/* =========================================================
   yomulab.com — editorial / investor-grade hub
   ========================================================= */

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; transition: color 0.15s var(--ease-out); }
h1, h2, h3, h4 {
  line-height: 1.25;
  letter-spacing: -0.015em;
  margin: 0;
  font-weight: 700;
}
.serif { font-family: var(--font-serif); font-weight: 600; letter-spacing: 0; font-style: italic; }

.container {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 32px;
}
.label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-subtle);
  margin-bottom: 14px;
}
.label-inverse { color: rgba(247, 246, 242, 0.55); }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  transition: transform 0.15s var(--ease-out), box-shadow 0.2s var(--ease-out), background 0.15s;
  cursor: pointer;
}
.btn:hover { transform: translateY(-1px); text-decoration: none; }
.btn-primary {
  background: var(--ink);
  color: var(--ink-inverse);
}
.btn-primary:hover {
  background: #000;
  box-shadow: 0 10px 24px -10px rgba(0, 0, 0, 0.4);
}
.btn-primary .btn-arrow { transition: transform 0.2s var(--ease-out); }
.btn-primary:hover .btn-arrow { transform: translateX(4px); }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line-strong);
}
.btn-ghost:hover { background: var(--bg-soft); border-color: var(--ink); }

/* =========================================================
   NAV
   ========================================================= */
.nav {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(247, 246, 242, 0.78);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 16px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  background: var(--ink);
  color: var(--ink-inverse);
  border-radius: 7px;
  font-weight: 900;
  font-size: 0.95rem;
  letter-spacing: 0;
  font-family: var(--font-sans);
}
.brand-word { font-feature-settings: "ss01"; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}
.nav-links a {
  font-size: 0.92rem;
  color: var(--ink-muted);
  font-weight: 500;
  transition: color 0.15s var(--ease-out);
}
.nav-links a:hover { color: var(--ink); }
.nav-links .nav-cta {
  background: var(--ink);
  color: var(--ink-inverse);
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  font-weight: 600;
}
.nav-links .nav-cta:hover { background: #000; color: var(--ink-inverse); }

/* =========================================================
   HERO
   ========================================================= */
.hero {
  padding: 64px 0 0;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 80% 10%, rgba(29, 78, 216, 0.06), transparent 50%),
    radial-gradient(circle at 10% 90%, rgba(200, 162, 74, 0.07), transparent 50%);
}
.hero-grid {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 32px 80px;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}
.hero-copy { min-width: 0; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px 5px 8px;
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--ink-muted);
  text-transform: uppercase;
  margin-bottom: 28px;
}
.eyebrow-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--good);
  box-shadow: 0 0 0 3px rgba(4, 122, 74, 0.18);
  animation: pulse 2.4s var(--ease-in-out) infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(4, 122, 74, 0.18); }
  50%      { box-shadow: 0 0 0 6px rgba(4, 122, 74, 0.05); }
}
.hero-title {
  font-size: clamp(2.6rem, 5.6vw, 4.6rem);
  font-weight: 800;
  letter-spacing: -0.035em;
  margin: 0 0 28px;
  line-height: 1.08;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.hero-line {
  display: inline-flex;
  align-items: baseline;
  gap: 0;
}
.hero-kanji {
  font-weight: 900;
  letter-spacing: -0.04em;
  background: linear-gradient(180deg, var(--ink) 0%, #2a2c31 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-kanji--accent {
  position: relative;
  background: none;
  -webkit-text-fill-color: var(--ink);
  color: var(--ink);
}
.hero-kanji--accent::before {
  content: "";
  position: absolute;
  left: -4px;
  right: -4px;
  bottom: 0.08em;
  height: 0.34em;
  background: var(--highlight);
  border-radius: 2px;
  z-index: -1;
}
.hero-kana {
  font-weight: 700;
  font-size: 0.5em;
  color: var(--ink-muted);
  letter-spacing: 0.02em;
  align-self: flex-end;
  padding-bottom: 0.15em;
  margin-left: 4px;
}
.hero-title-accent {
  display: inline-block;
  background: var(--ink);
  color: var(--ink-inverse);
  padding: 0.08em 0.42em 0.12em;
  border-radius: 8px;
  font-size: 0.62em;
  margin-top: 0.4em;
  letter-spacing: -0.02em;
  font-weight: 800;
  width: fit-content;
}
.hero-lead {
  font-size: clamp(1rem, 1.25vw, 1.1rem);
  color: var(--ink-muted);
  margin: 0 0 36px;
  max-width: 540px;
  line-break: strict;
  word-break: auto-phrase;
}
.hero-cta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 56px;
}
.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, auto);
  gap: 36px;
  margin: 0;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}
.hero-stats > div { min-width: 0; }
.hero-stats dt {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-subtle);
  margin-bottom: 6px;
}
.hero-stats dd {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 1.9rem;
  color: var(--ink);
  line-height: 1;
  letter-spacing: -0.03em;
  font-feature-settings: "tnum";
}
.hero-stats .unit {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--ink-subtle);
  margin-left: 4px;
  letter-spacing: 0;
}

/* hero visual */
.hero-visual {
  position: relative;
  align-self: stretch;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.hero-svg {
  width: 100%;
  height: auto;
  max-width: 540px;
  display: block;
  margin: 0 auto;
  filter: drop-shadow(0 30px 60px rgba(20, 22, 26, 0.12));
  /* sin-wave easing + GPU layer = subpixel-smooth float */
  animation: floaty 9s cubic-bezier(0.45, 0, 0.55, 1) infinite;
  will-change: transform;
  transform: translate3d(0, 0, 0);
  backface-visibility: hidden;
}
@keyframes floaty {
  0%   { transform: translate3d(0, 0, 0); }
  50%  { transform: translate3d(0, -10px, 0); }
  100% { transform: translate3d(0, 0, 0); }
}
.hero-meta {
  display: flex;
  justify-content: space-between;
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-subtle);
  padding: 0 16px;
}

/* ticker removed (was visual noise) */

/* =========================================================
   SECTION shared
   ========================================================= */
section { padding: 112px 0; position: relative; }
.section-head { max-width: 720px; margin-bottom: 56px; }
.section-title {
  font-size: clamp(1.8rem, 3.4vw, 2.6rem);
  margin: 0 0 16px;
  letter-spacing: -0.02em;
}
.section-sub {
  color: var(--ink-muted);
  margin: 0;
  font-size: 1.02rem;
}

/* =========================================================
   CONCEPT (3 yomu)
   ========================================================= */
.concept { background: var(--bg); }
.yomu-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-elevated);
}
.yomu-card {
  padding: 40px 32px 32px;
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: background 0.25s var(--ease-out);
}
.yomu-card:last-child { border-right: none; }
.yomu-card:hover { background: var(--bg); }
.yomu-num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: var(--ink-subtle);
  margin-bottom: 20px;
}
.yomu-kanji {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px dashed var(--line-strong);
}
.yomu-kanji .kanji {
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(2.8rem, 5.2vw, 3.8rem);
  letter-spacing: -0.06em;
  color: var(--ink);
  line-height: 1;
}
.yomu-kanji .ruby {
  font-size: 1rem;
  font-weight: 500;
  color: var(--ink-muted);
  letter-spacing: 0;
}
.yomu-h {
  font-size: 1.1rem;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}
.yomu-p {
  margin: 0 0 24px;
  color: var(--ink-muted);
  font-size: 0.95rem;
  line-height: 1.75;
  flex: 1;
}
.yomu-foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 0.88rem;
}
.chip {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
}
.chip-live { background: #d8f3e3; color: var(--good); }
.chip-soon { background: var(--gold-soft); color: #6f5212; border: 1px solid #d9c081; }
.chip-research { background: var(--brand-tint); color: var(--brand-deep); }
.link {
  font-weight: 600;
  color: var(--brand);
  position: relative;
}
.link:hover { color: var(--brand-deep); }
.link-mute {
  color: var(--ink-subtle);
  font-weight: 600;
}

/* =========================================================
   MANIFESTO (inverted)
   ========================================================= */
.manifesto {
  background: var(--bg-deep);
  color: var(--ink-inverse);
  border-top: 1px solid var(--line-inverse);
  border-bottom: 1px solid var(--line-inverse);
}
.manifesto-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 64px;
  align-items: start;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 32px;
}
.manifesto-title {
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: -0.025em;
  margin: 0;
  color: var(--ink-inverse);
  font-weight: 800;
  line-height: 1.2;
}
.manifesto-body p {
  color: rgba(247, 246, 242, 0.7);
  margin: 0 0 24px;
  font-size: 1.02rem;
  line-height: 1.8;
}
.manifesto-list {
  list-style: none;
  padding: 0;
  margin: 32px 0 0;
  border-top: 1px solid var(--line-inverse);
}
.manifesto-list li {
  padding: 18px 0;
  border-bottom: 1px solid var(--line-inverse);
  color: rgba(247, 246, 242, 0.8);
  font-size: 0.98rem;
}
.manifesto-list li b {
  color: var(--ink-inverse);
  font-weight: 600;
  margin-right: 8px;
}

/* =========================================================
   PRODUCTS
   ========================================================= */
.products { background: var(--bg); }
.product-list {
  border-top: 1px solid var(--ink);
}
.product-row {
  display: grid;
  grid-template-columns: 140px 1fr 80px;
  gap: 32px;
  align-items: center;
  padding: 36px 0;
  border-bottom: 1px solid var(--line);
  transition: padding 0.2s var(--ease-out), background 0.2s var(--ease-out);
  color: inherit;
}
.product-row--live { cursor: pointer; }
.product-row--live:hover {
  background: var(--bg-elevated);
  padding-left: 16px;
  padding-right: 16px;
  margin: 0 -16px;
}
.product-row--live:hover .arrow-pill {
  background: var(--ink);
  color: var(--ink-inverse);
  transform: translateX(4px);
}
.product-row--disabled { opacity: 0.55; }

.product-row-meta {
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: flex-start;
}
.product-code {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: var(--ink-subtle);
}

.product-name {
  font-size: clamp(1.3rem, 2.2vw, 1.7rem);
  margin: 0 0 6px;
  letter-spacing: -0.01em;
  display: flex;
  align-items: baseline;
  gap: 16px;
  flex-wrap: wrap;
  font-weight: 800;
}
.product-name-en {
  font-family: var(--font-serif);
  font-weight: 600;
  font-style: italic;
  letter-spacing: 0;
}
.product-domain {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-subtle);
  letter-spacing: 0.04em;
  font-weight: 400;
}
.product-tag {
  margin: 6px 0 14px;
  color: var(--ink-muted);
  font-size: 1rem;
  max-width: 640px;
}
.product-tech {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--ink-subtle);
  text-transform: uppercase;
}
.product-tech span:nth-child(even) { color: var(--line-strong); }

.product-row-cta {
  text-align: right;
}
.arrow-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--ink);
  color: var(--ink);
  font-size: 1.1rem;
  transition: all 0.2s var(--ease-out);
}

.product-more {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 32px;
  padding: 14px 22px;
  background: var(--bg-elevated);
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius-pill);
  font-size: 0.92rem;
  color: var(--ink-muted);
}
.product-more a {
  color: var(--brand);
  font-weight: 600;
  margin-left: 4px;
}
.product-more a:hover { color: var(--brand-deep); }
.product-more-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 3px rgba(200, 162, 74, 0.18);
}

/* =========================================================
   RESEARCH
   ========================================================= */
.research {
  background: var(--bg-elevated);
  border-top: 1px solid var(--line);
}
.research-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.research-card {
  padding: 32px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  transition: transform 0.2s var(--ease-out), border-color 0.2s;
}
.research-card:hover {
  transform: translateY(-2px);
  border-color: var(--ink);
}
.research-card--ghost { opacity: 0.55; }
.research-card--ghost:hover { transform: none; border-color: var(--line); }
.research-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--ink-subtle);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.research-tag {
  background: var(--brand-tint);
  color: var(--brand-deep);
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  text-transform: none;
  letter-spacing: 0;
  font-family: var(--font-sans);
  font-weight: 600;
}
.research-title {
  font-size: 1.3rem;
  margin-bottom: 14px;
  line-height: 1.45;
  font-weight: 800;
  letter-spacing: -0.01em;
}
.research-excerpt {
  color: var(--ink-muted);
  margin: 0 0 24px;
  font-size: 0.95rem;
  flex: 1;
}
.research-cta { margin-top: auto; }

/* =========================================================
   ABOUT
   ========================================================= */
.about { background: var(--bg); }
.about-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 64px;
  align-items: start;
}
.about-body p {
  color: var(--ink-muted);
  max-width: 640px;
}
.about-links {
  display: flex;
  gap: 28px;
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}
.about-links a {
  font-weight: 600;
  color: var(--ink);
}
.about-links a:hover { color: var(--brand); }

/* =========================================================
   FOOTER
   ========================================================= */
.footer {
  background: var(--bg-deep);
  color: rgba(247, 246, 242, 0.6);
  padding: 64px 0 32px;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.2fr 1.5fr;
  gap: 48px;
}
.footer-brand .brand { color: var(--ink-inverse); }
.footer-tagline {
  margin-top: 14px;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 0.95rem;
  color: rgba(247, 246, 242, 0.5);
}
.footer-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}
.footer-cols > div { display: flex; flex-direction: column; gap: 10px; }
.footer-cols a { color: rgba(247, 246, 242, 0.7); font-size: 0.92rem; }
.footer-cols a:hover { color: var(--ink-inverse); }
.footer-col-h {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(247, 246, 242, 0.4);
  margin-bottom: 6px;
}
.footer-mute {
  color: rgba(247, 246, 242, 0.3);
  font-size: 0.92rem;
}
.footer-bottom {
  grid-column: 1 / -1;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--line-inverse);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.82rem;
  color: rgba(247, 246, 242, 0.4);
}

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width: 960px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 48px;
    padding-bottom: 56px;
  }
  .hero-visual { order: -1; }
  .hero-svg { max-width: 420px; }
  .manifesto-grid,
  .about-grid,
  .footer-inner { grid-template-columns: 1fr; gap: 40px; }
  .yomu-grid { grid-template-columns: 1fr; }
  .yomu-card { border-right: none; border-bottom: 1px solid var(--line); }
  .yomu-card:last-child { border-bottom: none; }
  .research-list { grid-template-columns: 1fr; }
  .product-row {
    grid-template-columns: 90px 1fr 50px;
    gap: 20px;
  }
}
@media (max-width: 640px) {
  section { padding: 72px 0; }
  .container, .nav-inner, .hero-grid { padding-left: 20px; padding-right: 20px; }
  .nav-links { gap: 12px; }
  .nav-links a:not(.nav-cta) { display: none; }
  .hero { padding-top: 40px; }
  .hero-stats { grid-template-columns: 1fr 1fr; gap: 24px; }
  .hero-stats > div:last-child { grid-column: 1 / -1; }
  .product-row {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .product-row-cta { display: none; }
  .product-name { font-size: 1.2rem; }
  .footer-cols { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  .hero-svg, .eyebrow-dot { animation: none; }
}