:root {
    --primary-color: #005A9C;
    --secondary-color: #f4f7fa;
    --text-color: #333;
    --border-color: #e0e0e0;
    --white: #fff;
    --shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    --detail-text-color: #555;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--secondary-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
    margin: 0;
    padding: 2rem;
}

.calculator-container {
    width: 100%;
    max-width: 900px;
    background: var(--white);
    border-radius: 12px;
    box-shadow: var(--shadow);
    overflow: hidden;
}
.logo {
    padding: 25px 30px;
    text-align: center;
}
header {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 25px 30px;
    text-align: center;
}
header h1 { margin: 0; font-size: 1.8rem; }
header p { margin: 5px 0 0; opacity: 0.9; }

.calculator-body { padding: 30px; }

h2 {
    color: var(--primary-color);
    border-bottom: 2px solid #f0f0f0;
    padding-bottom: 10px;
    margin-top: 0;
    margin-bottom: 20px;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.form-group { display: flex; flex-direction: column; }
.form-group label { font-weight: 600; margin-bottom: 8px; }
.form-group input, .form-group select {
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    background-color: var(--white);
}
.form-group input:focus, .form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 90, 156, 0.2);
}

/* Stili per le categorie */
.category-group {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 20px;
    overflow: hidden;
}
.category-header {
    padding: 12px 15px;
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--white);
}
.category-ID-AM .category-header { background-color: #2F5496; } /* Blu */
.category-ID-GV .category-header { background-color: #0e182b; } /* Blu scuro */
.category-DE-CM .category-header { background-color: #FFC000; color: #000; } /* Giallo */
.category-PR-AC .category-header { background-color: #7030A0; } /* Viola */
.category-PR-AT .category-header { background-color: #30a06f; } /* Viola */
.category-PR-IP .category-header { background-color: #C55A11; } /* Arancione */
.category-PR-PT .category-header { background-color: #4e250a; } /* Marrone */
.category-MI-MI .category-header { background-color: #548235; } /* Verde */
.category-RS-MI .category-header { background-color: #C00000; } /* Rosso */

.calculation-row {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    padding: 15px;
    background-color: var(--white);
    border-top: 1px solid var(--border-color);
}

.row-main {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}
.row-main .description { font-size: 0.95rem; font-weight: 500; }
.row-main .sub-total { font-size: 1rem; font-weight: 600; white-space: nowrap; margin-left: 15px; }

.row-details {
    font-size: 0.85rem;
    color: var(--detail-text-color);
    margin-top: 8px;
}

.total-section {
    background-color: var(--primary-color);
    color: var(--white);
    margin-top: 30px;
    padding: 25px;
    border-radius: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.total-label { font-size: 1.2rem; font-weight: 600; }
.total-value { font-size: 2.2rem; font-weight: 700; }