/* Основные стили */
:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --light-color: #f8f9fa;
    --dark-color: #212529;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    background-color: #f8f9fa;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

/* Карточки */
.card {
    border: none;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
    margin-bottom: 20px;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.card-header {
    border-radius: 15px 15px 0 0 !important;
    font-weight: 600;
    padding: 1rem 1.5rem;
}

/* Кнопки */
.btn {
    border-radius: 8px;
    font-weight: 500;
    transition: all 0.3s ease;
    border: none;
}

.btn-lg {
    padding: 12px 24px;
    font-size: 1.1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), #0b5ed7);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #0b5ed7, #0a58ca);
    transform: translateY(-2px);
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color), #157347);
}

.btn-success:hover {
    background: linear-gradient(135deg, #157347, #13653f);
    transform: translateY(-2px);
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning-color), #ffca2c);
    color: #000;
}

.btn-warning:hover {
    background: linear-gradient(135deg, #ffca2c, #ffc720);
    transform: translateY(-2px);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger-color), #bb2d3b);
}

.btn-danger:hover {
    background: linear-gradient(135deg, #bb2d3b, #b02a37);
    transform: translateY(-2px);
}

.btn-outline-primary:hover {
    background-color: var(--primary-color);
    color: white;
}

/* Формы */
.form-control, .form-select {
    border-radius: 8px;
    padding: 12px 15px;
    border: 2px solid #e0e0e0;
    transition: all 0.3s ease;
    font-size: 1rem;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
    transform: translateY(-1px);
}

.form-label {
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--dark-color);
}

.input-group-text {
    border-radius: 8px 0 0 8px;
    background-color: #f8f9fa;
    border: 2px solid #e0e0e0;
    border-right: none;
}

/* Алерты */
.alert {
    border-radius: 10px;
    border: none;
    padding: 1rem 1.5rem;
}

.alert-success {
    background-color: rgba(25, 135, 84, 0.1);
    color: var(--success-color);
    border-left: 4px solid var(--success-color);
}

.alert-warning {
    background-color: rgba(255, 193, 7, 0.1);
    color: #856404;
    border-left: 4px solid var(--warning-color);
}

.alert-danger {
    background-color: rgba(220, 53, 69, 0.1);
    color: var(--danger-color);
    border-left: 4px solid var(--danger-color);
}

.alert-info {
    background-color: rgba(13, 202, 240, 0.1);
    color: #055160;
    border-left: 4px solid #0dcaf0;
}

/* Таблицы */
.table {
    margin-bottom: 0;
    font-size: 0.95rem;
}

.table thead th {
    border-bottom: 2px solid #dee2e6;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.9em;
    letter-spacing: 0.5px;
    padding: 1rem;
}

.table tbody td {
    padding: 1rem;
    vertical-align: middle;
}

.table-hover tbody tr:hover {
    background-color: rgba(13, 110, 253, 0.05);
}

/* Навигация */
.navbar {
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    padding: 1rem 0;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.3em;
    display: flex;
    align-items: center;
    gap: 10px;
}

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

.nav-link {
    font-weight: 500;
    transition: color 0.3s ease;
    padding: 0.5rem 1rem;
    border-radius: 5px;
}

.nav-link:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: white !important;
}

/* Футер */
footer {
    margin-top: auto;
    background-color: var(--dark-color);
}

footer h5 {
    font-weight: 600;
    margin-bottom: 1rem;
}

footer p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 0.5rem;
}

/* Адаптивность */
@media (max-width: 768px) {
    .card {
        margin-bottom: 15px;
    }
    
    .btn {
        width: 100%;
        margin-bottom: 10px;
    }
    
    .table-responsive {
        font-size: 0.9em;
        border: 1px solid #dee2e6;
        border-radius: 8px;
    }
    
    .navbar-collapse {
        background-color: var(--primary-color);
        padding: 1rem;
        border-radius: 8px;
        margin-top: 10px;
    }
    
    .display-4 {
        font-size: 2.5rem;
    }
}

/* Анимации */
@keyframes fadeIn {
    from { 
        opacity: 0; 
        transform: translateY(20px); 
    }
    to { 
        opacity: 1; 
        transform: translateY(0); 
    }
}

.fade-in {
    animation: fadeIn 0.5s ease-out;
}

/* Кастомные классы */
.status-badge {
    font-size: 0.8em;
    padding: 5px 10px;
    border-radius: 20px;
    font-weight: 600;
}

.stat-card {
    border-radius: 15px;
    overflow: hidden;
    cursor: pointer;
}

.stat-card .card-body {
    padding: 1.5rem;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 5px solid #f3f3f3;
    border-top: 5px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 20px auto;
}

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

/* Progress bars */
.progress {
    height: 10px;
    border-radius: 5px;
    background-color: #e9ecef;
}

.progress-bar {
    border-radius: 5px;
    background: linear-gradient(90deg, #198754, #20c997);
}

/* Badges */
.badge {
    font-weight: 600;
    padding: 6px 12px;
    font-size: 0.85em;
}

/* Pagination */
.pagination {
    justify-content: center;
}

.page-item.active .page-link {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.page-link {
    color: var(--primary-color);
    border-radius: 5px;
    margin: 0 3px;
    padding: 8px 15px;
    border: 1px solid #dee2e6;
    transition: all 0.3s;
}

.page-link:hover {
    color: var(--primary-color);
    background-color: #e9ecef;
    transform: translateY(-2px);
}

/* Utility classes */
.text-small {
    font-size: 0.9em;
}

.text-tiny {
    font-size: 0.8em;
}

.cursor-pointer {
    cursor: pointer;
}

.rotate {
    animation: rotate 2s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Заголовки */
.display-4 {
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--success-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Иконки */
.bi {
    vertical-align: middle;
}

/* Валидация форм */
.is-invalid {
    border-color: var(--danger-color) !important;
}

.is-valid {
    border-color: var(--success-color) !important;
}

.invalid-feedback {
    display: block;
    font-size: 0.875em;
    margin-top: 0.25rem;
}

/* Спиннеры */
.spinner-border {
    vertical-align: middle;
}

/* Сетка */
.row.g-3 {
    margin-bottom: 1rem;
}

/* Утилиты для текста */
.text-muted {
    opacity: 0.8;
}

/* Тень для кнопок при наведении */
.btn:hover {
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}