/* atomique.xyz — thème noir / blanc / gris, surfaces en verre comme dans Atomique Hub */
:root {
  --bg: #0a0a0a;
  --bg-2: #131313;
  --ink: #f5f5f5;
  --ink-2: #b4b4b4;
  --ink-3: #7c7c7c;
  --line: rgba(255, 255, 255, .10);
  --glass: rgba(255, 255, 255, .045);
  --glass-hi: rgba(255, 255, 255, .08);
  --radius: 22px;
  --font: "Segoe UI Variable Text", "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --font-title: "Segoe UI Variable Display", "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --ease: cubic-bezier(.22, .9, .28, 1);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  min-height: 100vh; font-family: var(--font); color: var(--ink); line-height: 1.55;
  background:
    radial-gradient(60% 45% at 20% 0%, #262626 0%, transparent 70%),
    radial-gradient(50% 40% at 90% 30%, #1b1b1b 0%, transparent 70%),
    var(--bg);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.wrap { width: min(1120px, 100% - 40px); margin: 0 auto; }

/* ---------- Navigation ---------- */
.nav { position: sticky; top: 0; z-index: 20; backdrop-filter: blur(18px); background: rgba(10, 10, 10, .72); border-bottom: 1px solid var(--line); }
.nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--font-title); font-weight: 700; font-size: 17px; letter-spacing: -.2px; }
.brand img { width: 30px; height: 30px; }
.brand .dim { color: var(--ink-3); }
.nav nav { display: flex; align-items: center; gap: 22px; font-size: 14px; color: var(--ink-2); }
.nav nav a:not(.btn):hover { color: var(--ink); }

/* ---------- Boutons ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; height: 50px; padding: 0 24px; border-radius: 14px; font-weight: 700; font-size: 15px; border: 1px solid transparent; transition: transform .15s var(--ease), background .2s, border-color .2s, box-shadow .2s; cursor: pointer; white-space: nowrap; }
.btn:active { transform: scale(.97); }
.btn-light { background: #f2f2f2; color: #0b0b0b; box-shadow: 0 10px 30px rgba(255, 255, 255, .08); }
.btn-light:hover { background: #fff; box-shadow: 0 12px 36px rgba(255, 255, 255, .16); transform: translateY(-1px); }
.btn-ghost { background: var(--glass); border-color: var(--line); color: var(--ink); }
.btn-ghost:hover { background: var(--glass-hi); border-color: rgba(255, 255, 255, .2); }
.btn-sm { height: 38px; padding: 0 16px; border-radius: 11px; font-size: 13.5px; }
.btn svg { flex-shrink: 0; }

/* ---------- Accueil ---------- */
.hero { padding: 84px 0 40px; text-align: center; }
.pill { display: inline-flex; align-items: center; gap: 9px; padding: 7px 14px 7px 12px; border-radius: 999px; border: 1px solid var(--line); background: var(--glass); font-size: 13px; color: var(--ink-2); transition: border-color .2s, color .2s; }
.pill:hover { border-color: rgba(255, 255, 255, .22); color: var(--ink); }
.pill .dot { width: 7px; height: 7px; border-radius: 50%; background: #e8e8e8; box-shadow: 0 0 10px rgba(255, 255, 255, .7); }
.pill .arrow { color: var(--ink-3); }
h1 { font-family: var(--font-title); font-size: clamp(44px, 8vw, 84px); line-height: 1.02; letter-spacing: -2.4px; margin: 26px 0 0; font-weight: 700; }
h1 .grad { background: linear-gradient(180deg, #d6d6d6 0%, #6e6e6e 100%); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lead { max-width: 620px; margin: 22px auto 0; font-size: clamp(16px, 2.1vw, 19px); color: var(--ink-2); }
.cta { display: flex; justify-content: center; gap: 12px; margin-top: 34px; flex-wrap: wrap; }
.meta { margin-top: 16px; font-size: 13px; color: var(--ink-3); }
.shot { margin: 56px auto 0; border-radius: 26px; overflow: hidden; border: 1px solid var(--line); box-shadow: 0 40px 120px rgba(0, 0, 0, .75), 0 0 0 1px rgba(255, 255, 255, .03); background: #0c0c0c; }
.shot img { width: 100%; height: auto; }
.shot-hero { max-width: 1040px; }

/* ---------- Sections ---------- */
.section { padding: 96px 0 20px; }
.section > .wrap > h2, .section h2 { font-family: var(--font-title); font-size: clamp(30px, 4.4vw, 46px); letter-spacing: -1.2px; line-height: 1.08; font-weight: 700; }
.sub { margin-top: 12px; color: var(--ink-2); font-size: 17px; max-width: 560px; }
.center { text-align: center; }
.center .sub { margin-left: auto; margin-right: auto; }

.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 40px; }
.card { background: var(--glass); border: 1px solid var(--line); border-radius: var(--radius); }
.feature { padding: 24px; transition: background .25s, border-color .25s, transform .25s var(--ease); }
.feature:hover { background: var(--glass-hi); border-color: rgba(255, 255, 255, .16); transform: translateY(-3px); }
.feature .ic { width: 44px; height: 44px; border-radius: 13px; background: #f2f2f2; color: #0b0b0b; display: flex; align-items: center; justify-content: center; margin-bottom: 18px; }
.feature h3 { font-size: 17px; font-weight: 700; letter-spacing: -.2px; }
.feature p { margin-top: 8px; font-size: 14.5px; color: var(--ink-2); }

.split { display: grid; grid-template-columns: 1fr 1.35fr; align-items: center; gap: 56px; margin-top: 70px; }
.split.reverse { grid-template-columns: 1.35fr 1fr; }
.split.reverse .text { order: 2; }
.split .shot { margin: 0; }
.kicker { font-size: 12.5px; font-weight: 800; letter-spacing: 1.6px; text-transform: uppercase; color: var(--ink-3); }
.split h3 { font-family: var(--font-title); font-size: clamp(26px, 3.2vw, 34px); letter-spacing: -.8px; line-height: 1.12; margin-top: 10px; }
.split p { margin-top: 14px; color: var(--ink-2); font-size: 16px; }
.ticks { list-style: none; margin-top: 18px; display: grid; gap: 9px; font-size: 15px; color: var(--ink); }
.ticks li { display: flex; gap: 10px; align-items: flex-start; }
.ticks li::before { content: ""; flex-shrink: 0; width: 18px; height: 18px; margin-top: 3px; border-radius: 50%; background: #e8e8e8 url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23111' stroke-width='3.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 12.5 4 4 8-9'/%3E%3C/svg%3E") center/12px no-repeat; }

.cta-card { margin-top: 20px; padding: 56px 32px; text-align: center; background: radial-gradient(80% 120% at 50% 0%, rgba(255, 255, 255, .09), rgba(255, 255, 255, .02)); }
.cta-card .sub { margin: 14px auto 0; }
.cta-card .cta { margin-top: 28px; }

footer { margin-top: 110px; border-top: 1px solid var(--line); }
footer .wrap { display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 28px 0 40px; font-size: 13.5px; color: var(--ink-3); flex-wrap: wrap; }
footer nav { display: flex; gap: 20px; }
footer a:hover { color: var(--ink); }

/* ---------- Page de téléchargement ---------- */
.dl { min-height: calc(100vh - 64px); display: flex; align-items: center; justify-content: center; padding: 60px 0; }
.dl-card { width: min(620px, 100% - 40px); padding: 44px 40px; text-align: center; }
.dl-card .logo { width: 68px; height: 68px; margin: 0 auto 24px; }
.dl-card h1 { font-size: clamp(32px, 5vw, 44px); letter-spacing: -1.2px; margin: 0; }
.dl-card .lead { margin-top: 14px; font-size: 16.5px; }
.dl-card .cta { margin-top: 26px; }
.steps { list-style: none; counter-reset: s; text-align: left; margin: 34px 0 0; display: grid; gap: 12px; }
.steps li { counter-increment: s; display: flex; gap: 14px; padding: 14px 16px; border-radius: 14px; background: var(--glass); border: 1px solid var(--line); font-size: 14.5px; color: var(--ink-2); }
.steps li::before { content: counter(s); flex-shrink: 0; width: 26px; height: 26px; border-radius: 50%; background: #f2f2f2; color: #0b0b0b; font-weight: 800; font-size: 13px; display: flex; align-items: center; justify-content: center; }
.steps b { color: var(--ink); }
.small { margin-top: 22px; font-size: 12.5px; color: var(--ink-3); }

/* ---------- Petits écrans ---------- */
@media (max-width: 900px) {
  .grid { grid-template-columns: 1fr 1fr; }
  .split, .split.reverse { grid-template-columns: 1fr; gap: 28px; }
  .split.reverse .text { order: 0; }
}
@media (max-width: 620px) {
  .nav nav a:not(.btn) { display: none; }
  .grid { grid-template-columns: 1fr; }
  .hero { padding-top: 56px; }
  .btn { width: 100%; }
  .cta { flex-direction: column; }
  .dl-card { padding: 34px 22px; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; scroll-behavior: auto !important; }
}