:root {
  color-scheme: light;
  --paper: #f3f0e9;
  --ink: #061c2d;
  --face: #0b2b42;
  --muted: rgba(6, 28, 45, 0.72);
  --paper-glow: rgba(255, 255, 255, 0.78);
  --paper-sheen: rgba(255, 255, 255, 0.35);
  --vignette: rgba(6, 28, 45, 0.055);
  --shadow: #000;
  --serif: "Noto Serif", Georgia, "Times New Roman", serif;
  --sans: Montserrat, "Avenir Next", Futura, Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background:
    radial-gradient(circle at 48% 42%, var(--paper-glow), transparent 35%),
    linear-gradient(118deg, var(--paper-sheen), transparent 38%),
    var(--paper);
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  content: "";
  box-shadow: inset 0 0 9rem var(--vignette);
  pointer-events: none;
}

.filter-definitions {
  position: absolute;
  width: 0;
  height: 0;
}

.logo-face {
  flood-color: var(--face);
}

.shadow-fill {
  flood-color: var(--shadow);
}

.paper-fill {
  flood-color: var(--paper);
}

main {
  position: relative;
  min-height: 100vh;
  overflow: hidden;
}

.hero {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 4rem clamp(1.5rem, 5vw, 5.5rem);
}

.hero-content {
  width: min(42rem, 100%);
  text-align: center;
}

.logo-stage {
  position: relative;
  width: clamp(26rem, 44vw, 34rem);
  max-width: calc(100vw - 3rem);
  aspect-ratio: 1694 / 929;
  margin: 0 auto 1.3rem;
}

.logo-fallback {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  filter: url("#logo-inset");
}

h1 {
  margin: 0;
  color: transparent;
  background: var(--face);
  -webkit-background-clip: text;
  background-clip: text;
  font-family: var(--sans);
  font-size: clamp(2.35rem, 4.8vw, 4.4rem);
  font-weight: 500;
  letter-spacing: 0.16em;
  line-height: 0.9;
  text-transform: uppercase;
  filter: url("#text-inset");
}

h1 strong {
  display: inline-block;
  margin-top: 0.14em;
  color: transparent;
  background: var(--face);
  -webkit-background-clip: text;
  background-clip: text;
  font-size: 1.24em;
  font-weight: 800;
  letter-spacing: 0.25em;
  transform: translateX(0.12em);
}

.proposition {
  margin: 1.6rem 0 0;
  font-family: var(--sans);
  font-size: clamp(0.7rem, 1.2vw, 0.85rem);
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.intro {
  max-width: 35rem;
  margin: 1rem auto 0;
  color: var(--muted);
  font-family: var(--serif);
  font-size: clamp(0.95rem, 1.35vw, 1.08rem);
  line-height: 1.7;
}

.coming-soon {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  justify-content: center;
  margin-top: 1.8rem;
  font-family: var(--sans);
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.25em;
  text-transform: uppercase;
}

.coming-soon .rule {
  width: 2.5rem;
  height: 1px;
  background: var(--ink);
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --paper: #061c2d;
    --ink: #f3f0e9;
    --face: #f3f0e9;
    --muted: rgba(243, 240, 233, 0.72);
    --paper-glow: rgba(255, 255, 255, 0.025);
    --paper-sheen: rgba(255, 255, 255, 0.018);
    --vignette: rgba(0, 0, 0, 0.28);
    --shadow: #888;
  }
}

@media (max-width: 720px) {
  .hero {
    min-height: 100svh;
    padding: 5rem 1.5rem;
  }

  .hero-content {
    max-width: 34rem;
    margin: 0 auto;
  }

  .logo-stage {
    width: min(88vw, 28rem);
  }

  h1 {
    font-size: clamp(2.05rem, 9.5vw, 3.4rem);
  }

  .intro {
    max-width: 28rem;
    font-size: 0.95rem;
  }

}

@media (max-height: 760px) and (min-width: 721px) {
  .hero {
    padding-block: 3rem;
  }

  .logo-stage {
    width: 22rem;
    margin-bottom: 0.8rem;
  }

  h1 {
    font-size: clamp(2.2rem, 4.2vw, 3.6rem);
  }

  .proposition {
    margin-top: 1rem;
  }

  .coming-soon {
    margin-top: 1rem;
  }

}