:root{--marine:#1B2544;--marine2:#2C3D66;--laiton:#B8862B;--laiton2:#E2B858;--ink:#1D2432;--ink2:#5A6275;--bg:#F5F1E8;--paper:#FFFDF8;--line:#E2DCCD;--pale:#DEE4F0;--sand:#FBE9CF}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Figtree,'Segoe UI',system-ui,sans-serif;color:var(--ink);background:var(--bg);font-size:17px;line-height:1.55}
h1,h2,h3{font-family:Fraunces,Georgia,serif;font-weight:600;line-height:1.15;margin:0}
h1{font-size:clamp(34px,5vw,54px)}
h2{font-size:clamp(26px,3.4vw,36px)}
h3{font-size:21px}
p{margin:0}
a{color:var(--marine)}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}
.btn{display:inline-flex;align-items:center;justify-content:center;height:50px;padding:0 24px;border-radius:9px;border:none;background:var(--marine);color:#fff;font-weight:600;font-size:16px;text-decoration:none;cursor:pointer}
.btn:hover{background:var(--marine2)}
.btn.laiton{background:var(--laiton);color:#fff}
.btn.laiton:hover{background:#9E7222}
header{position:sticky;top:0;background:rgba(245,241,232,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);z-index:5}
header .wrap{height:72px;display:flex;align-items:center;justify-content:space-between;gap:16px}
header nav{display:flex;gap:22px;align-items:center;font-weight:500}
header nav a{text-decoration:none;color:var(--ink2)}
header nav a:hover{color:var(--marine)}
.hero{padding:80px 0 56px}
.hero .wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero p.lead{font-size:20px;color:var(--ink2);margin:20px 0 28px;max-width:34em}
.hero form{display:flex;gap:8px;max-width:520px}
.hero .note{font-size:14px;color:var(--ink2);margin-top:10px}
.shot{border-radius:14px;overflow:hidden;box-shadow:0 30px 70px -30px rgba(27,37,68,.45);border:1px solid var(--line);background:#fff}
.shot img{display:block;width:100%;height:auto}
input,select,textarea{font-family:inherit;font-size:16px;color:var(--ink);height:50px;padding:0 14px;border:1px solid #C9C3B3;border-radius:9px;background:#fff;width:100%}
textarea{height:auto;padding:12px 14px;resize:vertical}
input:focus,select:focus,textarea:focus{outline:2px solid var(--laiton);outline-offset:1px;border-color:var(--laiton)}
section{padding:72px 0}
.dark{background:var(--marine);color:#EEF0F5}
.dark h2{color:#fff}
.feat{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;margin-top:36px}
.feat article{background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:26px 28px}
.feat article h3{margin-bottom:8px}
.feat article p{color:var(--ink2)}
.tag{display:inline-block;padding:5px 12px;border-radius:999px;background:var(--sand);color:#7A3F08;font-size:13px;font-weight:700;margin-bottom:14px}
.dark .tag{background:rgba(226,184,88,.18);color:var(--laiton2)}
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split.rev>div:first-child{order:2}
.steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;margin-top:36px}
.steps div{border-top:3px solid var(--laiton2);padding-top:16px}
.steps h3{color:#fff;margin-bottom:8px}
.steps p{color:#C9CFDE}
.phone{width:320px;margin:0 auto;border-radius:36px;border:9px solid #0F1730;box-shadow:0 30px 70px -30px rgba(0,0,0,.6);background:var(--bg);color:var(--ink);overflow:hidden;font-size:14px;line-height:1.4}
.ph-head{background:var(--marine);color:#fff;padding:26px 18px 16px}
.ph-h1{font-family:Fraunces,Georgia,serif;font-weight:600;font-size:24px}
.ph-sub{font-size:12px;color:#C9CFDE;margin-top:2px}
.ph-body{padding:14px 14px 6px;display:flex;flex-direction:column;gap:12px}
.ph-next{background:var(--pale);color:var(--marine);border-radius:10px;padding:12px 14px}
.ph-lbl{font-size:11px;font-weight:700;letter-spacing:.01em;margin-bottom:2px;color:inherit}
.ph-big{font-size:16px;font-weight:700}
.ph-sm{font-size:12px;color:var(--ink2)}
.ph-next .ph-sm{color:var(--marine)}
.ph-h2{font-family:Fraunces,Georgia,serif;font-weight:600;font-size:15px;margin-top:2px}
.ph-card{background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:14px}
.ph-title{font-family:Fraunces,Georgia,serif;font-weight:600;font-size:16px}
.ph-note{background:var(--bg);border-radius:8px;padding:9px 11px;font-size:13px;margin-bottom:8px}
.ph-note .ph-lbl{color:var(--ink2)}
.ph-note.memo{background:var(--sand);color:#4A2605}.ph-note.memo .ph-lbl{color:#7A3F08}
.ph-row{display:flex;gap:6px;margin-top:8px}
.ph-input{flex:1;border:1px solid #C9C3B3;border-radius:7px;background:#fff;padding:9px 10px;color:#8A90A0;font-size:12px}
.ph-btn{flex:1;background:var(--marine);color:#fff;border-radius:7px;padding:9px 12px;font-weight:600;font-size:12px;text-align:center}
.ph-btn.ghost{background:#fff;color:var(--ink);border:1px solid #C9C3B3}
.ph-row .ph-input+.ph-btn{flex:0 0 auto}
.ph-nav{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);background:var(--paper);padding:14px 4px 18px;font-size:11px;font-weight:600;color:var(--ink2);text-align:center}
.ph-nav .on{color:var(--marine);font-weight:700}
.form{background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:36px;max-width:720px;margin:36px auto 0}
.form .row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.form label{display:flex;flex-direction:column;gap:6px;font-weight:600;font-size:15px;margin-bottom:14px}
.form label.chk{flex-direction:row;align-items:flex-start;gap:10px;font-weight:400;font-size:14px;color:var(--ink2)}
.form label.chk input{width:20px;height:20px;margin-top:2px;flex-shrink:0}
.form .ok{display:none;background:var(--pale);color:var(--marine);padding:18px 20px;border-radius:10px;font-weight:500}
.form .err{display:none;background:var(--sand);color:#7A3F08;padding:14px 18px;border-radius:10px;margin-top:12px}
footer{padding:36px 0;border-top:1px solid var(--line);color:var(--ink2);font-size:14px}
footer .wrap{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
footer a{color:var(--ink2)}
@media (max-width:860px){.hero .wrap,.split{grid-template-columns:1fr}.split.rev>div:first-child{order:0}.feat,.steps,.form .row{grid-template-columns:1fr}.hero form{flex-direction:column}header nav a.hide{display:none}.hero{padding-top:48px}}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* fil de conversation du téléphone (section Côté élèves) */
.ph-chat{display:flex;flex-direction:column;gap:8px;margin-bottom:8px}
.ph-msg{max-width:86%;display:flex;flex-direction:column;gap:2px}
.ph-msg .ph-lbl{color:var(--ink2);padding:0 4px;margin:0}
.ph-b{padding:8px 11px;border-radius:12px;font-size:13px;line-height:1.45}
.ph-msg.prof{align-self:flex-start}.ph-msg.prof .ph-b{background:var(--marine);color:#fff;border-bottom-left-radius:4px}
.ph-msg.eleve{align-self:flex-end;align-items:flex-end}.ph-msg.eleve .ph-b{background:var(--sand);color:#4A2605;border-bottom-right-radius:4px}