:root{--ink:#30323a;--muted:#6f727a;--line:#e8dfe2;--aqua:#d8f3f1;--aqua-strong:#4aaeb2;--rose:#ffd6dc;--rose-strong:#d66d86;--amber:#fce9bf;--amber-strong:#d79c32;--green:#d9f1df;--green-strong:#4d9e70;--violet:#ddd7f3}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:linear-gradient(145deg,#fff8f4,#f5fcfb 55%,#faf7ff);color:var(--ink);font-family:"Source Sans 3",sans-serif;margin:0;min-height:100vh}button{cursor:pointer;font:inherit;-webkit-tap-highlight-color:transparent}.topbar{align-items:center;background:rgba(255,253,251,.95);border-bottom:1px solid var(--line);display:flex;justify-content:space-between;padding:12px clamp(18px,4vw,52px);position:relative;z-index:20}.brand{align-items:center;color:inherit;display:flex;gap:11px;text-decoration:none}.brand>span:last-child{display:flex;flex-direction:column}.brand strong{font:900 21px/1 Nunito,sans-serif}.brand small{color:var(--muted);font-size:11px;margin-top:3px}.back-link{background:var(--amber);border:1px solid #ead7ae;border-radius:999px;color:var(--ink);font:900 13px Nunito,sans-serif;padding:9px 15px;text-decoration:none}
main{padding:40px clamp(12px,4vw,50px) 58px}.hero{margin:0 auto 24px;max-width:1060px;text-align:center}.eyebrow,.modal-kicker,.panel-kicker{color:#876421;font:900 12px Nunito,sans-serif;letter-spacing:.12em;text-transform:uppercase}.hero h1{font:900 clamp(34px,5vw,60px)/1.05 Nunito,sans-serif;letter-spacing:-.035em;margin:8px 0 12px}.hero h1 em{color:var(--rose-strong);font-style:normal}.hero>p{color:var(--muted);font-size:clamp(16px,2vw,20px);margin:0 auto;max-width:760px}.hero-pills{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-top:17px}.hero-pills span{background:rgba(255,255,255,.8);border:1px solid var(--line);border-radius:999px;font:800 13px Nunito,sans-serif;padding:7px 12px}
.game-shell{background:rgba(255,255,255,.92);border:1px solid var(--line);border-radius:25px;box-shadow:0 24px 65px rgba(66,52,60,.12);margin:0 auto;max-width:1120px;overflow:hidden;position:relative}.toolbar{align-items:center;background:#fff;display:flex;gap:18px;justify-content:space-between;padding:13px 17px}.stats{display:flex;flex-wrap:wrap;gap:7px}.stats span{background:#fff;border:1px solid var(--line);border-radius:12px;color:var(--muted);font:900 9px Nunito,sans-serif;letter-spacing:.07em;min-width:76px;padding:7px 9px}.stats strong{color:var(--ink);display:block;font-size:17px;letter-spacing:0;margin-top:1px}.tools{display:flex;flex-wrap:wrap;gap:6px;justify-content:flex-end}.tools button{background:#fff;border:1px solid var(--line);border-radius:11px;color:var(--ink);font:900 12px Nunito,sans-serif;padding:9px 10px}.tools button:hover{background:var(--aqua)}.wave-timer{background:#eee9eb;height:6px}.wave-timer i{background:linear-gradient(90deg,var(--aqua-strong),var(--amber-strong),var(--rose-strong));display:block;height:100%;width:100%}.wave-timer.urgent{animation:timerPulse .75s ease-in-out infinite alternate;background:#f6cbd4}@keyframes timerPulse{to{box-shadow:0 0 0 4px rgba(214,109,134,.14)}}
.play-area{background:linear-gradient(150deg,rgba(216,243,241,.43),rgba(255,255,255,.92),rgba(252,233,191,.4));min-height:650px;padding:20px}.mission-card{align-items:center;background:#fff;border:1px solid var(--line);border-radius:20px;display:flex;gap:15px;margin-bottom:15px;padding:14px 18px}.mission-icon{align-items:center;background:linear-gradient(135deg,var(--aqua),var(--amber));border-radius:16px;display:flex;font-size:30px;height:58px;justify-content:center;min-width:58px}.mission-card small{color:#8a6924;font:900 11px Nunito,sans-serif;letter-spacing:.08em;text-transform:uppercase}.mission-card h2{font:900 clamp(22px,3vw,29px)/1.12 Nunito,sans-serif;margin:3px 0}.mission-card p{color:var(--muted);margin:0}.game-layout{display:grid;gap:17px;grid-template-columns:minmax(420px,1.35fr) minmax(280px,.65fr)}
.tower-card{background:#fff;border:1px solid var(--line);border-radius:21px;box-shadow:0 12px 28px rgba(62,57,62,.07);overflow:hidden;padding:16px 18px 12px}.danger-label{border-bottom:2px dashed rgba(214,109,134,.45);color:#aa5368;font:900 10px Nunito,sans-serif;letter-spacing:.1em;margin-bottom:8px;padding:0 0 6px;text-align:right}.tower-board{background-color:#fafafa;background-image:linear-gradient(rgba(80,82,91,.055) 1px,transparent 1px),linear-gradient(90deg,rgba(80,82,91,.055) 1px,transparent 1px);background-size:calc(100% / 6) calc(100% / 8);border:2px solid #eee6e9;border-radius:15px 15px 8px 8px;display:grid;gap:5px;grid-template-columns:repeat(6,1fr);height:440px;overflow:hidden;padding:7px}.tower-column{align-items:stretch;display:flex;flex-direction:column-reverse;gap:5px;min-width:0}.number-block{align-items:center;background:var(--block-color);border:3px solid rgba(255,255,255,.82);border-radius:12px;box-shadow:inset -5px -7px 0 rgba(41,44,53,.07),0 4px 8px rgba(45,48,58,.13);color:var(--ink);display:flex;flex:0 0 calc((100% - 35px) / 8);font:900 clamp(16px,2.4vw,24px) Nunito,sans-serif;justify-content:center;min-height:0;padding:0;position:relative;transition:transform .18s ease,filter .18s ease}.number-block::after{background:rgba(255,255,255,.52);border-radius:5px;content:"";height:5px;left:9px;position:absolute;right:23px;top:7px}.number-block:hover{filter:brightness(1.03);transform:translateY(-2px)}.number-block.selected{box-shadow:0 0 0 4px rgba(74,174,178,.3),inset -5px -7px 0 rgba(41,44,53,.06);outline:3px solid var(--aqua-strong);transform:scale(.94)}.number-block.new{animation:blockRise .42s ease-out}.number-block.clearing{animation:blockClear .45s ease forwards;pointer-events:none}@keyframes blockRise{from{opacity:0;transform:translateY(45px) scale(.8)}to{opacity:1;transform:none}}@keyframes blockClear{35%{filter:brightness(1.2);transform:scale(1.12) rotate(2deg)}100%{opacity:0;transform:scale(.15) rotate(-10deg)}}.ground{align-items:center;color:#866621;display:flex;font:900 10px Nunito,sans-serif;gap:9px;letter-spacing:.08em;margin-top:8px}.ground span{background:#d5ae61;border-radius:99px;flex:1;height:5px}
.control-card{align-self:center;background:#fff;border:1px solid var(--line);border-radius:21px;box-shadow:0 12px 28px rgba(62,57,62,.07);padding:22px}.selected-values{align-items:center;background:#faf8f8;border:1px dashed #d9cfd3;border-radius:15px;display:flex;flex-wrap:wrap;gap:7px;justify-content:center;margin:9px 0 12px;min-height:68px;padding:10px}.selected-values>span:first-child:last-child{color:var(--muted);font-size:14px}.selected-chip{align-items:center;background:var(--violet);border-radius:10px;display:flex;font:900 18px Nunito,sans-serif;height:42px;justify-content:center;min-width:48px;padding:0 10px}.sum-box{align-items:center;background:linear-gradient(135deg,var(--aqua),#fff,var(--amber));border:2px solid #fff;border-radius:17px;display:flex;justify-content:space-between;padding:14px 18px}.sum-box small{color:var(--muted);font:900 11px Nunito,sans-serif;letter-spacing:.09em}.sum-box strong{font:900 38px Nunito,sans-serif}.feedback{border-radius:14px;color:var(--muted);font-weight:700;line-height:1.4;margin:12px 0;min-height:60px;padding:11px}.feedback.good{background:#e8f7ed;color:#286744}.feedback.hint{background:#fff4dc;color:#775817}.clear-choice{background:#fff;border:1px solid var(--line);border-radius:12px;color:var(--ink);font:900 13px Nunito,sans-serif;padding:10px;width:100%}.clear-choice:disabled{cursor:default;opacity:.45}.next-wave{align-items:center;border-top:1px solid var(--line);color:var(--muted);display:flex;font-size:13px;justify-content:space-between;margin-top:15px;padding-top:12px}.next-wave b{color:var(--rose-strong);font:900 20px Nunito,sans-serif}
.layer{align-items:center;background:rgba(255,250,248,.985);display:none;inset:0;justify-content:center;overflow:auto;padding:22px;position:absolute;z-index:30}.layer.show{display:flex}.modal{background:#fff;border:1px solid var(--line);border-radius:25px;box-shadow:0 28px 80px rgba(26,27,32,.25);max-width:690px;padding:30px;text-align:center;width:100%}.modal-icon{font-size:48px}.modal h2{font:900 clamp(27px,4vw,38px)/1.12 Nunito,sans-serif;margin:6px 0 8px}.modal>p{color:var(--muted);font-size:16px;line-height:1.45;margin:0 auto 18px;max-width:570px}.modal-steps{display:grid;gap:8px;grid-template-columns:repeat(3,1fr);margin:18px 0}.modal-steps span{background:#fffaf3;border:1px solid var(--line);border-radius:14px;font:800 13px Nunito,sans-serif;padding:11px 7px}.modal-steps b{align-items:center;background:var(--aqua);border-radius:50%;display:flex;height:27px;justify-content:center;margin:0 auto 6px;width:27px}.primary-action{background:linear-gradient(135deg,#bdebf0,#f6e4c1);border:0;border-radius:14px;color:#24484d;font:900 15px Nunito,sans-serif;padding:13px 22px}.finish-stats{display:flex;gap:8px;justify-content:center;margin:18px 0}.finish-stats span{background:#fff;border:1px solid var(--line);border-radius:13px;min-width:100px;padding:10px}.finish-stats strong{display:block;font:900 21px Nunito,sans-serif}
.pause-cover{align-items:center;background:rgba(255,253,250,.92);display:flex;inset:0;justify-content:center;position:absolute;z-index:25}.pause-cover[hidden]{display:none}.pause-cover>div{align-items:center;background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:0 20px 50px rgba(42,45,52,.18);display:flex;flex-direction:column;font-size:42px;gap:9px;padding:28px}.pause-cover strong{font:900 22px Nunito,sans-serif}.pause-cover button{background:var(--aqua);border:0;border-radius:12px;font-weight:900;padding:10px 24px}.sr-only{clip:rect(0 0 0 0);clip-path:inset(50%);height:1px;overflow:hidden;position:absolute;white-space:nowrap;width:1px}
.teacher-guide{background:linear-gradient(135deg,#fff0dc,#edfafa);border:1px solid var(--line);border-radius:24px;display:grid;gap:22px;grid-template-columns:260px 1fr;margin:24px auto 0;max-width:1120px;padding:24px}.teacher-guide__intro>span{color:#945526;font:900 11px Nunito,sans-serif;letter-spacing:.1em;text-transform:uppercase}.teacher-guide h2{font:900 25px/1.15 Nunito,sans-serif;margin:7px 0}.teacher-guide p{color:#60636c;line-height:1.45;margin:0}.teacher-guide__grid{display:grid;gap:10px;grid-template-columns:repeat(3,1fr)}.teacher-guide article{background:rgba(255,255,255,.8);border-radius:15px;padding:15px}.teacher-guide h3{font:900 14px Nunito,sans-serif;margin:0 0 5px}footer{border-top:1px solid var(--line);color:var(--muted);display:flex;flex-wrap:wrap;font-size:13px;gap:14px 22px;justify-content:center;padding:17px}footer a{color:inherit;text-decoration:none}
.game-shell:fullscreen,.game-shell:-webkit-full-screen{background:#fffdfb;border:0;border-radius:0;display:flex;flex-direction:column;height:100vh;height:100dvh;max-width:none;overflow:hidden}.game-shell:fullscreen .toolbar,.game-shell:fullscreen .wave-timer,.game-shell:-webkit-full-screen .toolbar,.game-shell:-webkit-full-screen .wave-timer{flex:0 0 auto}.game-shell:fullscreen .play-area,.game-shell:-webkit-full-screen .play-area{flex:1;min-height:0;overflow:auto}.game-shell:fullscreen .tower-board,.game-shell:-webkit-full-screen .tower-board{height:min(61vh,570px)}
@media(max-width:820px){main{padding:28px 10px 40px}.toolbar{align-items:stretch;flex-direction:column}.stats,.tools{justify-content:center}.stats span{flex:1}.game-layout{grid-template-columns:minmax(0,1.15fr) minmax(250px,.85fr)}.teacher-guide{grid-template-columns:1fr}.teacher-guide__grid{grid-template-columns:1fr}.tower-board{height:430px}}
@media(max-width:620px){.brand small{display:none}.back-link{font-size:12px;padding:8px 10px}.hero h1{font-size:34px}.play-area{padding:12px}.tools button{flex:1;padding:8px 4px}.game-layout{grid-template-columns:1fr}.tower-board{height:400px}.control-card{padding:15px}.modal{padding:24px 15px}.modal-steps{gap:5px}.modal-steps span{font-size:11px;padding:8px 3px}.finish-stats span{min-width:0;padding:8px}.game-shell:fullscreen .play-area,.game-shell:-webkit-full-screen .play-area{overflow:auto}.game-shell:fullscreen .tower-board,.game-shell:-webkit-full-screen .tower-board{height:390px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01s!important;transition-duration:.01s!important}}