/* Calculators Page Styles */
.calculator-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.calculator-card {
    background: white;
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.calculator-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
}

.calculator-icon {
    font-size: 48px;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.calculator-card h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: #077c0b;
}

.calculator-card p {
    color: #e5edee;
    margin-bottom: 15px;
    font-size: 14px;
}

.calculator-actions {
    display: flex;
    gap: 10px;
}

.btn-sm {
    padding: 8px 15px;
    font-size: 12px;
}

.filter-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    background: white;
    padding: 10px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.filter-tab {
    padding: 10px 20px;
    background: #f8f9fa;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-weight: bold;
    color: #7f8c8d;
    transition: all 0.3s ease;
}

.filter-tab.active,
.filter-tab:hover {
    background: #3498db;
    color: white;
}

.search-bar {
    margin-bottom: 20px;
}

.search-bar input {
    width: 100%;
    padding: 12px 20px;
    border: 1px solid #ddd;
    border-radius: 25px;
    font-size: 14px;
    background: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.search-bar input:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

/* Calculator Form Styles */
.calculator-form {
    background: white;
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
}

.calculator-form .form-group {
    margin-bottom: 20px;
}

.calculator-form label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
    color: #2c3e50;
}

.calculator-form input,
.calculator-form select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
}

.calculator-form input:focus,
.calculator-form select:focus {
    border-color: #3498db;
    outline: none;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

/* Calculator Results Styles */
.calculator-results {
    background: white;
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    margin-top: 20px;
}

.calculator-results h3 {
    font-size: 18px;
    margin-bottom: 20px;
    color: #2c3e50;
}

.result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    background: #f8f9fa;
    margin-bottom: 10px;
    border-radius: 5px;
    border-left: 4px solid #3498db;
}

.result-label {
    font-weight: bold;
    color: #2c3e50;
}

.result-value {
    font-weight: bold;
    color: #2ecc71;
    font-size: 18px;
}

.result-unit {
    color: #7f8c8d;
    margin-right: 5px;
}

/* Calculator Info Styles */
.calculator-info {
    background: white;
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
}

.calculator-info h3 {
    font-size: 18px;
    margin-bottom: 15px;
    color: #2c3e50;
}

.calculator-info p {
    color: #7f8c8d;
    line-height: 1.6;
    margin-bottom: 15px;
}

.calculator-info .info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-top: 15px;
}

.calculator-info .info-item {
    padding: 10px;
    background: #f8f9fa;
    border-radius: 5px;
}

.calculator-info .info-label {
    font-size: 12px;
    color: #7f8c8d;
    margin-bottom: 5px;
}

.calculator-info .info-value {
    font-weight: bold;
    color: #2c3e50;
}

/* Responsive Design */
@media (max-width: 768px) {
    .calculator-grid {
        grid-template-columns: 1fr;
    }

    .filter-tabs {
        flex-wrap: wrap;
    }

    .filter-tab {
        flex: 1;
        min-width: 100px;
    }

    .calculator-actions {
        flex-direction: column;
    }

    .calculator-actions .btn {
        width: 100%;
    }
}

/* Loading Animation */
.loading-spinner {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

/* Error Message */
.error-message {
    background: #ffebee;
    padding: 15px;
    border-radius: 8px;
    margin-top: 15px;
    border-left: 4px solid #e53935;
    color: #b71c1c;
}

/* Success Message */
.success-message {
    background: #e8f5e9;
    padding: 15px;
    border-radius: 8px;
    margin-top: 15px;
    border-left: 4px solid #2e7d32;
    color: #2e7d32;
}

/* Calculator Modal Overlay */
.calc-modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 9999;
    justify-content: center;
    align-items: flex-start;
    padding: 30px;
    overflow-y: auto;
}

.calc-modal-overlay.active {
    display: flex;
}

.calc-modal {
    background: white;
    border-radius: 12px;
    width: 100%;
    max-width: 720px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: modalIn 0.25s ease;
    margin: auto;
}

@keyframes modalIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.calc-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 25px;
    border-bottom: 1px solid #ecf0f1;
}

.calc-modal-header h2 {
    font-size: 18px;
    color: #2c3e50;
    margin: 0;
}

.calc-modal-header .modal-discipline {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 3px 10px;
    border-radius: 12px;
    font-weight: 600;
}

.calc-modal-header .modal-discipline.electrical {
    background: #fef3cd;
    color: #856404;
}

.calc-modal-header .modal-discipline.mechanical {
    background: #d1ecf1;
    color: #0c5460;
}

.calc-modal-header .modal-discipline.civil {
    background: #d4edda;
    color: #155724;
}

.calc-modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: #7f8c8d;
    padding: 0 5px;
    line-height: 1;
}

.calc-modal-close:hover {
    color: #e74c3c;
}

.calc-modal-body {
    padding: 25px;
    max-height: 65vh;
    overflow-y: auto;
}

.calc-modal-equation {
    background: #f7f9fc;
    border: 1px solid #dce1e7;
    border-radius: 8px;
    padding: 12px 18px;
    margin-bottom: 20px;
    text-align: center;
    font-family: 'Cambria Math', 'Times New Roman', serif;
    font-size: 15px;
    color: #2c3e50;
}

.calc-modal-body .input-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.calc-modal-body .input-group {
    display: flex;
    flex-direction: column;
}

.calc-modal-body .input-group label {
    font-size: 12px;
    font-weight: 600;
    color: #34495e;
    margin-bottom: 4px;
}

.calc-modal-body .input-group .input-hint {
    font-size: 10px;
    color: #95a5a6;
    margin-bottom: 2px;
}

.calc-modal-body .input-group input,
.calc-modal-body .input-group select {
    padding: 9px 12px;
    border: 1px solid #dce1e7;
    border-radius: 6px;
    font-size: 13px;
    transition: border-color 0.2s;
}

.calc-modal-body .input-group input:focus,
.calc-modal-body .input-group select:focus {
    border-color: #3498db;
    outline: none;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.calc-modal-footer {
    padding: 15px 25px;
    border-top: 1px solid #ecf0f1;
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

.calc-modal-footer .btn {
    padding: 10px 22px;
    border: none;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    font-size: 13px;
    transition: all 0.2s;
}

.calc-modal-footer .btn-calculate {
    background: #3498db;
    color: white;
}

.calc-modal-footer .btn-calculate:hover {
    background: #2980b9;
}

.calc-modal-footer .btn-calculate:active {
    background: white;
    color: #3498db;
    transform: scale(0.97);
}

.calc-modal-footer .btn-calculate:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.calc-modal-footer .btn-report {
    background: #27ae60;
    color: white;
    display: none;
}

.calc-modal-footer .btn-report:hover {
    background: #219a52;
}

.calc-modal-footer .btn-cancel {
    background: #ecf0f1;
    color: #7f8c8d;
}

.calc-modal-footer .btn-cancel:hover {
    background: #dce1e7;
}

/* Results section inside modal */
.calc-modal-results {
    display: none;
    margin-top: 20px;
    border-top: 2px solid #3498db;
    padding-top: 18px;
}

.calc-modal-results.active {
    display: block;
}

.calc-modal-results h3 {
    font-size: 15px;
    color: #2c3e50;
    margin-bottom: 12px;
}

.calc-modal-results .compliance-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 600;
    background: #d5f5e3;
    color: #27ae60;
    margin-bottom: 12px;
}

.calc-modal-results .results-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.calc-modal-results .result-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    background: #f7f9fc;
    border-radius: 6px;
    border-left: 3px solid #3498db;
}

.calc-modal-results .result-row .r-label {
    font-size: 12px;
    color: #7f8c8d;
}

.calc-modal-results .result-row .r-value {
    font-weight: 700;
    color: #2c3e50;
    font-size: 14px;
}

.calc-modal-results .result-error {
    background: #ffebee;
    border-left: 3px solid #e74c3c;
    padding: 12px 15px;
    border-radius: 6px;
    color: #c0392b;
    font-size: 13px;
}

/* Info modal */
.calc-info-section {
    margin-bottom: 15px;
}

.calc-info-section h4 {
    font-size: 13px;
    color: #34495e;
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.calc-info-vars {
    width: 100%;
    border-collapse: collapse;
    font-size: 12px;
}

.calc-info-vars th {
    background: #2c3e50;
    color: white;
    padding: 6px 10px;
    text-align: left;
}

.calc-info-vars td {
    padding: 6px 10px;
    border-bottom: 1px solid #ecf0f1;
}

.calc-info-vars tr:nth-child(even) {
    background: #f7f9fc;
}

@media (max-width: 768px) {
    .calc-modal-body .input-grid {
        grid-template-columns: 1fr;
    }

    .calc-modal-results .results-grid {
        grid-template-columns: 1fr;
    }

    .calc-modal {
        margin: 10px;
    }
}