/* ==========================================================================
   Jyssc — site vitrine
   Feuille de style unique, sans dépendance externe.
   ========================================================================== */

/* --- Tokens ------------------------------------------------------------- */
:root{
  --bg:              #0b1020;
  --bg-alt:          #0f1630;
  --surface:         rgba(255,255,255,.04);
  --surface-strong:  rgba(255,255,255,.07);
  --border:          rgba(255,255,255,.10);
  --text:            #e8ecf6;
  --text-muted:      #9aa5c0;
  --brand:           #4f8cff;
  --brand-2:         #22d3ee;
  --brand-3:         #a855f7;
  --ring:            rgba(79,140,255,.45);

  --radius:    16px;
  --radius-sm: 10px;
  --maxw:      1120px;
  --shadow:    0 20px 60px rgba(2,6,23,.55);
  --font: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --mono: "JetBrains Mono", "Cascadia Code", Consolas, "SF Mono", monospace;
}

/* --- Reset -------------------------------------------------------------- */
*,*::before,*::after{ box-sizing:border-box }
html{ scroll-behavior:smooth; -webkit-text-size-adjust:100% }
body{
  margin:0;
  font-family:var(--font);
  font-size:17px;
  line-height:1.65;
  color:var(--text);
  background:var(--bg);
  background-image:
    radial-gradient(900px 500px at 12% -8%,  rgba(79,140,255,.18), transparent 60%),
    radial-gradient(700px 500px at 92% 4%,   rgba(168,85,247,.14), transparent 60%);
  background-attachment:fixed;
  overflow-x:hidden;
}
img{ max-width:100%; display:block }
h1,h2,h3{ line-height:1.2; margin:0 0 .6em; letter-spacing:-.02em }
h1{ font-size:clamp(2.1rem, 5vw, 3.4rem) }
h2{ font-size:clamp(1.7rem, 3.4vw, 2.4rem) }
h3{ font-size:1.15rem }
p{ margin:0 0 1rem }
a{ color:var(--brand); text-decoration:none }
a:hover{ text-decoration:underline }
ul,ol{ margin:0; padding:0; list-style:none }

:focus-visible{ outline:2px solid var(--brand); outline-offset:3px; border-radius:6px }

.skip-link{
  position:absolute; left:-9999px; top:0; z-index:999;
  background:var(--brand); color:#fff; padding:.7rem 1rem; border-radius:0 0 10px 0;
}
.skip-link:focus{ left:0 }

/* --- Utilitaires -------------------------------------------------------- */
.container{ width:min(100% - 2.5rem, var(--maxw)); margin-inline:auto }
.center{ text-align:center }
.muted{ color:var(--text-muted) }
.small{ font-size:.9rem }
.grad{
  background:linear-gradient(100deg, var(--brand-2), var(--brand) 45%, var(--brand-3));
  -webkit-background-clip:text; background-clip:text; color:transparent;
}
.eyebrow{
  text-transform:uppercase; letter-spacing:.16em; font-size:.75rem; font-weight:700;
  color:var(--brand-2); margin:0 0 .8rem;
}
.section-lead{ color:var(--text-muted); max-width:62ch; margin-inline:auto }
.section{ padding:clamp(4rem, 9vw, 7rem) 0 }
.section-alt{ background:linear-gradient(180deg, transparent, var(--bg-alt) 22%, var(--bg-alt) 78%, transparent) }
.section h2 + .section-lead{ margin-bottom:3rem }

.grid{ display:grid; gap:1.25rem }
.grid-2{ grid-template-columns:repeat(auto-fit, minmax(320px,1fr)) }
.grid-3{ grid-template-columns:repeat(auto-fit, minmax(280px,1fr)) }

/* --- Boutons ------------------------------------------------------------ */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:.5rem;
  padding:.85rem 1.5rem; border-radius:999px; border:1px solid transparent;
  font-weight:600; font-size:.98rem; font-family:inherit; cursor:pointer;
  transition:transform .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease;
  text-decoration:none;
}
.btn:hover{ text-decoration:none; transform:translateY(-2px) }
.btn-primary{
  background:linear-gradient(100deg, var(--brand), var(--brand-3));
  color:#fff; box-shadow:0 10px 30px rgba(79,140,255,.32);
}
.btn-primary:hover{ box-shadow:0 16px 40px rgba(79,140,255,.45) }
.btn-ghost{ background:var(--surface); color:var(--text); border-color:var(--border) }
.btn-ghost:hover{ background:var(--surface-strong); border-color:var(--ring) }
.btn-sm{ padding:.55rem 1.05rem; font-size:.9rem }
.btn-block{ width:100%; margin-top:.5rem }

/* --- En-tête ------------------------------------------------------------ */
.site-header{
  position:sticky; top:0; z-index:50;
  backdrop-filter:blur(14px); -webkit-backdrop-filter:blur(14px);
  background:rgba(11,16,32,.6);
  border-bottom:1px solid transparent;
  transition:border-color .25s ease, background .25s ease;
}
.site-header.scrolled{ border-bottom-color:var(--border); background:rgba(11,16,32,.85) }
.header-inner{ display:flex; align-items:center; justify-content:space-between; gap:1rem; height:70px }

.brand{ display:inline-flex; align-items:center; gap:.6rem; color:var(--text); font-weight:800; letter-spacing:-.02em }
.brand:hover{ text-decoration:none }
.brand-mark{
  display:grid; place-items:center; width:34px; height:34px; border-radius:10px;
  background:linear-gradient(135deg, var(--brand), var(--brand-3));
  color:#fff; font-size:1.05rem; box-shadow:0 6px 18px rgba(79,140,255,.35);
}
.brand-text{ font-size:1.25rem }

.nav{ display:flex; align-items:center; gap:1.6rem }
.nav > a{ color:var(--text-muted); font-size:.95rem; font-weight:500 }
.nav > a:hover{ color:var(--text); text-decoration:none }
.nav > a.btn-primary{ color:#fff }

.nav-toggle{
  display:none; flex-direction:column; gap:5px; justify-content:center;
  width:42px; height:42px; padding:0 10px; cursor:pointer;
  background:var(--surface); border:1px solid var(--border); border-radius:var(--radius-sm);
}
.nav-toggle span{ display:block; height:2px; background:var(--text); border-radius:2px; transition:transform .25s ease, opacity .2s ease }
.nav-toggle[aria-expanded="true"] span:nth-child(1){ transform:translateY(7px) rotate(45deg) }
.nav-toggle[aria-expanded="true"] span:nth-child(2){ opacity:0 }
.nav-toggle[aria-expanded="true"] span:nth-child(3){ transform:translateY(-7px) rotate(-45deg) }

/* --- Hero --------------------------------------------------------------- */
.hero{ padding:clamp(3.5rem, 8vw, 6.5rem) 0 clamp(3rem, 7vw, 5rem) }
.hero-inner{ display:grid; grid-template-columns:1.05fr .95fr; gap:3rem; align-items:center }
.hero .lead{ font-size:1.1rem; color:var(--text-muted); max-width:56ch }
.hero-actions{ display:flex; flex-wrap:wrap; gap:.8rem; margin:2rem 0 1.6rem }
.hero-points{ display:flex; flex-wrap:wrap; gap:1.2rem; color:var(--text-muted); font-size:.92rem }
.hero-points li::before{ content:"◆"; color:var(--brand-2); margin-right:.5rem; font-size:.7rem; vertical-align:middle }

.hero-visual{ position:relative }
.glow{
  position:absolute; inset:12% -10% -18% 8%; z-index:-1; filter:blur(70px); opacity:.55;
  background:radial-gradient(closest-side, rgba(79,140,255,.55), transparent 70%),
             radial-gradient(closest-side at 70% 60%, rgba(168,85,247,.5), transparent 70%);
}
.window{
  background:linear-gradient(180deg, rgba(255,255,255,.07), rgba(255,255,255,.02));
  border:1px solid var(--border); border-radius:var(--radius);
  box-shadow:var(--shadow); overflow:hidden;
}
.window-bar{
  display:flex; align-items:center; gap:.45rem;
  padding:.7rem .9rem; border-bottom:1px solid var(--border); background:rgba(255,255,255,.03);
}
.window-bar i{ width:11px; height:11px; border-radius:50%; background:#ff5f57 }
.window-bar i:nth-child(2){ background:#febc2e }
.window-bar i:nth-child(3){ background:#28c840 }
.window-bar span{ margin-left:.6rem; font-size:.78rem; color:var(--text-muted); font-family:var(--mono) }
.code{
  margin:0; padding:1.4rem 1.3rem; overflow-x:auto;
  font-family:var(--mono); font-size:.86rem; line-height:1.75; color:#cbd5e1;
}
.c-key{ color:#c084fc } .c-prop{ color:#7dd3fc } .c-str{ color:#86efac } .c-fn{ color:#fbbf24 }

/* --- Cartes ------------------------------------------------------------- */
.card{
  background:var(--surface); border:1px solid var(--border); border-radius:var(--radius);
  padding:1.7rem 1.5rem;
  transition:transform .2s ease, border-color .2s ease, background .2s ease, box-shadow .2s ease;
}
.card:hover{ transform:translateY(-4px); border-color:var(--ring); background:var(--surface-strong); box-shadow:var(--shadow) }
.card h3{ margin-bottom:.45rem }
.card p{ color:var(--text-muted); margin:0; font-size:.95rem }
.card-icon{
  display:grid; place-items:center; width:46px; height:46px; margin-bottom:1.1rem;
  border-radius:12px; font-size:1.3rem; color:var(--brand-2);
  background:linear-gradient(135deg, rgba(79,140,255,.18), rgba(168,85,247,.18));
  border:1px solid var(--border);
}

/* --- Projets ------------------------------------------------------------ */
.project{
  display:flex; flex-direction:column;
  background:var(--surface); border:1px solid var(--border); border-radius:var(--radius);
  overflow:hidden; transition:transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.project:hover{ transform:translateY(-4px); border-color:var(--ring); box-shadow:var(--shadow) }
.project-cover{
  display:grid; place-items:center; height:150px; font-size:2.6rem; font-weight:800; letter-spacing:-.04em;
  background:linear-gradient(135deg, rgba(79,140,255,.28), rgba(168,85,247,.28));
  border-bottom:1px solid var(--border); color:#fff;
}
.project-body{ padding:1.5rem; display:flex; flex-direction:column; flex:1 }
.project-head{ display:flex; align-items:center; gap:.75rem; flex-wrap:wrap; margin-bottom:.6rem }
.project-head h3{ margin:0 }
.badge{
  font-size:.72rem; font-weight:700; letter-spacing:.06em; text-transform:uppercase;
  padding:.25rem .6rem; border-radius:999px; border:1px solid var(--border); color:var(--text-muted);
  background:rgba(255,255,255,.04);
}
.badge-live{ color:#86efac; border-color:rgba(134,239,172,.35); background:rgba(134,239,172,.08) }
.badge-soon{ color:#fbbf24; border-color:rgba(251,191,36,.35); background:rgba(251,191,36,.08) }
.project-body > p{ color:var(--text-muted); font-size:.95rem }
.tags{ display:flex; flex-wrap:wrap; gap:.45rem; margin:.4rem 0 1.2rem }
.tag{ font-size:.78rem; color:var(--text-muted); padding:.22rem .6rem; border:1px solid var(--border); border-radius:8px }
.project-actions{ margin-top:auto; display:flex; gap:.6rem; flex-wrap:wrap }

/* --- Étapes ------------------------------------------------------------- */
.steps{ display:grid; grid-template-columns:repeat(auto-fit, minmax(230px,1fr)); gap:1.25rem; margin-top:3rem; counter-reset:s }
.steps li{
  position:relative; padding:1.7rem 1.4rem 1.4rem;
  background:var(--surface); border:1px solid var(--border); border-radius:var(--radius);
}
.step-num{
  position:absolute; top:-16px; left:1.4rem;
  display:grid; place-items:center; width:34px; height:34px; border-radius:10px;
  background:linear-gradient(135deg, var(--brand), var(--brand-3)); color:#fff; font-weight:800;
  box-shadow:0 8px 20px rgba(79,140,255,.35);
}
.steps h3{ margin:.5rem 0 .4rem }
.steps p{ margin:0; color:var(--text-muted); font-size:.93rem }

/* --- À propos ----------------------------------------------------------- */
.about{ display:grid; grid-template-columns:1.25fr .75fr; gap:3rem; align-items:center }
.about p{ color:var(--text-muted) }
.checklist{ margin-top:1.5rem; display:grid; gap:.6rem }
.checklist li{ position:relative; padding-left:1.9rem; color:var(--text) }
.checklist li::before{
  content:"✓"; position:absolute; left:0; top:0;
  display:grid; place-items:center; width:22px; height:22px; border-radius:7px;
  background:rgba(34,211,238,.14); color:var(--brand-2); font-size:.8rem; font-weight:700;
}
.stats{ display:grid; grid-template-columns:1fr 1fr; gap:1rem }
.stat{
  background:var(--surface); border:1px solid var(--border); border-radius:var(--radius);
  padding:1.4rem 1rem; text-align:center;
}
.stat strong{ display:block; font-size:1.6rem; letter-spacing:-.03em }
.stat span{ font-size:.85rem; color:var(--text-muted) }

/* --- Contact ------------------------------------------------------------ */
.contact{ display:grid; grid-template-columns:1fr 1fr; gap:3rem; align-items:start }
.contact .section-lead{ margin-inline:0 }
.contact-list{ display:grid; gap:1rem; margin-top:2rem }
.contact-list li{ display:flex; align-items:center; gap:.9rem; color:var(--text-muted) }
.ci{
  display:grid; place-items:center; width:38px; height:38px; border-radius:11px; flex:none;
  background:linear-gradient(135deg, rgba(79,140,255,.18), rgba(168,85,247,.18));
  border:1px solid var(--border); color:var(--brand-2);
}

.form{
  background:var(--surface); border:1px solid var(--border); border-radius:var(--radius);
  padding:1.8rem 1.6rem; box-shadow:var(--shadow);
}
.field{ margin-bottom:1.1rem }
.field label{ display:block; font-size:.88rem; font-weight:600; margin-bottom:.4rem }
.field input,.field select,.field textarea{
  width:100%; padding:.8rem .9rem; font:inherit; font-size:.95rem; color:var(--text);
  background:rgba(0,0,0,.25); border:1px solid var(--border); border-radius:var(--radius-sm);
  transition:border-color .18s ease, box-shadow .18s ease;
}
.field textarea{ resize:vertical; min-height:120px }
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none; border-color:var(--brand); box-shadow:0 0 0 3px var(--ring);
}
.field .error{ display:block; margin-top:.35rem; font-size:.82rem; color:#fca5a5 }
.field input[aria-invalid="true"],.field textarea[aria-invalid="true"]{ border-color:#f87171 }
.form-note{ margin:.2rem 0 0 }
.form-status{ margin:.9rem 0 0; font-size:.92rem; min-height:1.2em }
.form-status.ok{ color:#86efac }
.form-status.ko{ color:#fca5a5 }

/* --- Pied de page ------------------------------------------------------- */
.site-footer{ border-top:1px solid var(--border); background:rgba(0,0,0,.25); padding:3rem 0 1.5rem }
.footer-inner{ display:flex; justify-content:space-between; gap:2rem; flex-wrap:wrap }
.footer-inner .small{ max-width:42ch; margin:.8rem 0 0 }
.footer-nav{ display:flex; gap:1.5rem; flex-wrap:wrap; align-items:flex-start }
.footer-nav a{ color:var(--text-muted); font-size:.93rem }
.footer-nav a:hover{ color:var(--text); text-decoration:none }
.footer-bottom{ margin-top:2.5rem; padding-top:1.2rem; border-top:1px solid var(--border) }
.footer-bottom p{ margin:0 }

/* --- Pages internes (mentions légales) ---------------------------------- */
.page{ padding:clamp(3rem, 7vw, 5rem) 0 }
.page .prose{ max-width:74ch }
.page .prose h2{ margin-top:2.5rem; font-size:1.35rem }
.page .prose p, .page .prose li{ color:var(--text-muted) }
.page .prose ul{ list-style:disc; padding-left:1.4rem; margin-bottom:1rem }
.todo{
  display:inline-block; padding:.05rem .45rem; border-radius:6px;
  background:rgba(251,191,36,.14); color:#fbbf24; font-size:.85rem; font-weight:600;
}

/* --- Apparition au défilement ------------------------------------------- */
.reveal{ opacity:0; transform:translateY(22px); transition:opacity .6s ease, transform .6s ease }
.reveal.visible{ opacity:1; transform:none }

/* --- Responsive --------------------------------------------------------- */
@media (max-width: 900px){
  .hero-inner,.about,.contact{ grid-template-columns:1fr; gap:2.5rem }
  .hero-visual{ order:-1 }
  .stats{ grid-template-columns:repeat(4, 1fr) }
}
@media (max-width: 780px){
  .nav-toggle{ display:flex }
  .nav{
    position:fixed; inset:70px 0 auto 0;
    flex-direction:column; align-items:stretch; gap:0;
    padding:1rem 1.25rem 1.5rem;
    background:rgba(11,16,32,.98); border-bottom:1px solid var(--border);
    transform:translateY(-130%); transition:transform .3s ease; box-shadow:var(--shadow);
  }
  .nav.open{ transform:none }
  .nav > a{ padding:.9rem .2rem; border-bottom:1px solid var(--border); font-size:1rem }
  .nav > a.btn{ margin-top:1rem; border-bottom:none; justify-content:center }
}
@media (max-width: 560px){
  body{ font-size:16px }
  .stats{ grid-template-columns:1fr 1fr }
  .footer-inner{ flex-direction:column; gap:1.5rem }
}

@media (prefers-reduced-motion: reduce){
  *{ animation:none !important; transition:none !important; scroll-behavior:auto !important }
  .reveal{ opacity:1; transform:none }
}