*,*:before,*:after{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,sans-serif;background:#f5f5f5}.page-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;flex-wrap:wrap;gap:12px}.page-header h2{margin:0;font-size:20px;font-weight:600}.thing-model-layout{display:grid;grid-template-columns:280px 1fr;gap:16px;min-height:520px}.thing-model-tree{background:#fff;border-radius:8px;padding:12px;border:1px solid #f0f0f0;overflow:auto}.thing-model-editor{background:#fff;border-radius:8px;padding:16px;border:1px solid #f0f0f0;overflow:auto}.login-page{min-height:100%;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#1677ff,#0958d9,#001d66)}.login-card{width:100%;max-width:400px;box-shadow:0 8px 24px #00000026}