/* ---------- Font ---------- */

/* Inter, subset to the glyphs this page uses plus headroom, with the variable
   weight axis clipped to the 400-600 range the design actually spans.
   Self-hosted: no third-party request, no GDPR exposure, works offline and
   where Google is blocked.
   font-display: optional — the preloaded 21KB file almost always wins its
   block period, and on a slow connection the fallback simply stays, so the
   page never reflows. A swap would shift the text after paint.
   Two declarations must stay in step with the binary: the unicode-range
   (declaring a codepoint the font lacks makes the browser drop the font for it)
   and font-weight (declaring a range the axis does not carry invites synthesis). */
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 400 600;
  font-display: optional;
  src: url("fonts/inter.woff2") format("woff2");
  unicode-range: U+0020-007E, U+00A0, U+00A9, U+00AB, U+00B7, U+00BB, U+00C0,
    U+00C8-00C9, U+00CC, U+00D2, U+00D9, U+00E0, U+00E8-00E9, U+00EC, U+00F2,
    U+00F9, U+2013-2014, U+2018-2019, U+201C-201D, U+2022, U+2026;
}

/* ---------- Design tokens ---------- */

:root {
  --bg: #ffffff;
  --text: #0e1220;
  --text-muted: #5a6478;
  --brand: #4563ff;
  --brand-dark: #3d5bfa;

  /* The logo width doubles as the measure for the description,
     so the wordmark and the copy share one column. */
  --column: 23rem;
}

/* ---------- Base ---------- */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI",
    Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: #ffffff;
  background-color: var(--bg);
  color: #0e1220;
  color: var(--text);
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection {
  background: rgba(69, 99, 255, 0.18);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ---------- Hero ---------- */

/* Every rule below states a plain value first and the modern one second.
   A browser that cannot parse min()/max()/clamp()/env()/var() discards that
   declaration and keeps the plain one. Without the fallback the `* { padding: 0 }`
   reset would win and the text would sit flush against the screen edge. */
.hero {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1.5rem;
  padding-block: clamp(1.25rem, 4vh, 2rem);
  padding-left: max(clamp(1.5rem, 5vw, 2rem), env(safe-area-inset-left));
  padding-right: max(clamp(1.5rem, 5vw, 2rem), env(safe-area-inset-right));
}

.hero-content {
  text-align: center;
  width: 100%;
  max-width: 23rem;
  max-width: var(--column);
}

/* Gentle staggered fade-in */
.logo,
.description,
.cta {
  animation: fade-in 1.4s ease-out both;
}

.description {
  animation-delay: 0.25s;
}

.cta {
  animation-delay: 0.5s;
}

/* ---------- Logo ---------- */

/* The SVG viewBox is cropped to the artwork, so this box is the wordmark
   itself: margins below are true optical gaps, not padding around empty space. */
/* Fallback is fluid-then-capped, never a fixed width: a plain `width: 23rem`
   would overflow a 360px phone on any browser that drops the min() below. */
.logo {
  width: 100%;
  max-width: 23rem;
  width: min(var(--column), 72vw);
  height: auto;
  display: block;
  margin: 0 auto 1.25rem;
  margin-bottom: clamp(1rem, 2.4vh, 1.5rem);
}

/* ---------- Description ---------- */

.description {
  font-size: 1.2rem;
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  line-height: 1.5;
  text-wrap: balance;
  color: #5a6478;
  color: var(--text-muted);
  max-width: 23rem;
  max-width: var(--column);
  margin: 0 auto 3rem;
  margin-bottom: clamp(1.75rem, 5vh, 3rem);
}

/* ---------- CTA ---------- */

.cta {
  display: inline-flex;
  align-items: center;
  background: #4563ff;
  background: var(--brand);
  color: #ffffff;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  padding: 0.875rem 2rem;
  border-radius: 999px;
  transition: background 0.2s ease;
}

/* A margin, not `gap`: flexbox gap is unsupported on Safari < 14.1 and on the
   older WebViews still common outside Europe, where the icon would touch the label. */
.cta svg {
  margin-right: 0.5rem;
}

/* :hover and :focus-visible are separate rules on purpose. In one selector list,
   a browser that does not know :focus-visible discards the WHOLE rule — taking
   the hover state with it. */
.cta:hover {
  background: #3d5bfa;
  background: var(--brand-dark);
}

.cta:focus-visible {
  background: var(--brand-dark);
  outline: 2px solid var(--brand-dark);
  outline-offset: 3px;
}

/* Fallback for browsers without :focus-visible — they get a ring on click too,
   which is the safe failure mode. The second rule silences that where supported. */
.cta:focus {
  outline: 2px solid #3d5bfa;
  outline-offset: 3px;
}

.cta:focus:not(:focus-visible) {
  outline: none;
}

/* ---------- Legal pages (privacy) ---------- */

/* A reading column, not a hero: left-aligned, narrower measure. Reuses the
   same white, the same Inter, the same blue. Nothing new is introduced. */
.legal {
  flex: 1;
  width: 100%;
  max-width: 38rem;
  margin: 0 auto;
  padding: 3.5rem 1.5rem;
  padding-block: clamp(2.5rem, 8vh, 5rem);
  padding-left: max(clamp(1.5rem, 5vw, 2rem), env(safe-area-inset-left));
  padding-right: max(clamp(1.5rem, 5vw, 2rem), env(safe-area-inset-right));
  animation: fade-in 1.4s ease-out both;
}

.legal-logo {
  display: inline-block;
  margin-bottom: 3rem;
}

.legal-logo img {
  width: 9rem;
  height: auto;
  display: block;
}

.legal h1 {
  font-size: 2rem;
  font-size: clamp(1.6rem, 4vw, 2.1rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}

.legal h2 {
  font-size: 1rem;
  font-weight: 600;
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
}

.legal p {
  font-size: 1rem;
  line-height: 1.7;
  color: #5a6478;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.legal .lede {
  font-size: 1.1rem;
  color: #0e1220;
  color: var(--text);
}

.legal strong {
  font-weight: 600;
  color: #0e1220;
  color: var(--text);
}

.legal a {
  color: #4563ff;
  color: var(--brand);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.legal a:hover {
  color: #3d5bfa;
  color: var(--brand-dark);
}

.legal a:focus-visible {
  color: var(--brand-dark);
  outline: 2px solid var(--brand-dark);
  outline-offset: 2px;
}

.legal a:focus {
  outline: 2px solid #3d5bfa;
  outline-offset: 2px;
}

.legal a:focus:not(:focus-visible) {
  outline: none;
}

.legal .back {
  margin-top: 3rem;
}

/* ---------- Footer ---------- */

footer {
  text-align: center;
  padding: 1.5rem;
  padding-bottom: max(1.5rem, calc(1rem + env(safe-area-inset-bottom)));
  font-size: 0.85rem;
  color: #5a6478;
  color: var(--text-muted);
  animation: fade-in 1.4s ease-out 0.7s both;
}

footer a {
  color: inherit;
  text-decoration: none;
}

footer a:hover {
  color: #4563ff;
  color: var(--brand);
  text-decoration: underline;
  text-underline-offset: 2px;
}

footer a:focus-visible {
  color: var(--brand);
  text-decoration: underline;
  outline: 2px solid var(--brand-dark);
  outline-offset: 2px;
}

footer a:focus {
  outline: 2px solid #3d5bfa;
  outline-offset: 2px;
}

footer a:focus:not(:focus-visible) {
  outline: none;
}

/* Thin separator between the copyright line and the privacy link. */
.footer-sep {
  margin: 0 0.5rem;
  opacity: 0.4;
}

/* Landscape phones and other short viewports: shrink the wordmark
   so the whole composition still fits on one screen. */
@media (max-height: 520px) {
  .logo {
    max-width: 15rem;
    width: min(15rem, 45vw);
  }

  footer {
    padding-block: 1rem;
    padding-bottom: max(1rem, calc(0.5rem + env(safe-area-inset-bottom)));
  }
}

/* Screens smaller than any current phone: the label would wrap and the
   stack would outgrow the viewport. Reclaim the few pixels needed. */
@media (max-width: 300px), (max-height: 400px) {
  /* Must keep max()+env(): a bare padding-inline here would override the
     base rule's safe-area insets, and (max-height: 400px) is exactly the
     landscape phone case where the notch sits on the side. */
  .hero {
    padding-left: 1rem;
    padding-right: 1rem;
    padding-left: max(1rem, env(safe-area-inset-left));
    padding-right: max(1rem, env(safe-area-inset-right));
  }

  .description {
    margin-bottom: 1.5rem;
  }

  /* At this size the label fits on one line only without the wide padding.
     nowrap is safe here but not at large text-zoom, so it stays scoped. */
  .cta {
    padding: 0.875rem 1rem;
    white-space: nowrap;
  }

  footer {
    padding-block: 0.75rem;
    padding-bottom: max(0.75rem, calc(0.5rem + env(safe-area-inset-bottom)));
  }
}

/* In Windows High Contrast the button's background is stripped, leaving the
   label with no affordance. Restore an outline in that mode only. */
@media (forced-colors: active) {
  .cta {
    border: 1px solid LinkText;
  }
}

/* Printed, the white label on a dropped-out background would vanish and the
   destination would be lost. */
@media print {
  .cta {
    background: none;
    color: #4563ff;
    color: var(--brand);
    border: 1px solid #4563ff;
    border: 1px solid var(--brand);
  }

  .cta::after {
    content: " (" attr(href) ")";
    font-weight: 400;
  }
}

/* ---------- Animations ---------- */

@keyframes fade-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .logo,
  .description,
  .cta,
  footer {
    animation: none;
  }
  .cta {
    transition: none;
  }
}