:root {
    color-scheme: light;
    --ink: #122a2a;
    --muted: #526260;
    --green: #a9e8a9;
    --green-strong: #155743;
    --line: #dce5df;
    --soft: #f4f8f4;
    --white: #fff;
    --error: #a32a2a;
    --radius: 14px;
    font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-synthesis: none;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--white); color: var(--ink); font-size: 16px; line-height: 1.65; }
img { max-width: 100%; }
button, input, textarea, select { font: inherit; }
a { color: inherit; }
button, a, input, textarea, select { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }
[hidden] { display: none !important; }
.tracking-frame { display: none; visibility: hidden; border: 0; }
:focus-visible { outline: 3px solid #397b5d; outline-offset: 4px; }
::selection { background: #cef0ce; color: var(--ink); }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { font-weight: 650; line-height: 1.12; letter-spacing: -.035em; }
h1 { font-size: clamp(40px, 5vw, 68px); }
h2 { font-size: clamp(28px, 3vw, 40px); }
h3 { font-size: 23px; }
p { margin-bottom: 20px; }
.page-width { width: min(1160px, calc(100% - 80px)); margin-inline: auto; }
.skip-link { position: fixed; top: -100px; left: 20px; z-index: 100; padding: 10px 18px; background: var(--ink); color: white; border-radius: 8px; }
.skip-link:focus { top: 10px; }
.site-header { min-height: 105px; width: min(1240px, calc(100% - 80px)); margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 32px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 700; letter-spacing: -.045em; font-size: 23px; white-space: nowrap; }
.brand img { display: block; flex-shrink: 0; border-radius: 9px; }
.header-nav { display: flex; align-items: center; gap: 30px; font-size: 14px; font-weight: 550; }
.header-nav > a:not(.button), .quiet-link { text-decoration: none; }
.header-nav > a:not(.button):hover, .header-nav [aria-current], .quiet-link:hover { text-decoration: underline; text-underline-offset: 5px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 50px; padding: 13px 24px; border: 1px solid var(--ink); border-radius: 8px; color: var(--white); background: var(--ink); text-decoration: none; font-size: 15px; font-weight: 600; line-height: 1.4; letter-spacing: -.01em; transition: background 150ms ease, transform 150ms ease; }
.button:hover { background: #234a40; }
.button:active { transform: translateY(1px); }
.button:disabled { cursor: not-allowed; opacity: .5; transform: none; }
.button-small { min-height: 42px; padding: 10px 18px; font-size: 14px; }
.button-large { min-height: 56px; padding: 16px 25px; }
.button-secondary { background: white; color: var(--ink); border-color: var(--line); }
.button-secondary:hover { background: var(--soft); }
.hero { padding: 78px 0 96px; display: grid; grid-template-columns: 1.2fr 1fr; align-items: center; gap: 90px; }
.hero h1 { font-size: clamp(48px, 5.2vw, 74px); letter-spacing: -.065em; line-height: 1.05; max-width: 620px; margin-bottom: 28px; }
.hero-lede { max-width: 460px; font-size: 18px; line-height: 1.75; color: var(--muted); margin-bottom: 30px; }
.hero-note { color: var(--muted); font-size: 13px; margin-top: 15px; margin-bottom: 0; }
.handoff-visual { background: var(--ink); color: white; padding: 28px; border-radius: 20px; width: 100%; max-width: 420px; justify-self: end; box-shadow: 0 18px 48px #142c2a0f; }
.visual-line { display: flex; align-items: center; gap: 9px; font-size: 9px; font-weight: 600; letter-spacing: .12em; color: #d3dfdb; }
.visual-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--green); }
.visual-number { margin-left: auto; color: #90a29a; }
.visual-message { margin-top: 26px; padding: 20px 22px; border-radius: 9px; background: #fff; color: var(--ink); }
.visual-message > span:first-child { display: block; margin-bottom: 16px; font-size: 12px; font-weight: 650; }
.message-stroke { display: block; height: 6px; border-radius: 4px; background: #dfe9e2; margin-top: 9px; }
.stroke-long { width: 83%; }.stroke-short { width: 56%; }
.visual-transfer { display: flex; gap: 10px; align-items: center; margin: 21px 0; }
.visual-transfer > span { height: 1px; background: #44615a; flex: 1; }
.visual-transfer p { font-size: 10px; color: #c1d2c9; margin: 0; }
.visual-cipher { border: 1px solid #527067; padding: 22px; border-radius: 9px; display: flex; flex-direction: column; gap: 15px; }
.cipher-text { font: 20px/1.7 ui-monospace, "SFMono-Regular", Consolas, monospace; color: var(--green); letter-spacing: .12em; }
.cipher-label { font-size: 11px; color: #c1d2c9; }
.visual-bottom { margin-top: 23px; display: flex; justify-content: space-between; align-items: center; font-size: 9px; font-weight: 650; letter-spacing: .12em; color: #d3dfdb; }
.visual-check { font-size: 19px; font-weight: 500; color: var(--green); line-height: 1; }
.workflow { border-top: 1px solid var(--line); padding: 74px 0 86px; }
.section-heading { display: flex; justify-content: space-between; align-items: flex-start; gap: 60px; margin-bottom: 48px; }
.section-heading h2 { margin: 0; }.section-heading > p { max-width: 385px; color: var(--muted); margin-bottom: 0; padding-top: 6px; }
.step-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 50px; list-style: none; padding: 0; margin: 0; }
.step-number { color: var(--green-strong); font-size: 13px; display: inline-block; border-bottom: 1px solid #97c9a7; padding-bottom: 8px; width: 35px; margin-bottom: 23px; }
.step-list h3 { margin-bottom: 13px; }.step-list p { color: var(--muted); font-size: 15px; margin: 0; }
.use-cases { padding: 70px 0 80px; border-top: 1px solid var(--line); display: grid; grid-template-columns: 1.1fr 1fr; gap: 110px; }
.use-cases p { color: var(--muted); max-width: 450px; }.use-case-detail h3 { font-size: 19px; margin-bottom: 12px; }.use-case-detail p { font-size: 15px; }.use-case-detail h3:not(:first-child) { margin-top: 30px; }
.text-link { font-size: 14px; font-weight: 600; text-underline-offset: 5px; text-decoration-thickness: 1px; display: inline-block; }.text-link:hover { color: var(--green-strong); }.text-link span { margin-left: 8px; }
.ad-region { min-height: 0; margin-block: 12px; overflow: hidden; }
.ad-region:has(ins) { margin-block: 28px; }
.closing-cta { background: var(--soft); border-radius: var(--radius); padding: 42px 46px; display: flex; align-items: center; justify-content: space-between; gap: 35px; margin-top: 20px; margin-bottom: 50px; }
.closing-cta h2 { font-size: 29px; margin-bottom: 10px; }.closing-cta p { color: var(--muted); font-size: 14px; margin: 0; }.closing-cta .button { flex-shrink: 0; }
.site-footer { border-top: 1px solid var(--line); padding: 34px 0 30px; }.footer-top { display: flex; justify-content: space-between; align-items: center; gap: 20px; }.footer-top .brand { font-size: 20px; }.footer-top p { color: var(--muted); font-size: 13px; margin: 0; }.footer-nav { display: flex; gap: 25px; flex-wrap: wrap; margin-top: 24px; font-size: 13px; }.footer-nav a { text-decoration: none; }.footer-nav a:hover { text-decoration: underline; text-underline-offset: 4px; }.footer-note { color: var(--muted); font-size: 12px; margin: 18px 0 0; }
.article-main { width: min(760px, calc(100% - 80px)); margin: 65px auto 80px; }.prose h1 { margin-bottom: 27px; font-size: clamp(38px, 4.6vw, 60px); }.article-lede { color: var(--muted); font-size: 20px; line-height: 1.65; margin-bottom: 48px; }.prose h2 { font-size: 25px; margin: 36px 0 16px; line-height: 1.3; }.prose p, .prose li { color: var(--muted); }.prose p { margin-bottom: 20px; }.prose strong { color: var(--ink); font-weight: 600; }.prose a:not(.button) { color: var(--green-strong); text-underline-offset: 3px; }.prose li { margin-bottom: 12px; padding-left: 6px; }.prose ol, .prose ul { padding-left: 23px; }.prose code { background: var(--soft); padding: 2px 5px; border-radius: 4px; color: var(--ink); }.prose > .button { margin-top: 20px; }.article-callout { border-left: 3px solid #6da681; padding: 8px 25px; margin: 32px 0; background: var(--soft); }.article-callout h2 { margin-top: 12px; }.article-callout p { font-size: 15px; }
.private-zone { background: var(--soft); min-height: 100vh; display: flex; flex-direction: column; }.private-header { width: min(1160px, calc(100% - 80px)); }.quiet-link { color: var(--muted); font-size: 13px; }.private-main { width: min(780px, calc(100% - 48px)); margin: 40px auto 52px; flex: 1; }.private-intro { text-align: center; margin: 0 auto 31px; max-width: 610px; }.private-intro h1 { font-size: clamp(34px, 4vw, 46px); margin-bottom: 18px; }.private-intro p { color: var(--muted); font-size: 16px; line-height: 1.7; margin-bottom: 0; }.workspace { background: white; padding: 34px; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 6px 24px #122a2a04; }.workspace h2 { font-size: 29px; margin-bottom: 18px; }.workspace p { color: var(--muted); font-size: 15px; }.workspace label { font-size: 14px; font-weight: 600; display: block; margin-bottom: 10px; }.field-heading { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 10px; }.field-heading label { margin-bottom: 0; }.field-heading > span { color: var(--muted); font-size: 12px; font-variant-numeric: tabular-nums; }
textarea, input[type="text"], select { background: white; color: var(--ink); border: 1px solid #809486; border-radius: 8px; width: 100%; min-height: 48px; padding: 12px 14px; font-size: 15px; }.workspace textarea { display: block; resize: vertical; min-height: 190px; font: 14px/1.65 ui-monospace, "SFMono-Regular", Consolas, monospace; }.workspace textarea::placeholder { color: var(--muted); }.workspace textarea[aria-invalid="true"] { border-color: var(--error); }.workspace .field-help { font-size: 12px; line-height: 1.6; margin: 10px 0 0; color: var(--muted); }.form-bottom { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; margin-top: 27px; }.expiration-field { width: 190px; flex-shrink: 0; }.expiration-field label { font-size: 12px; margin-bottom: 7px; }.expiration-field select { padding-right: 25px; }.form-bottom .button { font-size: 14px; }.workspace .status { font-size: 12px; border-top: 1px solid var(--line); padding-top: 18px; margin: 25px 0 0; min-height: 38px; }.status.status-error, .field-heading > .status-error { color: var(--error); }.link-controls { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }.link-controls input { flex: 1; min-width: 0; font-family: ui-monospace, "SFMono-Regular", Consolas, monospace; font-size: 12px; background: var(--soft); }.link-controls .button { flex-shrink: 0; }.workspace #created-secret > .text-link { margin-top: 22px; }.private-notes { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; margin-top: 26px; padding: 0 6px; }.private-notes p { color: var(--muted); font-size: 12px; line-height: 1.7; margin: 0; }.private-notes strong { display: block; color: var(--ink); font-weight: 600; margin-bottom: 4px; }.reveal-workspace { max-width: 640px; margin-inline: auto; }.reveal-workspace #reveal-controls { text-align: center; padding: 8px 18px; }.reveal-mark { margin-bottom: 26px; }.reveal-mark img { display: block; margin-inline: auto; border-radius: 16px; }.reveal-workspace #reveal-controls > p { max-width: 435px; margin: 0 auto 26px; }.reveal-workspace #reveal-controls > .field-help { font-size: 12px; margin: 18px auto 0; }.secret-output { white-space: pre-wrap; overflow-wrap: anywhere; word-break: break-word; background: var(--soft); border: 1px solid var(--line); border-radius: 8px; padding: 20px; font: 14px/1.75 ui-monospace, "SFMono-Regular", Consolas, monospace; max-height: 60vh; overflow-y: auto; user-select: text; margin: 0 0 22px; }.private-footer { display: flex; justify-content: center; align-items: center; gap: 10px; flex-wrap: wrap; padding: 0 24px 30px; color: var(--muted); font-size: 12px; }.private-footer p { width: 100%; text-align: center; margin: 0 0 2px; }.private-footer a { text-underline-offset: 3px; }.error-content { text-align: center; max-width: 650px; padding: 75px 0; margin: auto; }.error-content h1 { font-size: clamp(38px, 4vw, 54px); }.error-content p { color: var(--muted); margin: 23px 0 30px; }
@media (min-width: 1440px) { .hero { padding-top: 110px; padding-bottom: 120px; } }
@media (max-width: 1000px) {
    .page-width, .site-header { width: calc(100% - 56px); }
    .hero { gap: 45px; padding: 55px 0 70px; grid-template-columns: 1.15fr 1fr; }
    .hero h1 { font-size: 56px; }.hero-lede { font-size: 16px; }.handoff-visual { padding: 23px; }
    .workflow { padding: 55px 0 65px; }.step-list { gap: 30px; }.use-cases { gap: 55px; }
    .closing-cta { padding: 32px; }.closing-cta h2 { font-size: 26px; }.closing-cta .button { font-size: 13px; padding-inline: 18px; }
}
@media (max-width: 740px) {
    .page-width, .site-header { width: calc(100% - 40px); }
    .site-header { min-height: 84px; gap: 18px; }.brand { font-size: 21px; }.brand img { width: 29px; height: 29px; }.header-nav { gap: 18px; }.header-nav > a:not(.button) { display: none; }.header-nav .button { font-size: 12px; min-height: 38px; padding: 9px 13px; }
    .hero { display: block; padding: 46px 0 60px; }.hero h1 { max-width: 490px; font-size: clamp(45px, 10vw, 62px); margin-bottom: 24px; }.hero-lede { max-width: 520px; font-size: 16px; margin-bottom: 27px; }.hero .button { font-size: 14px; padding-inline: 21px; }.hero-note { font-size: 12px; }.handoff-visual { max-width: none; margin-top: 42px; padding: 25px; }.visual-message { margin-top: 22px; }.visual-cipher { flex-direction: column; align-items: flex-start; gap: 12px; padding: 18px; }.cipher-text { font-size: 14px; white-space: nowrap; }.cipher-label { font-size: 10px; }.visual-bottom { margin-top: 20px; }
    .section-heading { display: block; margin-bottom: 35px; }.section-heading h2 { font-size: 33px; margin-bottom: 22px; }.section-heading p { padding: 0; font-size: 15px; max-width: 450px; }.step-list { grid-template-columns: 1fr; gap: 31px; }.step-list li { position: relative; padding-left: 53px; }.step-number { position: absolute; left: 0; top: 1px; }.step-list h3 { font-size: 23px; margin-bottom: 10px; }.step-list p { font-size: 14px; max-width: 500px; }.workflow { padding: 43px 0 53px; }
    .use-cases { grid-template-columns: 1fr; gap: 37px; padding: 45px 0 50px; }.use-cases h2 { font-size: 33px; margin-bottom: 24px; }.use-cases p { font-size: 15px; }.use-case-detail { border-top: 1px solid var(--line); padding-top: 30px; }
    .closing-cta { display: block; padding: 29px 25px; margin-bottom: 35px; }.closing-cta h2 { font-size: 27px; }.closing-cta p { font-size: 14px; }.closing-cta .button { margin-top: 22px; font-size: 14px; }.footer-top { display: block; }.footer-top p { margin-top: 15px; }.footer-nav { gap: 12px 22px; font-size: 12px; }.footer-note { font-size: 11px; }
    .article-main { width: calc(100% - 40px); margin-top: 43px; margin-bottom: 55px; }.prose h1 { font-size: 40px; line-height: 1.12; }.article-lede { font-size: 18px; margin-bottom: 35px; }.prose h2 { font-size: 23px; }.prose p, .prose li { font-size: 15px; }.article-callout { padding-inline: 19px; }
    .private-header { min-height: 82px; }.private-header .quiet-link { max-width: 140px; font-size: 11px; text-align: right; line-height: 1.5; }.private-main { width: calc(100% - 32px); margin-top: 30px; }.private-intro { padding-inline: 4px; margin-bottom: 27px; }.private-intro h1 { font-size: 34px; letter-spacing: -.045em; }.private-intro p { font-size: 14px; }.workspace { padding: 23px 20px; }.workspace h2 { font-size: 26px; }.workspace p { font-size: 14px; }.workspace textarea { min-height: 195px; font-size: 13px; }.field-heading > span { font-size: 11px; }.field-heading label { font-size: 13px; }.form-bottom { flex-direction: column; align-items: stretch; gap: 20px; margin-top: 23px; }.expiration-field { width: 100%; }.form-bottom .button { min-height: 51px; font-size: 14px; }.private-notes { grid-template-columns: 1fr; gap: 15px; padding-inline: 5px; }.private-notes strong { display: inline; margin-right: 4px; }.link-controls { flex-direction: column; align-items: stretch; gap: 10px; }.link-controls input { width: 100%; font-size: 11px; }.workspace #created-secret > .text-link { margin-top: 16px; }.workspace .status { font-size: 11px; }.reveal-workspace #reveal-controls { padding: 5px 0; }.secret-output { font-size: 13px; padding: 15px; }.private-footer { font-size: 11px; }.error-content { padding-top: 55px; }.error-content h1 { font-size: 38px; }
}
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; } }