*,:before,:after{box-sizing:border-box}html,body{margin:0;padding:0}body{color:#1a1a1c;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:#f7f6f1;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;line-height:1.55}a{color:inherit;text-decoration:none}button{cursor:pointer;font-family:inherit}input,textarea,select{font-family:inherit}code,pre{font-family:ui-monospace,JetBrains Mono,SFMono-Regular,Menlo,Consolas,monospace}:root{--paper:#f7f6f1;--paper-2:#fbfaf5;--surface:#fff;--ink:#1a1a1c;--ink-2:#3a3a3f;--muted:#6a6a72;--line:#e6e2d6;--line-strong:#d6d1c2;--accent:#b1431a;--accent-2:#8a3214;--accent-soft:#fdf1e8;--link:#1d4ed8;--code-bg:#f1efe6;--ok:#166534;--err:#9f1239;--shadow-sm:0 1px 2px #14120c0f;--shadow-md:0 10px 30px -16px #14120c2e, 0 1px 2px #14120c0a;--radius-sm:6px;--radius-md:10px;--radius-lg:14px}.surface-root{min-height:100vh}.lx-root{background:var(--paper);min-height:100vh;color:var(--ink)}.lx-nav{border-bottom:1px solid var(--line);-webkit-backdrop-filter:saturate(140%)blur(6px);backdrop-filter:saturate(140%)blur(6px);z-index:20;background:#f7f6f1eb;justify-content:space-between;align-items:center;gap:16px;padding:18px 32px;display:flex;position:sticky;top:0}.lx-brand{letter-spacing:-.01em;align-items:center;gap:10px;font-weight:600;display:inline-flex}.lx-brand-mark{color:#f7f6f1;background:linear-gradient(#2a2a2e,#0f0f12);border-radius:8px;justify-content:center;align-items:center;width:30px;height:30px;font-family:Source Serif Pro,Georgia,Iowan Old Style,serif;font-size:18px;font-weight:700;line-height:1;display:inline-flex}.lx-brand-mark-sm{border-radius:6px;width:24px;height:24px;font-size:14px}.lx-brand-name{font-size:17px}.lx-nav-links{align-items:center;gap:22px;display:flex}.lx-nav-link{color:var(--ink-2);font-size:14px;font-weight:500}.lx-nav-link:hover{color:var(--ink)}.lx-btn{border-radius:var(--radius-md);text-align:center;white-space:nowrap;border:1px solid #0000;justify-content:center;align-items:center;gap:8px;padding:12px 18px;font-size:15px;font-weight:600;transition:background-color .12s,border-color .12s,color .12s,transform 80ms;display:inline-flex}.lx-btn:disabled{opacity:.55;cursor:not-allowed}.lx-btn:active:not(:disabled){transform:translateY(1px)}.lx-btn-sm{border-radius:8px;padding:8px 12px;font-size:13px}.lx-btn-block{width:100%}.lx-btn-primary{background:var(--ink);color:#fafaf6;border-color:var(--ink)}.lx-btn-primary:hover:not(:disabled){background:#000;border-color:#000}.lx-btn-ghost{color:var(--ink);border-color:var(--line-strong);background:0 0}.lx-btn-ghost:hover:not(:disabled){background:var(--paper-2);border-color:var(--ink-2)}.lx-hero{grid-template-columns:1.05fr 1fr;align-items:center;gap:56px;max-width:1200px;margin:0 auto;padding:72px 32px 56px;display:grid}.lx-eyebrow{letter-spacing:.12em;text-transform:uppercase;color:var(--accent-2);background:var(--accent-soft);border:1px solid #f1d6c2;border-radius:999px;margin-bottom:18px;padding:5px 10px;font-size:12px;display:inline-block}.lx-h1{letter-spacing:-.02em;color:var(--ink);margin:0 0 18px;font-family:Source Serif Pro,Georgia,Iowan Old Style,serif;font-size:clamp(34px,4.8vw,56px);font-weight:600;line-height:1.06}.lx-h1-accent{color:var(--accent)}.lx-lede{color:var(--ink-2);max-width:560px;margin:0 0 26px;font-size:17px;line-height:1.6}.lx-cta-row{flex-wrap:wrap;gap:12px;margin-bottom:24px;display:flex}.lx-hero-checks{color:var(--ink-2);gap:8px;margin:0;padding:0;font-size:14.5px;list-style:none;display:grid}.lx-hero-checks li{padding-left:22px;position:relative}.lx-hero-checks li:before{content:"";border-left:2px solid var(--accent);border-bottom:2px solid var(--accent);width:12px;height:6px;position:absolute;top:8px;left:0;transform:rotate(-45deg)}.lx-preview{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);overflow:hidden}.lx-preview-tabs{border-bottom:1px solid var(--line);background:linear-gradient(#f3f1e8,#fbfaf5);gap:4px;padding:10px 14px 0;display:flex}.lx-tab{color:var(--muted);border:1px solid #0000;border-bottom:none;border-radius:8px 8px 0 0;align-items:center;padding:8px 14px;font-family:ui-monospace,Menlo,monospace;font-size:12.5px;display:inline-flex}.lx-tab-active{background:var(--surface);color:var(--ink);border-color:var(--line);position:relative;top:1px}.lx-preview-body{grid-template-columns:1fr 1fr;display:grid}.lx-preview-col{border-right:1px solid var(--line);padding:18px 20px 22px}.lx-preview-col:last-child{background:#fbfaf5;border-right:none}.lx-preview-label{letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin-bottom:10px;font-size:11px}.lx-pre{white-space:pre-wrap;word-break:break-word;color:var(--ink-2);margin:0;font-size:12.5px;line-height:1.55}.lx-pre-notes{color:#4a4a52}.lx-pre-tex{color:#1f2937}.lx-tex-kw{color:var(--accent);font-weight:600}.lx-tex-math{color:#1d4ed8}.lx-preview-foot{color:var(--muted);border-top:1px solid var(--line);background:#fbfaf5;align-items:center;gap:8px;width:100%;padding:10px 16px;font-size:12px;display:inline-flex}.lx-dot{background:var(--accent);border-radius:50%;width:6px;height:6px;display:inline-block}.lx-section{max-width:1100px;margin:0 auto;padding:72px 32px}.lx-section-alt{background:var(--paper-2);max-width:none}.lx-section-alt>*{max-width:1100px;margin-left:auto;margin-right:auto}.lx-h2{letter-spacing:-.015em;margin:0 0 12px;font-family:Source Serif Pro,Georgia,Iowan Old Style,serif;font-size:clamp(26px,3vw,36px);font-weight:600}.lx-section-lede{color:var(--ink-2);max-width:640px;margin:0 0 36px;font-size:16px}.lx-feature-grid{grid-template-columns:repeat(4,1fr);gap:18px;display:grid}.lx-feature{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);padding:22px 20px;transition:border-color .14s,transform .14s}.lx-feature:hover{border-color:var(--line-strong);transform:translateY(-2px)}.lx-feature-icon{background:var(--accent-soft);color:var(--accent-2);border:1px solid #f1d6c2;border-radius:8px;justify-content:center;align-items:center;margin-bottom:12px;padding:6px 10px;font-family:ui-monospace,Menlo,monospace;font-size:14px;font-weight:600;display:inline-flex}.lx-feature-title{margin:0 0 6px;font-size:16px;font-weight:600}.lx-feature-body{color:var(--ink-2);margin:0;font-size:14.5px;line-height:1.55}.lx-steps{grid-template-columns:repeat(3,1fr);gap:24px;margin:0;padding:0;list-style:none;display:grid}.lx-step{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);padding:22px 20px}.lx-step-num{background:var(--ink);color:#fafaf6;border-radius:999px;justify-content:center;align-items:center;width:28px;height:28px;margin-bottom:12px;font-family:Source Serif Pro,Georgia,serif;font-size:14px;font-weight:600;display:inline-flex}.lx-step-title{margin:0 0 6px;font-size:16px;font-weight:600}.lx-step-body{color:var(--ink-2);margin:0;font-size:14.5px}.lx-pricing-grid{grid-template-columns:1fr 1fr;gap:18px;max-width:820px;display:grid}.lx-plan{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);flex-direction:column;gap:18px;padding:26px 24px;display:flex}.lx-plan-featured{border-color:var(--ink);box-shadow:var(--shadow-md);position:relative}.lx-plan-head{gap:6px;display:grid}.lx-plan-badge{letter-spacing:.1em;text-transform:uppercase;background:var(--ink);color:#fafaf6;border-radius:999px;align-self:flex-start;margin-bottom:4px;padding:4px 8px;font-size:11px}.lx-plan-name{margin:0;font-family:Source Serif Pro,Georgia,serif;font-size:22px;font-weight:600}.lx-plan-price{display:baseline}.lx-plan-amount{letter-spacing:-.02em;font-family:Source Serif Pro,Georgia,serif;font-size:34px;font-weight:600}.lx-plan-period{color:var(--muted);margin-left:4px;font-size:14px}.lx-plan-tag{color:var(--ink-2);margin:0;font-size:14px}.lx-plan-list{color:var(--ink-2);gap:8px;margin:0;padding:0;font-size:14.5px;list-style:none;display:grid}.lx-plan-list li{padding-left:22px;position:relative}.lx-plan-list li:before{content:"";border-left:2px solid var(--accent);border-bottom:2px solid var(--accent);width:10px;height:5px;position:absolute;top:8px;left:0;transform:rotate(-45deg)}.lx-faq-list{gap:12px;max-width:760px;display:grid}.lx-faq-item{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-md);padding:14px 18px}.lx-faq-item>summary{cursor:pointer;justify-content:space-between;align-items:center;gap:12px;font-size:15px;font-weight:600;list-style:none;display:flex}.lx-faq-item>summary:after{content:"+";color:var(--muted);font-size:18px;line-height:1}.lx-faq-item[open]>summary:after{content:"−"}.lx-faq-item>p{color:var(--ink-2);margin:10px 0 0;font-size:14.5px;line-height:1.6}.lx-cta-band{color:#f5f3eb;background:linear-gradient(#1a1a1c,#0f0f12);padding:72px 32px}.lx-cta-band-inner{text-align:center;max-width:760px;margin:0 auto}.lx-cta-band-title{color:#f5f3eb}.lx-cta-band-title .lx-code{color:#f5f3eb;background:#ffffff14;border-color:#ffffff1f}.lx-cta-band-lede{color:#cbc8bd;margin:0 0 24px}.lx-cta-band .lx-cta-row{justify-content:center}.lx-cta-band .lx-btn-ghost{color:#f5f3eb;border-color:#ffffff40}.lx-cta-band .lx-btn-ghost:hover{background:#ffffff0f}.lx-cta-band .lx-btn-primary{background:var(--accent);border-color:var(--accent)}.lx-cta-band .lx-btn-primary:hover{background:var(--accent-2);border-color:var(--accent-2)}.lx-code{background:var(--code-bg);border:1px solid var(--line);border-radius:5px;padding:1px 6px;font-family:ui-monospace,Menlo,monospace;font-size:.9em}.lx-foot{border-top:1px solid var(--line);background:var(--paper-2);justify-content:space-between;align-items:center;gap:16px;padding:24px 32px;display:flex}.lx-foot-left{align-items:center;gap:8px;font-weight:600;display:inline-flex}.lx-foot-name{font-size:14px}.lx-foot-links{gap:18px;display:flex}.lx-foot-link{color:var(--muted);font-size:13.5px}.lx-foot-link:hover{color:var(--ink)}.lx-auth{grid-template-columns:1.05fr 1fr;gap:36px;max-width:1080px;margin:0 auto;padding:64px 32px;display:grid}.lx-auth-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);padding:32px}.lx-auth-title{letter-spacing:-.015em;margin:0 0 6px;font-family:Source Serif Pro,Georgia,serif;font-size:28px;font-weight:600}.lx-auth-lede{color:var(--ink-2);margin:0 0 22px}.lx-auth-form{gap:14px;display:grid}.lx-auth-divider{color:var(--muted);text-transform:uppercase;letter-spacing:.1em;align-items:center;gap:12px;margin:18px 0;font-size:12px;display:flex}.lx-auth-divider:before,.lx-auth-divider:after{content:"";border-top:1px solid var(--line);flex:1}.lx-auth-side{align-content:start;gap:14px;display:grid}.lx-auth-side-title{margin:0;font-family:Source Serif Pro,Georgia,serif;font-size:22px;font-weight:600}.lx-auth-side-lede{color:var(--ink-2);margin:0 0 4px;font-size:14.5px}.lx-plan-mini{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);gap:12px;padding:18px 20px;display:grid}.lx-plan-mini-featured{border-color:var(--ink)}.lx-plan-mini-head{justify-content:space-between;align-items:baseline;display:flex}.lx-plan-mini-name{margin:0;font-size:16px;font-weight:600}.lx-plan-mini-price{font-family:Source Serif Pro,Georgia,serif;font-size:22px;font-weight:600}.lx-plan-mini-period{color:var(--muted);margin-left:2px;font-size:12px}.lx-plan-mini-list{color:var(--ink-2);gap:6px;margin:0;padding:0;font-size:14px;list-style:none;display:grid}.lx-plan-mini-list li{padding-left:18px;position:relative}.lx-plan-mini-list li:before{content:"";border-left:2px solid var(--accent);border-bottom:2px solid var(--accent);width:8px;height:4px;position:absolute;top:7px;left:0;transform:rotate(-45deg)}.lx-plan-mini-foot{color:var(--muted);margin:0;font-size:12.5px}.lx-field{gap:6px;display:grid}.lx-field-label{color:var(--ink-2);letter-spacing:.02em;font-size:12px;font-weight:600}.lx-input,.lx-textarea{border:1px solid var(--line-strong);background:var(--surface);border-radius:var(--radius-md);width:100%;color:var(--ink);padding:11px 12px;font-size:15px;transition:border-color .12s,box-shadow .12s}.lx-input:focus,.lx-textarea:focus{border-color:var(--ink);outline:none;box-shadow:0 0 0 3px #1a1a1c14}.lx-textarea{resize:vertical;min-height:180px;font-family:ui-monospace,Menlo,monospace;font-size:13.5px;line-height:1.55}.lx-form-msg{margin:6px 0 0;font-size:13.5px}.lx-form-msg-ok{color:var(--ok)}.lx-form-msg-error{color:var(--err)}.lx-app{max-width:1280px;margin:0 auto;padding:36px 32px 56px}.lx-app-head{margin-bottom:22px}.lx-app-title{letter-spacing:-.015em;margin:0 0 6px;font-family:Source Serif Pro,Georgia,serif;font-size:clamp(26px,3vw,34px);font-weight:600}.lx-app-lede{color:var(--ink-2);max-width:720px;margin:0;font-size:15px}.lx-app-grid{grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);align-items:start;gap:22px;display:grid}.lx-panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);gap:16px;padding:22px;display:grid}.lx-panel-head{justify-content:space-between;align-items:center;gap:10px;display:flex}.lx-panel-title{margin:0;font-family:Source Serif Pro,Georgia,serif;font-size:18px;font-weight:600}.lx-counter{color:var(--muted);font-family:ui-monospace,Menlo,monospace;font-size:12px}.lx-counter-ok{color:var(--ok)}.lx-row{gap:14px;display:grid}.lx-row-2{grid-template-columns:1fr 1fr}.lx-fieldset{border:none;gap:8px;margin:0;padding:0;display:grid}.lx-style-row{grid-template-columns:repeat(3,1fr);gap:10px;display:grid}.lx-style{border:1px solid var(--line-strong);border-radius:var(--radius-md);cursor:pointer;background:var(--paper-2);gap:4px;padding:12px 14px;transition:border-color .12s,background-color .12s;display:grid}.lx-style:hover{border-color:var(--ink-2)}.lx-style-active{border-color:var(--ink);background:var(--surface);box-shadow:0 0 0 3px #1a1a1c0f}.lx-style-input{opacity:0;pointer-events:none;position:absolute}.lx-style-label{font-size:14px;font-weight:600}.lx-style-hint{color:var(--muted);font-size:12px}.lx-actions{flex-wrap:wrap;align-items:center;gap:14px;display:flex}.lx-actions-hint{color:var(--muted);font-size:12.5px}.lx-empty{border:1px dashed var(--line-strong);border-radius:var(--radius-md);text-align:center;background:var(--paper-2);justify-items:center;gap:8px;padding:36px 22px;display:grid}.lx-empty-mark{color:var(--accent);background:var(--accent-soft);border:1px solid #f1d6c2;border-radius:8px;margin-bottom:4px;padding:6px 12px;font-family:ui-monospace,Menlo,monospace;font-size:22px}.lx-empty-title{margin:0;font-size:15px;font-weight:600}.lx-empty-body{color:var(--ink-2);max-width:380px;margin:0;font-size:14px}.lx-spinner{border:2px solid var(--line);border-top-color:var(--ink);border-radius:50%;width:22px;height:22px;margin-bottom:6px;animation:.9s linear infinite lx-spin}@keyframes lx-spin{to{transform:rotate(360deg)}}.lx-result{gap:16px;display:grid}.lx-result-meta{color:var(--ink-2);flex-wrap:wrap;gap:14px;font-size:13.5px;display:flex}.lx-result-meta-item strong{color:var(--ink)}.lx-result-summary{color:var(--ink-2);background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius-md);margin:0;padding:12px 14px;font-size:14.5px;line-height:1.55}.lx-result-block{gap:8px;display:grid}.lx-result-block-title{text-transform:uppercase;letter-spacing:.1em;color:var(--muted);margin:0;font-size:13px;font-weight:600}.lx-result-sections{color:var(--ink-2);gap:4px;margin:0;padding-left:22px;font-size:14px;display:grid}.lx-tex-output{color:#f3efe2;border-radius:var(--radius-md);white-space:pre-wrap;word-break:break-word;background:#0f0f12;max-height:480px;margin:0;padding:16px 18px;font-size:12.5px;line-height:1.55;overflow-x:auto}.lx-tex-output code{font-family:inherit}.lx-result-hint{color:var(--muted);margin:0;font-size:12.5px}.lx-corrections{gap:10px;margin:0;padding:0;list-style:none;display:grid}.lx-correction{border:1px solid var(--line);border-radius:var(--radius-md);background:var(--paper-2);padding:10px 12px}.lx-correction-diff{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.lx-correction-arrow{color:var(--muted)}.lx-code-before{color:#82231b;background:#fff3f0;border-color:#f3c8be}.lx-code-after{color:#14532d;background:#ecfaf2;border-color:#b9e3cb}.lx-correction-reason{color:var(--ink-2);margin:6px 0 0;font-size:13px}@media (max-width:960px){.lx-hero{grid-template-columns:1fr;gap:32px;padding:48px 22px 36px}.lx-feature-grid{grid-template-columns:repeat(2,1fr)}.lx-steps,.lx-pricing-grid{grid-template-columns:1fr}.lx-auth{grid-template-columns:1fr;padding:40px 22px}.lx-app-grid{grid-template-columns:1fr}.lx-section{padding:56px 22px}}@media (max-width:640px){.lx-nav{padding:14px 18px}.lx-nav-links{gap:12px}.lx-nav-link{font-size:13px}.lx-preview-body{grid-template-columns:1fr}.lx-preview-col{border-right:none;border-bottom:1px solid var(--line)}.lx-feature-grid,.lx-style-row,.lx-row-2{grid-template-columns:1fr}.lx-actions{flex-direction:column;align-items:flex-start;gap:10px}.lx-foot{text-align:center;flex-direction:column;gap:10px;padding:22px}.lx-cta-band{padding:56px 22px}.lx-app{padding:24px 18px 40px}.lx-auth-card{padding:22px}}