/* BIRBAUM'S ATELIER — CSS v1.0.1 (05.10.2026 : portes alignées sur les logos SOSBA et ALSBA)
   Site birbaumatelier.ch. Même montage que sosba.ch : polices auto-hébergées
   (Cormorant Garamond + Inter Tight, licence OFL), aucune requête vers un serveur tiers.
   Matières de la marque : fond d'ardoise sombre, or (signature) et cuivre (arbre). */

@font-face{font-family:'Cormorant Garamond';font-style:italic;font-weight:300 600;font-display:swap;src:url('../fonts/cormorant-garamond-latin-ext-ivar.woff2') format('woff2');unicode-range:U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;}
@font-face{font-family:'Cormorant Garamond';font-style:italic;font-weight:300 600;font-display:swap;src:url('../fonts/cormorant-garamond-latin-ivar.woff2') format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;}
@font-face{font-family:'Cormorant Garamond';font-style:normal;font-weight:300 600;font-display:swap;src:url('../fonts/cormorant-garamond-latin-ext-nvar.woff2') format('woff2');unicode-range:U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;}
@font-face{font-family:'Cormorant Garamond';font-style:normal;font-weight:300 600;font-display:swap;src:url('../fonts/cormorant-garamond-latin-nvar.woff2') format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;}
@font-face{font-family:'Inter Tight';font-style:normal;font-weight:300 600;font-display:swap;src:url('../fonts/inter-tight-latin-ext-nvar.woff2') format('woff2');unicode-range:U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;}
@font-face{font-family:'Inter Tight';font-style:normal;font-weight:300 600;font-display:swap;src:url('../fonts/inter-tight-latin-nvar.woff2') format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;}

/* ================= TOKENS ================= */
:root{
  --ba-ardoise: #17191C;      /* fond d'ardoise sombre */
  --ba-ardoise-2: #1F2226;    /* sections alternées */
  --ba-carte: #25292E;
  --ba-filet: #353A40;
  --ba-or: #C4A97A;           /* or de la signature */
  --ba-or-clair: #E2CFA6;
  --ba-cuivre: #C89A7A;       /* cuivre de l'arbre */
  --ba-texte: #D9D3C9;
  --ba-texte-2: #A39C91;
  --ba-titre: #F1EADC;
  --ba-font-display: 'Cormorant Garamond', Georgia, serif;
  --ba-font-body: 'Inter Tight', system-ui, sans-serif;
}

/* ================= BASE ================= */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-behavior: smooth; }
body.ba { margin: 0; background: var(--ba-ardoise); color: var(--ba-texte); font: 400 17px/1.7 var(--ba-font-body); }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--ba-or); text-underline-offset: 3px; }
a:hover { color: var(--ba-or-clair); }
::selection { background: var(--ba-or); color: var(--ba-ardoise); }
:focus-visible { outline: 2px solid var(--ba-or); outline-offset: 3px; }

.ba-skip { position: absolute; left: -9999px; top: 8px; background: var(--ba-or); color: var(--ba-ardoise); padding: 8px 14px; z-index: 10; }
.ba-skip:focus { left: 16px; }

.ba-wrap { max-width: 1080px; margin: 0 auto; padding: 0 16px; }
.ba-narrow { max-width: 720px; }
.ba-center { text-align: center; }

h1, h2, h3 { font-family: var(--ba-font-display); color: var(--ba-titre); font-weight: 500; line-height: 1.15; margin: 0 0 .6em; }
h1 { font-size: clamp(34px, 6vw, 52px); }
h2 { font-size: clamp(30px, 4.6vw, 44px); }
h3 { font-size: 24px; }
p { margin: 0 0 1em; }
strong, .ba-strong { color: var(--ba-titre); font-weight: 500; }
.ba-strong { font-family: var(--ba-font-display); font-size: 26px; font-style: italic; color: var(--ba-or-clair); }

.ba-eyebrow { font-size: 12px; letter-spacing: .22em; text-transform: uppercase; color: var(--ba-cuivre); margin-bottom: 14px; }
.ba-eyebrow a { color: inherit; text-decoration: none; }

/* ================= SECTIONS ================= */
.ba-section { padding: clamp(64px, 10vw, 112px) 0; }
.ba-section--alt { background: var(--ba-ardoise-2); border-top: 1px solid var(--ba-filet); border-bottom: 1px solid var(--ba-filet); }

/* Hero */
.ba-hero { text-align: center; padding: clamp(40px, 8vw, 88px) 0 clamp(56px, 9vw, 96px);
  background: radial-gradient(ellipse 70% 55% at 50% 38%, rgba(200,154,122,.10), transparent 70%), var(--ba-ardoise); }
.ba-hero__arbre { width: min(720px, 92vw); margin: 0 auto; filter: drop-shadow(0 18px 40px rgba(0,0,0,.45)); }
.ba-hero__sig { margin: 8px auto 0; }
.ba-hero__sig img { width: min(460px, 78vw); margin: 0 auto; }
.ba-hero__quote { margin: clamp(32px, 6vw, 56px) auto 0; max-width: 680px; }
.ba-hero__quote p { font-family: var(--ba-font-display); font-style: italic; font-size: clamp(28px, 4.6vw, 42px); line-height: 1.25; color: var(--ba-titre); margin: 0; }
.ba-hero__quote footer { margin-top: 12px; font-size: 13px; letter-spacing: .18em; text-transform: uppercase; color: var(--ba-or); }
.ba-hero__lead { margin: 22px auto 0; color: var(--ba-texte-2); }
.ba-hero__down { display: inline-block; margin-top: 28px; font-size: 14px; letter-spacing: .08em; text-decoration: none; border-bottom: 1px solid currentColor; padding-bottom: 2px; }

/* Cartes "notre façon" */
.ba-grid { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); margin-top: 28px; }
.ba-card { background: var(--ba-carte); border: 1px solid var(--ba-filet); border-top: 2px solid var(--ba-or); border-radius: 6px; padding: 26px 24px; }
.ba-card h3 { color: var(--ba-or-clair); }
.ba-card p { margin: 0; color: var(--ba-texte); }

/* L'arbre */
.ba-vers { list-style: none; margin: 8px 0 0; padding: 0; }
.ba-vers li { font-family: var(--ba-font-display); font-style: italic; font-size: clamp(24px, 3.6vw, 32px); color: var(--ba-titre); line-height: 1.35; padding: 10px 0; border-bottom: 1px solid var(--ba-filet); }
.ba-vers li:last-child { border-bottom: 0; color: var(--ba-cuivre); }

/* Les deux portes */
.ba-portes { display: grid; gap: 22px; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); margin-top: 28px; }
.ba-porte { display: flex; flex-direction: column; align-items: center; text-align: center; text-decoration: none; color: var(--ba-texte);
  background: var(--ba-carte); border: 1px solid var(--ba-filet); border-radius: 8px; padding: 30px 24px 28px; transition: border-color .2s, transform .2s; }
.ba-porte:hover { border-color: var(--ba-or); transform: translateY(-3px); color: var(--ba-texte); }
.ba-porte img { width: min(100%, 330px); height: auto; margin-bottom: 18px; }
.ba-porte__nom { margin-top: auto; }
.ba-porte__nom { font-family: var(--ba-font-display); font-size: 40px; letter-spacing: .2em; color: var(--ba-or-clair); line-height: 1; }
.ba-porte__sous { display: flex; align-items: center; gap: 12px; font-size: 12px; letter-spacing: .2em; text-transform: uppercase; color: #CDB57E; margin: 12px 0 16px; }
/* ligne de base entre deux filets, comme sur les logos SOSBA et ALSBA */
.ba-porte__sous::before, .ba-porte__sous::after { content: ""; width: 26px; height: 1px; background: currentColor; opacity: .7; flex: none; }
.ba-porte__texte { max-width: 34ch; }
.ba-porte__lien { margin-top: 16px; color: var(--ba-or); font-size: 15px; }

/* Contact */
.ba-contact { text-align: center; }
.ba-btn { display: inline-block; padding: 13px 24px; border: 1px solid var(--ba-or); border-radius: 4px; color: var(--ba-or-clair); text-decoration: none; letter-spacing: .03em; transition: background .2s, color .2s; }
.ba-btn:hover { background: var(--ba-or); color: var(--ba-ardoise); }

/* Pages simples (légal, 404) */
.ba-simple .ba-section h2 { font-size: 26px; margin-top: 1.6em; }

/* Pied de page */
.ba-footer { text-align: center; padding: 56px 16px 40px; border-top: 1px solid var(--ba-filet); font-size: 14px; color: var(--ba-texte-2); }
.ba-footer__sig { width: 220px; margin: 0 auto 18px; opacity: .9; }
.ba-footer__contact { margin-bottom: 10px; }
.ba-footer__legal { line-height: 1.9; margin: 0; }
.ba-footer a { color: var(--ba-texte); }

/* petits écrans : la ligne de base tient sur une ligne entre ses filets */
@media (max-width: 420px) { .ba-porte { padding: 26px 16px 24px; } .ba-porte__sous { gap: 8px; letter-spacing: .13em; } .ba-porte__sous::before, .ba-porte__sous::after { width: 16px; } }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .ba-porte { transition: none; } .ba-porte:hover { transform: none; } }