/* ===========================================================
   CAPABILITY CATALOG
   =========================================================== */

/* ---------- PAGE HEAD ---------- */

.catalog-head {
    position: relative;
    overflow: hidden;
    padding-block: clamp(48px, 6vw, 80px) clamp(40px, 5vw, 64px);
}

.catalog-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--line-light);
    color: rgba(242, 237, 226, 0.42);
}

.catalog-title-row {
    display: grid;
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    gap: var(--gutter);
    align-items: end;
    padding-block: clamp(36px, 5vw, 56px);
    position: relative;
    z-index: 1;
}

.catalog-title-row .kicker {
    display: flex;
    margin-bottom: 22px;
}

.catalog-head h1 {
    font-size: clamp(3.8rem, 8.4vw, 7.4rem);
    color: var(--bone);
    line-height: 0.9;
}

.catalog-lead {
    max-width: 31ch;
    color: rgba(242, 237, 226, 0.62);
    font-size: clamp(0.95rem, 1.1vw, 1.05rem);
    line-height: 1.9;
    padding-bottom: 6px;
}

.catalog-facts {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    border-top: 1px solid var(--line-light);
    position: relative;
    z-index: 1;
}

.catalog-fact {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 18px 20px;
    border-right: 1px solid var(--line-light);
}

.catalog-fact:first-child {
    padding-left: 0;
}

.catalog-fact:last-child {
    border-right: 0;
}

.fact-value {
    font-family: var(--font-latin);
    font-size: 1.7rem;
    font-weight: 500;
    line-height: 1;
    letter-spacing: -0.02em;
    color: var(--bone);
}

.fact-label {
    font-size: 0.68rem;
    color: rgba(242, 237, 226, 0.42);
}

/* ---------- STICKY CHAPTER NAV ---------- */

.chapter-nav {
    position: sticky;
    top: var(--nav-h);
    z-index: 600;
    background: rgba(242, 237, 226, 0.96);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(12px);
}

.chapter-nav-inner {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
}

.chapter-nav a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 14px 16px;
    border-right: 1px solid var(--line);
    font-size: 0.78rem;
    color: var(--muted);
    transition: background var(--fast), color var(--fast);
}

.chapter-nav a:first-child {
    padding-left: 0;
}

.chapter-nav a:last-child {
    border-right: 0;
}

.chapter-nav a .code {
    font-size: 0.6rem;
    color: var(--signal);
}

.chapter-nav a:hover {
    background: var(--hull);
    color: var(--bone);
}

/* ---------- CHAPTERS ---------- */

.chapter {
    padding-block: clamp(56px, 8vw, 104px);
    border-bottom: 1px solid var(--line);
    scroll-margin-top: 20px;
}

.chapter-grid {
    display: grid;
    grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
    gap: var(--gutter);
    align-items: start;
}

.chapter-rail {
    position: sticky;
    top: calc(var(--nav-h) + 68px);
    align-self: start;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.chapter-num {
    font-family: var(--font-latin);
    font-size: clamp(3.4rem, 6vw, 5.4rem);
    font-weight: 800;
    line-height: 0.9;
    letter-spacing: -0.06em;
    color: transparent;
    -webkit-text-stroke: 1px var(--line-strong);
}

@supports not (-webkit-text-stroke: 1px black) {
    .chapter-num {
        color: var(--line-strong);
    }
}

.chapter-count {
    margin-top: 14px;
    font-size: 0.66rem;
    color: var(--signal-deep);
}

.chapter-rail h2 {
    margin-top: 10px;
    font-size: clamp(1.9rem, 3vw, 2.7rem);
}

.chapter-rail p {
    margin-top: 14px;
    max-width: 23ch;
    font-size: 0.86rem;
    line-height: 1.85;
}

/* ---------- MODULE ROWS ---------- */

.module-list {
    border-top: 1px solid var(--line-strong);
}

.module {
    display: grid;
    grid-template-columns: minmax(0, 4.5fr) minmax(0, 7.5fr);
    gap: clamp(22px, 4vw, 56px);
    padding-block: 26px;
    border-bottom: 1px solid var(--line);
    transition: background var(--fast);
}

.module:hover {
    background: rgba(228, 220, 202, 0.32);
}

.module-head {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 10px 12px;
}

.module-code {
    flex-basis: 100%;
    font-size: 0.62rem;
    color: var(--muted);
}

.module h3 {
    font-size: 1.34rem;
    font-weight: 500;
    transition: color var(--fast);
}

.module:hover h3 {
    color: var(--signal-deep);
}

.status {
    display: inline-block;
    padding: 2px 6px;
    border: 1px solid var(--line-strong);
    font-family: var(--font-latin);
    font-size: 0.56rem;
    letter-spacing: 0.04em;
    color: var(--muted);
    line-height: 1.4;
    white-space: nowrap;
}

.status-beta {
    border-color: var(--signal);
    color: var(--signal-deep);
}

.module-body > p {
    font-size: 0.88rem;
    line-height: 1.85;
    max-width: 50ch;
}

.module-specs {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px 18px;
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px solid var(--line);
}

.spec dt {
    font-size: 0.61rem;
    color: var(--muted);
    line-height: 1.4;
}

.spec dd {
    margin-top: 3px;
    font-family: var(--font-latin);
    font-size: 0.85rem;
    font-weight: 600;
    line-height: 1.4;
    color: var(--hull);
}

/* ---------- METRICS ---------- */

.metrics {
    padding-block: clamp(64px, 8vw, 104px);
}

.metrics-head {
    display: grid;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: var(--gutter);
    align-items: end;
    border-top: 1px solid var(--line-light);
    padding-top: 16px;
    margin-bottom: clamp(32px, 4vw, 48px);
}

.metrics-head .kicker {
    grid-column: 1 / 3;
    padding-bottom: 6px;
}

.metrics-head h2 {
    grid-column: 3 / 9;
    font-size: clamp(2.2rem, 4.4vw, 4rem);
}

.metrics-head .block-note {
    grid-column: 9 / 13;
    justify-self: end;
    text-align: right;
    font-size: 0.78rem;
    color: rgba(242, 237, 226, 0.48);
}

.metric-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    border-top: 1px solid var(--line-light);
}

.metric {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 24px 20px;
    border-right: 1px solid var(--line-light);
}

.metric:first-child {
    padding-left: 0;
}

.metric:last-child {
    border-right: 0;
}

.metric-value {
    font-family: var(--font-latin);
    font-size: clamp(2.6rem, 5vw, 4.6rem);
    font-weight: 500;
    line-height: 0.9;
    letter-spacing: -0.04em;
    color: var(--bone);
}

.metric-suffix {
    color: var(--signal);
    font-size: 0.6em;
}

.metric-label {
    font-size: 0.72rem;
    line-height: 1.6;
    color: rgba(242, 237, 226, 0.46);
}

/* ---------- RESPONSIVE ---------- */

@media (max-width: 1000px) {
    .catalog-title-row {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .catalog-lead {
        max-width: 42ch;
    }

    .chapter-grid {
        grid-template-columns: minmax(0, 3fr) minmax(0, 8fr);
    }

    .module {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .module-specs {
        max-width: 520px;
    }
}

@media (max-width: 820px) {
    .chapter-nav-inner {
        display: flex;
        overflow-x: auto;
        scrollbar-width: none;
    }

    .chapter-nav-inner::-webkit-scrollbar {
        display: none;
    }

    .chapter-nav a {
        flex: 0 0 auto;
        gap: 12px;
        padding: 13px 18px;
        border-right: 1px solid var(--line);
        white-space: nowrap;
    }

    .chapter-nav a:first-child {
        padding-left: 18px;
    }

    .chapter-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .chapter-rail {
        position: static;
        display: grid;
        grid-template-columns: auto 1fr;
        gap: 0 18px;
        align-items: end;
    }

    .chapter-num {
        grid-row: 1 / 4;
        font-size: 4.4rem;
    }

    .chapter-count {
        margin-top: 0;
    }

    .chapter-rail h2 {
        margin-top: 4px;
    }

    .chapter-rail p {
        margin-top: 8px;
        max-width: 44ch;
        grid-column: 2;
    }

    .metrics-head {
        display: block;
    }

    .metrics-head h2 {
        margin: 14px 0;
    }

    .metrics-head .block-note {
        text-align: left;
    }

    .metric-grid {
        grid-template-columns: 1fr 1fr;
    }

    .metric:nth-child(2) {
        border-right: 0;
    }

    .metric:nth-child(3),
    .metric:nth-child(4) {
        border-top: 1px solid var(--line-light);
    }

    .metric:nth-child(3) {
        padding-left: 0;
    }
}

@media (max-width: 560px) {
    .catalog-head {
        padding-top: 36px;
    }

    .catalog-facts {
        grid-template-columns: 1fr 1fr;
    }

    .catalog-fact:nth-child(2) {
        border-right: 0;
    }

    .catalog-fact:nth-child(3),
    .catalog-fact:nth-child(4) {
        border-top: 1px solid var(--line-light);
    }

    .catalog-fact:nth-child(3) {
        padding-left: 0;
    }

    .module-specs {
        grid-template-columns: 1fr 1fr;
    }

    .metric-grid {
        grid-template-columns: 1fr;
    }

    .metric {
        border-right: 0;
        border-top: 1px solid var(--line-light);
        padding-left: 0;
    }

    .metric:first-child {
        border-top: 0;
    }
}