/* ============================================
   FRUITBLOOM DEEP DIVES
   A distinct design framework — editorial,
   long-scroll, diagram-driven.
   ============================================ */

/* --- Palette (shared brand tokens) --- */
:root {
    --dd-navy:   #0C1F37;
    --dd-yellow: #EDE276;
    --dd-white:  #FFFFFF;
    --dd-ink:    #1a2a3a;
    --dd-mist:   #f4f3ee;
    --dd-slate:  #6b7f8e;
    --dd-glow:   rgba(237, 226, 118, 0.12);
}

/* --- Reset for deep dive pages only --- */
body.deepdive-page {
    font-family: 'Overpass Mono', monospace;
    background: var(--dd-mist);
    color: var(--dd-ink);
    line-height: 1.7;
    overflow-x: hidden;
}

/* ============================================
   HERO — full-bleed, cinematic
   ============================================ */
.dd-hero {
    background: var(--dd-navy);
    color: var(--dd-white);
    padding: 6rem 2rem 4rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.dd-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 50% 120%, rgba(237,226,118,0.08) 0%, transparent 60%);
    pointer-events: none;
}

.dd-hero-badge {
    display: inline-block;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    border: 1px solid var(--dd-yellow);
    color: var(--dd-yellow);
    padding: 0.3rem 1rem;
    border-radius: 2px;
    margin-bottom: 1.5rem;
}

.dd-hero-flag {
    display: block;
    font-size: 3.5rem;
    margin-bottom: 0.75rem;
}

.dd-hero h1 {
    font-size: clamp(2.5rem, 7vw, 4.5rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.1;
    background: linear-gradient(180deg, var(--dd-yellow) 0%, var(--dd-white) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.dd-hero-sub {
    font-size: clamp(1rem, 2.5vw, 1.3rem);
    font-weight: 700;
    color: var(--dd-yellow);
}

.dd-hero-origin {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    opacity: 0.45;
    margin-top: 0.5rem;
}

/* ============================================
   SECTIONS — the editorial rhythm
   ============================================ */
.dd-band {
    padding: 4.5rem 2rem;
    position: relative;
}

.dd-band--navy   { background: var(--dd-navy);   color: var(--dd-white); }
.dd-band--mist   { background: var(--dd-mist);   color: var(--dd-ink); }
.dd-band--white  { background: var(--dd-white);   color: var(--dd-ink); }
.dd-band--yellow { background: var(--dd-yellow);  color: var(--dd-navy); }

.dd-contain {
    max-width: 960px;
    margin: 0 auto;
}

.dd-contain--wide {
    max-width: 1100px;
    margin: 0 auto;
}

/* Section eyebrow label */
.dd-eyebrow {
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-bottom: 0.75rem;
    display: block;
}

.dd-band--navy .dd-eyebrow   { color: var(--dd-yellow); }
.dd-band--mist .dd-eyebrow   { color: var(--dd-slate); }
.dd-band--white .dd-eyebrow  { color: var(--dd-slate); }
.dd-band--yellow .dd-eyebrow { color: var(--dd-navy); opacity: 0.6; }

/* Headings */
.dd-band h2 {
    font-size: clamp(1.5rem, 3.5vw, 2.2rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.25rem;
    letter-spacing: -0.01em;
}

/* Prose */
.dd-prose {
    font-size: clamp(0.85rem, 1.4vw, 0.95rem);
    line-height: 1.9;
    max-width: 680px;
}

.dd-prose + .dd-prose {
    margin-top: 1.25rem;
}

.dd-band--navy .dd-prose { opacity: 0.85; }

/* ============================================
   EXPLAINER — "What is X?" intro cards
   ============================================ */
.dd-explainer {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-top: 2rem;
}

.dd-explainer-card {
    background: var(--dd-white);
    border-radius: 6px;
    padding: 2rem;
    border-left: 4px solid var(--dd-yellow);
    box-shadow: 0 1px 4px rgba(0,0,0,0.05);
}

.dd-band--navy .dd-explainer-card {
    background: rgba(255,255,255,0.05);
    border-left-color: var(--dd-yellow);
    box-shadow: none;
}

.dd-explainer-card h3 {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 0.6rem;
}

.dd-band--navy .dd-explainer-card h3 { color: var(--dd-yellow); }

.dd-explainer-card p {
    font-size: 0.82rem;
    line-height: 1.8;
}

/* Single wide explainer */
.dd-explainer--single {
    grid-template-columns: 1fr;
}

.dd-explainer--single .dd-explainer-card {
    max-width: 680px;
}

/* ============================================
   STAT CALLOUT — big number + context
   ============================================ */
.dd-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.dd-stat {
    text-align: center;
    padding: 1.5rem 1rem;
}

.dd-stat-num {
    display: block;
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 700;
    line-height: 1;
    margin-bottom: 0.4rem;
}

.dd-band--navy .dd-stat-num   { color: var(--dd-yellow); }
.dd-band--mist .dd-stat-num   { color: var(--dd-navy); }
.dd-band--yellow .dd-stat-num { color: var(--dd-navy); }

.dd-stat-label {
    font-size: 0.72rem;
    letter-spacing: 0.05em;
    opacity: 0.7;
    line-height: 1.4;
}

/* ============================================
   PHOTONIC VALLEY — Assembly Diagram (full-bleed)
   ============================================ */
.assembly-band {
    padding: 4.5rem 2rem;
    background: var(--dd-navy);
    color: var(--dd-white);
}

.assembly-band .dd-eyebrow { color: var(--dd-yellow); }
.assembly-band h2 {
    font-size: clamp(1.5rem, 3.5vw, 2.2rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.25rem;
    letter-spacing: -0.01em;
    color: var(--dd-white);
}

.assembly-band .dd-prose {
    font-size: clamp(0.85rem, 1.4vw, 0.95rem);
    line-height: 1.9;
    max-width: 680px;
    opacity: 0.85;
    color: var(--dd-white);
}

.assembly-wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 2.5rem 0 1rem;
    max-width: 1200px;
    margin: 0 auto;
}

.assembly-inputs {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    width: 100%;
}

.assembly-input-card {
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(237,226,118,0.25);
    border-radius: 4px;
    padding: 1.25rem 1rem;
    text-align: center;
    transition: border-color 0.2s, background 0.2s;
}

.assembly-input-card:hover {
    border-color: var(--dd-yellow);
    background: rgba(237,226,118,0.06);
}

.assembly-input-card h3 {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--dd-yellow);
    margin-bottom: 0.35rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.assembly-input-card p {
    font-size: 0.72rem;
    line-height: 1.55;
    opacity: 0.6;
}

/* Connectors */
.assembly-connectors {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    width: 100%;
    height: 3rem;
}

.assembly-connector {
    display: flex;
    justify-content: center;
    position: relative;
}

.assembly-connector::after {
    content: '';
    width: 1px;
    height: 100%;
    background: linear-gradient(180deg, rgba(237,226,118,0.15), rgba(237,226,118,0.5));
}

/* Core box */
.assembly-core {
    border: 2px solid var(--dd-yellow);
    background: var(--dd-glow);
    border-radius: 6px;
    padding: 1.75rem 3rem;
    text-align: center;
    position: relative;
}

.assembly-core::before {
    content: '';
    position: absolute;
    inset: -8px;
    border: 1px solid rgba(237,226,118,0.1);
    border-radius: 10px;
    pointer-events: none;
}

.assembly-core h3 {
    font-size: clamp(0.9rem, 2vw, 1.15rem);
    font-weight: 700;
    color: var(--dd-yellow);
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.assembly-core p {
    font-size: 0.75rem;
    opacity: 0.5;
    margin-top: 0.25rem;
}

/* Output propositions */
.assembly-outputs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    width: 100%;
    margin-top: 3rem;
}

.assembly-output-card {
    border-top: 3px solid var(--dd-yellow);
    padding: 1.75rem 1.5rem;
    background: rgba(255,255,255,0.03);
    border-radius: 0 0 6px 6px;
}

.assembly-output-card h3 {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--dd-yellow);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 0.6rem;
}

.assembly-output-card p {
    font-size: 0.8rem;
    line-height: 1.75;
    opacity: 0.75;
}

.assembly-output-card .hl {
    color: var(--dd-yellow);
    font-weight: 700;
}

/* Foundation layer */
.foundation-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
}

.foundation-card {
    background: var(--dd-white);
    color: var(--dd-navy);
    border-radius: 4px;
    padding: 1.25rem;
    border-bottom: 3px solid var(--dd-navy);
}

.foundation-card h3 {
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.35rem;
}

.foundation-card p {
    font-size: 0.75rem;
    line-height: 1.6;
    opacity: 0.75;
}

/* ============================================
   URBAN MINING — Pipeline Comparison
   ============================================ */
.pipeline-header {
    display: grid;
    grid-template-columns: 110px 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 0.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid rgba(237,226,118,0.2);
}

.pipeline-header span {
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

.dd-band--navy .pipeline-header span { color: var(--dd-yellow); opacity: 0.5; }
.pipeline-header span:first-child { opacity: 0.3; }

/* Stage row */
.pipeline-stage {
    display: grid;
    grid-template-columns: 110px 1fr 1fr;
    gap: 1.5rem;
    padding: 1.25rem 0;
    border-bottom: 1px solid rgba(255,255,255,0.05);
    align-items: start;
}

.pipeline-stage-label {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--dd-yellow);
    padding-top: 0.8rem;
    line-height: 1.35;
}

.pipeline-current,
.pipeline-future {
    border-radius: 4px;
    padding: 1.1rem 1.25rem;
    font-size: 0.78rem;
    line-height: 1.75;
}

.pipeline-current {
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.07);
    opacity: 0.6;
}

.pipeline-future {
    background: var(--dd-glow);
    border: 1px solid rgba(237,226,118,0.3);
}

/* FB badge */
.fb-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.55rem;
    font-weight: 700;
    background: var(--dd-yellow);
    color: var(--dd-navy);
    border-radius: 50%;
    width: 1.35rem;
    height: 1.35rem;
    margin-right: 0.45rem;
    vertical-align: middle;
    flex-shrink: 0;
}

/* JP badge (Japanese Tech) */
.jp-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.55rem;
    font-weight: 700;
    background: var(--dd-white);
    color: var(--dd-navy);
    border-radius: 50%;
    width: 1.35rem;
    height: 1.35rem;
    margin-right: 0.45rem;
    vertical-align: middle;
    flex-shrink: 0;
}

/* Divider between upstream & downstream */
.pipeline-divider {
    grid-column: 1 / -1;
    border: none;
    border-top: 2px dashed rgba(237,226,118,0.2);
    margin: 0.75rem 0;
}

/* Outcome comparison */
.pipeline-outcome {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-top: 2.5rem;
}

.outcome-card {
    border-radius: 6px;
    padding: 1.75rem;
}

.outcome-card--before {
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.07);
    opacity: 0.55;
}

.outcome-card--after {
    background: var(--dd-glow);
    border: 2px solid var(--dd-yellow);
}

.outcome-card h3 {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: 0.75rem;
}

.outcome-card--after h3 { color: var(--dd-yellow); }

.outcome-card .stat {
    font-size: 0.88rem;
    font-weight: 700;
    margin-bottom: 0.35rem;
}

.outcome-card--after .stat { color: var(--dd-yellow); }

.outcome-card .desc {
    font-size: 0.75rem;
    line-height: 1.65;
    opacity: 0.75;
}

/* ============================================
   CTA BAND
   ============================================ */
.dd-cta {
    text-align: center;
    padding: 3.5rem 2rem;
    background: var(--dd-yellow);
}

.dd-cta h2 {
    font-size: clamp(1.2rem, 3vw, 1.6rem);
    font-weight: 700;
    color: var(--dd-navy);
    margin-bottom: 1rem;
}

.dd-cta .btn {
    display: inline-block;
    background: var(--dd-navy);
    color: var(--dd-yellow);
    padding: 0.75rem 2rem;
    text-decoration: none;
    font-family: 'Overpass Mono', monospace;
    font-weight: 700;
    font-size: 0.85rem;
    border-radius: 4px;
    transition: transform 0.15s, box-shadow 0.15s;
}

.dd-cta .btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(12,31,55,0.3);
}

/* ============================================
   BACK LINK
   ============================================ */
.dd-back {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--dd-yellow);
    text-decoration: none;
    letter-spacing: 0.05em;
    opacity: 0.6;
    transition: opacity 0.15s;
    margin-top: 1.5rem;
}

.dd-back:hover { opacity: 1; }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    .dd-hero {
        padding: 4rem 1.5rem 3rem;
    }
    .dd-band {
        padding: 3rem 1.25rem;
    }
    .dd-explainer {
        grid-template-columns: 1fr;
    }
    .assembly-inputs {
        grid-template-columns: 1fr 1fr;
    }
    .assembly-connectors {
        grid-template-columns: 1fr 1fr;
        height: 2rem;
    }
    .assembly-outputs {
        grid-template-columns: 1fr;
    }
    .pipeline-header {
        display: none;
    }
    .pipeline-stage {
        grid-template-columns: 1fr 1fr;
        gap: 0.6rem;
    }
    .pipeline-stage-label {
        grid-column: 1 / -1;
        padding-top: 0;
        font-size: 0.82rem;
        border-bottom: 1px solid rgba(237,226,118,0.15);
        padding-bottom: 0.4rem;
    }
    .pipeline-current,
    .pipeline-future {
        font-size: 0.72rem;
    }
    .pipeline-current::before {
        content: 'TODAY';
        display: block;
        font-size: 0.55rem;
        font-weight: 700;
        letter-spacing: 0.1em;
        opacity: 0.5;
        margin-bottom: 0.35rem;
    }
    .pipeline-future::before {
        content: 'FRUITBLOOM';
        display: block;
        font-size: 0.55rem;
        font-weight: 700;
        letter-spacing: 0.1em;
        color: var(--dd-yellow);
        margin-bottom: 0.35rem;
    }
    .pipeline-future--jp::before {
        content: 'JAPANESE TECH';
        color: var(--dd-white);
    }
    .pipeline-outcome {
        grid-template-columns: 1fr 1fr;
    }
    .foundation-grid {
        grid-template-columns: 1fr 1fr;
    }
    .dd-stats {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 480px) {
    .assembly-inputs {
        grid-template-columns: 1fr 1fr;
    }
    .assembly-connectors {
        grid-template-columns: 1fr 1fr;
    }
    .pipeline-stage {
        grid-template-columns: 1fr;
    }
    .pipeline-stage-label {
        grid-column: 1;
    }
    .pipeline-outcome {
        grid-template-columns: 1fr;
    }
    .foundation-grid {
        grid-template-columns: 1fr;
    }
    .dd-stats {
        grid-template-columns: 1fr;
    }
}