*{margin:0;padding:0;box-sizing:border-box}body.dark{--bg-primary: #0f172a;--bg-secondary: #1e293b;--bg-card: #334155;--text-primary: #f1f5f9;--text-secondary: #cbd5e1;--accent-blue: #3b82f6;--accent-purple: #8b5cf6;--accent-red: #ef4444;--accent-green: #10b981;--border-radius: 12px;--shadow: 0 4px 6px -1px rgba(0, 0, 0, .3)}body.light{--bg-primary: #f8fafc;--bg-secondary: #ffffff;--bg-card: #f1f5f9;--text-primary: #1e293b;--text-secondary: #64748b;--accent-blue: #3b82f6;--accent-purple: #8b5cf6;--accent-red: #ef4444;--accent-green: #10b981;--shadow: 0 4px 6px -1px rgba(0, 0, 0, .1)}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg-primary);color:var(--text-primary);line-height:1.5;transition:background-color .3s ease,color .3s ease;min-height:100vh}.app{min-height:100vh;padding:20px}.dashboard-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px;padding:20px 24px;background:var(--bg-secondary);border-radius:var(--border-radius);box-shadow:var(--shadow)}.dashboard-header h1{font-size:28px;font-weight:700;background:linear-gradient(135deg,var(--accent-blue),var(--accent-purple));-webkit-background-clip:text;-webkit-text-fill-color:transparent}.header-left{display:flex;align-items:center;gap:20px}.user-info{display:flex;align-items:center;gap:8px}.user-badge{background:var(--accent-purple);color:#fff;padding:6px 12px;border-radius:20px;font-size:14px;font-weight:500}.add-note-btn{display:flex;align-items:center;gap:6px;padding:8px 16px;background:var(--accent-green);color:#fff;border:none;border-radius:8px;cursor:pointer;transition:all .2s ease;font-size:14px;font-weight:500}.add-note-btn:hover{background:#059669;transform:translateY(-1px)}.logout-btn{display:flex;align-items:center;justify-content:center;padding:6px;background:rgba(239,68,68,.1);border:1px solid 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