:root{--bg: #1b1a19;--bg-side: #201f3a;--bg-panel: #252423;--bg-hover: #323130;--border: #3b3a39;--text: #f3f2f1;--text-dim: #a19f9d;--accent: #6b4eff}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--bg);color:var(--text);font-family:Segoe UI,system-ui,-apple-system,sans-serif;font-size:13px}.app{display:grid;grid-template-columns:280px 1fr;grid-template-rows:48px 1fr 26px;grid-template-areas:"topbar topbar" "sidebar main" "footer footer";height:100vh}.topbar{grid-area:topbar;display:flex;align-items:center;gap:16px;padding:0 16px;background:var(--bg-panel);border-bottom:1px solid var(--border)}.brand{font-weight:600}.actions{display:flex;gap:6px}.action{background:transparent;color:var(--text);border:1px solid var(--border);border-radius:4px;padding:4px 10px;cursor:not-allowed;opacity:.7}.search{margin-left:auto;background:var(--bg);border:1px solid var(--border);border-radius:4px;color:var(--text);padding:6px 10px;width:240px}.sidebar{grid-area:sidebar;background:var(--bg-side);border-right:1px solid var(--border);padding:12px;overflow-y:auto}.account{font-weight:600;margin-bottom:12px;color:var(--text-dim);word-break:break-all}.group-title{margin:12px 0 4px;text-transform:uppercase;font-size:11px;color:var(--text-dim)}.folder{padding:6px 8px;border-radius:4px;cursor:pointer}.folder:hover{background:#ffffff0f}.main{grid-area:main;display:grid;grid-template-rows:45% 55%;overflow:hidden}.list{overflow-y:auto;border-bottom:1px solid var(--border)}.reading{overflow-y:auto;background:var(--bg-panel)}.placeholder{display:flex;align-items:center;justify-content:center;text-align:center;color:var(--text-dim);border-bottom:1px solid var(--border);padding:24px;line-height:1.6}.list .placeholder:last-child{border-bottom:none;background:var(--bg-panel)}code{background:#ffffff14;padding:1px 4px;border-radius:3px}.footer{grid-area:footer;background:var(--bg-panel);border-top:1px solid var(--border);display:flex;align-items:center;padding:0 12px}.statusbar{display:flex;align-items:center;gap:8px;color:var(--text-dim);font-size:12px}.statusbar .sep{opacity:.4}.dot{width:8px;height:8px;border-radius:50%;display:inline-block}.dot.ok{background:#4caf50}.dot.ko{background:#e74c3c}