:root {
  --sumi: #0d1b20;
  --sumi-2: #183039;
  --paper: #faf6ee;
  --paper-2: #e8dfcf;
  --white: #fffdf8;
  --muted: #5f6b75;
  --red: #e23d2b;
  --red-ink: #d53222;
  --red-dark: #b92b1f;
  --red-soft: #f07768;
  --moss: #2f5d4a;
  --moss-soft: #4a7a64;
  --gold: #ebc24b;
  --gold-on-dark: #f2ca50;
  --line: rgba(22, 37, 53, 0.14);
  --line-strong: rgba(22, 37, 53, 0.28);
  --line-dark: rgba(255, 253, 248, 0.16);
  --max: 1180px;
  --gutter: clamp(1rem, 3.2vw, 1.6rem);
  --header-h: 4.5rem;
  --serif: "Hiragino Mincho ProN", "Yu Mincho", "YuMincho", "Noto Serif JP", "Hiragino Mincho Pro", serif;
  --sans: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", "YuGothic", "Noto Sans JP", Meiryo, system-ui, sans-serif;
  --mono: "SFMono-Regular", ui-monospace, Menlo, Consolas, monospace;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 5rem; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  color: var(--sumi);
  background: var(--paper);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.8;
  letter-spacing: 0.02em;
  -webkit-font-smoothing: antialiased;
}
.keep { white-space: nowrap; }
body.menu-open { overflow: hidden; }
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, p { margin: 0; }
::selection { background: var(--red-dark); color: #fff; }
:focus-visible { outline: 3px solid var(--gold); outline-offset: 3px; }

.skip {
  position: fixed; top: 10px; left: 10px; z-index: 200;
  padding: 10px 14px; background: var(--sumi); color: #fff;
  transform: translateY(-160%);
}
.skip:focus { transform: none; }

.shell {
  width: min(var(--max), calc(100% - var(--gutter) * 2));
  margin-inline: auto;
}

/* —— Header —— */
.site-header {
  position: sticky; top: 0; z-index: 80;
  height: var(--header-h);
  background: rgba(244, 239, 230, 0.96);
  border-bottom: 1px solid var(--line-strong);
}
.header-inner {
  height: 100%;
  display: flex; align-items: center; gap: 1rem;
}
.brand {
  display: inline-flex; align-items: center;
  margin-right: auto; min-height: 44px;
}
.brand-logo {
  width: clamp(9.5rem, 15vw, 11.5rem);
  height: auto;
}
.nav {
  display: none;
  align-items: center; gap: 1.2rem;
  font-size: 0.84rem; font-weight: 700;
}
.nav a:not(.nav-cta) {
  min-height: 44px; display: inline-flex; align-items: center;
  position: relative;
}
.nav a:not(.nav-cta)::after {
  content: ""; position: absolute; left: 0; right: 100%; bottom: 10px;
  height: 2px; background: var(--red); transition: right 0.2s var(--ease);
}
.nav a:not(.nav-cta):hover::after { right: 0; }
.nav-cta {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 42px; padding: 0 1rem;
  background: var(--red-ink); color: #fff;
  transition: background 0.18s var(--ease);
}
.nav-cta:hover { background: var(--red-dark); }
.menu-btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 44px; min-height: 44px; padding: 0 0.75rem;
  border: 1px solid var(--line-strong);
  font-family: var(--mono); font-size: 0.7rem; font-weight: 800; letter-spacing: 0.12em;
}
.nav-mobile {
  display: none;
  position: absolute; left: 0; right: 0; top: var(--header-h);
  background: var(--white);
  border-bottom: 1px solid var(--line-strong);
  padding: 0.4rem var(--gutter) 1rem;
  box-shadow: 0 18px 40px rgba(22, 37, 53, 0.08);
  max-height: calc(100vh - var(--header-h));
  max-height: calc(100dvh - var(--header-h));
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
}
.nav-mobile.open { display: grid; gap: 0.1rem; }
.nav-mobile a {
  display: flex; align-items: center;
  min-height: 48px;
  border-bottom: 1px solid var(--line);
  font-weight: 700;
}
.nav-mobile .nav-cta {
  margin-top: 0.7rem; justify-content: center; border: 0;
}
@media (min-width: 960px) {
  .nav { display: flex; }
  .menu-btn { display: none; }
  .nav-mobile { display: none !important; }
}

/* —— Buttons —— */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.65rem;
  min-height: 52px; padding: 0.75rem 1.25rem;
  border: 1px solid transparent;
  font-size: 0.9rem; font-weight: 800;
  transition: transform 0.18s var(--ease), background 0.18s var(--ease), color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.btn .arrow { font-family: var(--mono); font-size: 1rem; line-height: 1; }
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: var(--red-ink); color: #fff; border-color: var(--red-ink);
}
.btn-primary:hover { background: var(--red-dark); border-color: var(--red-dark); }
.btn-dark {
  background: var(--sumi); color: #fff; border-color: var(--sumi);
}
.btn-dark:hover { background: var(--sumi-2); }
.btn-outline {
  background: transparent; color: var(--sumi); border-color: var(--line-strong);
}
.btn-outline:hover { border-color: var(--red); color: var(--red-ink); }
.btn-ghost-light {
  background: transparent; color: #fff; border-color: rgba(255,255,255,0.45);
}
.btn-ghost-light:hover { background: #fff; color: var(--sumi); border-color: #fff; }
.btn-gold {
  background: var(--gold); color: var(--sumi); border-color: var(--gold);
}
.btn-gold:hover { filter: brightness(1.05); }

/* —— Hero —— */
.hero {
  position: relative;
  border-bottom: 1px solid var(--line-strong);
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 55% 50% at 92% 8%, rgba(189, 56, 45, 0.1), transparent 58%),
    radial-gradient(ellipse 40% 35% at 0% 100%, rgba(47, 93, 74, 0.07), transparent 55%);
  pointer-events: none;
}
.hero-inner {
  position: relative; z-index: 1;
  display: grid; gap: 2.5rem;
  padding: 3.6rem 0 3.8rem;
}
@media (min-width: 980px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(340px, 0.95fr);
    align-items: center; gap: 3.2rem;
    min-height: 640px;
    padding: 4.5rem 0 4.8rem;
  }
}
.eyebrow {
  display: flex; align-items: center; gap: 0.75rem;
  color: var(--red-ink);
  font: 800 0.72rem/1.4 var(--mono);
  letter-spacing: 0.14em; text-transform: uppercase;
}
.eyebrow::before {
  content: ""; width: 2rem; height: 2px; background: var(--red);
}
h1 {
  margin: 1.1rem 0 1.25rem;
  max-width: 14ch;
  font-family: var(--serif);
  font-size: clamp(2.35rem, 5.8vw, 4.6rem);
  line-height: 1.18;
  letter-spacing: -0.03em;
  font-weight: 700;
}
h1 em {
  font-style: normal;
  color: var(--red);
}
.hero-lead {
  max-width: 38rem;
  color: var(--muted);
  font-size: clamp(0.98rem, 1.4vw, 1.12rem);
  line-height: 1.9;
}
.hero-lead strong { color: var(--sumi); font-weight: 700; }
.hero-actions {
  display: flex; flex-wrap: wrap; gap: 0.7rem;
  margin-top: 1.9rem;
}
.hero-meta {
  display: flex; flex-wrap: wrap; gap: 0.55rem 1.35rem;
  margin-top: 1.8rem;
  color: var(--muted);
  font: 700 0.72rem/1.5 var(--mono);
  letter-spacing: 0.06em;
}
.hero-meta span::before {
  content: "●"; margin-right: 0.45rem; color: var(--red); font-size: 0.55rem;
}
.hero-philosophy {
  margin-top: 1.35rem;
  padding: 0.85rem 1rem;
  border-left: 3px solid var(--gold);
  background: rgba(255, 253, 248, 0.7);
  color: var(--muted);
  font-size: 0.88rem;
}
.hero-philosophy strong {
  display: block;
  margin-bottom: 0.2rem;
  color: var(--sumi);
  font-family: var(--serif);
  font-size: 0.98rem;
  letter-spacing: 0.04em;
}

/* 運営台帳 */
.ledger {
  position: relative;
  background: var(--white);
  border: 1px solid var(--line-strong);
  box-shadow: 14px 16px 0 rgba(22, 37, 53, 0.06);
  padding: 1.4rem 1.35rem 1.3rem;
}
.ledger-stamp {
  position: absolute; right: 1rem; top: 1rem;
  padding: 0.28rem 0.5rem;
  border: 2px solid var(--red);
  color: var(--red-ink);
  font: 800 0.62rem/1 var(--mono);
  letter-spacing: 0.1em;
  transform: rotate(4deg);
}
.ledger-title {
  margin: 0.15rem 0 0.2rem;
  font-family: var(--serif);
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.ledger-sub {
  margin-bottom: 1.2rem;
  color: var(--muted);
  font-size: 0.8rem;
}
.ledger-list {
  border-top: 2px solid var(--sumi);
}
.ledger-row {
  display: grid;
  grid-template-columns: 5.2rem 1fr auto;
  gap: 0.85rem;
  align-items: center;
  min-height: 3.35rem;
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--line);
}
.ledger-row b {
  color: var(--red-ink);
  font: 800 0.66rem/1.3 var(--mono);
  letter-spacing: 0.08em;
}
.ledger-row span {
  font-size: 0.9rem;
  font-weight: 700;
}
.ledger-row i {
  width: 0.55rem; height: 0.55rem;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(184, 148, 63, 0.14);
  font-style: normal;
}
.ledger-foot {
  margin-top: 1rem;
  padding: 0.9rem 0.95rem;
  background: var(--paper);
  border-left: 4px solid var(--red);
  font-size: 0.86rem;
  color: var(--muted);
}
.ledger-foot strong { color: var(--sumi); }
.ledger-bound {
  display: flex; flex-wrap: wrap; gap: 0.5rem 1rem;
  margin-top: 0.85rem;
  font: 700 0.68rem/1.4 var(--mono);
  letter-spacing: 0.05em;
  color: var(--muted);
}
.ledger-bound em {
  font-style: normal;
  color: var(--moss);
}

/* —— Cap strip —— */
.cap-strip {
  color: #fff; background: var(--red-ink); overflow: hidden;
  border-bottom: 1px solid var(--sumi);
}
.cap-track {
  min-height: 46px;
  display: flex; align-items: center; gap: 2rem;
  white-space: nowrap;
  font: 800 0.68rem/1 var(--mono); letter-spacing: 0.12em;
}
.cap-track span {
  display: inline-flex; align-items: center; gap: 2rem;
}
.cap-track span::after {
  content: "×"; font-size: 0.95rem; color: rgba(255,255,255,0.65);
}

/* —— Sections —— */
.section {
  padding: clamp(3.4rem, 6.5vw, 5.8rem) 0;
  border-bottom: 1px solid var(--line);
}
.section.soft { background: var(--white); }
.section.dark {
  color: #fff;
  background: var(--sumi);
  border-color: var(--line-dark);
}
.section.moss {
  color: #fff;
  background: var(--moss);
  border-color: rgba(255,255,255,0.12);
}
.section-kicker {
  display: flex; align-items: center; gap: 0.7rem;
  margin: 0 0 1.2rem;
  color: var(--red-ink);
  font: 800 0.68rem/1 var(--mono);
  letter-spacing: 0.12em; text-transform: uppercase;
}
.section-kicker::before {
  content: ""; width: 10px; height: 10px;
  border: 2px solid currentColor;
}
.dark .section-kicker,
.moss .section-kicker { color: var(--gold-on-dark); }
.section-head {
  display: grid; gap: 1.2rem;
  margin-bottom: 2.4rem;
}
@media (min-width: 860px) {
  .section-head {
    grid-template-columns: minmax(0, 1.2fr) minmax(240px, 0.8fr);
    align-items: end; gap: 2.5rem;
    margin-bottom: 3rem;
  }
}
h2 {
  font-family: var(--serif);
  font-size: clamp(1.7rem, 3.8vw, 3rem);
  line-height: 1.28;
  letter-spacing: -0.02em;
  font-weight: 700;
}
.section-lead {
  max-width: 38rem;
  color: var(--muted);
  font-size: 0.95rem;
}
.dark .section-lead,
.moss .section-lead { color: rgba(255,253,248,0.72); }

/* Problems / breakpoints */
.problem-grid {
  display: grid; gap: 0.85rem;
}
@media (min-width: 760px) {
  .problem-grid { grid-template-columns: 1fr 1fr; }
}
@media (min-width: 1040px) {
  .problem-grid { grid-template-columns: repeat(4, 1fr); }
}
.problem {
  min-height: 210px;
  padding: 1.35rem 1.25rem 1.4rem;
  border: 1px solid var(--line-strong);
  background: var(--white);
  display: flex; flex-direction: column; gap: 0.75rem;
  position: relative;
  overflow: hidden;
}
.problem::before {
  content: "";
  position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: var(--red);
}
.problem .code {
  color: var(--red-ink);
  font: 800 0.68rem/1 var(--mono); letter-spacing: 0.08em;
}
.problem h3 {
  font-size: 1.05rem; line-height: 1.45; letter-spacing: 0.01em;
}
.problem p {
  margin-top: auto;
  color: var(--muted); font-size: 0.88rem;
}

/* Capabilities */
.cap-grid {
  display: grid; gap: 0.85rem;
}
@media (min-width: 820px) {
  .cap-grid { grid-template-columns: 1fr 1fr; }
}
.cap-card {
  min-height: 280px;
  padding: 1.5rem 1.4rem 1.5rem;
  border: 1px solid var(--line-strong);
  background: var(--white);
  display: flex; flex-direction: column; gap: 0.85rem;
}
.cap-card.highlight {
  color: #fff;
  background: var(--sumi);
  border-color: var(--sumi);
}
.cap-id {
  color: var(--red-ink);
  font: 800 0.68rem/1 var(--mono); letter-spacing: 0.1em;
}
.cap-card.highlight .cap-id { color: var(--red-soft); }
.cap-card h3 {
  font-family: var(--serif);
  font-size: clamp(1.25rem, 2vw, 1.55rem);
  line-height: 1.3;
  letter-spacing: 0.02em;
}
.cap-card > p {
  color: var(--muted); font-size: 0.92rem;
}
.cap-card.highlight > p { color: #b8c0c8; }
.tags {
  display: flex; flex-wrap: wrap; gap: 0.4rem;
  margin-top: auto;
}
.tags span {
  padding: 0.32rem 0.5rem;
  border: 1px solid var(--line-strong);
  color: var(--muted);
  font: 700 0.66rem/1 var(--mono);
}
.cap-card.highlight .tags span {
  color: #c5ccd3; border-color: #4a5763;
}
.cap-card .cap-link {
  margin-top: 0.2rem;
  font-size: 0.88rem; font-weight: 800; color: var(--gold-on-dark);
}
.cap-card .cap-link:hover { text-decoration: underline; }

/* Flow */
.flow-track {
  display: grid; gap: 0;
  border-top: 1px solid rgba(255,255,255,0.35);
  border-left: 1px solid rgba(255,255,255,0.35);
}
@media (min-width: 900px) {
  .flow-track { grid-template-columns: repeat(6, 1fr); }
}
.flow-step {
  position: relative;
  min-height: 210px;
  padding: 1.25rem 1.05rem;
  border-right: 1px solid rgba(255,255,255,0.35);
  border-bottom: 1px solid rgba(255,255,255,0.35);
  display: flex; flex-direction: column;
}
.flow-step::before {
  content: "";
  position: absolute; left: 1.05rem; top: -4px;
  width: 8px; height: 8px; background: var(--gold);
}
.flow-step .n {
  color: var(--gold-on-dark);
  font: 800 0.68rem/1 var(--mono); letter-spacing: 0.08em;
}
.flow-step h3 {
  margin-top: auto;
  margin-bottom: 0.55rem;
  font-size: 1.02rem;
  line-height: 1.4;
}
.flow-step p { color: rgba(255,253,248,0.7); font-size: 0.82rem; }
.feedback {
  margin-top: 1.5rem;
  padding: 1.35rem 1.4rem;
  display: grid; gap: 1rem;
  border: 1px solid rgba(255,255,255,0.28);
  background: rgba(0,0,0,0.12);
}
@media (min-width: 720px) {
  .feedback {
    grid-template-columns: auto 1fr;
    align-items: center; gap: 2rem;
  }
}
.feedback strong {
  font-family: var(--serif);
  font-size: clamp(1.3rem, 2.5vw, 1.8rem);
  color: var(--gold-on-dark);
  letter-spacing: 0.03em;
}
.feedback p { color: rgba(255,253,248,0.78); font-size: 0.92rem; }

/* Channels */
.channel-layout {
  display: grid; gap: 2rem;
}
@media (min-width: 900px) {
  .channel-layout {
    grid-template-columns: 0.9fr 1.1fr;
    gap: 3rem;
    align-items: start;
  }
}
.channel-copy .section-kicker { margin-bottom: 1rem; }
.channel-copy h2 { margin-bottom: 1rem; }
.channel-list {
  border-top: 2px solid var(--sumi);
}
.channel-row {
  display: grid;
  grid-template-columns: 8.5rem 1fr;
  gap: 1.1rem;
  padding: 1.05rem 0;
  border-bottom: 1px solid var(--line);
}
@media (max-width: 560px) {
  .channel-row { grid-template-columns: 1fr; gap: 0.3rem; }
}
.channel-row b {
  color: var(--red-ink);
  font: 800 0.7rem/1.5 var(--mono);
  letter-spacing: 0.08em;
}
.channel-row span {
  font-size: 1rem; font-weight: 700;
}
.channel-row small {
  display: block;
  margin-top: 0.2rem;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 500;
}
.channel-note {
  margin-top: 1.1rem;
  padding: 0.95rem 1.05rem;
  background: color-mix(in srgb, var(--red) 7%, var(--paper));
  border: 1px solid color-mix(in srgb, var(--red) 18%, var(--line));
  font-size: 0.86rem;
  color: var(--muted);
}
.channel-note strong { color: var(--sumi); }

/* Projects */
.project-grid {
  display: grid; gap: 0.9rem;
}
@media (min-width: 760px) {
  .project-grid { grid-template-columns: 1fr 1fr; }
}
.project {
  min-height: 320px;
  padding: 1.5rem;
  border: 1px solid var(--line-strong);
  background: var(--white);
  display: flex; flex-direction: column;
}
.project-top {
  display: flex; justify-content: space-between; gap: 1rem;
  font: 800 0.68rem/1 var(--mono); letter-spacing: 0.08em;
}
.project-top .status { color: var(--red-ink); }
.project-top .domain { color: var(--muted); }
.project h3 {
  margin: 2.6rem 0 0.85rem;
  font-family: var(--serif);
  font-size: clamp(1.5rem, 2.5vw, 1.9rem);
  letter-spacing: 0.02em;
}
.project > p {
  color: var(--muted); font-size: 0.92rem;
}
.project .scope {
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  font: 700 0.78rem/1.5 var(--mono);
  color: #4e5b64;
  letter-spacing: 0.02em;
}
.project .scope strong {
  display: block;
  margin-bottom: 0.25rem;
  color: var(--muted);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
}
.project-link {
  width: fit-content;
  margin-top: 1rem;
  color: var(--red-ink);
  border-bottom: 1px solid color-mix(in srgb, var(--red) 35%, transparent);
  font: 800 0.76rem/1.5 var(--mono);
  letter-spacing: 0.04em;
}
a.project-link:hover { border-color: var(--red); }
.project-link-static {
  color: var(--muted);
  border-bottom: 0;
}

.role-statement {
  margin-top: 1.35rem;
  padding: 1.15rem 1.25rem;
  border: 1px solid var(--line-strong);
  border-left: 4px solid var(--red);
  background: var(--white);
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
}
.role-statement strong {
  font-family: var(--serif);
  font-size: clamp(1.2rem, 2.5vw, 1.65rem);
  line-height: 1.5;
  letter-spacing: 0.02em;
}
.role-statement span {
  color: var(--red-ink);
  font: 800 0.76rem/1.5 var(--mono);
  letter-spacing: 0.06em;
}

/* CrossHub */
.cross-card {
  display: grid; gap: 1.5rem;
  padding: 1.8rem 1.5rem;
  background: var(--white);
  border: 1px solid var(--line-strong);
  box-shadow: 12px 12px 0 rgba(22, 37, 53, 0.05);
}
@media (min-width: 860px) {
  .cross-card {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 2.5rem;
    align-items: center;
    padding: 2.2rem 2rem;
  }
}
.cross-card .section-kicker { margin-bottom: 0.9rem; }
.cross-card h2 {
  margin-bottom: 0.85rem;
  font-size: clamp(1.55rem, 3vw, 2.4rem);
}
.cross-card > div > p {
  color: var(--muted); font-size: 0.95rem; max-width: 40rem;
}
.boundary {
  margin-top: 1.1rem;
  padding: 0.9rem 1rem;
  border-left: 4px solid var(--gold);
  background: var(--paper);
  font-size: 0.88rem;
  line-height: 1.7;
}
.boundary strong { color: var(--sumi); }
.cross-actions {
  display: grid; gap: 0.65rem;
}
.cross-actions .btn { width: 100%; }

/* Company facts from live site */
.company-grid {
  display: grid; gap: 0.85rem;
}
@media (min-width: 720px) {
  .company-grid { grid-template-columns: 1.1fr 0.9fr; }
}
.company-table {
  border-top: 2px solid var(--sumi);
}
.company-row {
  display: grid;
  grid-template-columns: 7.5rem 1fr;
  gap: 1rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.92rem;
}
@media (max-width: 520px) {
  .company-row { grid-template-columns: 1fr; gap: 0.2rem; }
}
.company-row dt {
  color: var(--muted);
  font: 800 0.7rem/1.5 var(--mono);
  letter-spacing: 0.08em;
}
.company-row dd { margin: 0; font-weight: 700; }
.company-panel {
  padding: 1.4rem 1.3rem;
  background: var(--sumi);
  color: #fff;
  min-height: 100%;
  display: flex; flex-direction: column; gap: 0.85rem;
}
.company-panel .label {
  color: var(--gold-on-dark);
  font: 800 0.68rem/1 var(--mono); letter-spacing: 0.1em;
}
.company-panel a {
  color: #fff;
  font-weight: 800;
  border-bottom: 1px solid rgba(255,255,255,0.35);
  width: fit-content;
}
.company-panel a:hover { border-color: var(--gold-on-dark); color: var(--gold-on-dark); }
.company-panel p {
  color: rgba(255,253,248,0.72);
  font-size: 0.88rem;
}
.company-panel .source {
  margin-top: auto;
  padding-top: 0.8rem;
  border-top: 1px solid rgba(255,255,248,0.15);
  color: rgba(255,253,248,0.5);
  font: 700 0.66rem/1.4 var(--mono);
  letter-spacing: 0.06em;
}

/* Network */
.network-grid {
  display: grid; gap: 0.85rem;
}
@media (min-width: 760px) {
  .network-grid { grid-template-columns: repeat(3, 1fr); }
}
.network-card {
  min-height: 220px;
  padding: 1.4rem 1.25rem 1.35rem;
  border: 1px solid var(--line-strong);
  background: var(--white);
  display: flex; flex-direction: column; gap: 0.55rem;
  transition: border-color 0.18s var(--ease), transform 0.18s var(--ease);
}
a.network-card:hover {
  border-color: var(--red);
  transform: translateY(-2px);
}
.network-card .role {
  color: var(--moss);
  font: 800 0.68rem/1 var(--mono); letter-spacing: 0.1em;
}
.network-card h3 {
  font-family: var(--serif);
  font-size: 1.25rem;
  letter-spacing: 0.03em;
}
.network-card p {
  color: var(--muted); font-size: 0.88rem; flex: 1;
}
.network-card .go {
  margin-top: 0.4rem;
  color: var(--red-ink);
  font-size: 0.84rem; font-weight: 800;
}
.legal-note {
  margin-top: 1.25rem;
  padding: 0.95rem 1.05rem;
  background: var(--paper-2);
  border: 1px solid var(--line);
  font-size: 0.86rem;
  color: var(--muted);
}
.legal-note strong { color: var(--sumi); }

/* Final CTA */
.final-cta {
  padding: clamp(3.6rem, 7vw, 5.5rem) 0;
  color: #fff;
  background:
    radial-gradient(ellipse 50% 60% at 90% 20%, rgba(255,255,255,0.08), transparent 55%),
    var(--red-dark);
}
.final-inner {
  display: grid; gap: 1.8rem;
}
@media (min-width: 860px) {
  .final-inner {
    grid-template-columns: 1.25fr 0.75fr;
    align-items: end; gap: 2.5rem;
  }
}
.final-cta .section-kicker { color: rgba(255,255,255,0.9); }
.final-cta h2 {
  font-size: clamp(2rem, 4.5vw, 3.4rem);
  margin-bottom: 0.9rem;
}
.final-cta p {
  color: rgba(255,255,255,0.85);
  max-width: 38rem;
  font-size: 0.98rem;
}
.final-actions {
  display: grid; gap: 0.65rem;
}
.final-actions .btn {
  width: 100%;
  background: #fff; color: var(--sumi); border-color: #fff;
}
.final-actions .btn:hover { background: var(--paper); }
.final-actions .btn-ghost-light {
  background: transparent; color: #fff; border-color: rgba(255,255,255,0.55);
}
.final-actions .btn-ghost-light:hover {
  background: #fff; color: var(--sumi);
}
.final-contact {
  margin-top: 0.4rem;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.85);
  line-height: 1.7;
}
.final-contact a {
  color: #fff;
  border-bottom: 1px solid rgba(255,255,255,0.4);
  font-weight: 700;
}

/* Footer */
.site-footer {
  padding: 2.4rem 0 2rem;
  background: var(--sumi);
  color: rgba(255,253,248,0.62);
  font-size: 0.84rem;
}
.footer-grid {
  display: grid; gap: 1.8rem;
}
@media (min-width: 800px) {
  .footer-grid {
    grid-template-columns: 1.3fr 1fr 1fr;
    gap: 2rem;
  }
}
.footer-logo {
  width: min(15.5rem, 100%);
  height: auto;
}
.footer-brand p {
  margin-top: 0.75rem;
  max-width: 28rem;
  line-height: 1.75;
}
.footer-col h3 {
  margin: 0 0 0.75rem;
  color: rgba(255,253,248,0.5);
  font: 800 0.68rem/1 var(--mono);
  letter-spacing: 0.12em;
}
.footer-col ul { display: grid; gap: 0.45rem; }
.footer-col a {
  color: rgba(255,253,248,0.78);
}
.footer-col a:hover { color: #fff; }
.footer-bottom {
  margin-top: 2rem;
  padding-top: 1.2rem;
  border-top: 1px solid rgba(255,253,248,0.12);
  display: flex; flex-wrap: wrap; gap: 0.75rem 1.4rem;
  justify-content: space-between; align-items: center;
  font-size: 0.78rem;
  color: rgba(255,253,248,0.5);
}
.footer-net {
  display: flex; flex-wrap: wrap; gap: 0.5rem 1rem;
}
.footer-net a { color: rgba(255,253,248,0.62); }
.footer-net a:hover { color: #fff; }

/* Back to top — long-page utility; sumi/red, not another brand blue */
.back-to-top {
  position: fixed;
  right: 28px;
  bottom: 32px;
  z-index: 60;
  display: grid;
  width: 44px;
  height: 44px;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity 180ms var(--ease), transform 180ms var(--ease);
}
.back-to-top.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}
.back-to-top__button {
  display: grid;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid rgba(13, 27, 32, 0.16);
  border-radius: 50%;
  color: var(--sumi);
  background: rgba(255, 253, 248, 0.92);
  box-shadow: 0 6px 20px rgba(13, 27, 32, 0.14);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  cursor: pointer;
  place-items: center;
  transition: color 160ms var(--ease), background-color 160ms var(--ease),
    border-color 160ms var(--ease), box-shadow 160ms var(--ease);
}
.back-to-top__button span {
  display: block;
  font-family: var(--mono);
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1;
  transform: translateY(1px);
}
.back-to-top__button:hover {
  color: #fff;
  border-color: transparent;
  background: var(--red-ink);
  box-shadow: 0 8px 22px rgba(213, 50, 34, 0.28);
}
.back-to-top__button:active {
  background: var(--red-dark);
  box-shadow: inset 0 2px 0 rgba(13, 27, 32, 0.12);
}
.back-to-top__button:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 3px;
}

@media (max-width: 620px) {
  .hero-actions { display: grid; }
  .hero-actions .btn { width: 100%; }
  .ledger { box-shadow: 8px 8px 0 rgba(22, 37, 53, 0.06); }
  .ledger-row { grid-template-columns: 4.4rem 1fr; }
  .ledger-row i { display: none; }
  .flow-step { min-height: auto; }
  .project { min-height: 280px; }
  .back-to-top {
    right: 16px;
    bottom: max(20px, calc(20px + env(safe-area-inset-bottom)));
    width: 46px;
    height: 46px;
  }
  .back-to-top__button {
    width: 46px;
    height: 46px;
  }
  .back-to-top__button span {
    font-size: 1.25rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .back-to-top,
  .back-to-top__button {
    transition: none;
  }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

.philosophy-source {
  display: block;
  margin-top: 0.35rem;
  color: var(--muted);
  font: 700 0.66rem/1.4 var(--mono);
  letter-spacing: 0.06em;
}
.channel-lead { margin: 0; }