:root {
    color-scheme: light;
    --color-canvas: #f3f5ef;
    --color-surface: #ffffff;
    --color-surface-muted: #e9eee5;
    --color-text: #172018;
    --color-text-muted: #5d685f;
    --color-border: #d5ddd2;
    --color-accent: #2f7d4c;
    --color-accent-strong: #205e37;
    --color-accent-hover: #205e37;
    --color-accent-soft: #dff1e4;
    --color-on-accent: #ffffff;
    --color-field: #fbfcfa;
    --color-hero: #172018;
    --color-hero-accent: #8bd4a1;
    --color-danger: #a52e2e;
    --color-danger-soft: #fbe9e8;
    --color-warning: #8a5a08;
    --color-warning-soft: #fff2d5;
    --color-focus: #165dba;
    --shadow-card: 0 1.25rem 3.5rem rgb(31 50 36 / 10%);
    --radius-small: 0.5rem;
    --radius-medium: 1rem;
    --radius-large: 1.75rem;
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.5rem;
    --space-6: 2rem;
    --space-7: 3rem;
    --space-8: 4.5rem;
    --content-width: 72rem;
    --form-width: 33rem;
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
        "Segoe UI", sans-serif;
    font-synthesis: none;
}

:root[data-theme="dark"] {
    color-scheme: dark;
    --color-canvas: #111713;
    --color-surface: #1b241d;
    --color-surface-muted: #263229;
    --color-text: #edf4ee;
    --color-text-muted: #b3c0b6;
    --color-border: #3a493d;
    --color-accent: #3f8e5a;
    --color-accent-strong: #8bd4a1;
    --color-accent-hover: #327348;
    --color-accent-soft: #274b32;
    --color-on-accent: #ffffff;
    --color-field: #151d17;
    --color-hero: #080c09;
    --color-danger: #ff9b98;
    --color-danger-soft: #4a2727;
    --color-warning: #f3c46b;
    --color-warning-soft: #4b3a1e;
    --color-focus: #7db7ff;
    --shadow-card: 0 1.25rem 3.5rem rgb(0 0 0 / 28%);
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme]) {
        color-scheme: dark;
        --color-canvas: #111713;
        --color-surface: #1b241d;
        --color-surface-muted: #263229;
        --color-text: #edf4ee;
        --color-text-muted: #b3c0b6;
        --color-border: #3a493d;
        --color-accent: #3f8e5a;
        --color-accent-strong: #8bd4a1;
        --color-accent-hover: #327348;
        --color-accent-soft: #274b32;
        --color-on-accent: #ffffff;
        --color-field: #151d17;
        --color-hero: #080c09;
        --color-danger: #ff9b98;
        --color-danger-soft: #4a2727;
        --color-warning: #f3c46b;
        --color-warning-soft: #4b3a1e;
        --color-focus: #7db7ff;
        --shadow-card: 0 1.25rem 3.5rem rgb(0 0 0 / 28%);
    }
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    min-width: 20rem;
    min-height: 100%;
    background: var(--color-canvas);
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    margin: 0;
    color: var(--color-text);
    background:
        radial-gradient(circle at 90% 12%, rgb(81 153 102 / 12%), transparent 24rem),
        var(--color-canvas);
    font-size: 1rem;
    line-height: 1.6;
    display: flex;
    flex-direction: column;
}

button,
input,
select,
textarea {
    font: inherit;
}

a {
    color: var(--color-accent-strong);
    text-decoration-thickness: 0.08em;
    text-underline-offset: 0.18em;
}

a:hover {
    color: var(--color-accent);
}

:focus-visible {
    outline: 0.2rem solid var(--color-focus);
    outline-offset: 0.2rem;
}

.container {
    width: min(100% - 2rem, var(--content-width));
    margin-inline: auto;
}

.skip-link {
    position: fixed;
    z-index: 100;
    top: var(--space-3);
    left: var(--space-3);
    padding: var(--space-3) var(--space-4);
    color: var(--color-canvas);
    background: var(--color-text);
    border-radius: var(--radius-small);
    transform: translateY(-200%);
}

.skip-link:focus {
    transform: translateY(0);
}

.site-header {
    border-bottom: 0.0625rem solid var(--color-border);
}

.site-header__inner {
    min-height: 4.75rem;
    padding-block: var(--space-3);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    flex-wrap: wrap;
}

.brand {
    color: var(--color-text);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    font-weight: 800;
    letter-spacing: -0.025em;
}

.brand:hover {
    color: var(--color-text);
}

.brand__mark {
    width: 2.75rem;
    height: 2.75rem;
    color: var(--color-on-accent);
    background: var(--color-accent);
    border-radius: 50%;
    display: grid;
    place-items: center;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
}

.brand__name {
    display: none;
}

.site-header__actions,
.content-nav,
.site-nav,
.language-switcher {
    display: flex;
    align-items: center;
}

.site-header__actions {
    gap: var(--space-3);
    margin-left: auto;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.content-nav {
    width: 100%;
    padding-top: var(--space-2);
    border-top: 0.0625rem solid var(--color-border);
    gap: var(--space-5);
    order: 3;
}

.content-nav a {
    min-height: 2.75rem;
    color: var(--color-text);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
}

.site-nav {
    gap: var(--space-3);
}

.site-nav > a:not(.button),
.nav-button {
    min-height: 2.75rem;
    padding: var(--space-2);
    color: var(--color-text);
    background: none;
    border: 0;
    text-decoration: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
}

.site-nav form {
    margin: 0;
}

.language-switcher {
    min-height: 2.75rem;
    gap: 0.15rem;
    padding-inline: var(--space-2);
    color: var(--color-text-muted);
    border-left: 0.0625rem solid var(--color-border);
}

.language-switcher form {
    display: flex;
    margin: 0;
}

.language-switcher button {
    min-width: 2.25rem;
    min-height: 2.75rem;
    padding: 0;
    color: var(--color-text-muted);
    background: none;
    border: 0;
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 700;
}

.language-switcher button[aria-current="true"] {
    color: var(--color-accent-strong);
    text-decoration: underline;
    text-decoration-thickness: 0.12rem;
    text-underline-offset: 0.22rem;
}

.theme-switcher select {
    min-height: 2.75rem;
    max-width: 8.5rem;
    padding: var(--space-2) var(--space-3);
    color: var(--color-text);
    background: var(--color-surface);
    border: 0.0625rem solid var(--color-border);
    border-radius: var(--radius-small);
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
    border: 0;
}

.site-main {
    flex: 1;
}

.button {
    min-height: 3rem;
    padding: 0.75rem 1.25rem;
    color: var(--color-on-accent);
    background: var(--color-accent);
    border: 0.125rem solid var(--color-accent);
    border-radius: 999rem;
    box-shadow: 0 0.5rem 1.25rem rgb(47 125 76 / 20%);
    text-decoration: none;
    font-weight: 750;
    line-height: 1.2;
    text-align: center;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.button:hover {
    color: var(--color-on-accent);
    background: var(--color-accent-hover);
    border-color: var(--color-accent-hover);
}

.button--small {
    min-height: 2.75rem;
    padding: 0.55rem 1rem;
    box-shadow: none;
}

.button--secondary {
    color: var(--color-text);
    background: transparent;
    border-color: var(--color-border);
    box-shadow: none;
}

.button--secondary:hover {
    color: var(--color-accent-strong);
    background: var(--color-surface);
    border-color: var(--color-accent);
}

.hero {
    min-height: auto;
    padding-block: var(--space-7);
    display: grid;
    align-items: center;
    gap: var(--space-7);
}

.hero__content {
    max-width: 42rem;
}

.eyebrow {
    margin: 0 0 var(--space-4);
    color: var(--color-accent-strong);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.11em;
    text-transform: uppercase;
}

.hero h1 {
    max-width: 11ch;
    margin: 0;
    font-size: clamp(2.7rem, 11vw, 6.25rem);
    line-height: 0.95;
    letter-spacing: -0.065em;
}

.hero__lead {
    max-width: 39rem;
    margin: var(--space-5) 0 0;
    color: var(--color-text-muted);
    font-size: clamp(1.05rem, 2vw, 1.25rem);
}

.hero__actions {
    margin-top: var(--space-6);
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-3);
}

.hero__visual {
    position: relative;
    min-height: 19rem;
    overflow: hidden;
    background: var(--color-hero);
    border-radius: var(--radius-large);
    box-shadow: var(--shadow-card);
    isolation: isolate;
}

.hero__visual::after {
    position: absolute;
    inset: 0;
    z-index: 1;
    background: linear-gradient(to top, rgb(10 20 13 / 22%), transparent 45%);
    content: "";
    pointer-events: none;
}

.hero__image {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
    object-position: 50% 38%;
}

.motion-card {
    position: absolute;
    z-index: 2;
    inset: auto var(--space-5) var(--space-5);
    color: var(--color-on-accent);
    pointer-events: none;
    text-shadow: 0 0.125rem 0.75rem rgb(0 0 0 / 45%);
}

.motion-card__number {
    color: var(--color-hero-accent);
    font-size: 0.8rem;
    font-weight: 800;
}

.motion-card__line {
    width: 4rem;
    height: 0.125rem;
    margin-block: var(--space-3);
    background: var(--color-hero-accent);
    box-shadow: 0 0.125rem 0.5rem rgb(0 0 0 / 35%);
    display: block;
}

.motion-card p {
    max-width: 11ch;
    margin: 0;
    font-size: clamp(1.6rem, 7vw, 2.5rem);
    font-weight: 750;
    line-height: 1.05;
    letter-spacing: -0.04em;
}

.page-section {
    padding-block: var(--space-7);
}

.auth-layout {
    width: min(100% - 2rem, var(--form-width));
    margin-inline: auto;
}

.panel {
    padding: clamp(1.5rem, 5vw, 2.5rem);
    background: var(--color-surface);
    border: 0.0625rem solid rgb(23 32 24 / 7%);
    border-radius: var(--radius-large);
    box-shadow: var(--shadow-card);
}

.panel__header {
    margin-bottom: var(--space-6);
}

.panel__header h1,
.status-card h1 {
    margin: 0;
    font-size: clamp(2rem, 7vw, 3rem);
    line-height: 1.05;
    letter-spacing: -0.045em;
}

.panel__header p,
.status-card__text {
    margin: var(--space-3) 0 0;
    color: var(--color-text-muted);
}

.auth-form {
    display: grid;
    gap: var(--space-5);
}

.form-field {
    display: grid;
    gap: var(--space-2);
}

.form-field label,
.form-field legend {
    font-weight: 700;
}

.form-field input,
.form-field select,
.form-field textarea {
    width: 100%;
    min-height: 3.25rem;
    padding: 0.7rem 0.9rem;
    color: var(--color-text);
    background: var(--color-field);
    border: 0.1rem solid var(--color-border);
    border-radius: var(--radius-small);
}

.form-field input:hover,
.form-field select:hover,
.form-field textarea:hover {
    border-color: #98a496;
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
    border-color: var(--color-focus);
}

.form-field--error input,
.form-field--error select,
.form-field--error textarea {
    border-color: var(--color-danger);
}

.helptext {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    order: 3;
}

.helptext ul {
    margin: var(--space-2) 0 0;
    padding-left: 1.2rem;
}

.errorlist {
    margin: 0;
    padding: 0;
    color: var(--color-danger);
    list-style: none;
    font-size: 0.9rem;
    font-weight: 650;
}

.form-errors {
    padding: var(--space-4);
    color: var(--color-danger);
    background: var(--color-danger-soft);
    border-left: 0.25rem solid var(--color-danger);
    border-radius: var(--radius-small);
}

.form-errors__title {
    margin: 0 0 var(--space-2);
    font-weight: 800;
}

.form-actions {
    margin-top: var(--space-2);
    display: grid;
    gap: var(--space-3);
}

.form-actions .button {
    width: 100%;
}

.panel__footer {
    margin: var(--space-5) 0 0;
    padding-top: var(--space-5);
    border-top: 0.0625rem solid var(--color-border);
    color: var(--color-text-muted);
    text-align: center;
}

.status-card {
    padding: clamp(1.75rem, 6vw, 3rem);
    background: var(--color-surface);
    border-radius: var(--radius-large);
    box-shadow: var(--shadow-card);
    text-align: center;
}

.status-card__mark {
    width: 4rem;
    height: 4rem;
    margin: 0 auto var(--space-5);
    color: var(--color-accent-strong);
    background: var(--color-accent-soft);
    border-radius: 50%;
    display: grid;
    place-items: center;
    font-size: 1.6rem;
    font-weight: 900;
}

.status-card--warning .status-card__mark {
    color: var(--color-warning);
    background: var(--color-warning-soft);
}

.status-card--danger .status-card__mark {
    color: var(--color-danger);
    background: var(--color-danger-soft);
}

.status-card__actions {
    margin-top: var(--space-6);
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-3);
}

.account-details {
    margin: var(--space-5) 0;
    padding: var(--space-4);
    background: var(--color-surface-muted);
    border-radius: var(--radius-medium);
    overflow-wrap: anywhere;
}

.messages {
    padding-top: var(--space-4);
}

.message {
    padding: var(--space-3) var(--space-4);
    background: var(--color-accent-soft);
    border-radius: var(--radius-small);
}

.site-footer {
    color: var(--color-text-muted);
    border-top: 0.0625rem solid var(--color-border);
    font-size: 0.85rem;
}

.site-footer__inner {
    min-height: 4.75rem;
    padding-block: var(--space-4);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-2) var(--space-5);
}

.content-section {
    padding-block: var(--space-7);
}

.content-section--last {
    padding-bottom: var(--space-8);
}

.section-heading {
    margin-bottom: var(--space-5);
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: var(--space-4);
}

.section-heading .eyebrow {
    margin-bottom: var(--space-2);
}

.section-heading h2,
.page-intro h1 {
    margin: 0;
    font-size: clamp(2rem, 6vw, 3.5rem);
    line-height: 1.05;
    letter-spacing: -0.045em;
}

.section-heading__actions {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.rail-button {
    width: 2.75rem;
    height: 2.75rem;
    padding: 0;
    color: var(--color-text);
    background: var(--color-surface);
    border: 0.0625rem solid var(--color-border);
    border-radius: 50%;
    cursor: pointer;
}

.rail-button[hidden] {
    display: none;
}

.rail-button:disabled {
    opacity: 0.35;
    cursor: default;
}

.material-rail {
    padding-bottom: var(--space-3);
    display: grid;
    grid-auto-flow: column;
    grid-auto-columns: 86%;
    gap: var(--space-4);
    overflow-x: auto;
    overscroll-behavior-inline: contain;
    scroll-snap-type: inline mandatory;
    scrollbar-color: var(--color-accent) var(--color-surface-muted);
    scrollbar-width: thin;
}

.material-card {
    min-width: 0;
    overflow: hidden;
    color: var(--color-text);
    background: var(--color-surface);
    border: 0.0625rem solid var(--color-border);
    border-radius: var(--radius-medium);
    text-decoration: none;
    scroll-snap-align: start;
    display: flex;
    flex-direction: column;
}

.material-card:hover {
    color: var(--color-text);
    border-color: var(--color-accent);
    box-shadow: var(--shadow-card);
}

.material-card__cover {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: var(--color-surface-muted);
    display: grid;
    place-items: center;
}

.material-card__cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.material-card__cover--placeholder > span:first-child {
    color: var(--color-accent-strong);
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: 0.08em;
}

.access-label {
    position: absolute;
    right: var(--space-3);
    bottom: var(--space-3);
    padding: 0.35rem 0.7rem;
    color: var(--color-accent-strong);
    background: var(--color-accent-soft);
    border-radius: 999rem;
    font-size: 0.78rem;
    font-weight: 750;
}

.material-card__body {
    padding: var(--space-5);
    display: flex;
    flex: 1;
    flex-direction: column;
}

.material-card__meta {
    margin-bottom: var(--space-3);
    color: var(--color-text-muted);
    font-size: 0.82rem;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: var(--space-2);
}

.material-card__title {
    overflow: hidden;
    font-size: 1.35rem;
    font-weight: 800;
    line-height: 1.15;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
}

.material-card__description {
    margin-top: var(--space-3);
    overflow: hidden;
    color: var(--color-text-muted);
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 3;
}

.material-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 18rem), 1fr));
    gap: var(--space-5);
}

.page-intro {
    padding: var(--space-8) 0 var(--space-6);
}

.page-intro p:last-child {
    max-width: 42rem;
    margin: var(--space-4) 0 0;
    color: var(--color-text-muted);
    font-size: 1.1rem;
}

.catalog-section {
    padding-bottom: var(--space-8);
}

.catalog-filter {
    margin-bottom: var(--space-6);
    padding: var(--space-4);
    background: var(--color-surface);
    border: 0.0625rem solid var(--color-border);
    border-radius: var(--radius-medium);
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    gap: var(--space-4);
}

.catalog-filter__field {
    min-width: min(100%, 14rem);
    display: grid;
    gap: var(--space-2);
}

.catalog-filter label {
    font-weight: 700;
}

.catalog-filter select {
    min-height: 3rem;
    padding: 0.65rem 0.8rem;
    color: var(--color-text);
    background: var(--color-field);
    border: 0.0625rem solid var(--color-border);
    border-radius: var(--radius-small);
}

.empty-state {
    padding: var(--space-7);
    color: var(--color-text-muted);
    background: var(--color-surface);
    border-radius: var(--radius-medium);
    text-align: center;
}

.empty-state h2 {
    margin: 0;
    color: var(--color-text);
}

.empty-state p {
    margin: var(--space-2) 0 0;
}

.pagination {
    margin-top: var(--space-7);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
}

.pagination__link {
    min-height: 2.75rem;
    padding: var(--space-2) var(--space-4);
    border: 0.0625rem solid var(--color-border);
    border-radius: 999rem;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
}

.pagination__status {
    color: var(--color-text-muted);
}

.material-detail,
.stage-detail {
    padding-bottom: var(--space-8);
}

.material-detail__header {
    padding-block: var(--space-7);
    display: grid;
    align-items: center;
    gap: var(--space-6);
}

.material-detail__intro {
    min-width: 0;
}

.material-detail__header h1,
.stage-detail__header h1 {
    margin: 0;
    font-size: clamp(2.35rem, 8vw, 4.75rem);
    line-height: 1;
    letter-spacing: -0.055em;
}

.material-detail__meta {
    margin-top: var(--space-4);
    color: var(--color-text-muted);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    flex-wrap: wrap;
}

.access-label--inline {
    position: static;
}

.material-detail__description {
    max-width: 44rem;
    margin-block: var(--space-5);
    color: var(--color-text-muted);
    font-size: clamp(1.05rem, 2.5vw, 1.25rem);
}

.material-detail__description > :first-child {
    margin-top: 0;
}

.material-detail__description > :last-child {
    margin-bottom: 0;
}

.material-detail__cover {
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    border-radius: var(--radius-large);
    box-shadow: var(--shadow-card);
}

.reading-column {
    width: min(100% - 2rem, 48rem);
}

.content-blocks {
    padding-block: var(--space-5);
}

.content-block {
    margin-block: var(--space-5);
}

.content-block--heading {
    margin-top: var(--space-7);
    font-size: clamp(1.65rem, 4vw, 2.35rem);
    line-height: 1.15;
    letter-spacing: -0.035em;
}

.content-block--text,
.content-block--list,
.content-block--quote {
    font-size: clamp(1rem, 2vw, 1.12rem);
}

.content-block--text > :first-child,
.content-block--quote > :first-child {
    margin-top: 0;
}

.content-block--text > :last-child,
.content-block--quote > :last-child {
    margin-bottom: 0;
}

.content-block--list {
    padding-left: 1.5rem;
}

.content-block--list li + li {
    margin-top: var(--space-2);
}

.content-block--quote {
    margin-inline: 0;
    padding: var(--space-5);
    background: var(--color-accent-soft);
    border-left: 0.3rem solid var(--color-accent);
    border-radius: 0 var(--radius-medium) var(--radius-medium) 0;
}

.content-block--media img,
.content-block--media video {
    width: 100%;
    height: auto;
    max-height: 80vh;
    background: var(--color-hero);
    border-radius: var(--radius-medium);
    display: block;
    object-fit: contain;
}

.content-block--media figcaption {
    margin-top: var(--space-3);
    color: var(--color-text-muted);
    font-size: 0.92rem;
    display: grid;
    gap: var(--space-1);
}

.access-notice {
    margin-block: var(--space-6);
    padding: var(--space-5);
    background: var(--color-accent-soft);
    border-radius: var(--radius-medium);
}

.access-notice h2,
.access-notice p {
    margin: 0;
}

.access-notice p {
    margin-top: var(--space-2);
    color: var(--color-text-muted);
}

.material-detail__back {
    margin-top: var(--space-7);
}

.course-program {
    padding-block: var(--space-6);
}

.course-program__list {
    margin: 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: var(--space-3);
}

.course-program__item {
    min-width: 0;
    background: var(--color-surface);
    border: 0.0625rem solid var(--color-border);
    border-radius: var(--radius-medium);
}

.course-program__item > a,
.course-program__item > span {
    min-height: 6rem;
    padding: var(--space-4);
    color: var(--color-text);
    text-decoration: none;
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
}

.course-program__item > a:hover {
    color: var(--color-text);
    background: var(--color-accent-soft);
    border-radius: inherit;
}

.course-program__number {
    width: 2.75rem;
    height: 2.75rem;
    flex: 0 0 2.75rem;
    color: var(--color-on-accent);
    background: var(--color-accent);
    border-radius: var(--radius-small);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
}

.course-program__item strong,
.course-program__item strong + span {
    display: block;
}

.course-program__item strong + span {
    margin-top: var(--space-1);
    color: var(--color-text-muted);
}

.stage-detail__top {
    padding-top: var(--space-5);
}

.stage-detail__course-link {
    margin: 0 0 var(--space-4);
}

.stage-switcher {
    padding: var(--space-3);
    background: var(--color-hero);
    border-radius: var(--radius-medium);
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.stage-switcher__track {
    min-width: 0;
    padding: var(--space-1);
    overflow-x: auto;
    scrollbar-width: thin;
    display: flex;
    gap: var(--space-3);
    flex: 1;
    scroll-snap-type: x proximity;
}

.stage-switcher__step,
.stage-switcher__arrow {
    width: 2.75rem;
    height: 2.75rem;
    flex: 0 0 2.75rem;
    color: var(--color-on-accent);
    text-decoration: none;
    border-radius: var(--radius-small);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.stage-switcher__step {
    background: var(--color-accent-strong);
    scroll-snap-align: center;
}

.stage-switcher__step:hover,
.stage-switcher__step[aria-current="step"],
.stage-switcher__step--current {
    color: var(--color-on-accent);
    background: var(--color-accent);
}

.stage-switcher__step[aria-current="step"],
.stage-switcher__step--current {
    box-shadow: inset 0 0 0 0.125rem var(--color-hero-accent);
}

.stage-switcher__arrow {
    font-size: 2rem;
}

.stage-switcher__arrow:hover {
    color: var(--color-hero-accent);
    background: rgb(255 255 255 / 8%);
}

.stage-switcher__arrow--disabled {
    opacity: 0.35;
}

.stage-detail__header {
    padding-block: var(--space-7) var(--space-4);
}

@media (min-width: 34rem) {
    .brand__name {
        display: inline;
    }

    .hero__actions,
    .status-card__actions {
        flex-direction: row;
        align-items: center;
    }
}

@media (min-width: 52rem) {
    .container {
        width: min(100% - 4rem, var(--content-width));
    }

    .hero {
        padding-block: var(--space-8);
        grid-template-columns: minmax(0, 1.25fr) minmax(20rem, 0.75fr);
        gap: var(--space-8);
    }

    .hero__visual {
        min-height: 32rem;
    }

    .page-section {
        padding-block: var(--space-8);
    }

    .material-rail {
        grid-auto-columns: minmax(16rem, 31%);
    }

    .material-detail__header {
        grid-template-columns: minmax(0, 1fr) minmax(20rem, 0.8fr);
        gap: var(--space-7);
    }
}

@media (min-width: 66rem) {
    .site-header__inner {
        flex-wrap: nowrap;
    }

    .content-nav {
        width: auto;
        padding-top: 0;
        border-top: 0;
        order: initial;
    }
}

@media (max-width: 40rem) {
    .site-header__actions {
        width: 100%;
        margin-left: 0;
        justify-content: space-between;
    }

    .site-nav {
        flex: 1;
    }

    .section-heading {
        align-items: flex-start;
    }

    .rail-button {
        display: none;
    }

    .catalog-filter > * {
        width: 100%;
    }

    .pagination {
        flex-wrap: wrap;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
    }
}