body { font-family: Arial, sans-serif; margin: 0; background: #f4f6f9; color: #333; }
header { background: #1e293b; color: #fff; padding: 1rem 2rem; }
.nav-container { display: flex; justify-content: space-between; align-items: center; max-width: 1200px; margin: 0 auto; }
.nav-container h1 { margin: 0; font-size: 1.5rem; }
nav a { color: #cbd5e1; text-decoration: none; margin-left: 1.5rem; font-weight: bold; }
nav a:hover { color: #fff; }
.container { max-width: 1200px; margin: 2rem auto; padding: 0 1rem; }
.card { background: #fff; padding: 1.5rem; border-radius: 8px; box-shadow: 0 2px 4px rgba(0,0,0,0.05); margin-bottom: 1.5rem; }
table { width: 100%; border-collapse: collapse; margin-top: 1rem; }
th, td { padding: 12px; text-align: left; border-bottom: 1px solid #e2e8f0; }
th { background: #f8fafc; font-weight: bold; }
.btn { background: #2563eb; color: #fff; padding: 0.5rem 1rem; border: none; border-radius: 4px; text-decoration: none; cursor: pointer; display: inline-block; }
.btn:hover { background: #1d4ed8; }
.btn-secondary { background: #64748b; }
.btn-secondary:hover { background: #475569; }
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 1rem; }
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; margin-bottom: 0.5rem; font-weight: bold; font-size: 0.9rem; }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 0.5rem; border: 1px solid #cbd5e1; border-radius: 4px; box-sizing: border-box; }