:root {
    --cream: #ffffff;
    --cream-2: oklch(97.5% 0.008 85);
    --cream-3: oklch(95.5% 0.01 85);
    --ink: oklch(18% 0.025 250);
    --ink-soft: oklch(40% 0.02 250);
    --ink-mute: oklch(58% 0.015 250);
    --rule: oklch(90% 0.008 85);
    --rule-2: oklch(93% 0.008 85);
    --green: oklch(48% 0.13 152);
    --green-deep: oklch(40% 0.11 152);
    --green-soft: oklch(93% 0.04 152);
    --green-tint: oklch(97% 0.02 152);
    --terra: oklch(60% 0.16 40);
    --shadow-card: 0 1px 2px oklch(28% 0.05 252 / 0.04), 0 12px 34px oklch(28% 0.05 252 / 0.06);
    --shadow-soft: 0 1px 2px oklch(28% 0.05 252 / 0.04), 0 4px 14px oklch(28% 0.05 252 / 0.05);
  }

  html, body { background: var(--cream-2); }
  body { color: var(--ink); font-family: 'Plus Jakarta Sans', sans-serif; -webkit-font-smoothing: antialiased; }
  a { color: var(--green); text-decoration: none; }
  a:hover { color: var(--ink); }
  ::selection { background: var(--green-soft); }

  /* nav override (match site) */
  .site-nav { background: oklch(97.5% 0.008 85 / 0.82) !important; backdrop-filter: blur(18px); border-bottom: 1px solid var(--rule) !important; }
  .nav-logo { color: var(--ink) !important; font-family: 'Bricolage Grotesque', sans-serif; font-weight: 700; letter-spacing: -0.8px; }
  .nav-logo span { color: var(--green) !important; }
  .nav-links a { color: var(--ink-soft) !important; }
  .nav-links a:hover, .nav-links a.active { color: var(--ink) !important; }

  .ret-wrap { max-width: 820px; margin: 0 auto; padding: 128px 32px 120px; }

  .ret-back {
    display: inline-flex; align-items: center; gap: 8px;
    font-size: 13px; font-weight: 600; color: var(--ink-mute); margin-bottom: 30px;
  }
  .ret-back:hover { color: var(--ink); }

  .eyebrow {
    display: inline-flex; align-items: center; gap: 10px;
    font-size: 11px; font-weight: 700; letter-spacing: 1.8px; text-transform: uppercase; color: var(--green);
  }
  .eyebrow::before { content: ''; width: 26px; height: 1px; background: currentColor; opacity: .6; }

  h1 {
    font-family: 'Bricolage Grotesque', sans-serif; font-variation-settings: "wdth" 95;
    font-weight: 800; letter-spacing: -0.04em; line-height: 1.02;
    font-size: clamp(32px, 5vw, 50px); margin-top: 16px; text-wrap: balance;
  }
  h1 em { font-family: 'Newsreader', serif; font-style: italic; font-weight: 500; font-variation-settings: normal; color: var(--green); }

  .ret-lede {
    margin-top: 18px; font-family: 'Newsreader', serif; font-style: italic;
    font-size: 19px; line-height: 1.55; color: var(--ink-soft); max-width: 62ch; text-wrap: pretty;
  }

  /* Info note */
  .ret-note {
    margin: 28px 0 4px; padding: 20px 22px;
    background: var(--green-tint); border: 1px solid var(--green-soft); border-radius: 14px;
    font-size: 14.5px; line-height: 1.6; color: var(--ink-soft);
  }
  .ret-note strong { color: var(--green-deep); font-weight: 700; }

  /* Card */
  .ret-card {
    margin-top: 32px; background: var(--cream); border: 1px solid var(--rule);
    border-radius: 20px; box-shadow: var(--shadow-card); overflow: hidden;
  }
  .ret-card-head {
    padding: 26px 32px; border-bottom: 1px solid var(--rule-2); background: var(--cream-2);
  }
  .ret-card-head h2 {
    font-family: 'Bricolage Grotesque', sans-serif; font-weight: 700; letter-spacing: -0.02em; font-size: 20px;
  }
  .ret-card-head p { margin-top: 6px; font-size: 13.5px; color: var(--ink-mute); }
  .ret-card-body { padding: 30px 32px 34px; }

  .ret-legal-to {
    font-size: 13.5px; line-height: 1.7; color: var(--ink-soft);
    padding: 16px 18px; background: var(--cream-2); border: 1px dashed var(--rule); border-radius: 12px; margin-bottom: 28px;
  }
  .ret-legal-to strong { display: block; color: var(--ink); font-weight: 700; font-size: 14.5px; margin-bottom: 3px; }

  /* Form */
  .fieldset { border: 0; padding: 0; margin: 0 0 26px; }
  .fieldset legend {
    font-size: 11px; font-weight: 700; letter-spacing: 1.4px; text-transform: uppercase;
    color: var(--ink-mute); margin-bottom: 16px; padding: 0;
  }
  .grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px 18px; }
  .field { display: flex; flex-direction: column; gap: 7px; }
  .field.full { grid-column: 1 / -1; }
  .field label { font-size: 13px; font-weight: 600; color: var(--ink); }
  .field label .req { color: var(--terra); margin-left: 2px; }
  .field .hint { font-size: 12px; color: var(--ink-mute); font-weight: 400; }
  .field input, .field textarea, .field select {
    font-family: inherit; font-size: 15px; color: var(--ink);
    padding: 12px 14px; border: 1.5px solid var(--rule); border-radius: 11px; background: var(--cream);
    transition: border-color .15s, box-shadow .15s; width: 100%;
  }
  .field textarea { resize: vertical; min-height: 88px; line-height: 1.55; }
  .field input:focus, .field textarea:focus, .field select:focus {
    outline: none; border-color: var(--green); box-shadow: 0 0 0 3px var(--green-soft);
  }
  .field input.invalid, .field textarea.invalid, .field select.invalid { border-color: var(--terra); }
  .field .err { font-size: 12px; color: var(--terra); font-weight: 600; display: none; }
  .field .err.show { display: block; }

  .radio-row { display: flex; flex-wrap: wrap; gap: 10px; }
  .radio-chip { position: relative; }
  .radio-chip input { position: absolute; opacity: 0; pointer-events: none; }
  .radio-chip span {
    display: inline-flex; align-items: center; gap: 8px; cursor: pointer;
    padding: 11px 18px; border: 1.5px solid var(--rule); border-radius: 100px;
    font-size: 14px; font-weight: 600; color: var(--ink-soft); transition: all .15s;
  }
  .radio-chip input:checked + span { border-color: var(--green); background: var(--green-tint); color: var(--green-deep); }

  .consent { display: flex; gap: 12px; align-items: flex-start; margin-top: 4px; }
  .consent input { width: 18px; height: 18px; margin-top: 2px; accent-color: var(--green); flex-shrink: 0; }
  .consent label { font-size: 13.5px; line-height: 1.55; color: var(--ink-soft); font-weight: 400; }

  .ret-actions { display: flex; align-items: center; gap: 16px; margin-top: 30px; flex-wrap: wrap; }

  .btn-ink {
    background: var(--ink); color: var(--cream);
    padding: 14px 26px; border-radius: 100px; font-size: 14px; font-weight: 600;
    display: inline-flex; align-items: center; justify-content: center; gap: 10px;
    border: none; cursor: pointer; font-family: inherit; transition: transform .2s, background .2s, box-shadow .2s;
  }
  .btn-ink:hover { background: oklch(26% 0.04 250); color: var(--cream); transform: translateY(-1px); box-shadow: 0 10px 24px oklch(18% 0.03 250 / 0.18); }
  .btn-ink .arrow { font-family: 'Newsreader', serif; font-style: italic; font-size: 18px; transition: transform .2s; }
  .btn-ink:hover .arrow { transform: translateX(3px); }
  .btn-ghost {
    background: transparent; color: var(--ink); padding: 12px 22px; border-radius: 100px; border: 1.5px solid var(--ink);
    font-size: 14px; font-weight: 600; display: inline-flex; align-items: center; gap: 10px; cursor: pointer; font-family: inherit;
    transition: background .2s, color .2s;
  }
  .btn-ghost:hover { background: var(--ink); color: var(--cream); }

  /* ─── Accusé de réception ─── */
  .ret-ack { display: none; }
  .ret-ack.show { display: block; }

  .ack-hero { text-align: center; padding: 8px 0 4px; }
  .ack-badge {
    width: 74px; height: 74px; margin: 0 auto 22px; border-radius: 50%;
    background: var(--green-soft); display: grid; place-items: center; animation: pop .5s cubic-bezier(.2,.9,.3,1.4);
  }
  @keyframes pop { from { transform: scale(0); opacity: 0; } to { transform: scale(1); opacity: 1; } }
  .ack-hero h1 { margin-top: 4px; }
  .ack-hero p { margin-top: 16px; font-family: 'Newsreader', serif; font-style: italic; font-size: 19px; color: var(--ink-soft); max-width: 56ch; margin-left: auto; margin-right: auto; text-wrap: pretty; }

  .ack-receipt {
    margin-top: 34px; background: var(--cream); border: 1px solid var(--rule);
    border-radius: 20px; box-shadow: var(--shadow-card); overflow: hidden;
  }
  .ack-stamp {
    padding: 24px 32px; background: var(--ink); color: var(--cream);
    display: flex; justify-content: space-between; align-items: center; gap: 20px; flex-wrap: wrap;
  }
  .ack-stamp .st-label { font-size: 11px; font-weight: 700; letter-spacing: 1.6px; text-transform: uppercase; opacity: .65; }
  .ack-stamp .st-time { font-family: 'Bricolage Grotesque', sans-serif; font-weight: 700; font-size: 22px; letter-spacing: -0.02em; margin-top: 5px; }
  .ack-stamp .st-ref-label { font-size: 11px; font-weight: 700; letter-spacing: 1.6px; text-transform: uppercase; opacity: .65; text-align: right; }
  .ack-stamp .st-ref { font-family: 'Bricolage Grotesque', sans-serif; font-weight: 700; font-size: 18px; margin-top: 5px; text-align: right; }

  .ack-body { padding: 30px 32px 34px; }
  .ack-intro { font-size: 15px; line-height: 1.65; color: var(--ink-soft); margin-bottom: 26px; }
  .ack-intro strong { color: var(--ink); font-weight: 600; }

  .ack-dl { display: grid; grid-template-columns: 200px 1fr; gap: 0; border-top: 1px solid var(--rule-2); }
  .ack-dl .dt, .ack-dl .dd { padding: 13px 4px; border-bottom: 1px solid var(--rule-2); font-size: 14.5px; }
  .ack-dl .dt { font-weight: 600; color: var(--ink-mute); }
  .ack-dl .dd { color: var(--ink); }

  .ack-foot {
    margin-top: 26px; padding-top: 20px; border-top: 1px solid var(--rule-2);
    font-size: 12.5px; line-height: 1.6; color: var(--ink-mute);
  }

  @media print {
    .site-nav, .site-footer, .no-print, .ret-back { display: none !important; }
    .ret-wrap { padding: 0; max-width: 100%; }
    body, html { background: #fff; }
    .ack-receipt { box-shadow: none; border-color: #ccc; }
    .ack-stamp { background: #163c79 !important; -webkit-print-color-adjust: exact; print-color-adjust: exact; }
  }

  @media (max-width: 640px) {
    .ret-wrap { padding: 108px 20px 90px; }
    .grid2 { grid-template-columns: 1fr; }
    .ack-dl { grid-template-columns: 1fr; }
    .ack-dl .dt { padding-bottom: 2px; border-bottom: 0; }
    .ack-dl .dd { padding-top: 2px; }
    .ret-card-body, .ret-card-head, .ack-body, .ack-stamp { padding-left: 22px; padding-right: 22px; }
  }