/* Le site de présentation du logiciel de schémas (maquette validée le 30/10). */
:root {
  --back: #F4F6FB; --panel: #FFFFFF; --card: #FFFFFF; --line: #E2E6EF; --text: #141A2A; --muted: #4A5468; --faint: #6B7489;
  --accent: #2563EB; --accent2: #19B6C9; --soft: #E8EFFD; --go: #0F7A4C; --gosoft: #E2F5EC; --warn: #9A5806; --warnsoft: #FFF3DD;
  --bad: #B42318; --badsoft: #FDECEA;
  --shadow: 0 10px 30px rgba(20, 30, 60, .08);
  color-scheme: light;
}
:root[data-theme="dark"] {
  --back: #0E1320; --panel: #151B2B; --card: #1A2133; --line: #2A3349; --text: #EEF2FA; --muted: #B4BDD0; --faint: #8F9AB2;
  --accent: #5B8DF8; --accent2: #2BC8DA; --soft: #1D2B4A; --go: #3CCB8C; --gosoft: #15332A; --warn: #F2B154; --warnsoft: #3A2C14;
  --bad: #FF8A80; --badsoft: #3A1A1A;
  --shadow: 0 10px 30px rgba(0, 0, 0, .35);
  color-scheme: dark;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body { overflow-x: hidden; }
body { margin: 0; font-family: Inter, "Segoe UI", system-ui, sans-serif; background: var(--back); color: var(--text); line-height: 1.6; font-size: 17px; }
a { color: var(--accent); }
img { max-width: 100%; }
.wrap { max-width: 1180px; margin: 0 auto; padding: 0 24px; }
.sr { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

/* La barre du haut */
header.top { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--panel) 90%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
header.top .wrap { display: flex; align-items: center; gap: 22px; height: 68px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 18px; color: var(--text); text-decoration: none; }
.logo i { width: 34px; height: 34px; border-radius: 10px; background: linear-gradient(135deg, #2563EB, #19B6C9); color: #fff; display: grid; place-items: center; font-style: normal; font-size: 16px; }
.chip { font-size: 11.5px; font-weight: 700; padding: 3px 9px; border-radius: 99px; background: var(--warnsoft); color: var(--warn); }
nav.menu { display: flex; gap: 22px; margin-left: auto; }
nav.menu a { color: var(--muted); text-decoration: none; font-weight: 500; font-size: 15px; }
nav.menu a:hover { color: var(--text); }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 20px; border-radius: 12px; font-weight: 700; font-size: 15.5px; text-decoration: none; border: 1px solid var(--line); background: var(--card); color: var(--text); cursor: pointer; font-family: inherit; }
.btn.primary { background: linear-gradient(135deg, #2563EB, #1A8FD8); color: #fff; border: 0; box-shadow: inset 0 1px 0 rgba(255,255,255,.25), inset 0 -2px 0 rgba(0,0,0,.18); }
.btn:focus-visible, .theme:focus-visible, .tabs button:focus-visible { outline: 3px solid var(--accent2); outline-offset: 2px; }
.theme { border: 1px solid var(--line); background: var(--card); color: var(--text); border-radius: 10px; padding: 7px 11px; cursor: pointer; font-size: 15px; }

/* Le haut de page */
.hero { padding: 70px 0 40px; text-align: center; }
.hero .tag { display: inline-block; font-weight: 600; font-size: 14px; color: var(--accent); background: var(--soft); padding: 6px 14px; border-radius: 99px; margin-bottom: 20px; }
.hero h1 { font-size: 52px; line-height: 1.12; margin: 0 auto 18px; max-width: 880px; letter-spacing: -1px; }
.hero h1 span { background: linear-gradient(90deg, var(--accent), var(--accent2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p { font-size: 20px; color: var(--muted); max-width: 720px; margin: 0 auto 30px; }
.hero .cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.hero small { display: block; margin-top: 14px; color: var(--faint); font-size: 14px; }
.shot { margin: 48px auto 0; max-width: 1100px; border-radius: 16px; overflow: hidden; border: 1px solid var(--line); box-shadow: var(--shadow); background: var(--panel); }
.shot img { display: block; width: 100%; height: auto; }

/* Les sections */
section { padding: 70px 0; }
section h2 { font-size: 36px; margin: 0 0 10px; letter-spacing: -.5px; text-align: center; }
section .intro { color: var(--muted); text-align: center; max-width: 700px; margin: 0 auto 40px; font-size: 18px; }
.band { background: var(--panel); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 24px; }
.card .ico { width: 46px; height: 46px; border-radius: 12px; background: var(--soft); color: var(--accent); display: grid; place-items: center; font-size: 22px; margin-bottom: 14px; }
.card h3 { margin: 0 0 6px; font-size: 19px; }
.card p { margin: 0; color: var(--muted); font-size: 15.5px; }

/* Pour les écoles */
.school { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
.school ul { list-style: none; padding: 0; margin: 20px 0 0; }
.school li { padding: 10px 0 10px 34px; position: relative; color: var(--muted); }
.school li::before { content: "✓"; position: absolute; left: 0; top: 9px; width: 22px; height: 22px; border-radius: 50%; background: var(--gosoft); color: var(--go); font-weight: 800; font-size: 13px; display: grid; place-items: center; }
.school li b { color: var(--text); }
.school h2 { text-align: left; }
.school .shot { margin: 0; }

/* Les images à onglets */
.tabs { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; margin-bottom: 22px; }
.tabs button { border: 1px solid var(--line); background: var(--card); color: var(--muted); padding: 9px 16px; border-radius: 99px; font: 600 14.5px Inter, "Segoe UI", sans-serif; cursor: pointer; }
.tabs button[aria-selected="true"] { background: var(--accent); color: #fff; border-color: var(--accent); }
.legend { text-align: center; color: var(--muted); margin-top: 16px; font-size: 15.5px; }

/* Les étapes */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; counter-reset: s; }
.steps .card { position: relative; padding-top: 30px; }
.steps .card::before { counter-increment: s; content: counter(s); position: absolute; top: -16px; left: 24px; width: 34px; height: 34px; border-radius: 50%; background: linear-gradient(135deg, #2563EB, #19B6C9); color: #fff; font-weight: 800; display: grid; place-items: center; }

/* Où en est le logiciel */
.road { max-width: 760px; margin: 0 auto; }
.road .row { display: flex; gap: 16px; align-items: flex-start; padding: 16px 20px; border: 1px solid var(--line); background: var(--card); border-radius: 14px; margin-bottom: 10px; }
.road .st { flex: none; font-size: 12.5px; font-weight: 700; padding: 4px 10px; border-radius: 99px; margin-top: 2px; min-width: 96px; text-align: center; }
.st.done { background: var(--gosoft); color: var(--go); }
.st.now { background: var(--soft); color: var(--accent); }
.st.next { background: var(--back); color: var(--faint); border: 1px solid var(--line); }
.road b { display: block; }
.road span.d { color: var(--muted); font-size: 15px; }

/* Prévenez-moi */
.notify { background: linear-gradient(135deg, #1E3A8A, #0E7490); color: #fff; border-radius: 22px; padding: 48px; display: grid; grid-template-columns: 1.1fr 1fr; gap: 36px; align-items: center; }
.notify h2 { color: #fff; text-align: left; }
.notify p { color: #D6E4FF; margin: 0; }
.notify form { background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.2); border-radius: 16px; padding: 22px; }
.notify label { display: block; font-weight: 600; font-size: 14px; margin: 0 0 6px; }
.notify input, .notify select { width: 100%; padding: 12px 14px; border-radius: 10px; border: 2px solid transparent; font: 15.5px Inter, "Segoe UI", sans-serif; margin-bottom: 14px; color: #141A2A; background: #fff; }
.notify input[aria-invalid="true"] { border-color: #FF8A80; }
.notify .small { font-size: 13px; color: #C2D3F5; margin-top: 10px; }
.notify .small a { color: #fff; }
.msg { border-radius: 12px; padding: 12px 14px; font-weight: 600; font-size: 15px; margin: 0 0 14px; display: flex; gap: 10px; align-items: flex-start; }
.msg.ok { background: #E2F5EC; color: #0B6B42; }
.msg.bad { background: #FDECEA; color: #8A1C12; }

/* Questions */
details { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 16px 20px; margin: 0 auto 10px; max-width: 800px; }
summary { font-weight: 700; cursor: pointer; }
details p { color: var(--muted); margin: 10px 0 0; }

footer.bottom { border-top: 1px solid var(--line); padding: 30px 0; color: var(--faint); font-size: 14px; }
footer.bottom .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
footer.bottom a { color: var(--muted); margin-left: 16px; }
footer.bottom a:first-child { margin-left: 0; }

/* Pages simples (légales, désinscription, erreurs) */
.page { max-width: 820px; margin: 0 auto; padding: 48px 24px 60px; }
.page .card { display: grid; gap: 14px; padding: 32px; font-size: 16px; }
.page h1 { margin: 0; font-size: 28px; }
.page h2 { margin: 10px 0 0; font-size: 19px; }
.page p, .page ul { margin: 0; color: var(--muted); }
.page ul { padding-left: 22px; display: grid; gap: 6px; }
.page small { color: var(--faint); }
.page .big { font-size: 54px; line-height: 1; margin: 0 0 4px; }

@media (max-width: 900px) {
  nav.menu { display: none; }
  .hero { padding-top: 44px; }
  .hero h1 { font-size: 36px; }
  .hero p { font-size: 18px; }
  .grid3, .steps, .school, .notify { grid-template-columns: 1fr; }
  .notify { padding: 28px; }
  .wrap { padding: 0 16px; }
  header.top .wrap { gap: 10px; }
  header.top .chip { display: none; }
  header.top .btn.primary { padding: 9px 12px; font-size: 14px; }
  .theme { margin-left: auto; }
  section { padding: 50px 0; }
  section h2 { font-size: 28px; }
  .notify h2 { font-size: 26px; }
  .page { padding: 28px 16px 40px; }
  .page .card { padding: 22px; }
}