@charset "UTF-8";
@import url('https://fonts.googleapis.com/css2?family=Courgette&display=swap');

:root {
  --ink: #251c17;
  --paper: #fffaf2;
  --card: #ffffff;
  --accent: #8b5e3c;
  --accent-dark: #4b2f22;
  --line: #e5d8c8;
  --shadow: 0 10px 30px rgba(34, 24, 18, 0.14);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Hiragino Kaku Gothic ProN", "Meiryo", system-ui, -apple-system, sans-serif;
  color: var(--ink);
  background: linear-gradient(180deg, #f7efe5 0%, #efe0cf 100%);
}

.app-hero {
  min-height: 280px;
  background-image: linear-gradient(rgba(37, 28, 23, 0.35), rgba(37, 28, 23, 0.65)), url("atticroom.png");
  background-position: center;
  background-size: cover;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 32px 18px;
}

.hero-overlay {
  width: min(680px, 100%);
  color: #fff;
  text-shadow: 0 2px 10px rgba(0,0,0,0.35);
}

.series {
  margin: 0 0 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.8rem;
}

h1 {
  margin: 0;
  font-family: Courgette, Georgia, serif;
  font-size: clamp(2.5rem, 12vw, 4.6rem);
  line-height: 0.95;
}

h1 span {
  font-size: clamp(2rem, 9vw, 3.6rem);
}

.subtitle {
  margin: 18px auto 22px;
  line-height: 1.6;
  font-size: 1rem;
}

.language-button,
.shop-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 18px;
  border-radius: 999px;
  background: #ffffff;
  color: var(--accent-dark);
  text-decoration: none;
  font-weight: 700;
  box-shadow: var(--shadow);
}

.app-shell {
  width: min(980px, 100%);
  margin: -34px auto 0;
  padding: 0 14px 28px;
}

.card-section,
.install-note {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 18px;
  margin: 18px 0;
  box-shadow: var(--shadow);
}

.card-section h2,
.install-note h2 {
  margin: 0 0 16px;
  font-size: 1.2rem;
  color: var(--accent-dark);
}

.topbar {
  text-align: center;
  margin: 20px 0;
}

#installButton {
  display: none;
  padding: 14px 24px;
  border-radius: 16px;
  border: none;
  background: #4b2f22;
  color: white;
  font-size: 16px;
  font-weight: bold;
  box-shadow: 0 6px 18px rgba(0,0,0,0.25);
}

.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.app-card {
  display: block;
  padding: 16px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink);
  text-decoration: none;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.app-card:hover,
.app-card:focus {
  transform: translateY(-2px);
  box-shadow: 0 8px 18px rgba(34, 24, 18, 0.14);
}

.app-card strong {
  display: block;
  margin: 6px 0;
  font-size: 1.1rem;
}

.app-card small {
  display: block;
  line-height: 1.5;
  color: #65564b;
}

.card-label {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  background: #f2e6d8;
  color: var(--accent-dark);
  font-size: 0.75rem;
  font-weight: 700;
}

.app-card.highlight {
  background: linear-gradient(135deg, #fffdf8, #f0dfcc);
}

.download-list,
.link-panel {
  display: grid;
  gap: 10px;
}

.download-list h3 {
  margin: 10px 0 0;
  font-size: 1rem;
  color: var(--accent-dark);
}

.download-list a,
.link-panel a {
  display: block;
  padding: 14px 16px;
  min-height: 48px;
  border-radius: 14px;
  background: #fff;
  border: 1px solid var(--line);
  color: var(--ink);
  text-decoration: none;
  line-height: 1.4;
}

.download-list a::after,
.link-panel a:not(.shop-button)::after {
  content: "  ›";
  color: var(--accent);
  font-weight: 700;
}

.mail-image {
  margin: 0;
  text-align: center;
}

.mail-image img {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
}

.shop-button {
  background: var(--accent-dark);
  color: #fff;
}

.install-note p {
  margin: 0;
  line-height: 1.7;
}

footer {
  padding: 22px 14px;
  text-align: center;
  color: #fff;
  background: linear-gradient(135deg, #2b1c15, #6d472f);
}

footer p { margin: 0; line-height: 1.7; }
footer a { color: #fff4dc; }

@media (min-width: 720px) {
  .app-hero { min-height: 360px; }
  .app-shell { padding-inline: 24px; }
  .card-section,
  .install-note { padding: 24px; }
  .card-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 960px) {
  .card-grid { grid-template-columns: repeat(3, 1fr); }
}