:root{--bg:#07080d;--panel:#0d1018;--panel2:#111521;--line:#202536;--text:#f6f7fb;--muted:#8c93a7;--purple:#7c5cff;--purple2:#9a72ff;--green:#3ee6a0;--red:#ff5b78;--amber:#ffc568;--radius:16px}*{box-sizing:border-box}html,body{margin:0;min-height:100%;background:radial-gradient(circle at 70% 0,#171229 0,transparent 30%),var(--bg);color:var(--text);font-family:Inter,Pretendard,"Noto Sans KR",system-ui,sans-serif}button,input,select,textarea{font:inherit}.app-shell{min-height:100vh}.topbar{height:72px;display:flex;align-items:center;padding:0 24px;border-bottom:1px solid var(--line);background:rgba(7,8,13,.88);backdrop-filter:blur(20px);position:sticky;top:0;z-index:20}.brand{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;font-weight:800;width:330px}.brand-mark{display:grid;place-items:center;width:34px;height:34px;border-radius:11px;background:linear-gradient(135deg,var(--purple),#4b8cff);box-shadow:0 10px 30px rgba(124,92,255,.35)}.main-tabs{display:flex;height:100%;gap:28px}.tab{border:0;background:none;color:var(--muted);font-weight:700;padding:0 6px;position:relative;cursor:pointer}.tab.is-active{color:#fff}.tab.is-active:after{content:"";position:absolute;left:0;right:0;bottom:0;height:3px;border-radius:3px;background:linear-gradient(90deg,var(--purple),#b48cff)}.top-actions{margin-left:auto;display:flex;align-items:center;gap:8px;color:var(--muted);font-size:13px}.server-dot{width:8px;height:8px;border-radius:50%;background:var(--green);box-shadow:0 0 14px var(--green)}.icon-btn{display:grid;place-items:center;text-decoration:none;background:var(--panel2);border:1px solid var(--line);color:#fff;width:36px;height:36px;border-radius:10px}.workspace{display:grid;grid-template-columns:360px minmax(0,1fr);min-height:calc(100vh - 72px)}.sidebar{border-right:1px solid var(--line);padding:24px 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