
}

.generation-info {
  cursor: pointer;
}

.generation-caption {
  font-size: 0.875rem;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.generation-caption.expanded {
  -webkit-line-clamp: unset;
}

.generation-lyrics {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: 'JetBrains Mono', monospace;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  white-space: pre-wrap;
}

.generation-lyrics.expanded {
  -webkit-line-clamp: unset;
}

.generation-expand {
  font-size: 0.75rem;
  color: var(--accent-primary);
  margin-top: 0.25rem;
  cursor: pointer;
}

.generation-expand:hover {
  text-decoration: underline;
}

.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(20px);
  border-top: 1px solid var(--border-color);
  position: sticky;
  bottom: 0;
}

.footer-info {
  display: flex;
  align-items: center;
  gap: 1rem;
}

#statusText {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.btn-primary {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  background: var(--accent-gradient);
  border: none;
  border-radius: var(--radius-md);
  color: white;
  font-weight: 600;
  font-size: 0.9375rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 24px rgba(168, 85, 247, 0.4);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-primary.loading {
  pointer-events: none;
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

.btn-primary svg {
  width: 18px;
  height: 18px;
}

.btn-secondary {
  padding: 0.75rem 1.5rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-secondary:hover {
  background: var(--bg-hover);
  border-color: var(--border-active);
}

.modal {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.modal.active {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 440px;
  transform: scale(0.95);
  transition: transform var(--transition-normal);
}

.modal-content.modal-small {
  max-width: 360px;
}

.modal.active .modal-content {
  transform: scale(1);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
  font-size: 1.125rem;
  font-weight: 600;
  margin: 0;
}

.modal-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 1.5rem;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.modal-body {
  padding: 1.5rem;
}

.modal-body p {
  margin: 0;
  color: var(--text-secondary);
  line-height: 1.6;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border-color);
}

.toast-container {
  position: fixed;
  bottom: 6rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  z-index: 1001;
}

.toast {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.875rem 1.25rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  animation: slideUp 0.3s ease;
  white-space: nowrap;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

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

.toast.warning {
  border-color: var(--warning);
}

.hidden {
  display: none !important;
}

@media (max-width: 1024px) {
  .main {
    grid-template-columns: 1fr;
  }

  .sidebar {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  }

  .output-container {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .header,
  .footer {
    padding: 1rem;
  }

  .main {
    padding: 1rem;
  }

  .field-row {
    grid-template-columns: 1fr;
  }
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
  border-radius: 5px;
}

::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border-radius: 5px;
  border: 2px solid var(--bg-secondary);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

::-webkit-scrollbar-corner {
  background: var(--bg-secondary);
}

* {
  scrollbar-width: thin;
  scrollbar-color: var(--bg-tertiary) var(--bg-secondary);
}