:root{--bg: #fbfcfd;--surface: #ffffff;--surface-2: #f4f7f8;--border: #e4e9ec;--border-strong: #d3dbdf;--ink: #0e1a24;--ink-2: #4a5b68;--ink-3: #7d8b96;--accent: #12a66b;--accent-ink: #0a7a4f;--accent-wash: #e7f7f0;--st-sent: #64748b;--st-delivered: #12a66b;--st-read: #2563eb;--st-failed: #dc2626;--st-warn: #b45309;--font-display: "Sora", system-ui, sans-serif;--font-body: "IBM Plex Sans", system-ui, sans-serif;--font-mono: "JetBrains Mono", ui-monospace, "SF Mono", monospace;--maxw: 1120px;--radius: 10px;--shadow: 0 1px 2px rgba(14, 26, 36, .04), 0 8px 24px rgba(14, 26, 36, .05)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font-body);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased}a{color:var(--accent-ink);text-decoration:none}a:hover{text-decoration:underline}h1,h2,h3,h4{font-family:var(--font-display);color:var(--ink);line-height:1.15;margin:0;letter-spacing:-.02em}code,pre,.mono{font-family:var(--font-mono)}.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}.nav{position:sticky;top:0;z-index:50;background:#fbfcfdd9;-webkit-backdrop-filter:saturate(1.4) blur(10px);backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--border)}.nav-inner{display:flex;align-items:center;gap:28px;height:60px}.brand{display:flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:800;font-size:18px;color:var(--ink);letter-spacing:-.03em}.brand:hover{text-decoration:none}.brand-mark{display:flex;gap:3px}.brand-cell{width:9px;height:13px;border-radius:2px;background:var(--border-strong)}.brand-cell.on{background:var(--accent)}.nav-links{display:flex;gap:22px;margin-left:auto;align-items:center}.nav-links a{color:var(--ink-2);font-weight:500;font-size:15px}.nav-links a:hover{color:var(--ink);text-decoration:none}.nav-links a.active{color:var(--accent-ink)}.nav-cta{background:var(--ink);color:#fff!important;padding:7px 14px;border-radius:8px;font-size:14px;font-weight:600}.nav-cta:hover{background:#23323d;text-decoration:none}.nav-toggle{display:none}.hero{padding:88px 0 64px;position:relative;overflow:hidden}.hero-eyebrow{font-family:var(--font-mono);font-size:13px;color:var(--accent-ink);letter-spacing:.02em;margin-bottom:20px;display:inline-flex;align-items:center;gap:8px}.hero-eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px var(--accent-wash)}.hero h1{font-size:clamp(38px,6vw,62px);font-weight:800;max-width:16ch}.hero h1 .g{color:var(--accent-ink)}.hero p.lede{font-size:clamp(17px,2.4vw,21px);color:var(--ink-2);max-width:52ch;margin:22px 0 32px}.hero-cta{display:flex;gap:12px;flex-wrap:wrap;align-items:center}.btn{display:inline-flex;align-items:center;gap:8px;font-weight:600;font-size:15px;padding:11px 20px;border-radius:9px;cursor:pointer;border:1px solid transparent;transition:transform .12s ease,background .15s ease}.btn:hover{text-decoration:none}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-ink)}.btn-ghost{background:var(--surface);color:var(--ink);border-color:var(--border-strong)}.btn-ghost:hover{border-color:var(--ink-3)}.hero-otp{margin-top:56px;display:flex;align-items:center;gap:20px;flex-wrap:wrap}.otp-cells{display:flex;gap:10px}.otp-cell{width:52px;height:66px;border-radius:10px;border:1.5px solid var(--border-strong);background:var(--surface);display:grid;place-items:center;font-family:var(--font-mono);font-weight:700;font-size:30px;color:var(--ink);box-shadow:var(--shadow);animation:cellIn .5s cubic-bezier(.2,.7,.2,1) both}.otp-cell.lit{border-color:var(--accent);color:var(--accent-ink)}.otp-caption{font-family:var(--font-mono);font-size:13px;color:var(--ink-3)}.otp-caption b{color:var(--st-delivered);font-weight:700}@keyframes cellIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.section{padding:64px 0}.section-head{max-width:60ch;margin-bottom:40px}.section-eyebrow{font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3);margin-bottom:12px}.section h2{font-size:clamp(26px,4vw,34px);font-weight:700}.section .sub{color:var(--ink-2);font-size:17px;margin-top:12px}.features{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.feature{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px}.feature h3{font-size:17px;font-weight:600;margin-bottom:8px;display:flex;align-items:center;gap:9px}.feature p{color:var(--ink-2);font-size:14.5px;margin:0}.feature .fi{width:8px;height:8px;border-radius:2px;background:var(--accent)}.insight{background:var(--ink);color:#eaf1f5;border-radius:16px;padding:40px;display:grid;grid-template-columns:1.1fr 1fr;gap:36px;align-items:center}.insight h2{color:#fff;font-size:27px}.insight p{color:#b6c4ce;margin:14px 0 0}.insight .diagram{font-family:var(--font-mono);font-size:13.5px;background:#0a141b;border:1px solid #1e2c36;border-radius:12px;padding:20px;color:#cdd9e1;line-height:1.9}.insight .diagram .k{color:#6ee7b7}.insight .diagram .mark{color:#fbbf24}.code{position:relative;background:#0c151c;border:1px solid #1b2831;border-radius:12px;overflow:hidden}.code-bar{display:flex;align-items:center;gap:8px;padding:10px 14px;border-bottom:1px solid #1b2831}.code-bar .fn{font-family:var(--font-mono);font-size:12.5px;color:#7d93a1;margin-right:auto}.code-copy{font-family:var(--font-body);font-size:12px;color:#9fb2be;background:#16232c;border:1px solid #223440;border-radius:6px;padding:4px 9px;cursor:pointer}.code-copy:hover{color:#fff;border-color:#35505f}.code pre{margin:0;padding:18px;overflow-x:auto;font-size:13.5px;line-height:1.7;color:#d5e2ea}.code.inline-cmd pre{color:#d5e2ea}.code .p{color:#6ee7b7}.docs{display:grid;grid-template-columns:236px 1fr;gap:44px;align-items:start;padding:40px 0 80px}.sidebar{position:sticky;top:76px}.sidebar-group{margin-bottom:22px}.sidebar-group h4{font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3);margin-bottom:10px}.sidebar a{display:block;color:var(--ink-2);font-size:14.5px;padding:5px 10px;border-radius:7px;border-left:2px solid transparent}.sidebar a:hover{color:var(--ink);text-decoration:none;background:var(--surface-2)}.sidebar a.active{color:var(--accent-ink);border-left-color:var(--accent);background:var(--accent-wash);font-weight:600}.doc-content{min-width:0;max-width:760px}.doc-content h1{font-size:36px;margin-bottom:10px}.doc-content h2{font-size:24px;margin:44px 0 14px;padding-top:8px}.doc-content h3{font-size:18px;margin:28px 0 10px}.doc-content p{color:var(--ink-2);margin:12px 0}.doc-content ul{color:var(--ink-2);padding-left:20px}.doc-content li{margin:6px 0}.doc-content .code{margin:16px 0}.doc-content code:not(pre code){background:var(--surface-2);border:1px solid var(--border);padding:1px 6px;border-radius:5px;font-size:13px;color:var(--accent-ink)}.lede-block{font-size:18px;color:var(--ink-2)}.callout{border-radius:10px;padding:16px 18px;margin:18px 0;font-size:14.5px;border:1px solid;display:flex;gap:12px}.callout .tag{font-family:var(--font-mono);font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.05em;padding-top:2px}.callout.tip{background:var(--accent-wash);border-color:#bfe8d6;color:#0a5c3d}.callout.warn{background:#fff7ed;border-color:#fed7aa;color:#9a3412}.callout p{margin:0;color:inherit}.tpl-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.tpl-card{background:var(--surface);border:1px solid var(--border);border-radius:12px;overflow:hidden;display:flex;flex-direction:column}.tpl-head{padding:16px 18px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between}.tpl-head h3{font-size:16px;font-family:var(--font-mono);font-weight:500}.tpl-badge{font-size:11px;font-family:var(--font-mono);padding:3px 8px;border-radius:20px;background:var(--accent-wash);color:var(--accent-ink)}.tpl-card .code{border-radius:0;border:0}.tpl-actions{padding:12px 18px;display:flex;gap:10px}.pg{display:grid;grid-template-columns:340px 1fr;gap:28px;align-items:start;padding:36px 0 80px}.pg-panel{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:22px;position:sticky;top:76px}.pg-panel h3{font-size:15px;margin-bottom:16px}.field{margin-bottom:16px}.field label{display:block;font-size:13px;font-weight:600;color:var(--ink);margin-bottom:6px}.field input[type=text],.field input[type=number],.field select{width:100%;font-family:var(--font-body);font-size:14px;color:var(--ink);padding:9px 11px;border:1px solid var(--border-strong);border-radius:8px;background:var(--surface)}.field input:focus,.field select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-wash)}.field.check{display:flex;align-items:center;gap:9px}.field.check label{margin:0}.field.check input{width:16px;height:16px;accent-color:var(--accent)}.pg-out{display:flex;flex-direction:column;gap:18px;min-width:0}.pg-status{display:flex;align-items:center;gap:10px;font-family:var(--font-mono);font-size:14px;font-weight:700;padding:12px 16px;border-radius:10px}.pg-status.ok{background:var(--accent-wash);color:var(--accent-ink)}.pg-status.bad{background:#fef2f2;color:var(--st-failed)}.issues{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:8px}.issue{display:flex;gap:10px;align-items:baseline;font-size:13.5px;padding:10px 12px;border-radius:8px;border:1px solid var(--border);background:var(--surface)}.issue .lvl{font-family:var(--font-mono);font-size:10px;font-weight:700;text-transform:uppercase;padding:2px 7px;border-radius:20px;flex-shrink:0}.issue.error .lvl{background:#fef2f2;color:var(--st-failed)}.issue.warning .lvl{background:#fff7ed;color:var(--st-warn)}.issue .cd{font-family:var(--font-mono);color:var(--ink);font-weight:600}.issue .ms{color:var(--ink-2)}.pg-tabs{display:flex;gap:4px}.pg-tab{font-family:var(--font-mono);font-size:12.5px;padding:6px 12px;border-radius:7px;cursor:pointer;color:var(--ink-2);background:transparent;border:1px solid transparent}.pg-tab.active{background:var(--surface);border-color:var(--border);color:var(--ink);font-weight:600}.footer{border-top:1px solid var(--border);padding:40px 0;margin-top:40px;color:var(--ink-3);font-size:14px}.footer-inner{display:flex;align-items:center;gap:16px;flex-wrap:wrap}.footer a{color:var(--ink-2)}.footer .sep{margin-left:auto}.chips{display:flex;gap:8px;flex-wrap:wrap}.chip{font-family:var(--font-mono);font-size:12px;padding:4px 10px;border-radius:20px;border:1px solid var(--border);display:inline-flex;align-items:center;gap:6px}.chip .d{width:7px;height:7px;border-radius:50%}.chip.sent .d{background:var(--st-sent)}.chip.delivered .d{background:var(--st-delivered)}.chip.read .d{background:var(--st-read)}.chip.failed .d{background:var(--st-failed)}@media (max-width: 900px){.features{grid-template-columns:1fr 1fr}.insight,.docs{grid-template-columns:1fr}.sidebar{position:static;display:none}.pg{grid-template-columns:1fr}.pg-panel{position:static}.tpl-grid{grid-template-columns:1fr}}@media (max-width: 640px){.features{grid-template-columns:1fr}.nav-links{display:none}.nav-links.open{display:flex;position:absolute;top:60px;left:0;right:0;flex-direction:column;background:var(--surface);border-bottom:1px solid var(--border);padding:16px 24px;gap:14px}.nav-toggle{display:block;margin-left:auto;background:none;border:1px solid var(--border-strong);border-radius:8px;padding:6px 10px;cursor:pointer;font-size:18px}.hero{padding:56px 0 40px}.otp-cell{width:44px;height:56px;font-size:25px}}@media (prefers-reduced-motion: reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}