:root {
  --lacquer: #0B0A08;
  --paper: #EFE1C6;
  --vermilion: #C62F1D;
  --indigo: #1C2F4A;
  --bronze: #B27A3B;
  --ash: #C9C0AE;
  --bamboo: #475A34;
  --serif: "Noto Serif JP", serif;
  --body: "Zen Kaku Gothic New", sans-serif;
  --tall: "Bebas Neue", sans-serif;
  --mono: "IBM Plex Mono", monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--lacquer);
  color: var(--paper);
  font-family: var(--body);
  overflow-x: hidden;
}

.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 40;
  opacity: .16;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(239,225,198,.18) 0 1px, transparent 1px),
    radial-gradient(circle at 70% 60%, rgba(201,192,174,.12) 0 1px, transparent 1px),
    linear-gradient(110deg, transparent 0 45%, rgba(239,225,198,.05) 46%, transparent 47% 100%);
  background-size: 34px 34px, 47px 47px, 220px 220px;
  mix-blend-mode: screen;
}

.cursor-pressure {
  position: fixed;
  width: 220px;
  height: 220px;
  border: 1px solid rgba(201,192,174,.15);
  border-radius: 50%;
  transform: translate(-50%, -50%) scale(.6);
  pointer-events: none;
  z-index: 30;
  opacity: 0;
  background: radial-gradient(circle, rgba(198,47,29,.18), transparent 60%);
  transition: opacity .35s ease, transform .35s ease;
}

.cursor-pressure.active { opacity: 1; transform: translate(-50%, -50%) scale(1); }

.form-nav {
  position: fixed;
  right: 26px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 35;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.form-nav a {
  color: var(--ash);
  text-decoration: none;
  font-family: var(--mono);
  font-size: 11px;
  opacity: .55;
  transition: color .35s ease, opacity .35s ease, transform .35s ease;
}

.form-nav a.active { color: var(--vermilion); opacity: 1; transform: translateX(-8px); }

.form {
  min-height: 100vh;
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.form::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  background: radial-gradient(circle at 50% 50%, rgba(239,225,198,.08), transparent 54%), var(--lacquer);
}

.form-gate {
  display: grid;
  place-items: center;
  background: radial-gradient(circle at 50% 68%, rgba(178,122,59,.14), transparent 37%), var(--lacquer);
}

.rice-light {
  position: absolute;
  width: min(48vw, 560px);
  height: 68vh;
  background: linear-gradient(180deg, rgba(239,225,198,.86), rgba(239,225,198,.28));
  clip-path: polygon(20% 0, 80% 0, 100% 100%, 0 100%);
  filter: blur(.2px);
  opacity: .52;
  transform: perspective(700px) rotateX(61deg) translateY(18vh);
}

.vertical-title {
  writing-mode: vertical-rl;
  font-family: var(--serif);
  font-weight: 900;
  letter-spacing: .08em;
  font-size: clamp(3rem, 8vw, 8rem);
  color: var(--paper);
  text-shadow: 0 0 32px rgba(239,225,198,.16);
  transform: translateY(0);
  transition: transform 1s cubic-bezier(.2,.8,.2,1);
}

body.has-bowed .vertical-title { transform: translateY(34px) rotate(.7deg); }

.hanging-cords span {
  position: absolute;
  top: 0;
  width: 1px;
  height: 38vh;
  background: linear-gradient(var(--ash), transparent);
  opacity: .35;
  animation: drift 5s ease-in-out infinite;
}
.hanging-cords span:nth-child(1) { left: 26%; }
.hanging-cords span:nth-child(2) { left: 52%; animation-delay: -1.5s; }
.hanging-cords span:nth-child(3) { left: 74%; animation-delay: -3s; }

.gate-feet i,
.foot {
  position: absolute;
  width: 42px;
  height: 86px;
  border-radius: 45% 45% 55% 55%;
  border: 1px solid rgba(201,192,174,.45);
  background: radial-gradient(ellipse at 50% 25%, rgba(201,192,174,.18), transparent 60%);
}

.gate-feet i { bottom: 24%; left: calc(50% - 55px); transform: rotate(-8deg); opacity: .45; }
.gate-feet i:nth-child(2) { left: calc(50% + 18px); transform: rotate(8deg); }

.seal {
  display: grid;
  place-items: center;
  font-family: var(--serif);
  font-weight: 900;
  color: var(--paper);
  background: var(--vermilion);
  box-shadow: 0 0 0 6px rgba(198,47,29,.22), inset 0 0 18px rgba(11,10,8,.18);
}

.gate-seal {
  position: absolute;
  right: 18vw;
  bottom: 18vh;
  width: 72px;
  height: 72px;
  transform: scale(0) rotate(-12deg);
  transition: transform .75s cubic-bezier(.2,1.5,.3,1);
}
body.has-bowed .gate-seal { transform: scale(1) rotate(-12deg); }

.floor-svg { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.wake-line, .chalk-line, .bronze-line, .green-line, .enso-line, .foot-constellation {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.wake-line { stroke: var(--ash); stroke-width: 2; opacity: .33; stroke-dasharray: 900; stroke-dashoffset: 900; transition: stroke-dashoffset 1.8s ease; }
body.has-bowed .wake-line { stroke-dashoffset: 0; }
.dash-ring { fill: none; stroke: var(--ash); stroke-width: 2; stroke-dasharray: 12 18; opacity: .34; }
.chalk-line { stroke: var(--ash); stroke-width: 3; opacity: .5; }
.bronze-line { stroke: var(--bronze); stroke-width: 4; opacity: .72; }
.green-line { stroke: var(--bamboo); stroke-width: 3; opacity: .65; }

.manual-note, .annotation, .manual-margin {
  position: absolute;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ash);
  opacity: .68;
}
.note-top { top: 34px; left: 34px; }
.note-bottom { bottom: 32px; left: 50%; transform: translateX(-50%); }
.scroll-hint { position: absolute; bottom: 34px; font-family: var(--tall); letter-spacing: .2em; color: var(--bronze); }

.chapter-mark {
  font-family: var(--tall);
  letter-spacing: .2em;
  font-size: clamp(1rem, 2vw, 1.8rem);
  color: var(--bronze);
}

h2 {
  margin: .1em 0 .25em;
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(3.6rem, 10vw, 12rem);
  line-height: .86;
}

p { font-size: clamp(1rem, 1.5vw, 1.35rem); line-height: 1.7; color: var(--ash); }

.form-stance { background: linear-gradient(90deg, var(--indigo), var(--lacquer) 52%); }
.form-stance h2, .form-stance .chapter-copy { position: absolute; left: 7vw; top: 14vh; max-width: 650px; z-index: 5; }
.form-stance .chapter-copy { top: 45vh; max-width: 390px; }
.form-stance .chapter-mark { position: absolute; left: 7vw; top: 9vh; z-index: 5; }
.stance-board {
  position: absolute;
  right: 4vw;
  bottom: 6vh;
  width: min(70vw, 1000px);
  height: 70vh;
  border: 1px solid rgba(178,122,59,.38);
  background: linear-gradient(135deg, rgba(239,225,198,.12), rgba(201,192,174,.04));
  transform: rotate(-4deg);
  box-shadow: 0 30px 70px rgba(0,0,0,.42);
}
.tatami-lines { position: absolute; inset: 0; background: repeating-linear-gradient(90deg, transparent 0 120px, rgba(201,192,174,.12) 121px 124px), repeating-linear-gradient(0deg, transparent 0 120px, rgba(201,192,174,.08) 121px 124px); }
.foot { opacity: 0; transform: scale(.6); transition: opacity .7s ease, transform .9s cubic-bezier(.2,1.4,.3,1); }
.foot span { position: absolute; left: 48px; top: 25px; white-space: nowrap; font-family: var(--mono); font-size: 11px; color: var(--ash); }
.step-one { left: 25%; top: 48%; transform: rotate(-20deg) scale(.6); }
.step-two { left: 48%; top: 36%; transform: rotate(12deg) scale(.6); transition-delay: .22s; }
.step-three { left: 66%; top: 56%; transform: rotate(32deg) scale(.6); transition-delay: .45s; }
.form-stance.in-view .foot { opacity: 1; }
.form-stance.in-view .step-one { transform: rotate(-20deg) scale(1); }
.form-stance.in-view .step-two { transform: rotate(12deg) scale(1); }
.form-stance.in-view .step-three { transform: rotate(32deg) scale(1); }
.dust { position: absolute; width: 180px; height: 180px; border-radius: 50%; background: radial-gradient(circle, rgba(201,192,174,.22), transparent 62%); opacity: 0; }
.dust-a { left: 20%; top: 41%; }.dust-b { left: 61%; top: 49%; }
.form-stance.in-view .dust { animation: dustPulse 1.8s ease .25s both; }
.manual-margin.left { left: 24px; bottom: 18vh; writing-mode: vertical-rl; }
.manual-margin.right { right: 72px; top: 12vh; writing-mode: vertical-rl; color: var(--bamboo); }

.form-strike { background: radial-gradient(circle at 76% 20%, rgba(28,47,74,.72), transparent 48%), var(--lacquer); }
.red-cut { position: absolute; width: 150vw; height: 34px; left: -25vw; top: 47%; background: var(--vermilion); transform: rotate(-38deg) scaleX(0); transform-origin: left center; box-shadow: 0 0 45px rgba(198,47,29,.45); transition: transform 1.1s cubic-bezier(.16,.9,.18,1); z-index: 4; }
.form-strike.in-view .red-cut { transform: rotate(-38deg) scaleX(1); }
.safe-copy { position: absolute; right: 8vw; bottom: 12vh; width: min(520px, 44vw); z-index: 6; text-align: right; }
.duel-silhouette { position: absolute; left: 10vw; bottom: 14vh; width: 42vw; height: 50vh; }
.guard { position: absolute; bottom: 0; width: 90px; height: 260px; background: linear-gradient(var(--indigo), rgba(28,47,74,.15)); clip-path: polygon(45% 0, 70% 20%, 58% 100%, 22% 100%, 34% 20%); opacity: .75; }
.guard-a { left: 20%; }.guard-b { right: 22%; transform: scaleX(-1); }
.wooden-sword { position: absolute; left: 33%; top: 38%; width: 360px; height: 10px; background: var(--bronze); transform: rotate(-20deg); transform-origin: left center; box-shadow: 0 0 18px rgba(178,122,59,.35); }
.attack-map { opacity: .58; }
.blade-note { right: 12vw; top: 18vh; color: var(--vermilion); }

.form-courtyard { background: var(--paper); color: var(--lacquer); }
.form-courtyard::before { background: linear-gradient(180deg, rgba(239,225,198,.95), rgba(201,192,174,.76)); }
.bamboo-shadows span { position: absolute; top: -20vh; width: 28px; height: 140vh; background: rgba(71,90,52,.18); transform: rotate(18deg); animation: sweep 9s ease-in-out infinite; }
.bamboo-shadows span:nth-child(1) { left: 8%; }.bamboo-shadows span:nth-child(2) { left: 24%; animation-delay: -2s; }.bamboo-shadows span:nth-child(3) { right: 20%; animation-delay: -4s; }.bamboo-shadows span:nth-child(4) { right: 6%; animation-delay: -6s; }
.paper-panel { position: absolute; left: 7vw; top: 14vh; width: min(520px, 42vw); padding: 38px; background: rgba(239,225,198,.78); border-left: 7px solid var(--vermilion); box-shadow: 0 18px 60px rgba(11,10,8,.16); transform-origin: 50% 120%; transition: transform 1s ease; }
.form-courtyard.in-view .paper-panel { transform: rotate(-2deg); }
.form-courtyard h2 { color: var(--lacquer); font-size: clamp(3rem, 8vw, 9rem); }
.form-courtyard p { color: var(--indigo); }
.courtyard-ring { position: absolute; right: 4vw; top: 8vh; width: min(62vw, 760px); height: min(78vh, 760px); transform: rotate(12deg); transition: transform 1.2s ease; }
.form-courtyard.in-view .courtyard-ring { transform: rotate(0deg); }
.side-silhouette span { position: absolute; right: 15vw; bottom: 9vh; width: 280px; height: 75px; background: rgba(11,10,8,.52); filter: blur(10px); border-radius: 50%; }

.form-vow { display: grid; place-items: center; background: radial-gradient(circle at 50% 50%, rgba(239,225,198,.16), transparent 44%), var(--lacquer); }
.banner-field { position: absolute; top: 0; height: 100vh; display: flex; gap: 18px; align-items: flex-start; justify-content: center; width: 100%; pointer-events: none; }
.banner-field span { writing-mode: vertical-rl; min-height: 42vh; padding: 28px 12px; background: linear-gradient(var(--paper), rgba(239,225,198,.72)); color: var(--lacquer); font-family: var(--serif); font-size: clamp(2rem, 4vw, 4.8rem); transform: translateY(-18vh) rotate(var(--r, 3deg)); transition: transform 1.2s cubic-bezier(.2,.9,.2,1); box-shadow: 0 18px 40px rgba(0,0,0,.25); }
.banner-field span:nth-child(2) { --r: -2deg; min-height: 20vh; color: var(--vermilion); }
.banner-field span:nth-child(3) { --r: 1deg; }
.form-vow.in-view .banner-field span { transform: translateY(0) rotate(0deg); }
.enso { position: absolute; width: min(78vmin, 700px); height: min(78vmin, 700px); opacity: .88; }
.enso-line { stroke: var(--ash); stroke-width: 15; opacity: .72; stroke-dasharray: 1900; stroke-dashoffset: 1900; transition: stroke-dashoffset 1.8s ease .25s; }
.foot-constellation { stroke: var(--bronze); stroke-width: 3; stroke-dasharray: 700; stroke-dashoffset: 700; transition: stroke-dashoffset 1.5s ease .65s; }
.form-vow.in-view .enso-line, .form-vow.in-view .foot-constellation { stroke-dashoffset: 0; }
.final-copy { position: relative; z-index: 3; width: min(680px, 80vw); text-align: center; margin-top: 22vh; }
.final-copy h2 { font-size: clamp(3.2rem, 9vw, 10rem); }
.final-seal { position: absolute; right: 18vw; bottom: 18vh; width: 96px; height: 96px; border-radius: 3px; transform: scale(0) rotate(8deg); transition: transform .65s cubic-bezier(.2,1.5,.3,1) 1s; z-index: 5; }
.form-vow.in-view .final-seal { transform: scale(1) rotate(8deg); }
.permit { position: absolute; bottom: 30px; padding: 12px 22px; background: var(--vermilion); color: var(--paper); font-family: var(--mono); text-decoration: none; text-transform: uppercase; letter-spacing: .12em; box-shadow: 0 0 0 5px rgba(198,47,29,.18); }

@keyframes drift { 0%,100% { transform: translateX(0); } 50% { transform: translateX(12px); } }
@keyframes dustPulse { 0% { opacity: 0; transform: scale(.3); } 35% { opacity: .8; } 100% { opacity: 0; transform: scale(1.5); } }
@keyframes sweep { 0%,100% { transform: translateX(-20px) rotate(18deg); } 50% { transform: translateX(34px) rotate(21deg); } }

@media (max-width: 760px) {
  .form-nav { right: 12px; }
  .safe-copy, .paper-panel, .form-stance h2, .form-stance .chapter-copy, .form-stance .chapter-mark { left: 7vw; right: auto; width: 80vw; text-align: left; }
  .stance-board { width: 92vw; right: -18vw; opacity: .72; }
  .duel-silhouette { width: 84vw; left: 0; opacity: .5; }
  .courtyard-ring { width: 110vw; right: -38vw; top: 24vh; }
}