/* =========================================================
   deltacontra — site styles
   やわらかい・親しみのあるトーン / 1ページ完結
   ========================================================= */

:root {
  --bg:        #fdfaf5;
  --bg-tint:   #f6f1e9;
  --surface:   #ffffff;
  --text:      #3e3a35;
  --text-mute: #7a736a;
  --accent:    #e08a6d;   /* やわらかいコーラル */
  --accent-dk: #c9714f;
  --teal:      #79a89d;   /* アクセント2 */
  --line:      #e9e1d5;
  --radius:    18px;
  --radius-lg: 28px;
  --shadow:    0 10px 30px rgba(112, 92, 70, .08);
  --maxw:      1040px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP",
               -apple-system, BlinkMacSystemFont, "Segoe UI", Meiryo, sans-serif;
  font-size: 16px;
  line-height: 1.9;
  letter-spacing: .02em;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; }

a { color: var(--accent-dk); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: 24px;
}
.container.narrow { max-width: 720px; }
.center { text-align: center; }

.skip-link {
  position: absolute;
  left: -9999px;
}
.skip-link:focus {
  left: 16px; top: 16px;
  z-index: 100;
  background: var(--surface);
  padding: 10px 16px;
  border-radius: 999px;
  box-shadow: var(--shadow);
}

/* ---------- header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(253, 250, 245, .86);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 68px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 700;
  letter-spacing: .04em;
}
.brand:hover { text-decoration: none; }

.brand-mark {
  display: grid;
  place-items: center;
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 17px;
  line-height: 1;
  padding-bottom: 2px;
}

.brand-name { font-size: 18px; }

.site-nav ul {
  display: flex;
  align-items: center;
  gap: 22px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.site-nav a {
  color: var(--text-mute);
  font-size: 14px;
  font-weight: 600;
}
.site-nav a:hover { color: var(--text); text-decoration: none; }

.nav-cta {
  background: var(--accent);
  color: #fff !important;
  padding: 8px 16px;
  border-radius: 999px;
}
.nav-cta:hover { background: var(--accent-dk); }

/* ---------- hero ---------- */

.hero {
  position: relative;
  overflow: hidden;
  padding: 96px 0 104px;
}

.hero-inner { position: relative; z-index: 2; max-width: 760px; }

.hero-eyebrow {
  margin: 0 0 18px;
  color: var(--teal);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
}

.hero-title {
  margin: 0 0 26px;
  font-size: clamp(30px, 6vw, 52px);
  line-height: 1.45;
  font-weight: 800;
  letter-spacing: .01em;
}

.marker {
  background: linear-gradient(transparent 62%, rgba(224, 138, 109, .32) 62%);
  padding-inline: 2px;
}

.hero-lead {
  margin: 0 0 34px;
  color: var(--text-mute);
  font-size: 16px;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }

.hero-blob {
  position: absolute;
  top: -140px; right: -160px;
  width: 520px; height: 520px;
  border-radius: 46% 54% 58% 42% / 52% 44% 56% 48%;
  background: radial-gradient(circle at 35% 35%, #fadfd2 0%, #f4e6d6 55%, #eef1e6 100%);
  opacity: .85;
  z-index: 1;
}

/* ---------- buttons ---------- */

.btn {
  display: inline-block;
  padding: 13px 28px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 700;
  transition: transform .15s ease, background-color .15s ease, box-shadow .15s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); }

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 8px 20px rgba(224, 138, 109, .28);
}
.btn-primary:hover { background: var(--accent-dk); }

.btn-ghost {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--line);
}

.btn-lg { padding: 16px 36px; font-size: 17px; }

/* ---------- sections ---------- */

.section { padding: 88px 0; }
.section-tint { background: var(--bg-tint); }

.section-label {
  margin: 0 0 6px;
  color: var(--teal);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
}

.section-title {
  margin: 0 0 20px;
  font-size: clamp(23px, 3.6vw, 30px);
  font-weight: 800;
  letter-spacing: .02em;
}

.section-desc {
  margin: 0 0 36px;
  max-width: 640px;
  color: var(--text-mute);
}
.center .section-desc { margin-inline: auto; }

.note {
  margin-top: 18px;
  color: var(--text-mute);
  font-size: 13px;
}

/* ---------- about ---------- */

.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 40px;
  align-items: start;
}

.about-lead p { margin: 0 0 20px; }
.about-lead p:last-child { margin-bottom: 0; }

.about-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow);
}
.about-card h3 {
  margin: 0 0 12px;
  font-size: 16px;
  font-weight: 800;
}
.about-card p { margin: 0; font-size: 15px; color: var(--text-mute); }
.about-card b { color: var(--text); }

/* ---------- product cards ---------- */

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.card {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px 26px 26px;
  box-shadow: var(--shadow);
  transition: transform .18s ease, box-shadow .18s ease;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 36px rgba(112, 92, 70, .12);
}

.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.card-icon {
  display: grid;
  place-items: center;
  width: 44px; height: 44px;
  border-radius: 14px;
  background: #fbeee6;
  color: var(--accent-dk);
  font-size: 20px;
}

.badge {
  background: #eef3f0;
  color: #5c8378;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .08em;
  padding: 5px 12px;
  border-radius: 999px;
}

.card-title {
  margin: 0 0 6px;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: .04em;
}

.card-tagline {
  margin: 0 0 14px;
  color: var(--accent-dk);
  font-size: 14px;
  font-weight: 700;
}

.card-body {
  margin: 0 0 20px;
  font-size: 14.5px;
  color: var(--text-mute);
}

.card-meta {
  margin: auto 0 0;
  padding: 16px 0 0;
  border-top: 1px dashed var(--line);
  list-style: none;
  font-size: 12.5px;
  color: var(--text-mute);
}
.card-meta li + li { margin-top: 2px; }

/* ---------- values ---------- */

.values {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.value-num {
  display: block;
  margin-bottom: 10px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .14em;
}
.value h3 { margin: 0 0 10px; font-size: 17px; font-weight: 800; }
.value p { margin: 0; font-size: 14.5px; color: var(--text-mute); }

/* ---------- company ---------- */

.company-table {
  margin: 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.company-table .row {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 16px;
  padding: 16px 24px;
  border-bottom: 1px solid var(--line);
}
.company-table .row:last-child { border-bottom: none; }
.company-table dt { color: var(--text-mute); font-size: 14px; font-weight: 700; }
.company-table dd { margin: 0; font-size: 15px; }

/* ---------- contact ---------- */

.contact { padding-bottom: 104px; }

/* ---------- footer ---------- */

.site-footer {
  background: #f1ebe1;
  border-top: 1px solid var(--line);
  padding: 40px 0;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
}

.footer-nav { display: flex; flex-wrap: wrap; gap: 18px; }
.footer-nav a { color: var(--text-mute); font-size: 13px; font-weight: 600; }
.footer-nav a:hover { color: var(--text); text-decoration: none; }

.copyright { margin: 0; color: var(--text-mute); font-size: 12px; }

/* ---------- responsive ---------- */

@media (max-width: 860px) {
  .about-grid { grid-template-columns: 1fr; }
  .cards, .values { grid-template-columns: 1fr; }
  .site-nav ul { gap: 14px; }
  .site-nav li:not(:last-child) { display: none; }
}

@media (max-width: 600px) {
  body { font-size: 15px; }
  .hero { padding: 64px 0 72px; }
  .hero-blob { width: 340px; height: 340px; top: -110px; right: -120px; }
  .section { padding: 64px 0; }
  .company-table .row { grid-template-columns: 1fr; gap: 4px; padding: 14px 18px; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn:hover, .card:hover { transform: none; }
}