:root {
  --paper: #F5F0E6;
  --card: #FFFCF6;
  --ink: #15140F;
  --muted: #5C574E;
  --dune: #806344;
  --dune-soft: rgba(128, 99, 68, 0.12);
  --rule: rgba(21, 20, 15, 0.08);
  color-scheme: light;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--paper) url("assets/paper.png") repeat;
  background-size: 128px 128px;
  color: var(--ink);
  font: 17px/1.5 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Hiragino Sans", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--dune); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Bar */
.bar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px max(20px, env(safe-area-inset-right)) 12px max(20px, env(safe-area-inset-left));
  background: rgba(245, 240, 230, 0.82);
  -webkit-backdrop-filter: saturate(1.4) blur(16px);
  backdrop-filter: saturate(1.4) blur(16px);
  border-bottom: 1px solid var(--rule);
}
.mark img { display: block; border-radius: 7px; }
.bar nav { display: flex; gap: 22px; font-size: 15px; }

/* Hero */
.hero {
  text-align: center;
  padding: 72px 20px 40px;
}
.hero .icon {
  width: 112px;
  height: 112px;
  border-radius: 25px;
  box-shadow: 0 12px 32px rgba(60, 45, 25, 0.18);
}
h1 {
  margin: 22px 0 6px;
  font: 600 48px/1.1 -apple-system, BlinkMacSystemFont, "SF Pro Display", system-ui, sans-serif;
  letter-spacing: -0.02em;
}
.lede {
  margin: 0 auto;
  max-width: 30em;
  color: var(--muted);
  font-size: 19px;
}
.actions {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 28px;
}
.button {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 22px;
  border-radius: 12px;
  background: var(--dune-soft);
  color: var(--dune);
  font-weight: 600;
  font-size: 16px;
}
.button.primary { background: var(--dune); color: #fff; }
.button:hover { text-decoration: none; filter: brightness(1.05); }

/* Duo sections */
.duo {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px 24px;
  text-align: center;
}
.duo video {
  display: block;
  width: 100%;
  max-width: 800px;
  aspect-ratio: 4 / 3;
  margin: 0 auto;
  object-fit: contain;
  background: var(--paper);
  /* the clip's paper is flat; fade its edges into the grain */
  -webkit-mask-image: radial-gradient(ellipse 50% 50% at 50% 50%, #000 78%, transparent 100%);
  mask-image: radial-gradient(ellipse 50% 50% at 50% 50%, #000 78%, transparent 100%);
}
.duo-copy { margin-top: -12px; }
.duo.cover { padding-top: 24px; padding-bottom: 72px; }

h2 {
  margin: 0 0 6px;
  font: 600 22px/1.25 -apple-system, BlinkMacSystemFont, "SF Pro Display", system-ui, sans-serif;
  letter-spacing: -0.01em;
}
section p { margin: 0 auto; max-width: 26em; color: var(--muted); font-size: 16px; }

.pro {
  display: inline-block;
  vertical-align: 3px;
  margin-left: 4px;
  padding: 2px 8px;
  border-radius: 99px;
  background: var(--dune-soft);
  color: var(--dune);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.01em;
}

/* Features: one row each, the Duo beside its copy, alternating sides */
.features {
  max-width: 1080px;
  margin: 0 auto;
  padding: 40px 20px 16px;
  border-top: 1px solid var(--rule);
}
.features article {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  align-items: center;
  gap: 32px;
  padding: 32px 0;
}
.features article:nth-child(even) { grid-template-columns: 1.6fr 1fr; }
.features article:nth-child(even) .copy { order: 2; }
.features .copy p { margin: 0; }
.features .device { display: block; width: 100%; height: auto; }

.providers {
  display: flex;
  gap: 18px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--muted);
}
.providers li { display: flex; flex-direction: column; align-items: center; gap: 6px; }
.providers img { width: 48px; height: 48px; border-radius: 11px; box-shadow: 0 0 0 1px var(--rule); }

/* A closer look at the romaji, cropped from a capture of the same page */
.loupe { position: relative; margin: 0; }
.loupe .detail {
  position: absolute;
  right: 9%;
  bottom: 13%;
  width: 42%;
  height: auto;
  border-radius: 14px;
  border: 1px solid var(--rule);
  box-shadow: 0 14px 34px rgba(60, 45, 25, 0.26);
}

/* The recap reads at full size on wide screens; phones get the chat as its own card */
.loupe.recap .detail { display: none; }
.loupe figcaption { margin-top: 6px; font-size: 12px; color: var(--muted); text-align: center; }

/* Footer */
footer {
  padding: 32px 20px max(40px, env(safe-area-inset-bottom));
  border-top: 1px solid var(--rule);
  text-align: center;
  color: var(--muted);
  font-size: 13px;
}
footer p { margin: 0 auto 8px; max-width: 46em; }

@media (max-width: 760px) {
  .hero { padding-top: 48px; }
  h1 { font-size: 40px; }
  .lede { font-size: 17px; }
  .features article { grid-template-columns: 1fr; gap: 12px; text-align: center; padding: 24px 0; }
  .features article:nth-child(even) { grid-template-columns: 1fr; }
  .features article:nth-child(even) .copy { order: 0; }
  .features .copy p { margin: 0 auto; }
  .providers { justify-content: center; }
  .loupe .detail { width: 56%; right: 2%; bottom: 4%; }
  .loupe.recap .detail { display: block; position: static; width: 100%; margin-top: 8px; box-shadow: none; }
  .duo-copy { margin-top: -4px; }
}

@media (prefers-reduced-motion: reduce) {
  .duo video { display: none; }
  .duo::before {
    content: "";
    display: block;
    max-width: 800px;
    aspect-ratio: 4 / 3;
    margin: 0 auto;
    background: center / contain no-repeat url("assets/page-turn-poster.jpg");
  }
  .duo.cover::before { background-image: url("assets/cover-mode-poster.jpg"); }
}