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solid rgba(255,255,255,.2)}.app-header h1{color:#fff;font-size:clamp(1.8rem,5vw,2.5rem);font-weight:300;text-shadow:0 2px 4px rgba(0,0,0,.3);margin:0;padding:0 1rem}.app-main{flex:1;display:flex;align-items:center;justify-content:center;padding:clamp(1rem,3vw,2rem);overflow-y:auto;-webkit-overflow-scrolling:touch;min-height:0;position:relative}.card{background:#fff;border-radius:16px;box-shadow:0 20px 40px #0000001a;padding:clamp(1rem,4vw,2rem);max-width:600px;width:100%;margin:0 auto;max-width:calc(100vw - 2rem)}.btn{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;padding:clamp(.8rem,3vw,1rem) clamp(1.5rem,4vw,2rem);border-radius:8px;font-size:clamp(1rem,2.5vw,1.1rem);font-weight:500;cursor:pointer;transition:all .3s ease;display:block;width:100%;margin:.5rem 0;min-height:44px;-webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent}.btn:hover{transform:translateY(-2px);box-shadow:0 10px 20px #0003}.btn:active{transform:translateY(0);transition:transform .1s ease}.btn-secondary{background:#6c757d;color:#fff}.btn-success{background:#28a745}.btn-danger{background:#dc3545}.progress-bar{width:100%;height:8px;background:#e9ecef;border-radius:4px;overflow:hidden;margin:1rem 0}.progress-fill{height:100%;background:linear-gradient(135deg,#667eea,#764ba2);transition:width .3s ease}@media (max-width: 768px){body{position:relative;width:100%;height:auto;min-height:100vh;min-height:-webkit-fill-available}#app{overflow-y:visible;-webkit-overflow-scrolling:touch;height:auto;min-height:100vh;min-height:-webkit-fill-available}.app-header{position:sticky;top:0;z-index:100}.app-header h1{font-size:1.8rem;padding:0 .5rem}.app-main{padding:1rem .5rem}.card{margin:0;padding:1rem;border-radius:12px;box-shadow:0 10px 25px #00000026}.btn{font-size:1rem;padding:.875rem 1.5rem;margin:.75rem 0}}@media (max-width: 480px){.app-header h1{font-size:1.5rem}.card{padding:.75rem}.btn{padding:.8rem 1rem;font-size:.95rem}}@media (max-height: 500px) and (orientation: landscape){.app-header{padding:.5rem 0}.app-header h1{font-size:1.4rem}.app-main{padding:.5rem}.card{padding:1rem}}