/* ===== СТРАНИЦА АНГЛИЙСКОГО ===== */
.english-page {
    min-height: 100vh;
    background: #eef2f7;
}

.page-header {
    background: #ffffff;
    padding: 30px 0;
    margin: 20px 20px;
    border-radius: 24px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    text-align: center;
    position: relative;
}

/* ===== ПРЕМИАЛЬНАЯ КНОПКА НАЗАД ===== */
.back-btn {
    position: absolute;
    left: 30px;
    top: 50%;
    transform: translateY(-50%);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: #e94560;
    text-decoration: none;
    font-weight: 600;
    font-size: 15px;
    padding: 12px 24px 12px 20px;
    border-radius: 12px;
    background: transparent;
    border: 2px solid #e94560;
    z-index: 1;
    overflow: hidden;
    transition: all 0.3s ease;
}

.back-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0%;
    height: 100%;
    background: #e94560;
    transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: -1;
}

.back-btn:hover::before {
    width: 100%;
}

.back-btn:hover {
    color: #fff;
    border-color: #e94560;
    transform: translateY(-50%) translateX(-4px);
    box-shadow: 0 8px 25px rgba(233, 69, 96, 0.3);
}

.back-btn:active {
    transform: translateY(-50%) scale(0.95);
}

.page-header h1 {
    font-size: 36px;
    font-weight: 800;
    color: #1a1a2e;
    margin: 0;
}

.page-subtitle {
    font-size: 16px;
    color: #636e72;
    margin-top: 8px;
    font-weight: 500;
}

/* ===== ФИЛЬТРЫ ===== */
.filter-bar {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin: 30px 20px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 22px;
    border-radius: 30px;
    border: 2px solid #1a1a2e;
    background: #fff;
    font-family: inherit;
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    transition: all 0.3s ease;
    color: #1a1a2e;
}

.filter-btn:hover,
.filter-btn.active {
    background: #e94560;
    border-color: #e94560;
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(233, 69, 96, 0.3);
}

/* ===== СЕТКА МАТЕРИАЛОВ ===== */
.materials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
    padding: 0 20px 40px;
    max-width: 1200px;
    margin: 0 auto;
}

.material-card {
    background: #fff;
    border-radius: 20px;
    padding: 30px 25px 25px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    border: 1px solid rgba(0, 0, 0, 0.04);
}

.material-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.15);
}

.material-icon {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    transition: transform 0.3s ease;
}

.material-card:hover .material-icon {
    transform: scale(1.1);
}

.material-icon svg {
    width: 32px;
    height: 32px;
    fill: #fff;
}

[data-category="presentations"] .material-icon {
    background: linear-gradient(135deg, #e94560, #ff6b81);
    box-shadow: 0 6px 20px rgba(233, 69, 96, 0.25);
}

[data-category="worksheets"] .material-icon {
    background: linear-gradient(135deg, #3498db, #5dade2);
    box-shadow: 0 6px 20px rgba(52, 152, 219, 0.25);
}

[data-category="tests"] .material-icon {
    background: linear-gradient(135deg, #f39c12, #f7dc6f);
    box-shadow: 0 6px 20px rgba(243, 156, 18, 0.25);
}

[data-category="grammar"] .material-icon {
    background: linear-gradient(135deg, #2ecc71, #58d68d);
    box-shadow: 0 6px 20px rgba(46, 204, 113, 0.25);
}

[data-category="vocabulary"] .material-icon {
    background: linear-gradient(135deg, #9b59b6, #af7ac5);
    box-shadow: 0 6px 20px rgba(155, 89, 182, 0.25);
}

.material-info {
    width: 100%;
}

.material-tag {
    display: inline-block;
    padding: 5px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    margin-bottom: 12px;
}

.material-tag.presentations {
    background: rgba(233, 69, 96, 0.1);
    color: #e94560;
}

.material-tag.worksheets {
    background: rgba(52, 152, 219, 0.1);
    color: #3498db;
}

.material-tag.tests {
    background: rgba(243, 156, 18, 0.1);
    color: #f39c12;
}

.material-tag.grammar {
    background: rgba(46, 204, 113, 0.1);
    color: #2ecc71;
}

.material-tag.vocabulary {
    background: rgba(155, 89, 182, 0.1);
    color: #9b59b6;
}

.material-info h3 {
    font-size: 19px;
    font-weight: 700;
    color: #1a1a2e;
    margin-bottom: 8px;
}

.material-info p {
    font-size: 14px;
    color: #636e72;
    line-height: 1.5;
    margin-bottom: 15px;
}

.material-meta {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 18px;
}

.material-size,
.material-date {
    font-size: 13px;
    color: #999;
    font-weight: 500;
}

.material-download {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    font-size: 15px;
    transition: all 0.3s ease;
    background: #e94560;
    color: #fff;
    box-shadow: 0 4px 14px rgba(233, 69, 96, 0.35);
}

.material-download:hover {
    background: #c0392b;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(233, 69, 96, 0.45);
}

.material-download svg {
    width: 18px;
    height: 18px;
    fill: #fff;
}

/* ===== АДАПТИВ ===== */
@media (max-width: 992px) {
    .materials-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .page-header {
        padding: 25px 20px;
    }
    .back-btn {
        position: static;
        transform: none;
        margin-bottom: 15px;
        justify-content: center;
        width: fit-content;
        margin-left: auto;
        margin-right: auto;
    }
    .back-btn:hover {
        transform: translateX(-4px) !important;
    }
    .back-btn:active {
        transform: scale(0.95) !important;
    }
}

@media (max-width: 600px) {
    .materials-grid {
        grid-template-columns: 1fr;
    }
    .page-header h1 {
        font-size: 28px;
    }
    .material-card {
        padding: 25px 20px 20px;
    }
    .filter-btn {
        padding: 8px 16px;
        font-size: 13px;
    }
}