@import"https://cdn.jsdelivr.net/gh/orioncactus/pretendard/dist/web/static/pretendard.css";:root{--bg-color: #05070a;--card-bg: rgba(20, 25, 35, .95);--primary-color: #4a90e2;--primary-hover: #357abd;--secondary-color: #2c3e50;--secondary-hover: #34495e;--text-color: #ffffff;--accent-color: #00d2ff}*{margin:0;padding:0;box-sizing:border-box;font-family:Pretendard,-apple-system,BlinkMacSystemFont,system-ui,Roboto,sans-serif}body{background-color:var(--bg-color);color:var(--text-color);width:100%;height:100vh;display:flex;justify-content:center;align-items:center;overflow:hidden}.space-background{position:fixed;top:0;left:0;width:100%;height:100%;z-index:-1;background:radial-gradient(circle at center,#1a2a4a,#05070a)}.stars{position:absolute;width:100%;height:100%;background-image:radial-gradient(1px 1px at 20px 30px,#fff,#0000),radial-gradient(1px 1px at 40px 70px,#fff,#0000),radial-gradient(2px 2px at 50px 160px,#fff,#0000),radial-gradient(1px 1px at 90px 40px,#fff,#0000),radial-gradient(1.5px 1.5px at 130px 80px,#fff,#0000),radial-gradient(1px 1px at 160px 120px,#fff,#0000);background-repeat:repeat;background-size:200px 200px;opacity:.3;animation:twinkle 5s infinite alternate}@keyframes twinkle{0%{opacity:.2}to{opacity:.5}}.nebula{position:absolute;width:100%;height:100%;background:radial-gradient(circle at 20% 30%,rgba(74,144,226,.1),transparent 40%),radial-gradient(circle at 80% 70%,rgba(0,210,255,.1),transparent 40%)}.container{padding:20px;width:100%;max-width:500px;z-index:10}.card{background:var(--card-bg);border:1px solid rgba(255,255,255,.1);border-radius:24px;padding:40px;text-align:center;box-shadow:0 10px 30px #00000080}h1{font-size:1.5rem;font-weight:700;margin-bottom:24px;background:linear-gradient(to right,#4a90e2,#00d2ff);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.main-msg{font-size:1.25rem;line-height:1.6;margin-bottom:30px;color:#ffffffe6}.timer-section{margin-bottom:30px}#timer-text{font-size:.95rem;margin-bottom:12px;color:#fff9}#seconds{font-weight:700;color:var(--accent-color);margin-right:2px}.progress-bar-container{width:100%;height:4px;background:#ffffff1a;border-radius:2px;overflow:hidden}#progress-bar{width:0%;height:100%;background:linear-gradient(to right,var(--primary-color),var(--accent-color));transition:width 1s linear}.button-group{display:flex;flex-direction:column;gap:12px}button{width:100%;padding:14px;border-radius:12px;border:none;font-size:1rem;font-weight:600;cursor:pointer;transition:all .2s ease-in-out}.primary-btn{background:linear-gradient(135deg,var(--primary-color),#3a7bd5);color:#fff;box-shadow:0 4px 15px #4a90e24d}.primary-btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px #4a90e266}.primary-btn:active{transform:translateY(0)}.secondary-btn{background:var(--secondary-color);color:#fffc;border:1px solid rgba(255,255,255,.1)}.secondary-btn:hover{background:var(--secondary-hover);color:#fff}@media(max-width:480px){.card{padding:30px 20px}h1{font-size:1.25rem}.main-msg{font-size:1.1rem}}