/* =================================================================
   絹井工務店 Design System v1.0
   ================================================================= */

:root {
  --surface-base:     #fbfaf6;
  --surface-alt:      #f1ede4;
  --surface-elevated: #ffffff;
  --surface-dark:     #1a2332;
  --text-primary:     #1a2332;
  --text-secondary:   #4a5566;
  --text-muted:       #8a9099;
  --text-inverse:     #fbfaf6;
  --accent-primary:   #b85c2e;
  --accent-gold:      #c8a96b;
  --wood-warm:        #8b6f47;
  --border-subtle:    #d8d2c4;
  --border-strong:    #1a2332;
  --feedback-success: #5a7d4a;
  --feedback-error:   #a83236;
  --focus-ring:       #b85c2e;

  --font-heading: 'Zen Old Mincho', 'Noto Serif JP', serif;
  --font-serif:   'Noto Serif JP', serif;
  --font-sans:    'Noto Sans JP', sans-serif;
  --font-en:      'Cormorant Garamond', serif;
  --font-mono:    'JetBrains Mono', ui-monospace, monospace;

  --space-1: 4px; --space-2: 8px; --space-3: 12px; --space-4: 16px;
  --space-5: 24px; --space-6: 32px; --space-7: 48px; --space-8: 64px;
  --space-9: 96px; --space-10: 128px; --space-11: 160px;

  --radius-none: 0;
  --radius-subtle: 4px;
  --radius-md: 8px;
  --radius-full: 9999px;

  --shadow-subtle: 0 1px 2px rgba(26,35,50,0.06);
  --shadow-soft:   0 4px 16px rgba(26,35,50,0.10);
  --shadow-strong: 0 12px 32px rgba(26,35,50,0.16);

  --motion-fast:   240ms;
  --motion-normal: 400ms;
  --easing:        cubic-bezier(0.4, 0, 0.2, 1);

  --container-base: 1200px;
  --container-wide: 1440px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 17px;        /* 40-70代向けやや大 */
  line-height: 1.85;
  color: var(--text-primary);
  background: var(--surface-base);
  -webkit-font-smoothing: antialiased;
}
@media (max-width: 768px) {
  body { padding-bottom: 64px; }
}

a { color: inherit; text-decoration: none; }
img, picture, svg { display: block; max-width: 100%; height: auto; }
button { font: inherit; cursor: pointer; background: none; border: 0; padding: 0; color: inherit; }

.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute; top: -40px; left: var(--space-4);
  padding: var(--space-2) var(--space-4);
  background: #000; color: #fff; z-index: 1000;
  border-radius: var(--radius-subtle);
  transition: top var(--motion-fast) var(--easing);
}
.skip-link:focus { top: var(--space-4); }

.container { width: min(94%, var(--container-base)); margin-inline: auto; }
.container--wide { max-width: var(--container-wide); }

:focus { outline: none; }
:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

/* ── Header ──────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(251,250,246,0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-subtle);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) clamp(var(--space-4), 4vw, var(--space-7));
  gap: var(--space-5);
  max-width: var(--container-wide);
  margin: 0 auto;
}
.brand {
  display: inline-flex;
  flex-direction: column;
  line-height: 1.2;
  gap: 2px;
}
.brand__mark {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: 0.06em;
  color: var(--text-primary);
}
.brand__sub {
  font-family: var(--font-en);
  font-style: italic;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--text-secondary);
}

.gnav {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}
.gnav ul {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--space-5);
  font-size: 15px;
  font-weight: 500;
}
.gnav a { color: var(--text-primary); transition: color var(--motion-fast) var(--easing); }
.gnav a:hover { color: var(--accent-primary); }

.cta-quote {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  background: var(--accent-primary);
  color: var(--text-inverse);
  font-weight: 600;
  font-size: 15px;
  border-radius: var(--radius-subtle);
  min-height: 44px;
  transition: all var(--motion-fast) var(--easing);
}
.cta-quote:hover { background: #9a4a22; transform: translateY(-1px); box-shadow: var(--shadow-soft); }
.cta-quote::before {
  content: '＞';
  font-size: 11px;
}

@media (max-width: 1024px) {
  .gnav ul { display: none; }
}

/* ── Hero ────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 80vh;
  background:
    linear-gradient(135deg, rgba(26,35,50,0.85), rgba(26,35,50,0.4)),
    url('../assets/hero.jpg?v=2') center / cover no-repeat;
  color: var(--text-inverse);
  display: flex;
  align-items: center;
  padding: var(--space-9) 0;
}
.hero__inner {
  max-width: 720px;
  padding-inline: clamp(var(--space-5), 5vw, var(--space-8));
}
.hero__location {
  font-family: var(--font-en);
  font-style: italic;
  font-size: 14px;
  letter-spacing: 0.3em;
  color: var(--accent-gold);
  margin: 0 0 var(--space-5);
  text-transform: uppercase;
}
.hero__title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(1.5rem, 3.4vw, 2.4rem);
  line-height: 1.5;
  letter-spacing: 0.04em;
  margin: 0 0 var(--space-5);
  word-break: keep-all;
  overflow-wrap: anywhere;
}
.hero__title em { color: var(--accent-gold); font-style: normal; }
.hero__inner { max-width: 820px; }

.hero__lead {
  font-size: clamp(1rem, 1.5vw, 1.2rem);
  line-height: 1.85;
  margin: 0 0 var(--space-7);
  opacity: 0.95;
}

.hero__ctas {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 56px;
  padding: var(--space-4) var(--space-6);
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  border-radius: var(--radius-subtle);
  transition: all var(--motion-fast) var(--easing);
  white-space: nowrap;
  cursor: pointer;
}
.btn--primary {
  background: var(--accent-primary);
  color: var(--text-inverse);
  border: 1px solid var(--accent-primary);
}
.btn--primary:hover { background: #9a4a22; box-shadow: var(--shadow-soft); }
.btn--secondary {
  background: transparent;
  color: var(--text-inverse);
  border: 1px solid rgba(255,255,255,0.6);
}
.btn--secondary:hover { background: rgba(255,255,255,0.12); }
.btn:active { transform: translateY(1px); }
.btn:focus-visible { outline: 2px solid var(--focus-ring); outline-offset: 2px; }

/* ── Stats（実績バー） ──────────────────────────── */
.stats {
  background: var(--surface-elevated);
  border-bottom: 1px solid var(--border-subtle);
  padding: var(--space-7) 0;
}
.stats__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
  text-align: center;
}
@media (max-width: 768px) {
  .stats__grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-6) var(--space-4); }
}
.stat__num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(2rem, 4vw, 2.8rem);
  color: var(--accent-primary);
  line-height: 1;
  letter-spacing: -0.02em;
  display: block;
  margin-bottom: var(--space-2);
}
.stat__num small {
  font-size: 0.6em;
  font-weight: 500;
  margin-left: 4px;
  color: var(--text-secondary);
}
.stat__label {
  font-size: 14px;
  color: var(--text-secondary);
  letter-spacing: 0.08em;
}
.stats__note {
  text-align: center;
  font-size: 12px;
  color: var(--text-muted);
  margin: var(--space-5) 0 0;
  letter-spacing: 0.06em;
}

/* ── Section base ───────────────────────────────── */
.section { padding: clamp(var(--space-9), 12vh, var(--space-11)) 0; }
.section--alt { background: var(--surface-alt); }
.section--dark { background: var(--surface-dark); color: var(--text-inverse); }

.section-eyebrow {
  font-family: var(--font-en);
  font-style: italic;
  font-size: 14px;
  letter-spacing: 0.3em;
  color: var(--accent-primary);
  margin: 0 0 var(--space-2);
  text-transform: uppercase;
}
.section--dark .section-eyebrow { color: var(--accent-gold); }

.section-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(1.8rem, 3.4vw, 2.4rem);
  letter-spacing: 0.04em;
  margin: 0 0 var(--space-4);
  line-height: 1.4;
}
.section-title--center { text-align: center; }
.section-lead {
  color: var(--text-secondary);
  font-size: 16px;
  margin: 0 0 var(--space-7);
  max-width: 720px;
}
.section-title--center + .section-lead { margin: 0 auto var(--space-7); text-align: center; }

/* ── Service cards ──────────────────────────────── */
.services__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-4);
}
.service {
  background: var(--surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  text-align: left;
  transition: all var(--motion-fast) var(--easing);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.service:hover {
  box-shadow: var(--shadow-soft);
  transform: translateY(-2px);
  border-color: var(--accent-primary);
}
.service__icon {
  width: 48px; height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-alt);
  border-radius: var(--radius-md);
  color: var(--accent-primary);
  font-size: 24px;
}
.service h3 {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 18px;
  margin: 0;
  letter-spacing: 0.04em;
  line-height: 1.5;
  min-height: 3em; /* 2行ぶん固定 */
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.service p {
  margin: 0;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.service__link {
  margin-top: auto;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent-primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.service__link::after { content: '→'; transition: transform var(--motion-fast); }
.service:hover .service__link::after { transform: translateX(4px); }

/* ── Cases (Before/After) ───────────────────────── */
.cases__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-5);
}
.case {
  background: var(--surface-elevated);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-subtle);
  transition: all var(--motion-fast) var(--easing);
  display: flex;
  flex-direction: column;
}
.case:hover { box-shadow: var(--shadow-soft); transform: translateY(-2px); }
.case__images {
  display: grid;
  grid-template-columns: 1fr 1fr;
  position: relative;
  flex-shrink: 0;
}
.case__image {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
}
.case__image img { width: 100%; height: 100%; object-fit: cover; }
.case__image::before {
  content: attr(data-label);
  position: absolute;
  top: var(--space-3); left: var(--space-3);
  padding: 4px 10px;
  background: var(--surface-dark);
  color: var(--text-inverse);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  border-radius: var(--radius-subtle);
  z-index: 2;
}
.case__image--after::before { background: var(--accent-primary); }
.case__body {
  padding: var(--space-5);
  flex: 1;
  display: flex;
  flex-direction: column;
}
.case__tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--accent-primary);
  margin-bottom: var(--space-2);
}
.case__title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 18px;
  margin: 0 0 var(--space-4);
  line-height: 1.5;
  min-height: 3em; /* 2行ぶん固定で高さ揃え */
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.case__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  font-size: 13px;
  color: var(--text-secondary);
  border-top: 1px solid var(--border-subtle);
  padding-top: var(--space-3);
  margin-top: auto; /* メタ情報を下端に固定 */
}
.case__meta dt { font-weight: 600; }
.case__meta dd { margin: 0; }

/* ── Flow（施工の流れ） ──────────────────────────── */
.flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-4);
  counter-reset: flow;
}
.flow__step {
  background: var(--surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  transition: all var(--motion-fast) var(--easing);
}
.flow__step:hover {
  box-shadow: var(--shadow-soft);
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}
.flow__num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 22px;
  color: var(--accent-primary);
  letter-spacing: 0.05em;
  line-height: 1;
}
.flow__title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 17px;
  margin: 0;
  letter-spacing: 0.04em;
}
.flow__body {
  margin: 0;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ── Pricing ─────────────────────────────────────── */
.pricing__compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
  margin-bottom: var(--space-8);
}
@media (max-width: 720px) {
  .pricing__compare { grid-template-columns: 1fr; }
}
.pricing__col {
  background: var(--surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-5);
}
.pricing__col--highlight {
  border-color: var(--accent-primary);
  border-width: 2px;
  background: linear-gradient(180deg, var(--surface-elevated), #fff7f0);
}
.pricing__label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.1em;
  margin: 0 0 var(--space-4);
  text-transform: uppercase;
}
.pricing__col--highlight .pricing__label {
  color: var(--accent-primary);
}
.pricing__chain {
  list-style: none;
  margin: 0 0 var(--space-4);
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.pricing__chain li {
  padding: var(--space-3) var(--space-4);
  background: var(--surface-base);
  border-radius: var(--radius-subtle);
  font-size: 14px;
  position: relative;
}
.pricing__chain li:not(:last-child)::after {
  content: '↓';
  position: absolute;
  left: 50%;
  bottom: -16px;
  transform: translateX(-50%);
  color: var(--text-muted);
  font-size: 12px;
}
.pricing__col--highlight .pricing__chain li {
  background: #fff;
  border: 1px solid var(--accent-primary);
}
.pricing__col--highlight .pricing__chain li:nth-child(2) {
  font-weight: 700;
  color: var(--accent-primary);
}
.pricing__note {
  font-size: 13px;
  color: var(--text-secondary);
  margin: 0;
  text-align: center;
}
.pricing__note--accent {
  color: var(--accent-primary);
  font-weight: 600;
}

.pricing__rates {
  background: var(--surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-7);
  max-width: 880px;
  margin-inline: auto;
}
.pricing__rates h3 {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 18px;
  margin: 0 0 var(--space-4);
  letter-spacing: 0.04em;
  text-align: center;
}
.pricing__rates dl {
  margin: 0 0 var(--space-4);
  border-top: 1px solid var(--border-subtle);
}
.pricing__rates dl > div {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--border-subtle);
  gap: var(--space-4);
}
.pricing__rates dt {
  font-size: 15px;
  color: var(--text-primary);
}
.pricing__rates dd {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 16px;
  color: var(--accent-primary);
  white-space: nowrap;
}
.pricing__disclaimer {
  font-size: 12px;
  color: var(--text-muted);
  margin: 0;
  text-align: center;
}

/* ── Footer SNS Icons ───────────────────────────── */
.site-footer__sns {
  display: flex !important;
  gap: var(--space-3);
  margin-top: var(--space-4) !important;
  padding: 0;
}
.site-footer__sns li { line-height: 0; }
.site-footer__sns a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: var(--radius-full);
  color: rgba(251,250,246,0.85);
  transition: all var(--motion-fast) var(--easing);
}
.site-footer__sns a:hover {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: #fff;
  transform: translateY(-2px);
}

/* ── Voices ─────────────────────────────────────── */
.voices__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-5);
}
.voice {
  background: var(--surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-6);
}
.voice__rating {
  color: var(--accent-gold);
  font-size: 18px;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-3);
}
.voice__body {
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-primary);
  margin: 0 0 var(--space-4);
}
.voice__author {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  border-top: 1px solid var(--border-subtle);
  padding-top: var(--space-3);
}
.voice__avatar {
  width: 44px; height: 44px;
  border-radius: var(--radius-full);
  background: var(--wood-warm);
  color: var(--text-inverse);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 16px;
  font-family: var(--font-heading);
}
.voice__name {
  font-weight: 600;
  font-size: 14px;
  margin: 0;
}
.voice__meta {
  font-size: 12px;
  color: var(--text-secondary);
  margin: 2px 0 0;
}

/* ── Video section ──────────────────────────────── */
.video-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-7);
  align-items: center;
}
@media (max-width: 768px) {
  .video-block { grid-template-columns: 1fr; }
}
.video-block__frame {
  aspect-ratio: 16/9;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-strong);
  background: #000;
}
.video-block__frame iframe { width: 100%; height: 100%; border: 0; }

/* ── CTA Banner ─────────────────────────────────── */
.cta-banner {
  background: var(--surface-dark);
  color: var(--text-inverse);
  padding: var(--space-9) 0;
  text-align: center;
}
.cta-banner h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin: 0 0 var(--space-4);
  letter-spacing: 0.04em;
}
.cta-banner p { font-size: 16px; opacity: 0.9; margin: 0 0 var(--space-6); }
.cta-banner__buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: center;
}

/* ── Company section ────────────────────────────── */
.company {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: var(--space-8);
  align-items: start;
}
@media (max-width: 768px) {
  .company { grid-template-columns: 1fr; }
}
.company__photo {
  aspect-ratio: 4/5;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  position: relative;
}
.company__photo img { width: 100%; height: 100%; object-fit: cover; }

.company__photo--placeholder img {
  filter: grayscale(0.3) brightness(0.95);
}
.company__photo-badge {
  position: absolute;
  top: var(--space-3);
  left: var(--space-3);
  background: rgba(184, 92, 46, 0.95);
  color: #fff;
  padding: 6px 12px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  border-radius: var(--radius-subtle);
  z-index: 2;
}
.company__photo-note {
  position: absolute;
  inset: auto 0 0 0;
  margin: 0;
  padding: var(--space-3) var(--space-4);
  background: rgba(26, 35, 50, 0.85);
  backdrop-filter: blur(4px);
  color: #fff;
  font-size: 12px;
  letter-spacing: 0.06em;
  text-align: center;
  z-index: 2;
}

.company__info dl {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 0;
  border-top: 1px solid var(--border-subtle);
  margin: var(--space-6) 0 0;
}
.company__info dt, .company__info dd {
  margin: 0;
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 15px;
}
.company__info dt {
  font-weight: 600;
  color: var(--text-secondary);
}
@media (max-width: 600px) {
  .company__info dl { grid-template-columns: 1fr; }
  .company__info dt { padding-bottom: 0; border-bottom: 0; }
  .company__info dd { padding-top: 4px; }
}

/* ── Footer ─────────────────────────────────────── */
.site-footer {
  background: var(--surface-dark);
  color: rgba(251,250,246,0.85);
  padding: var(--space-9) 0 var(--space-5);
}
.site-footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--space-6);
  padding-bottom: var(--space-7);
  border-bottom: 1px solid rgba(255,255,255,0.12);
}
@media (max-width: 768px) {
  .site-footer__grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .site-footer__grid { grid-template-columns: 1fr; }
}
.site-footer h4 {
  font-family: var(--font-heading);
  color: #fff;
  font-size: 15px;
  margin: 0 0 var(--space-3);
  letter-spacing: 0.06em;
}
.site-footer ul { list-style: none; padding: 0; margin: 0; font-size: 14px; line-height: 2; }
.site-footer__addr { font-size: 14px; line-height: 1.85; }
.site-footer__cert {
  font-size: 12px;
  color: rgba(251,250,246,0.65);
  margin-top: var(--space-2);
  font-family: var(--font-mono);
}
.site-footer__copy {
  text-align: center;
  margin: var(--space-5) 0 0;
  font-family: var(--font-en);
  letter-spacing: 0.18em;
  font-size: 12px;
  color: rgba(251,250,246,0.5);
}

/* ── SP固定下部ナビ ─────────────────────────── */
.sp-nav {
  display: none;
  position: fixed;
  inset: auto 0 0 0;
  z-index: 100;
  background: rgba(26,35,50,0.97);
  backdrop-filter: blur(8px);
  border-top: 1px solid rgba(255,255,255,0.08);
}
.sp-nav a {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  padding: var(--space-2) 0;
  min-height: 64px;
  font-size: 11px;
  color: var(--text-inverse);
  border-right: 1px solid rgba(255,255,255,0.08);
  letter-spacing: 0.08em;
}
.sp-nav a:last-child { border-right: 0; }
.sp-nav a:active { background: rgba(255,255,255,0.08); }
.sp-nav__icon {
  font-size: 20px;
  line-height: 1;
}
.sp-nav a.cta { background: var(--accent-primary); }

@media (max-width: 768px) {
  .sp-nav { display: flex; }
}