.learner-surface{max-width:820px;margin:28px auto;padding:0 42px 38px;border:1px solid var(--tl-hair);border-radius:var(--tl-radius-surface,28px);background:var(--tl-paper);box-shadow:0 18px 70px rgba(17,38,49,.1);backdrop-filter:blur(var(--tl-blur,16px))}.learner-head{display:flex;align-items:center;min-height:88px;border-bottom:1px solid var(--tl-hair)}.brand{color:inherit;text-decoration:none}.brand b{display:block;font:italic 29px var(--tl-font-jp,serif)}.brand span{display:block;color:var(--tl-ink-soft);font-size:13px}.settings{margin-left:auto;width:44px;height:44px;position:relative;display:grid;place-items:center;border:1px solid var(--tl-hair);border-radius:50%}.settings select{position:absolute;inset:0;width:44px;height:44px;opacity:0;cursor:pointer}.settings:focus-within{outline:2px solid var(--tl-seal);outline-offset:3px}#notice{min-height:1.6em;margin-top:10px;color:var(--tl-ink-soft)}#notice.error{border-left:3px solid var(--tl-seal);padding:10px 15px;color:var(--tl-ink)}#screen{padding-top:30px}h1{margin:8px 0 18px;font:600 clamp(31px,4vw,45px)/1.18 var(--tl-font-jp,serif);letter-spacing:-.035em}.eyebrow{margin:0 0 8px;color:var(--tl-seal);font:600 12px/1.5 var(--tl-font-mono,monospace);letter-spacing:.1em;text-transform:uppercase}.lead{font-size:19px;max-width:650px}.join-form{max-width:540px;margin-top:28px}.join-form label{display:block;margin:18px 0 8px;font-weight:700}.join-form input{width:100%;min-height:52px;padding:12px 14px;border:1px solid var(--tl-hair);border-radius:12px;background:var(--tl-paper-soft);color:var(--tl-ink);font:inherit;text-transform:uppercase;letter-spacing:.08em}.join-form input:focus{outline:2px solid var(--tl-seal);outline-offset:2px}.class-switcher{display:flex;gap:10px;flex-wrap:wrap;margin:20px 0}.class-switcher button{min-height:44px;padding:8px 14px;border:1px solid var(--tl-hair);border-radius:12px;background:none;color:var(--tl-ink)}.class-switcher button[aria-pressed=true]{border-color:var(--tl-seal);box-shadow:inset 3px 0 var(--tl-seal)}.assignment-list{border-top:1px solid var(--tl-hair);margin-top:28px}.assignment{padding:20px 0;border-bottom:1px solid var(--tl-hair)}.assignment h2{margin:0 0 9px;font:600 25px/1.3 var(--tl-font-jp,serif)}.assignment p{margin:8px 0}.assignment .meta{color:var(--tl-ink-soft);font-size:14px}.empty{padding:24px 0;border-top:1px solid var(--tl-hair);color:var(--tl-ink-soft)}.session-note{padding:18px 0;border-top:1px solid var(--tl-hair);color:var(--tl-ink-soft);font-size:14px}.qa{margin-top:34px;padding-top:16px;border-top:1px solid var(--tl-hair);color:var(--tl-ink-soft);font-size:12px}button:focus-visible,a:focus-visible{outline:2px solid var(--tl-seal);outline-offset:3px}@media(max-width:700px){.learner-surface{min-height:100vh;margin:0;padding:0 20px 28px;border:0;border-radius:0}.learner-head{min-height:72px}h1{font-size:32px}.lead{font-size:17px}.assignment h2{font-size:22px}.primary-action{width:100%}}