* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif; line-height: 1.6; color: #1f2937; background: #ffffff; }
.container { max-width: 800px; margin: 0 auto; padding: 0 1rem; }
header { background: #111827; color: #fff; padding: 2rem 0; text-align: center; }
header .container { display: flex; flex-direction: column; gap: 0.5rem; align-items: center; }
.lang-switch { margin-bottom: 0.5rem; }
.lang-btn { background: transparent; color: #9ca3af; border: 1px solid #4b5563; padding: 0.25rem 0.75rem; border-radius: 0.375rem; cursor: pointer; margin: 0 0.25rem; font-size: 0.875rem; }
.lang-btn.active { background: #3b82f6; color: #fff; border-color: #3b82f6; }
h1 { font-size: 2rem; margin-bottom: 0.5rem; }
h2 { font-size: 1.5rem; margin: 2rem 0 1rem; text-align: center; }
h3 { font-size: 1.25rem; margin-bottom: 0.5rem; }
p { margin-bottom: 1rem; }
nav { background: #f3f4f6; padding: 0.75rem 0; }
nav .container { display: flex; gap: 1.5rem; justify-content: center; flex-wrap: wrap; }
nav a { color: #1f2937; text-decoration: none; font-weight: 500; font-size: 0.875rem; }
nav a:hover { color: #3b82f6; }
section { padding: 2rem 0; }
.vertical-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 1rem; margin-top: 1rem; }
.vertical-card { border: 1px solid #e5e7eb; border-radius: 0.5rem; padding: 1rem; background: #fff; }
.vertical-card h3 { margin: 0 0 0.5rem; font-size: 1rem; }
.pricing-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1rem; margin-top: 1rem; }
.price-card { border: 1px solid #e5e7eb; border-radius: 0.5rem; padding: 1.5rem; background: #fff; text-align: center; }
.price-card.featured { border-color: #3b82f6; background: #eff6ff; }
.price { font-size: 2rem; font-weight: 700; color: #111827; margin: 0.5rem 0; }
.price-card ul { list-style: none; text-align: left; margin: 1rem 0; }
.price-card ul li { margin-bottom: 0.5rem; font-size: 0.875rem; color: #4b5563; }
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; margin-bottom: 0.25rem; font-weight: 500; font-size: 0.875rem; }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 0.5rem; border: 1px solid #d1d5db; border-radius: 0.375rem; font-size: 0.875rem; }
.btn { display: inline-block; padding: 0.75rem 1.5rem; background: #111827; color: #fff; border: none; border-radius: 0.375rem; font-size: 0.875rem; font-weight: 600; cursor: pointer; }
.btn:hover { background: #374151; }
.btn-primary { background: #3b82f6; width: 100%; }
.btn-primary:hover { background: #2563eb; }
.result { margin-top: 1rem; padding: 1rem; border-radius: 0.375rem; background: #f0fdf4; border: 1px solid #bbf7d0; color: #166534; font-size: 0.875rem; }
footer { background: #f9fafb; padding: 2rem 0; text-align: center; font-size: 0.875rem; color: #6b7280; border-top: 1px solid #e5e7eb; }
@media (max-width: 600px) { header h1 { font-size: 1.5rem; } nav .container { gap: 0.75rem; font-size: 0.8rem; } }