/* Alvatech — feuille commune. Blanc, Instrument Sans, filets fins, accent ambre.
   Référence : docs/design/hero-maquette.html et docs/superpowers/specs/2026-10-19-refonte-visuelle-design.md. */
:root {
  --bg: #FFFFFF; --ink: #121417; --ink-2: #5A606B; --line: #E3E5E9; --line-2: #C8CCD3;
  --amber: #D97706; --amber-ink: #9A4D00; --amber-light: #F4B14A;
  --f: 'Instrument Sans', 'Helvetica Neue', Arial, sans-serif;
  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  color-scheme: light;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 17px/1.5 var(--f); }
h1, h2, h3, h4, p, ul, ol, figure { margin: 0; }
img { max-width: 100%; height: auto; }
a { color: inherit; }
a:focus-visible, button:focus-visible, summary:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--amber); outline-offset: 4px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.wrap { max-width: 1240px; margin: 0 auto;
  padding-left: max(20px, env(safe-area-inset-left, 0px)); padding-right: max(20px, env(safe-area-inset-right, 0px)); }

/* ——— Typographie ——— */
h1, h2, h3 { font-weight: 500; letter-spacing: -0.03em; text-wrap: balance; }
.page-head { padding-block: clamp(40px, 7vw, 96px) clamp(32px, 5vw, 64px); display: grid; gap: 20px; }
.page-head h1 { font-size: clamp(36px, 5.4vw, 72px); line-height: 1.02; max-width: 16ch; }
.page-head .group { padding: 0; }
.lede { font-size: clamp(18px, 1.6vw, 21px); color: var(--ink-2); max-width: 44ch; }
.measure { max-width: 60ch; }
.measure p + p, .measure ul + p, .measure p + ul { margin-top: 1em; }
.section { border-top: 1px solid var(--line); }
.section > .wrap { padding-block: clamp(48px, 7vw, 96px); display: grid; gap: 28px; }
.section h2 { font-size: clamp(30px, 3.6vw, 48px); line-height: 1.05; max-width: 20ch; }
.section h3 { font-size: clamp(22px, 2.4vw, 30px); letter-spacing: -0.025em; line-height: 1.15; }
.section h3.group { font-size: 15px; letter-spacing: 0; line-height: 1.5; }
.split { display: grid; gap: 36px; }
@media (min-width: 860px) { .split { grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr); gap: 64px; } }
.split .side p { margin-top: 18px; color: var(--ink-2); max-width: 40ch; }

/* ——— Lien d'action ——— */
.link { display: inline-block; font-size: 17px; font-weight: 500; text-decoration: none; padding-bottom: 10px;
  border-bottom: 2px solid var(--amber); transition: border-color 160ms ease, color 160ms ease; }
.links { display: flex; flex-wrap: wrap; gap: 14px 36px; align-items: baseline; }
.links .tel { color: var(--ink-2); font-variant-numeric: tabular-nums; }
.links .tel a { text-decoration: none; }

/* ——— Liste sommaire ——— */
.list { list-style: none; margin: 0; padding: 0; }
.list li { border-top: 1px solid var(--line); }
.list li:last-child { border-bottom: 1px solid var(--line); }
.list li.head { border-top: 0; }
.list li.head + li { border-top: 1px solid var(--line); }
.list .group { display: block; padding: 10px 0 14px; font-size: 15px; font-weight: 500; color: var(--amber-ink); }
.list a, .list .row { display: grid; gap: 4px; padding: 22px 0; text-decoration: none; }
@media (min-width: 640px) { .list a, .list .row { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 20px; align-items: baseline; } }
.list strong { font-weight: 500; font-size: clamp(22px, 2.4vw, 30px); letter-spacing: -0.025em; line-height: 1.1; }
.list span { color: var(--ink-2); }
.list li.plain { padding: 18px 0; }
.list li.plain strong { display: block; font-size: 19px; letter-spacing: -0.015em; margin-bottom: 4px; }
.group { font-size: 15px; font-weight: 500; color: var(--amber-ink); }

/* ——— Formats et preuve ——— */
.formats-door { padding: 10px 0 14px; }
.formats + .formats-door { margin-top: 24px; }
.proof .wrap { display: grid; gap: 20px; }
.proof-rows .proof-cols { display: grid; grid-template-columns: minmax(0, 1fr) 80px 80px; gap: 16px; align-items: baseline; }
.proof-rows li.head .proof-cols { padding: 0 0 10px; font-size: 14px; color: var(--ink-2); }
.proof-rows li.row { padding: 16px 0; display: block; }
.proof-rows li.row strong { font-size: 19px; letter-spacing: -0.015em; }
.proof-rows .before { color: var(--ink-2); font-variant-numeric: tabular-nums; text-decoration: line-through; }
.proof-rows li.row b { font-weight: 500; color: var(--amber-ink); font-variant-numeric: tabular-nums; }
.proof-total { font-size: clamp(19px, 2vw, 24px); color: var(--ink-2); }
.proof-total strong { color: var(--ink); font-weight: 500; }

/* ——— FAQ ——— */
.faq details { border-top: 1px solid var(--line); }
.faq details:last-child { border-bottom: 1px solid var(--line); }
.faq summary { display: flex; justify-content: space-between; gap: 24px; align-items: center; cursor: pointer; list-style: none;
  padding: 20px 0; font-size: clamp(19px, 2vw, 24px); font-weight: 500; letter-spacing: -0.02em; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: ''; flex: none; width: 14px; height: 14px;
  background: linear-gradient(var(--ink), var(--ink)) center / 14px 2px no-repeat, linear-gradient(var(--ink), var(--ink)) center / 2px 14px no-repeat;
  transition: transform 160ms var(--ease-out); }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { padding: 0 0 22px; color: var(--ink-2); max-width: 60ch; }

/* ——— Formulaire ——— */
.form { display: grid; gap: 22px; }
.form-row { display: grid; gap: 22px; }
@media (min-width: 640px) { .form-row { grid-template-columns: 1fr 1fr; } }
.form-group { display: grid; gap: 8px; }
.form-label { font-size: 15px; font-weight: 500; }
.form-opt { color: var(--ink-2); font-weight: 400; }
.field { width: 100%; font: inherit; color: var(--ink); background: var(--bg); border: 0; border-bottom: 1px solid var(--line-2); border-radius: 0;
  padding: 10px 0; transition: border-color 160ms ease; }
.field:focus { outline: none; border-bottom: 2px solid var(--amber); padding-bottom: 9px; }
.field::placeholder { color: #9AA0AA; }
textarea.field { resize: vertical; min-height: 110px; }
.select { position: relative; }
.select .field { appearance: none; -webkit-appearance: none; padding-right: 28px; cursor: pointer; }
.select::after { content: ''; position: absolute; right: 4px; top: 50%; width: 9px; height: 9px; margin-top: -7px; pointer-events: none;
  border-right: 1.6px solid var(--ink); border-bottom: 1.6px solid var(--ink); transform: rotate(45deg); }
.submit { display: inline-flex; align-items: center; justify-content: center; gap: 10px; font: inherit; font-weight: 600; color: var(--ink);
  background: var(--amber); border: 0; border-radius: 0; padding: 16px 26px; cursor: pointer; justify-self: start;
  transition: transform 160ms var(--ease-out), background-color 160ms ease; }
.submit:active { transform: scale(0.97); }
.submit:disabled { background: var(--line); color: var(--ink-2); cursor: default; }

/* ——— Navigation ——— */
nav.top { background: var(--bg); position: relative; z-index: 5; }
[data-nav].is-open nav.top { z-index: 30; }
.nav-row { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; min-height: 80px; gap: 20px; }
.brand { display: block; line-height: 0; }
.brand img { height: 30px; width: auto; }
.nav-links { justify-self: center; display: flex; gap: 32px; align-items: center; font-size: 16px; }
.nav-links > a { text-decoration: none; }
.nav-cta { justify-self: end; font-size: 16px; text-decoration: none; color: var(--ink-2); }
.nav-toggle { display: none; justify-self: end; font: inherit; font-size: 16px; background: none; border: 0; padding: 8px 0; cursor: pointer; color: var(--ink); }
.nav-menu { position: relative; }
.nav-menu summary { list-style: none; cursor: pointer; }
.nav-menu summary::-webkit-details-marker { display: none; }
.nav-menu-panel { position: absolute; top: calc(100% + 18px); left: 50%; transform: translateX(-50%); width: max-content; min-width: 420px;
  background: var(--bg); border: 1px solid var(--line); padding: 24px 28px 22px; display: grid; grid-template-columns: 1fr 1fr; gap: 18px 40px; }
.nav-menu-col { display: grid; gap: 10px; }
.nav-menu-col a { text-decoration: none; }
.nav-menu-all { grid-column: 1 / -1; padding-top: 16px; border-top: 1px solid var(--line); font-size: 15px; color: var(--ink-2); text-decoration: none; }
.nav-drawer { display: none; position: fixed; inset: 0; background: var(--bg); z-index: 20; overflow: auto; }
[data-nav].is-open .nav-drawer { display: block; }
body.nav-locked { overflow: hidden; }
.nav-drawer-inner { padding-block: 92px 40px; display: grid; gap: 32px; }
.nav-drawer-list { list-style: none; margin: 0; padding: 0; }
.nav-drawer-list > li { border-top: 1px solid var(--line); }
.nav-drawer-list > li:last-child { border-bottom: 1px solid var(--line); }
.nav-drawer-list > li > a { display: block; padding: 18px 0; font-size: 28px; font-weight: 500; letter-spacing: -0.025em; text-decoration: none; }
.nav-drawer-sub { list-style: none; margin: 0; padding: 0 0 18px; display: grid; gap: 10px; }
.nav-drawer-sub a { text-decoration: none; color: var(--ink-2); }
.nav-drawer-foot { display: flex; gap: 20px; font-size: 14px; color: var(--ink-2); }
.nav-drawer-foot a { text-decoration: none; }
@media (max-width: 720px) {
  .nav-row { grid-template-columns: 1fr auto; min-height: 68px; }
  .nav-links, .nav-cta { display: none; }
  .nav-toggle { display: block; }
  .brand img { height: 26px; }
}

/* ——— Pied de page noir ——— */
footer.end { background: var(--ink); color: #FFFFFF; }
footer.end .wrap { padding-block: clamp(56px, 8vw, 112px) 36px; display: grid; gap: 32px; }
footer.end h2 { font-size: clamp(32px, 4.6vw, 60px); line-height: 1.04; max-width: 18ch; }
footer.end .link { border-bottom-color: #FFFFFF; }
footer.end a:focus-visible { outline-color: var(--amber-light); }
.coords { display: grid; gap: 6px; color: #A6ABB5; }
.coords b { font-weight: 500; color: #FFFFFF; }
.coords a { color: #FFFFFF; text-decoration: none; }
.footer-logo { display: block; margin-top: clamp(24px, 6vw, 72px); line-height: 0; }
.footer-logo img { width: min(100%, 720px); height: auto; }
.foot { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px 24px; padding-top: 28px; border-top: 1px solid #2C3038; font-size: 14px; color: #A6ABB5; }
.foot nav { display: flex; flex-wrap: wrap; gap: 10px 18px; }
.foot a { text-decoration: none; }

/* ——— Survol, mouvement réduit ——— */
@media (hover: hover) and (pointer: fine) {
  .link:hover { color: var(--amber-ink); border-color: var(--amber-ink); }
  footer.end .link:hover { color: var(--amber-light); border-color: var(--amber-light); }
  .list a:hover strong { color: var(--amber-ink); }
  .foot a:hover, .coords a:hover { color: var(--amber-light); }
  .nav-links > a:hover, .nav-menu summary:hover, .nav-cta:hover, .nav-menu-col a:hover, .nav-menu-all:hover { color: var(--amber-ink); }
}
@media (prefers-reduced-motion: reduce) {
  .link, .submit, .faq summary::after, .field { transition: none; }
}