* {
  box-sizing: border-box;
}

:root {
  --page: #ffffff;
  --text: #161616;
  --muted: #5f5f5f;
  --line: rgba(0, 0, 0, 0.08);
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  background: #ffffff;
  color: var(--text);
  font-family: "Sora", sans-serif;
}

.stage {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: clamp(1rem, 3vw, 2rem);
}

.hero {
  width: min(100%, 1080px);
  display: grid;
  justify-items: center;
  gap: 0.2rem;
}

.mark-shell {
  width: min(100vw, 1040px, 85vh);
  overflow: hidden;
  display: grid;
  place-items: center;
}

.mark {
  display: block;
  width: min(100vw, 1040px, 85vh);
  height: auto;
  background: #ffffff;
}

.copy-block {
  width: min(100%, 760px);
  text-align: center;
  margin-top: 1rem;
}

h1 {
  margin: 0;
  font-size: clamp(0.82rem, 1.15vw, 1rem);
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--muted);
  font-style: italic;
}

.nav-row {
  margin-top: 1.6rem;
  text-align: center;
  font-size: clamp(0.78rem, 0.95vw, 0.9rem);
  color: var(--muted);
  letter-spacing: 0.02em;
}

.nav-row a {
  color: inherit;
  text-decoration: none;
  padding: 0 0.2rem;
  border-bottom: 1px solid transparent;
  transition: border-color 150ms ease, color 150ms ease;
}

.nav-row a:hover,
.nav-row a:focus-visible {
  color: var(--text);
  border-bottom-color: var(--text);
}

.nav-row .sep {
  margin: 0 0.5em;
  opacity: 0.5;
}

.page-title {
  margin: 0 0 0.6rem;
  font-size: clamp(1.4rem, 2.4vw, 1.9rem);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-body {
  margin: 0;
  font-size: clamp(0.95rem, 1.2vw, 1.05rem);
  color: var(--muted);
  font-style: italic;
}

.copy-block::before {
  content: "";
  display: block;
  width: 3rem;
  height: 1px;
  margin: 0 auto 0.9rem;
  background: var(--line);
}

.contact-line {
  margin: 0;
  font-size: clamp(0.95rem, 1.2vw, 1.05rem);
  color: var(--text);
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
}

.contact-link {
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: border-color 150ms ease;
}

.contact-link:hover,
.contact-link:focus-visible {
  border-bottom-color: var(--text);
}

.copy-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.9rem;
  height: 1.9rem;
  padding: 0;
  background: transparent;
  border: none;
  border-radius: 6px;
  color: var(--muted);
  cursor: pointer;
  transition: color 150ms ease, background 150ms ease;
}

.copy-btn:hover,
.copy-btn:focus-visible {
  color: var(--text);
  background: rgba(0, 0, 0, 0.04);
  outline: none;
}

.copy-btn .check-icon {
  display: none;
}

.copy-btn.is-copied {
  color: var(--text);
}

.copy-btn.is-copied .copy-icon {
  display: none;
}

.copy-btn.is-copied .check-icon {
  display: block;
}

@media (max-width: 640px) {
  .mark-shell,
  .mark {
    width: min(100vw, 760px, 85vh);
  }
}