/* ============================================================
   AutonoIQ v2 — portfolio.css
   Page-specific layout for the editorial case-study page.
   Tokens + components live in core.css. No colors hardcoded.
   ============================================================ */

/* ----- Hero ----- */
.work-hero {
    padding-top: calc(76px + clamp(4rem, 9vw, 7rem));
    padding-bottom: clamp(3rem, 6vw, 5rem);
}
.work-hero__title {
    font-size: var(--text-display);
    max-width: 14ch;
    margin-top: 1.5rem;
}
.work-hero__sub {
    color: var(--muted);
    max-width: 56ch;
    margin-top: 1.75rem;
}
.work-hero__stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: clamp(1.5rem, 3vw, 2.5rem);
    margin-top: clamp(2.5rem, 5vw, 4rem);
    padding-top: 2rem;
    border-top: 1px solid var(--ink-border);
}

/* Case index (anchor nav) */
.case-index {
    margin-top: clamp(2.5rem, 5vw, 4rem);
}
.case-index__row {
    display: grid;
    grid-template-columns: 4.5rem 1fr auto;
    align-items: baseline;
    gap: 1.25rem;
    padding: 0.85rem 0;
    border-top: 1px solid var(--ink-border);
    text-decoration: none;
    transition: background-color 0.25s var(--ease-out), padding-left 0.3s var(--ease-out);
}
.case-index__row:last-child { border-bottom: 1px solid var(--ink-border); }
.case-index__row:hover { background: var(--ember-soft); padding-left: 0.6rem; }
.case-index__num {
    font-family: var(--font-mono);
    font-size: var(--text-label);
    color: var(--ember);
}
.case-index__name {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 460;
    letter-spacing: -0.01em;
}
.case-index__client {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--muted);
    text-align: right;
}

/* ----- Case spreads ----- */
.case-section { scroll-margin-top: 90px; }
.case__head { max-width: 64rem; }
.case__title {
    font-size: var(--text-h1);
    margin-top: 1.25rem;
    max-width: 16ch;
}
.case__layout {
    display: grid;
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    gap: clamp(2rem, 5vw, 4.5rem);
    align-items: start;
    margin-top: clamp(2.25rem, 5vw, 3.5rem);
}
.case-section--flip .case__layout { grid-template-columns: minmax(0, 6fr) minmax(0, 5fr); }
.case-section--flip .case__body { order: 2; }
.case-section--flip .case__visual { order: 1; }

.case__narrative { color: var(--muted); max-width: 58ch; }
.section--dark .case__narrative { color: var(--muted-dark); }

/* Spec sheet — hairline rows, mono keys */
.spec { margin-top: 2rem; }
.spec__row {
    display: grid;
    grid-template-columns: minmax(9rem, 2fr) 3fr;
    gap: 1rem;
    padding: 0.8rem 0;
    border-top: 1px solid var(--ink-border);
}
.spec__row:last-child { border-bottom: 1px solid var(--ink-border); }
.section--dark .spec__row,
.section--dark .spec__row:last-child { border-color: var(--cream-border); }
.spec__row dt {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--ember);
    padding-top: 0.2rem;
}
.section--dark .spec__row dt { color: var(--ember-bright); }
.spec__row dd { font-size: var(--text-small); }

/* Outcome pull-quote */
.case__quote {
    font-family: var(--font-display);
    font-style: italic;
    font-weight: 380;
    font-size: clamp(1.3rem, 2.2vw, 1.6rem);
    line-height: 1.35;
    letter-spacing: -0.015em;
    border-left: 2px solid var(--ember);
    padding-left: 1.5rem;
    margin-top: 2.25rem;
    max-width: 30ch;
}
.section--dark .case__quote { border-color: var(--ember-bright); }

/* Tags */
.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 2rem;
}
.tags li {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--muted);
    border: 1px solid var(--ink-border);
    border-radius: var(--radius);
    padding: 0.35rem 0.7rem;
}
.section--dark .tags li { color: var(--muted-dark); border-color: var(--cream-border); }

/* ----- Browser-chrome frame for live mockups ----- */
.browser {
    border: 1px solid var(--ink-border-strong);
    border-radius: var(--radius);
    background: var(--paper-deep);
    overflow: hidden;
}
.section--dark .browser { border-color: var(--cream-border); background: var(--ink-soft); }
.browser__bar {
    display: flex;
    align-items: center;
    gap: 0.9rem;
    padding: 0.6rem 0.9rem;
    border-bottom: 1px solid var(--ink-border);
}
.section--dark .browser__bar { border-color: var(--cream-border); }
.browser__dots { display: flex; gap: 0.4rem; flex-shrink: 0; }
.browser__dots span {
    width: 9px; height: 9px; border-radius: 50%;
    border: 1px solid var(--ink-border-strong);
}
.browser__dots span:first-child { background: var(--ember); border-color: var(--ember); }
.browser__url {
    flex: 1;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.06em;
    color: var(--muted);
    background: var(--paper);
    border: 1px solid var(--ink-border);
    border-radius: var(--radius);
    padding: 0.3rem 0.75rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.section--dark .browser__url { background: var(--ink); border-color: var(--cream-border); color: var(--muted-dark); }
.browser__viewport {
    position: relative;
    aspect-ratio: 1366 / 854;
    overflow: hidden;
    background: var(--paper);
}
.browser__viewport iframe {
    position: absolute;
    top: 0; left: 0;
    width: 1366px;
    height: 854px;
    border: 0;
    transform-origin: 0 0;
    pointer-events: none;
}

/* Screen switcher */
.screen-switch {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}
.screen-switch button {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--muted);
    border: 1px solid var(--ink-border);
    border-radius: var(--radius);
    padding: 0.45rem 0.8rem;
    transition: color 0.25s, border-color 0.25s, background-color 0.25s;
}
.screen-switch button:hover { border-color: var(--ink-border-strong); color: var(--ink); }
.screen-switch button.is-active {
    background: var(--ink);
    border-color: var(--ink);
    color: var(--paper);
}
.section--dark .screen-switch button { color: var(--muted-dark); border-color: var(--cream-border); }
.section--dark .screen-switch button:hover { color: var(--cream); }
.section--dark .screen-switch button.is-active {
    background: var(--ember-bright);
    border-color: var(--ember-bright);
    color: var(--ink);
}

/* ----- System diagrams (pure CSS) ----- */
.diagram {
    border: 1px solid var(--ink-border-strong);
    border-radius: var(--radius);
    background: var(--paper-deep);
    padding: clamp(1.25rem, 2.5vw, 2rem);
}
.section--dark .diagram { background: var(--ink-soft); border-color: var(--cream-border); }
.diagram__caption {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--muted);
    padding-bottom: 1rem;
    margin-bottom: 1.25rem;
    border-bottom: 1px solid var(--ink-border);
}
.section--dark .diagram__caption { color: var(--muted-dark); border-color: var(--cream-border); }

.diagram__node {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    border: 1px solid var(--ink-border-strong);
    border-radius: var(--radius);
    padding: 0.75rem 1rem;
    background: var(--paper);
    position: relative;
}
.section--dark .diagram__node { background: var(--ink); border-color: var(--cream-border); }
.diagram__node--ember { border-color: var(--ember); }
.section--dark .diagram__node--ember { border-color: var(--ember-bright); }
.diagram__node em {
    font-style: normal;
    color: var(--ember);
}
.section--dark .diagram__node em { color: var(--ember-bright); }
.diagram__dot {
    width: 8px; height: 8px; border-radius: 50%;
    background: var(--ember); flex-shrink: 0;
}
.section--dark .diagram__dot { background: var(--ember-bright); }

/* vertical connector between stacked nodes */
.diagram__flow { display: flex; flex-direction: column; }
.diagram__flow > * + * { margin-top: 1.6rem; position: relative; }
.diagram__flow > * + *::before {
    content: '';
    position: absolute;
    top: -1.6rem;
    left: 1.4rem;
    height: 1.6rem;
    width: 1px;
    background: var(--ink-border-strong);
}
.section--dark .diagram__flow > * + *::before { background: var(--cream-border); }

/* branch row: two parallel outcomes */
.diagram__branch {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}
.diagram__branch .diagram__node { justify-content: flex-start; gap: 0.6rem; }

/* converge row: inputs above an engine */
.diagram__inputs {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}
.diagram__inputs .diagram__node { justify-content: center; text-align: center; }

/* journal table (flagship) */
.journal { font-family: var(--font-mono); font-size: 0.78rem; }
.journal__row {
    display: grid;
    grid-template-columns: 1fr auto auto;
    gap: 1rem;
    padding: 0.65rem 0;
    border-top: 1px solid var(--ink-border);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--muted);
    font-variant-numeric: tabular-nums;
}
.journal__row span:nth-child(2),
.journal__row span:nth-child(3) { text-align: right; min-width: 5.5rem; }
.journal__row--head {
    border-top: 0;
    padding-top: 0;
    color: var(--ink);
    font-weight: 500;
}
.journal__row--total {
    border-top: 1px solid var(--ink-border-strong);
    color: var(--ember);
    font-weight: 500;
}
.journal__badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1.25rem;
}
.journal__badges span {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--ember);
    border: 1px dashed var(--ember);
    border-radius: var(--radius);
    padding: 0.3rem 0.6rem;
}

/* ----- Additional engagements index ----- */
.engagements__intro { color: var(--muted-dark); max-width: 56ch; margin-top: 1.25rem; }
.index-table { margin-top: clamp(2rem, 4vw, 3rem); }
.index-table__row {
    display: grid;
    grid-template-columns: minmax(11rem, 1fr) 2fr auto;
    gap: 1.5rem;
    align-items: baseline;
    padding: 1.4rem 0;
    border-top: 1px solid var(--cream-border);
}
.index-table__row:last-child { border-bottom: 1px solid var(--cream-border); }
.index-table__title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 460;
    letter-spacing: -0.01em;
}
.index-table__desc { color: var(--muted-dark); font-size: var(--text-small); max-width: 56ch; }
.index-table__tags {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--ember-bright);
    text-align: right;
    white-space: nowrap;
}

/* ----- Closing CTA ----- */
.work-cta { text-align: center; }
.work-cta__title { font-size: var(--text-h1); max-width: 18ch; margin: 1.25rem auto 1.5rem; }
.work-cta__sub { color: var(--muted); max-width: 48ch; margin: 0 auto 2.5rem; }
.work-cta__actions {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
}

/* ----- Responsive ----- */
@media (max-width: 991px) {
    .case__layout,
    .case-section--flip .case__layout { grid-template-columns: 1fr; }
    .case-section--flip .case__body { order: 1; }
    .case-section--flip .case__visual { order: 2; }
    .work-hero__stats { grid-template-columns: repeat(2, 1fr); }
    .index-table__row { grid-template-columns: 1fr; gap: 0.5rem; }
    .index-table__tags { text-align: left; white-space: normal; }
}
@media (max-width: 640px) {
    .case-index__row { grid-template-columns: 3rem 1fr; }
    .case-index__client { grid-column: 2; text-align: left; }
    .spec__row { grid-template-columns: 1fr; gap: 0.25rem; }
    .diagram__branch,
    .diagram__inputs { grid-template-columns: 1fr; }
    .journal__row span:nth-child(2),
    .journal__row span:nth-child(3) { min-width: 4rem; }
}
@media (max-width: 420px) {
    .work-hero__stats { grid-template-columns: 1fr 1fr; gap: 1.25rem; }
}

/* ----- Zoomable previews ----- */
.browser__viewport.is-zoomable { cursor: zoom-in; }
.browser__viewport.is-zoomable::after {
    content: "\2922  View full size";
    position: absolute;
    z-index: 2;
    bottom: 0.75rem;
    right: 0.75rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--paper);
    background: rgba(19, 18, 16, 0.82);
    border-radius: var(--radius);
    padding: 0.4rem 0.7rem;
    opacity: 0;
    transform: translateY(4px);
    transition: opacity 0.25s var(--ease-out), transform 0.25s var(--ease-out);
    pointer-events: none;
}
.browser__viewport.is-zoomable:hover::after,
.browser__viewport.is-zoomable:focus-visible::after { opacity: 1; transform: none; }
.browser__viewport.is-zoomable:focus-visible { outline: 2px solid var(--ember); outline-offset: 3px; }

/* ----- Screen lightbox ----- */
body.lightbox-open { overflow: hidden; }
.screen-lightbox {
    position: fixed;
    inset: 0;
    z-index: 1500; /* above fixed header (1000) and mobile menu (1100–1200) */
    display: flex;
    align-items: center;
    justify-content: center;
    padding: clamp(1rem, 3vw, 2.5rem);
    background: rgba(19, 18, 16, 0.88);
    -webkit-backdrop-filter: blur(6px);
    backdrop-filter: blur(6px);
    opacity: 0;
    transition: opacity 0.3s var(--ease-out);
}
.screen-lightbox[hidden] { display: none; }
.screen-lightbox.is-open { opacity: 1; }
.screen-lightbox__inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    max-width: 100%;
    max-height: 100%;
}
.screen-lightbox__browser {
    background: var(--paper-deep);
    border-color: var(--ink-border-strong);
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.5);
}
.screen-lightbox .browser__viewport { cursor: default; }
.screen-lightbox .browser__viewport::after { content: none; }
.screen-lightbox__close {
    position: absolute;
    top: clamp(0.75rem, 2vw, 1.5rem);
    right: clamp(0.75rem, 2vw, 1.5rem);
    width: 2.75rem;
    height: 2.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    line-height: 1;
    color: var(--paper);
    background: rgba(246, 243, 237, 0.08);
    border: 1px solid var(--cream-border);
    border-radius: var(--radius);
    transition: background-color 0.25s, border-color 0.25s, color 0.25s;
}
.screen-lightbox__close:hover { background: var(--ember); border-color: var(--ember); color: var(--ink); }
.screen-lightbox__switch { justify-content: center; margin-top: 0; }
.screen-lightbox__switch button { color: var(--muted-dark); border-color: var(--cream-border); }
.screen-lightbox__switch button:hover { color: var(--cream); border-color: var(--ink-border-strong); }
.screen-lightbox__switch button.is-active {
    background: var(--ember-bright);
    border-color: var(--ember-bright);
    color: var(--ink);
}
@media (prefers-reduced-motion: reduce) {
    .screen-lightbox { transition: none; }
}