*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--primary: #62afc9;--primary-dark: #d6eef0;--primary-light: #EBF6F9;--sidebar-bg: #003f50;--nav-active-bg: rgba(98,175,201,.3);--chat-bg: #d6eef0;--bg: #F8FAFC;--card: #FFFFFF;--border: #E2E8F0;--text: #0F172A;--text-muted: #64748B;--success: #22C55E;--success-bg: #F0FDF4;--warning: #F59E0B;--error: #EF4444;--error-bg: #FEF2F2;--sidebar-w: 240px;--radius: 8px;--shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.04);--shadow-md: 0 4px 6px -1px rgba(0,0,0,.08), 0 2px 4px -1px rgba(0,0,0,.04)}body{font-family:Inter,system-ui,-apple-system,sans-serif;font-size:14px;line-height:1.5;color:var(--text);background:var(--bg)}a{color:inherit;text-decoration:none}button{cursor:pointer;font-family:inherit;font-size:14px}input,textarea,select{font-family:inherit;font-size:14px}.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:var(--radius);border:none;font-weight:500;transition:background 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