:root{--primary: #6c5ce7;--accent: #00b894;--muted: #6b7280;--bg: #f7f7fb}body{font-family:Inter,system-ui,Arial;background:var(--bg);margin:0}.app-header{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;background:#fff;border-bottom:1px solid #eee}.logo{font-weight:700;color:var(--primary)}.main-nav a{margin:0 10px;color:#333;text-decoration:none}.header-actions .btn-link{background:none;border:none;color:var(--primary);cursor:pointer}.app-main{padding:24px;min-height:calc(100vh - 120px)}.app-footer{padding:16px;text-align:center;color:var(--muted);font-size:13px}