/* Reset e impostazioni di base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: #f9fafb;
    color: #1f2937;
    line-height: 1.6;
    padding: 0;
    margin: 0;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Card comune */
.card {
    background-color: #ffffff;
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05), 0 1px 2px rgba(0, 0, 0, 0.1);
    border: 1px solid #e5e7eb;
    transition: box-shadow 0.2s ease;
}

.card:hover {
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 32px;
    padding: 0 16px;
}

.site-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #111827;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.site-title i {
    color: #10b981;
}

.site-description {
    font-size: 1.125rem;
    color: #6b7280;
    max-width: 700px;
    margin: 0 auto;
}

/* Sezione Input */
.input-container {
    width: 100%;
}

.input-label {
    display: block;
    font-weight: 600;
    margin-bottom: 12px;
    font-size: 1.125rem;
    color: #374151;
    display: flex;
    align-items: center;
    gap: 8px;
}

.input-label i {
    color: #10b981;
}

.input-group {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
}

.ip-input {
    flex: 1;
    padding: 14px 16px;
    border: 2px solid #d1d5db;
    border-radius: 8px;
    font-size: 1rem;
    font-family: 'Inter', monospace;
    transition: all 0.2s ease;
    color: #111827;
}

.ip-input:focus {
    outline: none;
    border-color: #10b981;
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

.ip-input::placeholder {
    color: #9ca3af;
}

.calculate-btn {
    background-color: #10b981;
    color: white;
    border: none;
    border-radius: 8px;
    padding: 14px 24px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
}

.calculate-btn:hover {
    background-color: #0da271;
    transform: translateY(-1px);
}

.calculate-btn:active {
    transform: translateY(0);
}

.input-hint {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 0.875rem;
    color: #6b7280;
}

.hint-title {
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
}

.hint-example {
    background-color: #f3f4f6;
    padding: 4px 10px;
    border-radius: 6px;
    font-family: monospace;
    color: #4b5563;
    cursor: pointer;
    transition: all 0.2s ease;
}

.hint-example:hover {
    background-color: #e5e7eb;
    color: #10b981;
    transform: translateY(-1px);
}

/* Messaggio di errore */
.error-message {
    margin-top: 16px;
    padding: 12px 16px;
    background-color: #fee2e2;
    border: 1px solid #fecaca;
    border-radius: 8px;
    color: #dc2626;
    font-weight: 500;
    display: none;
}

.error-message.show {
    display: block;
}

/* Messaggio placeholder */
.placeholder-message {
    text-align: center;
    padding: 40px 20px;
    color: #6b7280;
}

.placeholder-icon {
    font-size: 3rem;
    color: #d1d5db;
    margin-bottom: 16px;
}

.placeholder-message h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #4b5563;
    margin-bottom: 12px;
}

.placeholder-message p {
    max-width: 500px;
    margin: 0 auto;
    font-size: 1.125rem;
    line-height: 1.7;
}

.placeholder-info {
    text-align: center;
    padding: 20px;
    color: #6b7280;
    font-style: italic;
}

/* Sezione Risultati */
.section-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 24px;
    color: #111827;
    display: flex;
    align-items: center;
    gap: 10px;
}

.section-title i {
    color: #10b981;
}

.results-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.result-row {
    display: flex;
    align-items: flex-start;
    padding: 16px;
    border-radius: 8px;
    transition: background-color 0.2s ease;
}

.result-row:hover {
    background-color: #f9fafb;
}

.result-row:nth-child(odd) {
    background-color: #f9fafb;
}

.result-row:nth-child(odd):hover {
    background-color: #f3f4f6;
}

.result-label {
    font-weight: 600;
    color: #374151;
    width: 180px;
    min-width: 180px;
    padding-right: 16px;
    font-size: 1rem;
}

.result-value {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.decimal-value {
    font-size: 1.125rem;
    font-weight: 600;
    color: #111827;
    font-family: monospace;
}

.binary-value {
    font-size: 0.875rem;
    color: #6b7280;
    font-family: 'Courier New', monospace;
    background-color: #f3f4f6;
    padding: 6px 10px;
    border-radius: 4px;
    word-break: break-all;
}

.cidr-desc {
    font-size: 0.875rem;
    font-weight: normal;
    color: #6b7280;
    margin-left: 8px;
    font-family: 'Inter', sans-serif;
}

/* Sezione Informazioni Aggiuntive */
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.info-label {
    font-weight: 600;
    color: #4b5563;
    font-size: 0.875rem;
}

.info-value {
    font-size: 1rem;
    color: #111827;
}

.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 600;
}

.badge.private {
    background-color: #d1fae5;
    color: #065f46;
}

.badge.public {
    background-color: #dbeafe;
    color: #1e40af;
}

.badge.default {
    background-color: #f3f4f6;
    color: #4b5563;
}

/* Footer */
.footer {
    text-align: center;
    padding: 32px 0 16px;
    color: #6b7280;
    font-size: 0.875rem;
    border-top: 1px solid #e5e7eb;
    margin-top: 24px;
}

.footer-note {
    margin-top: 8px;
    font-size: 0.75rem;
}

.footer a {
    color: #10b981;
    text-decoration: none;
    font-weight: 500;
}

.footer a:hover {
    text-decoration: underline;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 16px;
    }
    
    .site-title {
        font-size: 2rem;
        flex-direction: column;
        gap: 8px;
    }
    
    .input-group {
        flex-direction: column;
    }
    
    .calculate-btn {
        width: 100%;
        justify-content: center;
    }
    
    .result-row {
        flex-direction: column;
        gap: 12px;
    }
    
    .result-label {
        width: 100%;
        padding-right: 0;
    }
    
    .info-grid {
        grid-template-columns: 1fr;
    }
    
    .placeholder-message {
        padding: 30px 15px;
    }
    
    .placeholder-icon {
        font-size: 2.5rem;
    }
}

@media (max-width: 480px) {
    .site-title {
        font-size: 1.75rem;
    }
    
    .card {
        padding: 20px;
    }
    
    .placeholder-message h3 {
        font-size: 1.25rem;
    }
    
    .placeholder-message p {
        font-size: 1rem;
    }
}