/*
 * The Structural Suite section (ADR 0008): its own navigation, the figures, the
 * doors to its pages, the product cards and the layers of the idea.
 *
 * Only the section's pages link this file, after styles.css. Like styles.css it
 * uses the brand's --fps-* tokens and the page-layout values of styles.css only.
 */

/* Section navigation, a band under the site header */

.section-nav {
    border-bottom: 1px solid var(--fps-color-border);
    background: var(--fps-color-surface-sunken);
}

.section-nav__list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--fps-space-xxs) var(--fps-space-l);
    padding-block: var(--fps-space-s);
    list-style: none;
}

.section-nav__list a {
    color: var(--fps-color-text-muted);
    font: var(--fps-text-small);
    font-weight: 500;
    text-decoration: none;
}

.section-nav__list a:hover,
.section-nav__list a[aria-current="page"] {
    color: var(--fps-color-text);
}

.section-nav__list a[aria-current="page"] {
    text-decoration: underline;
    text-decoration-color: var(--fps-color-accent);
    text-decoration-thickness: 2px;
    text-underline-offset: 0.45em;
}

/* The suite in figures */

.figures {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 13rem), 1fr));
    gap: var(--fps-space-l);
    padding: 0;
    list-style: none;
}

.figure {
    display: grid;
    align-content: start;
    gap: var(--fps-space-xs);
    padding-top: var(--fps-space-m);
    border-top: 2px solid var(--fps-color-accent);
}

.figure__value {
    font: var(--fps-text-display);
    letter-spacing: var(--fps-text-display-tracking);
    white-space: nowrap;
}

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

/* Doors to the section's pages, who the suite is for, and how it is built */

.doors,
.audiences {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 18rem), 1fr));
    gap: var(--fps-space-l);
    padding: 0;
    list-style: none;
}

.door,
.audience {
    display: grid;
    grid-template-rows: auto 1fr auto;
    gap: var(--fps-space-s);
    padding: var(--fps-space-xl);
    border: 1px solid var(--fps-color-border);
    border-radius: var(--fps-radius-large);
    background: var(--fps-color-surface);
}

.audience {
    grid-template-rows: auto 1fr;
}

.door__title,
.audience__title {
    font: var(--fps-text-h3);
    letter-spacing: var(--fps-text-h3-tracking);
}

.door__link {
    font-weight: 600;
}

/* Products in development */

.suite-products {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 20rem), 1fr));
    gap: var(--fps-space-l);
    padding: 0;
    list-style: none;
}

.suite-product {
    display: grid;
    grid-template-rows: auto auto auto 1fr auto auto;
    gap: var(--fps-space-s);
    padding: var(--fps-space-xl);
    border: 1px solid var(--fps-color-border);
    border-radius: var(--fps-radius-large);
    background: var(--fps-color-surface);
}

.suite-product__name {
    font: var(--fps-text-h3);
    letter-spacing: var(--fps-text-h3-tracking);
}

.suite-product__command {
    color: var(--fps-color-text-muted);
}

.suite-product__interfaces {
    color: var(--fps-color-text-muted);
    font: var(--fps-text-small);
}

.suite-product__next {
    padding: var(--fps-space-s) var(--fps-space-m);
    border-radius: var(--fps-radius-medium);
    background: var(--fps-color-surface-sunken);
    font: var(--fps-text-small);
}

.suite-product__label {
    display: block;
    margin-bottom: var(--fps-space-xxs);
    color: var(--fps-color-accent);
    font: var(--fps-text-label);
    letter-spacing: var(--fps-text-label-tracking);
    text-transform: uppercase;
}

.suite-product__link {
    font-weight: 600;
}

/* Releases, in order, each with its features grouped by area */

.releases {
    display: grid;
    gap: var(--fps-space-xl);
    padding: 0;
    list-style: none;
}

.release {
    display: grid;
    gap: var(--fps-space-m);
    padding: var(--fps-space-xl);
    border: 1px solid var(--fps-color-border);
    border-top: 4px solid var(--fps-color-border-strong);
    border-radius: var(--fps-radius-large);
    background: var(--fps-color-surface);
}

.release--in-progress,
.release--done {
    border-top-color: var(--fps-color-accent);
}

.release__heading {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: var(--fps-space-xs) var(--fps-space-s);
}

.release__name {
    font: var(--fps-text-h3);
    letter-spacing: var(--fps-text-h3-tracking);
}

.release__summary {
    max-width: 48rem;
    color: var(--fps-color-text-muted);
}

.release__groups {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 19rem), 1fr));
    gap: var(--fps-space-l) var(--fps-space-xl);
}

.release__group {
    display: grid;
    align-content: start;
    gap: var(--fps-space-xs);
}

.release__group-name {
    color: var(--fps-color-accent);
    font: var(--fps-text-label);
    letter-spacing: var(--fps-text-label-tracking);
    text-transform: uppercase;
}

.release__programs {
    color: var(--fps-color-text-muted);
    font: var(--fps-text-small);
}

.release__items {
    display: grid;
    gap: var(--fps-space-xs);
    padding-left: var(--fps-space-m);
    font: var(--fps-text-small);
}

/* The layers of the idea, top to bottom, each resting on the next */

.layers {
    display: grid;
    gap: var(--fps-space-l);
    max-width: 52rem;
    padding: 0;
    list-style: none;
}

.layer {
    position: relative;
    display: grid;
    gap: var(--fps-space-s);
    padding: var(--fps-space-l) var(--fps-space-xl);
    border: 1px solid var(--fps-color-border);
    border-left: 4px solid var(--fps-color-accent);
    border-radius: var(--fps-radius-medium);
    background: var(--fps-color-surface);
}

/* A short connector from each layer down to the one it uses. */
.layer:not(:last-child)::after {
    content: "";
    position: absolute;
    bottom: calc(-1 * var(--fps-space-l));
    left: var(--fps-space-xxl);
    height: var(--fps-space-l);
    border-left: 2px dashed var(--fps-color-border-strong);
}

.layer__title {
    font: var(--fps-text-title);
    letter-spacing: var(--fps-text-title-tracking);
}

.layer__items {
    display: flex;
    flex-wrap: wrap;
    gap: var(--fps-space-xs);
    padding: 0;
    list-style: none;
}

.layer__items li {
    padding: var(--fps-space-xxs) var(--fps-space-s);
    border-radius: var(--fps-radius-full);
    background: var(--fps-color-accent-subtle);
    color: var(--fps-color-text);
    font: var(--fps-text-small);
}

@media (max-width: 52rem) {
    .figure__value {
        font: var(--fps-text-h1);
        letter-spacing: var(--fps-text-h1-tracking);
    }
}