:root{--teal: #0a7680;--teal-deep: #075e66;--teal-soft: #e3f0f0;--ink: #16282d;--bg: #f4f7f6;--sand: #f3efe7;--card: #ffffff;--line: #e4ebea;--grey: #6e8285;--grey-light: #9bacae;--coral: #f26c5a;--green: #2e9e6b;--amber: #c77b1f;--navy: #1f4e79;--plum: #7a3b69;--slate: #5b5ea6;--shadow-card: 0 1px 2px rgba(22, 40, 45, .04), 0 6px 20px rgba(22, 40, 45, .06);--shadow-float: 0 8px 30px rgba(22, 40, 45, .14);--r: 18px;--r-sm: 12px}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body,#root{margin:0;padding:0;min-height:100%}body{background:var(--bg);color:var(--ink);font-family:Inter,-apple-system,Segoe UI,sans-serif;font-size:15px;line-height:1.5}h1,h2,h3,.display{font-family:Poppins,Inter,sans-serif}button{font-family:inherit;border:none;background:none;cursor:pointer;color:inherit}button:disabled{cursor:default}button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid rgba(10,118,128,.45);outline-offset:2px}input,textarea,select{font-family:inherit}.app-shell{max-width:640px;margin:0 auto;padding:0 18px 120px}.topbar{position:sticky;top:0;z-index:30;background:#f4f7f6db;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);margin:0 -18px;padding:14px 18px 10px;display:flex;align-items:center;gap:10px}.wordmark{font-family:Poppins,sans-serif;font-weight:700;font-size:17px;color:var(--ink);letter-spacing:-.01em}.wordmark .tb-dot{color:var(--teal)}.topbar-badge{margin-left:auto;display:flex;align-items:center;gap:6px;background:var(--teal-soft);color:var(--teal-deep);border-radius:999px;padding:5px 12px;font-size:13px;font-weight:700}.view{animation:viewIn .28s cubic-bezier(.2,.7,.3,1)}@keyframes viewIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}.page-title{margin:18px 0 4px;font-size:26px;font-weight:700;letter-spacing:-.02em;line-height:1.15}.page-sub{margin:0 0 18px;font-size:14.5px;color:var(--grey)}.card{background:var(--card);border-radius:var(--r);box-shadow:var(--shadow-card);padding:18px;margin-bottom:14px}.card-label{font-size:11.5px;font-weight:700;letter-spacing:.09em;text-transform:uppercase;color:var(--teal);margin-bottom:10px}.stats-row{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:14px}.stat-card{background:var(--card);border-radius:var(--r-sm);box-shadow:var(--shadow-card);padding:14px 12px;text-align:center}.stat-num{font-family:Poppins,sans-serif;font-size:24px;font-weight:700;color:var(--teal);line-height:1}.stat-lbl{font-size:11.5px;color:var(--grey);margin-top:5px;font-weight:600}.chips{display:flex;flex-wrap:wrap;gap:8px}.chip{border:1.5px solid var(--line);background:#fff;color:var(--ink);border-radius:999px;padding:8px 15px;font-size:13.5px;font-weight:600;transition:transform .12s ease,border-color .15s,background .15s,color .15s}.chip:active{transform:scale(.96)}.chip[data-on=true]{border-color:transparent;color:#fff}.chip-add{border-style:dashed;color:var(--grey);font-weight:700}.btn-primary{width:100%;display:flex;align-items:center;justify-content:center;gap:10px;background:linear-gradient(135deg,#0a7680,#0d8b95);color:#fff;border-radius:14px;padding:16px 18px;font-family:Poppins,sans-serif;font-size:16px;font-weight:600;box-shadow:0 8px 22px #0a768052;transition:transform .12s ease,box-shadow .2s,filter .2s}.btn-primary:active{transform:scale(.98)}.btn-primary:disabled{filter:saturate(.2) brightness(1.05);box-shadow:none}.btn-soft{background:var(--teal-soft);color:var(--teal-deep);border-radius:12px;padding:10px 16px;font-size:14px;font-weight:700;transition:transform .12s ease}.btn-soft:active{transform:scale(.96)}.btn-outline{border:1.5px solid var(--teal);color:var(--teal);background:#fff;border-radius:12px;padding:10px 16px;font-size:14px;font-weight:700}.btn-ghost{color:var(--grey);font-size:12.5px;font-weight:600;text-decoration:underline;text-underline-offset:3px;padding:6px 4px}.btn-danger-ghost{color:var(--coral)}.field{display:block;width:100%;margin-top:6px;font-size:14.5px;padding:12px 14px;border-radius:var(--r-sm);border:1.5px solid var(--line);color:var(--ink);background:#fff;transition:border-color .15s}.field:focus{border-color:var(--teal);outline:none}textarea.field{resize:vertical}.lbl{display:block;font-size:13.5px;font-weight:700;margin-bottom:12px}.seg{display:flex;background:var(--bg);border-radius:12px;padding:4px;gap:4px}.seg button{flex:1;border-radius:9px;padding:9px 6px;font-size:13.5px;font-weight:600;color:var(--grey);transition:all .18s ease}.seg button[data-on=true]{background:#fff;color:var(--ink);box-shadow:0 2px 8px #16282d1a;font-weight:700}.switch-row{display:flex;align-items:center;gap:12px;padding:4px 0}.switch{width:46px;height:27px;border-radius:999px;background:#d6dedd;position:relative;transition:background .2s ease;flex-shrink:0}.switch:after{content:"";position:absolute;top:3px;left:3px;width:21px;height:21px;border-radius:50%;background:#fff;box-shadow:0 1px 4px #0003;transition:transform .2s cubic-bezier(.3,.8,.4,1.2)}.switch[data-on=true]{background:var(--teal)}.switch[data-on=true]:after{transform:translate(19px)}.sentence-card{background:var(--card);border-radius:var(--r);box-shadow:var(--shadow-card);padding:16px;margin-bottom:12px;position:relative;transition:box-shadow .2s}.sentence-card[data-playing=true]{box-shadow:0 0 0 2px var(--teal),var(--shadow-card)}.cat-pill{display:inline-flex;align-items:center;border-radius:999px;padding:3px 10px;font-size:11px;font-weight:700;letter-spacing:.02em}.sentence-en{margin:10px 0 0;font-size:17px;font-weight:600;line-height:1.4}.sentence-fr{margin:4px 0 0;font-size:13.5px;color:var(--grey);font-style:italic}.sentence-tip{margin:8px 0 0;font-size:12.5px;color:var(--teal-deep);font-weight:600;background:var(--teal-soft);border-radius:8px;padding:6px 10px;display:inline-block}.sentence-src{margin:6px 0 0;font-size:11px;color:var(--grey-light)}.play-row{display:flex;flex-wrap:wrap;gap:7px;margin-top:12px;align-items:center}.play-chip{display:inline-flex;align-items:center;gap:6px;background:var(--bg);color:var(--ink);border-radius:10px;padding:8px 12px;font-size:13px;font-weight:600;transition:transform .12s ease,background .15s,color .15s}.play-chip:active{transform:scale(.95)}.play-chip[data-on=true]{background:var(--teal);color:#fff}.play-chip.stop{background:#fdeae7;color:var(--coral)}.master-btn{margin-left:auto;display:inline-flex;align-items:center;gap:6px;border-radius:10px;padding:8px 12px;font-size:13px;font-weight:700;background:var(--bg);color:var(--ink);transition:all .18s ease}.master-btn[data-on=true]{background:var(--green);color:#fff}.more-row{display:flex;gap:4px;margin-top:8px;padding-top:8px;border-top:1px dashed var(--line);animation:viewIn .2s ease}.your-turn{margin:10px 0 0;font-size:13.5px;font-weight:700;color:var(--teal);display:flex;align-items:center;gap:8px}.your-turn:before{content:"";width:9px;height:9px;border-radius:50%;background:var(--teal);animation:pulseDot 1.1s infinite}@keyframes pulseDot{0%,to{opacity:1}50%{opacity:.2}}.dropzone{border:2px dashed #bfd2d1;border-radius:var(--r);background:#fff;padding:28px 18px;text-align:center;transition:border-color .2s,background .2s}.dropzone[data-drag=true]{border-color:var(--teal);background:var(--teal-soft)}.doc-row{display:flex;align-items:center;gap:12px;background:var(--card);border-radius:var(--r-sm);box-shadow:var(--shadow-card);padding:13px 14px;margin-bottom:9px}.doc-icon{width:38px;height:38px;border-radius:11px;flex-shrink:0;display:flex;align-items:center;justify-content:center;background:var(--teal-soft);color:var(--teal-deep);font-size:17px}.bottom-nav{position:fixed;bottom:14px;left:50%;transform:translate(-50%);z-index:50;display:flex;gap:2px;background:#ffffffeb;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-radius:22px;padding:7px;box-shadow:var(--shadow-float);max-width:calc(100% - 24px)}.nav-item{display:flex;flex-direction:column;align-items:center;gap:3px;padding:8px 13px;border-radius:15px;color:var(--grey);font-size:10.5px;font-weight:600;min-width:62px;transition:background .18s,color .18s,transform .12s}.nav-item:active{transform:scale(.94)}.nav-item[data-on=true]{background:var(--teal-soft);color:var(--teal-deep)}.nav-item svg{width:21px;height:21px}@media (max-width: 420px){.nav-item{min-width:0;padding:8px 10px}}.toast{position:fixed;bottom:92px;left:50%;transform:translate(-50%);z-index:60;background:var(--ink);color:#fff;border-radius:999px;padding:11px 20px;font-size:13.5px;font-weight:600;box-shadow:var(--shadow-float);white-space:nowrap;animation:toastIn .3s cubic-bezier(.2,.9,.3,1.2)}@keyframes toastIn{0%{opacity:0;transform:translate(-50%,14px)}to{opacity:1;transform:translate(-50%)}}.skeleton{border-radius:var(--r);height:118px;margin-bottom:12px;background:linear-gradient(100deg,#eef2f1 35%,#f8faf9,#eef2f1 65%);background-size:300% 100%;animation:shimmer 1.3s infinite linear}@keyframes shimmer{0%{background-position:100% 0}to{background-position:-100% 0}}.atelier-hero{background:linear-gradient(135deg,var(--ink),#234049);color:#fff;border-radius:var(--r);padding:18px;margin-bottom:16px}.drill-chip{border:1.5px solid var(--teal);background:#fff;color:var(--ink);border-radius:999px;padding:8px 14px;font-size:13.5px;font-weight:600;display:inline-flex;align-items:center;gap:7px;transition:transform .12s ease,background .15s}.drill-chip:active{transform:scale(.95)}.mech-box{font-size:13.5px;line-height:1.5;background:var(--sand);border-radius:var(--r-sm);padding:11px 13px;margin-top:10px}.quiz-opt{border:2px solid var(--line);background:#fff;color:var(--ink);border-radius:12px;padding:11px 18px;font-size:15px;font-weight:700;transition:transform .12s ease,border-color .15s}.quiz-opt:active:not(:disabled){transform:scale(.95)}.quiz-opt[data-state=target]{background:var(--green);border-color:var(--green);color:#fff}.quiz-opt[data-state=wrong]{background:var(--coral);border-color:var(--coral);color:#fff}.filter-scroll{display:flex;gap:7px;overflow-x:auto;margin:0 -18px;padding:2px 18px 10px;scrollbar-width:none}.filter-scroll::-webkit-scrollbar{display:none}.filter-pill{flex-shrink:0;border-radius:999px;padding:7px 14px;font-size:13px;font-weight:700;background:#fff;color:var(--grey);box-shadow:var(--shadow-card);transition:background .15s,color .15s}.filter-pill[data-on=true]{background:var(--ink);color:#fff}.empty-state{text-align:center;padding:44px 20px;background:#fff;border-radius:var(--r);box-shadow:var(--shadow-card);color:var(--grey)}.empty-emoji{font-size:38px;margin-bottom:8px}.spinner{width:18px;height:18px;border-radius:50%;border:2.5px solid rgba(255,255,255,.35);border-top-color:#fff;animation:spin .8s linear infinite;flex-shrink:0}@keyframes spin{to{transform:rotate(360deg)}}@media (prefers-reduced-motion: reduce){*{animation:none!important;transition:none!important}}