:root {
  --paper: #f5f4f0;
  --white: #fff;
  --ink: #20201e;
  --muted: #696962;
  --line: #cfcec7;
  --soft: #e9e8e2;
  --row: 20px;
  --step: 26px;
  font-family:
    "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo,
    sans-serif;
  color: var(--ink);
  background: var(--paper);
  font-synthesis: none;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
}
button,
input,
select {
  font: inherit;
  color: inherit;
}
button,
select,
input[type="checkbox"],
input[type="range"] {
  cursor: pointer;
}
button {
  background: transparent;
  border: 1px solid var(--line);
  padding: 9px 15px;
  line-height: 1.4;
  transition:
    background 0.15s,
    color 0.15s;
}
button:hover {
  background: var(--soft);
}
button:disabled {
  opacity: 0.35;
  cursor: default;
}
button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
.piano-roll:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 4px;
}
button.primary,
button[aria-pressed="true"] {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}
button.primary:hover {
  background: #44443e;
}
input,
select {
  border: 1px solid var(--line);
  border-radius: 0;
  background: transparent;
  padding: 8px;
  min-height: 36px;
}
input[type="checkbox"],
input[type="range"] {
  accent-color: var(--ink);
}
input[type="checkbox"] {
  min-height: 0;
  width: 15px;
  height: 15px;
  margin: 0;
}
a {
  color: inherit;
  text-decoration: none;
}
h1,
h2,
p {
  margin: 0;
}
h2 {
  font-size: 19px;
  letter-spacing: 0.04em;
  font-weight: 600;
}
.muted {
  color: var(--muted);
  font-size: 12px;
}
.text-button {
  border: 0;
  padding: 8px 9px;
  font-size: 12px;
  white-space: nowrap;
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
[hidden] {
  display: none !important;
}
.site-header {
  height: 87px;
  margin: 0 4.5%;
  border-bottom: 1px solid var(--ink);
  display: flex;
  align-items: center;
  gap: 28px;
}
.wordmark {
  font-weight: 900;
  font-size: 25px;
  letter-spacing: -0.09em;
}
.wordmark span {
  margin-left: 3px;
}
.header-caption {
  font-size: 11px;
  letter-spacing: 0.12em;
}
.site-header > button {
  margin-left: auto;
}
main {
  margin: 0 4.5%;
}
.intro {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 47px 0 49px;
}
.eyebrow {
  font-size: 11px;
  letter-spacing: 0.18em;
  margin-bottom: 16px;
}
h1 {
  font-size: clamp(36px, 4.7vw, 70px);
  line-height: 1.2;
  letter-spacing: -0.065em;
  font-weight: 800;
}
.outline-text {
  color: transparent;
  -webkit-text-stroke: 1px var(--ink);
  margin-left: 0.16em;
}
.intro-aside {
  display: flex;
  align-items: center;
  gap: 26px;
  padding-right: 1vw;
}
.intro-aside p {
  font-size: 12px;
  line-height: 2.1;
  letter-spacing: 0.06em;
}
.sound-mark {
  width: 160px;
  height: 145px;
  transform: rotate(-5deg);
}
footer {
  display: flex;
  align-items: center;
  gap: 35px;
  padding: 36px 0 42px;
  font-size: 11px;
  color: var(--muted);
}
.footer-mark {
  color: var(--ink);
  font-size: 18px;
  font-weight: 800;
}
footer a {
  margin-left: auto;
}
.toast {
  position: fixed;
  bottom: 25px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--ink);
  color: var(--paper);
  padding: 14px 24px;
  font-size: 13px;
  z-index: 100;
  max-width: 90vw;
  box-shadow: 0 4px 20px #0002;
}
dialog {
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--ink);
  width: min(620px, 90vw);
  max-height: 85vh;
  padding: 30px;
}
dialog::backdrop {
  background: #0007;
}
.dialog-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 15px;
}
dialog ol {
  padding-left: 24px;
}
dialog li {
  padding: 12px 0;
  font-size: 14px;
}
dialog p {
  line-height: 1.9;
  font-size: 13px;
  margin-top: 6px;
}
@media (max-width: 1000px) {
  .intro-aside {
    gap: 0;
  }
  .sound-mark {
    width: 125px;
  }
  .intro-aside p {
    display: none;
  }
}
@media (max-width: 600px) {
  .site-header {
    height: 70px;
    gap: 12px;
  }
  .header-caption {
    font-size: 9px;
    max-width: 90px;
    line-height: 1.7;
  }
  .intro {
    padding: 30px 0;
  }
  .eyebrow {
    font-size: 10px;
  }
  h1 {
    font-size: 35px;
  }
  .intro-aside {
    display: none;
  }
  footer {
    gap: 16px;
    flex-wrap: wrap;
  }
  footer a {
    font-size: 10px;
  }
}