/* Tetris 1.13: stable category colors, collected-element map and viewport-fit controls. */
.view-game .method-fall .question-stage{padding:9px 8px 7px;background-image:none!important;background-color:#031c2b;overflow-y:auto;overscroll-behavior:contain}
.view-game .method-fall .game-question{font-size:21px;line-height:1.15;margin:0 0 5px;letter-spacing:-.4px;min-height:49px;display:flex;align-items:center;justify-content:center}
.view-game .method-fall .learning-tools{display:grid;grid-template-columns:minmax(0,1fr) 172px minmax(0,1fr);align-items:center;min-height:78px;margin-bottom:5px;gap:6px}.view-game .method-fall .learning-tools>span:first-child{max-width:none;overflow-wrap:anywhere}.view-game .method-fall .learning-tools>span:last-child{text-align:right;white-space:normal}
.view-game .method-fall .learning-tools>span{font-size:10px}
.view-game .method-fall .help-button{min-height:32px;padding:5px 10px}
.view-game .method-fall .fall-view{flex:1 1 0;min-height:0;display:flex;flex-direction:column}
.view-game .method-fall .fall-time{margin:0 2px 5px;font-size:10px;line-height:1.2;gap:8px}
.view-game .method-fall .fall-time>span:first-child{font-size:17px}
.view-game .method-fall .fall-arena{flex:1 1 0;min-height:0;max-height:none;border-radius:13px;background:radial-gradient(ellipse at 50% 0,rgba(20,95,126,.22),transparent 64%),#031724;isolation:isolate;touch-action:pan-y;overflow:hidden}
.view-game .method-fall .fall-tracks{position:absolute;inset:0;display:grid;pointer-events:none}
.view-game .method-fall .fall-tracks>span{border-right:1px dashed rgba(123,199,216,.19);background:linear-gradient(180deg,transparent,rgba(40,109,128,.04))}
.view-game .method-fall .fall-tracks>span:last-child{border-right:0}
.view-game .method-fall .fall-tracks>.selected{background:linear-gradient(180deg,rgba(71,215,239,.035),rgba(47,199,219,.17));box-shadow:inset 0 -2px 0 #75eafa}
.view-game .method-fall .fall-card{top:0;left:37.5%;width:calc(25% - 14px);max-width:79px;min-width:0;min-height:65px;height:76px;padding:7px 2px 5px;border-radius:11px;border:1.5px solid #a1edfc;z-index:2;transition:left .13s ease-out;box-shadow:0 0 16px rgba(80,224,244,.36),inset 0 0 15px rgba(133,220,244,.18);background:linear-gradient(145deg,#187da0,#10415d);will-change:transform}
.view-game .method-fall .fall-card>small{font-size:9px;left:6px;top:4px}
.view-game .method-fall .fall-card>strong{font-size:30px;line-height:1.05;margin-top:9px;font-weight:750}
.view-game .method-fall .fall-card>span{font-size:9px;line-height:1.1;margin-top:3px;overflow-wrap:anywhere}
.view-game .method-fall .fall-card:after{content:"";position:absolute;left:30%;right:30%;height:20px;bottom:calc(100% + 3px);background:linear-gradient(transparent,rgba(140,235,248,.3));clip-path:polygon(50% 0,100% 100%,0 100%);opacity:.7;pointer-events:none}
.view-game .method-fall .fall-targets{position:absolute;bottom:0;left:0;right:0;z-index:3;display:grid;gap:3px;padding:0 3px 3px;align-items:stretch;height:136px}
.view-game .method-fall .fall-target{position:relative;min-width:0;height:133px;padding:5px 3px 4px;border:1px solid rgba(var(--fall-rgb,99,171,190),.4);border-top:3px solid var(--fall-accent,#71a9b7);border-radius:8px 8px 10px 10px;background:linear-gradient(160deg,rgba(var(--fall-rgb,99,171,190),.24),rgba(var(--fall-rgb,99,171,190),.09));color:#f5faff;box-shadow:inset 0 1px 8px rgba(var(--fall-rgb,99,171,190),.08);display:flex;flex-direction:column;align-items:stretch;justify-content:flex-start;gap:4px;font-size:12px;font-weight:550;line-height:1.25;overflow-wrap:anywhere;hyphens:auto;text-align:center;touch-action:manipulation}
.view-game .method-fall .fall-category{display:flex;align-items:center;justify-content:center;flex:0 0 44px;min-height:44px;line-height:1.2}
.view-game .method-fall .fall-stack{display:grid;grid-template-columns:repeat(auto-fit,minmax(26px,1fr));grid-auto-rows:32px;align-content:start;gap:3px;flex:1;min-height:0;overflow:auto;overscroll-behavior:contain;scrollbar-width:thin}
.view-game .method-fall .fall-tile{display:flex;flex-direction:column;justify-content:center;align-items:center;min-width:0;max-width:36px;width:100%;justify-self:center;border:1px solid #9ddfbd;border-radius:5px;background:linear-gradient(145deg,#347260,#123e39);color:#f2fff7;box-shadow:inset 0 1px 3px #c0ffd52b}
.view-game .method-fall .fall-tile>small{font-size:9px;line-height:1.1;font-weight:500}
.view-game .method-fall .fall-tile>strong{font-size:16px;line-height:1.15;letter-spacing:-.4px}
.view-game .method-fall .fall-target.selected{border-color:#e9fbff;box-shadow:0 -4px 13px rgba(var(--fall-rgb,99,171,190),.20),inset 0 0 0 1px rgba(255,255,255,.3);color:#fff}
.view-game .method-fall .fall-target:disabled{opacity:1;cursor:default}
.view-game .method-fall .fall-selected,.view-game .method-fall .fall-controls button>small{position:absolute!important;width:1px!important;height:1px!important;min-height:0!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}
.view-game .method-fall .answer-section{margin-top:6px;padding:7px 7px 6px;flex:0 0 auto}
.view-game .method-fall .answer-section>p{display:none}
.view-game .method-fall .fall-controls{display:grid;grid-template-columns:1fr .9fr 1fr;gap:9px}
.view-game .method-fall .fall-controls button{min-height:56px;border:1px solid #cebdff;border-radius:13px;background:linear-gradient(155deg,#514278,#262741);color:#e7dbff;box-shadow:inset 0 0 11px #cfbaf522,0 2px 7px #0003;display:flex;align-items:center;justify-content:center;gap:9px;touch-action:manipulation}
.view-game .method-fall .fall-controls button>span{font-size:38px;line-height:1;font-weight:600}
.view-game .method-fall .fall-controls button>small{font-size:12px;line-height:1.1;font-weight:650}
.view-game .method-fall .fall-controls #fall-drop{background:linear-gradient(145deg,#79552b,#493523);border-color:#f0ce88;color:#ffe4a8}
.view-game .method-fall .fall-controls button:disabled{opacity:.4}
.view-game .method-fall .fall-controls button:active:not(:disabled){filter:brightness(1.25);transform:translateY(1px)}
.view-game .method-fall .fall-controls button:focus-visible,.view-game .method-fall .fall-target:focus-visible{outline:3px solid #fff;outline-offset:2px}
.view-game .method-fall .fall-impact{position:absolute;top:13px;left:10px;right:10px;z-index:4;border:1px solid #88dce6;background:rgba(3,25,36,.97);padding:12px 10px;border-radius:11px;color:#fff;font-size:15px;font-weight:650;line-height:1.35;box-shadow:0 4px 15px #0005;text-align:center}
.view-game .method-fall .fall-target.correct{border-color:#acffd0;color:#fff;box-shadow:inset 0 0 0 1px #acffd0,0 -3px 12px #60dd7d33}
.view-game .method-fall .fall-target.wrong{border-color:#ff9aaa;color:#fff;box-shadow:inset 0 0 0 1px #ff9aaa}
.view-game .method-fall .fall-target[data-feedback-mark]:after{content:attr(data-feedback-mark);position:absolute;right:3px;top:-16px;font-size:24px;line-height:1;color:#a0ffc5;text-shadow:0 2px 7px #021e25}
.view-game .method-fall .fall-target.wrong:after{color:#ff9eac}
.view-game .method-fall .fall-card.caught{border-color:#b6ffcb;background:linear-gradient(#267761,#125144);box-shadow:0 0 26px #8affb677;animation:fall-catch .45s ease-out}
.view-game .method-fall .fall-card.missed{border-color:#ffa6b3;background:linear-gradient(#994f69,#542e44);box-shadow:0 0 20px #ff87b155}
.view-game .method-fall .fall-dropping .fall-card:after{height:55px;opacity:1}
.view-game .method-fall .landed .fall-card:after{display:none}
@keyframes fall-catch{0%{filter:brightness(2)}100%{filter:brightness(1)}}
/* The whole miniature opens a readable, keyboard-accessible collected-element map. */
.view-game .method-fall .fall-map-toggle{display:block;width:172px;height:78px;min-height:44px;padding:3px;border:1px solid #456879;border-radius:7px;background:rgba(4,24,36,.76);color:#eafaff;touch-action:manipulation;box-shadow:inset 0 1px 8px #9adeeb0a}
.fall-map-grid{display:grid;grid-template-columns:repeat(18,minmax(0,1fr));grid-template-rows:repeat(9,minmax(0,1fr));gap:1px;width:100%;height:100%;min-width:0;min-height:0}
.fall-map-cell{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;min-width:0;min-height:0;overflow:hidden;border:1px solid rgba(132,174,190,.15);border-radius:1px;background:rgba(64,96,110,.13);color:#f6fcff;line-height:1;box-sizing:border-box}
.fall-map-cell.collected{background:rgba(var(--fall-rgb,99,171,190),.34);border-color:rgba(var(--fall-rgb,99,171,190),.68);box-shadow:inset 0 0 3px rgba(var(--fall-rgb,99,171,190),.1)}
.fall-map-cell>small{display:none}
.fall-map-cell>strong{font-size:5px;line-height:1;font-weight:750;letter-spacing:-.2px}
.fall-map-cell:not(.collected)>strong{visibility:hidden}
.view-game .method-fall .fall-map-toggle:active{border-color:#d3f8ff;background:rgba(17,54,70,.9)}
.view-game .method-fall .fall-map-toggle:focus-visible,.fall-map-sheet button:focus-visible,.fall-map-sheet select:focus-visible{outline:2px solid #fff;outline-offset:2px}
.fall-map-sheet{position:fixed;inset:0;z-index:140;display:flex;flex-direction:column;gap:14px;width:100%;height:var(--game-height,100vh);height:var(--game-height,100dvh);max-height:100%;padding:calc(12px + env(safe-area-inset-top)) max(12px,env(safe-area-inset-right)) calc(14px + env(safe-area-inset-bottom)) max(12px,env(safe-area-inset-left));overflow-y:auto;overscroll-behavior:contain;background:linear-gradient(155deg,#092a3c,#031624 75%);color:#f4faff;box-shadow:0 0 40px #0007}
.fall-map-sheet>header{display:flex;align-items:center;justify-content:space-between;gap:12px;flex:0 0 auto;width:100%;max-width:720px;margin:0 auto}
.fall-map-sheet h2{font:700 22px/1.15 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;letter-spacing:-.4px;color:#fff;margin:0}
.fall-map-sheet #fall-map-close,.fall-map-sheet header button{flex:0 0 44px;width:44px;height:44px;min-height:44px;padding:0;border:1px solid #7194a3;border-radius:12px;background:rgba(91,137,158,.17);color:#fff;font-size:26px;line-height:1;display:flex;justify-content:center;align-items:center}
.fall-map-sheet #fall-map-scale{flex:0 0 auto;width:100%;max-width:720px;min-height:44px;padding:10px 32px 10px 12px;border:1px solid #6a97a8;border-radius:10px;background:#0c3043;color:#f6fcff;font-size:16px;margin:0 auto}
.fall-map-sheet #fall-map-scale option{background:#0c3043;color:#fff}
.fall-map-large{flex:0 0 auto;width:100%;max-width:720px;min-height:155px;height:min(48vw,55vh);max-height:55vh;margin:0 auto;gap:2px;grid-template-rows:repeat(9,minmax(0,1fr))}
.fall-map-large .fall-map-cell{border-radius:3px;border-color:rgba(152,198,215,.25)}
.fall-map-large .fall-map-cell.collected{background:linear-gradient(150deg,rgba(var(--fall-rgb,99,171,190),.49),rgba(var(--fall-rgb,99,171,190),.25));border-color:rgba(var(--fall-rgb,99,171,190),.92)}
.fall-map-large .fall-map-cell>small{display:block;align-self:flex-start;padding-left:1px;margin-bottom:1px;color:#f2faff;font-size:6px;line-height:1}
.fall-map-large .fall-map-cell>strong{font-size:clamp(8px,2.2vw,18px);line-height:1.05;letter-spacing:-.4px}
.fall-map-large .fall-map-cell:not(.collected)>small{color:#608394}
.fall-map-sheet #fall-map-legend{display:flex;flex-wrap:wrap;align-content:flex-start;gap:8px 12px;width:100%;max-width:720px;margin:0 auto;padding-top:2px;font-size:12px;line-height:1.35;color:#e3f1f7}
.fall-map-sheet #fall-map-legend>span{display:inline-flex;align-items:center;gap:6px;min-height:24px}
.fall-map-sheet #fall-map-legend i{display:inline-block;flex:0 0 14px;width:14px;height:14px;border-radius:4px;background:rgba(var(--fall-rgb,99,171,190),.38);border:1px solid var(--fall-accent,#71a9b7)}
.fall-map-sheet #fall-map-summary{width:100%;max-width:720px;margin:0 auto;color:#bcd5e0;font-size:13px;line-height:1.35}
@media(min-width:700px){.fall-map-large .fall-map-cell>small{font-size:10px;padding-left:3px;margin-bottom:2px}.fall-map-sheet{gap:20px;padding-top:24px}}
@media(max-width:350px){.view-game .method-fall .fall-target{font-size:12px;padding-left:2px;padding-right:2px}.view-game .method-fall .fall-card>strong{font-size:25px}.view-game .method-fall .fall-card>span{font-size:8px}.view-game .method-fall .fall-controls button{gap:5px}.view-game .method-fall .fall-controls button>small{font-size:11px}}
@media(max-height:650px){
.view-game .method-fall .game-question{font-size:18px;min-height:43px;margin-bottom:4px}
.view-game .method-fall .learning-tools{grid-template-columns:minmax(0,1fr) 152px minmax(0,1fr);min-height:70px;margin-bottom:3px}
.view-game .method-fall .fall-map-toggle{width:152px;height:70px}.view-game .method-fall .fall-view,.view-game .method-fall .fall-arena{flex-basis:0;min-height:0}
.view-game .method-fall .fall-controls button{min-height:49px}
.view-game .method-fall .fall-targets{height:112px}
.view-game .method-fall .fall-target{height:109px;padding-top:3px;gap:3px;font-size:11px}
.view-game .method-fall .fall-category{flex-basis:40px;min-height:40px}
.view-game .method-fall .fall-stack{grid-auto-rows:30px;gap:2px}
.view-game .method-fall .fall-tile>strong{font-size:15px}
.view-game .method-fall .fall-card{height:68px;min-height:60px;padding-top:5px}
.view-game .method-fall .fall-card>strong{font-size:27px;margin-top:8px}
}
/* visualViewport can shrink independently of the layout viewport. */
.view-game.game-compact .method-fall .game-question{font-size:18px;min-height:43px;margin-bottom:4px}
.view-game.game-compact .method-fall .learning-tools{grid-template-columns:minmax(0,1fr) 152px minmax(0,1fr);min-height:70px;margin-bottom:3px}
.view-game.game-compact .method-fall .fall-map-toggle{width:152px;height:70px}.view-game.game-compact .method-fall .fall-view,.view-game.game-compact .method-fall .fall-arena{flex-basis:0;min-height:0}
.view-game.game-compact .method-fall .fall-controls button{min-height:49px}
.view-game.game-compact .method-fall .fall-targets{height:112px}
.view-game.game-compact .method-fall .fall-target{height:109px;padding-top:3px;gap:3px;font-size:11px}
.view-game.game-compact .method-fall .fall-category{flex-basis:40px;min-height:40px}
.view-game.game-compact .method-fall .fall-stack{grid-auto-rows:30px;gap:2px}
.view-game.game-compact .method-fall .fall-tile>strong{font-size:15px}
.view-game.game-compact .method-fall .fall-card{height:68px;min-height:60px;padding-top:5px}
.view-game.game-compact .method-fall .fall-card>strong{font-size:27px;margin-top:8px}
@media(prefers-reduced-motion:reduce){.view-game .method-fall .fall-card{transition:none;animation:none!important;will-change:auto}.view-game .method-fall .fall-card:after{display:none}.view-game .method-fall .fall-controls button:active{transform:none}}
.fall-map-sheet #fall-map-legend>.fall-map-gradient{display:block;flex:1 0 100%;height:12px;min-height:12px;border-radius:6px;border:1px solid #bad5df77}.fall-map-sheet #fall-map-source{width:100%;max-width:720px;margin:0 auto;color:#bcd5e0;font-size:11px;line-height:1.4;text-decoration:underline;min-height:44px;padding:10px 0}
@media(max-height:540px){.view-game.game-compact .method-fall .game-question{font-size:17px;min-height:34px;margin-bottom:3px}.view-game.game-compact .method-fall .learning-tools{grid-template-columns:minmax(0,1fr) 130px minmax(0,1fr);min-height:54px}.view-game.game-compact .method-fall .fall-map-toggle{width:130px;height:54px}.view-game.game-compact .method-fall .fall-controls button{min-height:44px}.view-game.game-compact .method-fall .fall-targets{height:104px}.view-game.game-compact .method-fall .fall-target{height:101px}.view-game.game-compact .method-fall .fall-category{min-height:36px;flex-basis:36px}.view-game.game-compact .method-fall .fall-card{height:60px;min-height:60px}.view-game.game-compact .method-fall .fall-card>strong{font-size:25px}.view-game.game-compact .method-fall .fall-time>span:first-child{font-size:15px}}
/* 1.13.1: a wider collection, less header space, direct finger placement. */
.view-game .game-area.method-fall .question-stage{padding-top:6px}
.view-game .game-area.method-fall .game-question{display:block;flex:0 0 auto;min-height:0;font-size:18px;line-height:1.12;letter-spacing:-.25px;margin:0 0 4px}
.view-game .game-area.method-fall .learning-tools{display:block;position:relative;flex:0 0 88px;height:88px;min-height:0;margin:0 0 3px}
.view-game .game-area.method-fall .learning-tools #learning-reward{display:none}
.view-game .game-area.method-fall .learning-tools #learning-domain{position:absolute;z-index:1;left:17%;right:35%;top:7px;max-width:none;margin:0;color:#c8e2ed;font-size:9px;font-weight:550;line-height:1.15;text-align:center;letter-spacing:0;pointer-events:none;overflow-wrap:normal}
.view-game .game-area.method-fall .fall-map-toggle{width:100%;max-width:none;height:88px;min-height:0;padding:1px 2px;border-radius:6px;background:rgba(4,24,36,.45)}
.view-game .game-area.method-fall .fall-map-toggle .fall-map-cell{border-width:.5px}
.view-game .game-area.method-fall .fall-map-toggle .fall-map-cell>strong{font-size:7px;line-height:1;letter-spacing:-.1px}
.view-game .game-area.method-fall .fall-time{display:grid;grid-template-columns:1fr auto auto;align-items:center;gap:12px;margin:0 2px 4px;min-height:20px}
.view-game .game-area.method-fall #fall-reward{font-size:10px;font-weight:400;color:#c5dce6;white-space:nowrap}
.view-game .game-area.method-fall .fall-card{touch-action:none;user-select:none;-webkit-user-select:none;-webkit-touch-callout:none;cursor:grab}
.view-game .game-area.method-fall .fall-card.fall-dragging{z-index:6;pointer-events:none;transition:none;cursor:grabbing;border-color:#fff;box-shadow:0 0 20px #9feaff66,0 6px 16px #0005}
.view-game .game-area.method-fall .fall-card.fall-dragging:after{display:none}
.view-game .game-area.method-fall .fall-target.fall-drag-over{outline:2px solid #f2fbff;outline-offset:-5px;box-shadow:inset 0 0 16px rgba(var(--fall-rgb,99,171,190),.34)}
.view-game.game-compact .game-area.method-fall .learning-tools{height:80px;flex-basis:80px}
.view-game.game-compact .game-area.method-fall .fall-map-toggle{height:80px}
.view-game.game-compact .game-area.method-fall .fall-map-toggle .fall-map-cell>strong{font-size:6px}
@media(max-height:540px){.view-game.game-compact .game-area.method-fall .game-question{font-size:17px;margin-bottom:3px}.view-game.game-compact .game-area.method-fall .learning-tools{height:72px;flex-basis:72px}.view-game.game-compact .game-area.method-fall .fall-map-toggle{height:72px}.view-game.game-compact .game-area.method-fall .fall-map-toggle .fall-map-cell>strong{font-size:5.5px}.view-game.game-compact .game-area.method-fall .learning-tools #learning-domain{font-size:8px;top:5px}}

/* 1.13.2: answer feedback focuses one element without changing the collection. */
.view-game .method-fall .fall-impact.feedback-right{background:rgba(25,83,61,.97);border-color:#8ee3b4;color:#fff}
.view-game .method-fall .fall-impact.feedback-wrong{background:rgba(108,39,58,.97);border-color:#ff9ead;color:#fff}
.fall-map-cell.feedback-focus{background:rgba(var(--fall-rgb),.5);border-color:var(--fall-accent);box-shadow:0 0 5px rgba(var(--fall-rgb),.5)}
.fall-map-cell.feedback-focus>strong{visibility:visible}