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#27ae604d}45%{background:linear-gradient(#a8e6cf 0%,#2ecc71 72%,#27ae60 100%);transform:scale(1.06);box-shadow:0 0 40px 15px #27ae6099}60%{background:linear-gradient(#6fcf97 0%,#27ae60 72%,#1e8449 100%);transform:scale(.98);box-shadow:0 0 15px 3px #27ae6033}80%{background:linear-gradient(#a8e6cf 0%,#2ecc71 72%,#27ae60 100%);transform:scale(1.04);box-shadow:0 0 30px 10px #27ae6080}to{background:linear-gradient(#6fcf97 0%,#27ae60 72%,#1e8449 100%);transform:scale(1.02);box-shadow:0 0 20px #27ae6066}}@keyframes flashColorRed{0%{background:linear-gradient(#f1948a 0%,#e74c3c 72%,#c0392b 100%);transform:scale(1)}15%{background:linear-gradient(#f5b7b1 0%,#ec7063 72%,#e74c3c 100%);transform:scale(1.08);box-shadow:0 0 50px 20px #e74c3cb3}30%{background:linear-gradient(#f1948a 0%,#e74c3c 72%,#c0392b 100%);transform:scale(.97);box-shadow:0 0 20px 5px #e74c3c4d}45%{background:linear-gradient(#f5b7b1 0%,#ec7063 72%,#e74c3c 100%);transform:scale(1.06);box-shadow:0 0 40px 15px 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#f1c40f33}80%{background:linear-gradient(#fdebd0 0%,#f7dc6f 72%,#f1c40f 100%);transform:scale(1.04);box-shadow:0 0 30px 10px #f1c40f80}to{background:linear-gradient(#f9e79f 0%,#f1c40f 72%,#d4ac0d 100%);transform:scale(1.02);box-shadow:0 0 20px #f1c40f66}}@keyframes flashColorGreenShow{0%{background:linear-gradient(#6fcf97 0%,#27ae60 72%,#1e8449 100%);transform:scale(1)}10%{background:linear-gradient(#d5f5e3 0%,#82e0aa 72%,#27ae60 100%);transform:scale(1.12);box-shadow:0 0 60px 25px #27ae60e6}25%{background:linear-gradient(#6fcf97 0%,#27ae60 72%,#1e8449 100%);transform:scale(.95);box-shadow:0 0 20px 5px #27ae604d}40%{background:linear-gradient(#d5f5e3 0%,#82e0aa 72%,#27ae60 100%);transform:scale(1.1);box-shadow:0 0 50px 20px #27ae60b3}60%{background:linear-gradient(#6fcf97 0%,#27ae60 72%,#1e8449 100%);transform:scale(.97);box-shadow:0 0 15px 3px #27ae6033}80%{background:linear-gradient(#d5f5e3 0%,#82e0aa 72%,#27ae60 100%);transform:scale(1.06);box-shadow:0 0 35px 12px #27ae6080}to{background:linear-gradient(#6fcf97 0%,#27ae60 72%,#1e8449 100%);transform:scale(1.02);box-shadow:0 0 20px #27ae6066}}@keyframes flashColorGreenBlack{0%{background:linear-gradient(90deg,#27ae60 0%,#2ecc71 45%,#27ae60 100%);transform:translate(-50%)scale(1)}15%{background:linear-gradient(90deg,#82e0aa 0%,#58d68d 45%,#2ecc71 100%);transform:translate(-50%)scale(1.1);box-shadow:0 0 50px 20px #27ae60b3}30%{background:linear-gradient(90deg,#27ae60 0%,#2ecc71 45%,#27ae60 100%);transform:translate(-50%)scale(.95);box-shadow:0 0 20px 5px #27ae604d}45%{background:linear-gradient(90deg,#82e0aa 0%,#58d68d 45%,#2ecc71 100%);transform:translate(-50%)scale(1.08);box-shadow:0 0 40px 15px #27ae6099}60%{background:linear-gradient(90deg,#27ae60 0%,#2ecc71 45%,#27ae60 100%);transform:translate(-50%)scale(.97);box-shadow:0 0 15px 3px #27ae6033}80%{background:linear-gradient(90deg,#82e0aa 0%,#58d68d 45%,#2ecc71 100%);transform:translate(-50%)scale(1.05);box-shadow:0 0 30px 10px #27ae6080}to{background:linear-gradient(90deg,#27ae60 0%,#2ecc71 45%,#27ae60 100%);transform:translate(-50%)scale(1.02);box-shadow:0 0 20px #27ae6066}}@keyframes flashColorRedBlack{0%{background:linear-gradient(90deg,#c0392b 0%,#e74c3c 45%,#c0392b 100%);transform:translate(-50%)scale(1)}15%{background:linear-gradient(90deg,#f1948a 0%,#ec7063 45%,#e74c3c 100%);transform:translate(-50%)scale(1.1);box-shadow:0 0 50px 20px #e74c3cb3}30%{background:linear-gradient(90deg,#c0392b 0%,#e74c3c 45%,#c0392b 100%);transform:translate(-50%)scale(.95);box-shadow:0 0 20px 5px #e74c3c4d}45%{background:linear-gradient(90deg,#f1948a 0%,#ec7063 45%,#e74c3c 100%);transform:translate(-50%)scale(1.08);box-shadow:0 0 40px 15px #e74c3c99}60%{background:linear-gradient(90deg,#c0392b 0%,#e74c3c 45%,#c0392b 100%);transform:translate(-50%)scale(.97);box-shadow:0 0 15px 3px #e74c3c33}80%{background:linear-gradient(90deg,#f1948a 0%,#ec7063 45%,#e74c3c 100%);transform:translate(-50%)scale(1.05);box-shadow:0 0 30px 10px #e74c3c80}to{background:linear-gradient(90deg,#c0392b 0%,#e74c3c 45%,#c0392b 100%);transform:translate(-50%)scale(1.02);box-shadow:0 0 20px #e74c3c66}}@keyframes flashColorYellowBlack{0%{background:linear-gradient(90deg,#d4ac0d 0%,#f1c40f 45%,#d4ac0d 100%);transform:translate(-50%)scale(1)}15%{background:linear-gradient(90deg,#f9e79f 0%,#f7dc6f 45%,#f1c40f 100%);transform:translate(-50%)scale(1.1);box-shadow:0 0 50px 20px #f1c40fb3}30%{background:linear-gradient(90deg,#d4ac0d 0%,#f1c40f 45%,#d4ac0d 100%);transform:translate(-50%)scale(.95);box-shadow:0 0 20px 5px #f1c40f4d}45%{background:linear-gradient(90deg,#f9e79f 0%,#f7dc6f 45%,#f1c40f 100%);transform:translate(-50%)scale(1.08);box-shadow:0 0 40px 15px #f1c40f99}60%{background:linear-gradient(90deg,#d4ac0d 0%,#f1c40f 45%,#d4ac0d 100%);transform:translate(-50%)scale(.97);box-shadow:0 0 15px 3px #f1c40f33}80%{background:linear-gradient(90deg,#f9e79f 0%,#f7dc6f 45%,#f1c40f 100%);transform:translate(-50%)scale(1.05);box-shadow:0 0 30px 10px #f1c40f80}to{background:linear-gradient(90deg,#d4ac0d 0%,#f1c40f 45%,#d4ac0d 100%);transform:translate(-50%)scale(1.02);box-shadow:0 0 20px #f1c40f66}}@keyframes flashColorGreenShowBlack{0%{background:linear-gradient(90deg,#27ae60 0%,#2ecc71 45%,#27ae60 100%);transform:translate(-50%)scale(1)}10%{background:linear-gradient(90deg,#d5f5e3 0%,#82e0aa 45%,#27ae60 100%);transform:translate(-50%)scale(1.15);box-shadow:0 0 60px 25px #27ae60e6}25%{background:linear-gradient(90deg,#27ae60 0%,#2ecc71 45%,#27ae60 100%);transform:translate(-50%)scale(.93);box-shadow:0 0 20px 5px #27ae604d}40%{background:linear-gradient(90deg,#d5f5e3 0%,#82e0aa 45%,#27ae60 100%);transform:translate(-50%)scale(1.12);box-shadow:0 0 50px 20px #27ae60b3}60%{background:linear-gradient(90deg,#27ae60 0%,#2ecc71 45%,#27ae60 100%);transform:translate(-50%)scale(.96);box-shadow:0 0 15px 3px #27ae6033}80%{background:linear-gradient(90deg,#d5f5e3 0%,#82e0aa 45%,#27ae60 100%);transform:translate(-50%)scale(1.07);box-shadow:0 0 35px 12px #27ae6080}to{background:linear-gradient(90deg,#27ae60 0%,#2ecc71 45%,#27ae60 100%);transform:translate(-50%)scale(1.02);box-shadow:0 0 20px #27ae6066}}.keyboard-card{background:#fff;border:1px solid #e7eaf0;border-radius:20px;width:100%;margin-top:16px;padding:30px 20px 22px;position:relative;box-shadow:0 10px 30px #1f2a410f}.keyboard-feedback{z-index:30;white-space:nowrap;text-align:center;border-radius:12px;min-width:200px;padding:10px 24px;font-size:18px;font-weight:700;animation:.3s slideDown;position:absolute;top:-60px;left:50%;transform:translate(-50%);box-shadow:0 4px 20px #00000026}.keyboard-feedback.correct{color:#fff;background:#27ae60;border:2px solid #1e8449}.keyboard-feedback.incorrect{color:#fff;background:#e74c3c;border:2px solid #c0392b}@keyframes slideDown{0%{opacity:0;transform:translate(-50%)translateY(-20px)}to{opacity:1;transform:translate(-50%)translateY(0)}}.piano-key-label-reference{color:#000;pointer-events:none;text-shadow:0 1px 3px #0000004d;z-index:10;justify-content:center;align-items:center;width:28px;height:28px;font-size:30px;font-weight:200;transition:all .2s;display:flex;position:absolute;top:80%;left:50%;transform:translate(-50%,-50%)}@media (width<=700px){.piano-key-label-reference{display:none}}@media (width<=1024px){.piano-key-label-reference{width:24px;height:24px;font-size:12px}}@media (width<=768px){.piano-key-label-reference{width:20px;height:20px;font-size:10px}}@media (width<=700px){.keyboard-feedback{min-width:150px;padding:8px 16px;font-size:14px;top:-50px}.keyboard-card{padding:25px 10px 16px}}@media (width<=420px){.keyboard-feedback{min-width:120px;padding:6px 12px;font-size:12px;top:-42px}}