:root{--bg:#0b0b0f;--panel:#14141b;--panel-2:#1c1c26;--line:#2a2a36;--fg:#e9e9f0;--muted:#8b8b9c;--accent:#a99bff;--danger:#ff6b6b;--ok:#4ade80;color-scheme:dark}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--bg);color:var(--fg);font-family:system-ui,-apple-system,Segoe UI,Hiragino Sans,Noto Sans JP,sans-serif;font-size:14px}a{color:inherit;text-decoration:none}button{font:inherit;cursor:pointer;border-radius:8px;border:1px solid var(--line);background:var(--panel-2);color:var(--fg);padding:8px 14px}button:hover:not(:disabled){border-color:var(--accent)}button:disabled{opacity:.5;cursor:not-allowed}button.primary{background:var(--accent);border-color:var(--accent);color:#17131f;font-weight:600}button.danger{color:var(--danger);border-color:#4a2530}input,select,textarea{font:inherit;background:var(--panel-2);border:1px solid var(--line);color:var(--fg);border-radius:8px;padding:9px 12px;width:100%}input:focus,textarea:focus{outline:none;border-color:var(--accent)}.shell{display:grid;grid-template-columns:220px 1fr;min-height:100vh}.sidebar{border-right:1px solid var(--line);background:var(--panel);padding:20px 14px;position:-webkit-sticky;position:sticky;top:0;height:100vh;display:flex;flex-direction:column;gap:6px}.brand{font-size:20px;letter-spacing:4px;margin:4px 8px 18px}.nav-item{padding:9px 12px;border-radius:8px;color:var(--muted)}.nav-item.active,.nav-item:hover{background:var(--panel-2);color:var(--fg)}.nav-item.active{box-shadow:inset 2px 0 0 var(--accent)}.content{padding:28px 32px;max-width:1100px}h1{font-size:20px;font-weight:600;margin:0 0 4px}.subtitle{color:var(--muted);margin:0 0 22px}.card{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:16px}.list{flex-direction:column;gap:10px}.list,.row{display:flex}.row{align-items:center;justify-content:space-between;gap:16px}.muted,.tag{color:var(--muted)}.tag{font-size:11px;padding:3px 8px;border-radius:999px;border:1px solid var(--line)}.tag.open{color:var(--danger);border-color:#4a2530}.tag.done{color:var(--ok);border-color:#23422f}.tag.premium{color:var(--accent);border-color:#38326b}.error{color:var(--danger)}.center{min-height:100vh;display:grid;place-items:center;padding:24px}.login-card{width:100%;max-width:380px;gap:12px}.bubbles,.login-card{display:flex;flex-direction:column}.bubbles{gap:8px;height:55vh;overflow-y:auto;padding:8px 4px}.bubble{max-width:70%;padding:9px 13px;border-radius:14px;background:var(--panel-2);white-space:pre-wrap;word-break:break-word}.bubble.mine{align-self:flex-end;background:#3b3577}.bubble .time{display:block;font-size:10px;color:var(--muted);margin-top:4px}