/* ==========================================================================
   SURIMA — Decorasi riichi
   A restrained decoration layer over the Sura & Baya world. Brass yaku
   nameplates and wind discs mark each section, a single 1,000-point tenbou
   lies between chapters, tiles drift across the hero bands, a hand of tiles
   scrolls on the home page, and CTAs carry a pair of dice and the dealer mark.

   Everything here is opt-in: it only renders when `decor.js` adds `.decor-on`
   to <body>, so deleting the two linked files restores the original site.
   Palette, edges, and type are inherited from styles.css (the source of truth).
   ========================================================================== */

:root {
  --d-tw: 30px;               /* tile width; height derives at 112/149 */
  --d-kanji: "Noto Serif CJK JP", "Noto Sans CJK JP", "Hiragino Mincho ProN",
             "Yu Mincho", "MS Mincho", "Songti SC", serif;
}

/* A single tile face: the public-domain FluffyStuff riichi set (assets/tiles/). */
.d-tile {
  position: relative;
  display: inline-block;
  width: var(--d-tw);
  aspect-ratio: 112 / 149;
  flex: 0 0 auto;
  vertical-align: middle;
}
.d-tile img { width: 100%; height: 100%; display: block; object-fit: contain; }

/* Kanji helper: forces a serif CJK stack so glyphs match the carved world. */
.d-kanji {
  font-family: var(--d-kanji);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
}

/* =========================== Section accessories ========================== */
.d-section { position: relative; }

.d-corner {
  position: absolute;
  top: 16px;
  z-index: 4;
  display: flex;
  align-items: center;
  gap: 10px;
}
.d-corner--tl { left: 16px; }
.d-corner--tr { right: 16px; }

/* Brass nameplate carrying a yaku. */
.d-nameplate {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  background: var(--brass);
  color: #241d0e;
  border: var(--edge) solid var(--ink);
  padding: 6px 11px 7px;
  font-size: 0.62rem;
  font-weight: 800;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  box-shadow: 3px 3px 0 rgba(34, 48, 42, 0.18);
}
.d-nameplate .d-kanji {
  font-size: 1rem;
  letter-spacing: 0.06em;
  text-transform: none;
}
.d-nameplate small {
  display: block;
  font-size: 0.56rem;
  letter-spacing: 0.26em;
  opacity: 0.78;
}

/* Wind disc: square-cut seat marker. */
.d-wind {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border: var(--edge) solid var(--ink);
  background: var(--green);
  color: var(--paper);
  font-size: 1.18rem;
  box-shadow: 3px 3px 0 rgba(34, 48, 42, 0.18);
}
.d-wind.e { background: var(--green); }
.d-wind.s { background: var(--brick); }
.d-wind.w { background: var(--brass); color: #241d0e; }
.d-wind.n { background: var(--river); }

/* Dark page heroes anchor the floating tiles and invert the nameplate. */
.d-hero-decor { position: relative; overflow: hidden; }
.d-hero-decor .d-nameplate { background: var(--paper); color: var(--ink); }
.d-hero-decor .d-corner { top: 20px; }
.d-hero-decor .d-float .d-tile { filter: drop-shadow(0 6px 10px rgba(0, 0, 0, 0.28)); }

@media (max-width: 1260px) {
  .d-corner { display: none; }
}

/* Tinted bands pick up a faint tile-outline weave, like a rack of tiles. */
.decor-on .section-tinted {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='54' height='66'%3E%3Crect x='9' y='9' width='30' height='40' rx='3' fill='none' stroke='%2322302a' stroke-opacity='.05'/%3E%3C/svg%3E");
  background-size: 54px 66px;
}

/* ================================ Dividers ================================ */
/* A single 1,000-point tenbou, laid flat, marking the line between chapters. */
.d-divider {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(14px, 3vw, 30px);
  padding: 30px 24px 26px;
  overflow: hidden;
}
.d-divider .d-rule {
  flex: 1 1 60px;
  max-width: 300px;
  height: 2px;
  background: repeating-linear-gradient(90deg, var(--line) 0 8px, transparent 8px 15px);
}

/* Point stick (tenbou): cream body, the dots carry the value. */
.d-tenbou { display: inline-flex; }
.d-tb-stick {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 3px;
  width: 15px;
  height: 58px;
  background: var(--paper);
  border: 1.5px solid var(--ink);
  border-radius: 7px;
  box-shadow: 0 2px 0 rgba(34, 48, 42, 0.16);
}
.d-tb-line { display: flex; justify-content: center; gap: 3px; }
.d-tb-dot {
  display: block;
  width: 3.6px;
  height: 3.6px;
  border-radius: 50%;
}
.d-tb-dot.k { background: var(--ink); }
.d-tb-dot.r { background: var(--brick); }

/* Laid on its side for the chapter divider. */
.d-tenbou--flat .d-tb-stick { flex-direction: row; width: 62px; height: 14px; }

/* ============================== Floating tiles ============================ */
/* Tiles drift across the hero / river bands. */
.d-float {
  position: absolute;
  z-index: 0;
  pointer-events: none;
  opacity: 0.92;
}

/* Keep floating ornament behind page copy. */
.d-hero-decor > .container,
.hero > .container,
.hero > .scene-stage { position: relative; z-index: 2; }

.d-float .d-tile { animation: d-drift var(--dur, 9s) ease-in-out infinite; }

@keyframes d-drift {
  0%, 100% { transform: translate3d(0, 0, 0) rotate(var(--rot, 0deg)); }
  50%      { transform: translate3d(var(--dx, 8px), var(--dy, -12px), 0) rotate(calc(var(--rot, 0deg) + 6deg)); }
}

/* ================================ Marquee ================================= */
/* A scrolling hand of tiles and yaku names. Home page only. */
.d-marquee {
  position: relative;
  overflow: hidden;
  background: var(--green-deep);
  border-top: var(--edge) solid var(--ink);
  border-bottom: var(--edge) solid var(--ink);
  padding: 12px 0;
}
.d-marquee-track {
  display: flex;
  align-items: center;
  gap: 26px;
  width: max-content;
  animation: d-scroll 46s linear infinite;
}
.d-marquee:hover .d-marquee-track { animation-play-state: paused; }
.d-marquee .d-tile { --d-tw: 26px; }
.d-marquee .d-word {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--paper);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  white-space: nowrap;
}
.d-marquee .d-word .d-kanji { font-size: 1.05rem; color: var(--brass); letter-spacing: 0.08em; }
.d-marquee .d-sep { width: 1px; height: 26px; background: rgba(244, 234, 214, 0.28); }

@keyframes d-scroll {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* ============================== CTA dressing ============================== */
.d-cta-deco { position: relative; }
.d-dice {
  position: absolute;
  right: 16px;
  bottom: -16px;
  display: flex;
  gap: 6px;
  z-index: 2;
}
.d-die svg { width: 32px; height: 32px; display: block; }
.d-oya {
  position: absolute;
  left: 16px;
  top: -14px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--brick);
  color: var(--paper);
  border: var(--edge) solid var(--ink);
  padding: 4px 9px 5px;
  font-size: 0.56rem;
  font-weight: 800;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  box-shadow: 3px 3px 0 rgba(34, 48, 42, 0.18);
}
.d-oya .d-kanji { font-size: 0.95rem; letter-spacing: 0; }
@media (max-width: 700px) { .d-cta-deco .d-dice, .d-cta-deco .d-oya { display: none; } }

/* =========================== Browser surfaces ============================= */
/* The parts we did not draw still carry the world. */
.decor-on ::-webkit-scrollbar { width: 14px; height: 14px; }
.decor-on ::-webkit-scrollbar-track { background: var(--stone-deep); }
.decor-on ::-webkit-scrollbar-thumb {
  background: var(--green);
  border: 3px solid var(--stone-deep);
}
.decor-on ::-webkit-scrollbar-thumb:hover { background: var(--brick); }

.decor-on ol > li::marker { color: var(--brick); font-weight: 800; }
.decor-on ul > li::marker { color: var(--brass-deep); }

/* Active nav link carries a dealer pip. */
.decor-on .nav-links a[aria-current="page"]::after {
  content: "";
  display: inline-block;
  width: 5px; height: 5px;
  margin-left: 7px;
  vertical-align: middle;
  border-radius: 50%;
  background: var(--brass);
}

/* =============================== Responsive =============================== */
@media (max-width: 760px) {
  :root { --d-tw: 26px; }
  .d-divider { padding: 22px 16px 20px; }
  .d-nameplate small { display: none; }
}

@media (max-width: 620px) {
  /* Floating tiles have nowhere to land on small screens: drop them. */
  .d-float { display: none; }
}

@media (max-width: 520px) {
  :root { --d-tw: 22px; }
}

/* ============================= Reduced motion ============================= */
@media (prefers-reduced-motion: reduce) {
  .d-float .d-tile,
  .d-marquee-track {
    animation: none !important;
  }
}