/* ============================================ */
/* ROOT ПЕРЕМЕННЫЕ (ЦВЕТОВАЯ СХЕМА) */
/* ============================================ */
:root {
    /* Основные цвета */
    --primary: #667eea;
    --primary-dark: #5a67d8;
    --primary-light: #7f9cf5;
    --secondary: #764ba2;
    --secondary-dark: #6b3fa0;
    --secondary-light: #8b5cb8;
    
    /* Фоновые цвета */
    --bg-gradient-start: #667eea;
    --bg-gradient-end: #764ba2;
    --bg-white: #ffffff;
    --bg-light: #f8f9fa;
    --bg-gray: #e9ecef;
    
    /* Текст */
    --text-dark: #2d3748;
    --text-gray: #4a5568;
    --text-light: #718096;
    --text-white: #ffffff;
    
    /* Статусы */
    --success: #28a745;
    --success-light: #d1e7dd;
    --warning: #ffc107;
    --warning-light: #fff3cd;
    --danger: #dc3545;
    --danger-light: #f8d7da;
    --info: #17a2b8;
    --info-light: #cfe2ff;
    --secondary-status: #6c757d;
    --secondary-light-status: #e9ecef;
    
    /* Тени */
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.1);
    --shadow-md: 0 5px 15px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 30px rgba(0,0,0,0.15);
    --shadow-hover: 0 10px 25px rgba(0,0,0,0.2);
    
    /* Скругления */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 15px;
    --radius-xl: 20px;
    
    /* Анимации */
    --transition-fast: 0.2s;
    --transition-normal: 0.3s;
    --transition-slow: 0.5s;
}

/* ============================================ */
/* ГЛОБАЛЬНЫЕ СТИЛИ */
/* ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
    min-height: 100vh;
}

/* ============================================ */
/* НАВИГАЦИЯ */
/* ============================================ */
.navbar-custom {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-md);
    padding: 0.8rem 0;
    backdrop-filter: blur(10px);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.3rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.navbar-brand i {
    background: none;
    -webkit-text-fill-color: var(--primary);
    color: var(--primary);
    margin-right: 8px;
}

.nav-link {
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    margin: 0 2px;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast) ease;
    color: var(--text-gray) !important;
}

.nav-link:hover {
    background: linear-gradient(135deg, var(--primary)15 0%, var(--secondary)15 100%);
    color: var(--primary) !important;
    transform: translateY(-2px);
}

.nav-link.active {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: var(--text-white) !important;
    box-shadow: 0 4px 10px rgba(102, 126, 234, 0.3);
}

/* ============================================ */
/* КАРТОЧКИ */
/* ============================================ */
.card {
    border: none;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    overflow: hidden;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.card-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: var(--text-white);
    border: none;
    padding: 1rem 1.5rem;
}

/* ============================================ */
/* КНОПКИ */
/* ============================================ */
.btn {
    border-radius: var(--radius-sm);
    padding: 8px 20px;
    font-weight: 500;
    transition: all var(--transition-fast);
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: var(--text-white);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--secondary) 0%, var(--primary) 100%);
    transform: scale(1.02);
}

.btn-success {
    background: var(--success);
}

.btn-warning {
    background: var(--warning);
    color: var(--text-dark);
}

.btn-danger {
    background: var(--danger);
}

.btn-info {
    background: var(--info);
}

.btn-secondary {
    background: var(--secondary-status);
}

/* ============================================ */
/* ТАБЛИЦЫ */
/* ============================================ */
.table {
    border-radius: var(--radius-md);
    overflow: hidden;
}

.table thead th {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: var(--text-white);
    border: none;
    padding: 12px;
}

.table tbody tr {
    transition: background var(--transition-fast);
}

.table tbody tr:hover {
    background: var(--bg-light);
}

/* ============================================ */
/* ФИЛЬТРЫ */
/* ============================================ */
.filter-panel {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: var(--shadow-sm);
}

/* ============================================ */
/* СТАТУСЫ */
/* ============================================ */
.status-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75em;
    font-weight: bold;
}

.status-active { background: var(--success-light); color: #0f5132; }
.status-repair { background: var(--warning-light); color: #856404; }
.status-retired { background: var(--danger-light); color: #721c24; }
.status-reserve { background: var(--info-light); color: #084298; }

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

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

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.pulse:hover {
    animation: pulse 0.5s ease;
}

/* ============================================ */
/* АДАПТИВНОСТЬ */
/* ============================================ */
@media (max-width: 768px) {
    .navbar-brand { font-size: 1rem; }
    .nav-link { font-size: 0.85rem; padding: 0.5rem 0.8rem !important; }
    .card-header h4, .card-header h5 { font-size: 1rem; }
    .table { font-size: 0.85rem; }
    .btn { padding: 6px 12px; font-size: 0.85rem; }
}

/* ============================================ */
/* СКРОЛЛБАР */
/* ============================================ */
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--bg-gray); border-radius: 5px; }
::-webkit-scrollbar-thumb { background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%); border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: var(--secondary); }