/* ====================================================
   クッションの森 — シンプルテーマ
   ==================================================== */

:root {
  --bg: #FAFAF7;
  --surface: #FFFFFF;
  --text: #1A1A1A;
  --text-sub: #666;
  --accent: #FF4A1E;
  --line: #E5E2D8;

  --font: "Inter", "Helvetica Neue", "Hiragino Sans", "Yu Gothic UI", system-ui, sans-serif;

  --header-h: 60px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

/* ===== Header ============================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  max-width: 960px;
  margin: 0 auto;
  height: 100%;
  padding: 0 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.site-logo {
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  font-size: 1.05rem;
}
.site-nav {
  display: flex;
  gap: 24px;
  list-style: none;
}
.site-nav a {
  text-decoration: none;
  color: var(--text-sub);
  font-size: 0.92rem;
  transition: color 0.15s;
}
.site-nav a:hover { color: var(--accent); }

/* ===== Hero ================================================ */
.hero {
  max-width: 960px;
  margin: 0 auto;
  padding: 72px 24px 48px;
}
.hero h1 {
  font-size: clamp(1.8rem, 4.5vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.25;
  margin-bottom: 16px;
}
.hero p {
  color: var(--text-sub);
  font-size: 1rem;
  max-width: 540px;
}

/* ===== Section ============================================= */
.section {
  max-width: 960px;
  margin: 0 auto;
  padding: 32px 24px;
}
.section-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text);
}

/* ===== Cards =============================================== */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}
.card {
  display: block;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 20px;
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.15s, transform 0.15s;
}
.card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}
.card-title {
  font-weight: 700;
  font-size: 1.05rem;
  margin-bottom: 6px;
}
.card-desc {
  font-size: 0.9rem;
  color: var(--text-sub);
}
.card.soon {
  pointer-events: none;
  opacity: 0.55;
}
.card.soon .card-title::after {
  content: " · 準備中";
  color: var(--text-sub);
  font-weight: 400;
  font-size: 0.85rem;
}

/* ===== Buttons ============================================= */
.btn {
  display: inline-block;
  background: var(--text);
  color: var(--bg);
  padding: 10px 18px;
  text-decoration: none;
  border-radius: 6px;
  font-size: 0.92rem;
  font-weight: 500;
  border: 1px solid var(--text);
  transition: background 0.15s, color 0.15s;
}
.btn:hover { background: var(--accent); border-color: var(--accent); }
.btn.outline { background: transparent; color: var(--text); }
.btn.outline:hover { background: var(--text); color: var(--bg); }

/* ===== Prose (about) ======================================= */
.prose {
  max-width: 680px;
  margin: 0 auto;
  padding: 56px 24px 64px;
}
.prose h1 {
  font-size: clamp(1.6rem, 4vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}
.prose h2 {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 32px 0 10px;
}
.prose p {
  color: var(--text-sub);
  margin-bottom: 12px;
}
.prose ul {
  margin: 8px 0 16px 20px;
  color: var(--text-sub);
}
.prose li { margin-bottom: 4px; }
.prose code {
  background: var(--line);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 0.88em;
}

/* ===== Footer ============================================== */
.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 72px;
  padding: 24px;
  text-align: center;
  color: var(--text-sub);
  font-size: 0.85rem;
}

/* ===== Responsive ========================================== */
@media (max-width: 600px) {
  .header-inner { padding: 0 16px; }
  .site-nav { gap: 16px; }
  .site-nav a { font-size: 0.88rem; }
  .hero { padding: 48px 16px 32px; }
  .section { padding: 24px 16px; }
  .prose { padding: 40px 16px 48px; }
  .site-footer { margin-top: 48px; }
}