.catalog-body {
    background: var(--home-bg);
}

.catalog-hero {
    position: relative;
    overflow: hidden;
    border-bottom: 1px solid var(--home-line);
    background: var(--home-brand-soft);
}

.catalog-hero__inner,
.catalog-list__inner {
    width: min(calc(100% - 64px), var(--home-max-width));
    margin: 0 auto;
}

.catalog-hero__inner {
    position: relative;
    z-index: 1;
    min-height: 350px;
    display: grid;
    grid-template-columns: minmax(0, 1.18fr) minmax(340px, 0.82fr);
    gap: clamp(46px, 6vw, 92px);
    align-items: center;
}

.catalog-hero__copy {
    min-width: 0;
    padding: 74px 0 82px;
}

.catalog-eyebrow {
    display: flex;
    margin: 0 0 24px;
    color: var(--home-brand);
    font-size: 0.74rem;
    font-weight: 760;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    align-items: center;
    gap: 14px;
}

.catalog-eyebrow::before {
    width: 30px;
    height: 1px;
    background: var(--home-accent);
    content: "";
}

.catalog-hero h1 {
    max-width: 820px;
    margin: 0;
    color: var(--home-text);
    font-size: clamp(2.75rem, 5vw, 4.8rem);
    font-weight: 670;
    line-height: 1.02;
    letter-spacing: -0.055em;
}

.catalog-hero__copy > p:last-child {
    max-width: 590px;
    margin: 30px 0 0;
    color: var(--home-muted);
    font-size: 1.02rem;
    line-height: 1.7;
}

.catalog-hero__media {
    position: relative;
    overflow: hidden;
    min-width: 0;
    min-height: 300px;
    align-self: stretch;
}

.catalog-hero__media picture,
.catalog-hero__media img {
    width: 100%;
    height: 100%;
    display: block;
}

.catalog-hero__media img {
    object-fit: cover;
    object-position: 58% center;
}

.catalog-hero__media::after {
    position: absolute;
    inset: 0;
    background: rgba(8, 47, 60, 0.1);
    content: "";
    pointer-events: none;
}

.catalog-list {
    padding: clamp(82px, 9vw, 126px) 0 clamp(94px, 10vw, 142px);
    background: var(--home-bg);
}

.catalog-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(54px, 6vw, 82px) clamp(34px, 5vw, 68px);
}

.catalog-course {
    min-width: 0;
    border-top: 1px solid var(--home-line);
    padding-top: 18px;
}

.catalog-course__visual {
    position: relative;
    overflow: hidden;
    min-height: 286px;
    display: block;
    color: inherit;
    background-color: var(--home-bg);
    background-image:
        linear-gradient(rgba(0, 67, 88, 0.055) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 67, 88, 0.055) 1px, transparent 1px);
    background-size: 38px 38px;
}

.catalog-course__visual::before,
.catalog-course__visual::after {
    position: absolute;
    content: "";
}

.catalog-course__picture,
.catalog-course__picture img {
    width: 100%;
    height: 100%;
    display: block;
}

.catalog-course__picture {
    position: absolute;
    inset: 0;
}

.catalog-course__picture::after {
    position: absolute;
    inset: 0;
    background: rgba(8, 47, 60, 0.08);
    content: "";
    transition: background-color 180ms ease;
}

.catalog-course__picture img {
    object-fit: cover;
}

.catalog-course__visual::before {
    top: 0;
    right: 0;
    width: 31%;
    height: 100%;
    background: rgba(0, 67, 88, 0.13);
    transition: background-color 180ms ease;
}

.catalog-course__visual::after {
    right: 31%;
    bottom: 0;
    width: 18%;
    height: 7px;
    background: rgba(173, 123, 67, 0.72);
}

.catalog-course__number {
    position: absolute;
    top: 20px;
    left: 22px;
    color: var(--home-brand);
    font-size: 0.72rem;
    font-weight: 760;
    letter-spacing: 0.16em;
    z-index: 2;
}

.catalog-course__axis,
.catalog-course__frame,
.catalog-course__frame::before,
.catalog-course__frame::after {
    position: absolute;
    display: block;
    content: "";
}

.catalog-course__axis {
    right: 19%;
    bottom: 22%;
    left: 18%;
    height: 1px;
    background: rgba(0, 67, 88, 0.24);
}

.catalog-course__frame {
    right: 24%;
    bottom: 22%;
    width: 44%;
    height: 48%;
    border-top: 2px solid rgba(0, 67, 88, 0.7);
    border-right: 2px solid rgba(0, 67, 88, 0.7);
    border-left: 2px solid rgba(0, 67, 88, 0.7);
    transition: border-color 180ms ease;
}

.catalog-course__frame::before {
    top: 46%;
    right: 0;
    left: 0;
    height: 1px;
    background: rgba(0, 67, 88, 0.38);
}

.catalog-course__frame::after {
    top: 0;
    bottom: 0;
    left: 50%;
    width: 1px;
    background: rgba(0, 67, 88, 0.28);
}

.catalog-course__node {
    position: absolute;
    right: calc(24% - 4px);
    bottom: calc(22% + 48% - 5px);
    width: 9px;
    height: 9px;
    border: 2px solid var(--home-accent);
    border-radius: 50%;
    background: var(--home-bg);
    transition: background-color 180ms ease, transform 180ms ease;
}

.catalog-course:hover .catalog-course__visual::before,
.catalog-course:focus-within .catalog-course__visual::before {
    background: rgba(0, 67, 88, 0.21);
}

.catalog-course:hover .catalog-course__picture::after,
.catalog-course:focus-within .catalog-course__picture::after {
    background: rgba(8, 47, 60, 0.02);
}

.catalog-course:hover .catalog-course__frame,
.catalog-course:focus-within .catalog-course__frame {
    border-color: var(--home-brand);
}

.catalog-course:hover .catalog-course__node,
.catalog-course:focus-within .catalog-course__node {
    background: var(--home-accent);
    transform: scale(1.08);
}

.catalog-course--variant-2 .catalog-course__axis {
    right: 12%;
    left: 27%;
    transform: rotate(-8deg);
}

.catalog-course--variant-2 .catalog-course__visual::before {
    right: auto;
    left: 0;
    width: 23%;
    background: rgba(8, 47, 60, 0.18);
}

.catalog-course--variant-2 .catalog-course__visual::after {
    right: auto;
    bottom: auto;
    left: 23%;
    width: 8px;
    height: 24%;
}

.catalog-course--variant-2 .catalog-course__frame {
    right: 18%;
    width: 38%;
    height: 55%;
}

.catalog-course--variant-2 .catalog-course__node {
    right: calc(18% - 4px);
    bottom: calc(22% + 55% - 5px);
}

.catalog-course--variant-3 .catalog-course__axis {
    right: 24%;
    left: 13%;
    transform: rotate(7deg);
}

.catalog-course--variant-3 .catalog-course__visual::before {
    top: auto;
    bottom: 0;
    width: 46%;
    height: 31%;
    background: rgba(0, 67, 88, 0.16);
}

.catalog-course--variant-3 .catalog-course__visual::after {
    right: 0;
    bottom: 31%;
    width: 16%;
    height: 8px;
}

.catalog-course--variant-3 .catalog-course__frame {
    right: 30%;
    width: 48%;
    height: 42%;
}

.catalog-course--variant-3 .catalog-course__node {
    right: calc(30% - 4px);
    bottom: calc(22% + 42% - 5px);
}

.catalog-course--variant-4 .catalog-course__visual::before {
    top: 18%;
    right: 12%;
    width: 38%;
    height: 64%;
    background: rgba(0, 67, 88, 0.12);
}

.catalog-course--variant-4 .catalog-course__visual::after {
    right: auto;
    bottom: 18%;
    left: 0;
    width: 26%;
    height: 8px;
}

.catalog-course--variant-4 .catalog-course__axis {
    right: 17%;
    left: 20%;
    transform: rotate(-4deg);
}

.catalog-course--variant-4 .catalog-course__frame {
    right: 14%;
    width: 50%;
    height: 38%;
}

.catalog-course--variant-4 .catalog-course__node {
    right: calc(14% - 4px);
    bottom: calc(22% + 38% - 5px);
}

.catalog-course__body {
    padding-top: 24px;
}

.catalog-course h2 {
    margin: 0;
    font-size: clamp(1.25rem, 1.8vw, 1.55rem);
    font-weight: 650;
    line-height: 1.25;
    letter-spacing: -0.025em;
}

.catalog-course h2 a {
    color: var(--home-text);
    text-decoration: none;
}

.catalog-course__body p {
    margin: 13px 0 0;
    color: var(--home-muted);
    font-size: 0.91rem;
    line-height: 1.62;
}

.catalog-course__link {
    display: inline-flex;
    color: var(--home-brand);
    font-size: 0.86rem;
    font-weight: 680;
    text-decoration: none;
    align-items: center;
    gap: 8px;
}

.catalog-course__actions {
    display: flex;
    margin-top: 18px;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px 26px;
}

.catalog-course__explore {
    display: inline-flex;
    padding: 0;
    border: 0;
    color: var(--home-muted);
    font: inherit;
    font-size: 0.84rem;
    font-weight: 640;
    background: transparent;
    cursor: pointer;
    align-items: center;
    gap: 8px;
}

.catalog-course__explore span {
    color: var(--home-accent);
    font-size: 1rem;
}

.catalog-course__link span {
    color: var(--home-accent);
    transition: transform 160ms ease;
}

.catalog-course h2 a:hover,
.catalog-course h2 a:focus-visible,
.catalog-course__link:hover,
.catalog-course__link:focus-visible {
    color: var(--home-brand-dark);
}

.catalog-course__explore:hover,
.catalog-course__explore:focus-visible {
    color: var(--home-brand-dark);
}

.catalog-course__link:hover span,
.catalog-course__link:focus-visible span {
    transform: translateX(3px);
}

.catalog-course a:focus-visible,
.catalog-course button:focus-visible {
    outline: 2px solid var(--home-brand);
    outline-offset: 4px;
}

.catalog-empty {
    border-top: 1px solid var(--home-line);
    padding: 34px 0;
}

.catalog-empty p {
    margin: 0;
    color: var(--home-muted);
    font-size: 0.96rem;
}

.catalog-explorer {
    padding: clamp(84px, 9vw, 124px) 0 clamp(92px, 10vw, 138px);
    background: var(--home-surface);
}

.catalog-explorer__inner {
    width: min(calc(100% - 64px), var(--home-max-width));
    margin: 0 auto;
}

.catalog-explorer__header {
    display: grid;
    margin-bottom: 52px;
    grid-template-columns: minmax(0, 1.35fr) minmax(300px, 0.65fr);
    gap: clamp(42px, 6vw, 86px);
    align-items: center;
}

.catalog-explorer__header .catalog-eyebrow {
    margin-bottom: 7px;
}

.catalog-explorer__header h2 {
    margin: 0;
    color: var(--home-text);
    font-size: clamp(2.3rem, 4vw, 3.8rem);
    font-weight: 660;
    line-height: 1.05;
    letter-spacing: -0.05em;
}

.catalog-explorer__media {
    position: relative;
    overflow: hidden;
    min-width: 0;
    min-height: 230px;
    aspect-ratio: 2 / 1;
    align-self: center;
}

.catalog-explorer__media picture,
.catalog-explorer__media img {
    width: 100%;
    height: 100%;
    display: block;
}

.catalog-explorer__media img {
    object-fit: cover;
    object-position: center 58%;
}

.catalog-explorer__media::after {
    position: absolute;
    inset: 0;
    background: rgba(0, 67, 88, 0.07);
    content: "";
    pointer-events: none;
}

.catalog-explorer__desktop {
    display: none;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    border: 1px solid var(--home-line);
    min-height: 360px;
}

.catalog-column {
    min-width: 0;
    padding: 25px 22px 28px;
    border-left: 1px solid var(--home-line);
    background: #edf2f1;
}

.catalog-column:first-child {
    border-left: 0;
}

.catalog-column--courses {
    color: #ffffff;
    background: var(--home-brand);
}

.catalog-column--classes {
    background: var(--home-surface);
}

.catalog-column h3 {
    margin: 0 0 22px;
    color: var(--home-muted);
    font-size: 0.66rem;
    font-weight: 760;
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

.catalog-column--courses h3 {
    color: rgba(255, 255, 255, 0.58);
}

.catalog-column__items {
    display: grid;
    gap: 4px;
}

.catalog-column__items button {
    position: relative;
    width: 100%;
    min-height: 44px;
    padding: 10px 28px 10px 10px;
    border: 0;
    color: var(--home-text);
    font: inherit;
    font-size: 0.86rem;
    font-weight: 590;
    line-height: 1.35;
    text-align: left;
    background: transparent;
    cursor: pointer;
}

.catalog-column__terminal {
    position: relative;
    margin: 0;
    padding: 11px 10px 11px 25px;
    color: var(--home-text);
    font-size: 0.86rem;
    font-weight: 560;
    line-height: 1.35;
}

.catalog-column__terminal span {
    position: absolute;
    top: 50%;
    left: 10px;
    color: var(--home-accent);
    font-size: 0.5rem;
    transform: translateY(-50%);
}

.catalog-column--courses button {
    color: rgba(255, 255, 255, 0.78);
}

.catalog-column__items button span {
    position: absolute;
    top: 50%;
    right: 9px;
    color: var(--home-accent);
    font-size: 0.6rem;
    opacity: 0;
    transform: translateY(-50%);
}

.catalog-column__items button:hover,
.catalog-column__items button:focus-visible,
.catalog-column__items button.is-selected {
    color: var(--home-brand-dark);
    background: rgba(255, 255, 255, 0.7);
}

.catalog-column--courses button:hover,
.catalog-column--courses button:focus-visible,
.catalog-column--courses button.is-selected {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.1);
}

.catalog-column__items button.is-selected span {
    opacity: 1;
}

.catalog-column__items button:focus-visible,
.catalog-explorer__tree summary:focus-visible {
    outline: 2px solid var(--home-accent);
    outline-offset: 2px;
}

.catalog-column__empty {
    margin: 10px;
    color: var(--home-muted);
    font-size: 0.82rem;
    line-height: 1.55;
}

.catalog-column__empty--unavailable {
    color: rgba(41, 58, 63, 0.48);
    font-size: 1rem;
}

.catalog-column--courses .catalog-column__empty {
    color: rgba(255, 255, 255, 0.66);
}

.catalog-explorer__tree {
    border-top: 1px solid var(--home-line);
}

.catalog-explorer__tree details {
    border-bottom: 1px solid var(--home-line);
}

.catalog-explorer__tree summary {
    position: relative;
    padding: 17px 42px 17px 0;
    color: var(--home-text);
    font-size: 0.92rem;
    font-weight: 640;
    list-style: none;
    cursor: pointer;
}

.catalog-explorer__tree summary::-webkit-details-marker {
    display: none;
}

.catalog-explorer__tree summary::after {
    position: absolute;
    top: 50%;
    right: 8px;
    color: var(--home-accent);
    content: "+";
    transform: translateY(-50%);
}

.catalog-explorer__tree details[open] > summary::after {
    content: "−";
}

.catalog-tree__course > summary {
    color: var(--home-brand-dark);
    font-size: 1rem;
}

.catalog-tree__branch {
    margin: 0 0 12px 18px;
    border-left: 1px solid rgba(0, 67, 88, 0.18);
    padding-left: 18px;
}

.catalog-explorer__tree p {
    margin: 0 0 18px 18px;
    color: var(--home-muted);
    font-size: 0.84rem;
}

.catalog-tree__classes {
    margin: 0 0 17px 18px;
    padding-left: 20px;
    color: var(--home-muted);
}

.catalog-tree__classes li {
    padding: 5px 0;
    font-size: 0.86rem;
}

.catalog-explorer__action {
    display: flex;
    margin-top: 28px;
    justify-content: flex-end;
}

.catalog-explorer__action a {
    display: inline-flex;
    color: var(--home-brand);
    font-size: 0.88rem;
    font-weight: 680;
    text-decoration: none;
    align-items: center;
    gap: 9px;
}

.catalog-explorer__action span {
    color: var(--home-accent);
    transition: transform 160ms ease;
}

.catalog-explorer__action a:hover,
.catalog-explorer__action a:focus-visible {
    color: var(--home-brand-dark);
}

.catalog-explorer__action a:hover span,
.catalog-explorer__action a:focus-visible span {
    transform: translateX(3px);
}

.catalog-explorer__action a:focus-visible {
    outline: 2px solid var(--home-brand);
    outline-offset: 4px;
}

@media (min-width: 769px) {
    .catalog-js .catalog-explorer__desktop {
        display: grid;
    }

    .catalog-js .catalog-explorer__tree {
        display: none;
    }
}

@media (max-width: 1024px) {
    .catalog-hero__inner {
        min-height: 340px;
        grid-template-columns: minmax(0, 1.1fr) minmax(300px, 0.9fr);
        gap: 42px;
    }

    .catalog-course__visual {
        min-height: 248px;
    }

    .catalog-explorer__desktop {
        min-height: 340px;
    }

    .catalog-explorer__header {
        grid-template-columns: minmax(0, 1.2fr) minmax(260px, 0.8fr);
        gap: 40px;
    }

    .catalog-explorer__media {
        min-height: 210px;
    }

    .catalog-column {
        padding-right: 15px;
        padding-left: 15px;
    }
}

@media (max-width: 768px) {
    .catalog-hero__inner,
    .catalog-list__inner {
        width: min(calc(100% - 40px), var(--home-max-width));
    }

    .catalog-hero__inner {
        min-height: 0;
        grid-template-columns: 1fr;
        gap: 0;
    }

    .catalog-hero__copy {
        padding: 70px 0 76px;
    }

    .catalog-hero__media {
        min-height: clamp(230px, 54vw, 360px);
    }

    .catalog-grid {
        grid-template-columns: 1fr;
        gap: 52px;
    }

    .catalog-course__visual {
        min-height: clamp(210px, 50vw, 320px);
    }

    .catalog-explorer__inner {
        width: min(calc(100% - 40px), var(--home-max-width));
    }

    .catalog-explorer__header {
        margin-bottom: 38px;
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .catalog-explorer__media {
        min-height: clamp(190px, 48vw, 290px);
    }

    .catalog-explorer__action {
        margin-top: 24px;
        justify-content: flex-start;
    }
}

@media (max-width: 480px) {
    .catalog-hero__inner,
    .catalog-list__inner {
        width: calc(100% - 32px);
    }

    .catalog-explorer__inner {
        width: calc(100% - 32px);
    }

    .catalog-hero__copy {
        padding: 58px 0 50px;
    }

    .catalog-hero h1 {
        font-size: clamp(1.95rem, 8vw, 2.5rem);
    }

    .catalog-hero__copy > p:last-child {
        margin-top: 24px;
        font-size: 0.96rem;
    }

    .catalog-list {
        padding: 68px 0 82px;
    }

    .catalog-course__visual {
        min-height: 205px;
    }

    .catalog-explorer {
        padding: 68px 0 78px;
    }

    .catalog-explorer__header h2 {
        font-size: clamp(2rem, 10vw, 2.7rem);
    }

    .catalog-tree__branch {
        margin-left: 10px;
        padding-left: 12px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .catalog-course__visual::before,
    .catalog-course__frame,
    .catalog-course__node,
    .catalog-course__link span {
        transition: none;
    }

    .catalog-explorer__action span {
        transition: none;
    }
}