:root{--text-main:#5c4b51;--accent-color:#ffb6c1;--glass-bg:rgba(255,255,255,.75);--glass-black-bg:rgba(200,200,200,.6);--glass-border:rgba(255,255,255,.8)}*{box-sizing:border-box;-webkit-touch-callout:none;-webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent}body{background:var(--bg-color);color:#fff;font-family:'Helvetica Neue',Arial,sans-serif;display:flex;flex-direction:column;align-items:center;padding:20px;margin:0;overflow-x:auto;user-select:none;background-image:radial-gradient(circle at center,#222 0%,#000 100%)}body.background{background-color:#f2f9ff;background-image:url(https://yume-miten.jp/wp-content/uploads/2025/07/background.png);background-position:center top;background-size:cover;background-repeat:no-repeat;background-attachment:fixed}header{text-align:center;margin-bottom:20px}h1{font-size:2.5rem;margin:0;color:var(--accent-color);background-color:var(--glass-bg);padding:10px 30px;border-radius:50px;border:3px solid #fff;box-shadow:0 8px 25px rgba(0,0,0,.05);display:inline-block}.subtitle{font-weight:700;color:#fff;background-color:rgba(255,182,193,.9);display:inline-block;padding:5px 20px;border-radius:20px;margin-top:-10px;position:relative;z-index:2}.game-container{background-color:rgba(255,255,255,.4);backdrop-filter:blur(12px);border-radius:24px;box-shadow:0 15px 35px rgba(0,0,0,.1);border:1px solid rgba(255,255,255,.6);padding:10px;width:100%;max-width:800px;display:flex;flex-direction:column;gap:20px}.info-area{background:var(--glass-bg);border-radius:15px;padding:10px;text-align:center;border:2px solid #fff}.control-area{display:flex;flex-direction:column;align-items:center;gap:15px}.x-share-button{background-color:#000;color:#fff;border:none;border-radius:9999px;padding:10px 20px;font-size:16px;font-weight:700;cursor:pointer;transition:background-color 0.2s}.x-share-button:hover{background-color:#333}#achievement-container{position:fixed;bottom:20px;right:20px;z-index:10000;display:flex;flex-direction:column;gap:10px;pointer-events:none}.achievement-notification{background:rgba(255,255,255,.95);border-left:5px solid #ffb6c1;border-radius:8px;box-shadow:0 4px 15px rgba(0,0,0,.3);padding:10px 15px;display:flex;align-items:center;gap:12px;animation:slideInRight 0.5s cubic-bezier(.25,1,.5,1) forwards;pointer-events:auto;width:max-content;max-width:80vw}.achievement-notification.hide{animation:slideOutRight 0.5s cubic-bezier(.25,1,.5,1) forwards}.achieve-icon{font-size:24px}.achieve-text{display:flex;flex-direction:column}.achieve-label{font-size:10px;color:#888;font-weight:700;margin-bottom:2px}.achieve-title{font-size:14px;font-weight:700;color:#5c4b51}@keyframes slideInRight{from{transform:translateX(120%);opacity:0}to{transform:translateX(0);opacity:1}}@keyframes slideOutRight{from{transform:translateX(0);opacity:1}to{transform:translateX(120%);opacity:0}}.color-white{color:#FFFFFF!important;text-shadow:2px 2px 0 rgba(0,0,0,.8),0 0 10px #FFFFFF!important}.color-blue{color:#44AAFF!important;text-shadow:2px 2px 0 rgba(0,0,0,.8),0 0 10px #44AAFF!important}.color-green{color:#22FF22!important;text-shadow:2px 2px 0 rgba(0,0,0,.8),0 0 10px #22FF22!important}.color-red{color:#FF4444!important;text-shadow:2px 2px 0 rgba(0,0,0,.8),0 0 10px #FF4444!important}.color-gold{color:#FFD700!important;text-shadow:2px 2px 0 rgba(0,0,0,.8),0 0 10px rgba(255,215,0,.8),0 0 20px rgba(255,215,0,.5)!important}@keyframes rainbow-text{0%{background-position:0% 50%}100%{background-position:200% 50%}}.color-rainbow{background-image:linear-gradient(to right,#ff0000,#ff7f00,#ffff00,#00ff00,#0000ff,#4b0082,#8b00ff,#ff0000)!important;background-size:200% auto!important;color:transparent!important;-webkit-background-clip:text!important;background-clip:text!important;animation:rainbow-text 3s linear infinite!important;text-shadow:none!important}.help-btn{background:var(--text-main);color:#fff;border:2px solid #fff;padding:8px 20px;border-radius:20px;font-weight:700;cursor:pointer;margin-bottom:15px;box-shadow:0 4px 10px rgba(0,0,0,.2)}.modal{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.8);z-index:1000;display:flex;justify-content:center;align-items:center}.modal-content{background:#fff;border-radius:15px;padding:20px;width:90%;max-width:640px;max-height:80vh;overflow-y:auto;position:relative;color:var(--text-main)}.close-btn{position:absolute;top:10px;right:15px;font-size:2rem;cursor:pointer;color:#888;transition:all 0.3s cubic-bezier(.34,1.56,.64,1)!important}.close-btn:hover{color:#ff4444!important;transform:scale(1.2) rotate(90deg)}.close-btn:active{transform:scale(.9) rotate(90deg)}.help-item{display:flex;gap:15px;margin-bottom:15px;align-items:center;border-bottom:1px solid #eee;padding-bottom:15px}.help-item h3{margin:0 0 5px 0;font-size:1.1rem;color:#d84b6b}.help-item p{margin:0;font-size:.85rem;line-height:1.4}.volume-container-glass{margin:10px auto;padding:12px 25px;width:90%;max-width:350px;background:rgba(255,255,255,.5);backdrop-filter:blur(8px);border-radius:50px;border:2px solid rgba(255,182,193,.8);box-shadow:0 8px 20px rgba(255,182,193,.2);display:flex;flex-direction:column;gap:5px}.volume-header{display:flex;justify-content:space-between;align-items:center;padding:0 5px}.volume-label{color:#d84b6b;font-weight:700;font-size:14px}.volume-percentage{color:#5c4b51;font-family:'Courier New',monospace;font-size:14px;font-weight:700}.slider-wrapper{display:flex;align-items:center;height:30px}#volume-slider{-webkit-appearance:none;appearance:none;width:100%;background:transparent;cursor:pointer}#volume-slider::-webkit-slider-runnable-track{width:100%;height:10px;background:linear-gradient(to right,#ffb6c1,#b2d8ff);border-radius:10px;border:1px solid rgba(255,255,255,.5)}#volume-slider::-webkit-slider-thumb{-webkit-appearance:none;height:24px;width:24px;border-radius:50%;background:radial-gradient(circle at 30% 30%,#fff,#ffb6c1 60%,#ff99aa);box-shadow:0 2px 6px rgba(0,0,0,.15);margin-top:-8px;border:2px solid #fff;transition:transform 0.2s}.footer-links{margin-top:30px}.back-link{display:inline-block;text-decoration:none;background:rgba(255,255,255,.8);color:var(--text-main);border:2px solid var(--accent-color);padding:8px 20px;border-radius:20px;font-weight:700}.back-link:hover{background:rgba(255,255,255,1)!important;transform:translateY(-2px);box-shadow:0 6px 15px rgba(255,182,193,.4)!important;border-color:#ff6b81!important}.back-link:active{transform:translateY(1px) scale(.98);box-shadow:0 2px 4px rgba(255,182,193,.2)!important}.copyright{width:100%;background:rgba(255,255,255,.9);padding:2px;color:#333;text-align:center;font-size:11px;margin-top:30px}.hidden{display:none!important}