:root{--primary: #2563eb;--primary-dark: #1d4ed8;--primary-light: #3b82f6;--secondary: #10b981;--bg: #0f172a;--bg-card: #1e293b;--bg-card-hover: #334155;--text: #f8fafc;--text-muted: #94a3b8;--border: #334155;--gold: #fbbf24;--silver: #9ca3af;--bronze: #d97706}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;background:var(--bg);color:var(--text);min-height:100vh}.app{min-height:100vh;display:flex;flex-direction:column}.header{background:var(--bg-card);border-bottom:1px solid var(--border);padding:1rem 2rem;display:flex;justify-content:space-between;align-items:center}.logo{display:flex;align-items:center;gap:.75rem;font-size:1.5rem;font-weight:700;color:var(--text);text-decoration:none}.logo img{height:40px}.logo-text{font-family:Poppins,sans-serif;font-weight:500;color:#1abc9c}.user-info{display:flex;align-items:center;gap:1rem}.user-avatar{width:40px;height:40px;border-radius:50%;border:2px solid 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