:root{--bg: #fafafa;--bg-elev: #ffffff;--border: #e5e5e5;--border-strong: #cfcfcf;--text: #1a1a1a;--text-muted: #6b6b6b;--accent: #2563eb;--accent-hover: #1d4ed8;--danger: #dc2626;--warn: #d97706;--ok: #16a34a;--radius: 6px;--shadow-sm: 0 1px 2px rgba(0,0,0,.04);--shadow: 0 2px 8px rgba(0,0,0,.06);font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;font-size:14px;color:var(--text);background:var(--bg)}*{box-sizing:border-box}html,body,#app{height:100%;margin:0}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}button{font:inherit;color:inherit;background:var(--bg-elev);border:1px solid var(--border);border-radius:var(--radius);padding:8px 14px;cursor:pointer;transition:background .1s,border-color .1s}button:hover{border-color:var(--border-strong)}button.primary{background:var(--accent);color:#fff;border-color:var(--accent)}button.primary:hover{background:var(--accent-hover);border-color:var(--accent-hover)}button.danger{background:var(--bg-elev);color:var(--danger);border-color:var(--danger)}button.icon{padding:8px;line-height:1}input,textarea,select{font:inherit;color:inherit;background:var(--bg-elev);border:1px solid var(--border);border-radius:var(--radius);padding:8px 10px;width:100%}input:focus,textarea:focus,select:focus{outline:2px solid var(--accent);outline-offset:-1px;border-color:var(--accent)}label{display:block;margin-bottom:4px;color:var(--text-muted)}.topbar{height:48px;display:flex;align-items:center;gap:12px;padding:0 16px;border-bottom:1px solid var(--border);background:var(--bg-elev)}.topbar .title{font-weight:600}.topbar .spacer{flex:1}.topbar .avatars{display:flex;gap:4px}.avatar{width:28px;height:28px;border-radius:50%;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:600}.container{max-width:960px;margin:0 auto;padding:24px}.container.wide{max-width:1200px}.card{background:var(--bg-elev);border:1px solid var(--border);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow-sm)}.grid{display:grid;gap:12px;grid-template-columns:repeat(auto-fill,minmax(220px,1fr))}.board-card{background:var(--bg-elev);border:1px solid var(--border);border-radius:var(--radius);padding:16px;cursor:pointer;transition:border-color .1s,transform .1s}.board-card:hover{border-color:var(--accent);transform:translateY(-1px)}.board-card .name{font-weight:600;margin-bottom:4px}.board-card .meta{font-size:12px;color:var(--text-muted)}.tool-rail{width:48px;background:var(--bg-elev);border-right:1px solid var(--border);display:flex;flex-direction:column;gap:4px;padding:8px 4px}.tool-button{width:40px;height:40px;display:flex;align-items:center;justify-content:center;border-radius:var(--radius);border:1px solid transparent;background:transparent;cursor:pointer;font-size:18px}.tool-button:hover{background:var(--bg)}.tool-button.active{background:var(--accent);color:#fff}.board-wrap{display:flex;height:100vh;flex-direction:column}.board-main{display:flex;flex:1;min-height:0}.canvas-host{flex:1;position:relative;overflow:hidden;background:#fcfcfc;background-image:linear-gradient(to right,#f0f0f0 1px,transparent 1px),linear-gradient(to bottom,#f0f0f0 1px,transparent 1px);background-size:24px 24px}.toast{position:fixed;bottom:24px;right:24px;background:var(--text);color:#fff;padding:12px 16px;border-radius:var(--radius);box-shadow:var(--shadow);z-index:100}.banner-warn{background:#fff7ed;border-left:3px solid var(--warn);padding:12px 16px;margin-bottom:12px}.banner-err{background:#fef2f2;border-left:3px solid var(--danger);padding:12px 16px;margin-bottom:12px}table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--border)}th{color:var(--text-muted);font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.04em}.breadcrumb{font-size:14px;color:var(--text-muted)}.breadcrumb a{color:var(--text-muted)}.breadcrumb .sep{margin:0 6px}.row{display:flex;gap:8px;align-items:center}.row.between{justify-content:space-between}.muted{color:var(--text-muted);font-size:12px}.cursor-flag{position:absolute;pointer-events:none;font-size:11px;background:var(--accent);color:#fff;padding:1px 6px;border-radius:3px;transform:translate(8px,8px);white-space:nowrap}