:root{--bg-color-start: #1f283e;--bg-color-end: #4a546e;--card-bg-color: rgba(255, 255, 255, .1);--text-primary: #ffffff;--text-secondary: #c0c0c0;--accent-color: #00aaff;--accent-hover: #0088cc;--border-color: rgba(255, 255, 255, .2);--shadow-color: rgba(0, 0, 0, .2);--error-color: #ff4d4d;--success-color: #4adeaa;--warning-color: #fbbf24;--font-family: "Poppins", sans-serif}*{margin:0;padding:0;box-sizing:border-box}body{font-family:var(--font-family);color:var(--text-primary);background-color:var(--bg-color-start);overflow:hidden}.background-container{position:fixed;top:0;left:0;width:100%;height:100%;z-index:-1;background:linear-gradient(135deg,var(--bg-color-start),var(--bg-color-end));background-size:200% 200%;animation:gradient-animation 15s ease infinite}@keyframes gradient-animation{0%{background-position:0% 50%}50%{background-position:100% 50%}to{background-position:0% 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