:root {
    --primary: #2c3e50;
    --secondary: #18bc9c;
    --danger: #e74c3c;
    --warning: #f39c12;
    --light: #ecf0f1;
    --dark: #34495e;
}
* { box-sizing: border-box; font-family: 'Segoe UI', Arial, sans-serif; margin: 0; padding: 0; }
body { background: #f8f9fa; color: var(--dark); line-height: 1.6; }
header { background: var(--primary); color: white; padding: 1rem 2rem; display: flex; justify-content: space-between; align-items: center; }
header a { color: white; text-decoration: none; margin-left: 15px; font-weight: bold; }
.container { max-width: 1200px; margin: 2rem auto; padding: 0 1rem; }
.card { background: white; border-radius: 6px; padding: 2rem; box-shadow: 0 4px 6px rgba(0,0,0,0.05); margin-bottom: 2rem; }
h1, h2, h3 { margin-bottom: 1rem; color: var(--primary); }
.form-group { margin-bottom: 1.25rem; }
.form-group label { display: block; margin-bottom: 0.5rem; font-weight: 600; }
.form-control { width: 100%; padding: 0.75rem; border: 1px solid #ccc; border-radius: 4px; font-size: 1rem; }
.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(45%, 1fr)); gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.5rem; }
button, .btn { background: var(--secondary); color: white; border: none; padding: 0.75rem 1.5rem; border-radius: 4px; cursor: pointer; font-size: 1rem; text-decoration: none; display: inline-block; text-align: center; }
.btn-danger { background: var(--danger); }
.btn-secondary { background: var(--dark); }
table { width: 100%; border-collapse: collapse; margin-top: 1rem; }
table, th, td { border: 1px solid #dee2e6; }
th, td { padding: 0.75rem; text-align: left; vertical-align: top; }
th { background: var(--light); }
.alert { padding: 1rem; margin-bottom: 1.5rem; border-radius: 4px; color: white; }
.alert-success { background: var(--secondary); }
.alert-danger { background: var(--danger); }
.alert-warning { background: var(--warning); color: white; }
.badge { padding: 0.25rem 0.5rem; border-radius: 4px; font-size: 0.85rem; font-weight: bold; color: white; }
.badge-approved { background: var(--secondary); }
.guide-box { background: #e8f4f8; border-left: 5px solid #3498db; padding: 1rem; margin-bottom: 1.5rem; border-radius: 0 4px 4px 0; }