/* SYLVAIN 3D — feuille de style */
:root {
  --nuit: #090C18;
  --nuit-2: #0F1B33;
  --trait-nuit: #1E2842;
  --titre: #162E52;
  --accent: #2A5A95;
  --accent-clair: #5B93E0;
  --fond: #EEF2F8;
  --blanc: #FFFFFF;
  --gris-bleu: #9EAEC5;
  --texte: #0F1B33;
  --texte-2: #3A4660;
  --texte-3: #4A5670;
  --bord: #D3DCEA;
  --champ: #F7F9FC;
  --champ-bord: #C2CDDD;
  --f-titre: 'Montserrat', 'Helvetica Neue', Arial, sans-serif;
  --f-texte: 'IBM Plex Sans', 'Helvetica Neue', Arial, sans-serif;
  --f-mono: 'IBM Plex Mono', ui-monospace, Menlo, Consolas, monospace;
  --marge: clamp(20px, 7vw, 120px);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 96px; }
body { margin: 0; background: var(--fond); color: var(--texte); font-family: var(--f-texte); font-size: 17px; line-height: 1.5; }
img { max-width: 100%; display: block; }
a { color: var(--accent); }
a:hover { color: var(--titre); }
:focus-visible { outline: 3px solid var(--accent-clair); outline-offset: 3px; border-radius: 4px; }
input, select, textarea, button { font: inherit; color: inherit; }
[hidden] { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

h1, h2, h3 { font-family: var(--f-titre); font-weight: 800; letter-spacing: -0.02em; margin: 0; }
.sur-titre { font-family: var(--f-mono); font-size: 14px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--texte-3); margin: 0; }
.section { padding: clamp(64px, 9vw, 112px) var(--marge); }
.section h2 { font-size: clamp(34px, 4.4vw, 50px); line-height: 1.05; color: var(--titre); }

/* ---------- Boutons ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 52px; padding: 0 28px; border-radius: 999px; font-weight: 600; font-size: 17px; text-decoration: none; border: 1.5px solid transparent; cursor: pointer; }
.btn-clair { background: var(--accent-clair); color: var(--nuit); }
.btn-clair:hover { background: #78A8EC; color: var(--nuit); }
.btn-contour { border-color: var(--gris-bleu); color: #F2F5FA; }
.btn-contour:hover { border-color: #F2F5FA; color: #F2F5FA; }
.btn-plein { align-self: flex-start; background: var(--accent); color: #fff; border: none; min-height: 56px; padding: 0 36px; font-size: 18px; }
.btn-plein:hover { background: var(--titre); }
.btn-plein:disabled { opacity: 0.6; cursor: wait; }

/* ---------- En-tête + accueil ---------- */
.nuit {
  background-color: var(--nuit);
  background-image: radial-gradient(circle at 78% 55%, rgba(42,90,149,0.45), rgba(9,12,24,0) 55%),
                    repeating-linear-gradient(45deg, rgba(158,174,197,0.07) 0 1px, transparent 1px 34px);
  color: #F2F5FA;
}
.entete { position: sticky; top: 0; z-index: 10; height: 96px; padding: 0 var(--marge); display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--trait-nuit); background: rgba(9,12,24,0.92); backdrop-filter: blur(8px); }
.marque { display: flex; align-items: center; gap: 12px; text-decoration: none; color: #F2F5FA; white-space: nowrap; }
.marque img { width: 72px; height: 72px; }
.marque span { font-family: var(--f-titre); font-weight: 800; font-size: 24px; letter-spacing: 0.01em; }
.marque:hover { color: #F2F5FA; }
.menu { display: flex; align-items: center; gap: 28px; font-weight: 500; white-space: nowrap; }
.menu a { color: #D6DEEA; text-decoration: none; }
.menu a:hover { color: #fff; }
.menu .btn { min-height: 44px; padding: 0 22px; font-size: 16px; color: var(--nuit); }
.menu .btn:hover { color: var(--nuit); }
.burger { display: none; width: 48px; height: 48px; border: 1px solid var(--trait-nuit); border-radius: 12px; background: transparent; color: #F2F5FA; cursor: pointer; align-items: center; justify-content: center; }

.accueil { padding: clamp(56px, 8vw, 104px) var(--marge) clamp(64px, 9vw, 120px); display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 64px; align-items: center; }
.accueil-texte { display: flex; flex-direction: column; gap: 28px; }
.accueil .sur-titre { color: var(--gris-bleu); }
.accueil h1 { font-size: clamp(40px, 5.2vw, 66px); line-height: 1.05; }
.trait { width: 180px; height: 3px; background: var(--accent-clair); }
.accroche { margin: 0; font-size: clamp(17px, 1.6vw, 20px); line-height: 1.55; color: #C3CEDF; max-width: 540px; }
.boutons { display: flex; flex-wrap: wrap; gap: 16px; }
.confiance { display: flex; align-items: flex-start; gap: 12px; padding-top: 16px; border-top: 1px solid var(--trait-nuit); font-size: 15px; color: #C3CEDF; margin: 0; }
.confiance svg { flex: none; margin-top: 2px; }
.cadre-art { height: 460px; border-radius: 20px; background: radial-gradient(circle at 50% 45%, #1B2C4D 0%, #0E1426 70%); border: 1px solid var(--accent); display: flex; align-items: center; justify-content: center; padding: 24px; }
.hero-art { width: 100%; height: 100%; max-width: 400px; }

/* ---------- Services ---------- */
.services { background: var(--fond); padding: clamp(40px, 5vw, 56px) var(--marge); display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; border-bottom: 1px solid var(--bord); }
.service { display: flex; gap: 16px; align-items: flex-start; background: var(--blanc); border: 1px solid var(--bord); border-radius: 16px; padding: 24px; }
.service svg { flex: none; margin-top: 2px; }
.service h2 { font-size: 19px; line-height: 1.25; color: var(--titre); letter-spacing: -0.01em; margin-bottom: 6px; }
.service p { margin: 0; font-size: 16px; color: var(--texte-2); }

/* ---------- Volume ---------- */
.volume { background: var(--blanc); display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 64px; align-items: center; }
.volume-figure { display: flex; justify-content: center; }
.volume-art { width: 100%; max-width: 420px; height: auto; }
.volume-texte { display: flex; flex-direction: column; gap: 24px; }
.volume-texte h2 { font-size: clamp(40px, 4.8vw, 58px); line-height: 1; }
.volume-texte p { margin: 0; font-size: 19px; line-height: 1.55; color: var(--texte-2); max-width: 520px; }
.fiche { margin: 0; border-top: 1px solid var(--bord); }
.fiche div { display: flex; justify-content: space-between; gap: 16px; padding: 16px 0; border-bottom: 1px solid var(--bord); font-size: 16px; }
.fiche dt { color: var(--texte-3); }
.fiche dd { margin: 0; font-family: var(--f-mono); text-align: right; }

/* ---------- Qui suis-je ---------- */
.apropos { background: var(--blanc); display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 72px; align-items: center; border-bottom: 1px solid var(--bord); }
.apropos-photo { margin: 0; }
.apropos-photo img { width: 100%; height: auto; aspect-ratio: 4 / 5; object-fit: cover; border-radius: 24px; border: 1px solid var(--bord); }
.apropos-texte { display: flex; flex-direction: column; gap: 20px; max-width: 640px; }
.apropos-texte p { margin: 0; font-size: 18px; line-height: 1.6; color: var(--texte-2); }
.apropos-texte .sur-titre { font-size: 14px; color: var(--texte-3); }
.apropos-texte .apropos-appel { font-weight: 600; color: var(--titre); }
.apropos-texte .btn { margin-top: 8px; text-decoration: none; }
.apropos-photo[hidden] + .apropos-texte { grid-column: 1 / -1; }

/* ---------- Filaments ---------- */
.filaments { display: flex; flex-direction: column; gap: 48px; }
.filaments-tete { display: flex; justify-content: space-between; align-items: flex-end; gap: 32px 48px; flex-wrap: wrap; }
.filaments-tete > div { display: flex; flex-direction: column; gap: 16px; }
.filaments-tete p { margin: 0; font-size: 18px; color: var(--texte-2); max-width: 440px; }
.grille-filaments { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.carte-filament { background: var(--blanc); border: 1px solid var(--bord); border-top: 4px solid var(--accent); border-radius: 20px; padding: 32px; display: flex; flex-direction: column; gap: 20px; }
.carte-filament header { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.carte-filament h3 { font-size: 34px; color: var(--titre); letter-spacing: 0; }
.badge { font-size: 14px; font-weight: 600; padding: 6px 12px; border-radius: 999px; white-space: nowrap; }
.badge-stock { background: #DCEBDD; color: #1E5B2A; }
.badge-commande { background: #F6E7C8; color: #7A4A00; }
.carte-filament p { margin: 0; color: var(--texte-2); }
.mini-titre { font-family: var(--f-mono); font-size: 13px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--texte-3); margin: 0 0 6px; }
.usage { font-weight: 500; font-size: 16px; }
.couleurs { padding-top: 20px; border-top: 1px solid #E4EAF3; }
.couleurs ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 10px 16px; font-size: 15px; }
.couleurs li { display: flex; align-items: center; gap: 8px; }
.pastille { width: 22px; height: 22px; border-radius: 999px; border: 1px solid var(--gris-bleu); }
.note-bas { margin: 0; font-size: 16px; color: var(--texte-2); }

/* ---------- Réalisations ---------- */
.realisations { background-color: var(--nuit); background-image: repeating-linear-gradient(45deg, rgba(158,174,197,0.06) 0 1px, transparent 1px 34px); color: #F2F5FA; display: flex; flex-direction: column; gap: 40px; }
.realisations .sur-titre { color: var(--gris-bleu); }
.realisations h2 { color: #F2F5FA; }
.realisations-tete { display: flex; flex-direction: column; gap: 16px; }
.filtres { display: flex; flex-wrap: wrap; gap: 12px; }
.filtres button { min-height: 44px; padding: 0 20px; border-radius: 999px; border: 1.5px solid var(--gris-bleu); background: transparent; color: #F2F5FA; font-size: 16px; font-weight: 500; cursor: pointer; }
.filtres button[aria-pressed="true"] { background: var(--accent-clair); border-color: var(--accent-clair); color: var(--nuit); }
.galerie { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 32px 24px; }
.galerie figure { margin: 0; display: flex; flex-direction: column; gap: 12px; }
.galerie img { width: 100%; height: auto; aspect-ratio: 4 / 3; object-fit: cover; background: var(--nuit-2); border-radius: 16px; border: 1px solid var(--trait-nuit); }
.galerie img.entiere { object-fit: contain; }
.galerie figcaption { display: flex; flex-direction: column; gap: 6px; }
.galerie .ligne-titre { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; font-size: 16px; }
.galerie .ligne-titre strong { font-weight: 600; }
.galerie .tag { font-family: var(--f-mono); font-size: 13px; color: var(--accent-clair); white-space: nowrap; }
.galerie .note { margin: 0; font-size: 14px; line-height: 1.45; color: var(--gris-bleu); }

/* ---------- Clients et partenaires ---------- */
.partenaires { background: var(--blanc); display: flex; flex-direction: column; gap: 40px; padding-top: clamp(56px, 7vw, 88px); padding-bottom: clamp(56px, 7vw, 88px); border-bottom: 1px solid var(--bord); }
.partenaires h2 { font-size: clamp(26px, 3vw, 34px); }
.logos { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; align-items: center; gap: 32px 56px; }
.logos li { display: flex; align-items: center; justify-content: center; height: 72px; }
.logos a { display: flex; align-items: center; height: 100%; }
.logos img { max-height: 64px; max-width: 180px; width: auto; height: auto; object-fit: contain; filter: grayscale(1); opacity: 0.75; }

/* ---------- FAQ ---------- */
.faq { display: grid; grid-template-columns: 380px minmax(0, 1fr); gap: 80px; align-items: start; border-bottom: 1px solid var(--bord); }
.faq-tete { display: flex; flex-direction: column; gap: 16px; }
.faq-liste { border-top: 1px solid var(--bord); }
.faq details { border-bottom: 1px solid var(--bord); }
.faq summary { list-style: none; cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 20px 0; font-weight: 600; font-size: 18px; color: var(--titre); }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: '+'; flex: none; width: 32px; height: 32px; border-radius: 999px; border: 1.5px solid var(--champ-bord); display: flex; align-items: center; justify-content: center; font-size: 20px; font-weight: 400; color: var(--accent); }
.faq details[open] summary::after { content: '−'; }
.faq details p { margin: 0 0 20px; color: var(--texte-2); max-width: 680px; }

/* ---------- Devis ---------- */
.devis { display: grid; grid-template-columns: 380px minmax(0, 1fr); gap: 80px; align-items: start; }
.devis-info { display: flex; flex-direction: column; gap: 32px; }
.devis-info > div:first-child { display: flex; flex-direction: column; gap: 16px; }
.devis-info p { margin: 0; font-size: 18px; color: var(--texte-2); }
.devis-info .prix { font-size: 16px; padding: 16px 18px; border-left: 3px solid var(--accent-clair); background: var(--blanc); border-radius: 0 12px 12px 0; }
.etapes { margin: 0; padding: 0; list-style: none; counter-reset: etape; display: flex; flex-direction: column; gap: 20px; }
.etapes li { counter-increment: etape; display: flex; gap: 16px; align-items: flex-start; font-size: 17px; line-height: 1.45; }
.etapes li::before { content: counter(etape, decimal-leading-zero); font-family: var(--f-mono); font-weight: 500; color: var(--accent); font-size: 18px; }
.contact-direct { display: flex; flex-direction: column; gap: 10px; padding-top: 24px; border-top: 1px solid var(--bord); font-size: 17px; }

.carte-form { background: var(--blanc); border: 1px solid var(--bord); border-radius: 24px; padding: clamp(24px, 4vw, 48px); }
.formulaire { display: flex; flex-direction: column; gap: 28px; }
.formulaire fieldset { margin: 0; padding: 0; border: none; }
.formulaire legend { font-weight: 600; font-size: 16px; padding: 0; margin-bottom: 12px; }
.radios { display: flex; flex-wrap: wrap; gap: 12px 24px; font-size: 17px; }
.radios label { display: flex; align-items: center; gap: 10px; cursor: pointer; }
.radios input, .accord input { width: 20px; height: 20px; accent-color: var(--accent); margin: 0; flex: none; }
.deux-col { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.champ { display: flex; flex-direction: column; gap: 8px; font-weight: 600; font-size: 16px; }
.champ input, .champ select, .champ textarea { width: 100%; min-height: 52px; padding: 0 16px; border: 1.5px solid var(--champ-bord); border-radius: 12px; font-size: 17px; font-weight: 400; background: var(--champ); }
.champ textarea { padding: 14px 16px; line-height: 1.5; resize: vertical; }
.champ input:focus, .champ select:focus, .champ textarea:focus { border-color: var(--accent); outline: none; box-shadow: 0 0 0 3px rgba(91,147,224,0.35); }
.aide { font-weight: 400; font-size: 14px; color: var(--texte-3); }
.pilules { display: flex; flex-wrap: wrap; gap: 12px; }
.pilules label { position: relative; }
.pilules input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.pilules span { display: inline-flex; align-items: center; min-height: 48px; padding: 0 24px; border-radius: 12px; border: 1.5px solid var(--champ-bord); background: var(--champ); font-size: 17px; font-weight: 600; cursor: pointer; }
.pilules input:checked + span { background: var(--accent); border-color: var(--accent); color: #fff; }
.pilules input:focus-visible + span { outline: 3px solid var(--accent-clair); outline-offset: 3px; }
.fichier { border: 2px dashed var(--gris-bleu); border-radius: 16px; padding: 24px; display: flex; gap: 20px; align-items: flex-start; background: var(--champ); }
.fichier svg { flex: none; }
.fichier p { margin: 0 0 12px; font-size: 16px; }
.fichier .champ { font-size: 15px; }
.accord { display: flex; align-items: flex-start; gap: 12px; font-size: 15px; line-height: 1.5; color: var(--texte-2); }
.accord input { margin-top: 2px; }
.cache { display: none; }
.erreur { margin: 0; padding: 14px 16px; border-radius: 12px; background: #FBE9E9; color: #8A1C1C; font-size: 16px; }
.merci { display: flex; flex-direction: column; align-items: center; gap: 16px; padding: 80px 0; text-align: center; }
.merci h3 { font-size: 32px; color: var(--titre); letter-spacing: 0; }
.merci p { margin: 0; font-size: 18px; color: var(--texte-2); max-width: 420px; }
.btn-retour { min-height: 44px; padding: 0 22px; border-radius: 999px; border: 1.5px solid var(--titre); background: transparent; color: var(--titre); font-size: 16px; font-weight: 500; cursor: pointer; }

/* ---------- Pied de page ---------- */
.pied { padding: 72px var(--marge); background: var(--nuit); color: #C3CEDF; display: flex; flex-direction: column; gap: 40px; }
.pied-grille { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 40px 48px; font-size: 16px; line-height: 1.6; }
.pied-marque { display: flex; align-items: center; gap: 16px; }
.pied-marque img { width: 104px; height: 104px; }
.pied-marque strong { display: block; font-family: var(--f-titre); font-weight: 800; font-size: 22px; color: #F2F5FA; }
.pied-col { display: flex; flex-direction: column; gap: 6px; }
.pied-col h2 { font-family: var(--f-mono); font-weight: 400; font-size: 13px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--gris-bleu); margin: 0 0 4px; }
.pied a { color: #F2F5FA; }
.pied a:hover { color: var(--accent-clair); }
.insta { display: inline-flex; align-items: center; gap: 8px; }
.copyright { border-top: 1px solid var(--trait-nuit); padding-top: 24px; font-size: 14px; color: var(--gris-bleu); margin: 0; }

/* ---------- Pages légales ---------- */
.page-legale { max-width: 760px; margin: 0 auto; padding: 64px 20px 96px; }
.page-legale h1 { font-size: clamp(32px, 5vw, 44px); color: var(--titre); margin-bottom: 32px; }
.page-legale h2 { font-family: var(--f-titre); font-size: 22px; color: var(--titre); letter-spacing: 0; margin: 40px 0 12px; }
.page-legale p, .page-legale li { color: var(--texte-2); }
.retour { display: inline-block; margin-bottom: 32px; font-weight: 600; }

/* ---------- Tablette ---------- */
@media (max-width: 1100px) {
  .grille-filaments { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .services { grid-template-columns: minmax(0, 1fr); gap: 12px; }
  .galerie { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .devis, .faq { grid-template-columns: minmax(0, 1fr); gap: 32px 48px; }
}

@media (max-width: 1240px) {
  .entete { height: 80px; }
  html { scroll-padding-top: 80px; }
  .burger { display: inline-flex; }
  .menu { display: none; position: absolute; top: 80px; left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 0; padding: 8px var(--marge) 24px; background: var(--nuit); border-bottom: 1px solid var(--trait-nuit); }
  .menu.ouvert { display: flex; }
  .menu a { padding: 16px 0; border-bottom: 1px solid var(--trait-nuit); font-size: 18px; }
  .menu .btn { margin-top: 16px; border-bottom: none; min-height: 52px; }
}

/* ---------- Mobile ---------- */
@media (max-width: 860px) {
  .accueil, .volume, .apropos { grid-template-columns: minmax(0, 1fr); gap: 40px; }
  .apropos-photo img { max-width: 360px; }
  .cadre-art { height: 300px; }
  .volume-figure { order: 2; }
  .volume-art { max-width: 300px; }
  .pied-grille { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 600px) {
  body { font-size: 16px; }
  .marque span { font-size: 20px; }
  .marque img { width: 56px; height: 56px; }
  .grille-filaments { grid-template-columns: minmax(0, 1fr); }
  .galerie { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px 12px; }
  .galerie .ligne-titre { flex-direction: column; gap: 2px; font-size: 14px; }
  .galerie .tag { font-size: 12px; }
  .galerie .note { font-size: 13px; }
  .galerie img { border-radius: 12px; }
  .deux-col { grid-template-columns: minmax(0, 1fr); }
  .fichier { flex-direction: column; gap: 12px; padding: 20px; }
  .boutons .btn { flex: 1 1 auto; }
  .btn-plein { width: 100%; }
  .logos { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
  .logos img { max-width: 140px; max-height: 52px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}