.project-detail {
    /* Uses the viewport remaining after the shared header and footer to keep the final row visible. */
    display: flex;
    flex-direction: column;
    min-height: calc(100vh - var(--header-height) - var(--header-height));
    padding: 0 var(--space-6) var(--space-8);
}

.project-detail__header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: var(--space-4);
    padding-top: var(--space-8);
}

.project-detail__breadcrumb,
.project-detail__subtitle {
    margin: 0;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

.project-detail__breadcrumb {
    margin-bottom: var(--space-3);
}

.project-detail h1,
.project-detail h2 {
    margin: 0;
    color: var(--color-heading);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
}

.project-detail h1 {
    font-size: var(--font-size-xl);
}

.project-detail h2 {
    font-size: var(--font-size-md);
}

.project-detail__subtitle {
    margin-top: var(--space-1);
}

.project-detail__actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.project-detail__action {
    border: var(--border-width) var(--border-style) var(--button-bg);
    border-radius: var(--radius-none);
    background: var(--button-bg);
    color: var(--button-text);
    padding: var(--space-2) var(--space-3);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    text-decoration: none;
}

.project-detail__action:hover,
.project-detail__action:focus-visible {
    border-color: var(--button-bg-hover);
    background: var(--button-bg-hover);
    color: var(--button-text);
}

.project-detail__action--secondary {
    border-color: var(--color-border-strong);
    background: var(--card-bg);
    color: var(--color-text);
}

.project-detail__action--secondary:hover,
.project-detail__action--secondary:focus-visible {
    border-color: var(--input-focus);
    background: var(--card-bg);
    color: var(--color-link);
}

.project-detail__action--primary-unavailable,
.project-detail__action--disabled {
    cursor: not-allowed;
}

.project-detail__action--disabled {
    border-color: var(--color-border);
    background: var(--color-surface-alt);
    color: var(--color-text-muted);
}

/* A 70/30 content split prioritizes the summary while keeping implementation details scannable. */
.project-detail__overview,
.project-detail__architecture-results {
    display: grid;
    grid-template-columns: minmax(0, 7fr) minmax(0, 3fr);
    gap: var(--space-4);
    margin-top: var(--space-6);
}

.project-detail__panel,
.project-detail__architecture {
    border: var(--border-width) var(--border-style) var(--card-border);
    border-radius: var(--radius-none);
    background: var(--card-bg);
    padding: var(--space-3);
}

.project-detail__panel p {
    margin: var(--space-3) 0 0;
    font-size: var(--font-size-sm);
    line-height: var(--line-height-normal);
}

.project-detail__tech-stack,
.project-detail__results-list {
    display: grid;
    gap: var(--space-2);
    margin: var(--space-3) 0 0;
    padding-left: var(--space-4);
    font-size: var(--font-size-sm);
}

.project-detail__screenshots {
    margin-top: var(--space-6);
}

.project-detail__section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    margin-bottom: var(--space-3);
}

.project-detail__section-header p {
    margin: 0;
    color: var(--color-text-muted);
    font-size: var(--font-size-xs);
}

.project-detail__carousel {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: stretch;
    border: var(--border-width) var(--border-style) var(--card-border);
}

.project-detail__carousel-control {
    border: 0;
    border-radius: var(--radius-none);
    background: var(--color-primary-strong);
    color: var(--button-text);
    cursor: pointer;
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    padding: var(--space-3);
}

.project-detail__carousel-control:hover,
.project-detail__carousel-control:focus-visible {
    background: var(--button-bg-hover);
}

.project-detail__carousel-control:focus-visible {
    outline: var(--border-width) var(--border-style) var(--input-focus);
    outline-offset: calc(var(--border-width) * -1);
}

.project-detail__carousel-viewport {
    min-width: 0;
    overflow: hidden;
}

/* A flex track and percentage translation reuse the existing two-card carousel interaction. */
.project-detail__screenshot-track {
    display: flex;
    transition: transform 200ms ease-in-out;
}

.project-detail__carousel[data-carousel-index="1"] .project-detail__screenshot-track {
    transform: translateX(-50%);
}

.project-detail__screenshot {
    box-sizing: border-box;
    flex: 0 0 50%;
    margin: 0;
    padding: var(--space-3);
}

.project-detail__screenshot img,
.project-detail__screenshot--placeholder > div {
    display: block;
    width: 100%;
    /* A fixed presentation ratio is required to compare mixed screenshot and placeholder content. */
    aspect-ratio: 16 / 9;
    border: var(--border-width) var(--border-style) var(--card-border);
    background: var(--color-surface-alt);
    object-fit: cover;
}

.project-detail__screenshot--placeholder > div {
    display: grid;
    place-items: center;
    color: var(--color-text-muted);
    font-family: var(--font-family-mono);
    font-size: var(--font-size-xs);
    text-transform: uppercase;
}

.project-detail__screenshot figcaption {
    margin-top: var(--space-2);
    color: var(--color-text-muted);
    font-size: var(--font-size-xs);
    text-align: center;
}

.project-detail__architecture-results {
    align-items: stretch;
    flex: 1;
    min-height: var(--space-10);
}

.project-detail__results {
    border-color: var(--color-success);
    border-width: var(--border-width-strong);
}

/* The diagram uses a simple horizontal flow because no reusable diagram geometry tokens exist. */
.project-detail__diagram {
    display: flex;
    align-items: stretch;
    justify-content: space-between;
    gap: var(--space-2);
    margin: var(--space-3) 0 0;
    padding: 0;
    list-style: none;
}

.project-detail__diagram-node {
    display: grid;
    flex: 1 1 0;
    gap: var(--space-1);
    border: var(--border-width) var(--border-style) var(--card-border);
    background: var(--color-surface-alt);
    padding: var(--space-3);
}

.project-detail__diagram-node strong {
    color: var(--color-heading);
    font-size: var(--font-size-sm);
}

.project-detail__diagram-node span {
    color: var(--color-text-muted);
    font-size: var(--font-size-xs);
}

.project-detail__diagram-connector {
    align-self: center;
    color: var(--color-primary);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
}

.project-detail__results-list {
    padding-left: 0;
    list-style: none;
}

.project-detail__results-list li {
    display: flex;
    align-items: flex-start;
    gap: var(--space-2);
}

.project-detail__results-list li::before {
    content: "✓";
    color: var(--color-success);
    font-weight: var(--font-weight-bold);
}

/* Disables the only custom slide duration for visitors who request reduced motion. */
@media (prefers-reduced-motion: reduce) {
    .project-detail__screenshot-track {
        transition: none;
    }
}

@media (max-width: 640px) {
    .project-detail {
        min-height: auto;
    }

    .project-detail__header,
    .project-detail__section-header {
        align-items: flex-start;
        flex-direction: column;
    }

    .project-detail__overview,
    .project-detail__architecture-results {
        grid-template-columns: 1fr;
    }

    .project-detail__architecture-results {
        flex: initial;
    }

    .project-detail__screenshot {
        flex-basis: 100%;
    }

    /* Mobile advances one screenshot across the complete visible viewport. */
    .project-detail__carousel[data-carousel-index="1"] .project-detail__screenshot-track {
        transform: translateX(-100%);
    }

    .project-detail__carousel[data-carousel-index="2"] .project-detail__screenshot-track {
        transform: translateX(-200%);
    }

    .project-detail__diagram {
        align-items: stretch;
        flex-direction: column;
    }

    .project-detail__diagram-connector {
        align-self: center;
        transform: rotate(90deg);
    }
}