:root {
    --bg-main: #060B16;
    --accent: #2563EB;
    --text-main: #CBD5E1;
    --text-head: #FFFFFF;
    --card-bg: rgba(255, 255, 255, 0.03);
    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    margin: 0;
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: 'Montserrat', sans-serif;
}

/* Анимация появления контента */
@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.main-layout { display: flex; min-height: 100vh; }

.sidebar {
    width: 300px;
    background: rgba(4, 7, 14, 0.98);
    border-right: 1px solid rgba(37, 99, 235, 0.15);
    padding: 40px 25px;
    position: sticky;
    top: 0; height: 100vh;
    box-sizing: border-box;
}

.filter-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 14px 18px;
    margin-bottom: 8px;
    border-radius: 10px;
    cursor: pointer;
    color: #94a3b8;
    font-weight: 600;
    transition: var(--transition);
}

.filter-item span { font-size: 1.2rem; }

.filter-item:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-head);
    transform: translateX(5px);
}

.filter-item.active {
    background: rgba(37, 99, 235, 0.15);
    color: var(--accent);
    box-shadow: inset 4px 0 0 var(--accent);
}

.content { flex: 1; padding: 60px; animation: slideUp 0.8s ease; }

.container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 30px;
}

/* Карточка с анимацией */
.redux-card {
    background: var(--card-bg);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    transition: var(--transition);
    opacity: 0; /* Для JS анимации */
    animation: slideUp 0.5s ease forwards;
}

.redux-card:hover {
    border-color: var(--accent);
    background: rgba(37, 99, 235, 0.03);
    transform: translateY(-8px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.redux-img {
    width: 100%; height: 190px;
    object-fit: cover; border-radius: 12px;
    margin-bottom: 20px;
    transition: transform 0.5s ease;
}

.redux-card:hover .redux-img { transform: scale(1.03); }

.download-btn {
    display: block;
    text-align: center;
    padding: 15px;
    background: var(--accent);
    color: #FFFFFF;
    text-decoration: none;
    font-weight: 800;
    border-radius: 12px;
    margin-top: auto; /* Всегда внизу */
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.download-btn:hover {
    filter: brightness(1.2);
    box-shadow: 0 0 20px rgba(37, 99, 235, 0.4);
    transform: scale(1.02);
}

/* Фирменная кнопка Назад */
.back-btn {
    display: flex; align-items: center; gap: 10px;
    text-decoration: none; color: var(--text-head);
    font-weight: 700; padding: 12px 20px;
    border: 1px solid rgba(255,255,255,0.1); border-radius: 10px;
    margin-bottom: 40px; transition: var(--transition);
}

.back-btn:hover { background: var(--accent); border-color: var(--accent); box-shadow: 0 0 15px var(--accent); }