@font-face {
  font-family: "Wremena";
  src: url("assets/Wremena-Regular.otf") format("opentype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

:root {
  --bg: #D6D6D6;
  --ink: #FFFFFF;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  min-height: 100%;
}

body {
  font: 400 16px/1.4 "Wremena", serif;
  -webkit-font-smoothing: antialiased;
}

button, input { font: inherit; color: inherit; }

.hero {
  height: 100vh;
  height: 100dvh;
  min-height: 100vh;
  min-height: 100dvh;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 0 4vw;
  cursor: text;
}

.type-stage {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.word {
  --fs: 140;
  --wx: 1;
  --hy: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: nowrap;
  max-width: none;
  gap: calc(var(--fs) * 0.028 * var(--wx) * 1px);
  pointer-events: none;
  position: relative;
  z-index: 1;
  user-select: none;
}

.slot {
  flex: none;
  display: flex;
  align-items: center;
  position: relative;
}

.slot.letter { gap: calc(var(--fs) * 0.02 * var(--wx) * 1px); }

.slot.space {
  width: calc(var(--fs) * 0.3 * var(--wx) * 1px);
  height: calc(var(--fs) * 0.2 * 1px);
}

.slot.gap {
  width: calc(var(--fs) * 0.18 * var(--wx) * 1px);
  height: calc(var(--fs) * 0.2 * 1px);
}

.slot.selected {
  background: rgba(255, 255, 255, 0.2);
  border-radius: 2px;
}

.dash-mark {
  display: block;
  width: calc(var(--fs) * 0.32 * var(--wx) * 1px);
  height: max(2px, calc(var(--fs) * 0.018 * 1px));
  background: var(--ink);
}

.sound-svg,
.charset-svg {
  display: block;
  fill: var(--ink);
  overflow: visible;
}

.sound-svg {
  height: calc(var(--fs) * var(--hy) * 1px);
  width: calc(var(--fs) * var(--aspect) * var(--wx) * 1px);
}

.slot.speaking .sound-svg,
.slot.speaking .sound-svg rect {
  fill: #FF2B2B;
}

.slot.speaking .dash-mark {
  background: #FF2B2B;
}

.caret {
  flex: none;
  width: 2px;
  height: calc(var(--fs) * var(--hy) * 0.62 * 1px);
  background: var(--ink);
  align-self: center;
  animation: blink 1.05s steps(1) infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

.text-input {
  position: absolute;
  left: 50%;
  top: 50%;
  width: min(92vw, 1100px);
  height: 46vh;
  transform: translate(-50%, -50%);
  opacity: 0;
  border: 0;
  padding: 0;
  margin: 0;
  background: transparent;
  color: transparent;
  caret-color: transparent;
  font-size: 16px;
  z-index: 2;
}

.text-input:focus { outline: none; }

.charset {
  width: 100%;
  max-width: none;
  margin: 0;
  padding: 12vh 12px 160px;
}

.charset-grid {
  display: grid;
  width: 100%;
  max-width: none;
  margin: 0;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 40px 18px;
  align-items: start;
}

.char-pair {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  width: 100%;
  min-width: 0;
  padding: 0;
  margin: 0;
  background: none;
  border: 0;
  color: var(--ink);
  cursor: pointer;
  user-select: none;
  text-align: center;
  transition: transform 0.15s ease;
}

.char-pair:hover { transform: scale(1.04); }

.char-pair.playing { transform: scale(1.07); }

.char-pair.playing .charset-svg,
.char-pair.playing .charset-svg rect {
  fill: #FF2B2B;
}

.char-pair.playing .base-letter {
  color: #FF2B2B;
}

.base-letter {
  font-family: "Wremena", serif;
  font-weight: 400;
  font-size: 16px;
  line-height: 1;
  color: #FFFFFF;
  text-align: center;
}

.sound-glyph {
  display: block;
  width: 100%;
  min-width: 0;
}

.charset-svg {
  width: 100%;
  height: 96px;
}

.play-fab {
  position: fixed;
  bottom: max(32px, env(safe-area-inset-bottom));
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: #000000;
  color: #FFFFFF;
  border: 0;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.play-fab:hover { transform: translateX(-50%) scale(1.05); }
.play-fab:active { transform: translateX(-50%) scale(0.97); }

.play-fab svg {
  width: 22px;
  height: 22px;
  fill: currentColor;
  display: block;
}

.play-fab .icon-play { margin-left: 3px; }
.play-fab .icon-stop { display: none; width: 16px; height: 16px; }
.play-fab.busy .icon-play { display: none; }
.play-fab.busy .icon-stop { display: block; }

@media (max-width: 640px) {
  .charset { padding: 8vh 12px 140px; }
  .charset-grid {
    gap: 28px 12px;
  }
  .charset-svg { height: 80px; }
}

@media (prefers-reduced-motion: reduce) {
  .caret { animation: none; }
  .char-pair { transition: none; }
}