:root{--bg: #f7f7f8;--bg-panel: #ffffff;--bg-soft: #f1f2f4;--bg-hover: #ebecef;--bg-active: #e4e6ea;--border: #e3e5e8;--border-strong: #d2d5da;--text: #1c1d1f;--text-muted: #6b7280;--text-faint: #9ca3af;--accent: #2563eb;--accent-hover: #1d4ed8;--accent-soft: #e8efff;--danger: #dc2626;--radius: 8px;--radius-sm: 6px}*,*:before,*:after{box-sizing:border-box}html,body{margin:0;padding:0;height:100%;background:var(--bg);color:var(--text);font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-size:14px;line-height:1.4;-webkit-font-smoothing:antialiased}body{position:fixed;top:0;right:0;bottom:0;left:0;width:100%;overflow:hidden;overscroll-behavior:none}#app{width:100%;height:100vh;height:100dvh;height:var(--app-height, 100dvh);overflow:hidden}button{font:inherit}.btn{border:1px solid transparent;border-radius:var(--radius-sm);padding:8px 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