:root {
  --kg-bg: #111009;
  --kg-bg-deep: #080704;
  --kg-surface: #181610;
  --kg-surface-raised: #211e16;
  --kg-ink: #ffffff;
  --kg-ink-soft: #e8e6e3;
  --kg-ink-faint: #aaa49a;
  --kg-gold: #d4af37;
  --kg-gold-bright: #fef08a;
  --kg-gold-dim: #9e8050;
  --kg-green: #34d399;
  --kg-sky: #60a5fa;
  --kg-mask-full: #ffffff; /* mask luminance (white = fully visible), not a display colour */
  --kg-coral: #fb7185;
  --kg-line: rgb(255 255 255 / 12%);
  --kg-line-strong: rgb(255 255 255 / 22%);
  --kg-gold-line: rgb(212 175 55 / 58%);
  --kg-gold-soft: rgb(212 175 55 / 8%);
  --kg-gold-wash: rgb(212 175 55 / 17%);
  --kg-dark-wash: rgb(0 0 0 / 42%);
  --kg-shadow: rgb(0 0 0 / 42%);
  --kg-cut: polygon(14px 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%, 0 14px);
  --kg-font-body: "Hiragino Mincho ProN", "Yu Mincho", "Noto Serif JP", serif;
  --kg-font-ui: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
  --kg-font-display: "Orbitron", "Avenir Next", "Hiragino Sans", sans-serif;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { background: var(--kg-bg); scroll-behavior: smooth; }

body {
  /* Keep the shared About default at 76% 18%; only this page moves its glow. */
  --toiro-glow-position: 76% 82%;
  min-width: 320px;
  margin: 0;
  overflow-x: hidden;
  isolation: isolate;
  background: var(--kg-bg);
  color: var(--kg-ink-soft);
  font-family: var(--kg-font-body);
  font-size: 1rem;
  font-kerning: normal;
  line-height: 1.9;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body::before {
  position: fixed;
  z-index: -1;
  inset: 0;
  content: "";
  background: var(--toiro-glow-layer);
  pointer-events: none;
}


/* Shared Toiro Asanoha backplate behind the existing page Glow. */
body::after {
  position: fixed;
  z-index: -2;
  inset: 0;
  content: "";
  background-color: #9e8050;
  -webkit-mask-image: url("data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%2234.64%22%20height%3D%2260%22%20viewBox%3D%220%200%2034.64%2060%22%3E%20%3Cdefs%3E%20%3Cg%20id%3D%22asanoha-unit%22%20fill%3D%22none%22%20stroke%3D%22%23fff%22%20stroke-width%3D%220.6%22%20stroke-linecap%3D%22round%22%20stroke-linejoin%3D%22round%22%3E%20%3Cpath%20d%3D%22M0%200V-20M0%200L17.32-10M0%200L17.32%2010M0%200V20M0%200L-17.32%2010M0%200L-17.32-10M0-20L17.32-10V10L0%2020L-17.32%2010V-10Z%22%2F%3E%20%3Cpath%20d%3D%22M5.7725-10L0%200M5.7725-10L0-20M5.7725-10H17.32M11.5475%200H0M11.5475%200L17.32-10M11.5475%200L17.32%2010M5.7725%2010L0%200M5.7725%2010H17.32M5.7725%2010L0%2020M-5.7725%2010L0%200M-5.7725%2010L0%2020M-5.7725%2010H-17.32M-11.5475%200H0M-11.5475%200L-17.32%2010M-11.5475%200L-17.32-10M-5.7725-10L0%200M-5.7725-10H-17.32M-5.7725-10L0-20%22%2F%3E%20%3C%2Fg%3E%20%3C%2Fdefs%3E%20%3Cg%20aria-hidden%3D%22true%22%3E%20%3Cuse%20href%3D%22%23asanoha-unit%22%20x%3D%220%22%20y%3D%220%22%2F%3E%20%3Cuse%20href%3D%22%23asanoha-unit%22%20x%3D%2234.64%22%20y%3D%220%22%2F%3E%20%3Cuse%20href%3D%22%23asanoha-unit%22%20x%3D%2217.32%22%20y%3D%2230%22%2F%3E%20%3Cuse%20href%3D%22%23asanoha-unit%22%20x%3D%220%22%20y%3D%2260%22%2F%3E%20%3Cuse%20href%3D%22%23asanoha-unit%22%20x%3D%2234.64%22%20y%3D%2260%22%2F%3E%20%3C%2Fg%3E%20%3C%2Fsvg%3E");
  mask-image: url("data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%2234.64%22%20height%3D%2260%22%20viewBox%3D%220%200%2034.64%2060%22%3E%20%3Cdefs%3E%20%3Cg%20id%3D%22asanoha-unit%22%20fill%3D%22none%22%20stroke%3D%22%23fff%22%20stroke-width%3D%220.6%22%20stroke-linecap%3D%22round%22%20stroke-linejoin%3D%22round%22%3E%20%3Cpath%20d%3D%22M0%200V-20M0%200L17.32-10M0%200L17.32%2010M0%200V20M0%200L-17.32%2010M0%200L-17.32-10M0-20L17.32-10V10L0%2020L-17.32%2010V-10Z%22%2F%3E%20%3Cpath%20d%3D%22M5.7725-10L0%200M5.7725-10L0-20M5.7725-10H17.32M11.5475%200H0M11.5475%200L17.32-10M11.5475%200L17.32%2010M5.7725%2010L0%200M5.7725%2010H17.32M5.7725%2010L0%2020M-5.7725%2010L0%200M-5.7725%2010L0%2020M-5.7725%2010H-17.32M-11.5475%200H0M-11.5475%200L-17.32%2010M-11.5475%200L-17.32-10M-5.7725-10L0%200M-5.7725-10H-17.32M-5.7725-10L0-20%22%2F%3E%20%3C%2Fg%3E%20%3C%2Fdefs%3E%20%3Cg%20aria-hidden%3D%22true%22%3E%20%3Cuse%20href%3D%22%23asanoha-unit%22%20x%3D%220%22%20y%3D%220%22%2F%3E%20%3Cuse%20href%3D%22%23asanoha-unit%22%20x%3D%2234.64%22%20y%3D%220%22%2F%3E%20%3Cuse%20href%3D%22%23asanoha-unit%22%20x%3D%2217.32%22%20y%3D%2230%22%2F%3E%20%3Cuse%20href%3D%22%23asanoha-unit%22%20x%3D%220%22%20y%3D%2260%22%2F%3E%20%3Cuse%20href%3D%22%23asanoha-unit%22%20x%3D%2234.64%22%20y%3D%2260%22%2F%3E%20%3C%2Fg%3E%20%3C%2Fsvg%3E");
  -webkit-mask-repeat: repeat;
  mask-repeat: repeat;
  -webkit-mask-size: var(--toiro-asanoha-tile-size, 69.28px 120px);
  mask-size: var(--toiro-asanoha-tile-size, 69.28px 120px);
  opacity: .045;
  pointer-events: none;
}
html[data-mode="yoru"] body::after { opacity: .07; }
a { color: inherit; }
a:focus-visible, [tabindex="0"]:focus-visible { outline: 2px solid var(--kg-gold-bright); outline-offset: 5px; }
ruby { ruby-align: center; }
rt { color: var(--kg-ink-faint); font-family: var(--kg-font-ui); font-size: 0.48em; font-weight: 600; letter-spacing: 0.04em; }
.kg-svg-defs { position: absolute; width: 0; height: 0; overflow: hidden; }
.kg-shell { width: min(100% - 40px, 1180px); margin: 0 auto; }

.kg-topbar { display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 76px; border-bottom: 1px solid var(--kg-line); }
.kg-mark { display: inline-flex; align-items: baseline; gap: 10px; color: var(--kg-ink); font-family: var(--kg-font-ui); font-size: 0.76rem; letter-spacing: 0.08em; text-decoration: none; white-space: nowrap; }
.kg-mark b { color: var(--kg-gold-bright); font-family: var(--kg-font-display); font-size: 0.82rem; font-weight: 500; letter-spacing: 0.1em; }
.kg-nav { display: flex; gap: clamp(12px, 2vw, 28px); overflow-x: auto; }
.kg-nav a { color: var(--kg-ink-faint); font-family: var(--kg-font-ui); font-size: 0.73rem; font-weight: 600; letter-spacing: 0.05em; text-decoration: none; white-space: nowrap; transition: color 160ms ease; }
.kg-nav a:hover { color: var(--kg-gold-bright); }

.kg-opening { border-bottom: 1px solid var(--kg-line); }
.kg-opening-layout { display: grid; gap: clamp(36px, 7vw, 104px); padding: clamp(58px, 9vw, 122px) 0 clamp(72px, 10vw, 150px); }
.kg-opening-copy { align-self: center; max-width: 32rem; }
.kg-eyebrow, .kg-kicker, .kg-status, .kg-caption { margin: 0; color: var(--kg-gold-bright); font-family: var(--kg-font-ui); font-size: 0.7rem; font-weight: 700; letter-spacing: 0.14em; }
.kg-title { margin: 14px 0 0; color: var(--kg-ink); text-wrap: pretty; }
.kg-title-mark { display: block; color: var(--kg-ink); font-family: var(--kg-font-display); font-size: clamp(1.78rem, 4.2vw, 3.9rem); font-weight: 500; letter-spacing: 0.08em; line-height: 1; }
.kg-title-mark rt { color: var(--kg-gold); font-size: 0.17em; letter-spacing: 0.08em; }
.kg-title-tagline { display: grid; gap: 0.08em; margin-top: clamp(30px, 4vw, 52px); font-size: clamp(2rem, 4vw, 4.1rem); font-weight: 500; letter-spacing: -0.035em; line-height: 1.22; }
.kg-title-tagline > span { white-space: nowrap; }
.kg-title em { color: var(--kg-gold-bright); font-style: normal; }
.kg-lead { max-width: 31rem; margin: 28px 0 0; color: var(--kg-ink-soft); font-size: clamp(1rem, 1.4vw, 1.12rem); line-height: 2; text-wrap: pretty; }
.kg-scroll-link { display: inline-flex; align-items: center; gap: 12px; margin-top: 33px; padding-bottom: 5px; border-bottom: 1px solid var(--kg-gold-line); color: var(--kg-gold-bright); font-family: var(--kg-font-ui); font-size: 0.8rem; font-weight: 700; letter-spacing: 0.05em; text-decoration: none; }
.kg-scroll-link span { transition: transform 160ms ease; }
.kg-scroll-link:hover span { transform: translateY(3px); }

.kg-hero-art { position: relative; min-height: min(67vw, 720px); margin: 0; overflow: hidden; border: 1px solid var(--kg-line-strong); clip-path: var(--kg-cut); box-shadow: 0 24px 65px var(--kg-shadow); }
.kg-hero-art svg { display: block; width: 100%; height: 100%; min-height: inherit; }
.kg-art-field { fill: var(--kg-bg-deep); }
.kg-art-halo { fill: url(#kg-art-halo-gradient); }
.kg-art-halo-core { stop-color: var(--kg-gold); stop-opacity: 0.14; }
.kg-art-halo-middle { stop-color: var(--kg-gold); stop-opacity: 0.045; }
.kg-art-halo-edge { stop-color: var(--kg-gold); stop-opacity: 0; }
.kg-art-asanoha { color: var(--kg-gold-dim); opacity: 0.8; }
.kg-art-measure { fill: none; stroke: var(--kg-gold-line); stroke-width: 1; }
.kg-hero-art figcaption { position: absolute; right: 0; bottom: 0; display: grid; gap: 2px; min-width: min(68%, 250px); padding: 14px 18px; border-top: 1px solid var(--kg-gold-line); border-left: 1px solid var(--kg-gold-line); background: var(--kg-dark-wash); color: var(--kg-ink-faint); font-family: var(--kg-font-ui); font-size: 0.71rem; line-height: 1.55; }
.kg-hero-art figcaption b { color: var(--kg-ink-soft); font-weight: 600; }

.kg-video-section, .kg-definition, .kg-language, .kg-origin, .kg-application { padding: clamp(76px, 12vw, 164px) 0; scroll-margin-top: 22px; border-bottom: 1px solid var(--kg-line); }
.kg-section-heading, .kg-definition-intro, .kg-language-title, .kg-origin-header, .kg-application-intro { max-width: 44rem; }
h2, h3 { color: var(--kg-ink); font-weight: 500; text-wrap: pretty; }
.kg-section-heading h2, .kg-definition h2, .kg-language h2, .kg-origin h2, .kg-application h2 { max-width: 15ch; margin: 12px 0 0; font-size: clamp(2rem, 4.4vw, 4.25rem); letter-spacing: -0.04em; line-height: 1.3; }
.kg-language h2 > span { display: block; white-space: nowrap; }

.kg-video-frame { position: relative; display: grid; min-height: 0; aspect-ratio: 16 / 9; margin: clamp(32px, 5vw, 62px) 0 0; overflow: hidden; place-items: center; border: 1px solid var(--kg-gold-line); background: linear-gradient(135deg, var(--kg-bg-deep), var(--kg-surface)); clip-path: var(--kg-cut); }
.kg-video-frame::before, .kg-video-frame::after { position: absolute; content: ""; pointer-events: none; }
.kg-video-frame::before { inset: 18% 9%; border-top: 1px solid var(--kg-line-strong); border-bottom: 1px solid var(--kg-line); }
.kg-video-frame::after { width: 30%; aspect-ratio: 1; border: 1px solid var(--kg-gold-line); border-radius: 50%; opacity: 0.45; }
.kg-video-copy { position: relative; z-index: 1; display: grid; gap: 7px; max-width: 29ch; padding: clamp(16px, 3vw, 28px); border-left: 2px solid var(--kg-gold); background: var(--kg-dark-wash); text-align: left; }
.kg-video-copy strong { color: var(--kg-ink); font-size: clamp(1.1rem, 2.4vw, 1.55rem); font-weight: 500; }
.kg-video-copy span { color: var(--kg-ink-faint); font-family: var(--kg-font-ui); font-size: 0.78rem; line-height: 1.7; }

.kg-definition { display: grid; gap: clamp(34px, 7vw, 90px); }
.kg-definition-body { display: grid; gap: 36px; }
.kg-definition-statement { max-width: 28ch; margin: 0; color: var(--kg-gold-bright); font-size: clamp(1.35rem, 2.4vw, 2rem); font-weight: 500; line-height: 1.8; }
.kg-terms { margin: 0; border-top: 1px solid var(--kg-line); }
.kg-terms div { display: grid; gap: 12px; padding: 26px 0; border-bottom: 1px solid var(--kg-line); }
.kg-terms dt { color: var(--kg-ink); font-family: var(--kg-font-display); font-size: clamp(1rem, 1.8vw, 1.28rem); font-weight: 500; letter-spacing: 0.06em; }
.kg-terms dd { max-width: 45rem; margin: 0; color: var(--kg-ink-faint); font-size: 0.98rem; text-wrap: pretty; }

.kg-language { display: grid; gap: clamp(34px, 6vw, 70px); }
.kg-color-rhythm { display: grid; gap: 12px; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.kg-swatch-item { --kg-swatch-accent: var(--kg-gold); --kg-swatch-base: var(--kg-bg-deep); display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 3px 12px; min-width: 0; margin: 0; padding: 0 0 12px; border-bottom: 1px solid var(--kg-line); color: var(--kg-swatch-accent); font-family: var(--kg-font-ui); }
.kg-swatch-item svg { grid-column: 1 / -1; display: block; width: 100%; height: auto; border: 1px solid var(--kg-line); }
.kg-swatch-item span { color: var(--kg-ink-soft); font-size: 0.78rem; font-weight: 700; }
.kg-swatch-item code { color: var(--kg-ink-faint); font-family: var(--kg-font-display); font-size: 0.66rem; letter-spacing: 0.04em; }
.kg-swatch-role { grid-column: 1 / -1; margin: 2px 0 0; color: var(--kg-ink-faint); font-family: var(--kg-font-ui); font-size: 0.7rem; line-height: 1.55; line-break: strict; overflow-wrap: anywhere; word-break: normal; }
.kg-swatch-term { display: inline-block; white-space: nowrap; }
.kg-swatch-item--night { --kg-swatch-accent: var(--kg-gold-dim); }
.kg-swatch-item--ink { --kg-swatch-accent: var(--kg-ink); --kg-swatch-base: var(--kg-surface); }
  .kg-swatch-item--gold { --kg-swatch-accent: var(--kg-gold); }
  .kg-swatch-item--green { --kg-swatch-accent: var(--kg-green); }
  .kg-swatch-item--cyan { --kg-swatch-accent: var(--kg-sky); }
.kg-swatch-item--pink { --kg-swatch-accent: var(--kg-coral); }
.kg-swatch-field { fill: var(--kg-swatch-base); }
.kg-swatch-wash { opacity: 1; }
.kg-swatch-halo-core { stop-color: var(--kg-swatch-accent); stop-opacity: 0.14; }
.kg-swatch-halo-middle { stop-color: var(--kg-swatch-accent); stop-opacity: 0.045; }
.kg-swatch-halo-edge { stop-color: var(--kg-swatch-accent); stop-opacity: 0; }
.kg-swatch-asanoha { color: var(--kg-swatch-accent); opacity: 0.72; }
.kg-swatch-pulse { fill: none; stroke: var(--kg-swatch-accent); stroke-dasharray: 12 70; stroke-dashoffset: 76; stroke-width: 0.85; opacity: 0; }
@media (hover: hover) { .kg-swatch-item:hover .kg-swatch-pulse { animation: kg-pulse-once 820ms ease-out both; } }
.kg-swatch-item:focus-visible .kg-swatch-pulse { animation: kg-pulse-once 820ms ease-out both; }

.kg-guide-layout { display: grid; gap: clamp(34px, 6vw, 75px); align-items: start; }
.kg-guide-copy { max-width: 44rem; }
.kg-guide-copy h3 { margin: 0; font-size: clamp(1.38rem, 2.8vw, 2rem); line-height: 1.5; }
.kg-guide-copy p { max-width: 42rem; margin: 18px 0 0; color: var(--kg-ink-faint); text-wrap: pretty; }
.kg-shape-rule { padding: clamp(18px, 3vw, 28px); border-top: 1px solid var(--kg-gold-line); border-bottom: 1px solid var(--kg-line); }
.kg-corner-sample { display: grid; min-height: 145px; margin: 15px 0 19px; place-items: center; border: 1px solid var(--kg-gold-line); background: linear-gradient(135deg, var(--kg-surface), var(--kg-bg-deep)); clip-path: var(--kg-cut); color: var(--kg-gold-bright); font-family: var(--kg-font-ui); font-size: 0.82rem; font-weight: 700; }
.kg-shape-rule > p:not(.kg-caption) { margin: 0; color: var(--kg-ink-faint); font-size: 0.95rem; }
.kg-shape-rule > p + .kg-caption { margin-top: 14px; color: var(--kg-ink-faint); }

.kg-origin-list { margin: clamp(36px, 6vw, 78px) 0 0; padding: 0; list-style: none; border-top: 1px solid var(--kg-line); }
.kg-origin-list li { display: grid; gap: 15px; padding: 28px 0 34px; border-bottom: 1px solid var(--kg-line); }
.kg-origin-list h3 { margin: 0; font-size: clamp(1.3rem, 2.8vw, 2rem); line-height: 1.45; }
.kg-origin-list p:not(.kg-status):not(.kg-caption):not(.kg-origin-source) { max-width: 51rem; margin: 16px 0 0; color: var(--kg-ink-faint); text-wrap: pretty; }
.kg-origin-decision { padding-left: clamp(18px, 4vw, 50px) !important; border-left: 2px solid var(--kg-gold); background: linear-gradient(90deg, var(--kg-gold-soft), transparent 80%); }
.kg-origin-decision h3, .kg-origin-decision ruby { color: var(--kg-gold-bright); }
.kg-culture-note { max-width: 48rem; margin-top: 24px; padding: 18px 20px; border-left: 2px solid var(--kg-gold); background: var(--kg-gold-soft); }
.kg-culture-note p { margin: 10px 0 0; color: var(--kg-ink-faint); font-size: 0.89rem; }
.kg-culture-note .kg-caption { margin-top: 0; color: var(--kg-gold-bright); }
.kg-origin-source { margin: 18px 0 0 !important; }
.kg-origin-source a { color: var(--kg-gold-bright); }

.kg-application-body { display: grid; gap: clamp(34px, 7vw, 90px); margin-top: clamp(38px, 6vw, 76px); }
.kg-application-links { display: grid; gap: 1px; border: 1px solid var(--kg-line); background: var(--kg-line); }
.kg-application-links a { display: grid; align-content: start; gap: 7px; min-height: 175px; padding: clamp(20px, 3vw, 30px); background: var(--kg-surface); text-decoration: none; transition: background-color 160ms ease, transform 160ms ease; }
.kg-application-links a:first-child { background: linear-gradient(135deg, var(--kg-surface-raised), var(--kg-surface)); }
.kg-application-links a:hover { background: var(--kg-surface-raised); transform: translateY(-2px); }
.kg-application-links span { color: var(--kg-gold-bright); font-family: var(--kg-font-ui); font-size: 0.7rem; font-weight: 700; letter-spacing: 0.1em; }
.kg-application-links b { color: var(--kg-ink); font-size: clamp(1.4rem, 2.8vw, 2.15rem); font-weight: 500; }
.kg-application-links small { color: var(--kg-ink-faint); font-family: var(--kg-font-ui); font-size: 0.8rem; line-height: 1.7; }
.kg-rule-list { display: grid; gap: 17px; margin: 0; padding: 0; list-style: none; }
.kg-rule-list li { display: grid; grid-template-columns: 36px minmax(0, 1fr); gap: 15px; padding-bottom: 18px; border-bottom: 1px solid var(--kg-line); color: var(--kg-ink-soft); text-wrap: pretty; }
.kg-rule-list b { color: var(--kg-gold); font-family: var(--kg-font-display); font-size: 0.78rem; font-weight: 500; letter-spacing: 0.08em; }
.kg-footer { padding: 33px 0 44px; color: var(--kg-ink-faint); font-family: var(--kg-font-ui); font-size: 0.77rem; }
.kg-footer p { margin: 0; }
.kg-footer a { color: var(--kg-gold-bright); }

@keyframes kg-pulse-once { 0% { opacity: 0; stroke-dashoffset: 76; } 18% { opacity: 1; } 100% { opacity: 0; stroke-dashoffset: -8; } }

@media (min-width: 740px) {
  .kg-opening-layout { grid-template-columns: minmax(0, 0.8fr) minmax(420px, 1.2fr); align-items: center; }
  .kg-hero-art { min-height: min(48vw, 680px); }
  .kg-definition { grid-template-columns: minmax(0, 0.77fr) minmax(0, 1.23fr); }
  .kg-terms div { grid-template-columns: minmax(138px, 0.66fr) minmax(0, 1.34fr); gap: 30px; }
  .kg-color-rhythm { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .kg-guide-layout { grid-template-columns: minmax(0, 1.14fr) minmax(275px, 0.86fr); }
  .kg-origin-list li { grid-template-columns: minmax(128px, 0.42fr) minmax(0, 1.58fr); gap: 34px; padding: 37px 0 43px; }
  .kg-application-body { grid-template-columns: minmax(0, 1.22fr) minmax(280px, 0.78fr); }
  .kg-application-links { grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); }
  .kg-application-links a:first-child { grid-row: span 2; min-height: 100%; }
}

@media (min-width: 1080px) {
  .kg-video-section { display: grid; grid-template-columns: minmax(260px, 0.69fr) minmax(0, 1.31fr); gap: 8%; align-items: center; }
  .kg-video-frame { margin-top: 0; }
}

@media (max-width: 739px) {
  .kg-topbar { display: grid; grid-template-columns: minmax(0, 1fr); align-items: start; min-height: 0; gap: 9px; padding: 14px 0 12px; }
  .kg-mark span { display: none; }
  .kg-nav { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 4px; width: 100%; overflow: visible; }
  .kg-nav a { display: flex; min-height: 2.7em; align-items: center; justify-content: center; font-size: 0.61rem; letter-spacing: 0; line-height: 1.35; text-align: center; white-space: nowrap; }
  /* 語の途中で折らない：見出し語は1行のまま、6項目を3列×2段の格子に置く（縦積みにはしない） */
  .kg-nav a span { display: inline; }
}

@media (max-width: 480px) {
  .kg-shell { width: min(100% - 28px, 1180px); }
  .kg-opening-layout { padding-top: 48px; }
  .kg-title-mark { font-size: clamp(1.5rem, 8.6vw, 2.2rem); }
  .kg-title-tagline { font-size: clamp(1.72rem, 9.7vw, 2.35rem); }
  .kg-language h2 { font-size: clamp(1.58rem, 7vw, 2.05rem); }
  .kg-lead { font-size: 0.96rem; }
  .kg-hero-art { min-height: 390px; }
  .kg-hero-art figcaption { min-width: 78%; font-size: 0.66rem; }
  .kg-video-copy { max-width: 25ch; }
  .kg-swatch-item { padding-bottom: 10px; }
  .kg-swatch-item span { font-size: 0.7rem; }
  .kg-swatch-item code { font-size: 0.59rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; scroll-behavior: auto !important; transition-duration: 0.01ms !important; }
  .kg-swatch-pulse { opacity: 0.5; stroke-dashoffset: 0; }
}

/* KumiGlow evolution: exact Asanoha geometry stays fixed; only its valid nodes answer. */
.kg-art-asanoha { stroke-width: 1.1; }
.kg-art-node { fill: var(--kg-gold-bright); opacity: 0; transform-box: fill-box; transform-origin: center; animation: kg-node-route 7.2s ease-in-out infinite; }
.kg-art-node--2 { animation-delay: 0.52s; }.kg-art-node--3 { animation-delay: 1.04s; }.kg-art-node--4 { animation-delay: 1.56s; }.kg-art-node--5 { animation-delay: 2.08s; }.kg-art-node--6 { animation-delay: 2.6s; }.kg-art-node--7 { animation-delay: 3.12s; }
@keyframes kg-node-route { 0%, 13%, 100% { opacity: 0; transform: scale(0.6); } 16%, 25% { opacity: 1; transform: scale(1.55); } 31% { opacity: 0; transform: scale(2.2); } }

.kg-decay-comparison { display: grid; gap: 16px; max-width: 50rem; margin: clamp(35px, 6vw, 74px) 0 0; }
.kg-decay-pair { display: grid; gap: 1px; grid-template-columns: repeat(2, minmax(0, 1fr)); overflow: hidden; border: 1px solid var(--kg-line); background: var(--kg-line); }
.kg-decay-pair > div { position: relative; display: grid; min-height: 155px; place-items: end start; padding: 15px; overflow: hidden; background: var(--kg-bg); color: var(--kg-ink-faint); font-family: var(--kg-font-ui); font-size: 0.72rem; }
.kg-decay-pair > div::before { position: absolute; inset: 0; content: ""; pointer-events: none; }
.kg-decay-flat::before { background: rgb(212 175 55 / 72%); }
.kg-decay-falloff::before { background: linear-gradient(135deg, transparent 38%, rgb(212 175 55 / 14%) 62%, rgb(212 175 55 / 46%) 100%); }
.kg-decay-ui, .kg-decay-geo { position: absolute; z-index: 1; overflow: visible; }
.kg-decay-ui { top: 15px; left: 15px; width: min(96px, 52%); fill: var(--kg-ink); }
.kg-decay-geo { right: 10px; bottom: 38px; width: min(78px, 38%); color: var(--kg-gold); stroke-width: 3; }
.kg-decay-falloff .kg-decay-geo { color: var(--kg-gold-bright); filter: drop-shadow(0 0 4px rgb(212 175 55 / 70%)); }
.kg-decay-flat span { color: var(--kg-bg); }
.kg-decay-pair span, .kg-decay-comparison figcaption { position: relative; z-index: 1; }
.kg-decay-comparison figcaption { display: grid; gap: 3px; color: var(--kg-ink-faint); font-family: var(--kg-font-ui); font-size: 0.78rem; line-height: 1.7; }
.kg-decay-comparison figcaption b { color: var(--kg-gold-bright); font-weight: 700; }

.kg-patterns, .kg-section { width: min(100% - 40px, 1180px); margin: 0 auto; padding: clamp(76px, 12vw, 164px) 0; scroll-margin-top: 22px; border-bottom: 1px solid var(--kg-line); }
.kg-patterns-heading, .kg-section-header { max-width: 51rem; }
.kg-patterns h2, .kg-section h2 { max-width: 16ch; margin: 12px 0 0; color: var(--kg-ink); font-size: clamp(2rem, 4.4vw, 4.25rem); font-weight: 500; letter-spacing: -0.04em; line-height: 1.3; text-wrap: pretty; }
.kg-patterns-heading > p:not(.kg-kicker), .kg-section-header > p:not(.kg-kicker) { max-width: 48rem; margin: 20px 0 0; color: var(--kg-ink-faint); text-wrap: pretty; }
.kg-pattern-grid { display: grid; gap: 1px; margin-top: clamp(35px, 6vw, 74px); border: 1px solid var(--kg-line); background: var(--kg-line); }
.kg-pattern-card { display: grid; gap: 18px; padding: clamp(19px, 3vw, 32px); background: var(--kg-surface); }
.kg-pattern-card svg { display: block; width: 100%; min-height: 180px; max-height: 285px; color: var(--kg-gold-dim); }
.kg-pattern-wire { fill: none; stroke: currentColor; stroke-linecap: round; stroke-linejoin: round; stroke-width: 1.15; }
/* 菱は傾き1:2の細線だけで組むため、縮小表示で1px未満になると画素の段差が点線に見える。線を少し太くして連続して見せる */
.kg-pattern-card--hishi .kg-pattern-wire { stroke-width: 1.6; }
.kg-pattern-pulse { fill: none; stroke: var(--kg-gold-bright); stroke-dasharray: 9 85; stroke-dashoffset: 94; stroke-linecap: round; stroke-width: 2.4; animation: kg-pattern-pulse 4.8s ease-in-out infinite; }
.kg-pattern-card:nth-child(2) .kg-pattern-pulse { animation-delay: 0.5s; }.kg-pattern-card:nth-child(3) .kg-pattern-pulse { animation-delay: 1s; }.kg-pattern-card:nth-child(4) .kg-pattern-pulse { animation-delay: 1.5s; }.kg-pattern-card:nth-child(5) .kg-pattern-pulse { animation-delay: 2s; }
@keyframes kg-pattern-pulse { 0%, 28%, 100% { opacity: 0; stroke-dashoffset: 94; } 36% { opacity: 1; } 70% { opacity: 0.55; stroke-dashoffset: -12; } }
.kg-pattern-card h3, .kg-spatial-layout h3, .kg-ma-copy h3 { margin: 0; color: var(--kg-ink); font-size: clamp(1.22rem, 2.3vw, 1.7rem); font-weight: 500; line-height: 1.45; }
.kg-pattern-card h3 small { margin-left: 7px; color: var(--kg-gold); font-family: var(--kg-font-display); font-size: 0.62em; font-weight: 500; letter-spacing: 0.05em; }
.kg-pattern-card p, .kg-spatial-layout p, .kg-ma-copy > p:not(.kg-caption) { margin: 12px 0 0; color: var(--kg-ink-faint); font-size: 0.94rem; text-wrap: pretty; }

.kg-ma-layout, .kg-spatial-layout { display: grid; gap: clamp(32px, 6vw, 74px); margin-top: clamp(50px, 8vw, 116px); }
.kg-ma-phases { display: grid; gap: 10px; margin: 25px 0 0; padding: 0; list-style: none; }
.kg-ma-phases li { display: grid; grid-template-columns: 34px minmax(0, 1fr); gap: 2px 13px; padding: 13px 0; border-bottom: 1px solid var(--kg-line); }
.kg-ma-phases b { grid-row: span 2; color: var(--kg-gold); font-family: var(--kg-font-display); font-size: 0.75rem; font-weight: 500; }.kg-ma-phases span { color: var(--kg-ink-soft); font-weight: 600; }.kg-ma-phases small { color: var(--kg-ink-faint); font-family: var(--kg-font-ui); font-size: 0.76rem; line-height: 1.55; }
.kg-ma-comparison { display: grid; gap: 13px; margin: 0; align-content: center; }
.kg-ma-track { position: relative; display: grid; min-height: 112px; align-items: end; padding: 13px 16px; overflow: hidden; border: 1px solid var(--kg-line); background: var(--kg-bg-deep); color: var(--kg-ink-faint); font-family: var(--kg-font-ui); font-size: 0.72rem; }
.kg-ma-track::before { position: absolute; top: 42%; right: 10%; left: 10%; height: 1px; background: var(--kg-gold-line); content: ""; }.kg-ma-track i, .kg-ma-track b { position: absolute; top: calc(42% - 4px); left: 10%; width: 8px; height: 8px; border-radius: 50%; background: var(--kg-gold-bright); box-shadow: 0 0 16px var(--kg-gold); opacity: 0.4; }
.kg-ma-track b { left: 54%; width: 12px; height: 12px; opacity: 0; }.kg-ma-comparison figcaption { color: var(--kg-ink-faint); font-family: var(--kg-font-ui); font-size: 0.75rem; }
.kg-ma-comparison.is-playing .kg-ma-track--plain i { animation: kg-ma-plain 1.5s linear 1 both; }.kg-ma-comparison.is-playing .kg-ma-track--measured i { animation: kg-ma-measured 2.8s ease-in-out 1 both; }.kg-ma-comparison.is-playing .kg-ma-track--measured b { animation: kg-ma-hold 2.8s ease-in-out 1 both; }
@keyframes kg-ma-plain { from { left: 10%; opacity: 0.4; } to { left: 90%; opacity: 0; } } @keyframes kg-ma-measured { 0%, 5.4% { left: 10%; opacity: 0.1; } 54%, 57% { left: 54%; opacity: 1; } 100% { left: 90%; opacity: 0; } } @keyframes kg-ma-hold { 0%, 52%, 59%, 100% { opacity: 0; transform: scale(0.6); } 54%, 57% { opacity: 0.95; transform: scale(1); } }

.kg-spatial-layout { align-items: center; padding-top: clamp(20px, 3vw, 42px); border-top: 1px solid var(--kg-line); }.kg-spatial-layout > div { max-width: 42rem; }.kg-spatial-layout .kg-caption { margin-bottom: 13px; }
.kg-cube-figure { display: grid; gap: 13px; margin: 0; }.kg-cube-control { --kg-cube-transform: rotateX(30deg) rotateY(-38deg); position: relative; display: grid; min-height: 360px; place-items: center; overflow: hidden; border: 1px solid var(--kg-line-strong); background: radial-gradient(circle at 72% 27%, var(--kg-gold-soft), transparent 56%), var(--kg-bg-deep); cursor: grab; perspective: 750px; touch-action: pan-y; }.kg-cube-control.is-dragging { cursor: grabbing; }.kg-cube-control:focus-visible { outline: 2px solid var(--kg-gold-bright); outline-offset: 5px; }
.kg-cube { position: relative; width: 186px; height: 186px; margin-top: 68px; /* 傾けると上面が上へ張り出すため、見た目の中心を枠の中心へ下げる */ transform: var(--kg-cube-transform); transform-style: preserve-3d; transition: transform 80ms linear; }.kg-cube-face { position: absolute; inset: 0; overflow: hidden; border: 1px solid currentColor; backface-visibility: visible; }.kg-cube-face svg { display: block; width: 100%; height: 100%; }.kg-cube-face--front { color: var(--kg-gold); transform: translateZ(93px); }.kg-cube-face--right { color: var(--kg-gold-dim); transform: rotateY(90deg) translateZ(93px); }.kg-cube-face--top { color: var(--kg-gold-bright); transform: rotateX(90deg) translateZ(93px); }.kg-cube-figure figcaption { display: flex; justify-content: space-between; gap: 12px; color: var(--kg-ink-faint); font-family: var(--kg-font-ui); font-size: 0.75rem; }.kg-cube-figure figcaption span { color: var(--kg-gold-bright); }

.kg-pulse-spec { max-width: 1180px; }/* 見出しはほかの節と同じく左端に揃える（以前は中央寄せの箱で、デスクトップだけ右へずれていた） */.kg-section-header { margin: 0; }.kg-spec-stack { display: grid; gap: 1px; margin-top: clamp(36px, 6vw, 72px); border: 1px solid var(--kg-line); background: var(--kg-line); }.kg-spec-details { background: var(--kg-surface); }.kg-spec-details summary { display: flex; align-items: center; min-height: 70px; padding: 18px clamp(18px, 3vw, 30px); cursor: pointer; color: var(--kg-ink); font-family: var(--kg-font-ui); font-size: 0.96rem; font-weight: 700; list-style: none; }.kg-spec-details summary::-webkit-details-marker { display: none; }.kg-spec-details summary::after { margin-left: auto; color: var(--kg-gold-bright); content: "+"; font-family: var(--kg-font-display); font-size: 1.15rem; }.kg-spec-details[open] summary::after { content: "−"; }.kg-spec-details summary:focus-visible { outline: 2px solid var(--kg-gold-bright); outline-offset: -5px; }.kg-spec-details > p { max-width: 62rem; margin: 0; padding: 0 clamp(18px, 3vw, 30px) 24px; color: var(--kg-ink-faint); font-size: 0.92rem; text-wrap: pretty; }.kg-spec-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); margin: 0; border-top: 1px solid var(--kg-line); }.kg-spec-list div { min-width: 0; padding: 19px clamp(18px, 3vw, 30px) 23px; border-right: 1px solid var(--kg-line); border-bottom: 1px solid var(--kg-line); }.kg-spec-list div:nth-child(2n) { border-right: 0; }.kg-spec-list dt { color: var(--kg-gold-bright); font-family: var(--kg-font-ui); font-size: 0.82rem; font-weight: 700; line-height: 1.6; }.kg-spec-list dd { margin: 8px 0 0; color: var(--kg-ink-faint); font-size: 0.88rem; line-height: 1.75; text-wrap: pretty; }

@media (min-width: 740px) { .kg-color-rhythm { grid-template-columns: repeat(6, minmax(0, 1fr)); }.kg-pattern-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }.kg-pattern-card--asanoha { grid-column: span 2; grid-row: span 2; }.kg-pattern-card--asanoha svg { min-height: 400px; }.kg-ma-layout, .kg-spatial-layout { grid-template-columns: minmax(0, 1fr) minmax(270px, 0.9fr); align-items: center; }.kg-pulse-spec { width: min(100% - 40px, 1180px); } }
@media (max-width: 739px) { .kg-nav { grid-template-columns: repeat(3, minmax(0, 1fr)); }.kg-section { width: min(100% - 40px, 1180px); }.kg-spec-list { grid-template-columns: minmax(0, 1fr); }.kg-spec-list div { border-right: 0; }.kg-cube-control { min-height: 320px; } }
@media (max-width: 480px) { .kg-patterns, .kg-section { width: min(100% - 28px, 1180px); }.kg-pattern-card { padding: 17px; }.kg-pattern-card svg { min-height: 145px; }.kg-ma-track { min-height: 92px; }.kg-cube-figure figcaption { display: grid; }.kg-spec-details summary { min-height: 62px; padding: 15px; }.kg-spec-list div { padding: 16px; } }
@media (prefers-reduced-motion: reduce) { .kg-art-node { opacity: 0.56; transform: none; }.kg-pattern-pulse { opacity: 0.62; stroke-dashoffset: 0; }.kg-ma-track i { opacity: 0.6; transform: none; }.kg-cube { transition: none; } }

/* 2026-10-02 brushup: intent alignment (two pillars, credit, accurate five skeletons, KumiPulse demo). */
h1, h2, h3, .kg-definition-statement, .kg-pillar-rule, .kg-field-quote p { word-break: auto-phrase; }
.kg-ph { display: inline-block; }
/* 折り返して行頭に来た「（」の半角ぶんの空きを詰める（字下げに見えるため） */
h2:has(> .kg-ph) { text-spacing-trim: trim-start; }
.kg-section-heading h2, .kg-definition h2, .kg-language h2, .kg-origin h2, .kg-application h2, .kg-patterns h2, .kg-section h2, .kg-ma h2 { max-width: 20ch; }

.kg-origin-meta { display: flex; flex-wrap: wrap; gap: 10px 26px; margin: 26px 0 0; padding: 14px 0 0; border-top: 1px solid var(--kg-line); font-family: var(--kg-font-ui); }
.kg-origin-meta div { display: grid; gap: 2px; }
.kg-origin-meta dt { color: var(--kg-ink-faint); font-size: 0.66rem; font-weight: 700; letter-spacing: 0.12em; }
.kg-origin-meta dd { margin: 0; color: var(--kg-ink-soft); font-size: 0.84rem; font-weight: 600; }
.kg-origin-meta a { color: var(--kg-gold-bright); text-decoration-color: var(--kg-gold-line); text-underline-offset: 4px; }

.kg-definition-note { max-width: 30rem; margin: 22px 0 0; color: var(--kg-ink-faint); text-wrap: pretty; }
.kg-pillars { display: grid; gap: 1px; margin: 0; border: 1px solid var(--kg-line); background: var(--kg-line); }
.kg-pillar { display: grid; gap: 14px; padding: clamp(20px, 3vw, 32px); background: var(--kg-surface); }
.kg-pillar dt { display: grid; gap: 6px; }
.kg-pillar-name { color: var(--kg-ink); font-family: var(--kg-font-display); font-size: clamp(1.3rem, 2.6vw, 1.85rem); font-weight: 500; letter-spacing: 0.06em; }
.kg-pillar-role { color: var(--kg-gold); font-family: var(--kg-font-ui); font-size: 0.72rem; font-weight: 700; letter-spacing: 0.1em; }
.kg-pillar dd { margin: 0; }
.kg-pillar dd p { margin: 0; color: var(--kg-ink-faint); font-size: 0.96rem; text-wrap: pretty; }
.kg-pillar dd .kg-pillar-rule { margin-bottom: 10px; color: var(--kg-gold-bright); font-size: clamp(1.1rem, 2vw, 1.35rem); }
.kg-field-quote { margin: 0; padding: 20px 0 0 20px; border-left: 2px solid var(--kg-gold); }
.kg-field-quote blockquote { margin: 0; }
.kg-field-quote p { margin: 0; color: var(--kg-ink); font-size: clamp(1.1rem, 2vw, 1.45rem); line-height: 2.1; }
.kg-field-quote figcaption { margin-top: 6px; color: var(--kg-ink-faint); font-family: var(--kg-font-ui); font-size: 0.76rem; }
.kg-definition-aside { margin: 0; color: var(--kg-ink-faint); font-size: 0.9rem; }
.kg-definition-aside a { color: var(--kg-gold-bright); text-underline-offset: 4px; }

.kg-swatch-role b { display: block; color: var(--kg-swatch-accent); font-weight: 700; }
.kg-swatch-item--night .kg-swatch-role b { color: var(--kg-ink-soft); }

.kg-yohaku-layout { display: grid; gap: clamp(28px, 5vw, 64px); align-items: center; padding-top: clamp(28px, 4vw, 48px); border-top: 1px solid var(--kg-line); }
.kg-yohaku-copy h3 { margin: 12px 0 0; font-size: clamp(1.3rem, 2.6vw, 1.85rem); line-height: 1.5; }
.kg-yohaku-copy p:not(.kg-caption) { max-width: 40rem; margin: 16px 0 0; color: var(--kg-ink-faint); text-wrap: pretty; }
.kg-yohaku-layout .kg-decay-comparison { margin: 0; }

.kg-pattern-frame { fill: none; stroke: currentColor; stroke-width: 1.2; opacity: 0.75; }
.kg-pattern-card { align-content: start; }
.kg-pattern-card > div > p:not(.kg-pattern-origin) { margin: 10px 0 0; }
.kg-pattern-meta { display: grid; gap: 4px; margin: 14px 0 0; font-family: var(--kg-font-ui); font-size: 0.76rem; line-height: 1.6; }
.kg-pattern-meta div { display: grid; grid-template-columns: 5.2em minmax(0, 1fr); gap: 8px; }
.kg-pattern-meta dt { color: var(--kg-ink-faint); }
.kg-pattern-meta dd { margin: 0; color: var(--kg-gold-bright); }
.kg-pattern-card p.kg-pattern-origin { margin: 12px 0 0; padding-top: 12px; border-top: 1px solid var(--kg-line); color: var(--kg-ink-faint); font-size: 0.82rem; }
.kg-pattern-source { margin: 16px 0 0; color: var(--kg-ink-faint); font-family: var(--kg-font-ui); font-size: 0.74rem; }
.kg-pattern-source a { color: var(--kg-gold-bright); text-underline-offset: 3px; }
.kg-pattern-card svg { max-height: 300px; }

.kg-pulse-demo { --kg-demo-accent: var(--kg-gold); display: grid; gap: clamp(20px, 3vw, 36px); margin: clamp(36px, 6vw, 72px) 0 0; }
.kg-pulse-demo[data-color="green"] { --kg-demo-accent: var(--kg-green); }
.kg-pulse-demo[data-color="cyan"] { --kg-demo-accent: var(--kg-sky); }
.kg-pulse-demo[data-color="pink"] { --kg-demo-accent: var(--kg-coral); }
.kg-pulse-stage { position: relative; border: 1px solid var(--kg-line-strong); background: radial-gradient(circle at 50% 50%, color-mix(in srgb, var(--kg-demo-accent) 9%, transparent), transparent 62%), var(--kg-bg-deep); }
.kg-pulse-stage svg { display: block; width: 100%; height: auto; aspect-ratio: 1; }
.kg-pulse-base path { fill: none; stroke: var(--kg-gold-dim); stroke-width: 1; stroke-linecap: round; stroke-linejoin: round; opacity: 0.55; }
.kg-pulse-glow path { fill: none; stroke: var(--kg-demo-accent); stroke-width: 2.2; stroke-linecap: round; }
.kg-pulse-glow .kg-pulse-head { stroke-width: 3; }
.kg-pulse-glow .kg-pulse-tail { stroke-width: 2.2; }
.kg-pulse-choice--family span { min-height: 44px; }
.kg-pulse-demo.is-charging .kg-pulse-base path { opacity: 0.35; transition: opacity 120ms ease; }
.kg-pulse-label { position: absolute; left: 0; bottom: 0; margin: 0; padding: 8px 12px; border-top: 1px solid var(--kg-line); border-right: 1px solid var(--kg-line); background: var(--kg-dark-wash); color: var(--kg-ink-soft); font-family: var(--kg-font-ui); font-size: 0.72rem; }
.kg-pulse-panel { display: grid; gap: 16px; align-content: start; }
.kg-pulse-choice { display: flex; flex-wrap: wrap; gap: 6px; min-width: 0; margin: 0; padding: 0; border: 0; }
.kg-pulse-choice legend { width: 100%; margin-bottom: 6px; padding: 0; color: var(--kg-gold-bright); font-family: var(--kg-font-ui); font-size: 0.7rem; font-weight: 700; letter-spacing: 0.12em; }
.kg-pulse-choice label { position: relative; cursor: pointer; }
.kg-pulse-choice input { position: absolute; opacity: 0; pointer-events: none; }
.kg-pulse-choice span { display: inline-flex; align-items: center; min-height: 40px; padding: 0 14px; border: 1px solid var(--kg-line-strong); color: var(--kg-ink-faint); font-family: var(--kg-font-ui); font-size: 0.8rem; font-weight: 600; transition: border-color 160ms ease, color 160ms ease, background-color 160ms ease; }
.kg-pulse-choice label:hover span { color: var(--kg-ink); }
.kg-pulse-choice input:checked + span { border-color: var(--kg-gold); background: var(--kg-gold-soft); color: var(--kg-ink); }
.kg-pulse-choice input:focus-visible + span { outline: 2px solid var(--kg-gold-bright); outline-offset: 2px; }
.kg-pulse-choice--color span::before { width: 8px; height: 8px; margin-right: 8px; border-radius: 50%; background: var(--kg-dot); content: ""; }
.kg-pulse-color--gold { --kg-dot: var(--kg-gold); } .kg-pulse-color--green { --kg-dot: var(--kg-green); } .kg-pulse-color--cyan { --kg-dot: var(--kg-sky); } .kg-pulse-color--pink { --kg-dot: var(--kg-coral); }
.kg-pulse-run { justify-self: start; min-height: 44px; padding: 0 22px; border: 1px solid var(--kg-gold); background: transparent; color: var(--kg-gold-bright); cursor: pointer; font-family: var(--kg-font-ui); font-size: 0.86rem; font-weight: 700; letter-spacing: 0.08em; clip-path: var(--kg-cut); }
.kg-pulse-run:hover { background: var(--kg-gold-soft); }
.kg-pulse-run:focus-visible { outline: 2px solid var(--kg-gold-bright); outline-offset: 3px; }
.kg-pulse-panel figcaption { display: grid; gap: 6px; color: var(--kg-ink-soft); font-size: 0.92rem; line-height: 1.8; }
.kg-pulse-panel figcaption small { color: var(--kg-ink-faint); font-family: var(--kg-font-ui); font-size: 0.72rem; }
.kg-pulse-spec .kg-video-frame { margin: clamp(36px, 6vw, 72px) 0 0; }

.kg-ma { padding: clamp(76px, 12vw, 164px) 0; scroll-margin-top: 22px; border-bottom: 1px solid var(--kg-line); }
.kg-ma .kg-ma-layout { margin-top: 0; }
.kg-ma h2 { margin: 12px 0 0; color: var(--kg-ink); font-size: clamp(1.8rem, 3.6vw, 3.2rem); font-weight: 500; letter-spacing: -0.04em; line-height: 1.3; }
.kg-ma-copy > p:not(.kg-kicker) { margin: 18px 0 0; color: var(--kg-ink-faint); text-wrap: pretty; }

.kg-origin-header > p:not(.kg-kicker) { max-width: 40rem; margin: 20px 0 0; color: var(--kg-ink-faint); text-wrap: pretty; }
.kg-footer { display: grid; gap: 6px; }
.kg-footer .kg-credit, .kg-footer .kg-copyright { color: var(--kg-ink-faint); font-size: 0.72rem; }

@media (min-width: 740px) {
  .kg-pattern-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .kg-pattern-card--asanoha { grid-column: span 2; grid-row: auto; grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr); align-items: center; }
  .kg-pattern-card--asanoha svg { min-height: 0; max-height: 360px; }
  .kg-yohaku-layout { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .kg-pulse-demo { grid-template-columns: minmax(0, 1fr) minmax(280px, 0.85fr); align-items: start; }
}
@media (max-width: 739px) {
  .kg-nav { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .kg-pattern-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .kg-pattern-card--asanoha { grid-column: 1 / -1; }
  .kg-pattern-card--asanoha svg { max-height: 260px; }
  .kg-pattern-card:not(.kg-pattern-card--asanoha) svg { min-height: 0; }
  .kg-pattern-card:not(.kg-pattern-card--asanoha) h3 small { display: block; margin: 2px 0 0; }
  .kg-pattern-meta div { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .kg-pattern-card:not(.kg-pattern-card--asanoha) > div > p:not(.kg-pattern-origin) { font-size: 0.84rem; }
}
@media (max-width: 480px) {
  .kg-pattern-card { padding: 14px; gap: 12px; }
  .kg-pattern-card h3 { font-size: 1.08rem; }
  .kg-pattern-card p.kg-pattern-origin { font-size: 0.76rem; }
  .kg-pulse-choice span { padding: 0 11px; font-size: 0.76rem; }
  .kg-origin-meta { gap: 8px 18px; }
}
@media (prefers-reduced-motion: reduce) { .kg-pulse-demo.is-charging .kg-pulse-base path { transition: none; } }
.kg-pulse-spec .kg-video-frame { max-width: 760px; }
.kg-definition-intro h2 { font-size: clamp(2rem, 3.6vw, 3.4rem); }
/* 2026-10-02 source-fidelity pass: headings and lists now carry requirement text verbatim */
.kg-section-header h2, .kg-origin-header h2 { font-size: clamp(2rem, 3.6vw, 3.4rem); }
.kg-spec-title { margin: clamp(48px, 7vw, 88px) 0 0; color: var(--kg-ink); font-size: clamp(1.3rem, 2.2vw, 1.8rem); font-weight: 500; }
.kg-video-copy { max-width: 34ch; }
.kg-video-copy strong { font-size: clamp(1rem, 1.8vw, 1.25rem); }
.kg-pillar ul, .kg-guide-copy ul, .kg-yohaku-copy ul { display: grid; gap: 8px; margin: 14px 0 0; padding: 0; list-style: none; }
.kg-pillar li, .kg-guide-copy li, .kg-yohaku-copy li { position: relative; padding-left: 1.2em; color: var(--kg-ink-faint); line-height: 1.8; text-wrap: pretty; }
.kg-pillar li::before, .kg-guide-copy li::before, .kg-yohaku-copy li::before { position: absolute; top: 0.9em; left: 0; width: 0.55em; height: 1px; background: var(--kg-gold); content: ""; }
.kg-yohaku-copy h3, .kg-ma-copy h3 { margin: 0 0 14px; }
.kg-ma-copy h2 { margin-bottom: 6px; }
/* 2026-10-02 asanoha: seamless hero field with a ripple that only travels on the lines; true-square specimen */
.kg-hero-art svg { display: block; width: 100%; height: 100%; }
.kg-art-ripple { color: var(--kg-gold-bright); stroke-width: 2; }
.kg-ripple { opacity: 0; transform-box: fill-box; transform-origin: center; }
.kg-hero-art.is-rippling .kg-ripple { animation: kg-ripple 7.2s cubic-bezier(0.3, 0.15, 0.45, 1) 3; }
.kg-hero-art.is-offscreen .kg-ripple { animation-play-state: paused; }
@keyframes kg-ripple { 0% { opacity: 0; transform: scale(0.02); } 5% { opacity: 1; } 40% { opacity: 0.85; } 72% { opacity: 0; transform: scale(1); } 100% { opacity: 0; transform: scale(1); } }
.kg-pattern-card--asanoha svg { aspect-ratio: 1 / 1; width: min(100%, 360px); height: auto; min-height: 0; max-height: none; margin-inline: auto; }
@media (max-width: 739px) { .kg-pattern-card--asanoha svg { width: min(100%, 260px); max-height: none; } }
@media (prefers-reduced-motion: reduce) { .kg-ripple { animation: none; opacity: 0.75; transform: scale(0.5); } }
/* 2026-10-02 motion budget: no animated filters, every motion runs three times per tap and stops off screen */
.kg-hero-art { cursor: pointer; }
.kg-replay { position: absolute; z-index: 2; display: grid; place-items: center; width: 34px; height: 34px; padding: 0; border: 1px solid var(--kg-gold-line); background: color-mix(in srgb, var(--kg-bg-deep) 82%, transparent); color: var(--kg-gold-bright); cursor: pointer; }
.kg-replay svg { width: 14px; height: 14px; fill: currentColor; }
.kg-replay:focus-visible { outline: 2px solid var(--kg-gold-bright); outline-offset: 2px; }
.kg-replay--hero { top: 12px; right: 12px; }
.kg-replay--stage { top: 10px; right: 10px; }
.kg-pulse-stage { position: relative; }
.kg-ma-comparison { position: relative; }
.kg-ma-comparison .kg-replay { position: static; justify-self: start; }
.kg-ma-track { min-height: 0; align-items: stretch; gap: 6px; }
.kg-ma-track::before { display: none; }
.kg-ma-stage svg { display: block; width: 100%; height: auto; overflow: visible; }
.kg-ma-base { stroke: var(--kg-gold-line); stroke-width: 1.4; }
.kg-ma-heat { stroke: var(--kg-gold); stroke-width: 3; stroke-linecap: round; opacity: 0; }
.kg-ma-node line { stroke: var(--kg-gold-dim); stroke-width: 1.2; stroke-linecap: round; }
.kg-ma-node.is-lit line { stroke: var(--kg-gold-bright); stroke-width: 1.8; }
.kg-ma-packet { stroke: var(--kg-gold-bright); stroke-width: 3; stroke-linecap: round; opacity: 0; }
.kg-ma-stage--frames { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; }
.kg-ma-frame { display: grid; gap: 2px; }
.kg-ma-frame b { color: var(--kg-gold); font-family: var(--kg-font-display); font-size: 0.66rem; font-weight: 500; }
.kg-ma-phases li { transition: background-color 120ms linear; }
.kg-ma-phases li.is-active { background: linear-gradient(90deg, color-mix(in srgb, var(--kg-gold) 16%, transparent), transparent 80%); }
.kg-ma-phases li.is-active b, .kg-ma-phases li.is-active span { color: var(--kg-gold-bright); }
.kg-products { display: grid; gap: clamp(18px, 3vw, 28px); margin-top: clamp(28px, 4vw, 44px); }
.kg-product { display: grid; gap: 12px; align-content: start; padding: clamp(16px, 2.6vw, 26px); border: 1px solid var(--kg-line); background: var(--kg-surface); }
.kg-product h3 { margin: 0; font-size: clamp(1.25rem, 2vw, 1.6rem); font-weight: 500; }
.kg-product h3 a { color: var(--kg-ink); text-decoration: none; border-bottom: 1px solid var(--kg-gold-line); }
.kg-product-url { margin: 0; color: var(--kg-ink-faint); font-family: var(--kg-font-ui); font-size: 0.74rem; }
.kg-product-shots { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.kg-product-shots figure { display: grid; gap: 6px; margin: 0; align-content: start; }
.kg-product-shots img { display: block; width: 100%; height: auto; border: 1px solid var(--kg-line); }
.kg-product-shots figcaption { color: var(--kg-ink-faint); font-family: var(--kg-font-ui); font-size: 0.72rem; }
.kg-product-shots--single { align-items: start; }
.kg-product-facts { display: grid; gap: 0; margin: 0; }
.kg-product-facts div { display: grid; grid-template-columns: 5.5em minmax(0, 1fr); gap: 8px; padding: 8px 0; border-bottom: 1px solid var(--kg-line); font-size: 0.82rem; }
.kg-product-facts dt { color: var(--kg-ink-faint); font-family: var(--kg-font-ui); }
.kg-product-facts dd { margin: 0; color: var(--kg-ink-soft); }
.kg-product-shots--single .kg-product-facts div { grid-template-columns: minmax(0, 1fr); gap: 2px; }
.kg-product-note { margin: 14px 0 0; color: var(--kg-ink-faint); font-family: var(--kg-font-ui); font-size: 0.72rem; }
@media (min-width: 900px) { .kg-products { grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr); } }
@media (prefers-reduced-motion: reduce) { .kg-replay { display: none; } .kg-hero-art { cursor: default; } }

/* Core flash and 空 packets are driven by kumiglow.js (Web Animations, only inside their visible window) to keep idle frames free.
   Hero sequence from the reference footage (2026-10-03): centre node flash -> ring on the lines -> frame pulse -> 空 packets along lattice edges.
   All light stays on existing lines (decision A); colours are palette 金 #D4AF37 and 空 #60A5FA. Same 7.2s x 3 timeline as the ring. */
.kg-ripple-core { opacity: 0; }
.kg-hero-art .kg-hero-trace-layer { position: absolute; inset: 0; display: none; width: 100%; height: 100%; min-height: 0; pointer-events: none; }
.kg-hero-art.is-tracing .kg-hero-trace-layer { display: block; }
.kg-hero-frame { position: absolute; inset: 0; pointer-events: none; border: 2px solid var(--kg-gold); opacity: 0; }
.kg-trace { fill: none; stroke: var(--kg-sky); stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round; stroke-dasharray: 110 4000; stroke-dashoffset: 110; opacity: 0; }
@media (prefers-reduced-motion: reduce) { .kg-ripple-core, .kg-trace, .kg-hero-frame { animation: none !important; opacity: 0; } }

.kg-mask-stop { stop-color: var(--kg-mask-full); }