/* ============================================================
   澤田清一 — sawadaseiichi.com
   Brand: near-black paper, crimson accent, mincho × didone serif
   ============================================================ */

:root{
  --bg:#0a0a0a;
  --bg-soft:#111110;
  --ink:#f4f1ea;          /* warm ivory */
  --ink-dim:#a8a39a;      /* muted */
  --ink-faint:#6b6760;
  --crimson:#c8102e;
  --crimson-soft:#e0354f;
  --line:rgba(244,241,234,.14);
  --line-soft:rgba(244,241,234,.08);
  --maxw:1080px;
  --serif-en:"Playfair Display", Georgia, serif;
  --body-en:"EB Garamond", Georgia, serif;
  --serif-ja:"Shippori Mincho B1", "Hiragino Mincho ProN", serif;
  --ease:cubic-bezier(.2,.7,.2,1);
}

/* ---------- bilingual switch ---------- */
html[lang="en"] .ja{display:none;}
html[lang="ja"] .en{display:none;}

*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto;}}

body{
  background:var(--bg);
  color:var(--ink);
  font-family:var(--body-en);
  font-size:18px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
html[lang="ja"] body{font-family:var(--serif-ja);line-height:1.95;}

/* faint paper grain + vignette */
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background:
    radial-gradient(120% 90% at 50% -10%, rgba(200,16,46,.06), transparent 55%),
    radial-gradient(120% 120% at 50% 120%, rgba(0,0,0,.7), transparent 60%);
}
main,header,footer{position:relative;z-index:1;}

a{color:inherit;text-decoration:none;}
em{font-style:italic;color:var(--ink);}

/* ---------- header ---------- */
.site-head{
  position:sticky;top:0;z-index:50;
  display:flex;align-items:center;justify-content:space-between;
  padding:18px clamp(20px,5vw,56px);
  background:rgba(10,10,10,.72);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line-soft);
}
.wordmark{
  font-family:var(--serif-ja);
  font-weight:600;font-size:20px;letter-spacing:.14em;
}
html[lang="en"] .wordmark{font-family:var(--serif-en);font-weight:700;letter-spacing:.18em;font-size:18px;}
.nav{display:flex;align-items:center;gap:clamp(14px,2.4vw,30px);}
.nav>a{
  font-family:var(--serif-en);font-size:13px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--ink-dim);transition:color .3s var(--ease);
}
html[lang="ja"] .nav>a{font-family:var(--serif-ja);text-transform:none;letter-spacing:.08em;font-size:14px;}
.nav>a:hover{color:var(--ink);}
@media (max-width:620px){.nav>a:not(.lang-toggle):not(#langToggle){display:none;}}

.lang-toggle{
  font-family:var(--serif-en);font-size:12px;letter-spacing:.16em;
  color:var(--ink);background:transparent;cursor:pointer;
  border:1px solid var(--line);border-radius:999px;
  padding:7px 16px;transition:all .3s var(--ease);
}
.lang-toggle:hover{border-color:var(--crimson);color:var(--crimson-soft);}

/* ---------- hero ---------- */
.hero{
  position:relative;min-height:92vh;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  text-align:center;padding:96px clamp(20px,6vw,40px) 80px;
  overflow:hidden;
}
.kanji-ghost{
  position:absolute;top:50%;left:50%;transform:translate(-50%,-46%);
  font-family:var(--serif-ja);font-weight:800;
  font-size:min(78vh,62vw);line-height:1;color:#fff;
  opacity:.035;user-select:none;z-index:0;
  animation:ghostBreath 13s ease-in-out infinite;
}
@keyframes ghostBreath{0%,100%{opacity:.03;}50%{opacity:.058;}}
@media (prefers-reduced-motion:reduce){.kanji-ghost{animation:none;}}
.hero-inner{position:relative;z-index:1;max-width:760px;}
.eyebrow{
  font-family:var(--serif-en);font-size:13px;letter-spacing:.42em;
  text-transform:uppercase;color:var(--crimson-soft);margin-bottom:30px;
}
html[lang="ja"] .eyebrow{font-family:var(--serif-ja);letter-spacing:.3em;font-size:13px;}
.hero-name{
  font-family:var(--serif-ja);font-weight:800;
  font-size:clamp(52px,11vw,118px);line-height:1.02;letter-spacing:.04em;
  margin-bottom:28px;
}
html[lang="en"] .hero-name{font-family:var(--serif-en);font-weight:900;letter-spacing:.01em;font-size:clamp(44px,9vw,96px);}
.hero-tagline{
  font-family:var(--serif-ja);font-size:clamp(19px,2.6vw,27px);
  color:var(--ink);letter-spacing:.06em;margin-bottom:22px;
  position:relative;padding-top:22px;
}
html[lang="en"] .hero-tagline{font-family:var(--serif-en);font-style:italic;font-weight:500;}
.hero-tagline::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:48px;height:1px;background:var(--crimson);
}
.hero-sub{
  max-width:560px;margin:0 auto 40px;color:var(--ink-dim);
  font-size:16px;line-height:1.85;
}
html[lang="en"] .hero-sub{font-size:17px;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-family:var(--serif-en);font-size:14px;letter-spacing:.16em;
  text-transform:uppercase;cursor:pointer;
  transition:all .35s var(--ease);
}
html[lang="ja"] .btn{font-family:var(--serif-ja);text-transform:none;letter-spacing:.1em;font-weight:600;}
.btn-primary{
  padding:15px 38px;color:var(--ink);
  border:1px solid var(--crimson);border-radius:2px;
  background:linear-gradient(var(--crimson),var(--crimson)) no-repeat;
  background-size:0% 100%;
}
.btn-primary:hover{background-size:100% 100%;color:#fff;box-shadow:0 10px 40px -12px rgba(200,16,46,.6);}

.scroll-cue{
  position:absolute;bottom:26px;left:50%;transform:translateX(-50%);
  color:var(--ink-faint);font-size:20px;z-index:1;
  animation:bob 2.4s var(--ease) infinite;
}
@keyframes bob{0%,100%{transform:translate(-50%,0);}50%{transform:translate(-50%,8px);}}
@media (prefers-reduced-motion:reduce){.scroll-cue{animation:none;}}

/* ---------- section rule / labels ---------- */
section{padding:clamp(64px,11vw,128px) clamp(20px,6vw,40px);max-width:var(--maxw);margin:0 auto;}
.section-rule{
  display:flex;align-items:center;gap:20px;
  font-family:var(--serif-en);font-size:13px;letter-spacing:.34em;
  text-transform:uppercase;color:var(--crimson-soft);margin-bottom:54px;
}
html[lang="ja"] .section-rule{font-family:var(--serif-ja);letter-spacing:.24em;text-transform:none;font-size:15px;}
.section-rule::after{
  content:"";flex:1;height:1px;background:var(--line);
  transform:scaleX(0);transform-origin:left center;
  transition:transform 1s var(--ease) .12s;
}
.section-rule.reveal{transform:translateY(8px);}
.section-rule.reveal.in{transform:none;}
.section-rule.in::after{transform:scaleX(1);}
@media (prefers-reduced-motion:reduce){.section-rule::after{transform:none;transition:none;}}

/* ---------- featured book ---------- */
.book-grid{display:grid;grid-template-columns:300px 1fr;gap:clamp(34px,6vw,72px);align-items:center;}
.book-cover img{
  width:100%;height:auto;border-radius:3px;
  box-shadow:0 30px 70px -24px rgba(0,0,0,.85), 0 0 0 1px var(--line-soft);
  transition:transform .55s var(--ease), box-shadow .55s var(--ease);
  will-change:transform;
}
.book-cover:hover img{
  transform:translateY(-8px) rotate(-.6deg);
  box-shadow:0 46px 88px -26px rgba(0,0,0,.92), 0 0 0 1px rgba(200,16,46,.32);
}
@media (prefers-reduced-motion:reduce){.book-cover:hover img{transform:none;}}

/* ---------- dual featured ---------- */
.book-divider{
  height:1px;max-width:760px;margin:clamp(54px,8vw,92px) auto 0;
  background:linear-gradient(90deg,transparent,var(--line) 18%,var(--line) 82%,transparent);
}
.book-divider + .book-grid{margin-top:clamp(54px,8vw,92px);}
@media (min-width:761px){
  .book-grid.reverse{grid-template-columns:1fr 300px;}
  .book-grid.reverse .book-cover{order:2;}
  .book-grid.reverse .book-text{order:1;}
}
.btn-soon{
  flex-direction:column;align-items:flex-start;gap:3px;
  padding:13px 22px;text-transform:none;letter-spacing:.02em;
  border:1px dashed var(--line);border-radius:3px;background:transparent;cursor:default;
}
.btn-soon .buy-store{font-family:var(--serif-en);font-size:15px;letter-spacing:.04em;color:var(--ink-dim);}
.btn-soon .buy-price{font-family:var(--body-en);font-size:13px;letter-spacing:.05em;color:var(--ink-faint);text-transform:none;}
.buy-paperback .coming{color:var(--ink-faint);font-style:italic;border:none;padding:0;}
html[lang="ja"] .buy-paperback .coming{font-style:normal;}
.buy-paperback a .arr{display:inline-block;transition:transform .3s var(--ease);}
.buy-paperback a:hover .arr{transform:translateX(4px);}
.vol-tag{
  font-family:var(--serif-en);font-size:12px;letter-spacing:.24em;
  text-transform:uppercase;color:var(--crimson-soft);margin-bottom:16px;
}
html[lang="ja"] .vol-tag{font-family:var(--serif-ja);letter-spacing:.14em;text-transform:none;}
.book-title{
  font-family:var(--serif-ja);font-weight:800;
  font-size:clamp(30px,5vw,50px);line-height:1.15;letter-spacing:.02em;margin-bottom:14px;
}
html[lang="en"] .book-title{font-family:var(--serif-en);font-weight:700;}
.book-subtitle{color:var(--ink-dim);font-size:16px;margin-bottom:24px;font-style:italic;}
html[lang="ja"] .book-subtitle{font-style:normal;}
.book-blurb{margin-bottom:30px;color:var(--ink);font-size:16.5px;}
html[lang="ja"] .book-blurb{color:#e7e3da;}

.buy-row{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:18px;}
.btn-buy{
  flex-direction:column;align-items:flex-start;gap:3px;
  padding:13px 22px;text-transform:none;letter-spacing:.02em;
  border:1px solid var(--line);border-radius:3px;background:var(--bg-soft);
}
.btn-buy:hover{border-color:var(--crimson);transform:translateY(-2px);box-shadow:0 14px 34px -18px rgba(200,16,46,.5);}
.buy-store{font-family:var(--serif-en);font-size:15px;letter-spacing:.04em;color:var(--ink);}
.buy-price{font-family:var(--body-en);font-size:13px;letter-spacing:.05em;color:var(--crimson-soft);text-transform:none;}
.buy-paperback{margin:2px 0 16px;font-size:14.5px;letter-spacing:.03em;}
html[lang="ja"] .buy-paperback{font-size:15px;}
.buy-paperback a{color:var(--ink-dim);border-bottom:1px solid var(--line);padding-bottom:3px;transition:color .3s var(--ease),border-color .3s var(--ease);}
.buy-paperback a:hover{color:var(--ink);border-color:var(--crimson);}
.buy-paperback .arr{color:var(--crimson-soft);}
.format-note{font-size:13px;letter-spacing:.08em;color:var(--ink-faint);}

/* ---------- series ---------- */
.series-intro{max-width:680px;color:var(--ink-dim);font-size:17px;margin-bottom:56px;}
.series-group{
  font-family:var(--serif-en);font-weight:500;
  font-size:clamp(20px,3vw,28px);letter-spacing:.06em;
  color:var(--ink);margin:44px 0 26px;
  display:flex;align-items:center;gap:16px;
}
html[lang="ja"] .series-group{font-family:var(--serif-ja);font-weight:600;}
.series-group::before{content:"";width:26px;height:1px;background:var(--crimson);}
.series-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(18px,3.4vw,40px);}
.vol{
  position:relative;display:flex;flex-direction:column;
  padding-bottom:6px;transition:transform .4s var(--ease);
}
.vol img{
  width:100%;height:auto;border-radius:3px;margin-bottom:16px;
  box-shadow:0 20px 50px -22px rgba(0,0,0,.8),0 0 0 1px var(--line-soft);
  transition:box-shadow .4s var(--ease),filter .4s var(--ease);
}
.vol:not(.live) img{filter:grayscale(.35) brightness(.82);}
.vol.live:hover{transform:translateY(-6px);}
.vol.live:hover img{box-shadow:0 34px 64px -22px rgba(200,16,46,.45),0 0 0 1px rgba(200,16,46,.4);}
.vol-no{
  position:absolute;top:12px;left:14px;
  font-family:var(--serif-en);font-style:italic;font-size:17px;
  color:var(--ink);text-shadow:0 2px 10px rgba(0,0,0,.8);opacity:.9;
}
.vol-badge{
  position:absolute;top:12px;right:12px;
  font-family:var(--serif-en);font-size:10px;letter-spacing:.14em;text-transform:uppercase;
  padding:4px 10px;border-radius:999px;
  background:rgba(10,10,10,.7);border:1px solid var(--line);color:var(--ink-dim);
  backdrop-filter:blur(4px);
}
html[lang="ja"] .vol-badge{font-family:var(--serif-ja);letter-spacing:.06em;text-transform:none;}
.vol-badge.live{background:var(--crimson);border-color:var(--crimson);color:#fff;}
.vol-name{
  font-family:var(--serif-ja);font-size:16px;line-height:1.5;letter-spacing:.02em;color:var(--ink);
}
html[lang="en"] .vol-name{font-family:var(--serif-en);font-size:16px;line-height:1.45;}
.vol:not(.live) .vol-name{color:var(--ink-dim);}

/* ---------- author ---------- */
.pull-quote{
  font-family:var(--serif-ja);font-size:clamp(24px,4.4vw,42px);
  line-height:1.5;letter-spacing:.03em;color:var(--ink);
  max-width:840px;margin-bottom:44px;position:relative;padding-left:28px;
}
html[lang="en"] .pull-quote{font-family:var(--serif-en);font-style:italic;font-weight:500;line-height:1.4;}
.pull-quote::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:2px;background:var(--crimson);}
.author-body{max-width:720px;}
.author-body p{margin-bottom:22px;color:#e7e3da;font-size:17px;}
.author-body p:last-child{margin-bottom:0;}

/* ---------- footer ---------- */
.site-foot{border-top:1px solid var(--line-soft);padding:clamp(56px,9vw,90px) clamp(20px,6vw,40px);background:var(--bg-soft);}
.foot-inner{max-width:var(--maxw);margin:0 auto;text-align:center;}
.foot-mark{font-family:var(--serif-ja);font-size:22px;letter-spacing:.1em;margin-bottom:12px;}
.foot-mark .dot{color:var(--crimson);margin:0 8px;}
.foot-tag{color:var(--ink-dim);font-size:15px;margin-bottom:30px;}
html[lang="en"] .foot-tag{font-style:italic;}
.foot-links{display:flex;flex-wrap:wrap;justify-content:center;gap:clamp(16px,3vw,34px);margin-bottom:34px;}
.foot-links a{
  font-family:var(--serif-en);font-size:13px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--ink-dim);padding-bottom:3px;border-bottom:1px solid transparent;transition:all .3s var(--ease);
}
html[lang="ja"] .foot-links a{font-family:var(--serif-ja);text-transform:none;letter-spacing:.06em;font-size:14px;}
.foot-links a:hover{color:var(--crimson-soft);border-color:var(--crimson);}
.foot-copy{font-family:var(--serif-en);font-size:12px;letter-spacing:.1em;color:var(--ink-faint);}

/* ---------- email subscribe ---------- */
.foot-sub{margin:0 auto 30px;max-width:420px;}
.foot-sub-label{font-family:var(--serif-ja);font-size:14px;letter-spacing:.06em;color:var(--ink-dim);margin:0 0 14px;}
html[lang="en"] .foot-sub-label{font-family:var(--serif-en);font-size:13px;letter-spacing:.04em;}
.foot-sub-row{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;}
.foot-sub-input{flex:1 1 220px;min-width:0;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.16);border-radius:3px;padding:11px 14px;color:#f3efe6;font-family:var(--serif-en);font-size:14px;letter-spacing:.02em;transition:border-color .25s var(--ease),background .25s var(--ease);}
.foot-sub-input::placeholder{color:var(--ink-faint);}
.foot-sub-input:focus{outline:none;border-color:var(--crimson);background:rgba(200,16,46,.06);}
.foot-sub-hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0;}
.foot-sub-btn{flex:0 0 auto;background:var(--crimson,#C8102E);border:1px solid var(--crimson,#C8102E);color:#fff;font-size:13px;letter-spacing:.1em;padding:11px 24px;border-radius:3px;cursor:pointer;transition:all .25s var(--ease);}
html[lang="ja"] .foot-sub-btn{font-family:var(--serif-ja);letter-spacing:.14em;}
.foot-sub-btn:hover{background:#a50d26;border-color:#a50d26;}
.foot-sub-btn:disabled{opacity:.5;cursor:default;}
.foot-sub-note{font-family:var(--serif-en);font-size:11px;letter-spacing:.04em;color:var(--ink-faint);margin:12px 0 0;}
html[lang="ja"] .foot-sub-note{font-family:var(--serif-ja);}
.foot-sub-msg{font-size:12.5px;letter-spacing:.03em;margin:10px 0 0;min-height:1em;}
html[lang="ja"] .foot-sub-msg{font-family:var(--serif-ja);}
.foot-sub-msg.is-ok{color:#7fae86;}
.foot-sub-msg.is-err{color:var(--crimson-soft,#e0566a);}

/* ---------- reveal animation ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .9s var(--ease),transform .9s var(--ease);}
.reveal.in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none;}}

/* staggered children (block itself stays put, children rise in sequence) */
.reveal.reveal-stagger{opacity:1;transform:none;transition:none;}
.reveal-stagger>*{opacity:0;transform:translateY(18px);transition:opacity .85s var(--ease),transform .85s var(--ease);}
.reveal-stagger.in>*{opacity:1;transform:none;}
.reveal-stagger.in>*:nth-child(1){transition-delay:.05s;}
.reveal-stagger.in>*:nth-child(2){transition-delay:.14s;}
.reveal-stagger.in>*:nth-child(3){transition-delay:.23s;}
.reveal-stagger.in>*:nth-child(4){transition-delay:.32s;}
.reveal-stagger.in>*:nth-child(5){transition-delay:.41s;}
.reveal-stagger.in>*:nth-child(6){transition-delay:.50s;}
@media (prefers-reduced-motion:reduce){.reveal-stagger>*{opacity:1;transform:none;transition:none;}}

/* ---------- responsive ---------- */
@media (max-width:760px){
  body{font-size:17px;}
  .book-grid{grid-template-columns:1fr;gap:30px;justify-items:center;text-align:center;}
  .book-cover{max-width:240px;}
  .buy-row{justify-content:center;}
  .pull-quote{padding-left:20px;}
  .section-rule{margin-bottom:40px;}
}
@media (max-width:540px){
  .series-grid{grid-template-columns:1fr 1fr;gap:16px;}
  .vol-name{font-size:14px;}
  .hero{min-height:88vh;}
}

/* ---------- promo band (date-gated by app.js) ---------- */
.promo-band{
  display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:8px 16px;
  padding:12px clamp(20px,5vw,56px);
  background:linear-gradient(90deg,rgba(200,16,46,.10),rgba(200,16,46,.24),rgba(200,16,46,.10));
  border-bottom:1px solid rgba(200,16,46,.40);
  font-size:14px;letter-spacing:.06em;line-height:1.6;text-align:center;color:var(--ink);
  transition:background .3s var(--ease);
}
.promo-band[hidden]{display:none;}
.promo-band:hover{background:linear-gradient(90deg,rgba(200,16,46,.16),rgba(200,16,46,.34),rgba(200,16,46,.16));}
.promo-tag{font-size:11px;letter-spacing:.2em;padding:2px 10px;border:1px solid var(--crimson-soft);color:var(--crimson-soft);}
.promo-cta{color:var(--crimson-soft);white-space:nowrap;}