/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body, h1, h2, h3, h4, p { margin: 0; }
a { color: inherit; }

/* ===== Tokens ===== */
:root {
  --ink: #1a1a1a;
  --muted: #6b6b6b;
  --line: #e3e3e3;
  --bg: #ffffff;
  --maxw: 880px;
}

body {
  font-family: "Noto Sans JP", system-ui, -apple-system, sans-serif;
  color: var(--ink);
  background: var(--bg);
  font-weight: 400;
  line-height: 1.85;
  letter-spacing: 0.02em;
  -webkit-font-smoothing: antialiased;
}

.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .7s ease, transform .7s ease;
  transition-delay: var(--delay, 0s);
}
.reveal.is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .card, .btn { transition: none !important; }
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  background: rgba(255,255,255,0.85);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-header__name {
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  text-decoration: none;
}
.site-header__links {
  display: flex;
  gap: 22px;
}
.site-header__links a {
  font-size: 0.85rem;
  font-weight: 500;
  text-decoration: none;
  color: var(--muted);
  letter-spacing: 0.06em;
  transition: color .25s ease;
}
.site-header__links a:hover { color: var(--ink); }

/* ===== Layout ===== */
main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

.sep {
  max-width: var(--maxw);
  margin: 0 auto;
  border: 0;
  border-top: 1px solid var(--line);
}

/* ===== Hero ===== */
.hero {
  text-align: center;
  padding: 88px 0 80px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}
.hero__illust {
  width: 180px;
  height: auto;
}
.hero__name {
  font-size: clamp(1.7rem, 5vw, 2.3rem);
  font-weight: 700;
  letter-spacing: 0.05em;
}
.hero__catch {
  font-size: clamp(0.95rem, 3vw, 1.15rem);
  font-weight: 400;
  color: var(--muted);
}

/* ===== Hero nav ===== */
.hero__nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 8px;
}
.hero__nav-btn {
  font-size: 0.85rem;
  font-weight: 500;
  text-decoration: none;
  padding: 8px 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  transition: border-color .25s ease, color .25s ease;
  white-space: nowrap;
}
.hero__nav-btn:hover {
  border-color: var(--ink);
  color: var(--ink);
}

/* ===== Project section ===== */
.project { padding: 80px 0; }
.project__head {
  margin-bottom: 48px;
  max-width: 640px;
}
.project__index {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--muted);
  margin-bottom: 12px;
}
.project__title {
  font-size: clamp(1.5rem, 4.5vw, 2.1rem);
  font-weight: 700;
  letter-spacing: 0.03em;
  margin-bottom: 16px;
}
.project__lead {
  font-size: clamp(0.95rem, 2.6vw, 1.05rem);
  color: var(--muted);
  line-height: 2;
  text-wrap: balance;
}

/* ===== Group (著書 / アプリ / ゲーム / 作品) ===== */
.group { margin-top: 40px; }
.group:first-of-type { margin-top: 0; }
.group__label {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--ink);
  margin-bottom: 18px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}

/* ===== Cards ===== */
.cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.card {
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 0;
  transition: border-color .3s ease, transform .3s ease;
}
.card:hover { border-color: var(--ink); transform: translateY(-3px); }
.card__thumb {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
}
.card__thumb--placeholder {
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, #f0ede8 0%, #e8e4dc 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}
.card__thumb--placeholder span {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--muted);
  letter-spacing: 0.1em;
}
.card__thumb--book {
  aspect-ratio: 3 / 4;
  object-fit: cover;
  object-position: top;
  background: #f8f8f6;
}
.card__body {
  padding: 22px 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}
.card__title {
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.6;
  letter-spacing: 0.02em;
}
.card__desc {
  font-size: 0.9rem;
  color: var(--muted);
  flex: 1;
}
.card__price {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--ink);
}
.card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 8px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 0.88rem;
  font-weight: 500;
  text-decoration: none;
  padding: 9px 18px;
  border: 1px solid var(--ink);
  border-radius: 999px;
  background: var(--ink);
  color: #fff;
  transition: opacity .25s ease, gap .25s ease;
}
.btn:hover { opacity: 0.82; gap: 11px; }
.btn--ghost {
  background: transparent;
  color: var(--ink);
}
.btn--ghost:hover { background: rgba(0,0,0,0.04); opacity: 1; }

/* ===== 開発中バッジ ===== */
.card--wip {
  position: relative;
}
.card--wip::before {
  content: "開発中";
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 1;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: #fff;
  background: #888;
  padding: 3px 10px;
  border-radius: 999px;
}

/* ===== Game list ===== */
.game-list {
  list-style: none;
  padding: 0;
  margin: 0 0 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.game-list li {
  font-size: 0.95rem;
  color: var(--ink);
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
}
.game-list li::before {
  content: "🎮 ";
}

/* ===== Podcast ===== */
.podcast {
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
}
.podcast__body {
  padding: 22px 24px 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.podcast__title {
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.6;
  letter-spacing: 0.02em;
}
.podcast__desc {
  font-size: 0.9rem;
  color: var(--muted);
}
.podcast__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 4px;
}
.podcast__player {
  display: block;
  width: 100%;
  border: 0;
  border-top: 1px solid var(--line);
}

/* ===== Project footer link ===== */
.project__more {
  margin-top: 40px;
  font-size: 0.95rem;
  font-weight: 500;
}
.project__more a {
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  padding-bottom: 3px;
  transition: border-color .3s ease;
}
.project__more a:hover { border-color: var(--ink); }

/* ===== Footer ===== */
.footer {
  border-top: 1px solid var(--line);
  text-align: center;
  padding: 56px 24px 64px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 22px;
  margin-top: 24px;
}
.footer__links {
  display: flex;
  gap: 30px;
}
.footer__links a {
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  letter-spacing: 0.06em;
  position: relative;
  padding-bottom: 2px;
}
.footer__links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%; height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .3s ease;
}
.footer__links a:hover::after { transform: scaleX(1); }
.footer__copy {
  font-size: 0.78rem;
  color: var(--muted);
  letter-spacing: 0.08em;
}

/* ===== Responsive ===== */
@media (max-width: 640px) {
  main { padding: 0 20px; }
  .hero { padding: 64px 0 56px; }
  .project { padding: 56px 0; }
  .project__head { margin-bottom: 36px; }
  .cards { grid-template-columns: 1fr; gap: 16px; }
  .card { padding: 24px 22px; }
}