:root {
  --bg-top: #fff5f0;
  --bg-bottom: #eef6ff;
  --card: rgba(255, 255, 255, 0.92);
  --border: rgba(255, 140, 160, 0.18);
  --text: #2b3445;
  --text-soft: #5c677d;
  --accent: #ff6b8a;
  --accent-2: #4dabf7;
  --accent-3: #69db7c;
  --warn: #ff922b;
  --shadow: 0 14px 40px rgba(255, 107, 138, 0.12);
  --line: #e8edf5;
}

*, *::before, *::after {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background: linear-gradient(165deg, var(--bg-top) 0%, #fff 42%, var(--bg-bottom) 100%);
  background-attachment: fixed;
  color: var(--text);
  font-family: "Noto Sans SC", sans-serif;
  overflow-x: hidden;
}

#bgCanvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.page {
  position: relative;
  z-index: 1;
  max-width: 1080px;
  margin: 0 auto;
  padding: 1.25rem 1rem 3rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 22px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.header {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem 1.25rem;
  align-items: center;
  padding: 1.5rem 1.35rem;
  margin-bottom: 1rem;
  position: relative;
}

.header-back {
  position: absolute;
  top: 1rem;
  left: 1rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 999px;
  text-decoration: none;
  color: var(--accent);
  background: #fff0f3;
  border: 1px solid #ffd6e0;
  font-weight: 700;
  transition: transform 0.2s, box-shadow 0.2s;
}

.header-back:hover {
  transform: translateX(-2px);
  box-shadow: 0 6px 16px rgba(255, 107, 138, 0.18);
}

.site-logo {
  filter: drop-shadow(0 6px 16px rgba(255, 107, 138, 0.25));
}

.header-text {
  text-align: left;
}

.brand-title {
  font-family: "Noto Serif SC", serif;
  font-size: clamp(1.5rem, 4vw, 2.15rem);
  font-weight: 700;
  margin: 0 0 0.35rem;
  background: linear-gradient(90deg, #ff6b8a, #4dabf7);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.brand-sub {
  margin: 0;
  color: var(--text-soft);
  font-size: 0.92rem;
  line-height: 1.7;
}

.brand-sub a {
  color: #e64980;
  text-decoration: none;
  font-weight: 600;
  border-bottom: 1px dashed rgba(230, 73, 128, 0.35);
}

.brand-sub a:hover {
  color: var(--accent);
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 0.85rem;
  margin-bottom: 1rem;
}

.info-card {
  padding: 1rem 1.05rem;
  display: flex;
  gap: 0.75rem;
}

.info-card:nth-child(1) { grid-column: span 4; }
.info-card:nth-child(2) { grid-column: span 4; }
.info-card:nth-child(3) { grid-column: span 4; }

.info-icon {
  flex-shrink: 0;
  width: 42px;
  height: 42px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  font-size: 1.15rem;
}

.info-card:nth-child(1) .info-icon { background: #fff0f3; }
.info-card:nth-child(2) .info-icon { background: #e7f5ff; }
.info-card:nth-child(3) .info-icon { background: #ebfbee; }

.info-card h3 {
  margin: 0 0 0.2rem;
  font-size: 0.78rem;
  color: var(--text-soft);
  font-weight: 600;
  letter-spacing: 0.06em;
}

.info-card p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.6;
}

.info-card strong {
  color: var(--text);
}

.notice {
  padding: 0.95rem 1.1rem;
  margin-bottom: 1rem;
  border-left: 4px solid var(--accent-2);
  background: linear-gradient(90deg, rgba(77, 171, 247, 0.08), rgba(255, 255, 255, 0.7));
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--text-soft);
  border-radius: 0 18px 18px 0;
}

.notice strong {
  color: var(--text);
}

.section-panel {
  padding: 1.35rem 1.15rem 1.5rem;
  margin-bottom: 1rem;
}

.section-panel__head {
  margin-bottom: 1rem;
  text-align: center;
}

.section-panel__head h2 {
  margin: 0;
  font-family: "Noto Serif SC", serif;
  font-size: 1.15rem;
  color: var(--text);
}

.section-panel__head p {
  margin: 0.35rem 0 0;
  font-size: 0.85rem;
  color: var(--text-soft);
}

.game-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 0.85rem;
}

.game-card {
  display: block;
  padding: 1.1rem 1rem;
  border-radius: 18px;
  text-decoration: none;
  color: var(--text);
  border: 1px solid transparent;
  background: linear-gradient(135deg, #fff0f3, #fff);
  border-color: #ffd6e0;
  transition: transform 0.2s, box-shadow 0.2s;
}

.game-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(255, 107, 138, 0.14);
  text-decoration: none;
  color: var(--text);
}

.game-card__icon {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.65rem;
  background: linear-gradient(135deg, #ff6b8a, #ffa8c5);
}

.game-card__title {
  margin: 0 0 0.35rem;
  font-size: 1rem;
  font-weight: 700;
}

.game-card__desc {
  margin: 0 0 0.75rem;
  font-size: 0.82rem;
  line-height: 1.55;
  color: var(--text-soft);
}

.game-card__cta {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #fff;
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  background: linear-gradient(135deg, #ff6b8a, #ffa8c5);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 7.5rem;
  height: 2.85rem;
  padding: 0 1.4rem;
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: #fff;
  cursor: pointer;
  border: none;
  border-radius: 999px;
  background: linear-gradient(135deg, #ff6b8a, #ffa8c5);
  box-shadow: 0 10px 24px rgba(255, 107, 138, 0.28);
  transition: transform 0.2s, box-shadow 0.2s;
  font-family: inherit;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 30px rgba(255, 107, 138, 0.35);
}

.btn--ghost {
  color: var(--accent);
  background: #fff;
  border: 1px solid #ffd6e0;
  box-shadow: none;
}

.btn--ghost:hover {
  background: #fff0f3;
  box-shadow: 0 8px 20px rgba(255, 107, 138, 0.12);
}

.btn--blue {
  background: linear-gradient(135deg, #4dabf7, #74c0fc);
  box-shadow: 0 10px 24px rgba(77, 171, 247, 0.28);
}

.btn--green {
  background: linear-gradient(135deg, #69db7c, #8ce99a);
  box-shadow: 0 10px 24px rgba(105, 219, 124, 0.28);
}

.footer {
  padding: 1.25rem 1.15rem 1.35rem;
  margin-top: 1rem;
}

.footer h2 {
  margin: 0 0 0.85rem;
  font-family: "Noto Serif SC", serif;
  font-size: 1.05rem;
  color: var(--text);
}

.link-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 0.7rem;
}

.link-card {
  display: block;
  padding: 0.85rem 0.9rem;
  border-radius: 16px;
  text-decoration: none;
  color: var(--text);
  border: 1px solid transparent;
  transition: transform 0.2s, box-shadow 0.2s;
}

.link-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.06);
  text-decoration: none;
  color: var(--text);
}

.link-card .name {
  font-weight: 700;
  font-size: 0.92rem;
  margin-bottom: 0.15rem;
}

.link-card .url {
  font-size: 0.74rem;
  color: var(--text-soft);
}

.link-card.c1 { background: linear-gradient(135deg, #fff0f3, #fff); border-color: #ffd6e0; }
.link-card.c2 { background: linear-gradient(135deg, #e7f5ff, #fff); border-color: #c5e4ff; }
.link-card.c3 { background: linear-gradient(135deg, #f3f0ff, #fff); border-color: #dcd3ff; }
.link-card.c4 { background: linear-gradient(135deg, #ebfbee, #fff); border-color: #c3fae8; }
.link-card.c5 { background: linear-gradient(135deg, #fff4e6, #fff); border-color: #ffd8a8; }
.link-card.c6 { background: linear-gradient(135deg, #f8f9fa, #fff); border-color: #dee2e6; }

.footer-meta {
  margin-top: 1rem;
  padding-top: 0.95rem;
  border-top: 1px dashed #e8c4cf;
  font-size: 0.82rem;
  color: var(--text-soft);
  line-height: 1.85;
}

.footer-meta a {
  color: #1971c2;
  text-decoration: none;
}

.footer-meta a:hover {
  text-decoration: underline;
}

@media (max-width: 860px) {
  .header {
    grid-template-columns: 1fr;
    text-align: center;
    padding-top: 2.5rem;
  }

  .header-text {
    text-align: center;
  }

  .info-card:nth-child(n) {
    grid-column: span 12;
  }
}

@media (max-width: 640px) {
  .page {
    padding: 0.85rem 0.75rem 2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .btn,
  .game-card,
  .link-card,
  .header-back {
    transition: none;
  }
}