/* ===================================================
   DELTA — Portfolio detail page shared styles
   Used by all individual portfolio-*.html pages
   =================================================== */

/* ============ HERO ============ */
.ph{position:relative;height:88vh;min-height:600px;background:#15140F;overflow:hidden}
.ph__img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;animation:slowzoom 24s ease-in-out infinite alternate}
.ph__img--contain{object-fit:contain;background:#0E0D0A;padding:40px}
.ph::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(21,20,15,0.2) 0%,rgba(21,20,15,0.35) 50%,rgba(21,20,15,0.92) 100%);z-index:1}
.ph__crop{position:absolute;width:14px;height:14px;border:1.5px solid var(--accent);z-index:2}
.ph__crop--tl{top:20px;left:20px;border-right:0;border-bottom:0}
.ph__crop--tr{top:20px;right:20px;border-left:0;border-bottom:0}
.ph__crop--bl{bottom:20px;left:20px;border-right:0;border-top:0}
.ph__crop--br{bottom:20px;right:20px;border-left:0;border-top:0}
.ph__inner{position:absolute;left:8%;right:8%;bottom:72px;z-index:3;color:#F4F1EB;display:grid;grid-template-columns:1fr auto;gap:32px;align-items:end}
.ph__tag{display:inline-flex;align-items:center;gap:10px;padding:7px 14px;border:1px solid rgba(244,241,235,0.3);border-radius:999px;font-family:var(--font-mono);font-size:11px;letter-spacing:0.18em;text-transform:uppercase;margin-bottom:24px;background:rgba(21,20,15,0.5);backdrop-filter:blur(12px)}
.ph__tag .dot{width:7px;height:7px;background:var(--accent);border-radius:50%}
.ph__title{font-family:var(--font-display);font-weight:400;font-size:clamp(48px,7.5vw,128px);line-height:0.94;letter-spacing:-0.025em;margin:0 0 24px;color:#F4F1EB;max-width:1000px;text-wrap:balance}
.ph__meta{display:flex;gap:36px;flex-wrap:wrap;font-family:var(--font-mono);font-size:10px;letter-spacing:0.2em;color:#9A968F;text-transform:uppercase}
.ph__meta strong{color:var(--accent);display:block;margin-top:6px;font-family:var(--font-display);font-size:18px;font-weight:400;letter-spacing:-0.01em;text-transform:none}
.ph__cta{display:flex;flex-direction:column;gap:10px;align-items:flex-end}
@media (max-width:900px){.ph__inner{grid-template-columns:1fr;left:24px;right:24px;bottom:48px}.ph__cta{align-items:flex-start}}
@media (max-width:600px){.ph{height:70vh;min-height:420px}.ph__inner{left:16px;right:16px;bottom:32px;gap:20px}.ph__title{font-size:clamp(32px,12vw,56px)}.ph__meta{gap:18px;font-size:9px}.ph__cta{width:100%;align-items:stretch}.ph__cta .btn{justify-content:center}}
@media (max-width:420px){.ph{height:62vh;min-height:380px}.ph__crop{display:none}.ph__inner{left:12px;right:12px;bottom:24px}.ph__meta{flex-direction:column;gap:10px}}

/* ============ SPECS row ============ */
.specs{padding:48px 40px;background:var(--bg-soft);border-bottom:1px solid var(--line)}
.specs__inner{max-width:var(--container);margin:0 auto;display:grid;grid-template-columns:repeat(4,1fr);gap:32px}
.specs__cell{display:flex;flex-direction:column;gap:4px}
.specs__lbl{font-family:var(--font-mono);font-size:10px;letter-spacing:0.2em;text-transform:uppercase;color:var(--fg-muted)}
.specs__val{font-family:var(--font-display);font-size:20px;font-weight:400;letter-spacing:-0.01em;line-height:1.2}
@media (max-width:900px){.specs__inner{grid-template-columns:1fr 1fr}.specs{padding:32px 20px}}
@media (max-width:520px){.specs{padding:24px 16px}.specs__inner{grid-template-columns:1fr;gap:16px}}

/* ============ BIM GALLERY ============ */
.bim{padding:120px 40px;max-width:var(--container);margin:0 auto}
.bim__head{display:grid;grid-template-columns:1fr 1.5fr;gap:64px;margin-bottom:64px;align-items:start}
.bim__head h2{font-family:var(--font-display);font-size:clamp(36px,5vw,64px);font-weight:400;line-height:0.98;letter-spacing:-0.02em;margin:14px 0 0;text-wrap:balance}
.bim__head h2 em{color:var(--accent);font-style:normal}
.bim__head p{font-size:18px;line-height:1.65;color:var(--fg);margin:0;text-wrap:pretty}

.bim__disc{margin-bottom:80px}
.bim__disc:last-child{margin-bottom:0}
.bim__disc-head{display:flex;align-items:baseline;gap:24px;margin-bottom:24px;padding-bottom:16px;border-bottom:1px solid var(--line)}
.bim__disc-num{font-family:var(--font-mono);font-size:11px;letter-spacing:0.18em;text-transform:uppercase;color:var(--accent);min-width:44px}
.bim__disc-title{font-family:var(--font-display);font-size:28px;font-weight:400;letter-spacing:-0.01em;margin:0;flex:1}
.bim__disc-meta{font-family:var(--font-mono);font-size:11px;letter-spacing:0.16em;text-transform:uppercase;color:var(--fg-muted)}
.bim__disc-caption{font-size:15px;line-height:1.6;color:var(--fg-muted);max-width:780px;margin:-12px 0 28px;text-wrap:pretty}

.bim__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.bim__grid--feature{grid-template-columns:2fr 1fr 1fr}
.bim__grid--feature .bim__cell:first-child{grid-row:span 2}
.bim__cell{position:relative;background:#F7F5F0;border:1px solid var(--line);aspect-ratio:4/3;overflow:hidden;cursor:zoom-in;transition:transform 280ms var(--ease-out),box-shadow 280ms var(--ease-out)}
.bim__cell:hover{transform:translateY(-2px);box-shadow:0 24px 50px -28px rgba(21,20,15,0.18);border-color:var(--accent)}
.bim__cell img{width:100%;height:100%;object-fit:contain;display:block;padding:6px;background:#FFFFFF}
.bim__cell--cover img{object-fit:cover;padding:0}
.bim__cell-tag{position:absolute;top:10px;left:10px;font-family:var(--font-mono);font-size:9px;letter-spacing:0.18em;text-transform:uppercase;color:#15140F;background:rgba(255,255,255,0.92);padding:5px 9px;border:1px solid rgba(21,20,15,0.08);backdrop-filter:blur(4px);z-index:2}
.bim__cell-zoom{position:absolute;top:10px;right:10px;width:32px;height:32px;background:rgba(21,20,15,0.82);color:#F4F1EB;border-radius:50%;display:grid;place-items:center;opacity:0;transition:opacity 200ms;z-index:2}
.bim__cell:hover .bim__cell-zoom{opacity:1}
.bim__cell-zoom svg{width:14px;height:14px;stroke:currentColor;stroke-width:1.8;fill:none}

@media (max-width:1100px){.bim{padding:80px 20px}.bim__head{grid-template-columns:1fr;gap:24px;margin-bottom:40px}.bim__grid,.bim__grid--feature{grid-template-columns:1fr 1fr;gap:12px}.bim__grid--feature .bim__cell:first-child{grid-row:auto}}
@media (max-width:600px){.bim{padding:56px 16px}.bim__disc{margin-bottom:48px}.bim__disc-head{flex-wrap:wrap;gap:12px}.bim__disc-title{min-width:100%;font-size:24px}.bim__grid,.bim__grid--feature{grid-template-columns:1fr}.bim__cell-tag{font-size:8px;padding:4px 8px}}

/* ============ CASE STUDY ============ */
.cs{padding:120px 40px;max-width:var(--container);margin:0 auto}
.cs__intro{display:grid;grid-template-columns:1fr 1.5fr;gap:64px;margin-bottom:80px;align-items:start}
.cs__intro h2{font-family:var(--font-display);font-size:clamp(36px,5vw,64px);font-weight:400;line-height:0.98;letter-spacing:-0.02em;margin:14px 0 0;text-wrap:balance}
.cs__intro h2 em{color:var(--accent);font-style:normal}
.cs__intro p{font-size:18px;line-height:1.65;color:var(--fg);margin:0;text-wrap:pretty}
.cs__sections{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.cs__sec{background:var(--bg);padding:40px 32px;display:flex;flex-direction:column;gap:14px;min-height:320px}
.cs__sec-num{font-family:var(--font-display);font-style:italic;font-weight:300;font-size:72px;line-height:1;color:var(--accent);margin-bottom:8px}
.cs__sec-title{font-family:var(--font-mono);font-size:11px;letter-spacing:0.18em;text-transform:uppercase;color:var(--fg-muted);padding-bottom:10px;border-bottom:1px solid var(--line)}
.cs__sec-name{font-family:var(--font-display);font-size:26px;font-weight:400;margin:0;letter-spacing:-0.01em;line-height:1.1}
.cs__sec-body{font-size:15px;line-height:1.65;color:var(--fg);margin:0}
@media (max-width:1100px){.cs__intro{grid-template-columns:1fr;gap:24px}.cs__sections{grid-template-columns:1fr}.cs{padding:80px 20px}}
@media (max-width:600px){.cs{padding:56px 16px}.cs__intro{margin-bottom:40px}.cs__sec{min-height:auto;padding:28px 24px}.cs__sec-num{font-size:48px}.cs__sec-name{font-size:22px}.cs__sec-body{font-size:14px}}

/* ============ DISCIPLINES band ============ */
.dband{padding:80px 40px;background:var(--delta-ink);color:#F4F1EB;--fg:#F4F1EB;--fg-muted:#A8A29A;--line:rgba(244,241,235,0.10);overflow:hidden}
.dband__inner{max-width:var(--container);margin:0 auto;display:grid;grid-template-columns:1fr 1.3fr;gap:64px;align-items:center}
.dband__title{font-family:var(--font-display);font-weight:400;font-size:clamp(32px,4vw,56px);line-height:0.98;letter-spacing:-0.02em;margin:14px 0 0;color:#F4F1EB}
.dband__title em{color:var(--accent);font-style:normal}
.dband__pills{display:flex;flex-wrap:wrap;gap:10px}
.dband__pill{font-family:var(--font-mono);font-size:11px;letter-spacing:0.16em;padding:10px 16px;background:rgba(244,241,235,0.06);border:1px solid rgba(244,241,235,0.18);border-radius:999px;color:#F4F1EB;text-transform:uppercase;transition:all 220ms var(--ease-out)}
.dband__pill:hover{background:var(--accent);border-color:var(--accent);color:#fff;transform:translateY(-1px)}
@media (max-width:1100px){.dband__inner{grid-template-columns:1fr;gap:32px}.dband{padding:60px 20px}}
@media (max-width:600px){.dband{padding:44px 16px}.dband__pills{gap:8px}.dband__pill{font-size:9px;padding:8px 12px}}

/* ============ CTA strip ============ */
.pcta{padding:120px 40px;text-align:center;max-width:var(--container);margin:0 auto}
.pcta__title{font-family:var(--font-display);font-size:clamp(40px,6vw,88px);font-weight:300;line-height:0.98;letter-spacing:-0.02em;margin:24px 0 16px}
.pcta__title em{color:var(--accent);font-style:normal}
.pcta__lede{font-size:17px;color:var(--fg-muted);max-width:580px;margin:0 auto 36px;line-height:1.6}
.pcta__btns{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}
@media (max-width:600px){.pcta{padding:80px 20px}}
@media (max-width:600px){.pcta__btns{flex-direction:column;align-items:stretch}.pcta__btns .btn{justify-content:center;width:100%}}

/* ============ PREV/NEXT ============ */
.pn{padding:60px 40px;background:var(--bg-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.pn__inner{max-width:var(--container);margin:0 auto;display:grid;grid-template-columns:1fr 1fr;gap:24px}
.pn__cell{display:flex;flex-direction:column;gap:6px;padding:28px 32px;background:var(--bg-elev);border:1px solid var(--line);text-decoration:none;color:inherit;transition:all 280ms var(--ease-out);position:relative;overflow:hidden}
.pn__cell:hover{border-color:var(--accent);transform:translateY(-2px);box-shadow:0 20px 40px -20px rgba(0,0,0,0.12)}
.pn__cell--next{text-align:right;align-items:flex-end}
.pn__lbl{font-family:var(--font-mono);font-size:10px;letter-spacing:0.18em;text-transform:uppercase;color:var(--fg-muted);display:flex;align-items:center;gap:8px}
.pn__name{font-family:var(--font-display);font-size:24px;font-weight:400;margin:6px 0;letter-spacing:-0.01em}
.pn__arrow{color:var(--accent);font-family:var(--font-mono);font-size:18px;transition:transform 280ms}
.pn__cell--prev:hover .pn__arrow{transform:translateX(-4px)}
.pn__cell--next:hover .pn__arrow{transform:translateX(4px)}
@media (max-width:700px){.pn__inner{grid-template-columns:1fr}.pn__cell--next{text-align:left;align-items:flex-start}}
@media (max-width:600px){.pn{padding:40px 16px}.pn__cell{padding:20px}.pn__name{font-size:20px}}

/* ============ LIGHTBOX (BIM gallery) ============ */
.bimlb{position:fixed;inset:0;background:rgba(21,20,15,0.96);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);z-index:9000;display:none;align-items:center;justify-content:center;padding:80px;opacity:0;transition:opacity 280ms var(--ease-out)}
.bimlb.is-open{display:flex;opacity:1}
.bimlb__stage{position:relative;max-width:1400px;width:100%;max-height:100%;display:flex;flex-direction:column;gap:20px}
.bimlb__imgwrap{position:relative;flex:1;min-height:0;display:flex;align-items:center;justify-content:center;background:#FFFFFF;border:1px solid rgba(244,241,235,0.08)}
.bimlb__imgwrap img{max-width:100%;max-height:74vh;object-fit:contain;display:block}
.bimlb__crop{position:absolute;width:14px;height:14px;border-color:var(--accent);border-style:solid;border-width:0;pointer-events:none}
.bimlb__crop.tl{top:8px;left:8px;border-top-width:1.5px;border-left-width:1.5px}
.bimlb__crop.tr{top:8px;right:8px;border-top-width:1.5px;border-right-width:1.5px}
.bimlb__crop.bl{bottom:8px;left:8px;border-bottom-width:1.5px;border-left-width:1.5px}
.bimlb__crop.br{bottom:8px;right:8px;border-bottom-width:1.5px;border-right-width:1.5px}
.bimlb__info{display:flex;justify-content:space-between;align-items:end;gap:24px;color:#F4F1EB;flex-wrap:wrap}
.bimlb__info-left{display:flex;flex-direction:column;gap:6px;min-width:0;flex:1}
.bimlb__counter{font-family:var(--font-mono);font-size:11px;letter-spacing:0.18em;text-transform:uppercase;color:var(--accent)}
.bimlb__title{font-family:var(--font-display);font-size:24px;font-weight:400;line-height:1.15;letter-spacing:-0.01em;margin:0;color:#F4F1EB}
.bimlb__tag{font-family:var(--font-mono);font-size:11px;letter-spacing:0.18em;text-transform:uppercase;color:#A8A29A;margin-top:4px}
.bimlb__close,.bimlb__nav{position:absolute;background:rgba(244,241,235,0.06);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);border:1px solid rgba(244,241,235,0.18);color:#F4F1EB;width:48px;height:48px;border-radius:50%;display:grid;place-items:center;cursor:pointer;transition:background 200ms,border-color 200ms;z-index:2}
.bimlb__close:hover,.bimlb__nav:hover{background:var(--accent);border-color:var(--accent)}
.bimlb__close{top:24px;right:24px;font-family:var(--font-mono);font-size:20px;line-height:1}
.bimlb__nav{top:50%;transform:translateY(-50%);font-family:var(--font-mono);font-size:22px}
.bimlb__nav--prev{left:24px}
.bimlb__nav--next{right:24px}
@media (max-width:780px){.bimlb{padding:60px 16px 16px}.bimlb__close{top:14px;right:14px;width:40px;height:40px}.bimlb__nav{width:40px;height:40px}.bimlb__nav--prev{left:8px}.bimlb__nav--next{right:8px}.bimlb__info{flex-direction:column;align-items:flex-start}}
body.has-bimlb{overflow:hidden}