/* ============================================================
   ForgeVision — style.css
   Dark indigo theme, Space Grotesk + Inter typography
   ============================================================ */

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

:root {
  --bg-primary:    #1A1A2E;
  --bg-secondary:  #16213E;
  --bg-card:       #0F3460;
  --bg-input:      #0d1b35;
  --accent:        #E94560;
  --accent-glow:   rgba(233, 69, 96, 0.25);
  --text-primary:  #FFFFFF;
  --text-secondary:#CCCCCC;
  --text-muted:    #7a8aaa;
  --border:        rgba(255,255,255,0.08);
  --border-focus:  rgba(233,69,96,0.6);
  --radius:        10px;
  --radius-lg:     16px;
  --sidebar-w:     340px;
  --transition:    0.2s ease;
}

html, body {
  height: 100%;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ---- Scrollbar ---- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--bg-card); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(22, 33, 62, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
}

.header-inner {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 20px;
  letter-spacing: 0.02em;
}

.logo-icon {
  color: var(--accent);
  font-size: 18px;
}

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

.header-tagline {
  color: var(--text-muted);
  font-size: 13px;
  font-family: 'Inter', sans-serif;
}

/* ============================================================
   MAIN LAYOUT
   ============================================================ */
.main-layout {
  display: flex;
  height: calc(100vh - 60px);
  overflow: hidden;
}

/* ============================================================
   SIDEBAR
   ============================================================ */
.sidebar {
  width: var(--sidebar-w);
  min-width: var(--sidebar-w);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  overflow-x: hidden;
}

/* ---- Mode Tabs ---- */
.mode-tabs {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 16px 8px;
  border-bottom: 1px solid var(--border);
}

.mode-tab {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-secondary);
  font-family: 'Space Grotesk', sans-serif;
  font-size: 13px;
  font-weight: 600;
  padding: 10px 14px;
  text-align: left;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
  letter-spacing: 0.03em;
}

.mode-tab:hover {
  background: rgba(233, 69, 96, 0.08);
  border-color: var(--border-focus);
  color: var(--text-primary);
}

.mode-tab.active {
  background: rgba(233, 69, 96, 0.15);
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
}

/* ---- Panels ---- */
.panel {
  padding: 20px 16px 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  animation: fadeIn 0.25s ease;
}

.panel.hidden {
  display: none;
}

/* ---- Field Groups ---- */
.field-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field-group.half {
  flex: 1;
}

.field-row {
  display: flex;
  gap: 10px;
}

.field-label {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.char-count {
  font-weight: 400;
  font-family: 'Inter', sans-serif;
  text-transform: none;
  letter-spacing: 0;
  color: var(--text-muted);
  font-size: 11px;
}

/* ---- Textarea ---- */
.field-textarea {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  line-height: 1.5;
  padding: 10px 12px;
  resize: vertical;
  transition: border-color var(--transition), box-shadow var(--transition);
  width: 100%;
}

.field-textarea::placeholder {
  color: var(--text-muted);
}

.field-textarea:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

/* ---- Select ---- */
.field-select {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  padding: 9px 12px;
  width: 100%;
  cursor: pointer;
  transition: border-color var(--transition), box-shadow var(--transition);
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%237a8aaa' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 32px;
}

.field-select:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.field-select option {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

/* ---- Range Sliders ---- */
.field-range {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  background: var(--bg-card);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}

.field-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  box-shadow: 0 0 6px var(--accent-glow);
  transition: transform var(--transition), box-shadow var(--transition);
}

.field-range::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  box-shadow: 0 0 12px var(--accent-glow);
}

.field-range::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: none;
  box-shadow: 0 0 6px var(--accent-glow);
}

.range-labels {
  display: flex;
  justify-content: space-between;
  font-size: 10px;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ---- Sample Buttons ---- */
.sample-btns {
  display: flex;
  gap: 8px;
}

.sample-btn {
  flex: 1;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-secondary);
  font-family: 'Space Grotesk', sans-serif;
  font-size: 14px;
  font-weight: 600;
  padding: 8px;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}

.sample-btn:hover {
  background: rgba(233, 69, 96, 0.08);
  border-color: var(--border-focus);
  color: var(--text-primary);
}

.sample-btn.active {
  background: rgba(233, 69, 96, 0.18);
  border-color: var(--accent);
  color: var(--accent);
}

/* ---- Generate Button ---- */
.generate-btn {
  background: var(--accent);
  border: none;
  border-radius: var(--radius);
  color: #fff;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 13px 20px;
  cursor: pointer;
  width: 100%;
  transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 16px var(--accent-glow);
  margin-top: 4px;
}

.generate-btn:hover {
  opacity: 0.9;
  transform: translateY(-1px);
  box-shadow: 0 6px 24px var(--accent-glow);
}

.generate-btn:active {
  transform: translateY(0);
  opacity: 1;
}

.generate-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* ---- Drop Zones ---- */
.drop-zone {
  position: relative;
  background: var(--bg-input);
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  min-height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  overflow: hidden;
  transition: border-color var(--transition), background var(--transition);
}

.drop-zone:hover,
.drop-zone.drag-over {
  border-color: var(--accent);
  background: rgba(233, 69, 96, 0.05);
}

.drop-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 20px;
  text-align: center;
  pointer-events: none;
}

.drop-icon {
  font-size: 28px;
  color: var(--text-muted);
}

.drop-text {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
}

.drop-hint {
  font-size: 11px;
  color: var(--text-muted);
}

.drop-preview {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  top: 0;
  left: 0;
  border-radius: calc(var(--radius) - 2px);
}

.drop-preview.hidden {
  display: none;
}

.file-input-hidden {
  display: none;
}

/* ---- Upscale Info ---- */
.upscale-info {
  background: rgba(233, 69, 96, 0.06);
  border: 1px solid rgba(233, 69, 96, 0.2);
  border-radius: var(--radius);
  padding: 12px 14px;
}

.upscale-info p {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ============================================================
   GALLERY SECTION
   ============================================================ */
.gallery-section {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--bg-primary);
  position: relative;
}

.gallery-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  background: rgba(26, 26, 46, 0.8);
  backdrop-filter: blur(8px);
  flex-shrink: 0;
}

.gallery-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.03em;
}

.clear-btn {
  background: transparent;
  border: 1px solid rgba(233, 69, 96, 0.4);
  border-radius: var(--radius);
  color: var(--accent);
  font-family: 'Inter', sans-serif;
  font-size: 12px;
  font-weight: 600;
  padding: 7px 14px;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition);
}

.clear-btn:hover {
  background: rgba(233, 69, 96, 0.1);
  border-color: var(--accent);
}

/* ---- Gallery Grid ---- */
.gallery-grid {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
  align-content: start;
}

/* ---- Empty State ---- */
.gallery-empty {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 80px 20px;
  text-align: center;
  color: var(--text-muted);
  animation: fadeIn 0.4s ease;
}

.empty-icon {
  font-size: 48px;
  opacity: 0.4;
}

.gallery-empty p {
  font-size: 15px;
  color: var(--text-secondary);
}

.gallery-empty .hint {
  font-size: 13px;
  color: var(--text-muted);
}

/* ---- Image Cards ---- */
.image-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  animation: cardIn 0.35s ease;
  cursor: pointer;
}

.image-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.4), 0 0 0 1px rgba(233,69,96,0.2);
  border-color: rgba(233, 69, 96, 0.3);
}

.image-card img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}

.image-card:hover img {
  transform: scale(1.02);
}

.card-footer {
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: var(--bg-secondary);
}

.card-prompt {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.4;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.card-actions {
  display: flex;
  gap: 8px;
}

.card-btn,
.gallery-action-btn {
  flex: 1;
  background: linear-gradient(135deg, var(--accent), #ff6b7a);
  border: none;
  border-radius: 8px;
  color: #fff;
  font-family: 'Inter', sans-serif;
  font-size: 11px;
  font-weight: 600;
  padding: 10px 16px;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
  text-align: center;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(233, 69, 96, 0.3);
}

.card-btn:hover,
.gallery-action-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(233, 69, 96, 0.4);
}

/* ============================================================
   GALLERY ITEM (used by addToGallery in app.js)
   ============================================================ */
.gallery-item {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  animation: cardIn 0.35s ease;
  cursor: pointer;
}

.gallery-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.4), 0 0 0 1px rgba(233,69,96,0.2);
  border-color: rgba(233, 69, 96, 0.3);
}

.gallery-img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}

.gallery-item:hover .gallery-img {
  transform: scale(1.02);
}

.gallery-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(10,10,20,0.92) 0%, transparent 100%);
  padding: 16px 12px 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  opacity: 0;
  transition: opacity var(--transition);
}

.gallery-item:hover .gallery-overlay {
  opacity: 1;
}

.gallery-label {
  font-size: 11px;
  color: var(--text-secondary);
  font-family: 'Inter', sans-serif;
  line-height: 1.3;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.gallery-actions {
  display: flex;
  gap: 6px;
}

/* ============================================================
   LOADING OVERLAY
   ============================================================ */
.loading-overlay {
  position: absolute;
  inset: 0;
  background: rgba(26, 26, 46, 0.88);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
  animation: fadeIn 0.2s ease;
}

.loading-overlay[hidden] {
  display: none;
}

.loading-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.spinner {
  width: 48px;
  height: 48px;
  border: 3px solid rgba(233, 69, 96, 0.2);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.loading-text {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.03em;
}

/* ============================================================
   ERROR BOX (permanently hidden)
   ============================================================ */
.error-box {
  display: none !important;
}

/* ============================================================
   LIGHTBOX
   ============================================================ */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.2s ease;
}

.lightbox[hidden] {
  display: none;
}

.lightbox-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(10, 10, 20, 0.92);
  backdrop-filter: blur(8px);
  cursor: pointer;
}

.lightbox-modal {
  position: relative;
  z-index: 1;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  max-width: min(90vw, 900px);
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 24px 80px rgba(0,0,0,0.6), 0 0 0 1px rgba(233,69,96,0.15);
  animation: modalIn 0.25s ease;
}

.lightbox-close {
  position: absolute;
  top: 14px;
  right: 14px;
  z-index: 2;
  background: rgba(26, 26, 46, 0.8);
  border: 1px solid var(--border);
  border-radius: 50%;
  color: var(--text-secondary);
  font-size: 20px;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  line-height: 1;
}

.lightbox-close:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.lightbox-img-wrap {
  flex: 1;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #0a0a14;
  min-height: 200px;
}

.lightbox-image {
  max-width: 100%;
  max-height: 70vh;
  object-fit: contain;
  display: block;
}

.lightbox-actions {
  display: flex;
  gap: 12px;
  padding: 16px 20px;
  border-top: 1px solid var(--border);
  background: var(--bg-secondary);
}

.lightbox-btn {
  flex: 1;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-secondary);
  font-family: 'Space Grotesk', sans-serif;
  font-size: 13px;
  font-weight: 600;
  padding: 10px 16px;
  cursor: pointer;
  text-align: center;
  text-decoration: none;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}

.lightbox-btn:hover {
  background: rgba(233, 69, 96, 0.12);
  border-color: var(--border-focus);
  color: var(--text-primary);
}

/* ============================================================
   ANIMATIONS
   ============================================================ */
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes cardIn {
  from { opacity: 0; transform: translateY(16px) scale(0.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes modalIn {
  from { opacity: 0; transform: scale(0.94) translateY(20px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}

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

/* ============================================================
   RESPONSIVE — 768px breakpoint
   ============================================================ */
@media (max-width: 768px) {
  :root {
    --sidebar-w: 100%;
  }

  .main-layout {
    flex-direction: column;
    height: auto;
    overflow: visible;
  }

  .sidebar {
    width: 100%;
    min-width: 0;
    border-right: none;
    border-bottom: 1px solid var(--border);
    overflow: visible;
  }

  .gallery-section {
    height: auto;
    overflow: visible;
  }

  .gallery-grid {
    overflow: visible;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 14px;
    padding: 16px;
  }

  .lightbox-modal {
    max-width: 96vw;
    max-height: 92vh;
  }

  .lightbox-actions {
    flex-direction: column;
    gap: 8px;
  }

  .field-row {
    flex-direction: column;
  }

  .header-tagline {
    display: none;
  }
}