/* Pulse Tap — one stylesheet for the whole site.
   Colours are the game's own values, taken from Theme.swift and Palette.swift. */

:root {
  --bg: #151520;          /* Theme.background */
  --surface: #1e1e2a;     /* Theme.emptyTile — cards and empty tiles */
  --text: #f2f2f2;        /* Theme.ink */
  --text-2: #a0a0a0;      /* lighter than the game's secondary ink, for 4.5:1 on the web */
  --line: #2a2a38;
  --accent: #f5c74d;      /* Theme.gold — every action in the game is gold */
  --accent-ink: #151520;  /* text on a gold button */
  --tile-green: #5cb076;
  --tile-yellow: #f2c75c;
  --tile-red: #e04a59;
  --tile-blue: #6385f2;
  --radius-tile: 32%;     /* the game's 14pt corner on a 108pt tile */
  --page: 1040px;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  overflow-wrap: break-word;
}

@media (min-width: 768px) { body { font-size: 18px; } }

.wrap {
  width: 100%;
  max-width: var(--page);
  margin: 0 auto;
  padding: 0 20px;
}

/* Headings share the game's heavy, tight voice. */
h1, h2, h3, .logo, .badge, .btn {
  font-weight: 800;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(40px, 9vw, 72px); line-height: 1.05; margin: 0; }
h2 { font-size: clamp(22px, 4vw, 30px); line-height: 1.25; margin: 0 0 12px; }
h3 { font-size: 19px; margin: 0 0 6px; }
p { margin: 0 0 16px; max-width: 68ch; }
a { color: var(--accent); }
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 6px;
}

.kicker {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-2);
  margin: 0 0 8px;
}

/* Header and footer ------------------------------------------------------ */

.site-header { padding: 22px 0 8px; }

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  font-size: 16px;
  letter-spacing: 0.02em;
  color: var(--text);
  text-decoration: none;
}

.gold { color: var(--accent); }

/* The app's own icon, not a plain tile. */
.logo-mark { width: 26px; height: 26px; border-radius: 8px; }

.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 64px;
  padding: 28px 0 44px;
  color: var(--text-2);
  font-size: 15px;
}

.site-footer nav { display: flex; flex-wrap: wrap; gap: 8px 20px; margin-bottom: 12px; }
.site-footer a { display: inline-flex; align-items: center; min-height: 44px; }

/* Landing ---------------------------------------------------------------- */

.hero { padding: 24px 0 8px; text-align: center; }
.hero img { width: 128px; height: 128px; border-radius: 28px; }
.hero h1 { margin: 20px 0 12px; }

.slogan {
  font-size: clamp(18px, 4.4vw, 22px);
  color: var(--text-2);
  margin: 0 auto 28px;
  max-width: 30ch;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 26px;
  border-radius: 14px;
  background: var(--accent);
  color: var(--accent-ink);
  font-size: 16px;
  text-decoration: none;
}

.btn--soon {
  background: transparent;
  color: var(--text-2);
  border: 1px solid var(--line);
  cursor: default;
}

/* Screenshots ------------------------------------------------------------ */

.shots {
  display: flex;
  gap: 16px;
  margin: 40px 0 8px;
  padding-bottom: 8px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.shots img {
  width: 220px;
  height: auto;
  flex: 0 0 auto;
  border-radius: 20px;
  border: 1px solid var(--line);
  scroll-snap-align: center;
}

@media (min-width: 768px) {
  .shots { justify-content: center; overflow: visible; }
  .shots img { width: 260px; }
}

/* Decorative board ------------------------------------------------------- */

.board {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  width: min(280px, 72vw);
  margin: 48px auto 8px;
}

.tile {
  aspect-ratio: 1;
  border-radius: var(--radius-tile);
  background: var(--surface);
}

.tile--green { background: var(--tile-green); }
.tile--yellow { background: var(--tile-yellow); }
.tile--red { background: var(--tile-red); }
.tile--blue { background: var(--tile-blue); }

/* The colourblind shapes the game draws on its tiles: red is a circle, blue a
   cross, yellow a triangle, green a diamond. Decorative here. */
.tile--green, .tile--yellow, .tile--red, .tile--blue { position: relative; }

.tile--green::after, .tile--yellow::after, .tile--red::after, .tile--blue::after {
  content: "";
  position: absolute;
  inset: 32%;
  background: rgba(0, 0, 0, 0.28);
}

.tile--red::after { border-radius: 50%; }
.tile--green::after { clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%); }
.tile--yellow::after { clip-path: polygon(50% 0, 100% 100%, 0 100%); }
.tile--blue::after {
  clip-path: polygon(34% 0, 66% 0, 66% 34%, 100% 34%, 100% 66%, 66% 66%, 66% 100%,
                     34% 100%, 34% 66%, 0 66%, 0 34%, 34% 34%);
}

/* One tile breathes, the way the game invites a first tap. */
.tile--breathing { animation: breathe 2.4s ease-in-out infinite; }

@keyframes breathe {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.04); }
}

/* Features --------------------------------------------------------------- */

.features {
  display: grid;
  gap: 32px;
  margin: 48px 0 8px;
}

@media (min-width: 768px) {
  .features { grid-template-columns: repeat(3, 1fr); gap: 36px; }
}

.feature-tile {
  display: block;
  width: 28px;
  height: 28px;
  border-radius: 9px;
  margin-bottom: 14px;
}


/* Text pages ------------------------------------------------------------- */

.page { padding: 8px 0 0; }
.page h1 { font-size: clamp(30px, 6vw, 44px); margin-bottom: 8px; }
.page h2 { font-size: clamp(19px, 3.4vw, 24px); margin-top: 36px; }
.page ul { max-width: 68ch; padding-left: 20px; }
.page li { margin-bottom: 8px; }

.lead { color: var(--text-2); }

.fill {
  background: rgba(245, 199, 77, 0.16);
  border-bottom: 1px solid var(--accent);
  padding: 0 4px;
}

/* FAQ -------------------------------------------------------------------- */

.faq { margin-top: 12px; }

.faq details {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 4px 18px;
  margin-bottom: 12px;
}

.faq summary {
  cursor: pointer;
  font-weight: 600;
  padding: 14px 0;
  min-height: 44px;
  display: flex;
  align-items: center;
}

.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; margin-left: auto; color: var(--text-2); font-size: 22px; line-height: 1; }
.faq details[open] summary::after { content: "−"; }
.faq p:last-child { margin-bottom: 16px; }

/* 404 -------------------------------------------------------------------- */

.center { text-align: center; padding: 40px 0 0; }
.center p { margin-left: auto; margin-right: auto; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}