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Mono,Menlo,monospace}@keyframes atis{to{transform:translate(-50%)}}.seats{z-index:2;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;max-width:1080px;margin:-30px auto 0;padding:0 clamp(16px,4vw,48px) 48px;display:grid;position:relative}.seat{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);color:var(--ink);transition:transform .35s var(--ease-out), border-color .25s, box-shadow .35s;animation:w-rise .9s .25s var(--ease-out) both;flex-direction:column;padding:26px 26px 22px;text-decoration:none;display:flex;position:relative;box-shadow:0 1px #1b243005,0 18px 50px -30px #1b243059}.seat+.seat{animation-delay:.35s}.seat:hover{border-color:var(--line-2);transform:translateY(-4px);box-shadow:0 1px #1b243005,0 28px 60px -28px #1b243073}.seat-hint{border-color:#178a5e73}.seat-label{border:1px solid var(--line);font:600 11px var(--text);letter-spacing:.12em;text-transform:uppercase;color:var(--text-2);border-radius:999px;align-self:flex-start;margin-bottom:18px;padding:4px 10px}.seat h2{font:600 clamp(26px, 2.6vw, 32px) / 1.05 var(--display);letter-spacing:-.025em;margin:0}.seat p{max-width:34ch;font:400 15px / 1.5 var(--text);color:var(--text-2);margin:10px 0 22px}.seat-preview{border-top:1px solid var(--line);align-items:center;gap:12px;margin-top:auto;padding-top:18px;display:flex}.seat-preview strong{font:600 14px var(--text);display:block}.seat-preview span:not(.avatar){font:400 13px var(--text);color:var(--text-2)}.avatar{border:1px solid var(--line);width:38px;height:38px;font:700 13px var(--text);color:var(--accent-ink);border-radius:50%;flex:none;place-items:center;display:grid}.avatar-student{color:var(--blue)}.seat-go{border:1px solid var(--line);width:40px;height:40px;font:600 18px var(--text);color:var(--ink);transition:transform .3s var(--ease-out), background .25s, color .25s, border-color .25s;border-radius:50%;place-items:center;display:grid;position:absolute;top:24px;right:24px}.seat:hover .seat-go{background:var(--ink);border-color:var(--ink);color:#fff;transform:translate(3px)}.fineprint{text-align:center;font:400 13px var(--text);color:var(--muted);grid-column:1/-1;margin:6px 0 0}@keyframes w-rise{0%{opacity:0;transform:translateY(16px)}}@media (width<=720px){.seats{grid-template-columns:1fr}}.shell{background:var(--page);grid-template-columns:248px minmax(0,1fr);min-height:100svh;display:grid}.rail{background:var(--card);border-right:1px solid var(--line);flex-direction:column;height:100svh;padding:24px 16px 20px;display:flex;position:sticky;top:0}.rail-brand{padding:4px 10px 26px;text-decoration:none}.rail nav{gap:2px;display:grid}.rail-item{border-radius:var(--r-sm);font:500 14px var(--text);color:var(--text-2);align-items:center;gap:12px;padding:10px 12px;text-decoration:none;transition:background .2s,color .2s;display:flex}.rail-item:hover{background:var(--page);color:var(--ink)}.rail-item.is-active{color:var(--ink);box-shadow:inset 0 0 0 1px var(--line);font-weight:600}.rail-item.is-active svg{color:var(--accent)}.rail-me{border-top:1px solid var(--line);align-items:center;gap:10px;margin-top:auto;padding:12px 10px 0;display:flex}.rail-me strong{font:600 13px var(--text);display:block}.rail-me span:not(.me-avatar){font:400 12px var(--text);color:var(--muted)}.me-avatar{border:1px solid var(--line);width:34px;height:34px;font:700 12px var(--text);color:var(--accent-ink);border-radius:50%;place-items:center;display:grid}.stage{width:100%;max-width:1120px;padding:40px clamp(16px,4vw,56px) 64px;position:relative}.preview-flag{border:1px dashed var(--line-2);font:600 11px var(--text);letter-spacing:.06em;color:var(--muted);border-radius:999px;padding:4px 10px;position:absolute;top:18px;right:clamp(16px,4vw,56px)}.greet-date{font:600 13px var(--text);color:var(--text-2);margin:0 0 6px}.greet{font:600 clamp(32px, 4vw, 44px) / 1.02 var(--display);letter-spacing:-.03em;margin:0 0 28px}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);animation:a-rise .7s var(--ease-out) both}.section-title{font:600 20px var(--display);letter-spacing:-.02em;justify-content:space-between;align-items:baseline;margin:36px 0 12px;display:flex}.section-title a{font:600 13px var(--text);text-decoration:none}@keyframes a-rise{0%{opacity:0;transform:translateY(12px)}}.lesson{grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);display:grid;overflow:hidden}.lesson-main{padding:26px 28px}.lesson-when{font:600 13px var(--text);color:var(--accent-ink);align-items:center;gap:8px;display:inline-flex}.lesson-when .pulse{background:var(--accent);border-radius:50%;width:8px;height:8px;animation:2s infinite pulse;box-shadow:0 0 #178a5e80}@keyframes pulse{70%{box-shadow:0 0 0 9px #178a5e00}to{box-shadow:0 0 #178a5e00}}.lesson-who{font:600 clamp(28px, 3vw, 36px) / 1.05 var(--display);letter-spacing:-.03em;margin:10px 0 6px}.lesson-meta{font:500 13px var(--text);color:var(--text-2);flex-wrap:wrap;gap:8px;margin:0 0 18px;display:flex}.tail{border:1px solid var(--line);letter-spacing:.04em;color:var(--ink);border-radius:6px;padding:2px 8px;font:600 12px ui-monospace,SF Mono,Menlo,monospace}.chips{flex-wrap:wrap;gap:8px;display:flex}.chip{border:1px solid var(--line);font:500 13px var(--text);color:var(--ink-2);border-radius:999px;padding:6px 12px}.lesson-side{border-left:1px solid var(--line);flex-direction:column;justify-content:flex-end;gap:10px;padding:22px 24px;display:flex;position:relative;overflow:hidden}.lesson-sky{background:linear-gradient(#13284d 0%,#6b4f73 60%,#e8956a 100%);height:92px;position:absolute;inset:0 0 auto}.lesson-sky:after{content:"";background:linear-gradient(180deg, transparent, var(--card));height:30px;position:absolute;bottom:0;left:-10%;right:-10%}.lesson-sky span{letter-spacing:.08em;color:#c8ffe1e6;font:600 10.5px ui-monospace,SF Mono,Menlo,monospace;position:absolute;top:14px;left:18px}.ready-row{border:1px solid var(--line);border-radius:var(--r-sm);background:var(--card);font:500 14px var(--text);justify-content:space-between;align-items:center;padding:11px 14px;display:flex;position:relative}.ready-row strong{font:700 14px var(--text)}.ready-ok{color:var(--accent-ink)}.ready-verdict{font:600 15px var(--display);color:var(--accent-ink);align-items:center;gap:8px;margin-top:4px;display:flex;position:relative}.roster{overflow:hidden}.row{border-top:1px solid var(--line);grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:14px;padding:16px 22px;transition:background .2s;display:grid}.row:first-child{border-top:0}.row:hover{background:#fafbfc}.row .me-avatar{width:40px;height:40px}.row-name{font:600 15px var(--text);align-items:center;gap:8px;display:flex}.track{border:1px solid var(--line);font:700 11px var(--text);letter-spacing:.06em;color:var(--text-2);border-radius:6px;padding:1px 7px}.row-sub{font:400 13px var(--text);color:var(--text-2);white-space:nowrap;text-overflow:ellipsis;margin-top:3px;overflow:hidden}.counts{font:600 13px var(--text);color:var(--ink-2);gap:14px;display:flex}.counts span{align-items:center;gap:5px;display:inline-flex}.mark-proficient{color:var(--accent)}.mark-practicing{color:var(--amber)}.mark-introduced{color:var(--muted)}.legend{font:500 12px var(--text);color:var(--muted);gap:16px;margin:10px 4px 0;display:flex}.legend span{align-items:center;gap:6px;display:inline-flex}.gate{grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:16px;margin-top:18px;padding:18px 22px;display:grid}.gate-icon{border:1px solid var(--line);width:42px;height:42px;color:var(--amber);border-radius:50%;place-items:center;display:grid}.gate strong{font:600 15px var(--text);display:block}.gate span{font:400 13px var(--text);color:var(--text-2)}.cite-tag{color:var(--text-2);white-space:nowrap;font:600 12px ui-monospace,SF Mono,Menlo,monospace}.ticks{gap:3px;margin-top:8px;display:flex}.ticks i{background:var(--accent);width:14px;height:6px;animation:tick-in .4s var(--ease-out) both;border-radius:3px}.ticks i.todo{box-shadow:inset 0 0 0 1.5px var(--line-2);background:0 0}@keyframes tick-in{0%{transform:scaleX(0)}}.list{overflow:hidden}.item{border-top:1px solid var(--line);grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:14px;padding:16px 22px;display:grid}.item:first-child{border-top:0}.check{border:1.5px solid var(--line-2);color:#fff;border-radius:50%;place-items:center;width:26px;height:26px;display:grid}.check.is-done{border-color:var(--accent);background:var(--accent)}.item strong{font:600 14.5px var(--text);display:block}.item.is-done strong{color:var(--text-2)}.item span{font:400 13px var(--text);color:var(--text-2)}.btn-ink{background:var(--ink);color:#fff;height:38px;font:600 13.5px var(--text);transition:transform .2s var(--ease-out), background .2s;border:0;border-radius:999px;align-items:center;gap:6px;padding:0 16px;display:inline-flex}.btn-ink:hover{background:#000;transform:translateY(-1px)}.status-pill{border:1px solid var(--line);font:600 12px var(--text);color:var(--ink-2);border-radius:999px;align-items:center;gap:6px;padding:4px 10px;display:inline-flex}.grid-2{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:18px;display:grid}.tabbar{display:none}@media (width<=900px){.shell{grid-template-columns:1fr}.rail{display:none}.stage{padding:28px 16px calc(96px + env(safe-area-inset-bottom))}.preview-flag{margin-bottom:14px;display:inline-block;position:static}.lesson{grid-template-columns:1fr}.lesson-side{border-left:0;border-top:1px solid var(--line)}.grid-2{grid-template-columns:1fr}.row{grid-template-columns:auto minmax(0,1fr)}.row .counts{grid-column:2}.gate{grid-template-columns:auto minmax(0,1fr)}.gate .cite-tag{grid-column:2}.tabbar{z-index:10;padding:8px 6px calc(8px + env(safe-area-inset-bottom));-webkit-backdrop-filter:blur(16px)saturate(1.4);backdrop-filter:blur(16px)saturate(1.4);border-top:1px solid var(--line);background:#ffffffdb;justify-content:space-around;display:flex;position:fixed;inset:auto 0 0}.tab{min-width:60px;font:600 10.5px var(--text);color:var(--muted);flex-direction:column;align-items:center;gap:3px;text-decoration:none;display:flex}.tab.is-active{color:var(--ink)}.tab.is-active svg{color:var(--accent)}}