:root{--bg:#06100c;--panel:#0b1712;--panel2:#102119;--line:#1e3b2e;--text:#e9fff2;--muted:#87a895;--green:#5cff9d;--green2:#1acb69;--red:#ff6b7a;--amber:#ffd166;--radius:18px}
*{box-sizing:border-box}html{background:var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}body{margin:0;background:radial-gradient(circle at 90% -10%,#123524 0,transparent 33%),var(--bg);min-height:100vh}.topbar{position:sticky;top:0;z-index:10;display:flex;justify-content:space-between;align-items:center;padding:16px max(18px,env(safe-area-inset-left));background:rgba(6,16,12,.88);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}.brand{color:var(--text);text-decoration:none;font-size:13px;letter-spacing:.09em;font-weight:800}.brand-mark{color:var(--green);margin-right:9px}.topmeta{font:700 12px ui-monospace,monospace;color:var(--green)}.shell{max-width:980px;margin:0 auto;padding:28px 20px 80px}.hero{display:flex;justify-content:space-between;gap:24px;align-items:center;padding:18px 2px 26px}.hero.compact{padding-bottom:16px}.eyebrow{color:var(--green);font:800 11px ui-monospace,monospace;letter-spacing:.14em;margin-bottom:8px}.hero h1,.login-card h1,.lesson h1,.result-hero h1{font-size:clamp(34px,7vw,64px);line-height:.95;letter-spacing:-.045em;margin:0 0 10px}.muted,.lead,.lesson-row p,.card p{color:var(--muted)}.score-orb{width:104px;height:104px;border:1px solid var(--line);border-radius:50%;display:flex;flex-direction:column;align-items:center;justify-content:center;background:var(--panel);box-shadow:0 0 60px rgba(92,255,157,.08)}.score-orb strong{font-size:36px;color:var(--green)}.score-orb span{font-size:10px;letter-spacing:.14em}.progress-track{height:5px;background:#102019;border-radius:20px;overflow:hidden;margin:4px 0 28px}.progress-track div{height:100%;background:linear-gradient(90deg,var(--green2),var(--green))}.level-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.level-card{display:block;text-decoration:none;color:var(--text);padding:22px;background:linear-gradient(145deg,var(--panel),#08130e);border:1px solid var(--line);border-radius:var(--radius);min-height:168px;transition:.18s transform,.18s border-color}.level-card:not(.locked):hover{transform:translateY(-2px);border-color:#2f6c4d}.level-card.locked{opacity:.42;cursor:default}.level-card.passed{border-color:#28633f}.level-num,.category{color:var(--muted);font:700 11px ui-monospace,monospace;letter-spacing:.11em}.level-card h2{font-size:22px;margin:12px 0 4px}.level-card p{color:var(--muted);margin:0 0 22px}.state{font:800 12px ui-monospace,monospace;color:var(--green);margin-bottom:8px}.level-card.locked .state{color:var(--muted)}.level-card small{display:inline-block;margin-right:12px;color:var(--muted)}.card{background:linear-gradient(145deg,var(--panel),#08130e);border:1px solid var(--line);border-radius:var(--radius);padding:24px;margin:16px 0}.login-wrap{min-height:75vh;display:grid;place-items:center}.login-card{width:min(480px,100%);padding:32px}.stack{display:grid;gap:16px;margin-top:28px}label{display:grid;gap:8px;color:var(--muted);font-size:13px;font-weight:700}input[type=text],input[type=password],input:not([type]){width:100%;padding:16px;border-radius:12px;border:1px solid var(--line);background:#07110d;color:var(--text);font-size:16px;outline:none}input:focus{border-color:var(--green)}.btn{display:inline-flex;justify-content:center;align-items:center;min-height:50px;padding:0 22px;border:0;border-radius:12px;text-decoration:none;font-weight:900;letter-spacing:.05em;cursor:pointer}.btn.primary{background:var(--green);color:#041009}.btn.full{width:100%;margin-top:18px}.alert{padding:14px;border-radius:12px}.alert.danger{background:#2d1116;color:#ffc7cd}.back{display:inline-block;color:var(--muted);text-decoration:none;margin-bottom:18px}.state-badge,.baseline,.complete-pill{padding:10px 14px;border:1px solid var(--line);border-radius:999px;font:800 12px ui-monospace,monospace;color:var(--green);background:var(--panel)}.baseline{display:inline-block;margin:8px 0 18px}.mission-card{border-color:#2b6b49}.section-title{margin-top:30px}.lesson-list{display:grid;gap:10px}.lesson-row{display:grid;grid-template-columns:42px 1fr 34px;align-items:center;gap:10px;padding:16px 18px;border:1px solid var(--line);background:var(--panel);border-radius:14px;color:var(--text);text-decoration:none}.lesson-row p{margin:3px 0 0;font-size:13px}.lesson-index{font:700 12px ui-monospace,monospace;color:var(--green)}.check{font-size:20px;color:var(--green)}.lesson{max-width:760px;margin:0 auto}.lesson .lead{font-size:18px}.lesson-body{font-size:17px;line-height:1.7;margin:30px 0}.lesson-body h2{font-size:26px;margin-top:30px}.lesson-body code{background:#13261d;padding:2px 6px;border-radius:6px;color:var(--green)}.callout,.example{padding:16px 18px;border-left:3px solid var(--green);background:#0d1c15;border-radius:8px;margin:18px 0}.example{font-family:ui-monospace,monospace}.complete-pill{display:block;text-align:center;margin-top:24px}.quiz-head{display:flex;justify-content:space-between;align-items:center}.quiz-head h1{margin:0;font-size:30px}.quiz-score{font:900 24px ui-monospace,monospace;color:var(--green)}.question h2{font-size:clamp(22px,4vw,32px);line-height:1.2;margin:15px 0 22px}.option{grid-template-columns:42px 1fr;display:grid;align-items:center;gap:12px;padding:15px;margin:10px 0;border:1px solid var(--line);border-radius:12px;color:var(--text);font-size:16px;background:#08130e;cursor:pointer}.option input{display:none}.option:has(input:checked){border-color:var(--green);background:#0f2419}.letter{display:grid;place-items:center;width:34px;height:34px;border-radius:9px;background:#13261d;font:900 14px ui-monospace;color:var(--green)}.result-hero{text-align:center;padding:40px 10px}.big-score{font-size:clamp(72px,18vw,150px);font-weight:1000;letter-spacing:-.07em;line-height:.9;color:var(--green)}.result-hero.fail .big-score{color:var(--red)}.result-hero h1{font-size:36px;margin-top:18px}.result-hero p{color:var(--muted)}.skill{display:flex;justify-content:space-between;padding:13px 0;border-bottom:1px solid var(--line)}.skill:last-child{border-bottom:0}.skill strong{color:var(--green)}.success{border-color:#2b6b49}.logout{text-align:center;margin-top:30px}.linkbtn{background:none;border:0;color:var(--muted);cursor:pointer;padding:10px}.footer-note{color:var(--muted);font-size:12px}
@media(max-width:700px){.shell{padding:20px 14px 64px}.level-grid{grid-template-columns:1fr}.hero{align-items:flex-start}.score-orb{width:86px;height:86px}.score-orb strong{font-size:30px}.level-card{min-height:150px}.topbar{padding:14px}.brand span:last-child{display:none}.lesson.card,.question.card{padding:20px 16px}.state-badge{font-size:10px}.quiz-head h1{font-size:23px}}

/* Build 002: public profiles, leaderboard, resume */
.public-hero{padding:72px 0 38px;max-width:900px}.public-hero h1{font-size:clamp(48px,9vw,96px);line-height:.92;letter-spacing:-.055em;margin:12px 0 18px}.public-hero p{font-size:clamp(17px,2.5vw,22px);max-width:700px;color:var(--muted);line-height:1.55}.home-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}.btn.secondary{background:#0b1812;color:var(--text);border:1px solid var(--line)}.btn.secondary:hover{border-color:var(--green)}.public-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;align-items:start}.public-card{margin:0;height:100%;scroll-margin-top:90px}.public-card h2,.leaderboard h2{font-size:30px;margin:8px 0 10px}.leaderboard{margin-top:18px;scroll-margin-top:90px}.leaderboard-head{display:flex;align-items:center;justify-content:space-between;gap:20px}.live-pill{font:900 11px ui-monospace,monospace;letter-spacing:.14em;color:var(--green);border:1px solid #2b6b49;background:#0d1c15;border-radius:999px;padding:8px 12px}.leaderboard-list{display:grid;margin-top:14px}.leaderboard-row{display:grid;grid-template-columns:58px minmax(0,1fr) 90px 100px;align-items:center;gap:12px;padding:15px 10px;border-top:1px solid var(--line)}.place{font:1000 17px ui-monospace,monospace;color:var(--green)}.player{min-width:0}.player strong{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.player span,.levels span,.xp span{display:block;margin-top:3px;font:700 10px ui-monospace,monospace;color:var(--muted);text-transform:uppercase;letter-spacing:.08em}.levels,.xp{text-align:right;font-weight:900}.empty-board{text-align:center;padding:42px 16px;color:var(--muted)}.empty-board strong{color:var(--text);font-size:20px}.resume-card{display:flex;align-items:center;justify-content:space-between;gap:22px;border-color:#2b6b49}.resume-card h2{margin:5px 0}.resume-card p{margin:0}.topmeta span{color:var(--text)}
@media(max-width:800px){.public-hero{padding-top:46px}.public-grid{grid-template-columns:1fr}.leaderboard-row{grid-template-columns:46px minmax(0,1fr) 68px 74px;padding-left:0;padding-right:0}.resume-card{align-items:flex-start;flex-direction:column}.resume-card .btn{width:100%}.home-actions .btn{flex:1 1 180px}.topmeta span{display:none}}