:root{--navy:#0f2557;--ink:#1b2433;--muted:#5a6472;--line:#d3d9e6;--bg:#f5f6f9;--card:#fff;--accent:#2e6b8a;--gold:#a27a1f;--purple:#6b4c9a;--ref:#b42318;--ok:#1e6b3c;--warn-bg:#fff6e0;--warn-line:#e3c27a;--radius:12px;color:var(--ink);background:var(--bg);font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif}*{box-sizing:border-box}body{background:var(--bg);margin:0}a{color:var(--accent)}button{font:inherit}h1,h2,h3{color:var(--navy);margin:0 0 .5em;line-height:1.2}.wrap{max-width:1100px;margin:0 auto;padding:16px}.narrow{max-width:512px;margin:0 auto;padding:16px}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);margin-bottom:16px;padding:16px}.row{flex-wrap:wrap;align-items:center;gap:12px;display:flex}.grid{grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;display:grid}.muted{color:var(--muted)}.small{font-size:.9em}.badge{letter-spacing:.03em;border-radius:999px;padding:2px 10px;font-size:.8em;font-weight:700;display:inline-block}.badge.demo{color:var(--purple);background:#f3e8ff;border:1px solid #d8c4f0}.badge.phase{color:var(--navy);background:#e8eef7}.note{background:var(--warn-bg);border:1px solid var(--warn-line);border-radius:10px;margin:8px 0;padding:10px 12px}.info{background:#eef4f8;border:1px solid #c8dbe6;border-radius:10px;margin:8px 0;padding:10px 12px}.error{color:#7a1a10;background:#fdecea;border:1px solid #f3b5ad;border-radius:10px;margin:8px 0;padding:10px 12px}.btn{border:1px solid var(--navy);background:var(--navy);color:#fff;cursor:pointer;border-radius:10px;padding:10px 16px;font-weight:600}.btn:disabled{opacity:.45;cursor:not-allowed}.btn.secondary{color:var(--navy);background:#fff}.btn.danger{color:var(--ref);border-color:var(--ref);background:#fff}.btn.small{padding:6px 10px;font-size:.85em}input[type=text],input[type=password],input[type=number],textarea,select{font:inherit;color:var(--ink);background-color:#fff;border:1px solid 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th{color:var(--muted);font-size:.85em;font-weight:600}.table-scroll{overflow-x:auto}.phases{flex-wrap:wrap;gap:6px;display:flex}.phases span{color:var(--muted);background:#eef1f6;border-radius:999px;padding:4px 10px;font-size:.85em}.phases span.on{background:var(--navy);color:#fff}.student{flex-direction:column;min-height:100dvh;display:flex}.student .instruction{color:var(--navy);font-size:1.25rem;font-weight:600;line-height:1.4}.big-btn{cursor:pointer;border:none;border-radius:20px;width:100%;min-height:34vh;font-size:2.2rem;font-weight:800}.big-btn.start{background:var(--ok);color:#fff}.big-btn.stop{background:var(--ref);color:#fff}.projection{font-size:clamp(16px,1.45vw,28px)}.projection .wrap{max-width:1600px}.projection h1{font-size:2.2em}.projection h2{font-size:1.5em}.projection .stat .v{font-size:3em}.projection table.data th,.projection table.data td{padding:.4em .6em}.join-code{letter-spacing:.12em;color:var(--navy);font-size:4em;font-weight:800}.legend{flex-wrap:wrap;align-items:center;gap:16px;margin:4px 0 8px;display:flex}.legend span{align-items:center;gap:6px;display:inline-flex}.result-card{border-left:5px solid var(--navy)}.result-card.group{border-left-color:var(--line)}.primary-tag{background:var(--navy);color:#fff;vertical-align:middle;border-radius:6px;margin-left:8px;padding:2px 8px;font-size:.75em;font-weight:700;display:inline-block}.explore-tag{color:var(--muted);vertical-align:middle;background:#eef1f6;border-radius:6px;margin-left:8px;padding:2px 8px;font-size:.75em;font-weight:700;display:inline-block}.brand{background:var(--navy);color:#fff;border-bottom:4px solid #c3a04f}.brand-inner{align-items:center;gap:14px;max-width:1100px;margin:0 auto;padding:10px 16px;display:flex}.brand-logo{background:#fff;border-radius:50%;flex:none;width:52px;height:52px}.brand-text{flex:1;min-width:0}.brand-kicker{color:#e3c27a;letter-spacing:.12em;text-transform:uppercase;font-size:.75em;font-weight:700}.brand-title{overflow-wrap:anywhere;font-size:1.3em;font-weight:700;line-height:1.25}.brand-right{flex:none;align-items:center;gap:8px;display:flex}.brand-compact .brand-inner{padding:8px 16px}.brand-compact .brand-logo{width:40px;height:40px}.brand-compact .brand-title{font-size:1.05em}.projection .brand-inner,.brand-projection .brand-inner{max-width:1600px;padding:.5em 1em}.brand-projection .brand-logo{width:4.4em;height:4.4em}.brand-projection .brand-kicker{font-size:.9em}.brand-projection .brand-title{font-size:1.8em}.brand .badge.demo{background:#f3e8ff}.stage-list{flex-wrap:wrap;gap:6px;margin:0;padding:0;list-style:none;display:flex}.stage-list li{color:var(--muted);background:#eef1f6;border-radius:999px;padding:4px 10px;font-size:.85em}.stage-list 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var(--line);min-height:28vh;color:var(--navy);cursor:pointer;background:#fff;border-radius:18px;font-size:1.8rem;font-weight:800}.choice-btn.selected{border-color:var(--navy);background:#e8eef7}.hypo{margin:.3em 0;font-size:1.25em}.pbox{border:2px solid var(--line);background:#fff;border-radius:12px;padding:12px}.pbox .val{color:var(--navy);font-size:1.6em;font-weight:800}.seq{letter-spacing:.15em;font-family:ui-monospace,Menlo,monospace;font-size:1.1em}form>label:first-child,form>h2+p+label,.card>label:first-child{margin-top:0}form>.btn,form>.row>.btn{margin-top:16px}.btn.block{width:100%;min-height:46px}.login-card{width:480px;max-width:100%;margin-left:auto;margin-right:auto;padding:24px}.login-foot{text-align:center;width:480px;max-width:100%;margin-left:auto;margin-right:auto}.login-card h2{margin-bottom:4px}.login-card>p{margin:0 0 18px}.input-with-action{position:relative}.input-with-action input{padding-right:84px}.input-action{color:var(--accent);cursor:pointer;background:0 0;border:none;border-radius:8px;padding:6px 10px;font-size:.9rem;font-weight:600;position:absolute;top:50%;right:6px;transform:translateY(-50%)}.input-action:hover{background:#eef4f8}.btn:disabled{color:#fff;opacity:1;background:#9aa3b8;border-color:#9aa3b8}.btn.secondary:disabled{color:#9aa3b8;background:#fff;border-color:#c3cad8}.loading{color:var(--muted);text-align:center;padding:28px 16px}