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.mobile-action-bar__btn-label{font-size:12px}.mobile-action-bar__pin-indicator{width:32px;height:32px;display:flex;align-items:center;justify-content:center;background:rgba(var(--game-border-rgb),.2);border:1px solid rgba(var(--game-border-rgb),.4);border-radius:8px;cursor:pointer;transition:background .15s ease,border-color .15s ease,transform .1s ease}.mobile-action-bar__pin-indicator:active{transform:scale(.9)}.mobile-action-bar__pin-indicator svg{width:16px;height:16px;stroke:var(--game-text-secondary)}.mobile-action-bar__pin-indicator--active{background:#4ade8033;border-color:#4ade8080}.mobile-action-bar__pin-indicator--active svg{stroke:#4ade80}@supports (padding-bottom: env(safe-area-inset-bottom)){.mobile-action-bar__menu{bottom:calc(160px + env(safe-area-inset-bottom))}}@media (orientation: landscape) and (max-height: 500px){.mobile-action-bar__menu{bottom:120px;max-height:60vh;overflow-y:auto}.mobile-action-bar__menu-btn{min-height:38px}}:root{--tetris-bg-dark: var(--game-bg-dark);--tetris-bg-medium: #16213e;--tetris-bg-light: #0f3460;--tetris-accent: #e94560;--tetris-accent-glow: rgba(233, 69, 96, .5);--tetris-text: #ffffff;--tetris-text-muted: rgba(255, 255, 255, .6);--tetris-success: #4ecdc4;--tetris-error: #ff6b6b;--tetris-gold: var(--game-accent-gold);--tetris-border-radius: 12px;--tetris-shadow: 0 4px 20px rgba(0, 0, 0, .3)}.tetris-modal{position:fixed;top:0;right:0;bottom:0;left:0;z-index:10000;display:none;align-items:center;justify-content:center;font-family:DM Sans,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}.tetris-modal.active{display:flex}.tetris-modal.preparing{display:flex;opacity:0;pointer-events:none}.tetris-modal.active.visible{opacity:1;pointer-events:auto;transition:opacity .15s ease-out}.tetris-modal__backdrop{position:absolute;top:0;right:0;bottom:0;left:0;background:#000000d9;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.tetris-modal__layout{position:relative;display:flex;gap:16px;max-width:1200px;max-height:90vh;width:100%;padding:16px;z-index:1}.tetris-game-panel,.tetris-leaderboard-panel{display:none;flex-direction:column;background:var(--tetris-bg-medium);border-radius:var(--tetris-border-radius);padding:16px;min-width:280px;max-height:80vh;overflow-y:auto}.tetris-game-panel.visible,.tetris-leaderboard-panel.visible{display:flex}.tetris-leaderboard-panel h4{margin:0 0 16px;color:var(--tetris-gold);font-size:18px}.tetris-modal__content{flex:1;display:flex;flex-direction:column;background:var(--tetris-bg-dark);border-radius:var(--tetris-border-radius);box-shadow:var(--tetris-shadow);max-height:80vh;overflow:hidden}.tetris-modal__header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid rgba(255,255,255,.1);background:var(--tetris-bg-medium)}.tetris-modal__header h3{margin:0;font-size:24px;color:var(--tetris-text)}.tetris-modal__close{background:none;border:none;color:var(--tetris-text-muted);cursor:pointer;padding:8px;border-radius:8px;transition:all .2s}.tetris-modal__close:hover{background:#ffffff1a;color:var(--tetris-text)}.tetris-modal__close svg{width:24px;height:24px}.tetris-modal__body{flex:1;min-height:0;padding:20px;overflow-y:auto;color:var(--tetris-text);-webkit-overflow-scrolling:touch}.tetris-lobby{display:flex;flex-direction:column;align-items:center;gap:20px;padding:20px}.tetris-lobby-subtitle{font-size:16px;color:var(--tetris-text-muted);text-align:center;margin:0}.tetris-loading{display:flex;flex-direction:column;align-items:center;gap:12px;padding:40px}.tetris-spinner{width:40px;height:40px;border:3px solid var(--tetris-bg-light);border-top-color:var(--tetris-accent);border-radius:50%;animation:tetris-spin 1s linear infinite}@keyframes tetris-spin{to{transform:rotate(360deg)}}.tetris-flashcard-sets{display:flex;flex-direction:column;gap:8px;width:100%;max-width:400px;max-height:250px;overflow-y:auto}.tetris-flashcard-set{background:var(--tetris-bg-medium);border:2px solid transparent;border-radius:var(--tetris-border-radius);padding:12px 16px;cursor:pointer;transition:all .2s ease}.tetris-flashcard-set:hover{background:var(--tetris-bg-light);border-color:var(--tetris-accent)}.tetris-flashcard-set.selected{border-color:var(--tetris-success);background:#4ecdc41a}.tetris-flashcard-set-name{font-weight:600;display:flex;align-items:center;gap:8px}.tetris-flashcard-set-count{font-size:13px;color:var(--tetris-text-muted);margin-top:4px}.tetris-assigned-badge{background:var(--tetris-accent);color:#fff;font-size:11px;padding:2px 8px;border-radius:10px;font-weight:500}.tetris-players-waiting{width:100%;max-width:400px}.tetris-players-waiting h4{margin:0 0 12px;color:var(--tetris-text-muted);font-size:14px;text-transform:uppercase;letter-spacing:.5px}.tetris-players-list{display:flex;flex-wrap:wrap;gap:8px}.tetris-player-chip{background:var(--tetris-bg-light);padding:8px 12px;border-radius:20px;font-size:14px}.tetris-player-chip.ready{background:#4ecdc433;color:var(--tetris-success)}.tetris-join-btn{background:var(--tetris-accent);color:#fff;border:none;padding:14px 32px;border-radius:var(--tetris-border-radius);font-size:16px;font-weight:600;cursor:pointer;transition:all .2s;min-width:250px}.tetris-join-btn:hover:not(:disabled){background:#d63e55;transform:translateY(-2px)}.tetris-join-btn:disabled{opacity:.5;cursor:not-allowed}.tetris-category{border:2px solid rgba(236,72,153,.2);border-radius:12px;margin-bottom:8px;overflow:hidden;background:#ec48991a}.tetris-category--has-assigned{border-color:#ec489980;background:#ec489926}.tetris-category__header{display:flex;align-items:center;gap:8px;width:100%;padding:14px 16px;background:transparent;border:none;cursor:pointer;color:#fff;font-size:15px;font-weight:600;text-align:left;transition:background .2s}.tetris-category__header:hover{background:#ec489933}.tetris-category__chevron{display:flex;align-items:center;justify-content:center;color:#ffffffb3;transition:transform .2s}.tetris-category--expanded .tetris-category__chevron{transform:rotate(90deg)}.tetris-category__name{flex:1;color:#fff}.tetris-category__count{font-size:12px;font-weight:500;color:#ffffff80}.tetris-category--has-assigned .tetris-category__count{color:#ec4899}.tetris-category__content{display:none;padding:0 12px 12px}.tetris-category--expanded .tetris-category__content{display:block}.tetris-set-item{display:flex;align-items:center;justify-content:space-between;width:100%;padding:12px 14px;margin:6px 0;background:#ffffff0d;border:2px solid transparent;border-radius:10px;cursor:pointer;color:#fff;text-align:left;transition:all .2s}.tetris-set-item:hover{background:#ec489933;border-color:#ec489966;transform:translate(4px)}.tetris-set-item--selected{background:#ec48994d;border-color:#ec4899}.tetris-set-item--assigned{border-left:4px solid #ec4899}.tetris-set-item__info{display:flex;flex-direction:column;gap:2px}.tetris-set-item__name{font-size:14px;font-weight:600;color:#fff}.tetris-set-item__count{font-size:12px;color:#ffffff80}.tetris-set-item__badge{font-size:10px;font-weight:600;text-transform:uppercase;padding:3px 8px;border-radius:6px;background:linear-gradient(135deg,#ec4899,#db2777);color:#fff}.tetris-set-selection__empty{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:40px;color:#ffffff80;text-align:center}.tetris-set-selection__empty svg{margin-bottom:16px;opacity:.5}.tetris-set-list--nested{flex:1;min-height:0;max-height:none!important;overflow-y:auto;padding:4px}.tetris-game-area{display:flex;flex-direction:column;gap:12px}.tetris-stats-bar{display:flex;justify-content:space-around;background:var(--tetris-bg-dark);border-radius:8px;padding:12px}.tetris-stat{text-align:center}.tetris-stat-value{font-size:24px;font-weight:700;color:var(--tetris-gold)}.tetris-stat-label{font-size:12px;color:var(--tetris-text-muted);text-transform:uppercase}.tetris-timer{font-size:20px;font-weight:700;color:var(--tetris-text);padding:8px 16px;background:var(--tetris-bg-light);border-radius:8px}.tetris-timer.warning{color:var(--tetris-error);animation:tetris-pulse .5s ease-in-out infinite}@keyframes tetris-pulse{0%,to{opacity:1}50%{opacity:.5}}.tetris-board-container{display:flex;justify-content:center}.tetris-board{display:grid;grid-template-columns:repeat(10,22px);grid-template-rows:repeat(20,22px);gap:1px;background:var(--tetris-bg-dark);border:2px solid var(--tetris-bg-light);border-radius:4px;padding:4px}.tetris-cell{width:22px;height:22px;background:#ffffff0d;border-radius:2px;transition:background-color .1s}.tetris-cell.ghost{background:#ffffff26}.tetris-cell.I{background:#00f0f0;box-shadow:inset 0 0 8px #00f0f080}.tetris-cell.O{background:#f0f000;box-shadow:inset 0 0 8px #f0f00080}.tetris-cell.T{background:#a000f0;box-shadow:inset 0 0 8px #a000f080}.tetris-cell.S{background:#00f000;box-shadow:inset 0 0 8px #00f00080}.tetris-cell.Z{background:#f00000;box-shadow:inset 0 0 8px #f0000080}.tetris-cell.J{background:#0000f0;box-shadow:inset 0 0 8px #0000f080}.tetris-cell.L{background:#f0a000;box-shadow:inset 0 0 8px #f0a00080}.tetris-cell.JUNK_1,.tetris-cell.JUNK_2,.tetris-cell.JUNK_3{background:#505050;box-shadow:inset 0 0 8px #50505080}.tetris-cell.tetris-lock-flash{animation:tetris-lock-pulse .3s ease-out}@keyframes tetris-lock-pulse{0%{transform:scale(1);filter:brightness(1)}50%{transform:scale(1.15);filter:brightness(1.5);box-shadow:0 0 12px currentColor}to{transform:scale(1);filter:brightness(1)}}.tetris-next-piece{text-align:center}.tetris-next-piece h4{margin:0 0 8px;font-size:14px;color:var(--tetris-text-muted)}.tetris-piece-preview{display:grid;grid-template-columns:repeat(4,20px);grid-template-rows:repeat(4,20px);gap:1px;justify-content:center;background:var(--tetris-bg-dark);padding:8px;border-radius:8px}.tetris-preview-cell{width:20px;height:20px;background:transparent;border-radius:2px}.tetris-preview-cell.I{background:#00f0f0}.tetris-preview-cell.O{background:#f0f000}.tetris-preview-cell.T{background:#a000f0}.tetris-preview-cell.S{background:#00f000}.tetris-preview-cell.Z{background:#f00000}.tetris-preview-cell.J{background:#0000f0}.tetris-preview-cell.L{background:#f0a000}.tetris-preview-cell.JUNK_1,.tetris-preview-cell.JUNK_2,.tetris-preview-cell.JUNK_3{background:#505050}.tetris-preview-hint{grid-column:span 4;font-size:12px;color:var(--tetris-text-muted);text-align:center;padding:10px}.tetris-mobile-controls{display:none;justify-content:center;gap:8px;margin-top:12px}@media (max-width: 768px){.tetris-mobile-controls{display:flex}}.tetris-mobile-btn{width:50px;height:50px;font-size:24px;background:var(--tetris-bg-light);border:none;border-radius:8px;color:var(--tetris-text);cursor:pointer;transition:all .1s}.tetris-mobile-btn:active{background:var(--tetris-accent);transform:scale(.95)}.tetris-question-panel{display:flex;flex-direction:column;gap:20px}.tetris-question-header{display:flex;justify-content:space-between;align-items:center}.tetris-question-number{font-size:14px;color:var(--tetris-text-muted);text-transform:uppercase;letter-spacing:.5px}.tetris-streak{font-size:18px;padding:4px 12px;background:var(--tetris-bg-medium);border-radius:20px;transition:all .3s}.tetris-streak.active{background:linear-gradient(135deg,#ff6b6b,orange);animation:tetris-glow 1s ease-in-out infinite}@keyframes tetris-glow{0%,to{box-shadow:0 0 10px #ffa5004d}50%{box-shadow:0 0 20px #ffa50099}}.tetris-term{font-size:28px;font-weight:700;text-align:center;padding:30px 20px;background:var(--tetris-bg-medium);border-radius:var(--tetris-border-radius);min-height:100px;display:flex;align-items:center;justify-content:center}.tetris-choices{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.tetris-choice{padding:16px;background:var(--tetris-bg-medium);border:2px solid transparent;border-radius:var(--tetris-border-radius);cursor:pointer;text-align:center;font-size:16px;transition:all .2s}.tetris-choice:hover:not(.disabled){background:var(--tetris-bg-light);border-color:var(--tetris-accent);transform:translateY(-2px)}.tetris-choice.disabled{cursor:not-allowed;opacity:.7}.tetris-choice.correct{background:#4ecdc433;border-color:var(--tetris-success)}.tetris-choice.wrong{background:#ff6b6b33;border-color:var(--tetris-error)}.tetris-leaderboard-list{display:flex;flex-direction:column;gap:8px}.tetris-leaderboard-empty{color:var(--tetris-text-muted);text-align:center;padding:20px}.tetris-leaderboard-item{display:flex;align-items:center;gap:12px;padding:10px 12px;background:var(--tetris-bg-dark);border-radius:8px;transition:all .2s}.tetris-leaderboard-item.self{background:#e9456026;border:1px solid var(--tetris-accent)}.tetris-leaderboard-item.eliminated{opacity:.5}.tetris-rank{font-size:14px;font-weight:700;color:var(--tetris-text-muted);min-width:30px}.tetris-rank.gold{color:var(--game-accent-gold)}.tetris-rank.silver{color:silver}.tetris-rank.bronze{color:#cd7f32}.tetris-player-info{flex:1}.tetris-player-name{font-weight:600;font-size:14px}.tetris-player-stats{font-size:12px;color:var(--tetris-text-muted)}.tetris-player-score{font-size:18px;font-weight:700;color:var(--tetris-gold)}.tetris-result-overlay{position:absolute;top:0;right:0;bottom:0;left:0;background:#000000e6;display:flex;align-items:center;justify-content:center;z-index:100;animation:tetris-fadeIn .3s ease}@keyframes tetris-fadeIn{0%{opacity:0}to{opacity:1}}.tetris-result-content{text-align:center;padding:40px;color:var(--tetris-text)}.tetris-result-icon{font-size:72px;margin-bottom:20px}.tetris-result-title{font-size:36px;margin:0 0 12px}.tetris-result-subtitle{font-size:18px;color:var(--tetris-text-muted);margin-bottom:30px}.tetris-final-stats{display:flex;justify-content:center;gap:30px;margin-bottom:30px}.tetris-final-stat{text-align:center}.tetris-final-stat-value{font-size:32px;font-weight:700;color:var(--tetris-gold)}.tetris-final-stat-label{font-size:14px;color:var(--tetris-text-muted);text-transform:uppercase}.tetris-play-again-btn,.tetris-close-btn{padding:14px 32px;border-radius:var(--tetris-border-radius);font-size:16px;font-weight:600;cursor:pointer;transition:all .2s;margin:8px}.tetris-play-again-btn{background:var(--tetris-accent);color:#fff;border:none}.tetris-play-again-btn:hover{background:#d63e55}.tetris-close-btn{background:transparent;color:var(--tetris-text-muted);border:2px solid var(--tetris-text-muted)}.tetris-close-btn:hover{color:var(--tetris-text);border-color:var(--tetris-text)}.tetris-block-reward{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);font-size:64px;z-index:10001;animation:tetris-blockPop .6s ease-out forwards;pointer-events:none}@keyframes tetris-blockPop{0%{transform:translate(-50%,-50%) scale(.5);opacity:1}50%{transform:translate(-50%,-50%) scale(1.2);opacity:1}to{transform:translate(-50%,-100%) scale(1);opacity:0}}@media (max-width: 1024px){.tetris-modal__layout{flex-direction:column;max-height:95vh}.tetris-game-panel,.tetris-leaderboard-panel{min-width:unset;max-height:none}.tetris-game-panel.visible{order:1}.tetris-modal__content{order:2}.tetris-leaderboard-panel.visible{order:3;max-height:200px}}@media (max-width: 600px){.tetris-choices{grid-template-columns:1fr}.tetris-term{font-size:22px;padding:20px}.tetris-board{grid-template-columns:repeat(10,18px);grid-template-rows:repeat(20,18px)}.tetris-cell{width:18px;height:18px}.tetris-controls-hint{display:none}}.tetris-mode-toggle{width:100%;max-width:400px;margin-bottom:8px}.tetris-zen-toggle{display:flex;flex-direction:column;background:var(--tetris-bg-medium);border:2px solid var(--tetris-bg-light);border-radius:var(--tetris-border-radius);padding:12px 16px;cursor:pointer;transition:all .2s ease}.tetris-zen-toggle:hover{border-color:var(--tetris-accent)}.tetris-zen-toggle input[type=checkbox]{position:absolute;opacity:0;pointer-events:none}.tetris-zen-toggle:has(input:checked){border-color:var(--tetris-success);background:#4ecdc41a}.tetris-zen-toggle-label{font-weight:600;font-size:16px;color:var(--tetris-text)}.tetris-zen-toggle-desc{font-size:13px;color:var(--tetris-text-muted);margin-top:4px}.tetris-controls-hint{background:var(--tetris-bg-medium);border:1px solid rgba(255,255,255,.1);border-radius:var(--tetris-border-radius);padding:12px 16px;margin-top:16px;font-size:13px}.tetris-controls-title{font-weight:600;color:var(--tetris-accent);margin-bottom:10px;font-size:14px}.tetris-controls-row{display:flex;align-items:center;gap:8px;margin-bottom:6px;color:var(--tetris-text-muted)}.tetris-controls-row:last-child{margin-bottom:0}.tetris-key{display:inline-flex;align-items:center;justify-content:center;min-width:28px;height:24px;padding:0 6px;background:var(--tetris-bg-light);border:1px solid rgba(255,255,255,.2);border-radius:4px;font-family:monospace;font-size:12px;color:var(--tetris-text)}.tetris-zen-badge{display:inline-flex;align-items:center;gap:6px;background:linear-gradient(135deg,#4ecdc4,#45b7aa);color:#fff;padding:6px 12px;border-radius:20px;font-size:13px;font-weight:600;margin-bottom:12px}.tetris-integrated-layout{display:grid;grid-template-columns:auto 1fr;gap:24px;width:100%;height:100%;min-height:450px}.tetris-game-section{display:flex;flex-direction:column;gap:12px;min-width:240px}.tetris-stats-row{display:flex;align-items:center;gap:16px;padding:8px 12px;background:var(--tetris-bg-medium);border-radius:8px}.tetris-stat-compact{display:flex;align-items:center;gap:6px}.tetris-stat-compact .tetris-stat-icon{font-size:14px}.tetris-stat-compact .tetris-stat-value{font-weight:700;font-size:16px;color:var(--tetris-text)}.tetris-zen-badge-inline{margin-left:auto;background:linear-gradient(135deg,#4ecdc4,#45b7aa);color:#fff;padding:4px 10px;border-radius:12px;font-size:12px;font-weight:600}.tetris-timer-compact{margin-left:auto;font-weight:600;font-size:14px;color:var(--tetris-gold)}.tetris-board-wrapper{display:flex;gap:12px;align-items:flex-start}.tetris-next-piece-inline{display:flex;flex-direction:column;gap:4px;background:var(--tetris-bg-medium);padding:8px;border-radius:8px}.tetris-next-label{font-size:10px;font-weight:700;color:var(--tetris-text-muted);text-transform:uppercase;letter-spacing:1px}.tetris-next-piece-inline .tetris-piece-preview{width:80px;height:80px;display:grid;grid-template-columns:repeat(4,1fr);grid-template-rows:repeat(4,1fr);gap:1px}.tetris-question-section{display:flex;flex-direction:column;gap:16px;flex:1;min-width:280px}.tetris-question-header-row{display:flex;justify-content:space-between;align-items:center}.tetris-question-header-row 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