:root{--ink: #171d2e;--ink-soft: #4a5166;--paper: #f7f6f2;--card: #ffffff;--line: #dcdad2;--cobalt: #2743c9;--cobalt-deep: #1c2f96;--gold: #f2b600;--correct: #1e7a49;--correct-bg: #e8f4ec;--wrong: #b3372a;--wrong-bg: #f9ebe8;--radius: 10px;--serif: "Source Serif 4", Georgia, serif;--sans: "Archivo", system-ui, sans-serif}*{box-sizing:border-box}html,body,#root{margin:0;min-height:100%}body{background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.55}h1,h2,h3{font-family:var(--sans);line-height:1.15;margin:0 0 .5rem}h1{font-size:2rem;font-weight:750;font-stretch:90%}h2{font-size:1.35rem;font-weight:700}h3{font-size:1.05rem;font-weight:650}p{margin:0 0 .8rem}.shell{max-width:900px;margin:0 auto;padding:0 20px 80px}.site-head{background:linear-gradient(120deg,#141a2b,#1b2440 55%,#22305a);border-bottom:3px solid var(--gold);box-shadow:0 2px 16px #171d2e47;position:sticky;top:0;z-index:40}.site-head-inner{max-width:900px;margin:0 auto;padding:13px 20px;display:flex;align-items:center;gap:16px;flex-wrap:wrap}.brand{font-weight:800;font-stretch:85%;font-size:1.18rem;letter-spacing:.01em;color:#fff;display:flex;align-items:center;gap:10px}.brand .dot{color:var(--gold)}.brand .stair i{background:#39425f}.brand .stair i.lit{background:var(--gold)}.site-head nav{display:flex;gap:4px;flex-wrap:wrap;margin-left:auto;align-items:center}.site-head nav button{background:none;border:none;font:inherit;font-weight:600;font-size:.92rem;color:#aeb6cf;padding:8px 14px;cursor:pointer;border-radius:999px;transition:background .15s,color .15s}.site-head nav button:hover{color:#fff;background:#ffffff17}.site-head nav button.active{color:#fff;background:var(--cobalt)}.site-head nav button.signout{color:#8f97b3;border:1.5px solid #39425f;margin-left:6px}.site-head nav button.signout:hover{color:#fff;border-color:#8f97b3;background:none}.site-head .who{color:#8f97b3;font-size:.8rem}.shell{padding-top:26px}.login-wrap{max-width:430px;margin:9vh auto 0;padding:0 20px}.login-mark{font-weight:800;font-stretch:80%;font-size:2.4rem;line-height:1;margin-bottom:4px;display:flex;align-items:center;gap:12px}.login-mark .dot{color:var(--cobalt)}.login-stair i{background:var(--line)}.login-stair i.lit{background:var(--gold)}.login-sub{color:var(--ink-soft);margin-bottom:26px}.stair{display:inline-flex;align-items:flex-end;gap:3px;height:22px}.stair i{width:9px;border-radius:2px 2px 0 0;background:var(--line);display:block}.stair i:nth-child(1){height:8px}.stair i:nth-child(2){height:15px}.stair i:nth-child(3){height:22px}.stair i.lit{background:var(--gold)}.stair.big{height:34px;gap:5px}.stair.big i{width:14px}.stair.big i:nth-child(1){height:13px}.stair.big i:nth-child(2){height:23px}.stair.big i:nth-child(3){height:34px}.stair-legend{display:flex;gap:26px;flex-wrap:wrap;margin:4px 0 18px;font-size:.85rem;font-weight:600;color:var(--ink-soft)}.stair-legend .item{display:inline-flex;align-items:center;gap:9px}.stair-live{display:inline-flex;align-items:flex-end;gap:8px}.stair-live-label{font-size:.8rem;font-weight:700;color:var(--ink-soft);padding-bottom:2px}.runner-head{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-bottom:16px}.runner-head .counter{font-weight:700;font-variant-numeric:tabular-nums}.runner-head .timer{margin-left:auto;font-weight:700;font-variant-numeric:tabular-nums;padding:5px 12px;border:1.5px solid var(--line);border-radius:999px;background:#fff}.runner-head .timer.over{border-color:var(--wrong);color:var(--wrong)}.passage{font-family:var(--serif);font-size:1.02rem;line-height:1.7;background:#fdfcf8;border:1px solid var(--line);border-left:4px solid var(--ink);border-radius:6px;padding:18px 20px;margin-bottom:18px;white-space:pre-wrap}.prompt{font-size:1.08rem;font-weight:550;white-space:pre-wrap;margin-bottom:18px}.choice{display:flex;gap:12px;align-items:flex-start;width:100%;text-align:left;font:inherit;background:#fff;color:var(--ink);border:1.5px solid var(--line);border-radius:8px;padding:12px 14px;margin-bottom:10px;cursor:pointer}.choice:hover{border-color:var(--ink-soft)}.choice.picked{border-color:var(--cobalt);background:#eef1fc}.choice.right{border-color:var(--correct);background:var(--correct-bg)}.choice.wrongpick{border-color:var(--wrong);background:var(--wrong-bg)}.choice b{min-width:1.4em}.feedback{border-radius:8px;padding:14px 16px;margin:14px 0}.feedback.good{background:var(--correct-bg);border:1.5px solid var(--correct)}.feedback.bad{background:var(--wrong-bg);border:1.5px solid var(--wrong)}.feedback .verdict{font-weight:750;margin-bottom:6px}table{width:100%;border-collapse:collapse;font-size:.92rem}th{text-align:left;font-weight:700;border-bottom:2px solid var(--ink);padding:8px 10px}td{border-bottom:1px solid var(--line);padding:8px 10px;vertical-align:top}tr:hover td{background:#faf9f5}.num{font-variant-numeric:tabular-nums;text-align:right}.bar{height:10px;background:#ecebe5;border-radius:999px;overflow:hidden;min-width:90px}.bar i{display:block;height:100%;background:var(--cobalt);border-radius:999px}.bar.low i{background:var(--wrong)}.bar.mid i{background:var(--gold)}.pill{display:inline-block;font-size:.78rem;font-weight:700;padding:2px 9px;border-radius:999px;border:1.5px solid var(--line)}.pill.math{border-color:var(--cobalt);color:var(--cobalt)}.pill.ela{border-color:var(--ink);color:var(--ink)}.grid2{display:grid;grid-template-columns:1fr 1fr;gap:18px}@media (max-width: 680px){.grid2{grid-template-columns:1fr}}.stat-big{font-size:2.1rem;font-weight:780;font-stretch:90%;line-height:1;color:var(--cobalt)}.stat-label{font-size:.85rem;color:var(--ink-soft);font-weight:600}.mode-row{display:flex;gap:12px;flex-wrap:wrap}.mode-btn{flex:1 1 180px;text-align:left;font:inherit;cursor:pointer;background:#fff;border:1.5px solid var(--line);border-top:3px solid var(--cobalt);border-radius:var(--radius);padding:16px;transition:box-shadow .15s,transform .15s}.mode-btn:hover{border-color:var(--cobalt);border-top-color:var(--gold);box-shadow:0 4px 14px #2743c924;transform:translateY(-1px)}.mode-btn .mode-name{font-weight:750;margin-bottom:2px}.mode-btn .mode-meta{font-size:.84rem;color:var(--ink-soft)}@media (prefers-reduced-motion: no-preference){.feedback{animation:rise .18s ease-out}@keyframes rise{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}}mark.hl{background:#ffe58a;color:inherit;border-radius:2px;padding:0 1px}.choice-row{display:flex;align-items:stretch;gap:8px;margin-bottom:10px}.choice-row .choice{flex:1;margin-bottom:0}.choice.elim{opacity:.45}.choice.elim span,.choice.elim b{text-decoration:line-through}.elim-btn{font:inherit;font-weight:800;width:40px;border-radius:8px;border:1.5px solid var(--line);background:#fff;color:var(--ink-soft);cursor:pointer}.elim-btn:hover{border-color:var(--wrong);color:var(--wrong)}.elim-btn.on{border-color:var(--wrong);color:var(--wrong);background:var(--wrong-bg)}.toolbar-note{font-size:.8rem;color:var(--ink-soft);margin:4px 0 12px}.notepad{position:fixed;right:18px;bottom:18px;width:min(340px,calc(100vw - 36px));background:#fffdf3;border:1.5px solid var(--gold);border-radius:var(--radius);box-shadow:0 8px 28px #171d2e2e;padding:12px;z-index:50}.notepad textarea{width:100%;min-height:140px;border:none;background:transparent;resize:vertical;font:inherit;padding:0}.notepad textarea:focus{outline:none}.notepad .np-head{display:flex;align-items:center;margin-bottom:6px;font-weight:700;font-size:.85rem}.np-close{margin-left:auto;background:none;border:none;cursor:pointer;font:inherit;font-weight:700;color:var(--ink-soft)}button.tool-toggle{font:inherit;font-weight:650;border-radius:8px;padding:5px 12px;border:1.5px solid var(--line);background:#fff;cursor:pointer;color:var(--ink)}button.tool-toggle.on{border-color:var(--gold);background:#fff7dc}