/* case-study.css — Shared template for all void framework case study pages
   Companion to ink-steel.css. Expects --bg, --surface, --border, --text,
   --text-dim, --accent, --red, --green, --orange variables from ink-steel.css
   ------------------------------------------------------------------- */

/* ── Page wrapper ──────────────────────────────────────────────────── */
.cs-wrap {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 1.5rem 6rem;
}

/* ── Three.js showcase hero ────────────────────────────────────────── */
.cs-showcase {
    width: 100%;
    height: 420px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    position: relative;
    overflow: hidden;
    margin-bottom: 0;
}
.cs-showcase canvas {
    display: block;
    width: 100% !important;
    height: 100% !important;
}
.cs-showcase-label {
    position: absolute;
    bottom: 1rem;
    left: 1.5rem;
    font-size: 0.62rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--text-faint, #5a5250);
    pointer-events: none;
}
.cs-showcase-overlay {
    position: absolute;
    top: 1rem;
    right: 1.5rem;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.4rem;
    pointer-events: none;
}
.cs-pe-badge {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    padding: 0.3rem 0.6rem;
    border: 1px solid;
    background: rgba(12,9,8,0.8);
}
.cs-pe-badge.high  { color: var(--red);    border-color: var(--red); }
.cs-pe-badge.med   { color: var(--orange); border-color: var(--orange); }
.cs-pe-badge.low   { color: var(--green);  border-color: var(--green); }

/* ── Stat bar ──────────────────────────────────────────────────────── */
.cs-statbar {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    border-bottom: 1px solid var(--border);
    margin-bottom: 3rem;
}
.cs-stat {
    padding: 1.2rem 1.5rem;
    border-right: 1px solid var(--border);
    text-align: center;
}
.cs-stat:last-child { border-right: none; }
.cs-stat-n {
    display: block;
    font-size: 1.9rem;
    font-weight: 700;
    line-height: 1;
    font-variant-numeric: tabular-nums;
    color: var(--accent);
}
.cs-stat-n.red    { color: var(--red); }
.cs-stat-n.green  { color: var(--green); }
.cs-stat-n.blue   { color: #4fa8d4; }
.cs-stat-n.purple { color: #9f7aea; }
.cs-stat-lbl {
    font-size: 0.68rem;
    color: var(--text-faint, #5a5250);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-top: 0.35rem;
}

/* ── Hero text ─────────────────────────────────────────────────────── */
.cs-hero {
    padding: 3rem 0 2.5rem;
    border-bottom: 1px solid var(--border);
    margin-bottom: 2.5rem;
}
.cs-eyebrow {
    font-size: 0.62rem;
    font-weight: 700;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 1rem;
    display: block;
}
.cs-hero h1 {
    font-size: clamp(1.8rem, 4.5vw, 2.8rem);
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: 1.2rem;
}
.cs-hero h1 em {
    color: var(--accent);
    font-style: normal;
}
.cs-lead {
    font-size: 1.1rem;
    line-height: 1.75;
    color: var(--text-dim, #a09890);
    max-width: 680px;
}

/* ── Section ───────────────────────────────────────────────────────── */
.cs-section {
    margin-bottom: 2.5rem;
    padding-bottom: 2.5rem;
    border-bottom: 1px solid var(--border);
}
.cs-section:last-child {
    border-bottom: none;
}
.cs-section h2 {
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    margin-bottom: 1.2rem;
    padding-left: 0.8rem;
    border-left: 3px solid var(--accent);
}
.cs-section h2.red    { border-color: var(--red); }
.cs-section h2.green  { border-color: var(--green); }
.cs-section h2.blue   { border-color: #4fa8d4; }
.cs-section h2.purple { border-color: #9f7aea; }
.cs-section p {
    color: var(--text-dim, #a09890);
    line-height: 1.75;
    margin-bottom: 1rem;
}
.cs-section p:last-child { margin-bottom: 0; }

/* ── O · R · α dimension grid ──────────────────────────────────────── */
.cs-dims {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: var(--border);
    border: 1px solid var(--border);
    margin: 1.5rem 0;
}
.cs-dim {
    background: var(--surface);
    padding: 1.2rem;
    text-align: center;
}
.cs-dim-letter {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--accent);
    display: block;
    margin-bottom: 0.3rem;
}
.cs-dim-val {
    font-size: 0.7rem;
    color: var(--text-faint, #5a5250);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    display: block;
    margin-bottom: 0.4rem;
}
.cs-dim-pips {
    display: flex;
    justify-content: center;
    gap: 3px;
    margin-top: 0.4rem;
}
.cs-pip {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--border);
}
.cs-pip.on { background: var(--accent); }
.cs-pip.on.red { background: var(--red); }

/* ── Accordion (deep dive) ─────────────────────────────────────────── */
.cs-accordion {
    margin: 1.5rem 0;
}
.cs-acc-item {
    border: 1px solid var(--border);
    margin-bottom: -1px;
}
.cs-acc-trigger {
    width: 100%;
    background: none;
    border: none;
    color: var(--text, #f5f2f0);
    font: inherit;
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    padding: 1rem 1.2rem;
    text-align: left;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}
.cs-acc-trigger:hover { background: var(--surface); }
.cs-acc-arrow {
    font-size: 0.75rem;
    transition: transform 0.2s;
    flex-shrink: 0;
    color: var(--text-faint, #5a5250);
}
.cs-acc-item.open .cs-acc-arrow { transform: rotate(180deg); }
.cs-acc-panel {
    display: none;
    padding: 0 1.2rem 1.2rem;
    color: var(--text-dim, #a09890);
    font-size: 0.88rem;
    line-height: 1.75;
    border-top: 1px solid var(--border);
}
.cs-acc-item.open .cs-acc-panel { display: block; }
.cs-acc-panel p { margin-bottom: 0.8rem; }
.cs-acc-panel p:last-child { margin-bottom: 0; }
.cs-acc-panel ul {
    margin: 0.5rem 0 0.8rem 1.2rem;
}
.cs-acc-panel li {
    margin-bottom: 0.4rem;
}
.cs-acc-panel .highlight {
    color: var(--accent);
    font-weight: 700;
}

/* ── Prediction list ───────────────────────────────────────────────── */
.cs-predictions {
    list-style: none;
    margin: 0;
    padding: 0;
}
.cs-predictions li {
    padding: 0.8rem 0;
    border-bottom: 1px solid var(--border);
    font-size: 0.88rem;
    color: var(--text-dim, #a09890);
    line-height: 1.6;
    display: grid;
    grid-template-columns: 1.8rem 1fr;
    gap: 0.5rem;
    align-items: start;
}
.cs-predictions li:last-child { border-bottom: none; }
.cs-pred-num {
    font-size: 0.72rem;
    color: var(--accent);
    font-weight: 700;
    padding-top: 0.1rem;
}

/* ── Cross-reference grid ──────────────────────────────────────────── */
.cs-xref {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}
.cs-xref-title {
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--text-faint, #5a5250);
    margin-bottom: 1rem;
}
.cs-xref-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}
.cs-xref-card {
    display: block;
    padding: 0.9rem 1rem;
    background: var(--surface);
    border: 1px solid var(--border);
    text-decoration: none;
    color: var(--text-dim, #a09890);
    font-size: 0.82rem;
    transition: border-color 0.15s, color 0.15s;
}
.cs-xref-card:hover {
    border-color: var(--accent);
    color: var(--text, #f5f2f0);
}
.cs-xref-card strong {
    display: block;
    color: var(--text, #f5f2f0);
    font-size: 0.78rem;
    margin-bottom: 0.2rem;
}
.cs-xref-card .cs-xref-pe {
    font-size: 0.68rem;
    color: var(--text-faint, #5a5250);
}
.cs-nav-links {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    font-size: 0.82rem;
}
.cs-nav-links a {
    color: var(--text-dim, #a09890);
    text-decoration: none;
    padding: 0.5rem 0;
    border-bottom: 1px solid transparent;
}
.cs-nav-links a:hover {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

/* ── Pull quote ────────────────────────────────────────────────────── */
.cs-quote {
    border-left: 3px solid var(--accent);
    padding: 1rem 1.5rem;
    margin: 1.5rem 0;
    background: var(--surface);
}
.cs-quote p {
    font-size: 1rem;
    font-style: italic;
    color: var(--text-dim, #a09890) !important;
    margin-bottom: 0.4rem !important;
}
.cs-quote cite {
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    color: var(--text-faint, #5a5250);
    font-style: normal;
}

/* ── Inline table ──────────────────────────────────────────────────── */
.cs-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.82rem;
    margin: 1rem 0;
}
.cs-table th {
    text-align: left;
    padding: 0.6rem 0.8rem;
    border-bottom: 1px solid var(--border);
    color: var(--text-faint, #5a5250);
    font-size: 0.68rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    font-weight: 700;
}
.cs-table td {
    padding: 0.6rem 0.8rem;
    border-bottom: 1px solid var(--border);
    color: var(--text-dim, #a09890);
}
.cs-table tr:last-child td { border-bottom: none; }
.cs-table .accent { color: var(--accent); font-weight: 700; }
.cs-table .red    { color: var(--red);    font-weight: 700; }
.cs-table .green  { color: var(--green);  font-weight: 700; }

/* ── Responsive ────────────────────────────────────────────────────── */
@media (max-width: 600px) {
    .cs-showcase { height: 300px; }
    .cs-dims { grid-template-columns: repeat(3, 1fr); }
    .cs-statbar { grid-template-columns: repeat(2, 1fr); }
    .cs-stat:nth-child(2n) { border-right: none; }
    .cs-stat { padding: 1rem; }
    .cs-stat-n { font-size: 1.5rem; }
}

/* ── Accordion init script (inline-free) ───────────────────────────── */