:root{--ink:#252925;--muted:#6f746e;--paper:#fbf7ef;--cream:#f3ead8;--red:#e22d2d;--yellow:#efb51b;--line:rgba(37,41,37,.18);--green:#557b59}
*{box-sizing:border-box}
html,body{width:100%;height:100%;margin:0;overflow:hidden}
body{background:var(--paper);color:var(--ink);font-family:"Manrope",sans-serif}
.game-header{height:68px;display:flex;align-items:center;gap:24px;padding:0 clamp(16px,4vw,58px);border-bottom:1px solid var(--ink);background:rgba(251,247,239,.96)}
.game-brand{display:flex;align-items:center;gap:11px;margin-right:auto;color:inherit;text-decoration:none;white-space:nowrap}
.game-brand>span{width:32px;height:32px;display:grid;place-items:center;border:1px solid var(--ink);background:var(--yellow)}
.game-brand strong{font:600 17px "Newsreader",serif}
.game-header nav{display:flex;align-items:center;gap:clamp(10px,1.8vw,24px)}
.game-header nav a{padding:5px 0;border-bottom:1px solid transparent;color:inherit;font-size:10px;font-weight:600;text-decoration:none;white-space:nowrap}
.game-header nav a:hover{border-color:var(--red);color:var(--red)}
#game{height:calc(100dvh - 68px)}
.screen{height:100%;position:relative;display:flex;flex-direction:column;padding:clamp(18px,3vw,42px) clamp(18px,5vw,76px);animation:arrive .32s ease-out}
.eyebrow{margin:0 0 8px;color:var(--red);font-size:9px;font-weight:700;letter-spacing:.17em;text-transform:uppercase}
.screen h1{margin:0;font:600 clamp(34px,5vw,68px)/.95 "Newsreader",serif;letter-spacing:-.035em}
.screen-copy{margin:14px 0 0;color:var(--muted);font:500 clamp(18px,2vw,25px) "Newsreader",serif}
.intro-screen{display:grid;grid-template-columns:minmax(400px,1.18fr) minmax(300px,.82fr);align-items:center;gap:5vw}
.intro-art{height:min(70vh,680px);display:flex;align-items:center;justify-content:center}
.intro-art img{width:100%;height:100%;object-fit:contain}
.intro-actions{display:flex;align-items:center;gap:18px;margin-top:28px}
.primary-action{min-width:130px;padding:13px 20px;border:1px solid var(--ink);background:var(--red);color:#fff;cursor:pointer;font-weight:700}
.primary-action:hover{background:var(--ink)}
.lesson-screen .lesson-title,.quiz-screen .quiz-title{flex:none;text-align:center}
.compare-grid{min-height:0;flex:1;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));margin-top:14px;border:1px solid var(--line)}
.brick-panel{min-width:0;min-height:0;display:flex;align-items:center;justify-content:center;padding:18px;background:rgba(255,255,255,.45)}
.brick-panel+ .brick-panel{border-left:1px solid var(--line)}
.brick-group{display:grid;align-items:center;justify-content:center}
.brick-group img{width:100%;height:100%;display:block;object-fit:contain}
.brick-group.one{width:min(36vh,280px);aspect-ratio:1}
.brick-group.ten{width:min(90%,760px);grid-template-columns:repeat(10,minmax(0,1fr));gap:3px;margin-inline:auto}
.brick-group.hundred{width:min(56vh,480px);aspect-ratio:1;grid-template-columns:repeat(10,minmax(0,1fr));grid-template-rows:repeat(10,minmax(0,1fr));gap:1px}
.brick-group.ten img,.brick-group.hundred img{min-width:0}
.brick-group.thousand{width:min(76vw,760px);display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:clamp(8px,1.2vw,16px);margin-inline:auto}
.hundred-set{width:100%;aspect-ratio:1;display:block;border:1px solid rgba(37,41,37,.16);background-image:url("brick.png");background-repeat:repeat;background-size:10% 10%;background-color:rgba(255,255,255,.72)}
.brick-target{border:0;background:transparent;cursor:default}
.single-brick-stage{min-height:0;flex:1;display:flex;align-items:center;justify-content:center;margin-top:12px;border:1px solid var(--line);background:rgba(255,255,255,.45)}
.next-action{position:absolute;right:clamp(18px,5vw,76px);bottom:clamp(16px,3vh,32px);min-width:108px;padding:12px 18px;border:1px solid var(--ink);background:var(--ink);color:#fff;cursor:pointer;font-weight:700}
.next-action:hover{background:var(--red)}
.lesson-actions{position:absolute;right:clamp(18px,5vw,76px);bottom:clamp(16px,3vh,32px);left:clamp(18px,5vw,76px);display:flex;align-items:center;justify-content:space-between;pointer-events:none}
.lesson-actions .next-action{position:static}
.previous-action{min-width:108px;padding:12px 18px;border:1px solid var(--ink);background:var(--paper);color:var(--ink);cursor:pointer;font-weight:700;pointer-events:auto}
.lesson-actions .next-action{pointer-events:auto}
.previous-action:hover{background:var(--yellow)}
.word-toast{position:fixed;z-index:5;left:50%;top:50%;padding:12px 24px;border:1px solid var(--ink);background:var(--yellow);font:600 clamp(25px,4vw,44px) "Newsreader",serif;opacity:0;pointer-events:none;transform:translate(-50%,-42%);transition:opacity .14s,transform .14s}
.word-toast.show{opacity:1;transform:translate(-50%,-50%)}
.quiz-screen{align-items:center}
.quiz-visual{min-height:0;flex:1;width:100%;display:flex;align-items:center;justify-content:center;padding:8px}
.quiz-screen .brick-group.one{width:min(31vh,240px)}
.quiz-screen .brick-group.ten{width:min(78%,680px)}
.quiz-screen .brick-group.hundred{width:min(43vh,390px)}
.quiz-screen .brick-group.thousand{width:min(40vh,350px)}
.answer-options{width:min(900px,100%);display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.answer-options button{padding:13px 8px;border:1px solid var(--ink);background:#fff;color:var(--ink);cursor:pointer;font-size:clamp(12px,1.5vw,17px);font-weight:700}
.answer-options button:hover,.answer-options button:focus-visible{background:var(--yellow)}
.answer-options button.correct{background:var(--green);color:#fff}
.answer-options button.wrong{background:var(--red);color:#fff}
.quiz-progress{margin:0 0 6px;color:var(--muted);font-size:10px;letter-spacing:.12em}
.result-screen{display:grid;grid-template-columns:minmax(300px,1fr) minmax(320px,.9fr);align-items:center;gap:clamp(24px,6vw,90px);background:var(--paper);text-align:left}
.result-screen::before{display:none}
.result-art{min-height:0;height:100%;display:flex;align-items:center;justify-content:center}
.result-art img{width:100%;height:100%;max-height:72vh;display:block;object-fit:contain}
.result-card{width:100%;padding:clamp(24px,4vw,52px);border:1px solid var(--line);background:rgba(255,255,255,.56);color:var(--ink);box-shadow:none;backdrop-filter:none}
.result-card h1{font-size:clamp(35px,5vw,62px);line-height:1.05}
.result-card p{margin:18px 0 28px;color:var(--muted);font-size:clamp(16px,2vw,22px);line-height:1.5}
.result-actions{display:flex;gap:10px;flex-wrap:wrap}
.secondary-action{min-width:130px;padding:13px 20px;border:1px solid var(--ink);background:transparent;color:var(--ink);cursor:pointer;font-weight:700}
.secondary-action:hover{background:var(--yellow)}
@keyframes arrive{from{opacity:0;transform:translateY(8px)}
}
@media(max-width:800px){.game-header{height:auto;min-height:62px;padding:8px 12px}
.game-brand strong{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}
.game-header nav{width:100%;justify-content:flex-end;gap:7px 12px;flex-wrap:wrap}
.game-header nav a{font-size:8px}
#game{height:calc(100dvh - 62px)}
.intro-screen{grid-template-columns:1fr;grid-template-rows:minmax(0,1fr) auto;gap:8px;text-align:center}
.intro-actions{justify-content:center}
.intro-art{height:auto;min-height:0}
.result-screen{grid-template-columns:1fr;grid-template-rows:minmax(0,1fr) auto;gap:8px;text-align:center}
.result-art img{max-height:45vh}
.result-card{padding:20px}
.single-brick-stage{margin-top:7px}
.brick-group.ten{width:96%;gap:1px}
.brick-group.thousand{width:min(82vw,620px);grid-template-columns:repeat(5,minmax(0,1fr));margin-inline:auto}
.answer-options{gap:5px}
.next-action{bottom:10px;right:12px}
.lesson-actions{right:12px;bottom:10px;left:12px}
}
@media(max-width:520px){.screen{padding:12px}
.screen h1{font-size:31px}
.screen-copy{font-size:17px}
.result-art img{max-height:40vh}
.result-card{padding:15px}
.result-card p{margin:10px 0 14px}
.brick-group.one{width:min(25vh,180px)}
.brick-group.hundred{width:min(38vh,300px)}
.brick-group.thousand{width:min(86vw,430px);grid-template-columns:repeat(5,minmax(0,1fr));gap:5px;margin-inline:auto}
.lesson-screen{padding-bottom:56px}
.answer-options{grid-template-columns:repeat(2,1fr)}
.answer-options button{font-size:11px;padding:10px 3px}
.quiz-screen .brick-group.one{width:min(25vh,180px)}
.quiz-screen .brick-group.hundred{width:min(32vh,260px)}
.quiz-screen .brick-group.thousand{width:min(30vh,235px)}
}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}
}