:root {
    --catalog-surface: #ffffff;
    --catalog-text: #1e293b;
    --catalog-muted: #64748b;
    --catalog-border: #e2e8f0;
    --catalog-orange: #f28a2e;
    --catalog-blue: #1f4ea3;
    --catalog-blue-dark: #0f2c63;
}

.catalog-container {
    width: min(1200px, calc(100% - 32px));
    margin: 0 auto;
}

.catalog-featured {
    position: relative;
    overflow: hidden;
    padding: 62px 0 66px;
    background:
        radial-gradient(circle at 8% 10%, rgba(31, 78, 163, 0.14) 0, transparent 40%),
        radial-gradient(circle at 92% 16%, rgba(242, 138, 46, 0.15) 0, transparent 44%),
        linear-gradient(180deg, #f8fbff 0%, #ffffff 80%);
}

.catalog-featured::before {
    content: '';
    position: absolute;
    width: clamp(160px, 28vw, 320px);
    height: clamp(160px, 28vw, 320px);
    right: -100px;
    top: -88px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(242, 138, 46, 0.2) 0, rgba(242, 138, 46, 0) 70%);
    pointer-events: none;
}

.catalog-featured-title {
    position: relative;
    overflow: hidden;
    text-align: center;
    margin: 0 auto 32px;
    max-width: min(920px, 100%);
    padding: clamp(20px, 3vw, 34px) clamp(18px, 4vw, 42px);
    border-radius: 24px;
    border: 1px solid rgba(148, 163, 184, 0.28);
    background:
        linear-gradient(128deg, rgba(255, 255, 255, 0.96) 0%, rgba(255, 255, 255, 0.95) 58%, rgba(255, 241, 227, 0.9) 100%);
    box-shadow: 0 22px 46px rgba(15, 23, 42, 0.12);
    -webkit-backdrop-filter: blur(4px);
    backdrop-filter: blur(4px);
}

.catalog-featured-title::after {
    content: '';
    position: absolute;
    inset: auto auto -56px -50px;
    width: 220px;
    height: 220px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(31, 78, 163, 0.18) 0, rgba(31, 78, 163, 0) 70%);
    pointer-events: none;
}

.catalog-featured-kicker {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin: 0;
    color: var(--catalog-blue-dark);
    font-size: 0.76rem;
    font-weight: 800;
    letter-spacing: 0.16em;
}

.catalog-featured-kicker::before,
.catalog-featured-kicker::after {
    content: '';
    width: 28px;
    height: 2px;
    border-radius: 999px;
}

.catalog-featured-kicker::before {
    background: linear-gradient(90deg, rgba(242, 138, 46, 0.2) 0%, rgba(242, 138, 46, 1) 100%);
}

.catalog-featured-kicker::after {
    background: linear-gradient(90deg, rgba(31, 78, 163, 1) 0%, rgba(31, 78, 163, 0.18) 100%);
}

.catalog-featured-title h2 {
    margin: 14px 0 0;
    color: #0f172a;
    font-size: clamp(1.85rem, 2.8vw, 2.7rem);
    line-height: 1.15;
    letter-spacing: -0.02em;
}

.catalog-featured-title p {
    margin: 14px auto 0;
    max-width: 620px;
    color: #55657a;
    font-size: 1rem;
    line-height: 1.7;
}

.catalog-carousel-shell {
    display: grid;
    grid-template-columns: 52px 1fr 52px;
    align-items: center;
    gap: 16px;
}

.catalog-carousel-window {
    overflow: hidden;
    padding: 4px;
}

.catalog-featured-track {
    display: flex;
    gap: 24px;
    transition: transform 0.35s ease;
    will-change: transform;
}

.catalog-featured-track .catalog-course-card {
    flex: 0 0 100%;
}

.catalog-carousel-control {
    width: 52px;
    height: 52px;
    border-radius: 999px;
    border: 1px solid var(--catalog-border);
    background: #ffffff;
    color: var(--catalog-blue-dark);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 12px 24px rgba(15, 23, 42, 0.1);
    transition: all 0.2s ease;
}

.catalog-carousel-control:hover:not(:disabled) {
    background: var(--catalog-blue-dark);
    color: #ffffff;
}

.catalog-carousel-control:disabled {
    opacity: 0.35;
    cursor: not-allowed;
    box-shadow: none;
}

.catalog-course-card {
    background: var(--catalog-surface);
    border-radius: 24px;
    border: 1px solid var(--catalog-border);
    overflow: hidden;
    box-shadow: 0 12px 30px rgba(15, 23, 42, 0.08);
    display: flex;
    flex-direction: column;
    min-height: 100%;
}

.catalog-course-image-wrap {
    aspect-ratio: 16 / 10;
    background: #e2e8f0;
    overflow: hidden;
}

.catalog-course-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.catalog-course-card:hover .catalog-course-image {
    transform: scale(1.04);
}

.catalog-course-body {
    padding: 18px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    flex: 1;
}

.catalog-course-title {
    margin: 0;
    font-size: 1.05rem;
    line-height: 1.35;
    color: #0f172a;
}

.catalog-course-link {
    margin-top: auto;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    border: 2px solid var(--catalog-orange);
    color: var(--catalog-orange);
    border-radius: 999px;
    padding: 9px 14px;
    font-weight: 700;
    font-size: 0.78rem;
    letter-spacing: 0.02em;
    align-self: flex-start;
    transition: all 0.2s ease;
}

.catalog-course-link:hover {
    background: var(--catalog-orange);
    color: #ffffff;
}

.catalog-empty-state {
    grid-column: 1 / -1;
    text-align: center;
    border: 1px dashed var(--catalog-border);
    border-radius: 24px;
    padding: 50px 20px;
    color: var(--catalog-muted);
    background: #ffffff;
}

.catalog-empty-state h3 {
    margin: 0 0 10px;
    color: #0f172a;
}

.catalog-featured-footer {
    text-align: center;
    margin-top: 28px;
}

.catalog-show-all-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    border-radius: 999px;
    text-decoration: none;
    border: 2px solid #0f172a;
    color: #0f172a;
    font-weight: 700;
    letter-spacing: 0.02em;
    transition: all 0.2s ease;
}

.catalog-show-all-btn:hover {
    background: #0f172a;
    color: #ffffff;
}

@media (min-width: 768px) {
    .catalog-featured-track .catalog-course-card {
        flex: 0 0 calc((100% - 24px) / 2);
    }
}

@media (min-width: 1024px) {
    .catalog-featured-track .catalog-course-card {
        flex: 0 0 calc((100% - 48px) / 3);
    }
}

@media (max-width: 767px) {
    .catalog-featured {
        padding: 52px 0 58px;
    }

    .catalog-featured-title {
        margin-bottom: 24px;
        padding: 18px 14px 20px;
        border-radius: 18px;
    }

    .catalog-featured-kicker {
        font-size: 0.69rem;
        letter-spacing: 0.14em;
    }

    .catalog-featured-kicker::before,
    .catalog-featured-kicker::after {
        width: 20px;
    }

    .catalog-featured-title h2 {
        font-size: clamp(1.55rem, 7vw, 2rem);
    }

    .catalog-featured-title p {
        font-size: 0.92rem;
        line-height: 1.6;
    }

    .catalog-carousel-shell {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .catalog-carousel-window {
        overflow: visible;
    }

    .catalog-carousel-control {
        display: none;
    }

    .catalog-featured-track {
        display: flex !important;
        flex-direction: column !important;
        gap: 16px;
        transform: none !important;
        overflow: visible !important;
    }

    .catalog-featured-track .catalog-course-card {
        flex: 1 1 auto;
    }
}