@font-face {
  font-family: "Space Grotesk";
  src: url("/assets/space-grotesk-latin.woff2") format("woff2");
  font-style: normal;
  font-weight: 600 700;
  font-display: swap;
}

:root {
  color-scheme: dark;
  --ink: #f3f6fc;
  --ink-muted: #aeb9cc;
  --canvas: #111722;
  --panel-solid: #1a2434;
  --line: #f3f6fc26;
  --line-strong: #f3f6fc45;
  --accent: #528dff;
  --accent-soft: #528dff14;
  --max-width: 1320px;
  --gutter: clamp(1.5rem, 5vw, 5rem);
  --section-space: clamp(4rem, 8vw, 7rem);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-heading: "Space Grotesk", var(--font-sans);
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--canvas); }
body {
  position: relative;
  isolation: isolate;
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  background: var(--canvas);
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; }
svg { display: block; max-width: 100%; }
::selection { color: var(--canvas); background: var(--accent); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 6px; }
.shell { width: min(100%, calc(var(--max-width) + 2 * var(--gutter))); margin-inline: auto; padding-inline: var(--gutter); }
/* Shared header and the existing three-line menu component. */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: transparent;
  transition: background-color 260ms ease, box-shadow 260ms ease;
}
.site-header.is-scrolled {
  background: rgb(17 23 34 / .84);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  box-shadow: 0 1px 0 var(--line);
}
.site-header.is-menu-open {
  background: transparent;
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
  box-shadow: none;
}
body.menu-open { overflow: hidden; }
body.menu-open main, body.menu-open .site-footer { visibility: hidden; }
.header-inner { display: flex; min-height: 6rem; align-items: center; justify-content: space-between; gap: 2rem;  }
.brand { position: relative; z-index: 85; display: inline-flex; font-family: var(--font-heading); font-size: 1.6rem; font-weight: 700; letter-spacing: -.065em; line-height: 1; }
.brand::after { content: "."; color: var(--accent); }
.mobile-menu-toggle-shell { display: none; position: absolute; top: 1.375rem; right: max(var(--gutter), calc((100vw - var(--max-width)) / 2)); z-index: 90; }
.mobile-menu-toggle { display: flex; width: 52px; height: 52px; flex-direction: column; align-items: center; justify-content: center; gap: 6px; padding: 0; border: 0; border-radius: 0; color: var(--ink); background: transparent; cursor: pointer; transition: color 200ms; }
.mobile-menu-toggle:hover { color: var(--accent); }
.mobile-menu-toggle-line { width: 20px; height: 1.5px; background: currentColor; transition: transform 280ms ease, opacity 200ms ease; }
.mobile-menu-toggle.is-open .mobile-menu-toggle-line:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.mobile-menu-toggle.is-open .mobile-menu-toggle-line:nth-child(2) { opacity: 0; transform: scaleX(.2); }
.mobile-menu-toggle.is-open .mobile-menu-toggle-line:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }
.mobile-menu-overlay { position: fixed; inset: 0; z-index: 80; overflow-y: auto; background: transparent; animation: menu-overlay-in 300ms ease both; }
.mobile-menu-overlay[hidden] { display: none; }
.mobile-menu-overlay.is-closing { animation: menu-overlay-out 260ms ease both; }
.mobile-menu-panel { display: grid; width: min(100%, 1000px); min-height: 100%; align-content: center; gap: 2rem; margin-inline: auto; padding: 8rem var(--gutter) 4rem; animation: menu-panel-in 420ms cubic-bezier(.22,1,.36,1) both; }
.mobile-menu-overlay.is-closing .mobile-menu-panel { animation: menu-panel-out 260ms ease both; }
.mobile-menu-nav { display: grid; gap: .4rem; }
.mobile-menu-link { display: block; width: fit-content; max-width: 100%; padding: .15rem 0; font-family: var(--font-heading); font-size: clamp(3.5rem, 9vw, 7rem); font-weight: 700; letter-spacing: -.065em; line-height: 1.1; opacity: 0; animation: menu-link-in 420ms ease forwards; }
.mobile-menu-link:nth-child(2) { animation-delay: 50ms; }
.mobile-menu-link:nth-child(3) { animation-delay: 100ms; }
.mobile-menu-link:hover, .mobile-menu-link[aria-current="page"] { color: var(--accent); }
@keyframes menu-overlay-in { from { opacity: 0; } to { opacity: 1; } }
@keyframes menu-overlay-out { from { opacity: 1; } to { opacity: 0; } }
@keyframes menu-panel-in { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }
@keyframes menu-panel-out { from { opacity: 1; transform: translateY(0); } to { opacity: 0; transform: translateY(-18px); } }
@keyframes menu-link-in { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }

h1, h2, h3 { font-family: var(--font-heading); }
.eyebrow { margin: 0 0 2rem; color: var(--ink-muted); font-family: var(--font-mono); font-size: .72rem; line-height: 1.5; letter-spacing: .08em; text-transform: uppercase; }

/* A shared, full-viewport atmosphere with subtle scroll movement. */
.site-atmosphere {
  position: fixed;
  inset: -80px;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(ellipse at 95% 12%, #2877a32e, transparent 55%),
    radial-gradient(ellipse at 85% 85%, #2d64c43d, transparent 58%),
    linear-gradient(125deg, transparent 35%, #528dff08 52%, transparent 70%),
    var(--canvas);
  transform: translate3d(0, var(--background-y, 0px), 0);
}
.desktop-nav { display: flex; align-items: center; gap: 2.25rem; color: var(--ink-muted); font-size: .9rem; }
.desktop-nav a { padding-block: .5rem; transition: color 180ms; }
.desktop-nav a:hover, .desktop-nav a[aria-current="page"] { color: var(--ink); }
body.home { display: flex; height: 100svh; flex-direction: column; }
body.home main { display: flex; min-height: 0; flex: 1; }
.home-hero { position: relative; display: flex; flex: 1; }
.home-layout { display: grid; min-height: 0; grid-template-rows: minmax(0, 1fr) auto; padding-top: clamp(1.5rem, 5vh, 4rem); }
.home-intro { align-self: center; padding-bottom: clamp(1rem, 4vh, 4rem); }
.home-intro h1 { margin: 0 0 2rem; font-size: clamp(3.25rem, 13.5vw, 11.5rem); font-weight: 700; letter-spacing: -.075em; line-height: .98; }
.home-intro h1 span { display: inline-block; padding-right: .12em; color: var(--accent); }
.home-description { margin: 0; color: var(--ink-muted); font-size: clamp(1rem, 1.6vw, 1.25rem); line-height: 1.65; }
.home-contact { position: relative; z-index: 2; display: flex; grid-column: 1 / -1; align-items: center; justify-content: space-between; gap: 1.5rem; align-self: end; padding-block: 1.75rem 2rem; border-top: 1px solid var(--line); }
.home-contact p { margin: 0; color: var(--ink-muted); font-size: .85rem; }
.email-link { display: inline-flex; align-items: center; gap: .5rem; width: fit-content; color: var(--ink); font-family: var(--font-heading); font-weight: 600; letter-spacing: -.045em; text-decoration: none; overflow-wrap: anywhere; }
.email-link span { color: var(--accent); font-family: var(--font-sans); font-weight: 400; transition: transform 220ms; }
.email-link:hover { color: var(--accent); }
.email-link:hover span { transform: translate(3px, -3px); }
.home-contact .email-link { font-size: clamp(1.25rem, 2vw, 1.75rem); }
.site-footer { border-top: 1px solid var(--line); color: var(--ink-muted); }
.footer-inner { display: flex; min-height: 5rem; align-items: center; justify-content: space-between; gap: 2rem; font-size: .75rem; }
.footer-credit { white-space: nowrap; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 1.5rem; }
.footer-nav a:hover { color: var(--accent); }

/* Product and policy pages share the typography and palette. */
.page-hero { position: relative; overflow: hidden; padding-block: clamp(4rem, 9vw, 7rem); border-bottom: 1px solid var(--line); }
.privacy-hero { padding-block: clamp(3rem, 7vw, 5rem); }
.page-hero h1 { max-width: 14ch; margin: 0; font-size: clamp(3.2rem, 7vw, 6.6rem); font-weight: 700; letter-spacing: -.065em; line-height: 1; }
.page-hero h1 span { color: var(--accent); }
.page-hero-copy { display: grid; grid-template-columns: 1.25fr .75fr; gap: clamp(2rem, 7vw, 6rem); align-items: end; }
.page-intro { max-width: 34rem; margin: 0; color: var(--ink-muted); font-size: 1.1rem; }
.badge { display: inline-flex; align-items: center; gap: .5rem; margin-top: 1.5rem; padding: .45rem .7rem; border: 1px solid var(--line-strong); border-radius: 999px; color: var(--ink-muted); font-family: var(--font-mono); font-size: .72rem; text-transform: uppercase; }
.badge::before { content: ""; width: .4rem; height: .4rem; border-radius: 50%; background: var(--accent); }
.section { padding-block: var(--section-space); border-bottom: 1px solid var(--line); scroll-margin-top: 6rem; }
.section-heading { display: grid; grid-template-columns: .9fr 1.1fr; gap: clamp(2rem, 7vw, 7rem); margin-bottom: 3rem; }
.section-heading h2, .content-section h2 { margin: 0; font-size: clamp(2rem, 4.4vw, 4rem); font-weight: 700; letter-spacing: -.055em; line-height: 1.1; }
.section-heading > p { max-width: 44rem; margin: 0; color: var(--ink-muted); font-size: 1.08rem; }
.app-overview { display: grid; grid-template-columns: 1.15fr .85fr; gap: clamp(2rem, 7vw, 6rem); align-items: center; }
.calculation-card { width: min(100%, 22rem); margin-inline: auto; padding: 1.4rem; border: 1px solid var(--line-strong); border-radius: 1.15rem; background: #1a2434ed; box-shadow: 0 1rem 4rem #03071130; }
.calc-topline, .calc-row, .calc-result { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.calc-topline { margin-bottom: 1.3rem; color: var(--ink-muted); font-family: var(--font-mono); font-size: .72rem; text-transform: uppercase; }
.calc-chip { padding: .25rem .45rem; border: 1px solid var(--line); border-radius: 999px; }
.calc-row { padding-block: .8rem; border-bottom: 1px solid var(--line); color: var(--ink-muted); font-size: .88rem; }
.calc-row strong { color: var(--ink); font-family: var(--font-mono); font-size: .86rem; }
.calc-result { margin-top: 1.2rem; padding: 1rem; border-radius: .65rem; color: var(--accent); background: var(--accent-soft); }
.calc-result strong { font-family: var(--font-mono); font-size: 1.35rem; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.feature { padding-block: 1.5rem; border-top: 1px solid var(--line-strong); }
.principle-number { color: var(--accent); font-family: var(--font-mono); font-size: .72rem; }
.feature h3 { margin: 2rem 0 .8rem; font-size: 1.35rem; letter-spacing: -.04em; }
.feature p { margin: 0; color: var(--ink-muted); }
.contact-band { display: grid; grid-template-columns: 1.2fr .8fr; gap: 3rem; align-items: end; padding-block: clamp(4rem, 9vw, 7rem); }
.contact-band h2 { max-width: 14ch; margin: 0; font-size: clamp(2.4rem, 5vw, 4.5rem); letter-spacing: -.06em; line-height: 1.05; }
.contact-note { margin: 0; color: var(--ink-muted); }
.support-email { margin-top: .35rem; font-size: clamp(1.25rem, 2.2vw, 1.6rem); }
.content-section a { color: var(--ink); text-decoration: underline; text-decoration-color: var(--accent); text-underline-offset: .2em; overflow-wrap: anywhere; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 2rem; }
.button { display: inline-flex; min-height: 3.1rem; align-items: center; justify-content: center; gap: .6rem; padding: .75rem 1.15rem; border: 1px solid var(--line-strong); border-radius: .5rem; font-size: .9rem; font-weight: 600; transition: transform 160ms, background 160ms; }
.button:hover { transform: translateY(-2px); background: var(--accent-soft); }
.button-primary { color: var(--canvas); background: var(--accent); }
.button-primary:hover { background: #7ca9ff; }
.privacy-layout { display: grid; gap: clamp(3rem, 6vw, 4rem); max-width: 64rem; padding-block: 3rem var(--section-space); }
.policy-date { margin: 0; color: var(--ink-muted); }
.policy-date strong { color: var(--ink); }
.content-section { scroll-margin-top: 8rem; }
.content-section h2 { margin-bottom: 1.25rem; font-size: clamp(1.75rem, 4vw, 2.7rem); }
.content-section h3 { margin: 2.7rem 0 .8rem; font-size: clamp(1.35rem, 2.5vw, 1.7rem); line-height: 1.2; scroll-margin-top: 8rem; }
.content-section p, .content-section li { color: var(--ink-muted); }
.content-section p { max-width: 50rem; margin: 0 0 1rem; }
.content-section ul { display: grid; gap: .55rem; margin: 1rem 0 0; padding-left: 1.2rem; }
.content-section ul + p { margin-top: 1rem; }
.content-section strong { color: var(--ink); }
.info-box { margin-top: 1.5rem; padding: 1.2rem 1.3rem; border: 1px solid var(--line); border-radius: .5rem; color: var(--ink-muted); background: var(--panel-solid); }
.not-found { display: grid; min-height: calc(100svh - 11rem); place-items: center; padding-block: 4rem; text-align: center; }
.not-found h1 { margin: 0; color: var(--accent); font-size: clamp(4rem, 13vw, 9rem); line-height: 1; }
.not-found h2 { margin: 1rem 0 .7rem; font-size: clamp(1.8rem, 4vw, 3rem); }
.not-found p { margin: 0 0 2rem; color: var(--ink-muted); }

@media (max-width: 860px) {
  .desktop-nav { display: none; }
  .mobile-menu-toggle-shell { display: block; }
  .header-inner { padding-right: calc(var(--gutter) + 4rem); }
  .section-heading, .contact-band, .page-hero-copy, .app-overview, .feature-grid { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .header-inner { min-height: 5rem; }
  .brand { font-size: 1.4rem; }
  .mobile-menu-toggle-shell { top: .875rem; }
  .home-layout { padding-top: clamp(.75rem, 3svh, 3rem); }
  .home-intro { padding-bottom: clamp(.5rem, 3svh, 2rem); }
  .home-intro h1 { margin-bottom: 1.5rem; font-size: clamp(3.25rem, 17vw, 6rem); }
  .home-contact { flex-direction: column; align-items: flex-start; gap: .5rem; padding-block: 1.25rem 1.5rem; }
  .home-contact p { font-size: .75rem; }
  .home-contact .email-link { font-size: clamp(1.2rem, 5vw, 1.55rem); }
  .footer-inner { min-height: 5rem; flex-wrap: wrap; gap: .4rem 1rem; padding-block: 1rem; font-size: .75rem; }
  .footer-nav { gap: .8rem; }
  .page-hero h1 { font-size: clamp(3rem, 12vw, 4.5rem); }
  .mobile-menu-panel { align-content: start; padding-top: 8rem; }
}
@media (max-height: 700px) {
  .home-layout { padding-top: clamp(.5rem, 3svh, 2rem); }
  .home-intro { padding-bottom: clamp(.25rem, 2svh, 1rem); }
  .home-intro h1 { margin-bottom: clamp(.5rem, 2svh, 1rem); font-size: clamp(3.25rem, min(13.5vw, 12svh), 8rem); }
}
@media (max-width: 600px) and (max-height: 700px) {
  .home-intro h1 { font-size: clamp(3.25rem, min(17vw, 12svh), 6rem); }
}
@media (max-height: 500px) {
  .header-inner { min-height: 4rem; }
  .mobile-menu-toggle-shell { top: .375rem; }
  .home-intro h1 { font-size: clamp(2.5rem, min(11vw, 10svh), 5rem); }
  .home-contact { padding-block: .6rem .75rem; }
  .footer-inner { min-height: 3.5rem; padding-block: .5rem; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-delay: 0ms !important; }
  .site-atmosphere { transform: none; }
}
@media print {
  :root { color-scheme: light; --ink: #222; --ink-muted: #444; --accent: #294b9b; }
  body { background: white; }
  .site-header, .site-footer, .site-atmosphere { display: none; }
  .privacy-layout { display: block; }
  .content-section { margin-block: 2rem; }
}