/* ══════════════════════════════════════════════════════════════
   style.css
   1. Tokens · 2. Base · 3. Typographie · 4. Nav · 5. Hero
   6. Accroche · 7. Lab · 8. Projets · 9. Contact · 10. Motion
   ══════════════════════════════════════════════════════════════ */

/* ─── 1. Tokens ─────────────────────────────────────────────── */
:root{
  --ink:      #000000;
  --paper:    #f5f5f7;
  --graphite: #1d1d1f;
  --slate:    #424245;
  --smoke:    #86868b;
  --signal:   #0a84ff;
  --online:   #30d158;

  --ease:    cubic-bezier(.28,.11,.32,1);
  --gutter:  clamp(20px, 5vw, 80px);
  --measure: 62ch;

  --sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: "SF Mono", "JetBrains Mono", ui-monospace, Menlo, Consolas, monospace;
}

/* ─── 2. Base ───────────────────────────────────────────────── */
*,*::before,*::after{ box-sizing:border-box; }

html{ scroll-behavior:smooth; -webkit-text-size-adjust:100%; }

body{
  margin:0;
  background:var(--ink);
  color:var(--paper);
  font-family:var(--sans);
  line-height:1.5;
  letter-spacing:-.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

::selection{ background:var(--signal); color:#fff; }

:focus-visible{
  outline:2px solid var(--signal);
  outline-offset:4px;
  border-radius:2px;
}

.skip{
  position:absolute; left:-9999px; top:0; z-index:200;
  padding:12px 20px; background:var(--paper); color:var(--ink);
  font-size:.9rem; text-decoration:none;
}
.skip:focus{ left:var(--gutter); top:12px; }

/* ─── 3. Typographie ────────────────────────────────────────── */
.t-mega{
  font-size:clamp(3.5rem, 15vw, 12rem);
  line-height:.88; letter-spacing:-.045em; font-weight:700; margin:0;
}
.t-statement{
  font-size:clamp(1.75rem, 5.2vw, 4rem);
  line-height:1.12; letter-spacing:-.03em; font-weight:600;
  margin:0; max-width:18ch;
}
.t-title{
  font-size:clamp(1.6rem, 3.4vw, 2.75rem);
  line-height:1.1; letter-spacing:-.025em; font-weight:600; margin:0;
}
.t-body{
  font-size:clamp(1.02rem, 1.35vw, 1.2rem);
  line-height:1.6; color:var(--smoke); max-width:var(--measure); margin:0;
}
.t-data{
  font-family:var(--mono); font-size:.74rem;
  letter-spacing:.02em; color:var(--smoke);
}

/* ─── 4. Nav ────────────────────────────────────────────────── */
.nav{
  position:fixed; inset:0 0 auto 0; z-index:100;
  height:52px; display:flex; align-items:center; gap:28px;
  padding:0 var(--gutter);
  background:rgba(0,0,0,.62);
  backdrop-filter:saturate(180%) blur(20px);
  -webkit-backdrop-filter:saturate(180%) blur(20px);
  border-bottom:1px solid rgba(255,255,255,.08);
  transform:translateY(-100%);
  transition:transform .5s var(--ease), background .4s linear, border-color .4s linear;
}
.nav[data-visible="true"]{ transform:none; }
.nav[data-theme="light"]{
  background:rgba(245,245,247,.72);
  border-bottom-color:rgba(0,0,0,.08);
}
.nav[data-theme="light"] .nav__link{ color:var(--graphite); }
.nav[data-theme="light"] .nav__mark{ color:var(--ink); }

.nav__mark{
  margin-right:auto; font-weight:600; font-size:.94rem;
  letter-spacing:-.01em; color:var(--paper); text-decoration:none;
  transition:color .4s linear;
}
.nav__link{
  font-size:.8rem; color:var(--smoke); text-decoration:none;
  transition:color .25s var(--ease);
}
.nav__link:hover{ color:var(--signal); }
@media (max-width:640px){ .nav__link[data-optional]{ display:none; } }

/* ─── 5. Hero ───────────────────────────────────────────────── */
.hero{ height:170vh; position:relative; }

.hero__pin{
  position:sticky; top:0; height:100svh;
  display:grid; place-items:center;
  overflow:hidden; isolation:isolate;
}
.hero__grid{
  position:absolute; inset:-10%; z-index:-2;
  background-image:
    linear-gradient(rgba(255,255,255,.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.055) 1px, transparent 1px);
  background-size:72px 72px;
  mask-image:radial-gradient(ellipse 70% 60% at 50% 45%, #000 20%, transparent 78%);
  -webkit-mask-image:radial-gradient(ellipse 70% 60% at 50% 45%, #000 20%, transparent 78%);
  will-change:transform;
}
.hero__glow{
  position:absolute; z-index:-1;
  width:min(90vw, 900px); aspect-ratio:1;
  background:radial-gradient(circle, rgba(10,132,255,.24), transparent 62%);
  filter:blur(40px);
  will-change:transform, opacity;
}
.hero__inner{
  text-align:center; padding:0 var(--gutter);
  will-change:transform, opacity, filter;
}
.hero__role{
  margin:26px auto 0; max-width:34ch;
  font-size:clamp(1rem, 2.1vw, 1.45rem);
  font-weight:400; letter-spacing:-.015em; color:var(--smoke);
}
.hero__meta{
  margin:34px 0 0;
  display:flex; justify-content:center; align-items:center; gap:10px;
}
.hero__dot{
  width:7px; height:7px; border-radius:50%;
  background:var(--online);
  animation:pulse 2.6s var(--ease) infinite;
}
@keyframes pulse{
  0%  { box-shadow:0 0 0 0 rgba(48,209,88,.55); }
  70% { box-shadow:0 0 0 12px rgba(48,209,88,0); }
  100%{ box-shadow:0 0 0 0 rgba(48,209,88,0); }
}
.hero__cue{
  position:absolute; bottom:34px; left:50%;
  transform:translateX(-50%); will-change:opacity;
}
.hero__cue span{
  display:block; width:1px; height:44px;
  background:linear-gradient(to bottom, transparent, var(--smoke));
}

/* ─── 6. Accroche ───────────────────────────────────────────── */
.statement{
  min-height:110vh; display:flex; align-items:center;
  padding:20vh var(--gutter);
}
.word{ color:rgba(245,245,247,.16); transition:color .18s linear; }
.word--lit{ color:var(--paper); }
.word--key{ color:var(--signal); }

/* ─── 7. Lab ────────────────────────────────────────────────── */
.lab{ height:300vh; position:relative; }

.lab__pin{
  position:sticky; top:0; height:100svh;
  display:grid; grid-template-columns:minmax(0,1fr) minmax(0,1.15fr);
  align-items:center; gap:var(--gutter);
  padding:72px var(--gutter) 48px;
}
@media (max-width:900px){
  .lab__pin{
    grid-template-columns:1fr; grid-template-rows:auto 1fr;
    gap:24px; padding-top:64px;
  }
}
.lab__copy{ max-width:46ch; }
.lab__caption{ position:relative; margin-top:20px; min-height:5.4em; }

.lab__step{
  position:absolute; inset:0;
  opacity:0; transform:translateY(12px);
  transition:opacity .45s var(--ease), transform .45s var(--ease);
}
.lab__step[data-active="true"]{ opacity:1; transform:none; }

.topo{ width:100%; height:auto; max-height:62svh; }

.topo__link{
  stroke:var(--signal); stroke-width:1.25; fill:none; opacity:.55;
  stroke-dasharray:var(--len); stroke-dashoffset:var(--len);
}
.topo__node{ opacity:0; transform-box:fill-box; transform-origin:center; }
.topo__node circle{ fill:#0b0b0d; stroke:rgba(245,245,247,.42); stroke-width:1.25; }
.topo__node text{
  font-family:var(--mono); font-size:8.5px;
  fill:var(--smoke); text-anchor:middle;
}
.topo__node--core circle{ stroke:var(--signal); }
.topo__node--core text{ fill:var(--paper); }
.topo__packet{ fill:var(--online); opacity:0; }

/* ─── 8. Projets ────────────────────────────────────────────── */
.work{ background:var(--paper); color:var(--graphite); }

.work__head{ padding:18vh var(--gutter) 5vh; }
.work__head .t-title{ color:var(--ink); }
.work__head .t-body{ margin-top:16px; color:var(--slate); }

.project{
  border-top:1px solid rgba(0,0,0,.1);
  padding:clamp(48px,9vh,110px) var(--gutter);
  display:grid; grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);
  gap:clamp(20px,4vw,64px); align-items:start;
}
@media (max-width:820px){
  .project{ grid-template-columns:1fr; gap:18px; }
}
.project__aside{ will-change:transform; }

.project__name{
  margin:0; color:var(--ink);
  font-size:clamp(1.5rem,3vw,2.4rem);
  font-weight:600; letter-spacing:-.028em; line-height:1.05;
}
.project--featured .project__name{ font-size:clamp(1.8rem,3.8vw,3rem); }
.project--featured .project__desc{ font-size:clamp(1.08rem,1.5vw,1.3rem); }

.project__year{
  display:block; margin-top:10px;
  font-family:var(--mono); font-size:.72rem; color:var(--smoke);
}
.project__desc{
  margin:0; max-width:54ch; color:var(--slate);
  font-size:clamp(1rem,1.3vw,1.16rem); line-height:1.6;
}
.project__stack{
  list-style:none; margin:22px 0 0; padding:0;
  display:flex; flex-wrap:wrap; gap:7px;
}
.project__stack li{
  font-family:var(--mono); font-size:.7rem;
  padding:5px 10px; border-radius:100px;
  background:rgba(0,0,0,.055); color:#515154;
}
.project__links{ margin-top:24px; display:flex; flex-wrap:wrap; gap:22px; }
.project__link{
  font-size:.92rem; color:var(--signal); text-decoration:none;
  border-bottom:1px solid transparent;
  transition:border-color .25s var(--ease);
}
.project__link:hover{ border-bottom-color:var(--signal); }

/* Entrée unique, orchestrée */
.rise{
  opacity:0; transform:translateY(26px);
  transition:opacity .75s var(--ease), transform .75s var(--ease);
}
.rise[data-seen="true"]{ opacity:1; transform:none; }

/* ─── 9. Contact ────────────────────────────────────────────── */
.contact{ background:var(--ink); padding:22vh var(--gutter) 8vh; }

.contact__mail{
  display:inline-block; margin-top:28px;
  font-size:clamp(1.3rem,3.6vw,2.6rem);
  font-weight:600; letter-spacing:-.03em;
  color:var(--paper); text-decoration:none;
  background-image:linear-gradient(var(--signal), var(--signal));
  background-size:0% 2px; background-position:0 100%; background-repeat:no-repeat;
  transition:background-size .45s var(--ease), color .3s var(--ease);
}
.contact__mail:hover{ background-size:100% 2px; color:var(--signal); }

.contact__links{ margin-top:46px; display:flex; flex-wrap:wrap; gap:26px; }
.contact__links a{
  font-size:.92rem; color:var(--smoke); text-decoration:none;
  transition:color .25s var(--ease);
}
.contact__links a:hover{ color:var(--paper); }

.foot{
  padding:0 var(--gutter) 40px;
  display:flex; justify-content:space-between; flex-wrap:wrap; gap:12px;
}

/* ─── 10. Motion réduite ────────────────────────────────────── */
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .hero{ height:100svh; }
  .lab{ height:auto; }
  .lab__pin{ position:static; height:auto; padding-block:14vh; }
  .lab__caption{ min-height:0; }
  .lab__step{ position:static; opacity:1; transform:none; margin-bottom:14px; }
  .rise{ opacity:1; transform:none; }
  .word{ color:var(--paper); }
  .topo__node{ opacity:1; }
  .topo__link{ stroke-dashoffset:0; }
}