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:is(.category-card,.level-card,.picker-card):hover{border-color:var(--lavender);transform:translateY(-3px);box-shadow:0 7px #e7dcec,0 16px 28px #65487512}}.app :is(.category-card,.level-card,.picker-card):active{transform:translateY(2px)}@media (width<=480px){.app .app-content{padding:14px 12px 28px}.app .auth-screen{padding:20px 12px}}@media (height<=600px){.app .app-content{padding-top:6px}.app .game-board{padding-top:0}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}.app .digit-pad-wrapper{gap:18px;max-width:360px}.app .digit-pad{gap:12px;max-width:300px}.app .digit-btn{aspect-ratio:1.4;background:linear-gradient(160deg, #9573c2, var(--primary));min-height:54px;box-shadow:0 5px 0 var(--primary-deep), inset 0 2px 0 #ffffff35;border:1px solid #ffffff70;border-radius:21px;font-size:clamp(28px,7vw,32px)}.app 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.letter-btn-delete{background:var(--lilac)}.app :is(.spell-tile,.spell-full){border-radius:18px}.app .spell-tray{background:#e8f3ed;border:1px solid #d6e8dd;border-radius:24px}.app .spell-tile{color:var(--ink);background:#fffdf8;border-color:#d2e4d9;box-shadow:0 4px #bcd5c7}.app .spell-full{color:var(--primary-deep);border-color:var(--lavender)}.app .spell-wrong .spell-full{color:var(--danger);background:#fff0f1;border-color:#d68b99}.app .fraction-pad{gap:16px}.app .history-back-btn{background:var(--surface);min-width:44px;min-height:44px;box-shadow:0 3px 0 var(--line);border-radius:16px}@media (hover:hover){.app :is(.option-item,.listen-option):hover:not(:disabled){border-color:var(--lavender)}}@media (height<=650px){.app .digit-pad{gap:9px;max-width:250px}.app .digit-btn{aspect-ratio:1.5;border-radius:17px;min-height:46px;font-size:26px}.app .digit-display{height:52px}.app .digit-pad-wrapper{gap:12px}}.app .signin{max-width:410px;box-shadow:var(--shadow-soft), 0 7px 0 #e7ddec;background:#fffdfbea;border:2px solid #fff;border-radius:36px;gap:16px;padding:28px clamp(18px,5vw,36px)}.app .signin .welcome-bird{margin-top:-10px}.app .signin .logo-word,.app .signin .logo-bang{font-size:42px}.app .signin .logo-no{color:var(--muted);font-size:20px}.app .logo-word-math{background-image:linear-gradient(135deg, var(--primary-deep), var(--primary))}.app .logo-word-screen{background-image:linear-gradient(135deg, var(--success-deep), var(--success))}.app .logo-bang{color:#c58635}.app .logo-tagline{max-width:260px;font-size:13px;line-height:1.5}.app .signin-google{border:1px solid var(--line);box-shadow:0 3px 0 var(--line)}.app .signin-submit{background:linear-gradient(150deg, #8460b5, var(--primary));border-radius:18px}.app .signin-links{gap:0}.app .signin-link{min-height:44px}.app .signin-or{color:var(--muted)}.app .signin-input{background:#fffcf9;min-height:50px}.app .profile-picker{gap:24px;max-width:720px}.app .picker-grid{gap:18px;width:100%}.app 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.fives-options button.fives-right{border-color:#9ad9bb;box-shadow:0 4px #c4e9d6}.app .fives-options button.fives-retry{border-color:#d68b99;box-shadow:0 4px #f3c9d1}.app .visual-math{--vm-ink:var(--ink);background:var(--surface);box-shadow:var(--shadow);border-color:#fff}.app .chess-board-frame{box-shadow:0 6px 0 #d4bfdf, var(--shadow-soft);background:#faf3fd;border-color:#dfcee7}.app .chess-light{background:#fff6e9}.app .chess-dark{background:#b9d7c8}.app .chess-square.chess-source{background:#d8bce9}.app .chess-square.chess-clue-square{background:#fff0a4}.app .chess-square.chess-right{background:#9ddbb2}.app .chess-square.chess-wrong{background:#f4a6b3}.app .chess-square.chess-checked{background:#ffe09d}.app .ninja-arena{background:var(--paper) url(/art/meadow.webp) center bottom / cover}.app .ninja-dialog{background:var(--surface);box-shadow:var(--shadow), 0 18px 60px #65487526;border-radius:32px}.app .ninja-controls button{min-width:44px;min-height:44px}.app .ninja-primary{background:linear-gradient(145deg, #9878c4, var(--primary))}.app .feedback-icon{background:#fffdfbf2;border:3px solid #f5c6cb;border-radius:50%;place-items:center;width:112px;height:112px;font-size:72px;display:grid;box-shadow:0 8px 30px #65487526}.app .exams{max-width:560px;padding:8px 8px 24px}.app .practice-prompt{color:var(--ink)}.app .practice-figure{border:1px solid var(--line);border-radius:16px}.app .practice-finished{background:#fffdfbe6;border-radius:30px}.app .reasoning-round{background:var(--surface);color:var(--ink);box-shadow:var(--shadow)}.app .reasoning-scale{background:linear-gradient(145deg,#f4ebfb,#e7dcf2);box-shadow:0 4px #d5c4e3}.app .reasoning-options button{background:var(--surface);color:var(--ink);border-color:var(--line);box-shadow:0 4px 0 var(--line)}.app .reasoning-options button.reasoning-right{background:#def3e6;border-color:#7cbfa0;box-shadow:0 4px #a5d3ba}.app .reasoning-options 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