:root {
  --paper: #f6f4ee;
  --white: #fffefa;
  --ink: #12233b;
  --muted: #546274;
  --line: #d7dce1;
  --blue: #155cda;
  --blue-dark: #0d3f9e;
  --blue-pale: #e9f0ff;
  --sage: #dce9df;
  --sage-ink: #24533a;
  --night: #0d203a;
  --serif: "Newsreader", Georgia, serif;
  --sans: "Source Sans 3", "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: var(--sans); font-size: 17px; line-height: 1.55; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 4px; }
button, input { font: inherit; }
::selection { color: var(--white); background: var(--blue); }
:focus-visible { outline: 3px solid #f3b43f; outline-offset: 3px; }

.skip-link { position: fixed; left: 1rem; top: -5rem; z-index: 100; padding: .75rem 1rem; background: var(--ink); color: white; }
.skip-link:focus { top: 1rem; }
.site-header, footer { width: min(1380px, calc(100% - 56px)); margin: 0 auto; }
.site-header { min-height: 88px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 700; text-decoration: none; letter-spacing: -.01em; }
.brand-mark { width: 32px; height: 32px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
nav { display: flex; align-items: center; gap: 28px; }
nav a { color: #34465c; font-size: 15px; font-weight: 600; text-decoration: none; }
nav a:hover { color: var(--blue); }
.nav-cta { padding: 10px 17px; border: 1px solid var(--ink); border-radius: 999px; }

.hero { width: min(1380px, calc(100% - 56px)); min-height: 690px; margin: 0 auto; display: grid; grid-template-columns: minmax(330px, .82fr) minmax(590px, 1.35fr); align-items: center; gap: clamp(42px, 6vw, 92px); padding: 76px 0 82px; }
.hero h1, h2 { font-family: var(--serif); font-weight: 600; letter-spacing: -.035em; line-height: .98; }
.hero h1 { max-width: 700px; margin: 0; font-size: clamp(58px, 6.6vw, 102px); }
.hero h1 em { color: var(--blue); font-style: normal; }
.hero-lede { max-width: 610px; margin: 30px 0 28px; color: #3e4e61; font-size: 20px; line-height: 1.5; }
.signup-form label { display: block; margin-bottom: 8px; font-size: 14px; font-weight: 700; }
.signup-row { display: flex; gap: 9px; max-width: 540px; }
.signup-row input { min-width: 0; flex: 1; height: 52px; padding: 0 16px; color: var(--ink); background: var(--white); border: 1px solid #aeb9c6; border-radius: 8px; }
.signup-row input::placeholder { color: #6d7886; }
.signup-row button { flex: 0 0 auto; height: 52px; padding: 0 20px; color: white; background: var(--blue); border: 0; border-radius: 8px; font-weight: 700; cursor: pointer; box-shadow: 0 5px 16px rgba(21, 92, 218, .22); }
.signup-row button:hover { background: var(--blue-dark); }
.signup-row button:disabled { cursor: wait; opacity: .68; }
.form-note, .form-status { min-height: 24px; margin: 8px 0 0; color: var(--muted); font-size: 14px; }
.form-status[data-state="success"] { color: var(--sage-ink); font-weight: 700; }
.form-status[data-state="error"] { color: #9b2f2f; font-weight: 700; }
.honeypot { position: absolute !important; width: 1px !important; height: 1px !important; overflow: hidden; opacity: 0; pointer-events: none; }

.evidence-stage { position: relative; min-height: 550px; padding: 78px 20px 22px; border-top: 1px solid #aeb8c5; border-bottom: 1px solid #aeb8c5; }
.example-label { position: absolute; top: 18px; left: 50%; margin: 0; color: var(--muted); font-size: 13px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; transform: translateX(-50%); }
.source-rail { position: absolute; z-index: 2; top: 82px; display: flex; width: 190px; flex-direction: column; gap: 6px; }
.source-files { left: 0; }
.source-email { right: 0; text-align: right; }
.source-kind { margin-bottom: 5px; color: var(--ink); font-size: 14px; font-weight: 700; }
.source-item { color: var(--muted); font-size: 13px; white-space: nowrap; }
.source-item::before { content: ""; display: inline-block; width: 7px; height: 7px; margin-right: 8px; background: var(--blue); border-radius: 50%; }
.source-email .source-item::before { display: none; }
.source-email .source-item::after { content: ""; display: inline-block; width: 7px; height: 7px; margin-left: 8px; background: var(--blue); border-radius: 50%; }
.evidence-path { position: absolute; z-index: 1; top: 67px; left: 6%; width: 88%; height: 200px; overflow: visible; }
.evidence-path path { fill: none; stroke: var(--blue); stroke-width: 2; stroke-dasharray: 640; stroke-dashoffset: 0; }
.answer-sheet { position: relative; z-index: 3; width: min(550px, 74%); margin: 125px auto 0; background: var(--white); border: 1px solid #cfd6dd; border-radius: 14px; box-shadow: 0 22px 50px rgba(21, 40, 68, .14); overflow: hidden; }
.question { margin: 0; padding: 20px 24px; color: var(--white); background: var(--night); font-family: var(--serif); font-size: 20px; font-weight: 500; line-height: 1.25; }
.answer { padding: 20px 24px 13px; color: #304156; font-size: 15px; }
.answer p { margin: 0 0 12px; }
.answer strong { color: var(--ink); }
.citations { display: flex; flex-direction: column; gap: 7px; padding: 14px 24px 20px; background: #f2f6f4; border-top: 1px solid #d2dfd6; color: var(--sage-ink); font-size: 13px; font-weight: 600; }
.citations b { display: inline-grid; width: 20px; height: 20px; margin-right: 6px; place-items: center; color: var(--white); background: var(--sage-ink); border-radius: 50%; font-size: 11px; }
.mobile-evidence-path { display: none; }
.js .evidence-stage.in-view .evidence-path path { animation: draw-path .85s cubic-bezier(.16, 1, .3, 1) both; }
@keyframes draw-path { from { stroke-dashoffset: 640; } to { stroke-dashoffset: 0; } }

.promise-strip { display: grid; grid-template-columns: repeat(4, 1fr); color: #eaf0fa; background: var(--night); border-top: 1px solid #324a66; border-bottom: 1px solid #324a66; }
.promise-strip p { margin: 0; padding: 22px 30px; text-align: center; border-right: 1px solid #324a66; font-size: 14px; font-weight: 600; }
.promise-strip p:last-child { border: 0; }

.mechanism { width: min(1180px, calc(100% - 56px)); margin: 0 auto; padding: 132px 0 150px; }
.section-intro { display: grid; grid-template-columns: 1.35fr .65fr; gap: 80px; align-items: end; padding-bottom: 52px; border-bottom: 1px solid var(--line); }
h2 { margin: 0; font-size: clamp(48px, 6vw, 86px); }
.section-intro p, .privacy-heading p { max-width: 460px; margin: 0; color: var(--muted); font-size: 19px; }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); }
.steps article { display: flex; gap: 19px; padding: 36px 30px 0 0; }
.steps article + article { padding-left: 30px; border-left: 1px solid var(--line); }
.steps svg { flex: 0 0 42px; width: 42px; height: 42px; fill: none; stroke: var(--blue); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.steps h3 { margin: 0 0 8px; font-family: var(--serif); font-size: 25px; line-height: 1.1; }
.steps p { margin: 0; color: var(--muted); font-size: 16px; }

.use-scene { display: grid; grid-template-columns: 1.1fr .9fr; min-height: 690px; background: #dce6e8; }
.scene-photo { min-height: 580px; overflow: hidden; }
.scene-photo img { width: 100%; height: 100%; display: block; object-fit: cover; object-position: 44% center; }
.scene-copy { display: flex; flex-direction: column; justify-content: center; padding: 80px clamp(42px, 7vw, 110px); }
.scene-copy h2 { max-width: 700px; font-size: clamp(46px, 5vw, 74px); }
.scene-copy > p { max-width: 550px; color: #405261; }
.scene-copy blockquote { max-width: 600px; margin: 28px 0; padding: 25px 0; border-top: 1px solid #8ea0aa; border-bottom: 1px solid #8ea0aa; font-family: var(--serif); font-size: 27px; line-height: 1.25; }

.privacy { display: grid; grid-template-columns: 1fr 1fr; gap: 100px; width: min(1180px, calc(100% - 56px)); margin: 0 auto; padding: 150px 0; }
.privacy-heading h2 { margin-bottom: 30px; font-size: clamp(50px, 5.4vw, 78px); }
.privacy-facts dl { margin: 0; border-top: 1px solid var(--line); }
.privacy-facts dl div { display: grid; grid-template-columns: 90px 1fr; gap: 25px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.privacy-facts dt { font-weight: 700; }
.privacy-facts dd { margin: 0; color: var(--muted); }
.responsibility-note { margin: 24px 0 0; color: #465569; font-size: 14px; }

.faq { width: min(920px, calc(100% - 56px)); margin: 0 auto; padding: 20px 0 150px; }
.faq h2 { margin-bottom: 55px; text-align: center; }
.faq-list { border-top: 1px solid var(--ink); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { position: relative; padding: 25px 48px 25px 0; cursor: pointer; list-style: none; font-family: var(--serif); font-size: 25px; font-weight: 600; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 6px; color: var(--blue); font-family: var(--sans); font-size: 30px; font-weight: 400; line-height: .8; }
.faq details[open] summary::after { content: "−"; }
.faq details p { max-width: 680px; margin: -5px 0 26px; color: var(--muted); }

.final-cta { display: grid; grid-template-columns: 1fr .82fr; gap: 100px; align-items: center; padding: 100px max(28px, calc((100vw - 1180px) / 2)); color: var(--white); background: var(--blue); }
.final-cta h2 { max-width: 650px; font-size: clamp(54px, 6vw, 88px); }
.final-cta > div p { max-width: 550px; color: #e7efff; font-size: 19px; }
.signup-form-light .signup-row input { border-color: white; }
.signup-form-light .signup-row button { color: var(--blue); background: white; box-shadow: 0 6px 18px rgba(0, 27, 86, .2); }
.signup-form-light .signup-row button:hover { background: #f0f4ff; }
.signup-form-light .form-note, .signup-form-light .form-status { color: #e7efff; }
.signup-form-light .form-status[data-state="success"] { color: white; }
.signup-form-light .form-status[data-state="error"] { color: #ffe9b7; }

footer { display: grid; grid-template-columns: 1fr 1fr 1fr; align-items: center; min-height: 130px; color: #495a6e; font-size: 14px; }
footer p { text-align: center; }
footer > div { display: flex; justify-content: flex-end; gap: 24px; }
.footer-brand { font-size: 15px; }

.privacy-page main { width: min(760px, calc(100% - 40px)); margin: 0 auto; padding: 100px 0 130px; }
.privacy-page h1 { margin: 0 0 24px; font-family: var(--serif); font-size: clamp(52px, 7vw, 84px); letter-spacing: -.035em; line-height: 1; }
.privacy-page .updated { color: var(--muted); }
.privacy-page h2 { margin: 55px 0 14px; font-size: 34px; line-height: 1.1; letter-spacing: -.02em; }
.privacy-page li + li { margin-top: 8px; }

@media (max-width: 1050px) {
  .hero { grid-template-columns: 1fr; padding-top: 60px; }
  .hero-copy { max-width: 760px; }
  .evidence-stage { width: min(850px, 100%); margin: 0 auto; }
  .section-intro, .privacy, .final-cta { grid-template-columns: 1fr; gap: 46px; }
  .section-intro p { max-width: 650px; }
  .use-scene { grid-template-columns: 1fr; }
  .scene-photo { height: 540px; }
  .scene-copy { padding: 72px 8vw 85px; }
}

@media (max-width: 720px) {
  body { font-size: 16px; }
  .site-header, .hero, .mechanism, .privacy, .faq, footer { width: min(100% - 32px, 620px); }
  .site-header { min-height: 58px; }
  .brand { gap: 7px; }
  .brand-mark { width: 25px; height: 25px; }
  .brand span { font-size: 14px; }
  nav a:not(.nav-cta) { display: none; }
  .nav-cta { padding: 6px 10px; font-size: 13px; }
  .hero { min-height: 0; gap: 13px; padding: 22px 0 50px; }
  .hero h1 { font-size: clamp(40px, 11.8vw, 52px); line-height: .89; }
  .hero-lede { margin: 12px 0 12px; font-size: 13px; line-height: 1.35; }
  .hero .signup-form label { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
  .hero .signup-row { gap: 6px; }
  .hero .signup-row input, .hero .signup-row button { height: 40px; }
  .hero .signup-row button { padding: 0 13px; }
  .hero .form-note { display: none; }
  .evidence-stage { display: grid; grid-template-columns: 1fr 1fr; gap: 0 12px; min-height: 0; padding: 0 0 0; }
  .example-label { position: static; grid-column: 1 / -1; margin-bottom: 4px; transform: none; }
  .source-rail { position: relative; top: auto; width: 100%; padding: 5px 0 7px; text-align: left; border-bottom: 1px solid var(--line); }
  .source-files, .source-email { left: auto; right: auto; }
  .source-kind { margin-bottom: 2px; font-size: 12px; }
  .source-item { font-size: 11px; }
  .source-item:nth-child(3) { display: none; }
  .source-item { white-space: normal; }
  .source-email .source-item::after { display: none; }
  .source-email .source-item::before { display: inline-block; content: ""; width: 7px; height: 7px; margin-right: 8px; background: var(--blue); border-radius: 50%; }
  .evidence-path { display: none; }
  .mobile-evidence-path { display: block; position: absolute; z-index: 1; top: 76px; left: 50%; width: 2px; height: 27px; background: var(--blue); }
  .mobile-evidence-path::after { content: ""; position: absolute; bottom: -4px; left: -3px; width: 8px; height: 8px; background: var(--blue); border-radius: 50%; }
  .answer-sheet { grid-column: 1 / -1; width: calc(100% - 10px); margin: 14px 0 0 10px; }
  .question { padding: 10px 13px; font-size: 13px; }
  .answer { padding: 9px 13px 4px; font-size: 11px; line-height: 1.35; }
  .answer p:nth-child(2), .citations span:nth-child(n+2) { display: none; }
  .citations { padding: 7px 13px 9px; font-size: 10px; }
  .citations b { width: 16px; height: 16px; font-size: 9px; }
  .promise-strip { grid-template-columns: 1fr 1fr; }
  .promise-strip p { padding: 16px 10px; border-bottom: 1px solid #324a66; }
  .mechanism { padding: 90px 0 100px; }
  h2, .privacy-heading h2 { font-size: 48px; }
  .section-intro { gap: 24px; padding-bottom: 35px; }
  .steps { grid-template-columns: 1fr; }
  .steps article, .steps article + article { padding: 28px 0; border-left: 0; border-bottom: 1px solid var(--line); }
  .scene-photo { min-height: 0; height: 390px; }
  .scene-copy { padding: 65px 24px 75px; }
  .scene-copy h2 { font-size: 48px; }
  .scene-copy blockquote { font-size: 24px; }
  .privacy { gap: 45px; padding: 95px 0; }
  .privacy-facts dl div { grid-template-columns: 70px 1fr; gap: 14px; }
  .faq { padding-bottom: 100px; }
  .faq h2 { text-align: left; }
  .faq summary { font-size: 22px; }
  .final-cta { gap: 45px; padding: 74px 24px 80px; }
  .final-cta h2 { font-size: 54px; }
  footer { grid-template-columns: 1fr; gap: 18px; padding: 34px 0; }
  footer p { margin: 0; text-align: left; }
  footer > div { justify-content: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .evidence-path path { animation: none !important; stroke-dashoffset: 0; }
}