@font-face{font-family:Readex Pro;src:url(/fonts/ReadexPro-Regular.ttf) format("truetype");font-weight:400;font-display:swap}@font-face{font-family:Readex Pro;src:url(/fonts/ReadexPro-Medium.ttf) format("truetype");font-weight:500;font-display:swap}@font-face{font-family:Readex Pro;src:url(/fonts/ReadexPro-Bold.ttf) format("truetype");font-weight:700;font-display:swap}:root{--page: #fff8ef;--card: #ffffff;--sand: #ffede3;--ink: #23233f;--muted: #5a5670;--night: #23233f;--on-night: #fff8ef;--coral: #ff7a59;--on-coral: #23233f;--primary: #b8442f;--on-primary: #ffffff;--mint: #3cc6a6;--on-mint: #0f2e27;--mint-ink: #1b7a63;--butter: #ffd45c;--on-butter: #3a2a00;--good: #e1f6ef;--hint: #fff3cc;--solution: #e6e9fb;--border: #f0dfd3;--border-strong: #8f7c86;--focus: #3b5bdb;--danger: #a3195b;--radius-sm: 12px;--radius-md: 16px;--radius-lg: 22px;--radius-xl: 28px;font-family:Readex Pro,system-ui,sans-serif;color:var(--ink);background:var(--page)}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:var(--page);font-size:16px;line-height:1.6}a{color:var(--primary)}h1,h2,h3{line-height:1.3;margin:0 0 12px}h1{font-size:26px}h2{font-size:21px}h3{font-size:17px}:focus-visible{outline:3px solid var(--focus);outline-offset:2px}.muted{color:var(--muted)}.small{font-size:14px}.ltr{direction:ltr;unicode-bidi:isolate;display:inline-block}.topbar{background:var(--coral);color:var(--on-coral)}.topbar-inner{max-width:1120px;margin:0 auto;padding:12px 16px;display:flex;align-items:center;gap:14px;flex-wrap:wrap}.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:20px;color:inherit;text-decoration:none}.brand img{width:36px;height:36px;border-radius:10px}.nav{display:flex;gap:6px;flex-wrap:wrap;margin-inline-start:auto}.nav a{color:var(--on-coral);text-decoration:none;padding:6px 12px;border-radius:999px;font-weight:500}.nav a.active,.nav a:hover{background:#fff8ef8c}.page{max-width:1120px;margin:0 auto;padding:24px 16px 64px}.admin .topbar{background:var(--night);color:var(--on-night)}.admin .nav a{color:var(--on-night)}.admin .nav a.active,.admin .nav a:hover{background:#fff8ef26}.card{background:var(--card);border:2px solid var(--border);border-radius:var(--radius-lg);padding:18px}.grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fill,minmax(260px,1fr))}.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.stack{display:flex;flex-direction:column;gap:12px}.spacer{flex:1}.stat{font-size:30px;font-weight:700}.stats{display:grid;gap:12px;grid-template-columns:repeat(auto-fill,minmax(150px,1fr))}.btn{font:inherit;font-weight:700;border:2px solid transparent;border-radius:var(--radius-md);padding:10px 18px;min-height:44px;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:8px;text-decoration:none}.btn-primary{background:var(--primary);color:var(--on-primary)}.btn-secondary{background:var(--card);color:var(--primary);border-color:var(--border-strong)}.btn-quiet{background:var(--sand);color:var(--ink)}.btn-danger{background:var(--card);color:var(--danger);border-color:var(--danger)}.btn[disabled]{opacity:.5;cursor:not-allowed}.btn-block{width:100%}label{font-weight:500;display:block;margin-bottom:4px}input,select,textarea{font:inherit;color:var(--ink);background:var(--card);border:2px solid var(--border-strong);border-radius:var(--radius-sm);padding:10px 12px;min-height:44px;width:100%}input:focus,select:focus,textarea:focus{outline:3px solid var(--focus);outline-offset:1px}.field{margin-bottom:14px}.checkbox{display:flex;gap:8px;align-items:center;font-weight:400}.checkbox input{width:20px;min-height:20px}.tabs{display:flex;gap:6px;flex-wrap:wrap;border-bottom:2px solid var(--border);margin-bottom:18px}.tabs a{padding:10px 14px;text-decoration:none;color:var(--muted);font-weight:700;border-bottom:3px solid transparent;margin-bottom:-2px}.tabs a.active{color:var(--primary);border-color:var(--primary)}.badge{display:inline-block;border-radius:999px;padding:2px 10px;font-size:13px;font-weight:700}.badge-good{background:var(--good);color:var(--mint-ink)}.badge-hint{background:var(--hint);color:var(--on-butter)}.badge-none{background:var(--sand);color:var(--muted)}.banner{border-radius:var(--radius-md);padding:12px 16px}.banner-good{background:var(--good)}.banner-hint{background:var(--hint)}.banner-error{background:#fde7ef;color:var(--danger)}.empty{text-align:center;padding:32px 16px;color:var(--muted)}.empty img{width:72px;margin-bottom:10px}.table-wrap{overflow-x:auto}table{border-collapse:collapse;width:100%;background:var(--card)}th,td{padding:10px 12px;border-bottom:1px solid var(--border);text-align:start;vertical-align:middle}th{font-size:14px;color:var(--muted);font-weight:700}.heat td.cell{width:34px;height:34px;padding:0;text-align:center}.heat .dot{display:inline-block;width:22px;height:22px;border-radius:6px}.dot-mastered{background:var(--mint)}.dot-learning{background:var(--sand);border:1px solid var(--border-strong)}.dot-struggling{background:var(--butter)}.dot-none{background:transparent;border:1px dashed var(--border)}.heat th.skill{writing-mode:vertical-rl;transform:rotate(180deg);white-space:nowrap;font-size:12px;height:150px;padding:6px 2px}.code{font-size:44px;font-weight:700;letter-spacing:6px;direction:ltr;unicode-bidi:isolate}.qr{width:200px;height:200px;image-rendering:pixelated;border-radius:var(--radius-md);border:2px solid var(--border)}.poster{display:none}@media print{body *{visibility:hidden}.poster,.poster *{visibility:visible}.poster{display:block;position:fixed;inset:0;padding:40px;text-align:center;background:#fff}.poster .code{font-size:72px}.poster .qr{width:320px;height:320px}}.toast{position:fixed;bottom:20px;inset-inline-start:50%;transform:translate(50%);background:var(--night);color:var(--on-night);padding:10px 18px;border-radius:999px;z-index:50}.login{max-width:420px;margin:48px auto}.login .logo{width:72px;height:72px;border-radius:18px;display:block;margin:0 auto 12px}