:root {
  --bg: #f8f9fa;
  --card-bg: #ffffff;
  --text: #1a1a2e;
  --text-secondary: #6c757d;
  --border: #dee2e6;
  --primary: #4361ee;
  --primary-hover: #3a56d4;
  --primary-light: #eef0ff;
  --success: #2ecc71;
  --success-bg: #e8f8ef;
  --error: #e74c3c;
  --error-bg: #fdecea;
  --warning: #f39c12;
  --warning-bg: #fef5e7;
  --pro-badge: #f1c40f;
  --radius: 12px;
  --shadow: 0 2px 16px rgba(0,0,0,0.06);
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'SF Mono', 'Cascadia Code', 'Fira Code', monospace;
  --max-width: 720px;
  --transition: 0.2s ease;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f0f1a;
    --card-bg: #1a1a2e;
    --text: #e0e0e0;
    --text-secondary: #9ca3af;
    --border: #2d2d44;
    --primary: #5b7bfa;
    --primary-hover: #4a6ae8;
    --primary-light: #1e2240;
    --success-bg: #0d2818;
    --error-bg: #2d0f0e;
    --warning-bg: #2d1f0a;
    --shadow: 0 2px 16px rgba(0,0,0,0.3);
  }
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; }
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem 1rem;
}
.container { width: 100%; max-width: var(--max-width); }
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2rem;
  margin-bottom: 1.5rem;
  border: 1px solid var(--border);
  transition: box-shadow var(--transition);
}
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.header-left { display: flex; align-items: center; gap: 0.75rem; }
.header-left h1 {
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary), #8b5cf6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.header-left .icon { font-size: 1.75rem; }
.pro-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: linear-gradient(135deg, #f1c40f, #f39c12);
  color: #1a1a2e;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.pro-badge.unlocked { background: linear-gradient(135deg, #2ecc71, #27ae60); color: #fff; }
.form-group { margin-bottom: 1.25rem; }
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
@media (max-width: 600px) { .form-row { grid-template-columns: 1fr; } }
label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.375rem;
  color: var(--text);
}
label .required { color: var(--error); margin-left: 2px; }
input, select, textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 0.95rem;
  font-family: var(--font-sans);
  background: var(--card-bg);
  color: var(--text);
  border: 2px solid var(--border);
  border-radius: 8px;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}
input.error, select.error, textarea.error {
  border-color: var(--error);
  box-shadow: 0 0 0 3px var(--error-bg);
}
input:disabled { opacity: 0.5; cursor: not-allowed; }
textarea { resize: vertical; min-height: 80px; }
.error-msg {
  display: none;
  color: var(--error);
  font-size: 0.8rem;
  margin-top: 0.25rem;
}
.error-msg.visible { display: block; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  font-family: var(--font-sans);
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), #5b7bfa);
  color: #fff;
  box-shadow: 0 4px 12px rgba(67,97,238,0.3);
}
.btn-primary:hover { background: linear-gradient(135deg, var(--primary-hover), #4a6ae8); transform: translateY(-1px); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }
.btn-secondary {
  background: var(--card-bg);
  color: var(--text);
  border: 2px solid var(--border);
}
.btn-secondary:hover { border-color: var(--primary); color: var(--primary); }
.btn-success {
  background: linear-gradient(135deg, var(--success), #27ae60);
  color: #fff;
}
.btn-danger {
  background: linear-gradient(135deg, var(--error), #c0392b);
  color: #fff;
}
.btn-sm { padding: 0.5rem 1rem; font-size: 0.85rem; }
.btn-lg { padding: 1rem 2rem; font-size: 1.1rem; }
.btn-block { width: 100%; }
.btn .spinner {
  width: 18px; height: 18px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  display: none;
}
.btn.loading .spinner { display: inline-block; }
.btn.loading .btn-text { display: none; }
@keyframes spin { to { transform: rotate(360deg); } }
.banner {
  padding: 0.75rem 1rem;
  border-radius: 8px;
  font-size: 0.875rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.banner-error { background: var(--error-bg); color: var(--error); border: 1px solid var(--error); }
.banner-success { background: var(--success-bg); color: #27ae60; border: 1px solid var(--success); }
.banner-warning { background: var(--warning-bg); color: var(--warning); border: 1px solid var(--warning); }
.banner-info { background: var(--primary-light); color: var(--primary); border: 1px solid var(--primary); }
.template-bar {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}
.template-bar select { flex: 1; min-width: 150px; }
.usage-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  background: var(--primary-light);
  border-radius: 8px;
  font-size: 0.85rem;
  margin-top: 1rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.usage-bar .count { font-weight: 700; }
.usage-bar .upgrade-link {
  color: var(--primary);
  font-weight: 600;
  cursor: pointer;
  text-decoration: underline;
}
.preview-area {
  margin-top: 1.5rem;
  border: 2px dashed var(--border);
  border-radius: 8px;
  padding: 1.5rem;
  min-height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
  text-align: center;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.preview-area.has-content {
  border-style: solid;
  border-color: var(--primary-light);
  justify-content: flex-start;
  align-items: flex-start;
  color: var(--text);
}
.preview-area .placeholder { opacity: 0.6; }
.success-state { text-align: center; padding: 2rem; }
.success-state .checkmark {
  font-size: 3rem;
  color: var(--success);
  margin-bottom: 1rem;
}
.success-state h3 { margin-bottom: 0.5rem; }
.success-state p { color: var(--text-secondary); margin-bottom: 1.5rem; }
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(4px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}
.modal-overlay.active { display: flex; }
.modal {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 2rem;
  max-width: 440px;
  width: 100%;
  box-shadow: 0 20px 60px rgba(0,0,0,0.2);
  text-align: center;
  border: 1px solid var(--border);
}
.modal .crown { font-size: 3rem; margin-bottom: 0.75rem; }
.modal h2 { margin-bottom: 0.5rem; font-size: 1.35rem; }
.modal p { color: var(--text-secondary); margin-bottom: 1.5rem; font-size: 0.95rem; }
.modal .price {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 0.25rem;
}
.modal .price-label { color: var(--text-secondary); font-size: 0.85rem; margin-bottom: 1.5rem; }
.modal .features {
  text-align: left;
  margin-bottom: 1.5rem;
  list-style: none;
}
.modal .features li {
  padding: 0.4rem 0;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.modal .features li::before { content: "✓"; color: var(--success); font-weight: 700; }
.modal .btn-group { display: flex; gap: 0.75rem; flex-wrap: wrap; justify-content: center; }
.footer-text { text-align: center; color: var(--text-secondary); font-size: 0.8rem; margin-top: 2rem; }
.spinner-full {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3rem;
}
.spinner-full::after {
  content: "";
  width: 40px; height: 40px;
  border: 4px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}
@media print {
  body { background: #fff; padding: 0; }
  .card { box-shadow: none; border: none; }
  .btn, .template-bar, .usage-bar, .modal-overlay, .header .pro-badge { display: none !important; }
}
@media (max-width: 480px) {
  body { padding: 0.75rem; }
  .card { padding: 1.25rem; }
  .header h1 { font-size: 1.25rem; }
}