/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--purple));
  color: #fff;
}

.btn-primary:hover { transform: translateY(-2px); box-shadow: var(--shadow); }

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-outline:hover { background: rgba(255,255,255,0.05); }

.btn-gold {
  background: var(--gold);
  color: #1a1a22;
}

.btn-block { width: 100%; }

.btn-lg { padding: 14px 24px; font-size: 15px; border-radius: var(--radius-lg); }

/* Cards */
.card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform var(--transition);
  cursor: pointer;
}

.card:hover { transform: translateY(-4px); }

.card-cover {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  background: linear-gradient(135deg, #667eea, #764ba2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
}

.card-body { padding: 10px 12px; }
.card-title { font-size: 13px; font-weight: 600; margin-bottom: 2px; }
.card-subtitle { font-size: 11px; color: var(--text-muted); }

.card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 6px;
}

.card-type { font-size: 11px; }
.card-type-photo { color: var(--accent); }
.card-type-video { color: var(--pink); }
.card-price { font-size: 11px; color: var(--gold); font-weight: 600; }

/* Reference grid */
.ref-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.ref-item {
  aspect-ratio: 1;
  border-radius: 10px;
  overflow: hidden;
  border: 2px solid transparent;
  cursor: pointer;
  transition: border-color var(--transition);
}

.ref-item.selected { border-color: var(--primary); }

.ref-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Model selector */
.model-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.model-chip {
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 12px;
  cursor: pointer;
  background: var(--bg-card);
  color: var(--text-muted);
  border: 1px solid var(--border);
  transition: all var(--transition);
}

.model-chip.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* Prompt input */
.prompt-area {
  width: 100%;
  min-height: 80px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 14px;
  color: var(--text);
  font-family: var(--font);
  font-size: 13px;
  resize: vertical;
}

.prompt-area:focus {
  outline: none;
  border-color: var(--primary);
}

/* Skeleton loader */
.skeleton {
  background: linear-gradient(90deg, var(--bg-card) 25%, var(--bg-hover) 50%, var(--bg-card) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius);
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Spinner */
.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--bg-card);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* Balance card */
.balance-card {
  background: linear-gradient(135deg, var(--bg-card), #2d2d3a);
  border: 1px solid rgba(99,102,241,0.3);
  border-radius: var(--radius-lg);
  padding: 16px;
}

.balance-amount {
  font-size: 28px;
  font-weight: 800;
  color: var(--gold);
}

/* Page header */
.page-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.back-btn {
  font-size: 18px;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
}

.page-title { font-size: 16px; font-weight: 700; }
.page-subtitle { font-size: 12px; color: var(--text-muted); }