/* Mise en page : grands titres serrés, ciel en en-tête, bandeau bleu nuit, bande statistiques claire, bloc terracotta, pied noir.
   Couleurs et polices = jetons ci-dessous (clair / sombre). */
:root{
  --bg:#ffffff; --fg:#0b1117; --mute:#5d6671; --rule:#d9dde2; --surface:#eef2f7; --concept:#dfe7f1;
  --sky-a:#8fa6c6; --sky-b:#c4d1e3;
  --night:#171a2b; --night-fg:#e8eaf3; --night-mute:#a9aec6; --night-rule:#3a3e58;
  --clay:#b5705a; --clay-fg:#ffffff;
  --series:#2a78d6; --series-wash:rgba(42,120,214,.12); --grid:#e3e6ea;
  --tip-bg:#0b1117; --tip-fg:#ffffff;
  --foot:#0b1117; --foot-fg:#ffffff; --foot-mute:#8a919a; --foot-link:#c9ced6;
  --font:'Inter Tight','Helvetica Neue',Arial,sans-serif;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#0e1118; --fg:#eef0f4; --mute:#9aa3b0; --rule:#2a303b; --surface:#171c26; --concept:#18202e;
    --sky-a:#22335a; --sky-b:#16203a;
    --night:#1b1f36; --night-rule:#3a3e58;
    --series:#3987e5; --series-wash:rgba(57,135,229,.16); --grid:#232935;
    --tip-bg:#eef0f4; --tip-fg:#0b1117;
    --foot:#07090d;
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --bg:#0e1118; --fg:#eef0f4; --mute:#9aa3b0; --rule:#2a303b; --surface:#171c26; --concept:#18202e;
  --sky-a:#22335a; --sky-b:#16203a;
  --night:#1b1f36; --night-rule:#3a3e58;
  --series:#3987e5; --series-wash:rgba(57,135,229,.16); --grid:#232935;
  --tip-bg:#eef0f4; --tip-fg:#0b1117;
  --foot:#07090d;
  color-scheme:dark;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--fg);font-family:var(--font);font-size:18px;line-height:1.4;letter-spacing:-.01em;-webkit-text-size-adjust:100%}
a{color:inherit}
:focus-visible{outline:3px solid var(--series);outline-offset:3px;border-radius:4px}
.wrap{max-width:1200px;margin:0 auto;padding-inline:24px}
@media (max-width:480px){.wrap{padding-inline:16px}}

/* en-tête et ciel */
header{position:absolute;inset:0 0 auto 0;z-index:5}
header .wrap{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;padding-block:22px}
.logo{font-weight:700;font-size:26px;letter-spacing:-.04em;text-decoration:none}
.logo sup{font-size:.4em}
nav{display:flex;gap:6px 26px;font-weight:500;font-size:16px;flex-wrap:wrap}
nav a{text-decoration:none}
nav a:hover{text-decoration:underline}
.hero{position:relative;overflow:hidden;background:linear-gradient(var(--sky-a) 0%,var(--sky-b) 45%,var(--bg) 92%);padding-top:130px}
.hero-text{padding-block:30px 56px;position:relative;z-index:3}
.hero-nuages{position:absolute;inset:0;z-index:1;pointer-events:none}
.hero-nuages canvas{width:100%;height:100%;display:block}
.hero-3d{position:absolute;z-index:2;top:70px;right:max(0px,calc(50vw - 660px));width:min(52vw,700px);height:calc(100% - 90px);pointer-events:none}
.hero-3d canvas{width:100%;height:100%;display:block}
@media(max-width:820px){.hero-3d{position:relative;top:auto;right:auto;width:100%;height:280px;margin-top:-6px}.hero{display:flex;flex-direction:column}.hero-text{order:1}.hero-3d{order:2}}
h1{font-size:clamp(46px,9vw,112px);line-height:.95;letter-spacing:-.045em;margin:0 0 18px;font-weight:600;text-wrap:balance}
.sub{font-size:clamp(20px,2.6vw,30px);font-weight:500;margin:0 0 28px;letter-spacing:-.025em;max-width:30ch}
.pill{display:inline-block;background:var(--fg);color:var(--bg);text-decoration:none;font-weight:600;padding:14px 26px;border-radius:999px;margin:0 8px 8px 0;font-size:17px}
.pill.out{background:transparent;color:var(--fg);border:1.5px solid var(--fg)}
.pill:hover{opacity:.82}
.statement{border-top:1px solid var(--rule);padding-block:64px 90px}
.statement p{font-size:clamp(28px,4.4vw,56px);line-height:1.06;letter-spacing:-.035em;font-weight:600;margin:0;max-width:1000px;text-wrap:balance}
.cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:32px;border-top:1px solid var(--fg);padding-block:22px 80px}
.cols h3{font-size:22px;margin:0 0 8px;letter-spacing:-.03em}
.cols p{margin:0;color:var(--mute);font-size:18px}

/* bandeau bleu nuit : le réseau en chiffres */
.night{background:var(--night);color:var(--night-fg);padding-block:70px 80px}
.night h2{font-size:clamp(40px,7vw,84px);letter-spacing:-.045em;line-height:.95;margin:0 0 40px;font-weight:600;color:var(--night-fg)}
.nums{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:28px;border-top:1px solid var(--night-rule);padding-top:26px}
.nums b{display:block;font-size:clamp(44px,6vw,76px);font-weight:600;letter-spacing:-.045em;line-height:1;font-variant-numeric:tabular-nums;overflow-wrap:anywhere}
.nums span{color:var(--night-mute);font-size:16px}
.note{color:var(--night-mute);font-size:14px;margin-top:26px}

/* bande statistiques */
.stats{padding-block:90px 20px}
.eyebrow{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:14px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--mute);margin:0 0 14px}
.live-dot{width:10px;height:10px;border-radius:50%;background:var(--series);box-shadow:0 0 0 4px var(--series-wash)}
.stats h2{font-size:clamp(40px,7vw,84px);letter-spacing:-.045em;line-height:.95;margin:0 0 18px;font-weight:600;text-wrap:balance}
.stats .lead{font-size:clamp(19px,2.2vw,24px);letter-spacing:-.02em;max-width:760px;margin:0 0 24px;color:var(--fg)}
.chip{display:inline-block;font-size:14px;font-weight:600;padding:6px 14px;border-radius:999px;border:1.5px solid var(--rule);color:var(--mute);margin:0 0 32px}
.chip.real{border-color:var(--series);color:var(--fg)}
.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,150px),1fr));gap:20px;margin-bottom:20px}
.kpi{background:var(--surface);border-radius:22px;padding:26px 26px 24px;min-width:0}
.kpi b{display:block;font-size:clamp(46px,6vw,76px);font-weight:600;letter-spacing:-.05em;line-height:1;font-variant-numeric:tabular-nums}
.kpi b small{font-size:.36em;letter-spacing:-.02em;font-weight:600;margin-left:6px;color:var(--mute)}
.kpi span{display:block;font-size:17px;font-weight:600;margin-top:12px}
.kpi em{display:block;font-style:normal;font-size:14px;color:var(--mute);margin-top:4px}
.charts{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,420px),1fr));gap:20px;margin-bottom:20px}
.viz{position:relative;background:var(--surface);border-radius:22px;padding:24px 24px 18px;min-width:0}
.viz h3{font-size:24px;letter-spacing:-.03em;margin:0 0 4px}
.viz p{margin:0 0 14px;color:var(--mute);font-size:15px}
.viz svg{display:block;width:100%;height:auto;overflow:visible}
.viz svg text{font-family:var(--font);font-size:11.5px;fill:var(--mute)}
.viz svg text.val{fill:var(--fg);font-weight:600;font-size:12.5px}
.viz .gridline{stroke:var(--grid);stroke-width:1}
.viz .bar{fill:var(--series)}
.viz .hit{fill:transparent}
.viz .hit:hover + .bar,.viz .on .bar{opacity:.78}
.tip{position:absolute;z-index:3;pointer-events:none;background:var(--tip-bg);color:var(--tip-fg);font-size:14px;line-height:1.3;padding:8px 12px;border-radius:10px;max-width:240px;opacity:0;transition:opacity .12s}
.tip.show{opacity:1}
.tip b{display:block;font-weight:600}
.byst{background:var(--surface);border-radius:22px;padding:24px;margin-bottom:20px}
.byst h3{font-size:24px;letter-spacing:-.03em;margin:0 0 4px}
.byst > p{margin:0 0 14px;color:var(--mute);font-size:15px}
.strow{display:grid;grid-template-columns:minmax(120px,1.2fr) minmax(70px,.6fr) minmax(160px,2fr) minmax(70px,.7fr);gap:8px 18px;align-items:center;padding-block:14px;border-top:1px solid var(--rule)}
.strow.head{border-top:0;padding-block:0 8px;font-size:13px;font-weight:600;letter-spacing:.05em;text-transform:uppercase;color:var(--mute)}
.strow .nm{font-weight:600;font-size:19px;overflow-wrap:anywhere}
.strow .nm small{display:block;font-weight:400;font-size:13px;color:var(--mute)}
.strow .num{font-variant-numeric:tabular-nums;font-weight:600}
.rec{display:flex;align-items:center;gap:12px;min-width:0}
.rec i{display:block;height:10px;border-radius:5px;background:var(--series);min-width:3px}
.rec span{font-variant-numeric:tabular-nums;font-weight:600;white-space:nowrap}
.strow .lab{display:none;font-size:12px;font-weight:600;letter-spacing:.05em;text-transform:uppercase;color:var(--mute)}
@media (max-width:640px){
  .strow{grid-template-columns:1fr 1fr}
  .strow.head{display:none}
  .strow .nm{grid-column:1/-1}
  .strow .lab{display:block}
  .strow .rec{grid-column:1/-1}
}
details.tbl{margin:0 0 20px}
details.tbl summary{cursor:pointer;font-weight:600;padding:10px 0;color:var(--fg)}
.tbl .scroll{overflow-x:auto;border-radius:14px;border:1px solid var(--rule)}
.tbl table{border-collapse:collapse;width:100%;min-width:480px;font-size:15px;font-variant-numeric:tabular-nums}
.tbl th,.tbl td{text-align:right;padding:9px 14px;border-bottom:1px solid var(--rule)}
.tbl th:first-child,.tbl td:first-child{text-align:left}
.tbl th{font-size:13px;letter-spacing:.04em;text-transform:uppercase;color:var(--mute)}
.privacy{font-size:15px;color:var(--mute);max-width:760px;margin:0 0 70px}

/* cartes stations */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px;padding-block:60px 40px}
.card{border-radius:22px;overflow:hidden;background:var(--surface);min-width:0}
.card .body{padding:22px 24px 28px}
.card h3{font-size:30px;letter-spacing:-.04em;margin:0 0 8px;line-height:1}
.card p{margin:0 0 14px;color:var(--mute)}

/* comment ça marche */
.concept{background:var(--concept);border-radius:22px;padding:44px clamp(24px,4vw,56px) 40px;margin-bottom:90px}
.concept h2{font-size:clamp(32px,5vw,58px);letter-spacing:-.045em;line-height:1;margin:0 0 14px;font-weight:600}
.concept .lead{font-size:clamp(19px,2.2vw,24px);letter-spacing:-.02em;margin:0 0 34px;max-width:820px}
.roles{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:28px}
.role{border-top:1.5px solid var(--fg);padding-top:16px;min-width:0}
.role h3{font-size:24px;letter-spacing:-.03em;margin:0 0 8px}
.role p{margin:0;color:var(--mute);font-size:17px}
.goal{margin:36px 0 0;padding-top:22px;border-top:1px solid var(--rule);font-size:clamp(20px,2.4vw,28px);font-weight:600;letter-spacing:-.03em;line-height:1.15;max-width:900px}

/* contact */
.clay{background:var(--clay);color:var(--clay-fg);padding-block:80px}
.clay h2{font-size:clamp(36px,6vw,72px);letter-spacing:-.045em;line-height:.98;margin:0 0 28px;font-weight:600;max-width:900px;text-wrap:balance}
.contact{display:flex;flex-wrap:wrap;gap:16px}
.ct{display:block;background:#fff;color:#0b1117;text-decoration:none;border-radius:18px;padding:18px 26px;min-width:0;max-width:100%}
.ct span{display:block;font-size:14px;color:#5d6671;margin-bottom:4px;letter-spacing:.02em}
.ct b{display:block;font-size:clamp(20px,3vw,28px);font-weight:600;letter-spacing:-.03em;overflow-wrap:anywhere;user-select:all}
.ct:hover{opacity:.9}

footer{background:var(--foot);color:var(--foot-fg);padding-block:56px 40px}
footer .wrap{display:flex;flex-wrap:wrap;gap:30px;justify-content:space-between}
footer small{color:var(--foot-mute);display:block;margin-top:10px;max-width:420px}
footer a{display:block;text-decoration:none;color:var(--foot-link);margin-bottom:6px;font-size:16px}
@media (max-width:520px){.kpi{padding:18px 16px}.kpi b{font-size:40px}.kpi span{font-size:15px}.kpi em{font-size:13px}.viz{padding:20px 16px 14px}.byst{padding:20px 16px}}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.tip{transition:none}}