/* ═══════════════════════════════════════════════════════════════
   AI MODEL FILE FORGE — Modern SaaS UI Redesign
   Clean, professional, and visually stunning
═══════════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* ── Variables ─────────────────────────────────────────────── */
:root {
  /* Background colors - softer, more modern */
  --bg-primary:    #0f172a;
  --bg-secondary:  #1e293b;
  --bg-tertiary:   #334155;
  --bg-elevated:   #1e293b;
  --bg-hover:      #334155;
  
  /* Borders */
  --border-default: #334155;
  --border-hover:   #475569;
  --border-focus:   #3b82f6;
  
  /* Text colors */
  --text-primary:   #f8fafc;
  --text-secondary: #94a3b8;
  --text-tertiary:  #64748b;
  --text-muted:     #475569;
  
  /* Accent colors - blue instead of green for professional look */
  --accent:         #3b82f6;
  --accent-hover:   #2563eb;
  --accent-light:   rgba(59, 130, 246, 0.1);
  --accent-glow:    rgba(59, 130, 246, 0.3);
  
  /* Semantic colors */
  --success:        #10b981;
  --success-light:  rgba(16, 185, 129, 0.1);
  --warning:        #f59e0b;
  --warning-light:  rgba(245, 158, 11, 0.1);
  --error:          #ef4444;
  --error-light:    rgba(239, 68, 68, 0.1);
  
  /* Typography */
  --font-sans:      'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono:      'JetBrains Mono', 'Fira Code', monospace;
  
  /* Spacing & sizing */
  --radius-sm:      6px;
  --radius-md:      8px;
  --radius-lg:      12px;
  --radius-xl:      16px;
  
  /* Shadows */
  --shadow-sm:      0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md:      0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg:      0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl:      0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-glow:    0 0 20px rgba(59, 130, 246, 0.3);
}

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

html { 
  font-size: 14px; 
  scroll-behavior: smooth; 
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
  cursor: default;
}

/* ── Background Gradient Effect ────────────────────────────── */
/* Subtle gradient overlay for depth */
.bg-gradient {
  position: fixed;
  inset: 0;
  background: radial-gradient(ellipse at top, rgba(59, 130, 246, 0.08), transparent 60%);
  pointer-events: none;
  z-index: 0;
}

/* ── Scrollbar ──────────────────────────────────────────────── */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { 
  background: var(--bg-tertiary); 
  border-radius: 4px;
  transition: background 0.2s;
}
::-webkit-scrollbar-thumb:hover { background: var(--border-hover); }

/* ── Noise overlay (subtle) ─────────────────────────────────── */
body::before {
  content: '';
  position: fixed; 
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctacles='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.02'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 9999;
  opacity: 0.3;
}

/* ═══════════════════════════════════════════════════════════
   HEADER
   ═══════════════════════════════════════════════════════════ */
header {
  border-bottom: 1px solid var(--border-default);
  padding: 16px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(30, 41, 59, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: sticky; 
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.logo {
  display: flex;
  align-items: center;
  gap: 14px;
}

.logo-icon {
  width: 36px; 
  height: 36px;
  background: linear-gradient(135deg, var(--accent), var(--accent-hover));
  clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
  display: flex; 
  align-items: center; 
  justify-content: center;
  animation: pulse-icon 3s ease-in-out infinite;
  flex-shrink: 0;
  box-shadow: var(--shadow-glow);
}

@keyframes pulse-icon {
  0%, 100% { box-shadow: 0 0 0 0 var(--accent-glow); }
  50% { box-shadow: 0 0 24px 6px var(--accent-glow); }
}

.logo h1 {
  font-family: var(--font-sans);
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--text-primary);
}
.logo h1 span { 
  color: var(--accent);
  background: linear-gradient(135deg, var(--accent), #60a5fa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header-status {
  display: flex; 
  align-items: center; 
  gap: 8px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  padding: 6px 12px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-default);
}

.status-dot {
  width: 8px; 
  height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
  transition: all 0.3s ease;
}

.status-dot.online {
  background: var(--success);
  box-shadow: 0 0 12px rgba(16, 185, 129, 0.4);
  animation: blink-dot 2s ease-in-out infinite;
}

.status-dot.error { 
  background: var(--error);
  box-shadow: 0 0 8px rgba(239, 68, 68, 0.4);
}

@keyframes blink-dot {
  0%, 100% { opacity: 1; } 
  50% { opacity: 0.5; }
}

/* ═══════════════════════════════════════════════════════════
   LAYOUT
   ═══════════════════════════════════════════════════════════ */
.app-layout {
  display: grid;
  grid-template-columns: 1fr 360px;
  grid-template-rows: 1fr;
  height: calc(100vh - 69px);
  position: relative;
  z-index: 1;
}

/* ── Main Panel ─────────────────────────────────────────────── */
.main-panel {
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border-default);
  overflow: hidden;
  background: var(--bg-primary);
}

/* ═══════════════════════════════════════════════════════════
   PROMPT ZONE
   ═══════════════════════════════════════════════════════════ */
.prompt-zone {
  padding: 28px 32px 24px;
  border-bottom: 1px solid var(--border-default);
  background: var(--bg-secondary);
  box-shadow: var(--shadow-sm);
}

.zone-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.zone-label-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  background: var(--accent-light);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
}

.model-row {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
  align-items: flex-end;
}

.model-select-wrap {
  position: relative;
  flex: 1;
}

/* Added label for better UX */
.select-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
  letter-spacing: 0.025em;
}

.model-select-wrap::after {
  content: '▾';
  position: absolute; 
  right: 14px; 
  bottom: 12px;
  color: var(--accent);
  pointer-events: none;
  font-size: 0.85rem;
  transition: transform 0.2s;
}

select {
  width: 100%;
  background: var(--bg-primary);
  border: 1px solid var(--border-default);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 500;
  padding: 10px 36px 10px 14px;
  border-radius: var(--radius-md);
  outline: none;
  appearance: none;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: var(--shadow-sm);
}

select:hover { 
  border-color: var(--border-hover);
  background: var(--bg-tertiary);
}

select:focus { 
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light), var(--shadow-sm);
}

select option { 
  background: var(--bg-primary);
  padding: 8px;
}

.btn-refresh {
  background: var(--bg-primary);
  border: 1px solid var(--border-default);
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 10px 16px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
  box-shadow: var(--shadow-sm);
}

.btn-refresh:hover { 
  border-color: var(--accent); 
  color: var(--accent);
  background: var(--accent-light);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

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

.btn-refresh.spinning { 
  animation: spin 0.8s linear infinite; 
}

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

textarea#prompt {
  width: 100%;
  background: var(--bg-primary);
  border: 2px solid var(--border-default);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  padding: 16px;
  border-radius: var(--radius-lg);
  resize: vertical;
  min-height: 140px;
  max-height: 400px;
  outline: none;
  line-height: 1.7;
  transition: all 0.2s ease;
  box-shadow: var(--shadow-sm);
}

textarea#prompt::placeholder { 
  color: var(--text-tertiary);
  font-size: 0.85rem;
}

textarea#prompt:hover {
  border-color: var(--border-hover);
}

textarea#prompt:focus { 
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-light), var(--shadow-md);
}

.generate-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 16px;
  gap: 16px;
}

.char-count {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  font-weight: 500;
  font-family: var(--font-mono);
  padding: 4px 8px;
  background: var(--bg-primary);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-default);
}

#btn-generate {
  background: linear-gradient(135deg, var(--accent), var(--accent-hover));
  color: #fff;
  border: none;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.025em;
  padding: 12px 32px;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-md), 0 0 0 0 var(--accent-glow);
}

#btn-generate::before {
  content: '';
  position: absolute; 
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
  transform: translateX(-100%);
  transition: transform 0.5s ease;
}

#btn-generate:hover { 
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  transform: translateY(-2px);
}

#btn-generate:hover::before { 
  transform: translateX(100%); 
}

#btn-generate:active { 
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

#btn-generate:disabled {
  background: var(--bg-tertiary);
  color: var(--text-muted);
  cursor: not-allowed;
  transform: none;
  box-shadow: var(--shadow-sm);
}

#btn-generate:disabled::before {
  display: none;
}

.btn-arrow { 
  font-size: 1.2rem;
  transition: transform 0.2s;
}

#btn-generate:not(:disabled):hover .btn-arrow {
  transform: scale(1.1);
}

/* ═══════════════════════════════════════════════════════════
   OUTPUT ZONE
   ═══════════════════════════════════════════════════════════ */
.output-zone {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding: 24px 32px;
  background: var(--bg-primary);
}

.output-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  gap: 16px;
}

.output-tabs {
  display: flex;
  gap: 6px;
  background: var(--bg-secondary);
  padding: 4px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-default);
}

.tab-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 6px;
}

.tab-btn:hover:not(.active) { 
  color: var(--text-primary);
  background: var(--bg-tertiary);
}

.tab-btn.active {
  color: var(--text-primary);
  background: var(--accent);
  box-shadow: var(--shadow-md);
}

.tab-icon {
  font-size: 0.9rem;
}

.output-meta {
  font-size: 0.75rem;
  color: var(--text-secondary);
  display: flex;
  gap: 10px;
  align-items: center;
}

.meta-pill {
  background: var(--bg-secondary);
  border: 1px solid var(--border-default);
  padding: 5px 10px;
  border-radius: var(--radius-md);
  display: none;
  font-weight: 600;
  font-family: var(--font-mono);
  font-size: 0.7rem;
}

.meta-pill.visible { 
  display: block;
  animation: fadeIn 0.3s ease;
}

.meta-pill span { 
  color: var(--accent);
  font-weight: 700;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.output-content {
  flex: 1;
  overflow-y: auto;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  background: var(--bg-secondary);
  position: relative;
  box-shadow: var(--shadow-sm);
}

.tab-panel { 
  display: none; 
  height: 100%; 
}

.tab-panel.active { 
  display: flex; 
  flex-direction: column;
  animation: slideUp 0.3s ease;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Raw output */
#raw-output {
  font-size: 0.82rem;
  padding: 20px;
  white-space: pre-wrap;
  overflow-y: auto;
  flex: 1;
  color: var(--text-secondary);
  line-height: 1.8;
  font-family: var(--font-mono);
}

/* Parsed files panel */
#parsed-output {
  padding: 16px;
  overflow-y: auto;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* Empty state */
.empty-state {
  position: absolute; 
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-tertiary);
  gap: 16px;
  pointer-events: none;
}

.empty-icon {
  font-size: 3rem;
  opacity: 0.3;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.empty-state p {
  font-size: 0.85rem;
  text-align: center;
  max-width: 260px;
  line-height: 1.7;
  color: var(--text-muted);
}

/* ═══════════════════════════════════════════════════════════
   FILE CARD
   ═══════════════════════════════════════════════════════════ */
.file-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  overflow: hidden;
  animation: slideIn 0.4s cubic-bezier(0.4, 0, 0.2, 1) forwards;
  transition: all 0.2s ease;
  box-shadow: var(--shadow-sm);
}

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

@keyframes slideIn {
  from { 
    opacity: 0; 
    transform: translateY(12px) scale(0.98); 
  }
  to { 
    opacity: 1; 
    transform: translateY(0) scale(1); 
  }
}

.file-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-default);
  cursor: pointer;
  user-select: none;
  gap: 12px;
  transition: background 0.2s;
}

.file-card-header:hover { 
  background: var(--bg-tertiary);
}

.file-card-name {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 10px;
  overflow: hidden;
  font-family: var(--font-mono);
}

.file-ext-badge {
  font-size: 0.68rem;
  background: var(--accent-light);
  color: var(--accent);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  font-weight: 700;
  letter-spacing: 0.05em;
  border: 1px solid rgba(59, 130, 246, 0.2);
  font-family: var(--font-mono);
}

.file-path-text {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-card-actions {
  display: flex; 
  gap: 6px; 
  flex-shrink: 0;
}

.file-action-btn {
  background: var(--bg-primary);
  border: 1px solid var(--border-default);
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 5px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
}

.file-action-btn:hover { 
  border-color: var(--accent); 
  color: var(--accent);
  background: var(--accent-light);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

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

.file-card-code {
  display: none;
  overflow-x: auto;
  background: var(--bg-primary);
}

.file-card-code.expanded { 
  display: block;
  animation: expandDown 0.3s ease;
}

@keyframes expandDown {
  from { opacity: 0; max-height: 0; }
  to { opacity: 1; max-height: 2000px; }
}

.file-card-code pre {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 18px;
  color: var(--text-primary);
  line-height: 1.8;
  white-space: pre;
  overflow-x: auto;
}

/* ═══════════════════════════════════════════════════════════
   SIDEBAR
   ═══════════════════════════════════════════════════════════ */
.sidebar {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--bg-secondary);
  box-shadow: -2px 0 8px rgba(0, 0, 0, 0.1);
}

.sidebar-header {
  padding: 20px 24px 16px;
  border-bottom: 1px solid var(--border-default);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-tertiary);
}

.sidebar-title {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.sidebar-icon {
  font-size: 1rem;
}

.btn-clear-all {
  background: var(--bg-primary);
  border: 1px solid var(--border-default);
  color: var(--text-tertiary);
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
  letter-spacing: 0.05em;
}

.btn-clear-all:hover { 
  border-color: var(--error); 
  color: var(--error);
  background: var(--error-light);
  transform: translateY(-1px);
}

.file-tree {
  flex: 1;
  overflow-y: auto;
  padding: 16px 0;
}

.tree-empty {
  padding: 48px 24px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  line-height: 1.8;
}

.tree-empty-icon { 
  font-size: 2.5rem; 
  display: block; 
  margin-bottom: 12px; 
  opacity: 0.3;
  animation: float 3s ease-in-out infinite;
}

.tree-item {
  display: flex;
  align-items: center;
  padding: 8px 24px;
  gap: 10px;
  cursor: pointer;
  transition: all 0.15s ease;
  border-left: 3px solid transparent;
  font-size: 0.8rem;
  position: relative;
}

.tree-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: transparent;
  transition: background 0.2s;
}

.tree-item:hover { 
  background: var(--bg-tertiary);
  padding-left: 26px;
}

.tree-item.active {
  background: var(--accent-light);
  color: var(--accent);
  font-weight: 600;
}

.tree-item.active::before {
  background: var(--accent);
}

.tree-item-icon { 
  opacity: 0.5; 
  font-size: 0.9rem; 
  flex-shrink: 0;
  transition: opacity 0.2s;
}

.tree-item:hover .tree-item-icon {
  opacity: 0.8;
}

.tree-item-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-weight: 500;
}

.tree-item-size {
  color: var(--text-tertiary);
  font-size: 0.7rem;
  flex-shrink: 0;
  font-family: var(--font-mono);
}

.tree-folder {
  padding: 10px 24px 6px;
  font-size: 0.68rem;
  color: var(--text-tertiary);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 6px;
  font-weight: 700;
}

.tree-folder::before {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--border-default), transparent);
}

/* ═══════════════════════════════════════════════════════════
   FILE PREVIEW DRAWER
   ═══════════════════════════════════════════════════════════ */
.preview-drawer {
  border-top: 1px solid var(--border-default);
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  background: var(--bg-primary);
  box-shadow: inset 0 4px 8px rgba(0, 0, 0, 0.1);
}

.preview-drawer.open { 
  max-height: 350px;
  animation: drawerSlide 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes drawerSlide {
  from { opacity: 0; }
  to { opacity: 1; }
}

.preview-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  border-bottom: 1px solid var(--border-default);
  background: var(--bg-secondary);
}

.preview-filename {
  font-size: 0.78rem;
  color: var(--accent);
  font-weight: 600;
  font-family: var(--font-mono);
}

.preview-close {
  background: var(--bg-primary);
  border: 1px solid var(--border-default);
  color: var(--text-tertiary);
  cursor: pointer;
  font-size: 0.9rem;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
  font-weight: 600;
}

.preview-close:hover { 
  color: var(--error);
  border-color: var(--error);
  background: var(--error-light);
}

.preview-code {
  overflow-y: auto;
  max-height: 290px;
  padding: 16px 20px;
}

.preview-code pre {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-primary);
  line-height: 1.85;
  white-space: pre;
  overflow-x: auto;
}

/* ═══════════════════════════════════════════════════════════
   LOADING OVERLAY
   ═══════════════════════════════════════════════════════════ */
#loading-overlay {
  position: fixed; 
  inset: 0;
  background: rgba(15, 23, 42, 0.9);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 200;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 24px;
}

#loading-overlay.visible { 
  display: flex;
  animation: fadeIn 0.3s ease;
}

.loader-content {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.loader-ring {
  width: 70px; 
  height: 70px;
  border: 3px solid var(--border-default);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  position: relative;
}

.loader-ring-inner {
  position: absolute;
  inset: 6px;
  border: 2px solid transparent;
  border-top-color: var(--accent-hover);
  border-radius: 50%;
  animation: spin 1.2s linear infinite reverse;
}

.loader-text {
  font-family: var(--font-sans);
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.loader-sub {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ═══════════════════════════════════════════════════════════
   TOAST NOTIFICATION
   ═══════════════════════════════════════════════════════════ */
#toast {
  position: fixed;
  bottom: 28px; 
  right: 28px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: 14px 20px;
  font-size: 0.85rem;
  max-width: 360px;
  z-index: 300;
  transform: translateY(24px) scale(0.95);
  opacity: 0;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  align-items: center;
  gap: 12px;
  pointer-events: none;
  box-shadow: var(--shadow-xl);
  backdrop-filter: blur(8px);
}

#toast.show {
  transform: translateY(0) scale(1);
  opacity: 1;
}

#toast.success { 
  border-color: var(--success);
  background: linear-gradient(135deg, var(--bg-secondary), rgba(16, 185, 129, 0.05));
}

#toast.error { 
  border-color: var(--error);
  background: linear-gradient(135deg, var(--bg-secondary), rgba(239, 68, 68, 0.05));
}

#toast.success .toast-icon { color: var(--success); }
#toast.error .toast-icon { color: var(--error); }

.toast-icon { 
  font-size: 1.2rem; 
  flex-shrink: 0;
  font-weight: 700;
}

.toast-msg { 
  line-height: 1.5;
  font-weight: 500;
}

/* ═══════════════════════════════════════════════════════════
   ERROR BOX
   ═══════════════════════════════════════════════════════════ */
.error-box {
  background: var(--error-light);
  border: 1px solid var(--error);
  border-radius: var(--radius-lg);
  padding: 16px 18px;
  font-size: 0.85rem;
  color: var(--text-primary);
  line-height: 1.7;
  margin: 12px;
  box-shadow: var(--shadow-md);
}

.error-box strong { 
  color: var(--error); 
  display: block; 
  margin-bottom: 8px;
  font-size: 0.9rem;
  font-weight: 700;
}

/* ═══════════════════════════════════════════════════════════
   STATS BAR
   ═══════════════════════════════════════════════════════════ */
.stats-bar {
  padding: 16px 24px;
  border-top: 1px solid var(--border-default);
  display: flex;
  gap: 24px;
  background: var(--bg-tertiary);
  font-size: 0.75rem;
  color: var(--text-secondary);
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

.stat { 
  display: flex; 
  flex-direction: column; 
  gap: 4px;
  padding: 8px 12px;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-default);
  min-width: 80px;
  text-align: center;
}

.stat-val {
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.stat-val.accent { 
  color: var(--accent);
  background: linear-gradient(135deg, var(--accent), #60a5fa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat span:last-child {
  font-size: 0.68rem;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

/* ═══════════════════════════════════════════════════════════
   RESPONSIVE DESIGN
   ═══════════════════════════════════════════════════════════ */
@media (max-width: 1024px) {
  .app-layout {
    grid-template-columns: 1fr;
    grid-template-rows: 1fr auto;
  }
  
  .sidebar {
    border-right: none;
    border-top: 1px solid var(--border-default);
    max-height: 300px;
  }
  
  header {
    padding: 14px 20px;
  }
  
  .prompt-zone,
  .output-zone {
    padding-left: 20px;
    padding-right: 20px;
  }
}

@media (max-width: 768px) {
  .logo h1 {
    font-size: 1.1rem;
  }
  
  .logo-icon {
    width: 28px;
    height: 28px;
  }
  
  .header-status {
    font-size: 0.7rem;
    padding: 4px 8px;
  }
  
  .model-row {
    flex-direction: column;
    gap: 8px;
  }
  
  .btn-refresh {
    width: 100%;
    text-align: center;
  }
  
  .generate-row {
    flex-direction: column;
    gap: 12px;
  }
  
  #btn-generate {
    width: 100%;
    justify-content: center;
  }
  
  .output-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  
  .output-meta {
    width: 100%;
    justify-content: space-between;
  }
  
  .stats-bar {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 13px;
  }
  
  header {
    padding: 12px 16px;
  }
  
  .prompt-zone,
  .output-zone {
    padding: 16px;
  }
  
  .file-card-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  
  .file-card-actions {
    width: 100%;
    justify-content: flex-end;
  }
}

/* ═══════════════════════════════════════════════════════════
   ACCESSIBILITY IMPROVEMENTS
   ═══════════════════════════════════════════════════════════ */

/* Focus visible for keyboard navigation */
*:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

button:focus:not(:focus-visible),
select:focus:not(:focus-visible) {
  outline: none;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --border-default: #475569;
    --text-secondary: #cbd5e1;
    --text-tertiary: #94a3b8;
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ═══════════════════════════════════════════════════════════
   SCAN LINE ANIMATION (kept from original)
   ═══════════════════════════════════════════════════════════ */
@keyframes scanline {
  0% { transform: translateY(-100%); }
  100% { transform: translateY(100vh); }
}

.scanline {
  position: fixed;
  top: 0; 
  left: 0; 
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-glow), transparent);
  pointer-events: none;
  animation: scanline 6s linear infinite;
  z-index: 50;
  opacity: 0.12;
}