:root {
  color-scheme: dark;
  --ink: #f3effa;
  --muted: #b7a8d2;
  --paper: #120a1f;
  --accent: #b48cff;
  --accent-dark: #8453e6;
  --panel: transparent;
  --shadow: none;
  --radius: 24px;
  --font-title: "Archivo", system-ui, -apple-system, sans-serif;
  --font-body: "Noto Serif JP", "Times New Roman", serif;
  --border: rgba(180, 140, 255, 0.35);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  color: var(--ink);
  background: radial-gradient(circle at top left, #2e1747 0%, transparent 55%),
    radial-gradient(circle at 80% 10%, #1c0d36 0%, transparent 60%),
    linear-gradient(150deg, #0c0716 0%, #1a0f2f 45%, #120a1f 100%);
  padding: 48px 24px 64px;
  position: relative;
  overflow-x: hidden;
}

.ambient {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle at 10% 70%, rgba(180, 140, 255, 0.18), transparent 55%),
    radial-gradient(circle at 85% 65%, rgba(98, 57, 168, 0.2), transparent 50%);
  z-index: 0;
}

.hero,
.panel,
.footer {
  position: relative;
  z-index: 1;
}

.hero {
  max-width: 980px;
  margin: 0 auto 32px;
}

.eyebrow {
  font-family: var(--font-title);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.3em;
  font-size: 12px;
  margin: 0 0 16px;
  color: var(--accent-dark);
}

.hero h1 {
  font-family: var(--font-title);
  font-size: clamp(24px, 3.6vw, 40px);
  margin: 0 0 16px;
  line-height: 1.05;
}

.lede {
  max-width: 640px;
  margin: 0;
  color: var(--muted);
  font-size: 16px;
}

.panel {
  max-width: 980px;
  margin: 0 auto;
  background: var(--panel);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 32px;
  backdrop-filter: blur(4px);
}

.controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.control {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

label {
  font-family: var(--font-title);
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

select {
  font-family: var(--font-title);
  font-size: 15px;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(18, 10, 31, 0.8);
  color: var(--ink);
}

.control.info {
  justify-content: flex-end;
  align-items: flex-start;
}

.meta {
  font-family: var(--font-title);
  font-weight: 600;
  color: var(--accent-dark);
}

.issues {
  display: grid;
  gap: 16px;
}

.issue {
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: color 0.2s ease;
}

.issue:hover {
  color: var(--ink);
}

.issue .jp {
  font-size: 18px;
  margin: 0 0 8px;
}

.issue .en {
  margin: 0;
  color: #e6dcff;
  font-family: var(--font-title);
  font-size: 18px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease;
}

.issue.revealed .en {
  opacity: 1;
  visibility: visible;
}

.issue .hint {
  font-family: var(--font-title);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
}

.footer {
  max-width: 980px;
  margin: 28px auto 0;
  text-align: center;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 720px) {
  body {
    padding: 32px 18px 56px;
  }

  .controls {
    grid-template-columns: 1fr;
  }

  .panel {
    padding: 22px;
  }

  .issue .jp {
    font-size: 16px;
  }
}

@keyframes fadeSlide {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.issue {
  animation: fadeSlide 0.4s ease both;
}