:root {
  color-scheme: dark;
  --ink: #eaf6ed;
  --muted: #9fb6b0;
  --deep: #071619;
  --panel: #10282d;
  --panel-2: #17383b;
  --line: rgba(193, 231, 208, .16);
  --mint: #93e1bd;
  --mint-strong: #baf1cc;
  --amber: #e0ac5f;
  --danger: #ff9b8c;
  --radius: 18px;
  --shadow: 0 24px 80px rgba(0, 0, 0, .36);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html { background: var(--deep); }

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 72% 42%, rgba(45, 124, 104, .17), transparent 34rem),
    radial-gradient(circle at 15% 0%, rgba(224, 172, 95, .08), transparent 28rem),
    linear-gradient(135deg, #061316 0%, #0b2024 100%);
}

button, input { font: inherit; }
button { cursor: pointer; }

.skip-link {
  position: fixed; left: 1rem; top: -4rem; z-index: 100;
  padding: .75rem 1rem; color: #071619; background: var(--mint);
}
.skip-link:focus { top: 1rem; }

.page-shell { width: min(1440px, 100%); min-height: 100vh; margin: auto; padding: 0 clamp(1.25rem, 5vw, 5rem); display: flex; flex-direction: column; }
.topbar { height: 104px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); }
.brand { display: flex; gap: .8rem; align-items: center; color: var(--ink); text-decoration: none; border-radius: 12px; }
.brand:focus-visible { outline: 2px solid var(--mint); outline-offset: 4px; }
/* UX-016 : logo « plaque » (PNG transparent + WebP), hauteur fixe, largeur proportionnelle (3,23:1). */
.brand-logo { display: block; line-height: 0; }
.brand-logo img { display: block; height: 72px; width: auto; max-width: 100%; filter: drop-shadow(0 6px 14px rgba(0,0,0,.35)); }
@media (max-width: 420px) { .brand-logo img { height: 44px; } }
.lot-badge { color: var(--muted); font-size: .72rem; text-transform: uppercase; letter-spacing: .13em; }

.landing { flex: 1; min-height: 670px; display: grid; grid-template-columns: minmax(0, .9fr) minmax(460px, 1.1fr); align-items: center; gap: 4rem; padding: 4rem 0; }
.hero { position: relative; z-index: 3; max-width: 670px; }
.eyebrow { margin: 0 0 1.6rem; color: var(--amber); font-size: .72rem; font-weight: 750; letter-spacing: .22em; text-transform: uppercase; }
h1 { margin: 0; font-family: Georgia, "Times New Roman", serif; font-size: clamp(3.5rem, 6.6vw, 7.2rem); font-weight: 400; line-height: .91; letter-spacing: -.055em; }
h1 span { color: var(--mint); }
.hero-copy { max-width: 590px; margin: 2rem 0; color: var(--muted); font-size: clamp(1rem, 1.35vw, 1.2rem); line-height: 1.72; }
.actions { display: flex; flex-wrap: wrap; gap: .75rem; align-items: center; }
.button { min-height: 52px; border: 1px solid transparent; border-radius: 4px; padding: 0 1.25rem; display: inline-flex; align-items: center; justify-content: center; gap: 1.4rem; font-weight: 760; letter-spacing: .01em; transition: transform .18s ease, background .18s ease, border-color .18s ease; }
.button:hover { transform: translateY(-2px); }
.button:focus-visible, .text-button:focus-visible, input:focus-visible { outline: 3px solid var(--mint); outline-offset: 3px; }
.button-primary { color: #092119; background: var(--mint-strong); }
.button-primary:hover { background: #d2f7dc; }
.button-secondary { color: var(--ink); background: rgba(255,255,255,.04); border-color: var(--line); }
.button-compact { min-height: 46px; color: #092119; background: var(--mint); }
.text-button { border: 0; padding: .75rem; color: var(--mint); background: transparent; text-decoration: underline; text-underline-offset: .3em; }
.button[disabled] { opacity: .55; cursor: wait; transform: none; }

.recovery-panel { max-width: 560px; margin-top: 1.5rem; padding: 1.25rem; border: 1px solid var(--line); border-radius: 8px; background: rgba(12, 35, 38, .72); }
.recovery-panel label { display: block; margin-bottom: .6rem; font-size: .84rem; font-weight: 720; }
.field-row { display: grid; grid-template-columns: 1fr auto; gap: .6rem; }
input { width: 100%; min-height: 46px; border: 1px solid rgba(186, 241, 204, .28); border-radius: 4px; padding: 0 1rem; color: var(--ink); background: rgba(0,0,0,.2); letter-spacing: .08em; text-transform: uppercase; }
.field-hint { margin: .6rem 0 0; color: var(--muted); font-size: .78rem; }
.status { min-height: 1.5rem; margin-top: 1rem; color: var(--mint); font-size: .88rem; }
.status.error { color: var(--danger); }

.visual { position: relative; min-height: 580px; display: grid; place-items: center; perspective: 1000px; overflow: hidden; }
.island { position: relative; width: min(540px, 40vw); aspect-ratio: 1.1; transform: rotateX(58deg) rotateZ(-42deg); filter: drop-shadow(0 44px 44px rgba(0,0,0,.44)); }
.grid-plane { position: absolute; inset: 2%; border: 1px solid rgba(147,225,189,.25); background: linear-gradient(90deg, rgba(147,225,189,.09) 1px, transparent 1px), linear-gradient(rgba(147,225,189,.09) 1px, transparent 1px), linear-gradient(135deg, #16383a, #0d262a); background-size: 12.5% 12.5%; box-shadow: inset 0 0 80px rgba(3,14,15,.55); clip-path: polygon(15% 0, 100% 15%, 88% 100%, 0 84%); }
.building { position: absolute; z-index: 2; background: #173d3d; border: 1px solid rgba(186,241,204,.28); box-shadow: -16px 20px 0 #092326, -17px 21px 0 rgba(147,225,189,.2), 0 0 28px rgba(147,225,189,.13); transform: translateZ(54px); }
.building span { position: absolute; inset: 15%; border: 1px solid rgba(224,172,95,.55); background: repeating-linear-gradient(90deg, rgba(224,172,95,.15) 0 7px, transparent 7px 14px); }
.building i { position: absolute; width: 15%; height: 135%; bottom: 0; left: 18%; border: 1px solid rgba(147,225,189,.4); background: #102d31; transform: translateZ(20px); }
.building-main { width: 32%; height: 29%; left: 38%; top: 31%; }
.building-small { width: 18%; height: 16%; left: 17%; top: 51%; box-shadow: -10px 13px 0 #092326; }
.building-tower { width: 17%; height: 34%; right: 14%; top: 49%; }
.building b { position: absolute; width: 7px; height: 7px; right: 15%; top: 22%; border-radius: 50%; background: var(--mint); box-shadow: 0 0 12px var(--mint); }
.route { position: absolute; height: 3px; z-index: 1; background: var(--amber); box-shadow: 0 0 12px rgba(224,172,95,.8); transform-origin: left center; }
.route-a { width: 32%; left: 31%; top: 59%; transform: rotate(-12deg); }
.route-b { width: 29%; left: 58%; top: 55%; transform: rotate(62deg); }
.signal { position: absolute; z-index: 4; width: 9px; height: 9px; border-radius: 50%; background: var(--mint-strong); box-shadow: 0 0 0 8px rgba(147,225,189,.08), 0 0 22px var(--mint); animation: pulse 2.2s ease-in-out infinite; }
.signal-a { left: 30%; top: 49%; }.signal-b { right: 15%; top: 48%; animation-delay: -1.1s; }
.orbital { position: absolute; width: 80%; aspect-ratio: 1; border: 1px solid rgba(147,225,189,.08); border-radius: 50%; transform: rotateX(66deg); }
.orbital-two { width: 55%; border-color: rgba(224,172,95,.1); }
.visual-caption { position: absolute; right: 4%; bottom: 6%; margin: 0; color: var(--muted); font-size: .68rem; letter-spacing: .16em; text-transform: uppercase; }
.visual-caption span { display: inline-block; width: 6px; height: 6px; margin-right: .5rem; border-radius: 50%; background: var(--mint); box-shadow: 0 0 8px var(--mint); }
@keyframes pulse { 50% { opacity: .45; transform: scale(.7); } }

.footer { min-height: 72px; display: flex; justify-content: space-between; align-items: center; gap: 1rem; border-top: 1px solid var(--line); color: var(--muted); font-size: .72rem; letter-spacing: .04em; }
.license-link { min-height: 44px; display: inline-flex; align-items: center; justify-content: center; gap: .65rem; max-width: 42rem; padding: .4rem .65rem; border: 1px solid #17383b; border-radius: 8px; background: #10282d; color: #eaf6ed; text-decoration: none; line-height: 1.4; }
.license-link img { display: block; flex: 0 0 auto; width: auto; height: 31px; }
.license-link:hover { border-color: var(--mint); color: var(--mint); }
.license-link:focus-visible { outline: 3px solid var(--mint); outline-offset: 3px; }
.server-state { white-space: nowrap; }.server-state i { display: inline-block; width: 6px; height: 6px; margin-right: .4rem; border-radius: 50%; background: var(--amber); }
.server-state.ready i { background: var(--mint); box-shadow: 0 0 8px var(--mint); }
.server-state.error i { background: var(--danger); }

dialog { width: min(520px, calc(100% - 2rem)); border: 1px solid rgba(186,241,204,.22); border-radius: var(--radius); padding: 2rem; color: var(--ink); background: #10282d; box-shadow: var(--shadow); text-align: center; }
dialog::backdrop { background: rgba(1, 9, 10, .78); backdrop-filter: blur(5px); }
dialog h2 { margin: .5rem 0; font-family: Georgia, serif; font-size: 2rem; font-weight: 400; }
dialog p { color: var(--muted); line-height: 1.55; }
.dialog-icon { color: var(--amber); font-size: 2.5rem; }
.recovery-key { display: block; margin: 1.5rem 0; padding: 1rem .5rem; border: 1px dashed rgba(147,225,189,.45); border-radius: 7px; color: var(--mint-strong); background: rgba(0,0,0,.16); font-size: clamp(1rem, 5vw, 1.45rem); font-weight: 760; letter-spacing: .08em; }
.dialog-actions { display: flex; justify-content: center; gap: .7rem; flex-wrap: wrap; }

[hidden] { display: none !important; }

@media (max-width: 960px) {
  .landing { grid-template-columns: 1fr; padding-top: 3rem; }
  .hero { max-width: 760px; }
  .visual { min-height: 420px; order: -1; }
  .island { width: min(480px, 75vw); }
  h1 { font-size: clamp(3.5rem, 11vw, 6rem); }
}

@media (max-width: 600px) {
  .page-shell { padding: 0 1rem; }
  .topbar { height: 84px; }.lot-badge { display: none; }
  .landing { gap: 1rem; padding: 1.5rem 0 3rem; }
  .visual { min-height: 285px; }.island { width: 82vw; }
  .visual-caption { bottom: 1%; }
  .actions, .actions .button { width: 100%; }
  .text-button { margin: auto; }
  .field-row { grid-template-columns: 1fr; }
  .footer { padding: 1rem 0; flex-direction: column; align-items: flex-start; }
  .license-link { width: 100%; justify-content: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}

@media (prefers-contrast: more) {
  :root { --muted: #c8dad4; --line: rgba(237,248,239,.42); }
  .button, input, dialog, .recovery-panel { border-width: 2px; }
}

@media (forced-colors: active) {
  .orbital { display: none; }
  .building, .brand-logo img, .signal { forced-color-adjust: auto; }
}

/* UX-006 — centre cumulatif validé sur l’accueil. */
.home-cumulative-visual {
  display: block;
  width: min(100%, 760px);
  height: min(580px, 46vw);
  min-height: 420px;
  border: 1px solid var(--line);
  border-radius: 18px;
  object-fit: cover;
  object-position: center;
  box-shadow: 0 32px 70px rgba(0, 0, 0, .42);
}

@media (max-width: 960px) {
  .home-cumulative-visual { width: min(760px, 100%); height: 420px; min-height: 0; }
}

@media (max-width: 600px) {
  .home-cumulative-visual { height: 285px; border-radius: 12px; }
}