/* 掘りごたつ設置ガイド（page-kotatsu-guide.php 専用） */
.kg {
  --kg-washi: #f7f2e8;
  --kg-paper: #fffdf8;
  --kg-cedar: #e3c79a;
  --kg-moss: #6c7253;
  --kg-moss-deep: #4d5340;
  --kg-walnut: #4a2a1d;
  --kg-ink: #2b2622;
  --kg-ink-soft: #6b625a;
  --kg-line: #e2d8c6;
  --kg-alert: #a3472f;
  --kg-mincho: "Shippori Mincho", "Yu Mincho", "Hiragino Mincho ProN", serif;
  background: var(--kg-washi);
  color: var(--kg-ink);
  line-height: 1.9;
  letter-spacing: 0.04em;
}
.kg img { display: block; max-width: 100%; height: auto; }

/* Hero */
.kg-hero { position: relative; min-height: 88vh; display: flex; align-items: flex-end; color: #fff; overflow: hidden; }
.kg-hero > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center 60%; }
.kg-hero::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(30,20,14,.15) 0%, rgba(30,20,14,.05) 40%, rgba(30,20,14,.78) 100%); }
.kg-hero-inner { position: relative; z-index: 1; width: 100%; max-width: 1080px; margin: 0 auto; padding: 0 24px 64px; }
.kg-eyebrow { font-size: .72rem; letter-spacing: .32em; opacity: .85; }
.kg-hero h1 { font-family: var(--kg-mincho); font-weight: 700; font-size: clamp(2.2rem, 6.4vw, 4.2rem); line-height: 1.3; letter-spacing: .12em; margin: .4em 0 .3em; }
.kg-hero p { font-size: clamp(.92rem, 2.2vw, 1.05rem); max-width: 30em; opacity: .95; }
.kg-facility { margin-top: 1.6em; font-family: var(--kg-mincho); font-size: .95rem; letter-spacing: .14em; padding-top: 1em; border-top: 1px solid rgba(255,255,255,.4); display: inline-block; }

/* Notice */
.kg-wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }
.kg-notice { margin: -36px auto 0; position: relative; z-index: 2; max-width: 760px; background: var(--kg-paper); border-left: 4px solid var(--kg-alert); box-shadow: 0 10px 30px rgba(60,40,20,.12); padding: 20px 24px; display: flex; gap: 16px; align-items: flex-start; }
.kg-notice svg { flex: none; width: 28px; height: 28px; color: var(--kg-alert); margin-top: 2px; }
.kg-notice strong { display: block; font-size: .78rem; letter-spacing: .2em; color: var(--kg-alert); }
.kg-notice span { font-weight: 500; }

/* Overview */
.kg .kg-overview { padding: 88px 0 40px; text-align: center; }
.kg-label { font-size: .72rem; letter-spacing: .36em; color: var(--kg-moss); }
.kg-overview h2 { font-family: var(--kg-mincho); font-size: clamp(1.5rem, 3.6vw, 2.1rem); letter-spacing: .14em; margin: .4em 0 1.4em; }
.kg-flow { display: grid; grid-template-columns: repeat(8, 1fr); gap: 6px; max-width: 860px; margin: 0 auto; list-style: none; }
.kg-flow a { display: flex; flex-direction: column; align-items: center; gap: 8px; text-decoration: none; color: var(--kg-ink); font-size: .74rem; line-height: 1.5; padding: 10px 4px; border-radius: 6px; transition: background .2s; }
.kg-flow a:hover { background: rgba(108,114,83,.1); }
.kg-flow b { font-family: var(--kg-mincho); width: 42px; height: 42px; border-radius: 50%; display: grid; place-items: center; border: 1px solid var(--kg-moss); color: var(--kg-moss-deep); font-size: 1.05rem; }

/* Steps */
.kg .kg-steps { padding: 40px 0; }
.kg-step { display: grid; grid-template-columns: 1.15fr 1fr; gap: 56px; align-items: center; padding: 56px 0; border-top: 1px solid var(--kg-line); scroll-margin-top: 72px; }
.kg-step:nth-child(even) .kg-photo { order: 2; }
.kg-photo { position: relative; border-radius: 4px; overflow: hidden; box-shadow: 0 14px 34px rgba(60,40,20,.14); }
.kg-photo img { aspect-ratio: 4 / 3; object-fit: cover; width: 100%; transition: transform .6s ease; }
.kg-step:hover .kg-photo img { transform: scale(1.03); }
.kg-num { font-family: var(--kg-mincho); font-size: clamp(3.4rem, 8vw, 5.4rem); line-height: 1; color: var(--kg-cedar); font-weight: 700; letter-spacing: 0; }
.kg-tag { display: inline-block; font-size: .7rem; letter-spacing: .24em; color: #fff; background: var(--kg-moss); padding: 3px 10px; border-radius: 2px; margin: 14px 0 10px; }
.kg-tag.is-ready { background: var(--kg-walnut); }
.kg-step h3 { font-family: var(--kg-mincho); font-size: clamp(1.25rem, 2.8vw, 1.6rem); line-height: 1.6; letter-spacing: .1em; font-weight: 700; }
.kg-caution { margin-top: 16px; display: inline-flex; align-items: center; gap: 8px; font-size: .88rem; color: var(--kg-alert); background: rgba(163,71,47,.08); padding: 6px 14px; border-radius: 999px; font-weight: 500; }
.kg-caution svg { width: 16px; height: 16px; flex: none; }

/* Finish */
.kg .kg-finish { background: var(--kg-moss-deep); color: #f4efe3; text-align: center; padding: 88px 24px; margin-top: 40px; }
.kg-finish .kg-label { color: var(--kg-cedar); }
.kg-finish h2 { font-family: var(--kg-mincho); font-size: clamp(1.5rem, 3.6vw, 2.1rem); letter-spacing: .14em; margin: .5em 0 .8em; }
.kg-finish p { max-width: 34em; margin: 0 auto; font-size: .98rem; }
.kg-power { margin: 40px auto 0; max-width: 560px; border: 1px solid rgba(244,239,227,.35); padding: 22px 24px; display: flex; gap: 16px; align-items: center; text-align: left; }
.kg-power svg { width: 34px; height: 34px; flex: none; color: var(--kg-cedar); }
.kg-back { display: inline-block; margin-top: 40px; color: #f4efe3; font-size: .9rem; letter-spacing: .1em; text-decoration: none; border-bottom: 1px solid rgba(244,239,227,.5); padding-bottom: 2px; }

/* Fade in */
.kg-reveal { opacity: 0; transform: translateY(24px); transition: opacity .8s ease, transform .8s ease; }
.kg-reveal.on { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .kg-reveal { opacity: 1; transform: none; transition: none; }
  .kg-photo img { transition: none; }
}

/* Mobile */
@media (max-width: 760px) {
  .kg-wrap { padding: 0 16px; }
  .kg-hero { min-height: 78vh; }
  .kg-hero-inner { padding: 0 16px 56px; }
  .kg-notice { margin: -28px 0 0; padding: 16px 18px; }
  .kg-flow { grid-template-columns: repeat(4, 1fr); row-gap: 4px; }
  .kg-step { grid-template-columns: 1fr; gap: 20px; padding: 40px 0; }
  .kg-step:nth-child(even) .kg-photo { order: 0; }
  .kg-num { font-size: 3rem; }
  .kg .kg-finish { padding: 64px 16px; }
}