:root {
  --ink: #0a0a0f;
  --paper: #ece6d9;
  --mute: rgba(236, 230, 217, 0.48);
}

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

html, body {
  min-height: 100%;
}

body {
  background: var(--ink);
  color: var(--paper);
  font-family: "Instrument Serif", "Times New Roman", serif;
}

main {
  width: min(640px, calc(100% - 40px));
  margin: 0 auto;
  padding: 12vh 0 18vh;
}

section {
  padding: 48px 0;
  border-bottom: 1px solid rgba(236, 230, 217, 0.12);
}

section:last-child {
  border-bottom: 0;
}

.num {
  margin-bottom: 10px;
  color: var(--mute);
  font-size: 1.15rem;
  font-style: italic;
}

h1 {
  margin-bottom: 28px;
  font-size: clamp(1.6rem, 4.5vw, 2.15rem);
  font-weight: 400;
  font-style: italic;
  letter-spacing: 0.02em;
  line-height: 1.25;
}

video {
  display: block;
  width: min(100%, 360px);
  height: auto;
  max-height: 72dvh;
  background: #000;
}

audio {
  display: block;
  width: 100%;
  height: 44px;
  accent-color: var(--paper);
}

.closing {
  font-size: clamp(1.6rem, 4.5vw, 2.15rem);
  font-style: italic;
  letter-spacing: 0.02em;
  line-height: 1.3;
}

@media (max-width: 640px) {
  main {
    width: calc(100% - 32px);
    padding-top: 8vh;
  }

  video {
    width: 100%;
  }
}