/* ============================================================
   SWANLEFTA — Design System v2.0.0
   Fondations : tokens · typographie · composants · interactions
   Identité : bordeaux profond · dégradé signature · Archivo wide
   ============================================================ */

:root{
  /* -- Couleurs : fond & surfaces -- */
  --bg:#120609;
  --bg2:#17090e;
  --surface:#1d0d13;
  --surface-2:#241019;
  --line:rgba(255,241,235,.08);
  --line-strong:rgba(255,241,235,.16);
  /* -- Couleurs : texte -- */
  --ink:#f7f2ee;
  --muted:#c6aea8;
  --muted2:#96807b;
  /* -- Couleurs : accents de marque -- */
  --yellow:#ffc53d;
  --orange:#f97316;
  --red:#e23222;
  --wine:#7a0e26;
  --grad:linear-gradient(115deg,#6e0b22 0%,#c81e1e 32%,#ef5a12 64%,#ffc53d 100%);
  /* -- Couleurs : états -- */
  --ok:#3dcc74;--ok-bg:#0e2e19;--ok-line:#2e7d43;
  --err:#ff6b57;--err-bg:#3a1016;--err-line:#e23222;
  /* -- Géométrie -- */
  --r-s:9px;--r-m:16px;--r-l:22px;--r-pill:999px;
  --shadow-1:0 1px 2px rgba(0,0,0,.3),0 6px 18px rgba(0,0,0,.22);
  --shadow-2:0 2px 4px rgba(0,0,0,.35),0 18px 44px rgba(0,0,0,.38);
  --glow:0 12px 34px rgba(239,90,18,.28);
  /* -- Mouvement -- */
  --ease:cubic-bezier(.22,.61,.2,1);
  --t-fast:.18s var(--ease);
  --t-med:.3s var(--ease);
  --font:'Archivo',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
}

/* ---- Reset & fondations ---- */
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}}
body{font-family:var(--font);font-variation-settings:'wdth' 100;background:var(--bg);color:var(--ink);line-height:1.68;font-size:1.0625rem;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img{max-width:100%;display:block}
a{color:inherit}
::selection{background:var(--yellow);color:#160910}
[id]{scroll-margin-top:96px}
h1,h2,h3{text-wrap:balance}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--yellow);color:#160910;padding:10px 16px;z-index:100;font-weight:700;border-radius:0 0 var(--r-s) 0}
.skip-link:focus{left:0;top:0}
:focus-visible{outline:2px solid var(--yellow);outline-offset:3px;border-radius:4px}

/* ---- Typographie display : la voix SWANLEFTA ---- */
.disp{font-weight:900;font-variation-settings:'wdth' 118;text-transform:uppercase;letter-spacing:.008em;line-height:1.03}
.eyebrow{display:inline-block;font-weight:700;text-transform:uppercase;letter-spacing:.32em;font-size:.76rem;color:var(--yellow);margin-bottom:18px}
.y{color:var(--yellow)}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}

/* ---- Header ---- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(18,6,9,.8);backdrop-filter:blur(14px) saturate(1.3);-webkit-backdrop-filter:blur(14px) saturate(1.3)}
.site-header::after{content:"";display:block;height:1px;background:linear-gradient(90deg,transparent,rgba(255,197,61,.35) 30%,rgba(239,90,18,.35) 70%,transparent)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:68px;flex-wrap:wrap;padding-top:8px;padding-bottom:8px}
.brand{font-weight:900;font-variation-settings:'wdth' 120;text-transform:uppercase;font-size:1.35rem;text-decoration:none;letter-spacing:.02em;display:flex;flex-direction:column;line-height:1;transition:opacity var(--t-fast)}
.brand:hover{opacity:.85}
.brand-sub{font-weight:600;font-variation-settings:'wdth' 100;font-size:.62rem;letter-spacing:.34em;color:var(--yellow);margin-top:4px}
.site-nav{display:flex;gap:4px;flex-wrap:wrap}
.site-nav a{position:relative;text-decoration:none;font-weight:600;font-size:.94rem;padding:9px 15px;border-radius:var(--r-pill);color:var(--muted);transition:color var(--t-fast),background var(--t-fast)}
.site-nav a::after{content:"";position:absolute;left:15px;right:15px;bottom:5px;height:2px;border-radius:2px;background:var(--grad);transform:scaleX(0);transform-origin:left;transition:transform var(--t-med)}
.site-nav a:hover{color:var(--ink)}
.site-nav a:hover::after{transform:scaleX(1)}
.site-nav a.on{color:var(--ink);background:var(--surface-2)}
.site-nav a.on::after{transform:scaleX(1)}

/* ---- Hero low-poly : la scène signature ---- */
.hero{position:relative;overflow:hidden;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='1200' height='640' preserveAspectRatio='none'%3E%3Cg fill='%23ffffff'%3E%3Cpolygon points='0,0 230,0 90,150' opacity='.05'/%3E%3Cpolygon points='230,0 520,0 360,190' opacity='.04'/%3E%3Cpolygon points='90,150 360,190 190,340' opacity='.03'/%3E%3Cpolygon points='700,60 940,0 880,220' opacity='.05'/%3E%3Cpolygon points='1200,0 1200,260 960,120' opacity='.06'/%3E%3Cpolygon points='420,420 660,360 560,560' opacity='.04'/%3E%3Cpolygon points='1020,420 1200,340 1200,640' opacity='.05'/%3E%3C/g%3E%3Cg fill='%23000000'%3E%3Cpolygon points='0,640 0,380 260,560' opacity='.08'/%3E%3Cpolygon points='520,0 700,60 610,180' opacity='.06'/%3E%3Cpolygon points='880,220 1080,260 940,430' opacity='.06'/%3E%3Cpolygon points='260,560 620,640 200,640' opacity='.07'/%3E%3Cpolygon points='660,360 900,520 640,640' opacity='.05'/%3E%3Cpolygon points='190,340 420,420 240,520' opacity='.05'/%3E%3C/g%3E%3C/svg%3E"),linear-gradient(115deg,#6e0b22 0%,#c81e1e 32%,#ef5a12 64%,#ffc53d 100%);background-size:cover,cover;background-position:center}
.hero::after{content:"";position:absolute;inset:0;background:radial-gradient(120% 90% at 20% 30%,transparent 40%,rgba(30,4,10,.34) 100%);pointer-events:none}
.hero .wrap{position:relative;z-index:1;padding-top:clamp(72px,10vw,112px);padding-bottom:clamp(80px,11vw,120px);max-width:980px}
.hero .eyebrow{color:#fff;opacity:.92}
.hero h1{font-size:clamp(2.3rem,6vw,4.4rem);text-shadow:0 2px 24px rgba(60,5,15,.4)}
.hero .lead{margin-top:26px;max-width:620px;font-size:clamp(1.05rem,1.6vw,1.18rem);font-weight:500;color:#fff8ef;line-height:1.7}
.hero-cta{margin-top:44px;display:flex;gap:22px;align-items:center;flex-wrap:wrap}
.hero .eyebrow,.hero h1,.hero .lead,.hero-cta{animation:rise .7s var(--ease) both}
.hero h1{animation-delay:.06s}
.hero .lead{animation-delay:.14s}
.hero-cta{animation-delay:.22s}
@keyframes rise{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}

/* ---- Cadre « dessiné main » : signature de la marque ---- */
.sketch{position:relative;display:inline-block;padding:16px 34px;text-decoration:none;font-weight:800;text-transform:uppercase;letter-spacing:.08em;font-size:1rem;color:#fff;transition:transform var(--t-fast)}
.sketch::before,.sketch::after{content:"";position:absolute;inset:0;border:2px solid #fff;border-radius:3px 8px 4px 9px/8px 3px 9px 4px;pointer-events:none;transition:transform var(--t-fast)}
.sketch::before{transform:rotate(.5deg)}
.sketch::after{transform:rotate(-.6deg);opacity:.55}
.sketch:hover{transform:translateY(-1px)}
.sketch:hover::before{transform:rotate(-.4deg)}
.sketch:hover::after{transform:rotate(.5deg)}
.sketch:active{transform:translateY(0)}
.link-plain{color:#fff;font-weight:700;text-decoration:none;border-bottom:2px solid rgba(255,255,255,.55);padding-bottom:3px;transition:border-color var(--t-fast)}
.link-plain:hover{border-color:#fff}

/* ---- Sections : le rythme vertical ---- */
.section{padding:clamp(64px,9vw,104px) 0}
.section.alt{background:var(--bg2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{max-width:720px;margin-bottom:clamp(36px,5vw,56px)}
.sec-head h2{font-size:clamp(1.7rem,3.6vw,2.6rem)}
.sec-head p{margin-top:16px;color:var(--muted)}

/* ---- Cartes : une seule logique pour tout le site ---- */
.pillar,.exp,.exp-block,.step{background:linear-gradient(180deg,var(--surface-2),var(--surface) 70%);border:1px solid var(--line);border-radius:var(--r-m);box-shadow:var(--shadow-1);transition:transform var(--t-med),border-color var(--t-med),box-shadow var(--t-med)}

.pillars{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.pillar{padding:32px 28px;position:relative;overflow:hidden}
.pillar::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--grad)}
.pillar h3{font-size:1.25rem;margin-bottom:10px}
.pillar p{color:var(--muted);font-size:.98rem}

.exp-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.exp{padding:30px 26px;text-decoration:none;display:block}
.exp:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow-2)}
.exp .tag{display:inline-block;font-size:.7rem;font-weight:700;letter-spacing:.22em;text-transform:uppercase;color:var(--yellow);margin-bottom:12px}
.exp h3{font-size:1.15rem;margin-bottom:8px}
.exp p{color:var(--muted);font-size:.95rem}

/* ---- Bande CTA gradient ---- */
.cta-band{background-image:linear-gradient(115deg,#6e0b22 0%,#c81e1e 32%,#ef5a12 64%,#ffc53d 100%);position:relative;overflow:hidden}
.cta-band .wrap{padding-top:clamp(56px,8vw,80px);padding-bottom:clamp(56px,8vw,80px);display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap}
.cta-band h2{font-size:clamp(1.6rem,3.4vw,2.3rem);max-width:560px;text-shadow:0 2px 18px rgba(60,5,15,.3)}

/* ---- Pages intérieures ---- */
.page-head{background:var(--bg2);border-bottom:1px solid var(--line)}
.page-head .wrap{padding-top:clamp(56px,8vw,80px);padding-bottom:clamp(44px,6vw,60px);max-width:880px}
.page-head h1{font-size:clamp(2rem,4.6vw,3.2rem)}
.page-head p{margin-top:16px;color:var(--muted);max-width:640px}

.exp-detail{display:grid;grid-template-columns:repeat(2,1fr);gap:26px}
.exp-block{padding:34px 30px}
.exp-block h2{font-size:1.3rem;margin-bottom:12px}
.exp-block p{color:var(--muted);font-size:.98rem}
.exp-block ul{margin:14px 0 0 18px;color:var(--muted);font-size:.96rem}
.exp-block li{margin-bottom:7px}
.exp-block li::marker{color:var(--orange)}
.note{margin-top:40px;padding:24px 28px;border-left:3px solid var(--yellow);background:linear-gradient(180deg,var(--surface-2),var(--surface));border-radius:0 var(--r-m) var(--r-m) 0;color:var(--muted);font-size:.94rem;box-shadow:var(--shadow-1)}

/* ---- Process (investissement) ---- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step}
.step{padding:28px 24px;counter-increment:step}
.step:hover{transform:translateY(-3px);border-color:var(--line-strong)}
.step::before{content:counter(step,decimal-leading-zero);font-weight:900;font-variation-settings:'wdth' 120;font-size:1.6rem;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;display:block;margin-bottom:10px}
.step h3{font-size:1.05rem;margin-bottom:6px}
.step p{color:var(--muted);font-size:.92rem}
.profiles{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}

/* ---- Formulaires ---- */
.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;max-width:760px}
.form-grid .full{grid-column:1/-1}
label{display:block;font-weight:600;font-size:.88rem;letter-spacing:.02em;margin-bottom:7px;color:var(--muted)}
input,textarea{width:100%;background:var(--surface);border:1px solid var(--line-strong);border-radius:var(--r-s);padding:14px 16px;color:var(--ink);font-family:var(--font);font-size:1rem;transition:border-color var(--t-fast),box-shadow var(--t-fast),background var(--t-fast)}
input::placeholder,textarea::placeholder{color:var(--muted2)}
input:hover,textarea:hover{border-color:rgba(255,241,235,.25)}
input:focus,textarea:focus{outline:none;border-color:var(--yellow);box-shadow:0 0 0 3px rgba(255,197,61,.16);background:var(--surface-2)}
textarea{min-height:150px;resize:vertical}
.hp{position:absolute;left:-9999px;top:-9999px;height:0;overflow:hidden}
.btn{display:inline-block;background:var(--grad);color:#fff;border:none;border-radius:var(--r-s);padding:16px 36px;font-weight:800;font-size:1rem;text-transform:uppercase;letter-spacing:.06em;cursor:pointer;font-family:var(--font);box-shadow:var(--glow);transition:transform var(--t-fast),box-shadow var(--t-fast),filter var(--t-fast)}
.btn:hover{transform:translateY(-2px);filter:brightness(1.07);box-shadow:0 16px 42px rgba(239,90,18,.38)}
.btn:active{transform:translateY(0);box-shadow:var(--glow)}
.alert{padding:16px 20px;border-radius:var(--r-s);margin-bottom:26px;font-weight:600}
.alert.ok{background:var(--ok-bg);border:1px solid var(--ok-line);color:#c9f0d2}
.alert.err{background:var(--err-bg);border:1px solid var(--err-line);color:#ffd7cf}

/* ---- Prose (mentions) ---- */
.prose{max-width:760px}
.prose h2{font-size:1.25rem;margin:38px 0 10px}
.prose p{color:var(--muted);margin-bottom:12px}

/* ---- Footer ---- */
.site-footer{border-top:1px solid var(--line);background:linear-gradient(180deg,var(--bg2),#10050a)}
.foot-grid{display:flex;justify-content:space-between;gap:32px;flex-wrap:wrap;padding-top:60px;padding-bottom:40px}
.foot-brand{font-weight:900;font-variation-settings:'wdth' 120;text-transform:uppercase;font-size:1.2rem}
.foot-line{font-size:.92rem;margin-top:4px}
.muted{color:var(--muted2)}
.foot-nav{display:flex;gap:6px 22px;flex-wrap:wrap;align-items:flex-start}
.foot-nav a{color:var(--muted);text-decoration:none;font-size:.95rem;padding:4px 0;border-bottom:1px solid transparent;transition:color var(--t-fast),border-color var(--t-fast)}
.foot-nav a:hover{color:var(--ink);border-color:var(--yellow)}
.foot-bottom{border-top:1px solid var(--line);padding-top:18px;padding-bottom:26px;font-size:.85rem;color:var(--muted2)}

/* ---- Chiffres & prix ---- */
.tf-price,.tf-opt-price,.cr-num,.delay-num{font-variant-numeric:tabular-nums lining-nums}

/* ---- Responsive ---- */
@media(max-width:900px){
  .pillars,.exp-grid,.profiles{grid-template-columns:1fr 1fr}
  .steps{grid-template-columns:1fr 1fr}
  .exp-detail{grid-template-columns:1fr}
}
@media(max-width:600px){
  .pillars,.exp-grid,.steps,.profiles,.form-grid{grid-template-columns:1fr}
  .hero .wrap{padding-top:64px;padding-bottom:72px}
  .cta-band .wrap{justify-content:flex-start}
}