:root {
  --paper: #EDE7DA;
  --paper-deep: #E3DDD0;
  --ink: #1A1F1C;
  --muted: rgba(26, 31, 28, 0.62);
  --green: #1E4A3E;
  --green-deep: #112D25;
  --green-mid: #3D6B5F;
  --gold: #B8952E;
  --line: rgba(26, 31, 28, 0.1);
  --white: #FDFAF4;
  --panel: #112D25;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(90deg, rgba(26, 31, 28, 0.04) 1px, transparent 1px),
    linear-gradient(180deg, rgba(26, 31, 28, 0.028) 1px, transparent 1px),
    var(--paper);
  background-size: 80px 80px;
  font-family: "Noto Sans CJK JP", "Noto Sans JP", "Hiragino Kaku Gothic ProN",
    "Yu Gothic", "YuGothic", Meiryo, sans-serif;
  font-feature-settings: "palt";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  line-height: 1.82;
}

a { color: inherit; }

/* ── Header ─────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px clamp(20px, 5vw, 66px);
  background: rgba(237, 231, 218, 0.9);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(20px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand img {
  height: 48px;
  width: auto;
}

.brand-mark {
  width: 34px;
  height: 34px;
  display: inline-block;
  border: 2px solid var(--green);
  border-radius: 6px;
  background:
    linear-gradient(90deg, transparent 47%, var(--green) 47%, var(--green) 53%, transparent 53%),
    linear-gradient(0deg, transparent 47%, var(--green) 47%, var(--green) 53%, transparent 53%),
    var(--white);
}

.brand-name {
  display: block;
  font-size: 1.05rem;
  font-weight: 760;
  line-height: 1.08;
}

.brand-kana {
  display: block;
  color: var(--green-mid);
  font-size: 0.72rem;
  line-height: 1.2;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 24px;
  color: var(--muted);
  font-size: 0.84rem;
  letter-spacing: 0.01em;
}

.nav a { text-decoration: none; }
.nav a:hover,
.nav a:focus-visible { color: var(--green); }

/* ── Section base ────────────────────────────── */
.section {
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
  padding: 72px 0;
}

/* ── Hero ────────────────────────────────────── */
.hero {
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(460px, 1.08fr);
  align-items: center;
  gap: clamp(32px, 5vw, 68px);
  padding-top: 64px;
  padding-bottom: 52px;
}

/* Signature: 「見」— tied to みはるば etymology (見はる場) */
.hero::before {
  content: "見";
  position: absolute;
  left: -0.06em;
  top: -0.16em;
  font-size: 38vw;
  font-family: "Noto Serif CJK JP", "Noto Serif JP", "Yu Mincho", serif;
  font-weight: 700;
  color: var(--green);
  opacity: 0.038;
  line-height: 1;
  pointer-events: none;
  user-select: none;
  z-index: 0;
}

.hero > * {
  position: relative;
  z-index: 1;
}

/* ── Typography ──────────────────────────────── */
.eyebrow,
.section-label {
  margin: 0 0 16px;
  color: var(--green-mid);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2 {
  font-family: "Noto Serif CJK JP", "Noto Serif JP", "Yu Mincho", "YuMincho",
    "Hiragino Mincho ProN", serif;
  overflow-wrap: anywhere;
}

h3,
p { overflow-wrap: anywhere; }

h1 {
  max-width: 12em;
  margin: 0;
  font-size: 4.6rem;
  font-weight: 660;
  line-height: 1.1;
  letter-spacing: -0.01em;
}

h2 {
  margin: 0;
  font-size: 2.4rem;
  font-weight: 640;
  line-height: 1.24;
  letter-spacing: -0.01em;
}

h3 {
  margin: 0 0 10px;
  font-size: 1.02rem;
  font-weight: 680;
  line-height: 1.5;
}

.lead {
  max-width: 620px;
  margin: 22px 0 0;
  color: rgba(26, 31, 28, 0.82);
  font-size: 1.06rem;
  line-height: 1.84;
}

/* ── Buttons ─────────────────────────────────── */
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  border: 1.5px solid var(--green);
  border-radius: 4px;
  text-decoration: none;
  font-size: 0.94rem;
  font-weight: 740;
  line-height: 1.3;
  transition: transform 180ms ease, background 180ms ease, color 180ms ease;
}

.button:hover,
.button:focus-visible { transform: translateY(-1px); }

.button.primary { color: var(--white); background: var(--green); }
.button.primary:hover,
.button.primary:focus-visible { background: var(--green-deep); }
.button.secondary { color: var(--green); background: rgba(255, 253, 247, 0.52); }

.note {
  max-width: 580px;
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 0.88rem;
}

/* ── Hero visual (canvas) ────────────────────── */
.hero-visual { position: relative; }

.signal-panel {
  position: relative;
  min-height: 360px;
  overflow: hidden;
  border: 1px solid rgba(255, 253, 247, 0.12);
  border-radius: 8px;
  background:
    linear-gradient(180deg, rgba(255, 253, 247, 0.06), transparent 40%),
    var(--panel);
  box-shadow: 0 32px 90px rgba(26, 31, 28, 0.2);
}

#signal-map {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.signal-copy {
  position: absolute;
  left: 24px;
  right: 24px;
  bottom: 24px;
  color: var(--white);
}

.signal-copy p {
  margin: 0 0 8px;
  color: rgba(247, 244, 237, 0.5);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.signal-copy strong {
  max-width: 18em;
  display: block;
  font-family: "Noto Serif CJK JP", "Noto Serif JP", serif;
  font-size: 1.4rem;
  font-weight: 520;
  line-height: 1.54;
}

.signal-legend {
  position: absolute;
  top: 18px;
  left: 18px;
  right: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.signal-legend span {
  padding: 4px 9px;
  border: 1px solid rgba(247, 244, 237, 0.13);
  border-radius: 2px;
  color: rgba(247, 244, 237, 0.65);
  background: rgba(247, 244, 237, 0.05);
  font-size: 0.73rem;
}

.flow-line {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: 1px;
  background: rgba(26, 31, 28, 0.14);
}

.flow-item {
  min-height: 96px;
  padding: 14px 16px 13px;
  background: rgba(255, 253, 247, 0.72);
}

.flow-item span,
.flow-item strong,
.flow-item small { display: block; }

.flow-item span {
  color: var(--green);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.flow-item strong {
  margin-top: 8px;
  font-size: 1.1rem;
}

.flow-item small {
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.8rem;
}

/* ── 2-col split sections ────────────────────── */
.intro,
.difference,
.split,
.contact,
.boundaries {
  display: grid;
  grid-template-columns: minmax(240px, 0.52fr) minmax(0, 1fr);
  gap: clamp(28px, 5vw, 64px);
  border-top: 1px solid var(--line);
}

.intro p:last-child,
.split > div > p,
.contact p,
.boundaries > div > p {
  margin: 0;
  font-size: 1.04rem;
}

/* ── Difference ──────────────────────────────── */
.difference-body { display: grid; gap: 24px; }

.difference-lead {
  margin: 0;
  font-size: 1.04rem;
}

.difference-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.difference-grid article {
  min-height: 168px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: rgba(255, 253, 247, 0.55);
}

.difference-grid p { margin: 0; color: var(--muted); }

.difference-note {
  margin: 0;
  padding-left: 18px;
  border-left: 3px solid var(--gold);
  color: var(--muted);
  font-weight: 680;
}

/* ── Section heading ─────────────────────────── */
.section-heading { margin-bottom: 28px; }

.section-heading p:not(.section-label) {
  max-width: 720px;
  margin: 12px 0 0;
  color: var(--muted);
}

/* ── Value list (numbered) ───────────────────── */
.value-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.value-list li {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 24px;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}

.value-list li:first-child { border-top: 1px solid var(--line); }

.value-num {
  font-family: "Noto Serif CJK JP", "Noto Serif JP", serif;
  font-size: 2.1rem;
  font-weight: 620;
  color: var(--green-mid);
  opacity: 0.6;
  line-height: 1.1;
  padding-top: 2px;
}

.value-list h3 { margin-bottom: 8px; }
.value-list p { margin: 0; color: var(--muted); }

/* ── Service grid (card-based) ───────────────── */
.service-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.service-grid article {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: rgba(255, 253, 247, 0.65);
  transition: background 180ms ease, border-color 180ms ease;
}

.service-grid article:hover {
  background: rgba(255, 253, 247, 0.95);
  border-color: rgba(30, 74, 62, 0.22);
}

.service-grid p { margin: 0; color: var(--muted); }

/* ── Process steps ───────────────────────────── */
.steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.steps li {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  gap: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.steps span { color: var(--green-mid); font-weight: 800; }
.steps p { margin: 0; color: var(--muted); }

/* ── Pricing ─────────────────────────────────── */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.pricing-grid article {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: rgba(255, 253, 247, 0.65);
  transition: background 180ms ease;
}

.pricing-grid article:hover { background: rgba(255, 253, 247, 0.95); }

.pricing-grid p { margin: 0; color: var(--muted); }

.plan {
  margin: 0 0 12px !important;
  color: var(--green-mid) !important;
  font-size: 0.78rem;
  font-weight: 760;
  letter-spacing: 0.07em;
}

.pricing-grid h3 {
  margin-bottom: 10px;
  font-size: 1.28rem;
}

.pricing-grid .featured {
  background: rgba(30, 74, 62, 0.08);
  border-color: rgba(30, 74, 62, 0.2);
}

/* ── Boundaries ──────────────────────────────── */
.boundaries ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.boundaries li {
  padding: 12px 14px;
  border-left: 3px solid var(--gold);
  background: rgba(255, 253, 247, 0.55);
  font-size: 0.96rem;
}

/* ── Accordion (use cases + FAQ) ─────────────── */
.accordion { border-top: 1px solid var(--line); }

.accordion-item { border-bottom: 1px solid var(--line); }

.accordion-item summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 0;
  cursor: pointer;
  font-weight: 680;
  font-size: 1rem;
  line-height: 1.52;
}

.accordion-item summary::-webkit-details-marker { display: none; }
.accordion-item summary::marker { display: none; }

.accordion-icon {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  position: relative;
}

.accordion-icon::before,
.accordion-icon::after {
  content: '';
  position: absolute;
  background: var(--green);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  border-radius: 1px;
}

.accordion-icon::before { width: 14px; height: 1.5px; }
.accordion-icon::after { height: 14px; width: 1.5px; transition: transform 220ms ease; }

.accordion-item[open] .accordion-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.accordion-body {
  padding: 0 32px 22px 0;
  color: var(--muted);
  max-width: 820px;
  line-height: 1.84;
}

.accordion-body p { margin: 0; }

/* ── About ───────────────────────────────────── */
.about-body { display: grid; gap: 22px; }
.about-lead { margin: 0; font-size: 1.04rem; }

.about-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.about-list li {
  padding: 14px 18px;
  border-left: 3px solid var(--green);
  background: rgba(255, 253, 247, 0.55);
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.74;
}

.about-list strong {
  display: block;
  margin-bottom: 4px;
  color: var(--ink);
  font-size: 0.98rem;
}

/* ── Media ───────────────────────────────────── */
.media {
  display: grid;
  grid-template-columns: minmax(240px, 0.52fr) minmax(0, 1fr);
  gap: clamp(28px, 5vw, 64px);
  border-top: 1px solid var(--line);
}

.media-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  align-content: start;
}

.media-link {
  display: grid;
  grid-template-columns: 80px minmax(0, 1fr) auto;
  gap: 16px;
  align-items: center;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.media-platform {
  font-size: 0.82rem;
  font-weight: 680;
  letter-spacing: 0.04em;
  color: var(--green-mid);
  text-transform: uppercase;
}

.media-desc {
  font-size: 0.96rem;
  color: var(--text);
  opacity: 0.82;
}

.media-status {
  font-size: 0.82rem;
  color: var(--muted);
  white-space: nowrap;
}

.media-url {
  font-size: 0.88rem;
  color: var(--gold);
  text-decoration: none;
  white-space: nowrap;
}

.media-url:hover { text-decoration: underline; }

/* ── Contact ─────────────────────────────────── */
.contact { align-items: center; padding-bottom: 64px; }
.mail-button { width: fit-content; justify-self: end; }

/* ── Footer ──────────────────────────────────── */
.site-footer {
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
  padding: 32px 0 48px;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.site-footer p { margin: 0; }

/* ── Scroll reveal ───────────────────────────── */
.fade-in {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 520ms ease, transform 520ms ease;
}

.fade-in.visible {
  opacity: 1;
  transform: none;
}

/* ── Reduced motion ──────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero::before { display: none; }
  .button, .service-grid article, .pricing-grid article { transition: none; }
  .accordion-icon::after { transition: none; }
  .fade-in { opacity: 1; transform: none; transition: none; }
}

/* ── Tablet (≤ 920px) ────────────────────────── */
@media (max-width: 920px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
  }

  .nav { justify-content: flex-start; }

  .hero,
  .intro,
  .difference,
  .split,
  .contact,
  .boundaries,
  .media {
    grid-template-columns: 1fr;
  }

  .signal-panel { min-height: 330px; }

  .service-grid,
  .difference-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .pricing-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .value-list li {
    grid-template-columns: 56px minmax(0, 1fr);
    gap: 16px;
  }

  .value-num { font-size: 1.8rem; }

  .mail-button { justify-self: start; }
}

/* ── Mobile (≤ 620px) ────────────────────────── */
@media (max-width: 620px) {
  .section {
    width: min(calc(100% - 28px), 1180px);
    padding: 48px 0;
  }

  .site-header { padding: 16px 14px; }
  .nav { gap: 12px; font-size: 0.84rem; }

  .hero { padding-top: 44px; padding-bottom: 38px; }

  h1 { font-size: 2.8rem; }
  h2 { font-size: 1.9rem; }

  .hero-actions,
  .button { width: 100%; }

  .signal-panel { min-height: 300px; }
  .signal-copy { left: 20px; right: 20px; bottom: 20px; }
  .signal-copy strong { font-size: 1.12rem; }

  .flow-line,
  .service-grid,
  .pricing-grid,
  .difference-grid { grid-template-columns: 1fr; }

  .flow-item { min-height: auto; }
  .steps li { grid-template-columns: 44px minmax(0, 1fr); }

  .value-list li {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 12px;
  }

  .value-num { font-size: 1.5rem; }

  .accordion-body { padding-right: 0; }

  .media-link {
    grid-template-columns: 72px minmax(0, 1fr);
    grid-template-rows: auto auto;
    gap: 6px 12px;
  }

  .media-status,
  .media-url {
    grid-column: 2;
  }
}