:root{--bg:#f4f7fb;--bg-soft:#eef3fb;--surface:#ffffff;--surface-muted:#f8fafc;--text:#0f172a;--text-muted:#475569;--text-soft:#64748b;--border:#dbe3ef;--border-strong:#c7d4e6;--primary:#2563eb;--primary-strong:#1d4ed8;--primary-soft:#e8f0ff;--success:#059669;--danger:#dc2626;--warning:#d97706;--radius-sm:10px;--radius-md:14px;--radius-lg:18px;--shadow-sm:0 8px 20px rgba(15,23,42,0.06);--shadow-md:0 14px 36px rgba(15,23,42,0.1)}body,html{max-width:100vw;overflow-x:hidden}body{margin:0;background:linear-gradient(180deg,var(--bg) 0,#edf3fc 100%);color:var(--text);font-family:Inter,Segoe UI,-apple-system,BlinkMacSystemFont,Helvetica Neue,Arial,sans-serif;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}*{box-sizing:border-box}a{color:inherit}.app-shell{display:flex;min-height:100vh}.sidebar{width:250px;background:#0b1220;color:#f8fafc;padding:22px 16px;border-right:1px solid rgba(148,163,184,.2)}.sidebar-title{margin:0 0 18px;font-size:17px;font-weight:700;letter-spacing:.01em}.sidebar-nav{display:flex;flex-direction:column;gap:8px}.nav-item{padding:10px 12px;border-radius:10px;color:#cbd5e1;text-decoration:none;font-size:14px}.nav-item.active,.nav-item:hover{background:rgba(59,130,246,.2);color:#ffffff}.content-shell{flex:1 1;display:flex;flex-direction:column}.top-header{background:rgba(255,255,255,.9);border-bottom:1px solid var(--border);padding:16px 24px;font-weight:600;color:var(--text);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.immersive-main,.main-content{padding:26px}.marketing-main{min-height:100vh}.panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);padding:18px}.form-grid{display:grid;grid-template-columns:1fr;gap:12px;margin-top:14px;margin-bottom:14px;max-width:480px}input,select,textarea{border:1px solid var(--border-strong);border-radius:10px;padding:10px 12px;background:#ffffff;color:var(--text);font-size:14px;outline:none;transition:border-color .16s ease,box-shadow .16s ease}input:focus,select:focus,textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,99,235,.14)}button{border:1px solid transparent;border-radius:10px;padding:10px 14px;background:var(--primary);color:#ffffff;cursor:pointer;font-weight:600;font-size:14px;transition:transform .12s ease,box-shadow .16s ease,opacity .16s ease,background .16s ease}button:hover{transform:translateY(-1px);box-shadow:0 8px 20px rgba(37,99,235,.25)}button:disabled{opacity:.58;cursor:not-allowed;transform:none;box-shadow:none}.output{color:var(--success)}.error{color:var(--danger)}.log-list{margin-top:12px;padding-left:18px}@media (max-width:1000px){.app-shell{flex-direction:column}.sidebar{width:100%;border-right:none;border-bottom:1px solid rgba(148,163,184,.2)}.sidebar-nav{flex-direction:row;flex-wrap:wrap}}@media (max-width:760px){.immersive-main,.main-content{padding:14px}}body.demo-mode .sidebar,body.demo-mode .top-header{display:none}body.demo-mode .immersive-main,body.demo-mode .main-content{padding:24px;max-width:1280px;margin:0 auto;width:100%}