/* ========================================
   技術テーマ一覧
======================================== */
.themes-section {
    padding: 80px 0;
}

.themes-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.theme-card {
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 32px;
    transition: all 0.3s ease;
}

.theme-card:hover {
    box-shadow: 0 12px 40px rgba(10, 18, 60, 0.1);
    border-color: var(--primary-light);
}

.theme-card-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
}

.theme-card-icon {
    width: 40px;
    height: 40px;
    flex-shrink: 0;
    color: var(--primary-color);
}

.theme-card-icon svg {
    width: 100%;
    height: 100%;
}

.theme-card-category {
    font-family: 'Montserrat', sans-serif;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--accent-gray);
    margin-bottom: 2px;
}

.theme-card-title {
    font-size: 20px;
    font-weight: 900;
    color: var(--primary-color);
}

.theme-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.theme-tag {
    display: inline-block;
    background: var(--light-gray);
    color: var(--primary-color);
    font-size: 13px;
    font-weight: 500;
    padding: 6px 14px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    transition: all 0.2s;
}

.theme-tag:hover {
    background: var(--primary-color);
    color: #fff;
    border-color: var(--primary-color);
}

/* ========================================
   レスポンシブ
======================================== */
@media (max-width: 991px) {
    .themes-grid {
        grid-template-columns: 1fr;
    }
}