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height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E")}}:root{--primary: #6366f1;--secondary: #ec4899;--bg-dark: #0f172a;--card-bg: rgba(30, 41, 59, .7);--card-border: rgba(255, 255, 255, .1);--text-main: #f1f5f9;--text-muted: #94a3b8}body{margin:0;padding:0;background-color:var(--bg-dark);color:var(--text-main);font-family:Pretendard,-apple-system,BlinkMacSystemFont,system-ui,Roboto,sans-serif;min-height:100vh}.app-container{max-width:600px;margin:0 auto;padding:2rem 1rem;display:flex;flex-direction:column;gap:2rem}.header{text-align:center}.header h1{font-size:2.5rem;font-weight:800;margin:0;background:linear-gradient(to right,var(--primary),var(--secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent}.header p{color:var(--text-muted);margin-top:.5rem}.card{background:var(--card-bg);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--card-border);border-radius:24px;padding:2rem;box-shadow:0 25px 50px -12px 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