:root{
  --bg:#071329;--panel:#0e1d3b;--panel2:#122650;--line:#27406f;
  --text:#f4f7ff;--muted:#9fb0d0;--cyan:#62e7ff;--purple:#a889ff;
  --green:#5ee6a8;--yellow:#ffd76a;--red:#ff738c;--shadow:0 18px 45px rgba(0,0,0,.28);
}
*{box-sizing:border-box}
html,body{margin:0;min-height:100%;font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,sans-serif;background:
radial-gradient(circle at 15% 10%,rgba(98,231,255,.13),transparent 28%),
radial-gradient(circle at 85% 25%,rgba(168,137,255,.12),transparent 30%),var(--bg);color:var(--text)}
body:before{content:"";position:fixed;inset:0;pointer-events:none;opacity:.35;background-image:
radial-gradient(#fff 1px,transparent 1px);background-size:54px 54px}
button{font:inherit;color:inherit}
button,.brand{cursor:pointer}
.topbar{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;padding:14px clamp(16px,4vw,48px);background:rgba(7,19,41,.78);backdrop-filter:blur(16px);border-bottom:1px solid rgba(98,231,255,.1)}
.brand{border:0;background:none;display:flex;gap:10px;align-items:center;font-size:22px;font-weight:800}
.brand b{color:var(--cyan)}
.brand-orb{width:34px;height:34px;display:grid;place-items:center;border-radius:50%;background:linear-gradient(135deg,var(--cyan),var(--purple));color:#071329;box-shadow:0 0 25px rgba(98,231,255,.4)}
.top-stats{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end}
.pill{padding:7px 11px;border:1px solid var(--line);background:rgba(14,29,59,.8);border-radius:999px;color:var(--muted)}
.pill b{color:var(--text)}
main{width:min(1120px,92vw);margin:0 auto;min-height:calc(100vh - 128px);padding:34px 0 44px}
.site-footer{text-align:center;padding:18px 12px 26px;color:var(--muted);font-size:13px}
.site-footer a{color:var(--cyan);text-decoration:none}.site-footer a:hover{text-decoration:underline}
.hero{display:grid;grid-template-columns:1.25fr .75fr;gap:28px;align-items:center;padding:36px 0}
.hero h1{font-size:clamp(42px,7vw,78px);line-height:.95;margin:0 0 18px;letter-spacing:-.055em}
.hero h1 span{color:var(--cyan)}
.hero p{font-size:18px;line-height:1.65;color:var(--muted);max-width:650px}
.hero-art{min-height:300px;display:grid;place-items:center;position:relative}
.planet{width:230px;height:230px;border-radius:50%;background:radial-gradient(circle at 32% 28%,#9cefff,#4875d9 42%,#272c7c 72%);box-shadow:0 0 80px rgba(98,231,255,.25)}
.rocket{position:absolute;font-size:88px;filter:drop-shadow(0 12px 20px rgba(0,0,0,.4));animation:float 3s ease-in-out infinite}
@keyframes float{50%{transform:translateY(-16px) rotate(-4deg)}}
.card{background:linear-gradient(180deg,rgba(18,38,80,.94),rgba(14,29,59,.94));border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow)}
.section{margin-top:24px}.section-title{display:flex;align-items:end;justify-content:space-between;gap:12px;margin-bottom:14px}.section-title h2{margin:0;font-size:24px}.muted{color:var(--muted)}
.actions{display:flex;gap:10px;flex-wrap:wrap}
.primary,.secondary,.ghost{border:0;border-radius:14px;padding:12px 17px;font-weight:800}
.primary{background:linear-gradient(135deg,var(--cyan),#4ba8ff);color:#061225;box-shadow:0 10px 25px rgba(98,231,255,.18)}
.secondary{background:linear-gradient(135deg,var(--purple),#7c69dc);color:white}
.ghost{background:#102344;border:1px solid var(--line);color:var(--text)}
.primary:hover,.secondary:hover,.ghost:hover{transform:translateY(-1px)}
.grid{display:grid;gap:14px}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.stat{padding:18px}.stat .big{font-size:30px;font-weight:900}.stat .label{font-size:13px;color:var(--muted);margin-top:4px}
.dashboard-head{padding:22px;display:flex;justify-content:space-between;gap:20px;align-items:center}.avatar{font-size:58px}.dash-name{font-size:28px;font-weight:900}.progress{height:9px;background:#08162e;border-radius:999px;overflow:hidden;margin-top:10px}.progress>i{display:block;height:100%;background:linear-gradient(90deg,var(--cyan),var(--purple));border-radius:inherit}
.world{padding:20px;position:relative;overflow:hidden}.world.locked{opacity:.56}.world-icon{font-size:44px}.world h3{margin:8px 0 5px}.world p{margin:0;color:var(--muted);font-size:14px}.lock{position:absolute;right:16px;top:16px;font-size:22px}
.level-list{display:grid;grid-template-columns:repeat(5,1fr);gap:10px}.level-node{padding:14px 8px;text-align:center;border:1px solid var(--line);border-radius:17px;background:#0c1a35}.level-node.done{border-color:rgba(94,230,168,.55)}.level-node.current{border-color:var(--cyan);box-shadow:0 0 22px rgba(98,231,255,.12)}.level-node.locked{opacity:.45}
.reward-card{padding:20px}.reward-icon{font-size:35px}.reward-card h3{margin:8px 0}.reward-card p{font-size:13px;color:var(--muted);line-height:1.5}.badge{display:flex;gap:12px;align-items:center;padding:14px;border:1px solid var(--line);border-radius:16px;background:#0b1933}.badge .ico{font-size:34px}.badge.locked{opacity:.42}.badge small{color:var(--muted)}
.mission{padding:16px}.mission-top{display:flex;justify-content:space-between;gap:10px}.mission h3{margin:0;font-size:15px}.mission .reward{color:var(--yellow);font-weight:800}.mission-bar{height:7px;background:#071329;border-radius:999px;margin-top:12px;overflow:hidden}.mission-bar i{display:block;height:100%;background:var(--green)}
.screen-head{display:flex;align-items:center;gap:12px;margin-bottom:18px}.back{border:1px solid var(--line);background:#0d1c38;border-radius:12px;padding:9px 12px}
.game-shell{max-width:800px;margin:auto}.game-hud{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;margin-bottom:14px}.hud{padding:12px;text-align:center;background:#0d1c38;border:1px solid var(--line);border-radius:14px}.hud b{display:block;font-size:19px}.hud small{color:var(--muted)}
.question-card{padding:34px 20px;text-align:center}.world-label{color:var(--cyan);font-weight:800;font-size:13px;text-transform:uppercase;letter-spacing:.12em}.question{font-size:clamp(45px,10vw,76px);font-weight:950;margin:15px 0 8px;letter-spacing:-.04em}.timer{height:10px;background:#071329;border-radius:999px;overflow:hidden;max-width:520px;margin:0 auto 22px}.timer i{display:block;height:100%;background:linear-gradient(90deg,var(--green),var(--yellow),var(--red));transition:width .2s linear}
.hearts{font-size:22px;letter-spacing:3px}.feedback{min-height:25px;font-weight:800;margin:10px}.feedback.good{color:var(--green)}.feedback.bad{color:var(--red)}
.keypad{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;max-width:500px;margin:18px auto 0}.key{min-height:58px;border:1px solid var(--line);background:#102344;border-radius:15px;font-size:21px;font-weight:850}.key:hover{background:#18315e}.key.submit{background:linear-gradient(135deg,var(--cyan),#4ba8ff);color:#061225}.key.clear{background:#271a38}
.result{text-align:center;padding:35px}.result-score{font-size:64px;font-weight:950}.stars{font-size:38px;margin:8px}
.toast{position:fixed;z-index:50;right:18px;bottom:18px;background:#132a52;border:1px solid var(--cyan);padding:13px 17px;border-radius:14px;box-shadow:var(--shadow);transform:translateY(20px);opacity:0;pointer-events:none;transition:.25s}.toast.show{transform:none;opacity:1}
.overlay{position:fixed;inset:0;z-index:60;background:rgba(3,10,24,.78);backdrop-filter:blur(8px);display:grid;place-items:center;padding:20px}.hidden{display:none}.level-card{width:min(460px,100%);text-align:center;padding:35px;border:1px solid var(--cyan);border-radius:28px;background:linear-gradient(180deg,#132b59,#0a1730);box-shadow:0 0 80px rgba(98,231,255,.22)}.sparkles{color:var(--yellow);font-size:28px}.level-emoji{font-size:74px}.level-card h2{font-size:42px;margin:5px 0}.level-card p{color:var(--muted)}
.empty{padding:24px;color:var(--muted);text-align:center}
@media(max-width:800px){.hero{grid-template-columns:1fr;text-align:center}.hero p{margin-left:auto;margin-right:auto}.hero-art{min-height:230px}.grid-3,.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}.game-hud{grid-template-columns:repeat(3,1fr)}.level-list{grid-template-columns:repeat(5,1fr)}}
@media(max-width:560px){main{width:min(94vw,520px);padding-top:22px}.topbar{padding:11px 12px}.brand{font-size:18px}.brand-orb{width:30px;height:30px}.pill{font-size:12px;padding:6px 8px}.hero{padding:22px 0}.hero h1{font-size:48px}.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}.dashboard-head{align-items:flex-start}.level-list{gap:6px}.level-node{padding:10px 3px;font-size:12px}.game-hud{grid-template-columns:repeat(3,1fr)}.hud{padding:9px 4px}.hud:nth-child(4),.hud:nth-child(5){display:none}.question-card{padding:24px 12px}.key{min-height:54px}.result-score{font-size:54px}}

/* M3 Learning Platform */
.nav-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
.feature-card{padding:20px;text-align:left;border:1px solid var(--line);background:linear-gradient(180deg,#122650,#0e1d3b);border-radius:20px;cursor:pointer;transition:.2s}
.feature-card:hover{transform:translateY(-3px);border-color:var(--cyan)}
.feature-card .fi{font-size:38px}.feature-card h3{margin:10px 0 5px}.feature-card p{margin:0;color:var(--muted);font-size:13px;line-height:1.5}
.topic{padding:18px}.topic h3{margin:8px 0}.topic p{color:var(--muted);line-height:1.55;font-size:14px}
.learn-content{padding:24px}.formula{font-size:34px;font-weight:950;text-align:center;padding:20px;border-radius:16px;background:#091a35;margin:15px 0}
.example{padding:15px;border-left:3px solid var(--cyan);background:#0a1931;border-radius:10px;color:var(--muted);line-height:1.55}
.quiz-card{padding:26px;text-align:center}.quiz-question{font-size:clamp(34px,7vw,60px);font-weight:950;margin:18px 0}.quiz-options{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;max-width:650px;margin:0 auto}.quiz-option{padding:17px;border:1px solid var(--line);background:#102344;border-radius:15px;font-size:20px;font-weight:850}.quiz-option.correct{border-color:var(--green);background:rgba(94,230,168,.12)}.quiz-option.wrong{border-color:var(--red);background:rgba(255,115,140,.12)}
.worksheet-controls{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.field{padding:13px;border:1px solid var(--line);border-radius:13px;background:#0a1931;color:var(--text);width:100%}.worksheet-preview{background:white;color:#111;padding:26px;border-radius:18px;margin-top:18px}.worksheet-preview h2{text-align:center}.worksheet-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin-top:18px}.worksheet-item{padding:10px 4px;border-bottom:1px dashed #aaa}
.progress-row{display:grid;grid-template-columns:150px 1fr 60px;gap:10px;align-items:center;margin:12px 0}.progress-row .progress{margin:0}
.answer-input{position:absolute;opacity:0;pointer-events:none;width:1px;height:1px}
.keyboard-hint{font-size:12px;color:var(--muted);margin-top:8px}
.print-only{display:none}
@media(max-width:800px){.nav-grid{grid-template-columns:repeat(2,1fr)}.worksheet-controls{grid-template-columns:1fr}.progress-row{grid-template-columns:110px 1fr 48px}}
@media(max-width:560px){.quiz-options{grid-template-columns:1fr}.nav-grid{grid-template-columns:1fr}.worksheet-preview{padding:18px}.worksheet-grid{grid-template-columns:1fr}}
@media print{
  body{background:white!important;color:#111}.topbar,.site-footer,.screen-head,.no-print{display:none!important}
  main{width:100%;padding:0;min-height:0}.worksheet-preview{box-shadow:none;border:0;border-radius:0;margin:0}.print-only{display:block}
}

/* M4 */
.feature-card{min-height:150px}
.auth-tabs{display:flex;gap:10px;margin-bottom:16px}.auth-form{display:grid;gap:10px;max-width:520px}.field{width:100%;padding:13px 14px;border-radius:13px;border:1px solid var(--line);background:#091a35;color:var(--text);outline:none}.field:focus{border-color:var(--cyan);box-shadow:0 0 0 3px rgba(98,231,255,.08)}.hidden{display:none!important}.account-hero{display:flex;align-items:center;gap:16px;padding:6px 0 14px}.online-pill{display:inline-block;margin-top:7px;padding:5px 9px;border-radius:999px;background:rgba(94,230,168,.1);color:var(--green);font-size:12px}.leader-list{display:grid;gap:10px}.leader-row{display:grid;grid-template-columns:55px 1fr auto;gap:12px;align-items:center;padding:14px;border:1px solid var(--line);border-radius:16px;background:#0b1933}.rank{font-size:24px;text-align:center}.leader-name{display:grid;gap:3px}.leader-name small{color:var(--muted)}.leader-row strong{font-size:18px}.site-footer{padding:22px 12px 30px}.site-footer a{display:inline-flex;align-items:center;gap:8px;padding:9px 16px;border:1px solid rgba(98,231,255,.28);border-radius:999px;background:linear-gradient(135deg,rgba(98,231,255,.08),rgba(168,137,255,.08));box-shadow:0 8px 24px rgba(0,0,0,.16);font-weight:800;letter-spacing:.01em}.site-footer a:before{content:'✦';font-size:11px}.site-footer a:after{content:'↗';font-size:11px;opacity:.75}.site-footer a:hover{border-color:var(--cyan);text-decoration:none;transform:translateY(-1px)}
@media(max-width:650px){.leader-row{grid-template-columns:42px 1fr auto}.leader-row strong{font-size:14px}.site-footer a{padding:8px 13px;font-size:12px}}
/* M5.2 Sound & input polish */
.answer-input{display:block;width:min(330px,86vw);height:58px;margin:12px auto 4px;padding:8px 16px;border:2px solid var(--line);border-radius:16px;background:#08182f;color:var(--text);font-size:30px;font-weight:900;text-align:center;outline:none;box-sizing:border-box}
.answer-input:focus{border-color:var(--cyan);box-shadow:0 0 0 4px rgba(98,231,255,.08)}
.settings-list{display:grid;gap:12px;max-width:760px}.setting-row{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:17px;border:1px solid var(--line);border-radius:16px;background:#0b1933}.setting-row input[type=checkbox]{width:22px;height:22px;accent-color:#5ee7ff}.setting-row input[type=range]{width:min(280px,45vw);accent-color:#5ee7ff}
/* M5.2 Admin */
.danger{background:rgba(255,115,140,.1);border:1px solid rgba(255,115,140,.35);color:#ff9aae;border-radius:12px;padding:9px 12px;font-weight:800;cursor:pointer}.danger:hover{border-color:#ff738c;transform:translateY(-1px)}.small-delete{padding:7px 9px;font-size:12px}.detail-actions{justify-content:flex-end;margin:12px 0}.admin-modal{position:fixed;inset:0;z-index:100;background:rgba(3,10,24,.8);backdrop-filter:blur(8px);display:grid;place-items:center;padding:20px}.admin-modal-card{width:min(520px,94vw);padding:24px;box-shadow:0 20px 80px rgba(0,0,0,.4)}
/* M6 Teacher + Parent dashboards */
.admin-top{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:22px}.admin-brand{display:flex;align-items:center;gap:12px}.admin-brand .orb{width:42px;height:42px;display:grid;place-items:center;border-radius:14px;background:linear-gradient(135deg,var(--cyan),#8c7cff);color:#061225;font-weight:950}.actions{display:flex;flex-wrap:wrap;gap:9px}.admin-table-wrap{overflow:auto}.detail-stat{padding:13px;border:1px solid var(--line);border-radius:13px;background:#0b1933}.secondary{padding:11px 14px;border:1px solid rgba(98,231,255,.35);border-radius:12px;background:rgba(98,231,255,.08);color:var(--text);font-weight:800;cursor:pointer}.secondary:hover{border-color:var(--cyan);transform:translateY(-1px)}