/* Custom CSS for Calorie Calculator */

:root {
    --primary-color: #0066cc;
    --secondary-color: #f8f9fa;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --info-color: #17a2b8;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

/* Header Styling */
.display-4 {
    color: var(--primary-color);
    font-weight: 600;
}

/* Card Styling */
.card {
    border: none;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    border-radius: 8px;
    margin-bottom: 2rem;
}

.card-header {
    background-color: var(--primary-color);
    color: white;
    border-radius: 8px 8px 0 0 !important;
    border: none;
    padding: 1rem 1.5rem;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
}

/* Tab Styling */
.nav-tabs {
    border-bottom: 2px solid #dee2e6;
}

.nav-tabs .nav-link {
    color: var(--primary-color);
    border: 1px solid transparent;
    font-weight: 500;
}

.nav-tabs .nav-link:hover {
    border-color: #e9ecef #e9ecef #dee2e6;
    color: var(--primary-color);
}

.nav-tabs .nav-link.active {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

/* Form Styling */
.form-label {
    font-weight: 600;
    color: #495057;
    margin-bottom: 0.5rem;
}

.form-control, .form-select {
    border-radius: 6px;
    border: 1px solid #ced4da;
    padding: 0.75rem;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(0, 102, 204, 0.25);
}

.form-text {
    font-size: 0.875rem;
    color: #6c757d;
}

/* Button Styling */
.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    font-weight: 600;
    padding: 0.75rem 2rem;
    border-radius: 6px;
}

.btn-primary:hover {
    background-color: #0056b3;
    border-color: #0056b3;
}

.btn-outline-secondary {
    border-radius: 6px;
}

/* Settings Panel */
.settings-panel {
    background-color: #f8f9fa;
    padding: 1rem;
    border-radius: 6px;
    border: 1px solid #e9ecef;
}

/* Results Styling */
.result-item {
    font-size: 2rem;
    color: var(--primary-color);
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.result-item strong {
    font-size: 2.5rem;
}

.unit-label {
    font-size: 0.875rem;
    color: #6c757d;
}

/* BMI Gauge Styling */
.bmi-gauge {
    text-align: center;
}

.bmi-value h2 {
    color: var(--primary-color);
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.bmi-scale {
    margin: 2rem 0;
}

.scale-bar {
    display: flex;
    height: 30px;
    border-radius: 15px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.scale-section {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 0.75rem;
}

.scale-section.underweight {
    background-color: #17a2b8;
}

.scale-section.normal {
    background-color: var(--success-color);
}

.scale-section.overweight {
    background-color: var(--warning-color);
}

.scale-section.obesity {
    background-color: var(--danger-color);
}

.scale-numbers {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: #6c757d;
    padding: 0 0.5rem;
}

/* Table Styling */
.table {
    margin-bottom: 0;
}

.table td, .table th {
    padding: 0.5rem;
    border-top: 1px solid #dee2e6;
}

.table-warning {
    background-color: rgba(255, 193, 7, 0.1);
}

/* Alert Styling */
.alert {
    border-radius: 6px;
    border: none;
}

.alert-info {
    background-color: rgba(23, 162, 184, 0.1);
    color: #0c5460;
    border-left: 4px solid var(--info-color);
}

.alert-light {
    background-color: #f8f9fa;
    border-left: 4px solid #6c757d;
}

/* Input Group Styling */
.input-group-text {
    background-color: #e9ecef;
    border-color: #ced4da;
    color: #495057;
    font-weight: 500;
}

/* Radio Button Styling */
.form-check-input:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.form-check-label {
    font-weight: 500;
    color: #495057;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .result-item {
        font-size: 1.5rem;
    }
    
    .result-item strong {
        font-size: 2rem;
    }
    
    .btn-lg {
        padding: 0.75rem 1.5rem;
        font-size: 1rem;
    }
    
    .scale-section {
        font-size: 0.6rem;
    }
}

/* Print Styles */
@media print {
    .btn, .nav-tabs, .settings-panel {
        display: none !important;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #dee2e6;
    }
    
    .card-header {
        background-color: #f8f9fa !important;
        color: #333 !important;
    }
}

/* Loading Animation */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.loading::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Error Styling */
.error {
    color: var(--danger-color);
    font-weight: 600;
    background-color: rgba(220, 53, 69, 0.1);
    padding: 0.75rem;
    border-radius: 6px;
    border-left: 4px solid var(--danger-color);
    margin: 1rem 0;
}

/* Success Styling */
.success {
    color: var(--success-color);
    font-weight: 600;
    background-color: rgba(40, 167, 69, 0.1);
    padding: 0.75rem;
    border-radius: 6px;
    border-left: 4px solid var(--success-color);
    margin: 1rem 0;
}

/* Footer Styling */
footer {
    margin-top: auto;
    border-top: 1px solid #dee2e6;
}

.footer-links a {
    color: #6c757d;
    font-weight: 500;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--primary-color);
}

/* Contact Info Styling */
.contact-info .fas {
    width: 20px;
    text-align: center;
}

/* Breadcrumb Styling */
.breadcrumb {
    background-color: transparent;
    padding: 0;
}

.breadcrumb-item + .breadcrumb-item::before {
    color: #6c757d;
}

.breadcrumb-item a {
    color: var(--primary-color);
    text-decoration: none;
}

.breadcrumb-item a:hover {
    text-decoration: underline;
}