/* Custom CSS for Brain Tumor AI Platform */

:root {
    --primary-color: #4b5563;
    --primary-dark: #374151;
    --primary-darker: #1f2937;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;
    --grey-50: #f9fafb;
    --grey-100: #f3f4f6;
    --grey-200: #e5e7eb;
    --grey-300: #d1d5db;
    --grey-400: #9ca3af;
    --grey-500: #6b7280;
    --grey-600: #4b5563;
    --grey-700: #374151;
    --grey-800: #1f2937;
    --grey-900: #111827;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f9fafb;
}

/* Navigation */
.navbar {
    background-color: var(--grey-700) !important;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.navbar-dark .navbar-nav .nav-link {
    color: rgba(255, 255, 255, 0.9);
    transition: color 0.2s ease;
}

.navbar-dark .navbar-nav .nav-link:hover,
.navbar-dark .navbar-nav .nav-link:focus {
    color: #ffffff;
}

.navbar-brand {
    font-weight: 600;
    font-size: 1.5rem;
}

/* Cards */
.card {
    border: none;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.card-header {
    background-color: #f8f9fa;
    border-bottom: 1px solid #dee2e6;
    font-weight: 600;
}

/* Progress Bars */
.progress {
    background-color: #e9ecef;
    border-radius: 4px;
}

.progress-bar {
    transition: width 0.3s ease;
}

/* Badges */
.badge {
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
    font-weight: 500;
}

/* Buttons */
.btn {
    border-radius: 6px;
    font-weight: 500;
    transition: all 0.2s ease;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.btn-primary {
    background-color: var(--grey-600);
    border-color: var(--grey-600);
}

.btn-primary:hover {
    background-color: var(--grey-700);
    border-color: var(--grey-700);
}

.btn-primary:focus,
.btn-primary:active {
    background-color: var(--grey-800);
    border-color: var(--grey-800);
}

/* Forms */
.form-control {
    border-radius: 6px;
    border: 1px solid var(--grey-300);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus {
    border-color: var(--grey-500);
    box-shadow: 0 0 0 0.2rem rgba(107, 114, 128, 0.15);
}

.form-control.is-invalid {
    border-color: #dc3545;
}

.form-control.is-invalid:focus {
    border-color: #dc3545;
    box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.25);
}

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

.table thead {
    background-color: #f8f9fa;
    font-weight: 600;
}

.table tbody tr {
    border-bottom: 1px solid #dee2e6;
    transition: background-color 0.2s;
}

.table tbody tr:hover {
    background-color: #f5f5f5;
}

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

.alert-info {
    background-color: #e7f3ff;
    color: #004085;
}

.alert-warning {
    background-color: #fff3cd;
    color: #856404;
}

.alert-danger {
    background-color: #f8d7da;
    color: #721c24;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
}

/* Main Content */
main {
    min-height: calc(100vh - 200px);
}

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

/* Dashboard Stats Cards */
.bg-primary {
    background-color: var(--grey-600) !important;
}

.bg-success {
    background-color: var(--success-color) !important;
}

.bg-danger {
    background-color: var(--danger-color) !important;
}

.bg-warning {
    background-color: var(--warning-color) !important;
}

.bg-info {
    background-color: var(--info-color) !important;
}

/* Responsive */
@media (max-width: 768px) {
    .navbar-brand {
        font-size: 1.2rem;
    }

    .card {
        margin-bottom: 1rem;
    }

    h1 {
        font-size: 1.75rem;
    }

    h2 {
        font-size: 1.5rem;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card {
    animation: fadeIn 0.3s ease;
}

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

/* Border Dashed */
.border-dashed {
    border-style: dashed !important;
}

/* Text Utilities */
.text-success {
    color: var(--success-color) !important;
}

.text-danger {
    color: var(--danger-color) !important;
}

.text-warning {
    color: var(--warning-color) !important;
}

.text-info {
    color: var(--info-color) !important;
}

.text-muted {
    color: var(--grey-500) !important;
}

.text-primary {
    color: var(--grey-700) !important;
}