/* About.razor scoped styles — "The Liner Notes".

   This page diverges from Home by composition, not vocabulary. The backbone is a
   persistent left RAIL (a continuous vertical hairline carrying oversized Bodoni
   movement numerals + mono marginalia) with the content column offset asymmetrically
   to its right. Movement boundaries are rendered as a hand-authored SVG waveform
   stroke (the D3 motif folded in). Palette tokens, type stack, the dark Process band,
   the feature-card grid, the CTA, and the bw↔colour ParallaxImage crossfade are all
   reused from the site's existing vocabulary — only the structure is new.

   Home's borrowed primitives that this redesign supersedes (.section-divider /
   .divider-line centred rules, the symmetric .section-header-grid 4/8 split, the
   .medium-card grid, .section-split) are intentionally NOT re-declared here. */

/* ── Animations (from DeepDrftHero.razor.css) ── */
@keyframes fade-up {
    from { opacity: 0; transform: translateY(24px); }
    to { opacity: 1; transform: none; }
}

.fade-up {
    opacity: 0;
    animation: fade-up 0.8s ease forwards;
}

/* ── HERO — the page opener (type scale from Home's .hero-*) ── */
.hero {
    min-height: 100vh;
    overflow: hidden;
}

.hero-left {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 6rem 3rem;
    position: relative;
    background: var(--deepdrft-white);
    height: 100%;
}

.hero-image-pane {
    display: flex;
    flex-direction: column;
    justify-content: center;
    background: var(--deepdrft-white);
    height: 100%;
}

@media (max-width: 960px) {
    .hero { min-height: auto; }
    .hero-left { padding: 4rem 1.5rem 3rem; }
}

.hero-eyebrow {
    font-family: var(--deepdrft-font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.28em;
    color: var(--deepdrft-green-accent);
    text-transform: uppercase;
    margin-bottom: 1.8rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    animation-delay: 0.1s;
}

.hero-eyebrow::before {
    content: '';
    display: block;
    width: 2.5rem;
    height: 1px;
    background: var(--deepdrft-green-accent);
}

.hero-title {
    font-family: var(--deepdrft-font-display);
    font-size: clamp(4.5rem, 8vw, 8.5rem);
    font-weight: 300;
    line-height: 0.92;
    letter-spacing: -0.02em;
    color: var(--deepdrft-navy);
    margin-bottom: 0.5rem;
    animation-delay: 0.22s;
}

.hero-title em {
    font-style: italic;
    color: var(--deepdrft-green);
}

.hero-desc {
    font-family: var(--deepdrft-font-body);
    font-size: 0.92rem;
    line-height: 1.75;
    color: var(--deepdrft-navy);
    opacity: 0.7;
    max-width: 36ch;
    margin-bottom: 3rem;
    animation-delay: 0.44s;
}

/* ══════════════════ THE RAIL + SPINE — the signature device ══════════════════

   Each movement is a two-column grid: a narrow rail column on the left carrying the
   continuous vertical hairline (the narrative spine), the oversized Bodoni numeral,
   and the mono marginalia; the content column to its right. The rail column is
   ~14% of the page on desktop and collapses to an inline header on mobile. */
.movement {
    display: grid;
    grid-template-columns: minmax(140px, 14%) minmax(0, 1fr);
    background: var(--deepdrft-white);
    align-items: start;
}

.rail {
    position: relative;
    align-self: stretch;
    padding: 4rem 0 4rem 3rem;
}

/* The continuous vertical hairline — Home's horizontal .divider-line reoriented,
   the same --deepdrft-border token, running the length of the movement. */
.rail-line {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 3rem;
    width: 1px;
    background: var(--deepdrft-border);
}

/* Oversized Bodoni movement numeral. Sticks near the top of the viewport as the
   movement scrolls, low-opacity navy by default; the active movement lights green
   (toggled by the IntersectionObserver — see Interop/about/about-rail.ts). */
.rail-numeral {
    position: sticky;
    top: 6rem;
    font-family: var(--deepdrft-font-display);
    font-size: clamp(5rem, 10vw, 9rem);
    font-weight: 300;
    line-height: 1;
    letter-spacing: -0.04em;
    color: var(--deepdrft-navy);
    opacity: 0.14;
    padding-left: 1.4rem;
    transition: color 0.5s ease, opacity 0.5s ease;
}

.movement.is-active .rail-numeral {
    color: var(--deepdrft-green-accent);
    opacity: 0.95;
}

/* Mono marginalia — a rotated caption set against the spine, the way a magazine
   annotates a photo. Reuses the mono eyebrow idiom. */
.rail-margin {
    position: sticky;
    top: 16rem;
    margin-top: 2rem;
    padding-left: 1.4rem;
    font-family: var(--deepdrft-font-mono);
    font-size: 0.58rem;
    letter-spacing: 0.24em;
    text-transform: uppercase;
    color: var(--deepdrft-muted);
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    transform-origin: center;
    height: 12rem;
}

/* ── The content column — asymmetric, left-anchored prose ── */
.movement-content {
    padding: 4rem 3rem 5rem 1rem;
    min-width: 0;
}

/* ══════════════════ WAVEFORM MOVEMENT DIVIDER (D3 motif) ══════════════════
   A self-contained SVG oscillation stroke with the mono movement tag sitting on it.
   Replaces Home's flat .divider-line rule between movements. */
.wave-divider {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 4rem;
}

.wave-stroke {
    flex: 1;
    height: 28px;
    min-width: 0;
    overflow: visible;
}

.wave-stroke path {
    fill: none;
    stroke: var(--deepdrft-green-accent);
    stroke-width: 1.4;
    opacity: 0.7;
    vector-effect: non-scaling-stroke;
}

.wave-tag {
    flex-shrink: 0;
    font-family: var(--deepdrft-font-mono);
    font-size: 0.62rem;
    letter-spacing: 0.28em;
    text-transform: uppercase;
    color: var(--deepdrft-navy);
    white-space: nowrap;
}

/* ── Movement intro — prose hanging at a consistent left edge ── */
.movement-intro {
    max-width: 60ch;
    margin-bottom: 5rem;
}

.movement-label {
    font-family: var(--deepdrft-font-mono);
    font-size: 0.62rem;
    letter-spacing: 0.28em;
    color: var(--deepdrft-green-accent);
    text-transform: uppercase;
    margin-bottom: 1.4rem;
}

.movement-title {
    font-family: var(--deepdrft-font-display);
    font-size: clamp(2.6rem, 5vw, 4.2rem);
    font-weight: 300;
    line-height: 1.02;
    color: var(--deepdrft-navy);
    margin-bottom: 2rem;
}

.movement-title em {
    font-style: italic;
    color: var(--deepdrft-green);
}

.movement-prose {
    font-family: var(--deepdrft-font-body);
    font-size: 0.95rem;
    line-height: 1.85;
    color: var(--deepdrft-navy);
    opacity: 0.72;
    max-width: 56ch;
}

/* ── Member bio pair — framed portrait insets with rail-side captions ──
   Assembled from the existing type tokens (display serif name, mono caption/role,
   body prose). The cards are offset/staggered rather than an even grid. */
.bio-pair {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 3rem;
    align-items: start;
}

/* Stagger the second card downward so the pair reads as editorial layout, not a
   symmetric grid. */
.bio-card:nth-child(2) {
    margin-top: 4rem;
}

.bio-card {
    display: flex;
    flex-direction: column;
}

.bio-portrait {
    width: 80%;
    aspect-ratio: 1 / 1;
    overflow: hidden;
    border: 1px solid var(--deepdrft-border);
    border-radius: 50%;
}

/* Graceful-degrade slot shown until a portrait file lands. A flat tonal panel in
   the navy family, matching the circular portrait frame. */
.bio-portrait-placeholder {
    width: 100%;
    aspect-ratio: 1 / 1;
    background:
        linear-gradient(160deg,
            color-mix(in srgb, var(--deepdrft-navy) 8%, var(--deepdrft-white)) 0%,
            color-mix(in srgb, var(--deepdrft-navy) 16%, var(--deepdrft-white)) 100%);
}

/* The marginalia caption — mono, sits directly under the framed portrait. */
.bio-caption {
    font-family: var(--deepdrft-font-mono);
    font-size: 0.56rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--deepdrft-muted);
    margin-top: 0.9rem;
    padding-left: 0.1rem;
}

.bio-meta {
    padding-top: 1.4rem;
}

.bio-name {
    font-family: var(--deepdrft-font-display);
    font-size: 2rem;
    font-weight: 300;
    line-height: 1.1;
    color: var(--deepdrft-navy);
    margin-bottom: 1rem;
}

.bio-body {
    font-family: var(--deepdrft-font-body);
    font-size: 0.85rem;
    line-height: 1.8;
    color: var(--deepdrft-navy);
    opacity: 0.7;
}

.bio-body + .bio-body {
    margin-top: 0.75em;
}

/* ── Inset framed figure (gear shot) with rail-side caption ── */
.movement-figure {
    margin: 5rem 0 0;
}

.movement-figure ::deep .parallax-window {
    border: 1px solid var(--deepdrft-border);
}

.figure-caption {
    font-family: var(--deepdrft-font-mono);
    font-size: 0.56rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--deepdrft-muted);
    margin-top: 0.9rem;
}

/* ══════════════════ THE PROCESS — dark band (reused vocabulary) ══════════════════ */
.process-band {
    background: var(--deepdrft-navy);
    padding: 4.5rem 3rem;
    color: var(--deepdrft-white);
}

.process-label {
    font-family: var(--deepdrft-font-mono);
    font-size: 0.62rem;
    letter-spacing: 0.28em;
    color: var(--deepdrft-green-accent);
    text-transform: uppercase;
    margin-bottom: 1.2rem;
}

.process-title {
    font-family: var(--deepdrft-font-display);
    font-size: clamp(2.4rem, 4.5vw, 3.8rem);
    font-weight: 300;
    line-height: 1.02;
    color: var(--deepdrft-white);
}

.process-title em {
    font-style: italic;
    color: var(--deepdrft-green-accent);
}

.process-standfirst {
    font-family: var(--deepdrft-font-body);
    font-size: 0.92rem;
    line-height: 1.8;
    color: rgba(250, 250, 248, 0.55);
    max-width: 56ch;
    margin-top: 2rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0;
    border: 1px solid rgba(250, 250, 248, 0.08);
    margin-top: 3.5rem;
}

.feature-card {
    padding: 2.5rem;
    border-right: 1px solid rgba(250, 250, 248, 0.08);
    border-bottom: 1px solid rgba(250, 250, 248, 0.08);
    transition: background 0.3s;
}

/* 2×2 grid: kill the right border on the right column and the bottom border on the
   last row so the outer frame stays clean. */
.feature-card:nth-child(2n) { border-right: none; }
.feature-card:nth-child(n + 3) { border-bottom: none; }

.feature-card:hover { background: rgba(250, 250, 248, 0.04); }

.feature-icon {
    width: 2.5rem;
    height: 2.5rem;
    border: 1px solid rgba(250, 250, 248, 0.15);
    margin-bottom: 1.8rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-icon svg {
    width: 1rem;
    height: 1rem;
    stroke: var(--deepdrft-green-accent);
    fill: none;
    stroke-width: 1.5;
}

.feature-title {
    font-family: var(--deepdrft-font-display);
    font-size: 1.3rem;
    font-weight: 400;
    color: var(--deepdrft-white);
    margin-bottom: 0.8rem;
    line-height: 1.2;
}

.feature-desc {
    font-family: var(--deepdrft-font-body);
    font-size: 0.8rem;
    line-height: 1.7;
    color: rgba(250, 250, 248, 0.45);
}

/* ══════════════════ THE PRODUCT — medium list + pull-quote ══════════════════
   A stacked editorial definition list, not Home's card grid. */
.medium-list {
    list-style: none;
    margin: 0 0 5rem;
    padding: 0;
    border-top: 1px solid var(--deepdrft-border);
    max-width: 60ch;
}

.medium-row {
    border-bottom: 1px solid var(--deepdrft-border);
}

.medium-row a {
    display: flex;
    align-items: baseline;
    gap: 1.5rem;
    padding: 1.6rem 0.4rem;
    text-decoration: none;
    transition: padding-left 0.25s ease;
}

.medium-row a:hover { padding-left: 1.2rem; }

.medium-row-name {
    flex-shrink: 0;
    font-family: var(--deepdrft-font-display);
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--deepdrft-navy);
    min-width: 7rem;
}

.medium-row a:hover .medium-row-name { color: var(--deepdrft-green-accent); }

.medium-row-desc {
    font-family: var(--deepdrft-font-body);
    font-size: 0.85rem;
    line-height: 1.6;
    color: var(--deepdrft-navy);
    opacity: 0.6;
}

/* The sharp pull-quote — breaks LEFT into the rail margin at large serif scale. */
.pull-quote {
    margin: 0;
    max-width: 70ch;
}

.pull-eyebrow {
    display: block;
    font-family: var(--deepdrft-font-mono);
    font-size: 0.6rem;
    letter-spacing: 0.28em;
    text-transform: uppercase;
    color: var(--deepdrft-green-accent);
    margin-bottom: 1.4rem;
}

.pull-quote p {
    font-family: var(--deepdrft-font-display);
    font-size: clamp(1.8rem, 3.4vw, 2.9rem);
    font-weight: 300;
    line-height: 1.15;
    color: var(--deepdrft-navy);
}

/* ══════════════════ CLOSING CTA (reused vocabulary) ══════════════════ */
.cta-banner {
    background: var(--deepdrft-navy);
    padding: 6rem 3rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 3rem;
    position: relative;
    overflow: hidden;
}

.cta-banner::before {
    content: 'DRFT';
    position: absolute;
    right: -2rem;
    top: 50%;
    transform: translateY(-50%);
    font-family: var(--deepdrft-font-display);
    font-size: 22rem;
    font-weight: 300;
    color: rgba(250, 250, 248, 0.03);
    line-height: 1;
    pointer-events: none;
    user-select: none;
    letter-spacing: -0.05em;
}

.cta-text {
    position: relative;
    z-index: 1;
}

.cta-headline {
    font-family: var(--deepdrft-font-display);
    font-size: clamp(2.5rem, 5vw, 5rem);
    font-weight: 300;
    color: var(--deepdrft-white);
    line-height: 1;
    margin-bottom: 1rem;
}

.cta-headline em {
    font-style: italic;
    color: var(--deepdrft-green-accent);
}

.cta-sub {
    font-family: var(--deepdrft-font-body);
    font-size: 0.88rem;
    color: rgba(250, 250, 248, 0.4);
    letter-spacing: 0.05em;
}

.cta-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
    position: relative;
    z-index: 1;
    flex-shrink: 0;
    flex-wrap: wrap;
}

.btn-white {
    font-family: var(--deepdrft-font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--deepdrft-navy);
    background: var(--deepdrft-white);
    border: none;
    padding: 1rem 2.2rem;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.25s, color 0.25s;
    display: inline-block;
}

.btn-white:hover {
    background: var(--deepdrft-green-accent);
    color: var(--deepdrft-white);
}

.btn-outline-white {
    font-family: var(--deepdrft-font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--deepdrft-white);
    background: transparent;
    border: 1px solid rgba(250, 250, 248, 0.3);
    padding: 1rem 2.2rem;
    cursor: pointer;
    text-decoration: none;
    transition: border-color 0.25s;
    display: inline-block;
}

.btn-outline-white:hover { border-color: var(--deepdrft-white); }

/* ══════════════════ RESPONSIVE COLLAPSE ══════════════════

   Below 960px the rail collapses: the spine + vertical numeral can't survive a
   narrow viewport, so the numeral goes inline above each movement (horizontal,
   left-aligned) and the marginalia folds away. Content goes single-column. */
@media (max-width: 960px) {
    .movement {
        display: block;
    }

    .rail {
        padding: 2.5rem 1.5rem 0;
    }

    /* Spine becomes a short horizontal accent under the inline numeral. */
    .rail-line {
        position: static;
        width: 3rem;
        height: 2px;
        margin-top: 1rem;
        background: var(--deepdrft-border);
    }

    .rail-numeral {
        position: static;
        opacity: 0.18;
        padding-left: 0;
        font-size: clamp(3.5rem, 16vw, 5.5rem);
    }

    .movement.is-active .rail-numeral {
        opacity: 0.95;
    }

    /* Marginalia is editorial chrome the narrow column can't host — drop it. */
    .rail-margin {
        display: none;
    }

    .movement-content {
        padding: 2.5rem 1.5rem 3.5rem;
    }

    .process-band { padding: 3.5rem 1.5rem; }

    /* Pull-quote can't break into a rail that no longer exists. */
    .pull-quote {
        margin-left: 0;
        max-width: 100%;
    }
}

@media (max-width: 720px) {
    /* Bio pair stacks; drop the stagger so cards align cleanly. */
    .bio-pair {
        grid-template-columns: 1fr;
        gap: 3.5rem;
    }

    .bio-card:nth-child(2) {
        margin-top: 0;
    }
}

@media (max-width: 599px) {
    .features-grid { grid-template-columns: 1fr; }
    .feature-card {
        border-right: none;
        border-bottom: 1px solid rgba(250, 250, 248, 0.08);
    }
    .feature-card:last-child { border-bottom: none; }

    .medium-row a {
        flex-direction: column;
        gap: 0.4rem;
    }

    .cta-banner {
        flex-direction: column;
        align-items: flex-start;
        gap: 2rem;
        padding: 4rem 1.5rem;
    }

    .cta-actions {
        width: 100%;
    }

    .btn-white,
    .btn-outline-white {
        flex: 1;
        text-align: center;
        min-width: 140px;
    }

    .cta-banner::before {
        font-size: 8rem;
        right: -0.5rem;
    }
}