:root{--bg:#f4f7fb;--card:#fff;--ink:#10203b;--muted:#71809a;--line:#dce4ef;--navy:#07152f;--blue:#2367f2;--soft:#eaf1ff;--ok:#17845b;--bad:#c44949;--shadow:0 14px 40px rgba(20,42,80,.09)}@media(prefers-color-scheme:dark){:root{--bg:#07101f;--card:#0e1b30;--ink:#f3f6fb;--muted:#9caac0;--line:#24344e;--navy:#020915;--blue:#6c9cff;--soft:#142a50;--shadow:0 14px 40px rgba(0,0,0,.22)}}*{box-sizing:border-box}body{margin:0;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--ink)}button,input{font:inherit}.shell{max-width:1040px;margin:auto;min-height:100vh;padding:24px 20px 96px}.top{display:flex;align-items:center;justify-content:space-between;margin-bottom:28px}.brand{display:flex;align-items:center;gap:12px;font-weight:800;font-size:20px}.brand img{width:44px;height:44px;border-radius:13px}.version{font-size:12px;color:var(--muted)}.hero{background:linear-gradient(135deg,#07152f,#143a7b);color:white;border-radius:28px;padding:30px;box-shadow:var(--shadow);margin-bottom:22px}.hero h1{font-size:34px;margin:0 0 7px}.hero p{margin:0;color:#c9d7ef}.levelrow{display:flex;gap:14px;align-items:center;margin-top:24px}.level{font-size:25px;font-weight:800}.bar{height:8px;background:#ffffff2b;border-radius:10px;overflow:hidden;flex:1}.bar i{display:block;height:100%;background:white;border-radius:10px}.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.card{background:var(--card);border:1px solid var(--line);border-radius:22px;padding:22px;box-shadow:var(--shadow)}.mode{cursor:pointer;min-height:165px;transition:.15s}.mode:hover{transform:translateY(-2px)}.mode .ico{font-size:34px}.mode h2{margin:14px 0 5px}.mode p,.muted{color:var(--muted)}.btn{border:0;background:var(--blue);color:#fff;border-radius:14px;padding:13px 18px;font-weight:700;cursor:pointer}.btn.ghost{background:var(--soft);color:var(--blue)}.btn.danger{background:#fff0f0;color:var(--bad)}.nav{position:fixed;left:50%;bottom:18px;transform:translateX(-50%);display:flex;gap:5px;background:var(--card);border:1px solid var(--line);padding:7px;border-radius:18px;box-shadow:var(--shadow);z-index:10}.nav button{border:0;background:transparent;color:var(--muted);padding:10px 14px;border-radius:12px}.nav button.active{background:var(--soft);color:var(--blue);font-weight:700}.login{max-width:430px;margin:10vh auto}.login .card{padding:30px}.field{width:100%;border:1px solid var(--line);background:var(--bg);color:var(--ink);padding:14px;border-radius:13px;margin:7px 0 14px}.sectiontitle{display:flex;justify-content:space-between;align-items:center;margin:26px 0 12px}.sectiontitle h2{margin:0}.skills{display:grid;grid-template-columns:repeat(5,1fr);gap:10px}.skill{text-align:center}.skill strong{font-size:22px;display:block}.topicgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.topic{cursor:pointer;text-align:left}.exercise{max-width:720px;margin:20px auto}.exercise .prompt{font-size:26px;font-weight:750;line-height:1.3;margin:25px 0}.choices{display:grid;gap:10px}.choice{padding:15px;border:1px solid var(--line);border-radius:14px;background:var(--card);color:var(--ink);text-align:left;cursor:pointer}.choice.selected{border-color:var(--blue);background:var(--soft)}.feedback{margin-top:16px;padding:16px;border-radius:14px}.feedback.ok{background:#eaf8f2;color:#126847}.feedback.bad{background:#fff0f0;color:#963838}.progress{font-size:13px;color:var(--muted)}.vocabrow,.histrow,.userrow{display:flex;justify-content:space-between;gap:15px;align-items:center;border-bottom:1px solid var(--line);padding:14px 0}.pill{font-size:12px;padding:5px 9px;border-radius:999px;background:var(--soft);color:var(--blue)}.assessment{max-width:720px;margin:auto}.q{margin-bottom:20px}.q h3{font-size:18px}.notice{padding:14px;background:var(--soft);border-radius:14px;color:var(--ink);margin:12px 0}.voicebox{text-align:center;padding:35px}.mic{width:100px;height:100px;border-radius:50%;border:0;background:var(--blue);color:#fff;font-size:42px;box-shadow:0 0 0 12px var(--soft);margin:25px}.small{font-size:13px}.flex{display:flex;gap:10px;flex-wrap:wrap}.hidden{display:none!important}@media(max-width:700px){.shell{padding:16px 14px 92px}.hero{padding:23px}.hero h1{font-size:28px}.grid,.skills,.topicgrid{grid-template-columns:1fr}.skills{grid-template-columns:repeat(2,1fr)}.nav{width:calc(100% - 20px);justify-content:space-around}.nav button{padding:10px 8px;font-size:12px}.exercise .prompt{font-size:22px}}

/* V1.2 iPhone-first polish */
html{-webkit-text-size-adjust:100%;background:var(--bg)}body{min-height:100dvh;overscroll-behavior-y:none}.shell{padding-top:max(18px,env(safe-area-inset-top));padding-bottom:calc(118px + env(safe-area-inset-bottom))}.top{position:sticky;top:0;z-index:6;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);padding:8px 0 12px;margin-bottom:18px}.nav{bottom:max(10px,env(safe-area-inset-bottom));max-width:760px}.selfcheck{margin-top:14px}.selfanswer{margin-top:10px}@media(max-width:430px){.shell{padding-left:16px;padding-right:16px}.top .brand{font-size:23px}.brand img{width:48px;height:48px}.hero{border-radius:24px;padding:24px 22px}.hero h1{font-size:30px;line-height:1.15}.grid{gap:14px}.mode{min-height:150px;padding:22px}.mode h2{font-size:26px}.mode p{font-size:17px}.nav{width:calc(100% - 16px);border-radius:22px;padding:6px 4px}.nav button{font-size:11px;padding:12px 6px;min-width:0}.exercise{margin:0 auto}.exercise>.card{padding:18px 16px;border-radius:22px}.exercise .prompt{font-size:24px;margin:20px 0}.voicebox{padding:18px 6px 26px}.voicebox .muted{font-size:16px;line-height:1.45}.mic{width:92px;height:92px;margin:22px}.field{font-size:16px}.flex .btn{flex:1;min-width:110px}.vocabrow{align-items:flex-start}.skills{grid-template-columns:repeat(2,minmax(0,1fr))}}

/* V1.6 - Test de niveau : réponses empilées et lisibles sur mobile */
.assessment .q{overflow:hidden}
.assessment .q .choice{display:flex;width:100%;align-items:flex-start;gap:12px;margin-top:10px;line-height:1.35;white-space:normal;overflow-wrap:anywhere;min-width:0}
.assessment .q .choice input[type="radio"]{flex:0 0 auto;margin:3px 0 0;width:20px;height:20px}
@media(max-width:700px){
  .assessment .q{padding:20px 18px;margin-bottom:16px}
  .assessment .q h3{font-size:20px;line-height:1.3;margin:18px 0 14px}
  .assessment .q .choice{font-size:18px;padding:14px 15px;border-radius:14px}
}

/* V2.3 iPhone alignment and learner-paced feedback */
.shell{width:100%;max-width:1040px;margin-inline:auto}.exercise{width:100%;max-width:660px;margin:16px auto}.exercise>.progress{margin:0 0 14px;padding:0 4px;line-height:1.5}.lesson-card{width:100%;overflow:hidden}.lesson-card .prompt{margin:4px 0 22px;line-height:1.34}.lesson-card .choices{gap:12px}.lesson-card .choice{width:100%;min-height:56px;overflow-wrap:anywhere}.lesson-actions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:16px}.lesson-actions #flag{grid-column:1/-1}.lesson-actions .btn{min-width:0}.next-exercise{display:block;width:100%;margin-top:16px;min-height:56px}.correction-row{margin-top:12px;line-height:1.5}.translation{display:block;margin-top:3px;font-weight:500}.translation-note{margin-top:12px;font-size:13px;opacity:.85}.feedback{margin:18px 0 0;line-height:1.5;overflow-wrap:anywhere}.login{width:100%;max-width:430px;margin:clamp(20px,9vh,110px) auto}.login .card{width:100%;margin-inline:auto}.nav{box-sizing:border-box}.top{gap:12px}.brand{min-width:0}.brand img{flex-shrink:0}@media(max-width:430px){.shell{padding-left:16px;padding-right:16px}.lesson-card{padding:20px 16px!important}.lesson-card .prompt{font-size:23px}.lesson-actions .btn{padding:13px 7px;font-size:15px}.exercise{margin-top:6px}.nav{left:50%;width:calc(100% - 24px)}.nav button{flex:1;padding:12px 2px;font-size:11px}.login .card{padding:22px 20px}}