:root{color-scheme:dark;--bg:#0b0d10;--card:#14181d;--panel:#0f1318;--border:#232a31;--fg:#e7edf3;--muted:#8a97a6;--accent:#3b82f6;--error:#f87171}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:var(--bg);color:var(--fg);font:15px/1.5 system-ui,-apple-system,Segoe UI,Roboto,sans-serif}a{color:var(--accent)}.app-shell{display:flex;min-height:100vh}.sidebar{position:-webkit-sticky;position:sticky;top:0;height:100vh;width:240px;flex-shrink:0;background:var(--panel);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:16px 12px}.sidebar-logo{display:flex;align-items:center;gap:10px;padding:8px 10px 16px;font-size:18px;font-weight:700;letter-spacing:.2px}.sidebar-logo svg{flex-shrink:0}.sidebar-bottom,.sidebar-nav{display:flex;flex-direction:column;gap:2px}.sidebar-bottom{margin-top:auto;border-top:1px solid var(--border);padding-top:10px}.sidebar-link{display:flex;align-items:center;gap:11px;padding:9px 12px;border-radius:8px;color:var(--muted);text-decoration:none;font-size:14px}.sidebar-link:hover{background:#0e1216;color:var(--fg)}.sidebar-link.active{background:rgba(59,130,246,.15);color:var(--fg)}.sidebar-link svg{flex-shrink:0;opacity:.85}.sidebar-profile{padding:8px 12px 2px}.sidebar-email{font-size:12px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.sidebar-signout{margin:6px 0 0;width:auto;padding:4px 0;background:none;border:0;color:var(--accent);font-size:13px;cursor:pointer}.app-main{flex:1 1;min-width:0;height:100vh;overflow:auto;padding:26px 32px}.center-screen{min-height:100vh;display:grid;place-items:center}.dash-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));grid-gap:14px;gap:14px;margin-top:18px}.dash-card{display:block;padding:18px;background:var(--card);border:1px solid var(--border);border-radius:12px;text-decoration:none;color:var(--fg)}.dash-card:hover{border-color:var(--accent)}.dash-card h3{margin:0 0 4px;font-size:15px}.dash-card p{margin:0;color:var(--muted);font-size:13px}.card{width:min(92vw,420px);padding:28px;background:var(--card);border:1px solid var(--border);border-radius:12px}h1{margin:0 0 4px;font-size:22px}h2{font-size:16px;margin:22px 0 8px}.muted{margin:0 0 18px;color:var(--muted)}form{grid-gap:14px;gap:14px}form,label{display:grid}label{grid-gap:6px;gap:6px;font-size:13px;color:var(--muted)}input,select{padding:10px 12px;background:#0e1216;border:1px solid var(--border);border-radius:8px;color:var(--fg);font-size:15px}button{padding:9px 14px;background:var(--accent);color:#fff;border:0;border-radius:8px;font-size:14px;cursor:pointer}button:hover{filter:brightness(1.08)}button:disabled{opacity:.55;cursor:default}.error{background:rgba(248,113,113,.12);border:1px solid rgba(248,113,113,.4);border-radius:8px;color:var(--error)}.error,.ok{margin:0 0 12px;padding:8px 10px;font-size:13px}.ok{background:rgba(59,130,246,.12);border:1px solid rgba(59,130,246,.4);border-radius:8px}.sheet-page{width:100%}.grid-wrap{height:calc(100vh - 170px);min-height:360px;width:100%}.toolbar{display:flex;align-items:center;gap:10px;margin-bottom:12px;flex-wrap:wrap}.diff-list{margin:8px 0 0;padding-left:18px;max-height:220px;overflow:auto;font-size:13px}.cell-error{background:rgba(248,113,113,.22)}.cell-warning{background:rgba(234,179,8,.18)}