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var(--border-strong);background:var(--surface);height:34px;color:var(--text);border-radius:6px;padding:0 14px;font-size:13px;font-weight:500}.gate-btn:hover{background:var(--surface-3)}.gate-btn.primary{background:var(--accent);border-color:var(--accent);color:var(--surface)}.gate-btn.primary:hover{filter:brightness(1.08)}.gate-btn.ghost{color:var(--text-3);background:0 0}.gate-btn.ghost:hover{color:var(--text);background:var(--surface-3)}.solution-head{justify-content:space-between;align-items:center;gap:10px;margin-bottom:10px;display:flex}.solution-head .section-intro{margin:0}body.focus-mode :is(.sidebar,.topbar,.summary,.filters,.problem-list,.alert,.backup-message){display:none}body.focus-mode .main{flex-direction:column;padding:0;display:flex}body.focus-mode .workspace{border:0;border-radius:0;flex:1;grid-template-columns:minmax(0,1fr)}body.focus-mode .detail-head{padding:12px 24px 0}@media (width<=860px){body.focus-mode .main{display:block}.app-shell.sidebar-hidden .sidebar{display:none}}