/**
 * Dark Theme CSS for AI Live Task Manager
 * Modern, visually appealing dark theme based on Bootstrap 5
 */

:root {
    /* Основные цвета фона */
    --bg-primary: #0f172a;      /* slate-900 */
    --bg-secondary: #1e293b;    /* slate-800 */
    --bg-tertiary: #334155;     /* slate-700 */
    --bg-card: #1e293b;         /* slate-800 */
    --bg-input: #0f172a;        /* slate-900 */
    
    /* Акцентные цвета */
    --accent-primary: #6366f1;  /* indigo-500 */
    --accent-primary-hover: #4f46e5; /* indigo-600 */
    --accent-secondary: #8b5cf6; /* violet-500 */
    --accent-secondary-hover: #7c3aed; /* violet-600 */
    --accent-tertiary: #06b6d4;  /* cyan-500 */
    --accent-tertiary-hover: #0891b2; /* cyan-600 */
    
    /* Текст */
    --text-primary: #f8fafc;    /* slate-50 */
    --text-secondary: #94a3b8;  /* slate-400 */
    --text-muted: #64748b;      /* slate-500 */
    
    /* Градиенты */
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --gradient-secondary: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
    --gradient-success: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --gradient-danger: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    --gradient-warning: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    
    /* Тени */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6), 0 10px 10px -5px rgba(0, 0, 0, 0.5);
    
    /* Переходы */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Базовые стили */
body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
}

/* Navbar */
.navbar {
    background: var(--gradient-primary) !important;
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(10px);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    color: white !important;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.nav-link {
    color: rgba(255, 255, 255, 0.9) !important;
    font-weight: 500;
    transition: all var(--transition-base);
    border-radius: 0.375rem;
    padding: 0.5rem 1rem !important;
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

/* Карточки */
.card {
    background-color: var(--bg-card);
    border: 1px solid var(--bg-tertiary);
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    overflow: hidden;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--accent-primary);
}

.card-header {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--bg-tertiary);
    font-weight: 600;
    color: var(--text-primary);
}

.card-body {
    color: var(--text-primary);
}

.card-title {
    color: var(--text-primary);
    font-weight: 600;
}

.card-text {
    color: var(--text-secondary);
}

/* Кнопки */
.btn {
    font-weight: 600;
    border-radius: 0.5rem;
    padding: 0.625rem 1.25rem;
    transition: all var(--transition-base);
    border: none;
    text-transform: none;
    letter-spacing: 0.025em;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background: var(--gradient-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--gradient-secondary);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-secondary:hover {
    background: var(--gradient-secondary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-success {
    background: var(--gradient-success);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-success:hover {
    background: var(--gradient-success);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-danger {
    background: var(--gradient-danger);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-danger:hover {
    background: var(--gradient-danger);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-warning {
    background: var(--gradient-warning);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-warning:hover {
    background: var(--gradient-warning);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline-primary {
    border: 2px solid var(--accent-primary);
    color: var(--accent-primary);
    background: transparent;
}

.btn-outline-primary:hover {
    background: var(--accent-primary);
    color: white;
    transform: translateY(-2px);
}

.btn-outline-secondary {
    border: 2px solid var(--accent-secondary);
    color: var(--accent-secondary);
    background: transparent;
}

.btn-outline-secondary:hover {
    background: var(--accent-secondary);
    color: white;
    transform: translateY(-2px);
}

/* Формы */
.form-control,
.form-select {
    background-color: var(--bg-input);
    border: 2px solid var(--bg-tertiary);
    border-radius: 0.5rem;
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    transition: all var(--transition-base);
}

.form-control:focus,
.form-select:focus {
    background-color: var(--bg-input);
    border-color: var(--accent-primary);
    color: var(--text-primary);
    box-shadow: 0 0 0 0.25rem rgba(99, 102, 241, 0.25);
}

.form-control::placeholder {
    color: var(--text-muted);
}

.form-label {
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.form-check-input {
    background-color: var(--bg-input);
    border-color: var(--bg-tertiary);
}

.form-check-input:checked {
    background-color: var(--accent-primary);
    border-color: var(--accent-primary);
}

.form-check-label {
    color: var(--text-primary);
}

/* Таблицы */
.table {
    color: var(--text-primary);
    background-color: var(--bg-card);
    border-radius: 0.5rem;
    overflow: hidden;
}

.table thead th {
    background-color: var(--bg-secondary);
    border-bottom: 2px solid var(--bg-tertiary);
    color: var(--text-primary);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
}

.table tbody tr {
    border-bottom: 1px solid var(--bg-tertiary);
    transition: background-color var(--transition-fast);
}

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

.table td {
    color: var(--text-secondary);
    vertical-align: middle;
}

/* Пагинация */
.pagination .page-link {
    background-color: var(--bg-card);
    border: 2px solid var(--bg-tertiary);
    color: var(--text-primary);
    border-radius: 0.5rem;
    margin: 0 0.25rem;
    transition: all var(--transition-base);
}

.pagination .page-link:hover {
    background-color: var(--accent-primary);
    border-color: var(--accent-primary);
    color: white;
    transform: translateY(-2px);
}

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

/* Алерты */
.alert {
    border-radius: 0.75rem;
    border: none;
    box-shadow: var(--shadow-md);
}

.alert-primary {
    background-color: rgba(99, 102, 241, 0.2);
    color: #a5b4fc;
    border: 1px solid rgba(99, 102, 241, 0.3);
}

.alert-success {
    background-color: rgba(16, 185, 129, 0.2);
    color: #6ee7b7;
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.alert-danger {
    background-color: rgba(239, 68, 68, 0.2);
    color: #fca5a5;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.alert-warning {
    background-color: rgba(245, 158, 11, 0.2);
    color: #fcd34d;
    border: 1px solid rgba(245, 158, 11, 0.3);
}

/* Бейджи */
.badge {
    font-weight: 600;
    padding: 0.375rem 0.75rem;
    border-radius: 0.375rem;
}

.badge-primary {
    background: var(--gradient-primary);
    color: white;
}

.badge-secondary {
    background: var(--gradient-secondary);
    color: white;
}

.badge-success {
    background: var(--gradient-success);
    color: white;
}

.badge-danger {
    background: var(--gradient-danger);
    color: white;
}

.badge-warning {
    background: var(--gradient-warning);
    color: white;
}

/* Ссылки */
a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: all var(--transition-base);
}

a:hover {
    color: var(--accent-secondary);
    text-decoration: underline;
}

/* Модальные окна */
.modal-content {
    background-color: var(--bg-card);
    border: 1px solid var(--bg-tertiary);
    border-radius: 1rem;
    box-shadow: var(--shadow-xl);
}

.modal-header {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--bg-tertiary);
}

.modal-title {
    color: var(--text-primary);
    font-weight: 600;
}

.modal-body {
    color: var(--text-primary);
}

.modal-footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--bg-tertiary);
}

.btn-close {
    filter: invert(1) grayscale(100%) brightness(200%);
}

/* Dropdown */
.dropdown-menu {
    background-color: var(--bg-card);
    border: 1px solid var(--bg-tertiary);
    border-radius: 0.5rem;
    box-shadow: var(--shadow-xl);
}

.dropdown-item {
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.dropdown-item:hover {
    background-color: var(--bg-secondary);
    color: var(--accent-primary);
}

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

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

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

.pulse {
    animation: pulse 2s ease-in-out infinite;
}

/* Дополнительные утилиты */
.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.bg-gradient-primary {
    background: var(--gradient-primary);
}

.bg-gradient-secondary {
    background: var(--gradient-secondary);
}

.shadow-glow {
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.3);
}

/* Адаптивность */
@media (max-width: 768px) {
    .card {
        border-radius: 0.75rem;
    }
    
    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }
    
    .navbar-brand {
        font-size: 1.25rem;
    }
}

/* Состояния */
.status-pending {
    color: #fbbf24;
    font-weight: 600;
}

.status-in-progress {
    color: #60a5fa;
    font-weight: 600;
}

.status-completed {
    color: #34d399;
    font-weight: 600;
}

.status-overdue {
    color: #f87171;
    font-weight: 600;
}

/* Priority */
.priority-high {
    color: #f87171;
    font-weight: 600;
}

.priority-medium {
    color: #fbbf24;
    font-weight: 600;
}

.priority-low {
    color: #34d399;
    font-weight: 600;
}

/* Энергия */
.energy-high {
    color: #34d399;
    font-weight: 600;
}

.energy-medium {
    color: #fbbf24;
    font-weight: 600;
}

.energy-low {
    color: #f87171;
    font-weight: 600;
}

/* Футер */
footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--bg-tertiary);
    color: var(--text-secondary);
    padding: 2rem 0;
    margin-top: 3rem;
}

/* Иконки */
.icon-box {
    width: 3rem;
    height: 3rem;
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.icon-box-primary {
    background: var(--gradient-primary);
    color: white;
}

.icon-box-secondary {
    background: var(--gradient-secondary);
    color: white;
}

.icon-box-success {
    background: var(--gradient-success);
    color: white;
}

/* Статистика */
.stat-card {
    background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-secondary) 100%);
    border: 1px solid var(--bg-tertiary);
    border-radius: 1rem;
    padding: 1.5rem;
    transition: all var(--transition-base);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--accent-primary);
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    color: var(--text-secondary);
    font-weight: 500;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
}