@import url("https://fonts.googleapis.com/css2?family=Pretendard:wght@400;500;600;700&display=swap");*{box-sizing:border-box;margin:0;padding:0;font-family:Pretendard,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}body{background:#0f172a;color:#f8fafc;justify-content:center;align-items:center}.pwa-container,body{min-height:100vh;display:flex}.pwa-container{width:100%;max-width:420px;background:#1e293b;box-shadow:0 25px 50px -12px rgba(0,0,0,.5);flex-direction:column;position:relative;overflow:hidden}.header{padding:20px;background:linear-gradient(135deg,#3b82f6,#1d4ed8);display:flex;justify-content:space-between;align-items:center;border-bottom-left-radius:20px;border-bottom-right-radius:20px}.card{background:hsla(0,0%,100%,.05);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid hsla(0,0%,100%,.1);border-radius:16px;padding:20px;margin:16px}.btn{width:100%;padding:14px;border:none;border-radius:12px;font-size:16px;font-weight:600;cursor:pointer;transition:all .2s ease}.btn-primary{background:linear-gradient(135deg,#3b82f6,#2563eb);color:#fff}.btn-primary:hover{opacity:.9;transform:translateY(-1px)}.btn-danger{background:#ef4444;color:#fff}.modal-overlay{position:absolute;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.8);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:flex;justify-content:center;align-items:center;z-index:50}.modal-content{background:#1e293b;border-radius:20px;padding:24px;width:90%;max-width:360px;border:1px solid hsla(0,0%,100%,.1);text-align:center}.qr-box{background:#fff;padding:20px;border-radius:16px;display:inline-block;margin:16px 0}.timer{font-size:24px;font-weight:700;color:#38bdf8;margin:10px 0}.pin-input{width:100%;padding:14px;font-size:24px;letter-spacing:12px;text-align:center;border-radius:12px;border:1px solid #334155;background:#0f172a;color:#fff;margin:16px 0}