:root{--bg:oklch(99% .002 240);--surface:oklch(100% 0 0);--fg:oklch(18% .012 250);--muted:oklch(54% .012 250);--border:oklch(92% .005 250);--border-strong:oklch(86% .008 250);--accent:oklch(48% .2 258);--accent-fg:oklch(100% 0 0);--danger:oklch(58% .2 28);--font-display:-apple-system, BlinkMacSystemFont, "SF Pro Display", system-ui, sans-serif;--font-body:-apple-system, BlinkMacSystemFont, "SF Pro Text", system-ui, sans-serif;--font-mono:ui-monospace, "SF Mono", Menlo, Consolas, monospace;--r-sm:6px;--r-md:10px;--r-lg:14px}.vt-auth{background:var(--bg);min-height:100vh;color:var(--fg);font-family:var(--font-body);font-size:16px;line-height:1.5}.vt-auth *,.vt-auth :before,.vt-auth :after{box-sizing:border-box}.vt-auth a{color:inherit;text-decoration:none}.vt-auth :where(button){font:inherit;cursor:pointer;color:inherit;background:0 0;border:0}.vt-auth input,.vt-auth select{font:inherit;color:inherit}.shell{grid-template-columns:minmax(0,1fr) minmax(0,1fr);min-height:100vh;display:grid}@media (width<=960px){.shell{grid-template-columns:1fr}}.pane-form{background:var(--surface);flex-direction:column;padding:28px 32px 40px;display:flex}.pane-form-inner{flex-direction:column;flex:1;justify-content:center;display:flex}.form-wrap{width:100%;max-width:408px;margin:32px auto}.brand{font-family:var(--font-display);letter-spacing:-.02em;align-items:center;gap:9px;font-size:17px;font-weight:600;display:inline-flex}.brand-mark{object-fit:contain;flex-shrink:0;width:24px;height:24px;display:block}.tabs{border:1px solid var(--border);background:oklch(96% .005 250);border-radius:9px;margin-bottom:28px;padding:3px;font-size:13.5px;display:inline-flex}.tabs a{color:var(--muted);letter-spacing:-.005em;border-radius:7px;padding:7px 16px;font-weight:500;transition:all .12s}.tabs a.is-active{background:var(--surface);color:var(--fg);box-shadow:0 1px oklch(88% .008 250)}.title{font-family:var(--font-display);letter-spacing:-.025em;margin:0 0 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.btn-primary:hover{filter:brightness(1.08)}.vt-auth .btn-primary[disabled]{opacity:.5;cursor:not-allowed}.vt-auth .btn-primary svg{width:14px;height:14px}.form-footer{color:var(--muted);text-align:center;margin-top:22px;font-size:12.5px}.form-footer a{color:var(--fg);text-decoration:underline;-webkit-text-decoration-color:var(--border-strong);text-decoration-color:var(--border-strong);text-underline-offset:3px}.pane-form-meta{color:var(--muted);font-size:12.5px;font-family:var(--font-mono);justify-content:space-between;align-items:center;display:flex}.lang{border:1px solid var(--border);letter-spacing:.04em;border-radius:6px;padding:1px;font-size:11px;display:inline-flex}.lang span{color:var(--muted);border-radius:4px;padding:3px 8px}.lang span.is-active{color:var(--fg);background:oklch(96% .005 250)}.pane-preview{background:var(--bg);border-left:1px solid var(--border);flex-direction:column;justify-content:center;padding:56px 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