/* ═══════════════════════════════════════════════════════════
   間 MA — paper & ink, kyoto
   washi #F5F1E8 · sumi #1C1A17 · vermillion #C73E2E (once per view)
   ═══════════════════════════════════════════════════════════ */

:root {
  --washi: #F5F1E8;
  --sumi: #1C1A17;
  --ink-soft: #57514A;
  --ink-faint: #6E675E;
  --vermillion: #C73E2E;
  /* same ink, darkened for the one place vermillion carries meaning as
     small text (season toggle) rather than sitting on a seal — #C73E2E
     reads 4.48:1 on washi, just under AA's 4.5:1 for sub-large text. */
  --vermillion-text: #A9331F;
  --ease-slow: cubic-bezier(.22, .08, .14, 1);
  --ease-draw: cubic-bezier(.65, .01, .22, 1);
  --ease-stamp: cubic-bezier(.3, 1.4, .45, 1);
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--washi);
  color: var(--sumi);
  font-family: 'Zen Kaku Gothic New', sans-serif;
  font-weight: 300;
  line-height: 1.9;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

.jp, [lang="ja"] { font-family: 'Noto Serif JP', serif; }

::selection { background: rgba(199, 62, 46, .16); }

a { color: inherit; }

:focus-visible {
  outline: 1.5px solid var(--sumi);
  outline-offset: 5px;
  border-radius: 2px;
}

/* ── paper grain ─────────────────────────────────────────── */
.grain {
  position: fixed;
  inset: -10%;
  pointer-events: none;
  z-index: 40;
  opacity: .05;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='240' height='240' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ── self-drawing strokes (shared) ───────────────────────── */
path[data-draw] {
  transition: stroke-dashoffset var(--dur, 2200ms) var(--ease-draw) var(--delay, 0ms);
}
.drawn path[data-draw] { stroke-dashoffset: 0 !important; }

/* ── hero ────────────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: grid;
  grid-template-rows: 1fr auto 1fr;
  justify-items: center;
  align-items: center;
  padding: 0 6vw;
}

.topbar {
  position: absolute;
  top: 0; left: 0; right: 0;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 2.2rem clamp(1.4rem, 5vw, 4rem);
}
.wordmark {
  font-size: 1.25rem;
  font-weight: 400;
  letter-spacing: 0;
}
.topbar-right {
  font-size: .68rem;
  letter-spacing: .34em;
  color: var(--ink-soft);
  text-transform: uppercase;
}
.topbar-right .jp { font-size: .78rem; letter-spacing: .28em; }
.dot-sep { margin: 0 .7em 0 .4em; }

.hero-vertical {
  position: absolute;
  top: 50%;
  right: clamp(1.3rem, 4.5vw, 3.6rem);
  transform: translateY(-50%);
  writing-mode: vertical-rl;
  font-size: clamp(.78rem, 1vw, .92rem);
  font-weight: 300;
  letter-spacing: .52em;
  color: var(--ink-soft);
}
.seal-dot {
  display: inline-block;
  inline-size: 8px;
  block-size: 8px;
  margin-block-start: 1.6em;
  background: var(--vermillion);
  border-radius: 1.5px;
}

.hero-art {
  grid-row: 2;
  position: relative;
  width: min(760px, 86vw);
  display: grid;
  grid-template-rows: auto auto;
  row-gap: clamp(1.2rem, 4.4vh, 2.7rem);
  justify-items: center;
  align-items: center;
}
.ink-wash {
  position: absolute;
  inset: 0;
  margin: auto;
  width: 130%;
  aspect-ratio: 1.5;
  background: radial-gradient(50% 50% at 50% 50%, rgba(28, 26, 23, .055), transparent 70%);
  filter: blur(2px);
  animation: wash-drift 42s var(--ease-slow) infinite alternate;
  pointer-events: none;
}
@keyframes wash-drift {
  from { transform: translate(-4%, -2%) scale(1); }
  to   { transform: translate(4%, 3%) scale(1.12); }
}
.stroke-svg { grid-row: 2; width: 100%; height: auto; display: block; }
.drawn .ink-bleed {
  animation: ink-breathe 12.5s ease-in-out 5200ms infinite;
  transform-origin: 50% 50%;
}
@keyframes ink-breathe {
  0%, 100% { opacity: .13; }
  50% { opacity: .21; }
}

.hero-char {
  grid-row: 1;
  position: relative;
  font-size: clamp(6.6rem, 17vw, 13.4rem);
  font-weight: 300;
  line-height: 1;
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 1800ms var(--ease-slow) 2300ms, transform 1800ms var(--ease-slow) 2300ms;
}
.drawn .hero-char {
  opacity: 1;
  transform: none;
  animation: breath 9s ease-in-out 4600ms infinite;
}
@keyframes breath {
  0%, 100% { opacity: 1; }
  50% { opacity: .86; }
}

.hero-copy {
  grid-row: 3;
  align-self: start;
  text-align: center;
  margin-top: clamp(1.4rem, 4vh, 3rem);
}
.hero-ma {
  font-size: .82rem;
  letter-spacing: .58em;
  text-indent: .58em;
  color: var(--sumi);
  font-weight: 400;
}
.hero-reading {
  display: block;
  margin-top: .5rem;
  font-size: .66rem;
  letter-spacing: .3em;
  color: var(--ink-faint);
  font-style: normal;
}
.hero-line {
  margin-top: 1.5rem;
  font-size: clamp(.86rem, 1.05vw, .95rem);
  color: var(--ink-soft);
  letter-spacing: .06em;
}

.cue {
  position: absolute;
  bottom: 4.5vh;
  left: 50%;
  width: 1px;
  height: 54px;
  overflow: hidden;
}
.cue span {
  position: absolute;
  inset: 0;
  background: linear-gradient(var(--sumi), rgba(28, 26, 23, .15));
  transform: translateY(-100%);
  animation: cue-fall 3.8s var(--ease-slow) infinite;
}
@keyframes cue-fall {
  0%   { transform: translateY(-100%); }
  55%  { transform: translateY(0); }
  100% { transform: translateY(102%); }
}

/* ── sections: radical whitespace ────────────────────────── */
.sec {
  position: relative;
  min-height: 150vh;
  display: grid;
  place-items: center;
  padding: 26vh 8vw;
}

.piece {
  position: relative;
  max-width: 34rem;
  text-align: center;
}

.sec-label {
  position: absolute;
  top: -8rem;
  right: -16%;
  writing-mode: vertical-rl;
  font-size: clamp(1.05rem, 1.6vw, 1.3rem);
  font-weight: 300;
  letter-spacing: .5em;
  color: var(--sumi);
  white-space: nowrap;
}
.sec-num {
  display: block;
  font-size: .68rem;
  letter-spacing: .4em;
  color: var(--ink-faint);
  margin-block-end: 1.6em;
}

/* scroll-linked parallax: the numeral heading drifts at its own pace
   as the section passes through view — pure progressive enhancement,
   composes with .reveal's `transform` since `translate` is a separate
   CSS property. Falls back to static (no motion) where unsupported. */
@supports (animation-timeline: view()) {
  .sec-label {
    animation: label-drift linear both;
    animation-timeline: view();
    animation-range: entry 0% cover 55%;
  }
  @keyframes label-drift {
    from { translate: 0 34px; }
    to   { translate: 0 -14px; }
  }
}

.koan {
  font-size: clamp(1.02rem, 1.5vw, 1.22rem);
  font-weight: 300;
  letter-spacing: .14em;
  line-height: 2.3;
}
.koan-en {
  margin-top: 2.2rem;
  font-size: clamp(.85rem, 1vw, .93rem);
  color: var(--ink-soft);
  letter-spacing: .05em;
}
.aside {
  margin-top: 3.4rem;
  font-size: .8rem;
  color: var(--ink-faint);
  letter-spacing: .05em;
}
.aside .jp { font-size: .85rem; letter-spacing: .12em; }

/* reveals */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 1600ms var(--ease-slow) var(--d, 0ms),
              transform 1600ms var(--ease-slow) var(--d, 0ms);
}
.inview .reveal, .reveal.inview {
  opacity: 1;
  transform: none;
}

/* ── stone ───────────────────────────────────────────────── */
.stone {
  width: clamp(96px, 11vw, 138px);
  aspect-ratio: 1 / .82;
  margin: 0 auto 4.5rem;
  background: radial-gradient(circle at 36% 28%, #4A443B, #26221D 72%);
  border-radius: 46% 54% 52% 48% / 56% 48% 52% 44%;
  position: relative;
  animation: stone-morph 16s ease-in-out infinite alternate;
  transition: transform 1100ms var(--ease-slow);
}
.stone:hover { transform: scale(1.045); }
.stone::after {
  content: "";
  position: absolute;
  left: 6%;
  bottom: -16%;
  width: 88%;
  height: 22%;
  background: radial-gradient(50% 50% at 50% 50%, rgba(28, 26, 23, .22), transparent 70%);
  border-radius: 50%;
}
@keyframes stone-morph {
  0%   { border-radius: 46% 54% 52% 48% / 56% 48% 52% 44%; }
  50%  { border-radius: 52% 48% 46% 54% / 50% 54% 46% 50%; }
  100% { border-radius: 48% 52% 56% 44% / 52% 46% 54% 48%; }
}

/* ── seasons ─────────────────────────────────────────────── */
.sec-seasons { overflow: hidden; }
.season-pool {
  position: absolute;
  inset: 0;
  background: #EFDCD3;
  -webkit-mask-image: radial-gradient(52% 42% at 50% 50%, #000, transparent 72%);
  mask-image: radial-gradient(52% 42% at 50% 50%, #000, transparent 72%);
  opacity: .55;
  transition: background-color 2600ms var(--ease-slow);
  pointer-events: none;
}
[data-season="haru"] .season-pool { background: #EFD9CE; }
[data-season="natsu"] .season-pool { background: #DEE6CC; }
[data-season="aki"]  .season-pool { background: #EDDDBE; }
[data-season="fuyu"] .season-pool { background: #D9E0DE; }

.haiku-stage {
  position: relative;
  height: clamp(15rem, 34vh, 19rem);
  margin-bottom: 3rem;
}
.haiku {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  gap: 2.4rem;
  opacity: 0;
  transition: opacity 2000ms var(--ease-slow);
  pointer-events: none;
}
.haiku.on { opacity: 1; }
.haiku blockquote {
  writing-mode: vertical-rl;
  font-size: clamp(1.28rem, 1.9vw, 1.55rem);
  font-weight: 300;
  letter-spacing: .34em;
  line-height: 2.5;
  height: clamp(11.5rem, 24vh, 14rem);
}
.haiku figcaption {
  font-size: clamp(.82rem, 1vw, .9rem);
  color: var(--ink-soft);
  letter-spacing: .05em;
  line-height: 1.9;
}

.season-row {
  display: flex;
  justify-content: center;
  gap: clamp(1.6rem, 3vw, 2.6rem);
}
.season-btn {
  font-family: 'Noto Serif JP', serif;
  font-size: 1.05rem;
  font-weight: 300;
  background: none;
  border: none;
  padding: .3rem .2rem;
  color: var(--ink-faint);
  cursor: pointer;
  transition: color 1200ms var(--ease-slow), transform 1200ms var(--ease-slow),
              font-weight 1200ms var(--ease-slow);
}
.season-btn:hover { color: var(--sumi); }
.season-btn.on {
  /* darker than the seal's vermillion — 5.9:1 on washi vs. 4.5:1 raw,
     since this carries meaning as small interactive text, not a stamp.
     Weight + lift carry the "selected" state too, so it never rests on
     color alone. */
  color: var(--vermillion-text);
  font-weight: 400; /* matches a loaded weight — 300/400/600 only, no synthesis */
  transform: translateY(-3px);
}
.season-btn:active {
  transform: translateY(-1px) scale(.92);
  transition-duration: 160ms;
}

/* ── ensō ────────────────────────────────────────────────── */
.enso-wrap { width: clamp(190px, 24vw, 260px); margin: 0 auto 3.6rem; }
.enso-svg { width: 100%; height: auto; display: block; transition: transform 1100ms var(--ease-slow); transform-origin: 50% 50%; }
.drawn .enso-svg { animation: breath 11s ease-in-out 3s infinite; }
.enso-wrap:hover .enso-svg { transform: scale(1.03); }

/* ── visit ───────────────────────────────────────────────── */
.visit-lines {
  margin-top: 3.6rem;
  font-style: normal;
  display: grid;
  gap: .55rem;
  font-size: .8rem;
  letter-spacing: .14em;
  color: var(--ink-faint);
}
.visit-lines .jp { font-size: .88rem; letter-spacing: .3em; color: var(--ink-soft); }

/* ── footer ──────────────────────────────────────────────── */
.foot {
  min-height: 88vh;
  display: grid;
  place-content: center;
  justify-items: center;
  text-align: center;
  padding: 14vh 8vw 9vh;
  gap: 0;
}

.hanko {
  position: relative;
  width: clamp(64px, 7vw, 84px);
  margin-bottom: 3rem;
  opacity: 0;
  transform: scale(2.4) rotate(-9deg);
  transition: opacity 480ms var(--ease-slow), transform 720ms var(--ease-stamp);
}
.hanko.stamped {
  opacity: 1;
  transform: scale(1) rotate(-3deg);
}
.hanko-svg { width: 100%; height: auto; display: block; position: relative; z-index: 1; }

/* the seal's ink bleeding outward on contact — the site's one
   moment of real impact, kept to the same vermillion the hanko
   already spends so the "once per view" accent isn't doubled. */
.hanko-ring {
  position: absolute;
  inset: 0;
  margin: auto;
  width: 100%;
  aspect-ratio: 1;
  border-radius: 22%;
  background: radial-gradient(circle, rgba(199, 62, 46, .55), rgba(199, 62, 46, 0) 68%);
  opacity: 0;
  pointer-events: none;
}
.hanko.stamped .hanko-ring {
  animation: ink-bloom 1200ms var(--ease-slow) 560ms both;
}
@keyframes ink-bloom {
  0%   { opacity: 0;   transform: scale(.5); }
  28%  { opacity: .4; }
  100% { opacity: 0;   transform: scale(2.6); }
}

.foot-name {
  font-size: .92rem;
  letter-spacing: .22em;
  font-weight: 400;
}
.foot-credit {
  margin-top: 1.3rem;
  font-size: .72rem;
  letter-spacing: .12em;
  color: var(--ink-faint);
}
.foot-links {
  margin-top: 2.6rem;
  display: flex;
  gap: 3rem;
}
/* the whole page settles a hair under the stamp's weight */
.hanko.stamped ~ .foot-name  { animation: foot-settle 640ms var(--ease-slow) 600ms both; }
.hanko.stamped ~ .foot-credit { animation: foot-settle 640ms var(--ease-slow) 660ms both; }
.hanko.stamped ~ .foot-links  { animation: foot-settle 640ms var(--ease-slow) 720ms both; }
@keyframes foot-settle {
  0%   { translate: 0 0; }
  40%  { translate: 0 3px; }
  100% { translate: 0 0; }
}
.foot-links a {
  font-size: .72rem;
  letter-spacing: .3em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink-soft);
  padding-bottom: .35rem;
  background-image: linear-gradient(var(--sumi), var(--sumi));
  background-repeat: no-repeat;
  background-position: left bottom;
  background-size: 0% 1px;
  transition: background-size 900ms var(--ease-slow), color 900ms var(--ease-slow);
}
.foot-links a:hover {
  color: var(--sumi);
  background-size: 100% 1px;
}
.foot-links a:active {
  color: var(--ink-faint);
  transition-duration: 140ms;
}

/* ── ink cursor ──────────────────────────────────────────── */
.ink-dot {
  position: fixed;
  top: 0; left: 0;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--sumi);
  pointer-events: none;
  z-index: 60;
  opacity: 0;
  transition: opacity 600ms ease, width 700ms var(--ease-slow), height 700ms var(--ease-slow);
  transform: translate(-50%, -50%);
  will-change: left, top;
}
body.ink-cursor-live { cursor: none; }
body.ink-cursor-live a,
body.ink-cursor-live button { cursor: none; }
.ink-dot.grow {
  width: 26px;
  height: 26px;
  background: rgba(28, 26, 23, .14);
}

/* a drop of ink touching down wherever the page is pressed */
.ink-ripple {
  position: fixed;
  top: 0; left: 0;
  width: 15px;
  height: 15px;
  margin: -7.5px 0 0 -7.5px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(28, 26, 23, .32), rgba(28, 26, 23, 0) 70%);
  pointer-events: none;
  z-index: 59;
  transform: scale(0);
  opacity: .6;
  animation: ink-ripple-out 900ms var(--ease-slow) forwards;
}
@keyframes ink-ripple-out {
  0%   { transform: scale(0);   opacity: .6; }
  100% { transform: scale(7.5); opacity: 0; }
}

/* ── mobile composition ──────────────────────────────────── */
@media (max-width: 720px) {
  .hero { padding: 0 5vw; }
  .hero-vertical {
    top: auto;
    bottom: 16vh;
    transform: none;
    font-size: .7rem;
    right: 1.35rem;
  }
  .hero-art { width: 92vw; }
  .sec { min-height: 130vh; padding: 22vh 8vw; }
  .sec-label {
    position: static;
    writing-mode: horizontal-tb;
    margin-bottom: 3.2rem;
    letter-spacing: .5em;
    text-indent: .5em;
  }
  .sec-num {
    display: inline;
    margin-block-end: 0;
    margin-right: 1.4em;
  }
  .koan { line-height: 2.15; }
  .haiku { gap: 1.9rem; }
  .foot-links { gap: 2.2rem; }
}

/* ── short viewports: the falling cue was landing on top of the
   closing line. Tighten the hero's own rhythm rather than fight it. ── */
@media (max-height: 720px) {
  .hero-art { row-gap: clamp(.7rem, 3vh, 1.6rem); }
  .hero-char { font-size: clamp(5rem, 15vw, 9.6rem); }
  .hero-copy { margin-top: clamp(.8rem, 2.2vh, 1.5rem); }
  .hero-line { margin-top: .9rem; }
  .cue { bottom: 2vh; height: 34px; }
}
@media (max-height: 720px) and (max-width: 720px) {
  .hero-vertical { bottom: 11vh; }
}

/* ── reduced motion: the garden is already still ─────────── */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; }
  path[data-draw] { transition: none; stroke-dashoffset: 0 !important; }
  .hero-char { opacity: 1; transform: none; transition: none; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .haiku { transition: opacity 400ms ease; }
  .season-pool { transition: none; }
  .hanko { opacity: 1; transform: scale(1) rotate(-3deg); transition: none; }
  .cue span { transform: translateY(0); opacity: .4; }
  .ink-wash { display: none; }
  .hanko-ring { display: none; }
  .stone, .enso-svg { transition: none; }
  .stone:hover, .enso-wrap:hover .enso-svg { transform: none; }
}