/* V39: proof-led editorial rhythm; V38 coded interface gallery remains intact. */
.portfolio-v39{--v-soft:#f4f6fb;--v-line:#d9dfe8}
.portfolio-v39 main{overflow:visible}
.portfolio-v39 .v37-hero{padding-bottom:clamp(2rem,4vw,4rem)}
.portfolio-v39 .v37-hero h1{max-width:12.5ch}
.v39-proof-jump{display:grid;grid-template-columns:minmax(210px,.55fr) minmax(0,1.45fr);gap:clamp(1.5rem,5vw,5rem);align-items:start;padding:1.7rem 0 clamp(2.5rem,5vw,5rem);border-top:1px solid var(--v-line)}
.v39-proof-jump,.v39-case-evidence{scroll-margin-top:5rem}
.v39-proof-jump .v37-eyebrow{margin-bottom:.7rem}
.v39-proof-jump h2{font:400 clamp(1.55rem,2.6vw,2.8rem)/1.15 var(--v-serif);letter-spacing:-.045em;margin:0;max-width:15ch}
.v39-proof-links{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.v39-proof-links a{position:relative;display:flex;flex-direction:column;gap:.65rem;min-height:132px;padding:1.25rem 3rem 1.25rem 1.35rem;border:1px solid var(--v-line);background:#f7f9ff;color:var(--v-ink);text-decoration:none;transition:border-color .18s,background-color .18s,transform .18s}
.v39-proof-links a:hover{background:#edf2ff;border-color:#9eafff;transform:translateY(-2px)}
.v39-proof-links a>span:first-child{color:var(--v-blue);font-size:.75rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase}
.v39-proof-links strong{font:400 clamp(1.15rem,1.5vw,1.5rem)/1.28 var(--v-serif);letter-spacing:-.02em}
.v39-arrow{position:absolute;top:1.1rem;right:1.25rem;color:var(--v-blue);font-size:1.25rem}
.portfolio-v39 .interface-history{border-top:1px solid var(--v-line);background:#f7f9ff;padding-top:clamp(2.5rem,5vw,5rem)}
.portfolio-v39 .history-intro .lead{max-width:56ch}
.portfolio-v39 .history-intro-bottom{border-color:var(--v-line)}
.portfolio-v39 .history-sticky{width:calc(100% - 48px);max-width:none}
.portfolio-v39 .history-stage{border-radius:6px}
.portfolio-v39 .era-selector button{min-height:62px;padding-left:12px;cursor:pointer}
.portfolio-v39 .era-selector button:hover{color:var(--v-blue);border-left-color:var(--v-blue)}
.v39-era-count{font-weight:700;color:var(--v-blue);font-variant-numeric:tabular-nums;letter-spacing:.1em;margin:0 0 1rem}
.portfolio-v39 .history-end{padding-bottom:clamp(2rem,4vw,4rem)}
.portfolio-v39 .history-end>p:first-child{margin-bottom:.5rem}
.portfolio-v39 .history-end .v39-gallery-disclosure{font:400 .82rem/1.55 Arial,sans-serif;color:var(--v-muted);margin-top:1.15rem;max-width:80ch}
.portfolio-v39 .history-end .v37-link{margin-top:.2rem}
.portfolio-v39 .v37-project:first-child{background:#f4f7ff}
.portfolio-v39 .v37-project:first-child .v37-project-media{background:#eaf0ff}
.portfolio-v39 .v37-project:nth-child(2) .v37-project-media{background:#eef2f8}
.portfolio-v39 .v37-project:nth-child(3){align-self:start;padding:clamp(1.4rem,2.5vw,2.8rem);border:1px solid var(--v-line);background:#f7f9ff}
.portfolio-v39 .v37-project:nth-child(3) .v37-project-copy{padding:0}
.portfolio-v39 .v37-project:nth-child(3) h3{font-size:clamp(2.1rem,3vw,3.5rem)}
.portfolio-v39 .v37-project-caption{font-size:.8rem}
.v39-method{padding-block:clamp(4rem,7vw,8rem);background:#172947;color:#fff}
.v39-method-grid{display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);gap:clamp(2rem,7vw,8rem)}
.v39-method .v37-eyebrow{color:#b9c9ff}
.v39-method h2{font:400 clamp(2.7rem,5vw,5.6rem)/1.06 var(--v-serif);letter-spacing:-.055em;margin:0 0 1.5rem;max-width:13ch}
.v39-method p{line-height:1.65;color:#e0e7f5;max-width:55ch}
.v39-method .v37-link{color:#fff}
.v39-method ol{list-style:none;margin:0;padding:0;counter-reset:step}
.v39-method li{counter-increment:step;display:grid;grid-template-columns:9rem 1fr;gap:1rem;border-top:1px solid #8da1c455;padding:1.1rem 0}
.v39-method li>span{font-weight:700;color:#fff}
.v39-method li>span::before{content:'0' counter(step) '  ';font-size:.72rem;color:#aec0f4}
.v39-method li p{margin:0}
.portfolio-v39 .v37-experience{background:#f3f6fc}
.portfolio-v39 .v37-experience h2+p{color:var(--v-muted);line-height:1.6;max-width:28ch}
.portfolio-v39 .v37-experience li{border-color:#cbd4e1}
.portfolio-v39 .v37-case-hero{background:#f3f6fc}
.v39-case-hero h1{max-width:18ch;font-size:clamp(3rem,5.5vw,6rem)}
.v39-case-body{display:grid;grid-template-columns:minmax(210px,.35fr) minmax(0,.65fr);gap:clamp(2rem,6vw,7rem);padding-block:clamp(2.5rem,5vw,5rem)}
.v39-case-body .v37-case-facts{position:static;top:auto}
.v39-case-snapshot h2{font:400 clamp(2.3rem,3.6vw,4rem)/1.1 var(--v-serif);letter-spacing:-.045em;margin:0 0 1.3rem}
.v39-case-snapshot dl{margin:0}
.v39-case-snapshot dl>div{display:grid;grid-template-columns:11rem 1fr;gap:1rem;border-top:1px solid var(--v-line);padding:1rem 0}
.v39-case-snapshot dt{font-weight:700;color:var(--v-ink)}
.v39-case-snapshot dd{margin:0;color:var(--v-muted);line-height:1.6;max-width:65ch}
.v39-case-evidence{padding-block:clamp(3.5rem,6vw,7rem);background:#f3f6fc}
.v39-case-evidence h2{font:400 clamp(2.8rem,5vw,5.5rem)/1.08 var(--v-serif);letter-spacing:-.055em;margin:0 0 1rem;max-width:16ch}
.v39-evidence-intro{font-size:clamp(1.05rem,1.4vw,1.22rem);line-height:1.65;color:var(--v-muted);max-width:66ch}
.v39-open-hint{font-size:.85rem;color:var(--v-blue);font-weight:700;margin:2rem 0 1rem}
.v39-artifact-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(1rem,3vw,3rem);align-items:start}
.v39-artifact-grid figure{margin:0;min-width:0}
.v39-artifact-grid figure a{display:block;min-height:44px;background:white;border:1px solid var(--v-line);padding:clamp(.5rem,2vw,1.5rem)}
.v39-artifact-grid figure a:hover{border-color:var(--v-blue)}
.v39-artifact-grid figure a::after{content:attr(data-open-label);display:block;width:max-content;max-width:100%;min-height:44px;margin:.6rem 0 0;color:var(--v-blue);font-size:.9rem;font-weight:700;line-height:44px}
.v39-artifact-grid img{display:block;width:100%;height:auto;max-height:700px;object-fit:contain;margin:auto}
.v39-artifact-grid figcaption{font-size:.83rem;line-height:1.5;color:var(--v-muted);margin-top:.6rem}
.v39-artifact-grid--cetelem{display:block}
.v39-artifact-grid--cetelem>figure{max-width:640px}
.v39-artifact-detail{margin-top:1.25rem;max-width:680px}
.v39-artifact-detail summary{display:flex;align-items:center;min-height:52px;padding:.8rem 1rem;border:1px solid #b9c7e6;background:#fff;color:var(--v-blue);font-weight:700;cursor:pointer;list-style:none}
.v39-artifact-detail summary::-webkit-details-marker{display:none}
.v39-artifact-detail summary::after{content:'+';font-size:1.4rem;margin-left:auto;padding-left:1rem}
.v39-artifact-detail[open] summary::after{content:'−'}
.v39-artifact-detail figure{margin:1rem 0 0}
.v39-artifact-detail img{max-height:none}
.v39-annotations{list-style:none;display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin:clamp(2rem,4vw,4rem) 0 0;padding:0}
.v39-annotations li{border-top:2px solid var(--v-blue);padding-top:.85rem}
.v39-annotations strong{display:block;font-size:.78rem;color:var(--v-blue);text-transform:uppercase;letter-spacing:.06em;margin-bottom:.4rem}
.v39-annotations span{display:block;line-height:1.6;color:var(--v-ink)}
.v39-case-close{display:grid;grid-template-columns:1fr 1fr;gap:clamp(2rem,5vw,6rem);padding-block:clamp(3rem,6vw,6rem)}
.v39-case-close h2{font:400 clamp(2rem,3vw,3.1rem)/1.15 var(--v-serif);letter-spacing:-.04em;margin:0 0 .8rem}
.v39-case-close p{line-height:1.7;color:var(--v-muted);max-width:62ch}
.portfolio-v39 .v37-next{background:#f3f6fc}
.portfolio-v39 .language-switch a{min-width:44px;min-height:44px;display:inline-flex;align-items:center;justify-content:center}
.portfolio-v39 .site-footer .footer-links a,.portfolio-v39 .site-footer .footer-links button{min-height:44px;display:inline-flex;align-items:center;justify-content:center}
.portfolio-v39 .site-footer .footer-links{row-gap:.3rem}
@media(max-width:900px){.v39-proof-jump{grid-template-columns:1fr}.v39-proof-jump h2{max-width:none}.v39-method-grid{grid-template-columns:1fr}.v39-method h2{max-width:18ch}}
@media(max-width:700px){.portfolio-v39 .v37-hero{padding-bottom:2.2rem}.portfolio-v39 .v37-hero h1{font-size:clamp(3rem,11vw,5rem)}.v39-proof-links{grid-template-columns:1fr}.v39-proof-links a{min-height:110px}.portfolio-v39 .history-sticky{width:calc(100% - 32px)}.portfolio-v39 .history-comment{order:0;margin:0 0 1rem;display:block;min-height:0}.portfolio-v39 .history-comment h3{margin:.25rem 0}.portfolio-v39 .story-static-hint{display:block!important;margin:.5rem 0 0}.portfolio-v39 .history-stage{order:1}.portfolio-v39 .era-selector{order:2}.portfolio-v39 .history-end{padding-top:1rem}.portfolio-v39 .v37-work{padding-top:3rem}.v39-method li{grid-template-columns:1fr;gap:.25rem}.v39-case-body{display:block}.v39-case-body .v37-case-facts{display:grid;grid-template-columns:1fr 1fr;gap:0 1rem;margin-bottom:2rem}.v39-case-snapshot dl>div{grid-template-columns:1fr;gap:.3rem}.v39-artifact-grid{grid-template-columns:1fr}.v39-artifact-grid img{max-height:none}.v39-annotations{grid-template-columns:1fr}.v39-case-close{grid-template-columns:1fr}}
@media(max-width:380px){.v39-case-body .v37-case-facts{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){.v39-proof-links a{transition:none}.portfolio-v39 .history-stage,.portfolio-v39 .era-component{transition:none}}
.motion-reduced .v39-proof-links a{transition:none}