/* ========================================
   AI Image & Video Generator - Modern CSS
   Glassmorphism Design with Purple Accents
   ======================================== */

/* === 1. BASE STYLES & RESET === */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Color Palette */
  --color-primary: #9333ea;
  --color-primary-hover: #7e22ce;
  --color-primary-light: #c084fc;
  --color-bg-gradient-start: #eef2ff;
  --color-bg-gradient-end: #ffffff;
  --color-text-primary: #1e293b;
  --color-text-secondary: #64748b;
  --color-border: #e2e8f0;
  --color-glass-bg: rgba(255, 255, 255, 0.7);
  --color-glass-border: rgba(255, 255, 255, 0.8);

  /* Spacing */
  --spacing-xs: 8px;
  --spacing-sm: 12px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.08);
  --shadow-xl: 0 12px 48px rgba(0, 0, 0, 0.12);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto',
    'Helvetica Neue', Arial, sans-serif;
  background: linear-gradient(135deg, var(--color-bg-gradient-start) 0%, var(--color-bg-gradient-end) 100%);
  background-attachment: fixed;
  color: var(--color-text-primary);
  line-height: 1.6;
  min-height: 100vh;
  padding: var(--spacing-lg);
  font-size: 14px;
}

/* === 2. LAYOUT === */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--spacing-xl);
  background: var(--color-glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-glass-border);
}

/* === 2.1 LAYOUT WRAPPER (Left-Right Split) === */
.layout-wrapper {
  display: flex;
  gap: var(--spacing-lg);
  min-height: 600px;
  align-items: flex-start;
}

.left-panel {
  flex: 1;
  max-width: 50%;
  display: flex;
  flex-direction: column;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
  scroll-behavior: smooth;
}

.right-panel {
  flex: 1;
  max-width: 50%;
  position: sticky;
  top: var(--spacing-lg);
  height: fit-content;
}

.preview-container {
  background: rgba(248, 250, 252, 0.5);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  min-height: 500px;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--color-text-secondary);
  padding: var(--spacing-xl);
}

.empty-icon {
  font-size: 64px;
  margin-bottom: var(--spacing-md);
  opacity: 0.5;
}

.empty-state p {
  font-size: 16px;
  margin: 0;
}


h1 {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-xl);
  text-align: center;
  letter-spacing: -0.5px;
}

/* === 3. TAB NAVIGATION === */
.tabs {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xl);
  background: rgba(226, 232, 240, 0.4);
  padding: 6px;
  border-radius: var(--radius-md);
  backdrop-filter: blur(8px);
}

.tab-button {
  flex: 1;
  padding: var(--spacing-sm) var(--spacing-lg);
  border: none;
  background: transparent;
  color: var(--color-text-secondary);
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
}

.tab-button:hover {
  color: var(--color-text-primary);
  background: rgba(255, 255, 255, 0.5);
}

.tab-button.active {
  background: white;
  color: var(--color-primary);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

/* === 4. TAB CONTENT === */
.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
  animation: fadeIn var(--transition-base);
}

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

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* === 5. FORM SECTIONS === */
.form-section {
  margin-bottom: var(--spacing-md);
}

.form-section label {
  display: block;
  margin-bottom: var(--spacing-xs);
  color: var(--color-text-primary);
  font-weight: 500;
  font-size: 13px;
}

/* === 6. CONTROLS GRID === */
.controls-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

/* === 7. INPUT STYLES === */
input[type="text"],
input[type="number"],
select,
textarea {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: white;
  color: var(--color-text-primary);
  font-size: 14px;
  font-family: inherit;
  transition: all var(--transition-fast);
}

input[type="text"]:focus,
input[type="number"]:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(147, 51, 234, 0.1);
}

textarea {
  min-height: 100px;
  resize: vertical;
  line-height: 1.5;
}

/* === 8. RANGE SLIDERS === */
input[type="range"] {
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--color-border);
  outline: none;
  -webkit-appearance: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-primary);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

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

input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-primary);
  cursor: pointer;
  border: none;
  box-shadow: var(--shadow-sm);
}

/* === 9. FILE INPUT === */
input[type="file"] {
  width: 100%;
  padding: var(--spacing-md);
  border: 2px dashed var(--color-primary-light);
  border-radius: var(--radius-md);
  background: rgba(147, 51, 234, 0.03);
  cursor: pointer;
  transition: all var(--transition-base);
  font-size: 13px;
}

input[type="file"]:hover {
  border-color: var(--color-primary);
  background: rgba(147, 51, 234, 0.06);
}

/* === 10. IMAGE PREVIEW === */
.image-preview {
  margin-top: var(--spacing-sm);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: rgba(0, 0, 0, 0.02);
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.image-preview img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-sm);
}

/* === 11. CHECKBOX === */
.checkbox-section {
  margin-bottom: var(--spacing-lg);
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
  user-select: none;
}

.checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
  accent-color: var(--color-primary);
}

.checkbox-label span {
  color: var(--color-text-primary);
  font-size: 14px;
}

/* === 12. LORA SECTION === */
.lora-section {
  margin-bottom: var(--spacing-md);
  padding: var(--spacing-md);
  background: rgba(255, 255, 255, 0.5);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.lora-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-md);
}

.lora-header h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text-primary);
}

.add-lora-btn {
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--color-primary);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.add-lora-btn:hover:not(:disabled) {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

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

/* === 13. LORA ITEM === */
.lora-item {
  background: white;
  padding: var(--spacing-md);
  border-radius: var(--radius-sm);
  margin-bottom: var(--spacing-sm);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.lora-item-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-sm);
}

.lora-item-header h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-primary);
}

.remove-lora-btn {
  padding: 4px var(--spacing-sm);
  background: transparent;
  color: #ef4444;
  border: 1px solid #ef4444;
  border-radius: var(--radius-sm);
  font-size: 12px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.remove-lora-btn:hover {
  background: #ef4444;
  color: white;
}

.lora-controls {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.lora-scale-control {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.lora-scale-control label {
  margin: 0;
  font-size: 13px;
  color: var(--color-text-secondary);
}

.lora-scale-control input[type="range"] {
  flex: 1;
}

.lora-scale-value,
.img2img-lora-scale-value {
  min-width: 40px;
  text-align: right;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-primary);
}

/* === 14. BUTTONS === */
button[id$="-generate-button"],
#generate-button {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-xl);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-hover) 100%);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-md);
  margin: 0;
}

button[id$="-generate-button"]:hover,
#generate-button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

button[id$="-generate-button"]:active,
#generate-button:active {
  transform: translateY(0);
}

/* === 15. OUTPUT SECTION === */
.output {
  width: 100%;
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.output img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  display: block;
}

.output video {
  max-width: 100%;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
}

/* === 16. LOADING STATE === */
.loading {
  text-align: center;
  padding: var(--spacing-xl);
  color: var(--color-text-secondary);
  font-size: 16px;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.5;
  }
}

.loading::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 24px;
  margin-right: var(--spacing-sm);
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  vertical-align: middle;
}

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

/* === 17. ERROR STATE === */
.error {
  padding: var(--spacing-md);
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  border-radius: var(--radius-sm);
  color: #dc2626;
  font-size: 14px;
  text-align: center;
}

/* === 18. RESPONSIVE DESIGN === */
@media (max-width: 1024px) {
  .layout-wrapper {
    flex-direction: column;
  }

  .left-panel,
  .right-panel {
    max-width: 100%;
  }

  .left-panel {
    max-height: none;
    overflow-y: visible;
  }

  .left-panel-footer {
    position: relative;
    background: var(--color-glass-bg);
    padding: var(--spacing-md) 0;
  }

  .right-panel {
    position: relative;
    top: 0;
    min-height: 400px;
  }
}

@media (max-width: 768px) {
  body {
    padding: var(--spacing-xs);
    font-size: 13px;
  }

  .container {
    padding: var(--spacing-md);
  }

  h1 {
    font-size: 20px;
    margin-bottom: var(--spacing-md);
  }

  .tabs {
    flex-wrap: wrap;
    gap: var(--spacing-xs);
  }

  .tab-button {
    text-align: center;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 12px;
  }

  .controls-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
  }

  .form-section {
    margin-bottom: var(--spacing-sm);
  }

  .lora-section {
    padding: var(--spacing-sm);
  }

  .lora-header {
    flex-direction: column;
    align-items: stretch;
    gap: var(--spacing-sm);
  }

  .add-lora-btn {
    width: 100%;
  }

  .preview-container {
    min-height: 300px;
  }
}

/* === 19. SCROLLBAR STYLING === */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-border);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb {
  background: var(--color-primary-light);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary);
}

/* === 20. UTILITY CLASSES === */
.hidden {
  display: none !important;
}

.text-center {
  text-align: center;
}

.mt-sm {
  margin-top: var(--spacing-sm);
}

.mt-md {
  margin-top: var(--spacing-md);
}

.mt-lg {
  margin-top: var(--spacing-lg);
}

.mb-sm {
  margin-bottom: var(--spacing-sm);
}

.mb-md {
  margin-bottom: var(--spacing-md);
}

.mb-lg {
  margin-bottom: var(--spacing-lg);
}

/* === 21. HEADER & LANGUAGE SWITCHER === */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-xl);
}

.header-left {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.logo {
  font-size: 32px;
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.user-info {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-sm) var(--spacing-md);
  background: rgba(255, 255, 255, 0.6);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.credits-display {
  font-weight: 600;
  color: var(--color-primary);
  font-size: 14px;
}

.lang-switcher {
  position: relative;
}

.lang-button {
  padding: var(--spacing-sm);
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 20px;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
}

.lang-button:hover {
  background: white;
  box-shadow: var(--shadow-sm);
}

.lang-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: white;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  min-width: 120px;
  z-index: 100;
  overflow: hidden;
}

.lang-option {
  padding: var(--spacing-sm) var(--spacing-md);
  cursor: pointer;
  transition: background var(--transition-fast);
  font-size: 14px;
  color: var(--color-text-primary);
}

.lang-option:hover {
  background: rgba(147, 51, 234, 0.1);
}

.lang-option.active {
  background: rgba(147, 51, 234, 0.15);
  color: var(--color-primary);
  font-weight: 600;
}

.btn-secondary {
  padding: var(--spacing-sm) var(--spacing-md);
  background: white;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

.btn-logout {
  padding: var(--spacing-sm) var(--spacing-md);
  background: transparent;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-logout:hover {
  background: rgba(239, 68, 68, 0.1);
  border-color: #ef4444;
  color: #ef4444;
}