@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  --bg-primary: #0d0d0d;
  --bg-secondary: #111111;
  --bg-card: #1a1a1a;
  --border-default: rgba(255, 255, 255, 0.03);
  --border-hover: rgba(255, 255, 255, 0.08);
  --text-primary: #ffffff;
  --text-secondary: #888888;
  --text-muted: #666666;
  --accent-neon: #C8FF00;
  --accent-neon-dark: #9ACC00;
  --badge-top: #C8FF00;
  --badge-new: #C8FF00;
  --badge-pro: #f59e0b;
  --badge-trending: #ef4444;
  --badge-fast: #06b6d4;
  --nav-height: 56px;
  --promo-height: 40px;
}

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

body {
  font-family: 'Inter', -apple-system, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  padding-top: calc(var(--nav-height) + var(--promo-height));
}

/* Promo Banner */
.promo-banner {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--promo-height);
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1001;
  border-bottom: 1px solid var(--border-default);
  font-size: 14px;
  color: var(--text-secondary);
}

.promo-text {
  color: var(--accent-neon);
  font-weight: 500;
}

/* Horizontal Navigation */
.top-nav {
  position: fixed;
  top: var(--promo-height);
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-default);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  z-index: 1000;
}

.nav-logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
}

.nav-logo .highlight {
  color: var(--accent-neon);
}

.nav-center {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s ease;
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -16px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent-neon);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.credits-display {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-secondary);
}

.credits-amount {
  color: var(--accent-neon);
  font-weight: 600;
}

.user-menu {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  padding: 8px 12px;
  border-radius: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  transition: all 0.2s ease;
}

.user-menu:hover {
  border-color: var(--border-hover);
}

.user-avatar {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--accent-neon);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--bg-primary);
  font-weight: 600;
  font-size: 12px;
}

/* Mobile Nav */
.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 18px;
  cursor: pointer;
}

@media (max-width: 768px) {
  .nav-center {
    display: none;
  }
  
  .mobile-nav-toggle {
    display: block;
  }
  
  .nav-right {
    gap: 12px;
  }
}

/* Main Content */
.main-content {
  min-height: 100vh;
  padding: 40px 24px;
}

.content-container {
  max-width: 1200px;
  margin: 0 auto;
}

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: 12px;
  overflow: hidden;
  transition: all 0.2s ease;
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
  font-size: 14px;
}

.btn-primary {
  background: var(--accent-neon);
  color: var(--bg-primary);
}

.btn-primary:hover {
  background: var(--accent-neon-dark);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  color: var(--text-primary);
}

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

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

/* Badges */
.badge {
  display: inline-block;
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-top, .badge-new { 
  background: var(--accent-neon); 
  color: var(--bg-primary); 
}
.badge-pro { background: var(--badge-pro); color: white; }
.badge-trending { background: var(--badge-trending); color: white; }
.badge-fast { background: var(--badge-fast); color: white; }

/* Form Elements */
.input-group {
  margin-bottom: 20px;
}

.input-label {
  display: block;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--text-primary);
  font-size: 14px;
}

.input-field {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: 8px;
  color: var(--text-primary);
  font-family: inherit;
  transition: border-color 0.2s ease;
  font-size: 14px;
}

.input-field:focus {
  outline: none;
  border-color: var(--accent-neon);
}

.textarea-field {
  min-height: 100px;
  resize: vertical;
  font-family: inherit;
}

/* Home Page Styles */
.hero-section {
  text-align: center;
  padding: 80px 0;
  border-bottom: 1px solid var(--border-default);
  margin-bottom: 60px;
}

.hero-title {
  font-size: 48px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.hero-subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 32px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.section-title {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 24px;
  color: var(--text-primary);
}

.model-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  margin-bottom: 60px;
}

.model-card {
  position: relative;
}

.model-card-header {
  aspect-ratio: 16/10;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.model-icon {
  font-size: 32px;
  opacity: 0.3;
}

.model-badge {
  position: absolute;
  top: 12px;
  right: 12px;
}

.model-card-body {
  padding: 20px;
}

.model-name {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.model-desc {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 16px;
  line-height: 1.4;
}

.model-price {
  font-weight: 600;
  color: var(--accent-neon);
  font-size: 14px;
}

/* Generate Page Styles */
.generate-container {
  display: flex;
  flex-direction: column;
  height: calc(100vh - var(--nav-height) - var(--promo-height));
  position: relative;
}

.page-tabs {
  display: flex;
  gap: 32px;
  border-bottom: 1px solid var(--border-default);
  margin-bottom: 40px;
}

.page-tab {
  padding: 16px 0;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.2s ease;
}

.page-tab.active {
  color: var(--text-primary);
  border-bottom-color: var(--accent-neon);
}

.result-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 400px;
  margin-bottom: 200px; /* Space for bottom prompt area */
}

.result-placeholder {
  text-align: center;
  color: var(--text-secondary);
}

.result-icon {
  font-size: 64px;
  opacity: 0.3;
  margin-bottom: 16px;
}

.result-text {
  font-size: 18px;
  margin-bottom: 8px;
}

.result-subtext {
  font-size: 14px;
  color: var(--text-muted);
}

.result-image,
.result-video {
  max-width: 100%;
  max-height: 500px;
  border-radius: 12px;
  margin-bottom: 20px;
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-default);
  border-top: 3px solid var(--accent-neon);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: 16px;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.loading-text {
  color: var(--text-secondary);
  font-size: 16px;
}

.elapsed-time {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 8px;
}

/* Bottom Prompt Area */
.prompt-area {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-default);
  padding: 24px;
  z-index: 100;
}

.prompt-container {
  max-width: 1200px;
  margin: 0 auto;
}

.model-selector-compact {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
}

.model-select {
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: 8px;
  padding: 8px 12px;
  color: var(--text-primary);
  font-size: 14px;
  min-width: 200px;
}

.model-select:focus {
  outline: none;
  border-color: var(--accent-neon);
}

.prompt-input-area {
  display: flex;
  gap: 16px;
  align-items: flex-end;
}

.prompt-input-group {
  flex: 1;
}

.prompt-input {
  width: 100%;
  padding: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: 12px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 16px;
  resize: none;
  min-height: 56px;
  max-height: 120px;
}

.prompt-input:focus {
  outline: none;
  border-color: var(--accent-neon);
}

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

.generate-btn {
  padding: 16px 32px;
  font-size: 16px;
  font-weight: 600;
  white-space: nowrap;
  min-width: 140px;
}

.parameter-controls {
  display: flex;
  gap: 16px;
  align-items: center;
  margin-top: 12px;
  flex-wrap: wrap;
}

.parameter-pill {
  padding: 6px 12px;
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: 16px;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 12px;
}

.parameter-pill:hover,
.parameter-pill.selected {
  border-color: var(--accent-neon);
  background: rgba(200, 255, 0, 0.1);
  color: var(--text-primary);
}

.upload-area {
  display: flex;
  gap: 16px;
  margin-top: 12px;
}

.upload-zone {
  border: 2px dashed var(--border-default);
  border-radius: 8px;
  padding: 16px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
  min-width: 120px;
  font-size: 12px;
  color: var(--text-muted);
}

.upload-zone:hover,
.upload-zone.dragover {
  border-color: var(--accent-neon);
  background: rgba(200, 255, 0, 0.05);
}

.upload-preview {
  max-width: 60px;
  max-height: 60px;
  border-radius: 4px;
  margin-top: 8px;
}

/* Apps Page */
.apps-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 32px;
}

.page-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-primary);
}

.search-input {
  width: 300px;
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: 8px;
  padding: 12px 16px;
  color: var(--text-primary);
  font-size: 14px;
}

.search-input:focus {
  outline: none;
  border-color: var(--accent-neon);
}

.category-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.category-tab {
  padding: 10px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: 20px;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 500;
}

.category-tab:hover,
.category-tab.active {
  border-color: var(--accent-neon);
  background: rgba(200, 255, 0, 0.1);
  color: var(--text-primary);
}

/* API Key Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
}

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: 12px;
  padding: 32px;
  width: 400px;
  max-width: 90vw;
}

.modal-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 16px;
  text-align: center;
  color: var(--text-primary);
}

.modal-text {
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: 24px;
  line-height: 1.5;
}

.modal-link {
  color: var(--accent-neon);
  text-decoration: none;
}

.modal-link:hover {
  text-decoration: underline;
}

.modal-actions {
  display: flex;
  gap: 12px;
  margin-top: 24px;
}

.modal-actions .btn {
  flex: 1;
}

/* Generation History */
.history-strip {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  padding: 20px 0;
  margin-top: 20px;
}

.history-item {
  flex-shrink: 0;
  width: 80px;
  height: 80px;
  border-radius: 8px;
  overflow: hidden;
  cursor: pointer;
  border: 1px solid var(--border-default);
  transition: border-color 0.2s ease;
}

.history-item:hover {
  border-color: var(--accent-neon);
}

.history-thumbnail {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Responsive */
@media (max-width: 1024px) {
  .content-container {
    padding: 0 20px;
  }
  
  .main-content {
    padding: 32px 16px;
  }
}

@media (max-width: 768px) {
  body {
    padding-top: calc(var(--nav-height) + var(--promo-height));
  }
  
  .hero-title {
    font-size: 32px;
  }
  
  .model-grid {
    grid-template-columns: 1fr;
  }
  
  .prompt-input-area {
    flex-direction: column;
    align-items: stretch;
  }
  
  .parameter-controls {
    gap: 8px;
  }
  
  .apps-header {
    flex-direction: column;
    gap: 16px;
    align-items: stretch;
  }
  
  .search-input {
    width: 100%;
  }
}

/* Utility Classes */
.hidden { display: none; }
.text-center { text-align: center; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mb-32 { margin-bottom: 32px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }