/* Portfolio design de Cédric de La Chaise : univers InStudy V3 (cadre encre, panneaux marbre arrondis,
   Hanken Grotesk + Newsreader italique ardoise, méta en mono). Port de instudy-brand.css + portfolio.css,
   toutes les couleurs passent par tokens.css (généré depuis system/tokens.json). */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:16px;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--color-marble);color:var(--color-ink);font:400 16px/1.6 var(--font-sans);-webkit-font-smoothing:antialiased}
body.pf{background:var(--color-ink)}
h1,h2,h3{font-family:var(--font-sans);font-weight:500;letter-spacing:-.035em;line-height:1.04;text-wrap:balance;margin:0}
p{margin:0}img{max-width:100%;display:block}a{color:inherit}
.accent{font-family:var(--font-display);font-style:italic;font-weight:400;letter-spacing:-.01em;color:var(--color-accent)}
.accent-light{font-family:var(--font-display);font-style:italic;font-weight:400;letter-spacing:-.01em;color:var(--color-accent-light)}
.eyebrow{font:400 12px/1.5 var(--font-mono);letter-spacing:.08em;text-transform:uppercase;color:var(--color-accent)}
.btn{display:inline-flex;align-items:center;gap:8px;font:500 15px/1 var(--font-sans);padding:16px 22px;border-radius:var(--radius-pill);text-decoration:none;border:0;cursor:pointer;transition:background var(--motion-fast)}
.btn-primary{background:var(--color-ink);color:var(--color-marble)}
.btn-primary:hover{background:var(--color-accent-ink)}
.btn-ghost{background:transparent;color:var(--color-ink);box-shadow:inset 0 0 0 1.5px var(--color-ink)}
.btn-ghost-dark{background:transparent;color:var(--color-marble);box-shadow:inset 0 0 0 1.5px var(--color-marble)}
a:focus-visible,button:focus-visible{outline:3px solid var(--color-accent);outline-offset:4px}
.tag{display:inline-block;font:400 11px/1 var(--font-mono);letter-spacing:.08em;text-transform:uppercase;padding:8px 11px;margin:0 6px 6px 0;border-radius:var(--radius-pill);box-shadow:inset 0 0 0 1px var(--color-line);color:var(--color-text-2)}

/* En-tête dans le hero */
.brand-header{display:flex;justify-content:space-between;align-items:center;gap:24px;padding:20px 16px}
@media(min-width:800px){.brand-header{padding:22px 32px}}
.brand-logo{font:500 21px/1 var(--font-sans);letter-spacing:-.02em;text-decoration:none;color:var(--color-ink);white-space:nowrap}
.brand-logo i{font:italic 400 23px/1 var(--font-display);letter-spacing:0}
.brand-logo .by{font:400 13px/1 var(--font-sans);letter-spacing:0;color:var(--color-muted);margin-left:12px;padding-left:12px;border-left:1px solid var(--color-line);vertical-align:3px}
@media(max-width:480px){.brand-logo .by{display:none}}
.brand-nav{display:flex;gap:32px;list-style:none;margin:0;padding:0;font-size:15px}
.brand-nav a{text-decoration:none}
.brand-nav a:hover{color:var(--color-accent)}
@media(max-width:620px){.brand-nav{gap:16px;font-size:14px}.nav-long{display:none}}

/* Barre collante, apparaît après le hero */
.sticky-bar{position:fixed;top:12px;left:50%;z-index:90;width:min(820px,calc(100% - 24px));transform:translate(-50%,calc(-100% - 24px));display:flex;align-items:center;justify-content:space-between;gap:20px;padding:7px 7px 7px 20px;border-radius:var(--radius-pill);background:var(--color-glass);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);box-shadow:0 0 0 1px var(--color-line),0 10px 30px var(--color-shadow-soft);visibility:hidden;opacity:0;transition:transform .35s ease,opacity .25s ease,visibility 0s linear .35s}
.sticky-bar.is-on{transform:translate(-50%,0);visibility:visible;opacity:1;transition:transform .35s ease,opacity .25s ease}
.sticky-bar .brand-logo{font-size:17px}.sticky-bar .brand-logo i{font-size:19px}.sticky-bar .brand-logo .by{display:none}
.sticky-nav{display:flex;gap:24px;font-size:14px}
.sticky-nav a{text-decoration:none;color:var(--color-ink)}
.sticky-nav a:hover{color:var(--color-accent)}
.sticky-bar .btn{padding:10px 16px;font-size:14px}
@media(max-width:700px){.sticky-nav{display:none}}

/* Panneaux */
.panel{margin:10px 16px;border-radius:18px;background:var(--color-marble);padding:96px 56px}
.panel.stone{background:var(--color-stone)}
.section-title{font-size:clamp(36px,4.4vw,64px);margin:18px 0 56px;max-width:20ch}
@media(max-width:800px){.panel{padding:56px 20px}}

/* Hero */
.hero{position:relative;margin:16px 16px 0;border-radius:18px;min-height:calc(100svh - 16px);display:flex;flex-direction:column;overflow:hidden;background:radial-gradient(90% 70% at 50% 30%,var(--color-hero-top) 0%,var(--color-hero-mid) 45%,var(--color-hero-bottom) 100%),var(--color-hero-mid)}
.hero.case{min-height:calc(78vh - 16px)}
.hero-body{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:40px 16px 140px;text-align:center}
.kicker{display:inline-flex;align-items:center;gap:10px;padding:8px 16px;border-radius:var(--radius-pill);background:var(--color-white-70);box-shadow:inset 0 0 0 1px var(--color-accent-20);font-size:14px;line-height:1.3;color:var(--color-text-strong);text-align:left}
.kicker b{font:400 11px/1 var(--font-mono);letter-spacing:.08em;background:var(--color-accent);color:var(--color-white);padding:5px 8px;border-radius:var(--radius-pill);flex:none}
.hero h1{font-size:clamp(40px,5.4vw,88px);font-weight:500;line-height:.98;letter-spacing:-.045em;margin-top:28px;max-width:18ch;color:var(--color-ink)}
.hero h1 .accent{letter-spacing:-.02em}
.hero .value{max-width:60ch;margin-top:32px;font:400 clamp(16px,1.25vw,19px)/1.6 var(--font-sans);color:var(--color-text-2)}
.hero .value b{font-weight:500;color:var(--color-ink)}
.hero-photo{width:96px;height:96px;border-radius:var(--radius-pill);object-fit:cover;filter:grayscale(1);margin-bottom:24px;box-shadow:0 0 0 4px var(--color-white-70)}
.meta{position:absolute;left:32px;bottom:32px;z-index:2;margin:0;padding:0;list-style:none;font:400 12px/2 var(--font-mono);letter-spacing:.04em;text-transform:uppercase;color:var(--color-text-2)}
.meta li::before{content:"● ";color:var(--color-accent)}
.hero-actions{position:absolute;right:32px;bottom:32px;z-index:2;display:flex;gap:10px;flex-wrap:wrap;justify-content:flex-end}
.back{position:absolute;left:32px;top:84px;z-index:2;font:400 12px/1 var(--font-mono);letter-spacing:.06em;text-transform:uppercase;text-decoration:none;color:var(--color-text-2)}
.back:hover{color:var(--color-accent)}
@media(max-width:800px){.hero{min-height:0}.hero.case{min-height:0}.hero-body{padding:56px 8px 36px}.meta,.hero-actions,.back{position:static}.back{display:block;padding:0 16px;margin-top:8px}.meta{padding:0 16px 16px}.hero-actions{padding:0 16px 24px;justify-content:flex-start}}

/* Bande de chiffres */
.proofs{margin:10px 16px;border-radius:18px;background:var(--color-ink-2);border:1px solid var(--color-line-dark);display:grid;grid-template-columns:repeat(4,1fr);color:var(--color-marble)}
.proof{padding:48px 32px 44px;display:flex;flex-direction:column;gap:12px}
.proof+.proof{border-left:1px solid var(--color-line-dark)}
.proof .n{font:500 clamp(40px,4.4vw,60px)/1 var(--font-sans);letter-spacing:-.04em;font-variant-numeric:tabular-nums}
.proof .l{font-size:16px;line-height:1.45;color:var(--color-marble-88);max-width:26ch}
@media(max-width:900px){.proofs{grid-template-columns:1fr 1fr}.proof{padding:32px 20px}.proof+.proof{border-left:0}.proof:nth-child(even){border-left:1px solid var(--color-line-dark)}.proof:nth-child(n+3){border-top:1px solid var(--color-line-dark)}}

/* Piliers */
.pillars{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.pillar{background:var(--color-marble);border-radius:14px;padding:30px 26px 26px;display:flex;flex-direction:column;gap:16px}
.pillar .n{font:400 12px/1 var(--font-mono);color:var(--color-accent);letter-spacing:.08em}
.pillar h3{font-size:24px;line-height:1.12}
.pillar p{font-size:15px;line-height:1.6;color:var(--color-text-2)}
.pillar .pv{margin-top:auto;padding-top:16px;border-top:1px solid var(--color-line);font-size:15px;line-height:1.4;text-decoration:none;color:var(--color-ink)}
.pillar .pv b{display:block;font:400 11px/1.6 var(--font-mono);letter-spacing:.08em;text-transform:uppercase;color:var(--color-muted);margin-bottom:4px}
.pillar .pv:hover{color:var(--color-accent)}
@media(max-width:1100px){.pillars{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.pillars{grid-template-columns:1fr}}

/* Tuiles de cas teintées */
.decisions-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.decision{--fg:var(--color-ink);--soft:var(--color-soft);--hi:var(--color-accent);position:relative;overflow:hidden;display:flex;flex-direction:column;min-height:400px;border-radius:18px;padding:40px 40px 34px;text-decoration:none;color:var(--fg);transition:transform .2s ease,box-shadow .2s ease;isolation:isolate}
.decision::before{content:attr(data-n);position:absolute;right:20px;top:-34px;z-index:-1;font:300 220px/1 var(--font-display);letter-spacing:-.02em;color:currentColor;opacity:.09}
.decision:hover{transform:translateY(-3px);box-shadow:0 18px 40px var(--color-shadow)}
.d-slate{background:linear-gradient(140deg,var(--color-slate-a) 0%,var(--color-slate-b) 100%);--fg:var(--color-white);--soft:var(--color-on-slate);--hi:var(--color-white)}
.d-mist{background:radial-gradient(120% 90% at 80% 0%,var(--color-mist-a) 0%,var(--color-mist-b) 100%)}
.d-night{background:radial-gradient(90% 80% at 100% 100%,var(--color-night-glow),transparent 60%),var(--color-night);--fg:var(--color-marble);--soft:var(--color-on-night);--hi:var(--color-accent-light)}
.d-stone{background:linear-gradient(160deg,var(--color-stone-a) 0%,var(--color-stone-b) 100%)}
.decision .goal{font:500 12px/1 var(--font-mono);letter-spacing:.1em;text-transform:uppercase;color:var(--hi)}
.decision h3{font-size:clamp(24px,2.2vw,32px);line-height:1.12;margin:20px 0 18px;max-width:20ch;color:var(--fg)}
.decision .fig{font:500 44px/1 var(--font-sans);letter-spacing:-.04em;color:var(--fg)}
.decision .fig small{display:block;margin-top:8px;font:400 16px/1.45 var(--font-sans);letter-spacing:0;color:var(--soft);max-width:36ch}
.decision small.how{display:block;margin:18px 0 30px;font:400 12px/1.5 var(--font-mono);color:var(--soft)}
.proof-link{margin-top:auto;display:flex;align-items:center;gap:12px;padding-top:18px;border-top:1px solid color-mix(in srgb,currentColor 22%,transparent);font-size:16px;line-height:1.35}
.proof-link .pk{flex:none;font:400 11px/1 var(--font-mono);letter-spacing:.08em;text-transform:uppercase;color:var(--soft)}
.arrow{margin-left:auto;flex:none;width:34px;height:34px;border-radius:var(--radius-pill);display:grid;place-items:center;box-shadow:inset 0 0 0 1px color-mix(in srgb,currentColor 35%,transparent);transition:transform .2s ease,background .2s ease}
.decision:hover .arrow,.more-row a:hover .arrow{transform:translateX(4px);background:color-mix(in srgb,currentColor 12%,transparent)}
@media(max-width:800px){.decisions-grid{grid-template-columns:1fr}.decision{min-height:0;padding:30px 22px 24px}.decision::before{font-size:150px;top:-20px}}

/* Autres cas : liste */
.more{margin-top:72px}
.more-list{list-style:none;padding:0;margin:18px 0 0}
.more-row a{display:flex;align-items:center;gap:24px;padding:22px 0;border-top:1px solid var(--color-line);text-decoration:none}
.more-row .pk{flex:0 0 180px;font:400 12px/1.4 var(--font-mono);letter-spacing:.06em;text-transform:uppercase;color:var(--color-muted)}
.more-row strong{font:500 clamp(19px,1.8vw,24px)/1.25 var(--font-sans);letter-spacing:-.02em}
.more-row a:hover strong{color:var(--color-accent)}
@media(max-width:700px){.more-row a{flex-wrap:wrap;gap:8px}.more-row .pk{flex-basis:100%}.more-row .arrow{display:none}}

/* Recommandations */
.cards2{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.tcard{margin:0;background:var(--color-marble);border-radius:14px;padding:36px 32px;display:flex;flex-direction:column;gap:24px}
.tcard blockquote{margin:0;font:italic 400 21px/1.5 var(--font-display);color:var(--color-text-strong)}
.tcard figcaption{margin-top:auto;padding-top:16px;border-top:1px solid var(--color-line);font-size:15px;color:var(--color-muted)}
.tcard figcaption b{display:block;font-weight:500;color:var(--color-ink)}
.tcard figcaption small{display:block;margin-top:4px;font:400 11px/1.5 var(--font-mono);letter-spacing:.08em;text-transform:uppercase;color:var(--color-muted)}
@media(max-width:800px){.cards2{grid-template-columns:1fr}}

/* Parcours */
.timeline{list-style:none;padding:0;margin:0;max-width:980px}
.step{display:grid;grid-template-columns:210px 1fr;gap:6px 32px;padding:26px 0;border-top:1px solid var(--color-line)}
.step .when{font:400 12px/1.9 var(--font-mono);letter-spacing:.04em;text-transform:uppercase;color:var(--color-accent)}
.step h3{font-size:clamp(22px,2.2vw,28px)}
.step p{margin-top:8px;font-size:17px;line-height:1.6;color:var(--color-text-2);max-width:62ch}
.tools{margin-top:48px}
@media(max-width:800px){.step{grid-template-columns:1fr}}

/* Contact (section sombre) */
.about{background:var(--color-ink);color:var(--color-marble);padding:120px 32px;display:grid;grid-template-columns:280px 1fr;gap:64px;max-width:1240px;margin:0 auto}
.about img{width:280px;aspect-ratio:1;align-self:start;object-fit:cover;border-radius:16px;filter:grayscale(1)}
.about .eyebrow{color:var(--color-accent-light)}
.about h2{font-size:clamp(36px,4.4vw,60px);margin:14px 0 24px}
.about p{font-size:19px;line-height:1.6;max-width:58ch;color:var(--color-marble-88)}
.formats{list-style:none;padding:0;margin:32px 0 0;display:grid;gap:0;max-width:62ch}
.formats li{padding:16px 0;border-top:1px solid var(--color-line-dark);font-size:16px;line-height:1.5;color:var(--color-marble-88)}
.formats b{display:block;font-weight:500;color:var(--color-marble)}
.about .actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:36px}
.about .btn-primary{background:var(--color-marble);color:var(--color-ink)}
.about .btn-primary:hover{background:var(--color-white)}
.contact-lines{margin-top:28px;font:400 13px/2 var(--font-mono);color:var(--color-muted-dark)}
.contact-lines a{color:var(--color-marble)}
@media(max-width:800px){.about{grid-template-columns:1fr;padding:72px 20px}.about img{width:140px}}

/* Pied de page */
.brand-footer{background:var(--color-ink);color:var(--color-marble);padding:48px 32px;display:flex;flex-wrap:wrap;justify-content:space-between;gap:24px;font-size:14px}
.brand-footer .brand-logo{color:var(--color-marble)}
.brand-footer .brand-logo .by{display:none}
.brand-footer small{font:400 12px/1.6 var(--font-mono);color:var(--color-muted-dark);display:block;margin-top:8px}
.brand-footer a{color:var(--color-marble)}

/* Page de cas */
.cover-panel{margin:10px 16px;border-radius:18px;overflow:hidden;background:var(--color-ink-2)}
.cover-panel img{width:100%;height:auto}
.facts-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));margin:10px 16px;border-radius:18px;background:var(--color-ink-2);border:1px solid var(--color-line-dark);color:var(--color-marble)}
.facts-row div{padding:28px 26px;border-left:1px solid var(--color-line-dark)}
.facts-row dt{font:400 11px/1.4 var(--font-mono);letter-spacing:.08em;text-transform:uppercase;color:var(--color-accent-light)}
.facts-row dd{margin:8px 0 0;font-size:15px;line-height:1.5;color:var(--color-marble-88)}
.objective{font:500 clamp(24px,2.6vw,36px)/1.3 var(--font-sans);letter-spacing:-.025em;max-width:36ch;margin-top:24px}
.insight-list{display:grid;gap:10px}
.insight{display:grid;grid-template-columns:120px 1fr;gap:40px;background:var(--color-marble);border-radius:14px;padding:40px 40px 44px}
.insight .n{font:400 12px/1 var(--font-mono);letter-spacing:.08em;color:var(--color-accent)}
.insight h3{font-size:clamp(24px,2.2vw,30px);line-height:1.15}
.insight .txt>p{margin-top:12px;font-size:17px;line-height:1.6;color:var(--color-text-2)}
.insight blockquote{margin:24px 0 0;padding-left:18px;border-left:2px solid var(--color-accent-light);font:italic 400 22px/1.45 var(--font-display);color:var(--color-text-strong)}
.insight cite{display:block;margin-top:6px;font:normal 400 11px/1.5 var(--font-mono);letter-spacing:.08em;text-transform:uppercase;color:var(--color-muted)}
.panel:not(.stone) .insight{background:var(--color-stone)}
.decision-card{grid-template-columns:1fr 1.2fr;align-items:start}
.decision-card h3{margin-top:16px}
.tradeoff{display:grid;grid-template-columns:max-content 1fr;gap:10px 20px;margin:24px 0 0}
.tradeoff dt{font:400 11px/1.9 var(--font-mono);letter-spacing:.08em;text-transform:uppercase;color:var(--color-muted)}
.tradeoff dd{margin:0;font-size:16px;line-height:1.5;color:var(--color-text-2)}
.shot img{border-radius:12px}
.ba{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.ba figcaption{margin-top:10px;font:400 12px/1.5 var(--font-mono);text-transform:uppercase;letter-spacing:.06em;color:var(--color-muted)}
.slot{display:flex;align-items:center;justify-content:center;aspect-ratio:16/10;border-radius:12px;box-shadow:inset 0 0 0 1px var(--color-line);background:var(--color-white-55);font:400 12px/1.4 var(--font-mono);text-transform:uppercase;letter-spacing:.06em;color:var(--color-muted);text-align:center;padding:16px}
.outcome-wrap{margin:10px 16px;border-radius:18px;padding:16vh 32px 14vh;background:radial-gradient(40% 40% at 10% 100%,var(--color-night-glow),transparent 70%),var(--color-ink-2);color:var(--color-marble)}
.outcome-wrap .inner{max-width:1100px;margin:0 auto}
.outcome-wrap .eyebrow{color:var(--color-accent-light)}
.outcome{margin-top:24px;max-width:26ch;font:500 clamp(32px,4.2vw,60px)/1.08 var(--font-sans);letter-spacing:-.04em}
.next-wrap{margin:10px 16px 16px}
.next{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.next a{background:var(--color-marble);border-radius:18px;padding:40px 40px;text-decoration:none;display:grid;gap:12px;transition:transform .2s ease,box-shadow .2s ease}
.next a:hover{transform:translateY(-3px);box-shadow:0 18px 40px var(--color-shadow)}
.next span{font:400 11px/1 var(--font-mono);letter-spacing:.08em;text-transform:uppercase;color:var(--color-accent)}
.next strong{font:500 26px/1.2 var(--font-sans);letter-spacing:-.02em}
@media(max-width:800px){.insight,.decision-card{grid-template-columns:1fr;gap:16px;padding:28px 22px}.ba,.next{grid-template-columns:1fr}.facts-row div{border-left:0;border-top:1px solid var(--color-line-dark)}}

/* Page /system */
.swatches,.spaces{list-style:none;padding:0;margin:24px 0 0;display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:16px}
.sw{display:block;height:64px;border-radius:10px;box-shadow:inset 0 0 0 1px var(--color-line);margin-bottom:8px}
.sp{display:block;height:14px;background:var(--color-accent);border-radius:2px;margin-bottom:8px}
.swatches code,.spaces code{font:400 12px/1.4 var(--font-mono);color:var(--color-text-2)}
.specimens{display:grid;gap:40px;margin-top:24px}
.ai{white-space:pre-wrap;background:var(--color-ink);color:var(--color-marble);padding:28px;border-radius:14px;font:400 13px/1.7 var(--font-mono);overflow-x:auto;margin:24px 0 0}
.decision-card:not(:has(.shot)){grid-template-columns:1fr}
.ba img{border-radius:12px}
/* Étapes research puis design (le cheminement du cas) */
.process{list-style:none;padding:0;margin:0;display:grid;gap:0}
.pstep{display:grid;grid-template-columns:72px 1fr;gap:8px 32px;padding:36px 0;border-top:1px solid var(--color-line)}
.pstep .n{font:400 12px/2 var(--font-mono);letter-spacing:.08em;color:var(--color-accent)}
.pstep h3{font-size:clamp(22px,2.2vw,30px);line-height:1.15}
.pstep p{margin-top:10px;font-size:17px;line-height:1.6;color:var(--color-text-2);max-width:62ch}
.pshot{grid-column:2;margin:24px 0 0}
.pshot img{width:100%;border-radius:14px;box-shadow:0 0 0 1px var(--color-line),0 18px 40px var(--color-shadow-soft)}
@media(min-width:1000px){.pstep:has(.pshot){grid-template-columns:72px minmax(0,.8fr) minmax(0,1.2fr)}.pstep:has(.pshot) .pshot{grid-column:3;grid-row:1;margin:0}}
@media(max-width:700px){.pstep{grid-template-columns:1fr}.pshot{grid-column:1}}