:root{color-scheme:dark;--rd-bg:#0a0a0a;--rd-surface:#121212;--rd-cyan:#00d1ff;--rd-muted:#94a3b8;--rd-border:#2a2a2a;font-family:system-ui,-apple-system,Segoe UI,sans-serif;background:var(--rd-bg);color:#fff}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:var(--rd-bg)}a{color:var(--rd-cyan)}.shell{display:grid;grid-template-columns:220px 1fr;min-height:100vh}.sidebar{background:var(--rd-bg);border-right:1px solid var(--rd-border);padding:1.25rem 1rem}.sidebar h1{font-size:1.1rem;margin:0 0 .25rem;color:var(--rd-cyan)}.sidebar .sub{font-size:.75rem;margin-bottom:1.5rem}.nav a,.sidebar .sub{color:var(--rd-muted)}.nav a{display:block;text-decoration:none;padding:.45rem .6rem;border-radius:8px;margin-bottom:2px;font-size:.9rem}.nav a.active,.nav a:hover{background:rgba(0,209,255,.12);color:var(--rd-cyan)}.main{padding:1.5rem 2rem}.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));grid-gap:1rem;gap:1rem;margin:1.5rem 0}.card{background:var(--rd-surface);border-radius:12px;padding:1rem 1.25rem;border:1px solid var(--rd-border)}.card strong{display:block;font-size:2rem;line-height:1.1;color:var(--rd-cyan)}.card span{color:var(--rd-muted);font-size:.875rem}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));grid-gap:1rem;gap:1rem}.pc-card{background:var(--rd-surface);border:1px solid var(--rd-border);border-radius:12px;padding:1rem}.pc-card h3{margin:0 0 .5rem;font-size:1rem}.pc-meta{font-size:.82rem;color:var(--rd-muted);margin-bottom:.75rem}.badge{display:inline-block;padding:.15rem .5rem;border-radius:999px;font-size:.75rem;font-weight:700}.badge.online{background:rgba(0,209,255,.15);color:var(--rd-cyan)}.badge.offline{background:#1a1a1a;color:var(--rd-muted)}.btn-connect{display:block;width:100%;text-align:center;padding:.55rem;border-radius:8px;background:var(--rd-cyan);color:#0a0a0a;font-weight:700;text-decoration:none;border:none;cursor:pointer}.btn-connect.disabled{opacity:.35;pointer-events:none}.btn-row{display:flex;gap:8px;margin-top:8px;flex-wrap:wrap}.invite-panel{background:var(--rd-surface);border:1px solid var(--rd-border);border-radius:12px;padding:1.5rem;max-width:720px}.invite-result{margin-top:1.5rem;padding-top:1rem;border-top:1px solid var(--rd-border)}.form-grid{display:grid;grid-gap:1rem;gap:1rem;grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}.form-grid label{display:flex;flex-direction:column;gap:6px;font-size:.85rem;color:var(--rd-muted)}.form-grid input{background:#0a0a0a;border:1px solid var(--rd-border);border-radius:8px;color:#fff;padding:.5rem .65rem;font-size:.95rem}.mono-block{display:block;font-size:.85rem;word-break:break-all}.mono-block,.mono-textarea{background:#0a0a0a;border:1px solid var(--rd-border);border-radius:8px;padding:.75rem}.mono-textarea{width:100%;color:#cbd5e1;font-family:ui-monospace,monospace;font-size:.72rem}.enroll-page{max-width:560px;margin:3rem auto;padding:1rem}.enroll-card{background:var(--rd-surface);border:1px solid var(--rd-border);border-radius:16px;padding:2rem}.enroll-steps{margin:1.25rem 0 0;padding-left:1.2rem;color:var(--rd-muted);line-height:1.8}.enroll-hero{background:rgba(0,209,255,.06);border:1px solid rgba(0,209,255,.25);border-radius:12px;padding:1.25rem;margin-top:1rem}.enroll-install-btn{width:100%;font-size:1.05rem;padding:.85rem 1rem}.btn-ghost{background:#1a1a1a;border:1px solid var(--rd-border);padding:.35rem .65rem;border-radius:8px;font-size:.8rem;cursor:pointer}.btn-ghost,.hint{color:var(--rd-muted)}.hint{font-size:.875rem}.error{background:#450a0a;border:1px solid #7f1d1d;padding:1rem;border-radius:8px;margin:1rem 0}.topbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem}@media (max-width:768px){.shell{grid-template-columns:1fr}.sidebar{border-right:none;border-bottom:1px solid var(--rd-border)}}