/* ==========================================================
   株式会社Aiwa — Design Tokens
   Palette: 淡いセージグリーン × 温かいアイボリー × ピーチ/パウダーブルーの差し色
   Type: Zen Old Mincho（見出し） / Zen Kaku Gothic New（本文）
   Signature: 重なり合う円 = 人と人・企業と企業の「和」をつなぐモチーフ
   ========================================================== */

:root {
  --color-bg: #fbf6f3;
  --color-bg-soft: #f7ece7;
  --color-ink: #3d2e2c;
  --color-ink-soft: #7d6a64;
  --color-primary: #c48b94;
  --color-primary-dark: #a1616d;
  --color-primary-pale: #f3dee1;
  --color-accent: #d8b98c;
  --color-accent-dark: #b3925e;
  --color-accent2: #e4d9d3;
  --color-accent2-dark: #8f7a74;
  --color-line: #ecdcd6;
  --color-white: #fffdfb;

  --font-display: "Zen Old Mincho", serif;
  --font-body: "Zen Kaku Gothic New", "Noto Sans JP", sans-serif;

  --radius-lg: 28px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --shadow-soft: 0 12px 32px rgba(161, 97, 109, 0.14);
  --container: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: inherit; text-decoration: none; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.5;
  margin: 0;
  letter-spacing: 0.02em;
}

p { margin: 0; }

.wrap {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(251, 248, 243, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-line);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 78px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-ink);
}

.logo-prefix {
  font-family: var(--font-display);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  color: var(--color-ink-soft);
  white-space: nowrap;
}

.logo-img {
  height: 30px;
  width: auto;
  display: block;
}

nav.main-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

nav.main-nav a {
  font-size: 0.92rem;
  padding: 10px 16px;
  border-radius: 999px;
  color: var(--color-ink-soft);
  transition: background 0.2s ease, color 0.2s ease;
  white-space: nowrap;
}

nav.main-nav a:hover,
nav.main-nav a.is-active {
  background: var(--color-primary-pale);
  color: var(--color-primary-dark);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-ink);
  margin: 5px 0;
  transition: 0.2s;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: 96px 0 88px;
}

.hero-rings {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.hero .wrap {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}

.hero-photo {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/3.1;
  box-shadow: var(--shadow-soft);
}
.hero-photo img {
  width: 100%; height: 100%;
  object-fit: cover;
}
.hero-photo::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(155deg, rgba(196,139,148,0.28) 0%, rgba(216,185,140,0.12) 55%, rgba(61,46,44,0.08) 100%);
}
.hero-photo-badge {
  position: absolute;
  left: 20px; bottom: 20px;
  background: rgba(255,253,251,0.92);
  backdrop-filter: blur(4px);
  padding: 12px 18px;
  border-radius: 999px;
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--color-primary-dark);
  box-shadow: var(--shadow-soft);
  z-index: 1;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: var(--color-primary-dark);
  background: var(--color-primary-pale);
  padding: 7px 16px;
  border-radius: 999px;
  margin-bottom: 28px;
}

.hero h1 {
  font-size: clamp(2.1rem, 4.4vw, 3.4rem);
  max-width: 15ch;
  color: var(--color-ink);
}

.hero h1 em {
  font-style: normal;
  color: var(--color-primary-dark);
}

.hero-sub {
  margin-top: 26px;
  font-size: 1.05rem;
  color: var(--color-ink-soft);
  max-width: 46ch;
}

.hero-actions {
  margin-top: 40px;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 15px 30px;
  border-radius: 999px;
  font-size: 0.95rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn-primary {
  background: var(--color-primary-dark);
  color: var(--color-white);
  box-shadow: var(--shadow-soft);
}
.btn-primary:hover { transform: translateY(-2px); background: var(--color-ink); }

.btn-ghost {
  background: transparent;
  color: var(--color-ink);
  border: 1px solid var(--color-line);
}
.btn-ghost:hover { border-color: var(--color-primary-dark); color: var(--color-primary-dark); }

/* ---------- Section generic ---------- */
section { padding: 88px 0; }

.section-head {
  max-width: 640px;
  margin: 0 0 52px;
}

.section-head .eyebrow { margin-bottom: 18px; }

.section-head h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
}

.section-head p {
  margin-top: 18px;
  color: var(--color-ink-soft);
}

.section-alt { background: var(--color-bg-soft); }

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

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.card {
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-soft); }
a.card { display: block; }

.card-link-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  font-size: 0.85rem;
  color: var(--color-primary-dark);
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
}

.card h3 { font-size: 1.18rem; margin-bottom: 12px; }
.card p { color: var(--color-ink-soft); font-size: 0.95rem; }

.tag-dot {
  display: inline-block;
  width: 7px; height: 7px;
  border-radius: 50%;
  margin-right: 8px;
}

/* ---------- Rings signature ---------- */
.ring-cluster { position: relative; width: 100%; height: 100%; }
.ring {
  position: absolute;
  border-radius: 50%;
  opacity: 0.55;
}

/* ---------- Stats strip ---------- */
.stats-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding: 44px 0;
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.stat-num {
  font-family: var(--font-display);
  font-size: 2.1rem;
  color: var(--color-primary-dark);
}

.stat-label {
  margin-top: 6px;
  font-size: 0.85rem;
  color: var(--color-ink-soft);
}

/* ---------- Flow / process ---------- */
.flow {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.flow-step {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 24px;
  padding: 28px 0;
  border-bottom: 1px solid var(--color-line);
}
.flow-step:last-child { border-bottom: none; }

.flow-num {
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--color-accent-dark);
}

.flow-step h4 { font-size: 1.08rem; margin-bottom: 8px; }
.flow-step p { color: var(--color-ink-soft); font-size: 0.94rem; }

/* ---------- CTA band ---------- */
.cta-band {
  background: var(--color-primary-dark);
  border-radius: var(--radius-lg);
  padding: 56px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  color: var(--color-white);
}

.cta-band h3 {
  font-size: 1.5rem;
  color: var(--color-white);
}

.cta-band p { color: rgba(255,255,255,0.82); margin-top: 10px; }

.cta-band .btn-primary {
  background: var(--color-white);
  color: var(--color-primary-dark);
}
.cta-band .btn-primary:hover { background: var(--color-accent); color: var(--color-ink); }

/* ---------- Footer ---------- */
footer.site-footer {
  background: var(--color-ink);
  color: rgba(255,255,255,0.72);
  padding: 56px 0 32px;
  margin-top: 40px;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
  padding-bottom: 36px;
  border-bottom: 1px solid rgba(255,255,255,0.14);
}

.footer-logo {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--color-white);
  margin-bottom: 12px;
}

.footer-logo-img {
  height: 26px;
  width: auto;
  margin-bottom: 16px;
}

.footer-cols {
  display: flex;
  gap: 64px;
  flex-wrap: wrap;
}

.footer-col h5 {
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  color: rgba(255,255,255,0.5);
  margin-bottom: 14px;
  font-weight: 500;
}

.footer-col a, .footer-col p {
  display: block;
  font-size: 0.9rem;
  margin-bottom: 10px;
  color: rgba(255,255,255,0.78);
}
.footer-col a:hover { color: var(--color-accent); }

.footer-bottom {
  padding-top: 26px;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.45);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- Page header (subpages) ---------- */
.page-header {
  padding: 70px 0 56px;
  position: relative;
  overflow: hidden;
}
.page-header .wrap { position: relative; z-index: 1; }
.page-header h1 { font-size: clamp(1.9rem, 3.6vw, 2.6rem); }
.page-header p { margin-top: 18px; color: var(--color-ink-soft); max-width: 50ch; }

/* ---------- Table-ish list ---------- */
.info-list {
  border-top: 1px solid var(--color-line);
}
.info-row {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 24px;
  padding: 22px 0;
  border-bottom: 1px solid var(--color-line);
}
.info-row dt {
  font-size: 0.88rem;
  color: var(--color-ink-soft);
  letter-spacing: 0.04em;
}
.info-row dd { margin: 0; font-size: 0.98rem; }

/* ---------- Values (about page) ---------- */
.value-item {
  display: flex;
  gap: 20px;
  padding: 26px 0;
  border-bottom: 1px solid var(--color-line);
}
.value-item:last-child { border-bottom: none; }
.value-num {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--color-primary);
  flex-shrink: 0;
  width: 48px;
}
.value-item h4 { font-size: 1.05rem; margin-bottom: 8px; }
.value-item p { color: var(--color-ink-soft); font-size: 0.94rem; }

/* ---------- Service detail blocks ---------- */
.service-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  padding: 64px 0;
  border-bottom: 1px solid var(--color-line);
}
.service-block:last-child { border-bottom: none; }
.service-block.reverse .service-visual { order: 2; }
.service-block.reverse .service-text { order: 1; }

.service-label {
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  color: var(--color-primary-dark);
  margin-bottom: 16px;
  display: block;
}

.service-text h3 { font-size: 1.5rem; margin-bottom: 18px; }
.service-text p { color: var(--color-ink-soft); }

.service-points {
  margin-top: 24px;
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.service-points li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.94rem;
  color: var(--color-ink);
}
.service-points li::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--color-accent-dark);
  margin-top: 9px;
  flex-shrink: 0;
}

.service-visual {
  aspect-ratio: 4/3;
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
}
.service-visual img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
}
.service-visual::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(160deg, rgba(196,139,148,0.30) 0%, rgba(216,185,140,0.10) 60%, rgba(61,46,44,0.05) 100%);
  pointer-events: none;
}

/* ---------- Contact form ---------- */
.form-wrap {
  max-width: 680px;
  margin: 0 auto;
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 44px;
}

.form-row { margin-bottom: 22px; }
.form-row label {
  display: block;
  font-size: 0.88rem;
  color: var(--color-ink-soft);
  margin-bottom: 8px;
}
.form-row input,
.form-row textarea,
.form-row select {
  width: 100%;
  padding: 13px 16px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.95rem;
  background: var(--color-bg);
  color: var(--color-ink);
}
.form-row input:focus,
.form-row textarea:focus,
.form-row select:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 1px;
  border-color: var(--color-primary);
}
.form-row textarea { resize: vertical; min-height: 130px; }

.required-mark {
  color: var(--color-accent-dark);
  font-size: 0.75rem;
  margin-left: 4px;
}

.contact-info-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 56px;
}
.contact-info-card {
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 26px;
  text-align: center;
}
.contact-info-card h4 { font-size: 0.95rem; margin-bottom: 8px; }
.contact-info-card p { color: var(--color-ink-soft); font-size: 0.9rem; }

/* ---------- Principles (経営理念) ---------- */
.principles {
  background: linear-gradient(165deg, #fdf4ee 0%, #fae4d4 55%, #f5d8c1 100%);
  border-radius: var(--radius-lg);
  padding: 76px 56px;
  text-align: center;
}

.principles-head { margin-bottom: 52px; }
.principles-head .eyebrow {
  background: rgba(255, 255, 255, 0.6);
  margin: 0 auto 20px;
}
.principles-head h2 {
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  letter-spacing: 0.16em;
}

.principle-list {
  display: flex;
  flex-direction: column;
  gap: 44px;
  max-width: 620px;
  margin: 0 auto;
  text-align: left;
}

.principle-label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--color-primary-dark);
  margin-bottom: 16px;
}
.principle-label .star { flex-shrink: 0; }
.principle-label .en-sub {
  font-family: var(--font-body);
  font-size: 0.82rem;
  color: var(--color-ink-soft);
  letter-spacing: 0.04em;
}

.principle-statement {
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.2vw, 1.5rem);
  color: var(--color-ink);
  line-height: 1.9;
}

.principle-photo-row {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 44px;
  align-items: center;
  text-align: left;
}
.principle-photo {
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 3/3.6;
  position: relative;
  box-shadow: var(--shadow-soft);
}
.principle-photo img {
  width: 100%; height: 100%;
  object-fit: cover;
}
.principle-photo::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(165deg, rgba(196,139,148,0.26) 0%, rgba(216,185,140,0.10) 60%, transparent 100%);
}

@media (max-width: 640px) {
  .principles { padding: 52px 26px; }
}

/* ---------- Responsive ---------- */
@media (max-width: 1000px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 860px) {
  .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .stats-strip { grid-template-columns: repeat(2, 1fr); }
  .service-block { grid-template-columns: 1fr; }
  .service-block.reverse .service-visual { order: 1; }
  .service-block.reverse .service-text { order: 2; }
  .contact-info-strip { grid-template-columns: 1fr; }
  .footer-top { flex-direction: column; }
  .hero .wrap { grid-template-columns: 1fr; }
  .hero-photo { order: -1; aspect-ratio: 16/10; }
  .principle-photo-row { grid-template-columns: 1fr !important; }
  nav.main-nav {
    position: fixed;
    top: 78px; left: 0; right: 0;
    background: var(--color-bg);
    flex-direction: column;
    align-items: stretch;
    padding: 12px 24px 24px;
    border-bottom: 1px solid var(--color-line);
    display: none;
    gap: 4px;
  }
  nav.main-nav.is-open { display: flex; }
  nav.main-nav a { padding: 14px 12px; }
  .nav-toggle { display: block; }
  .info-row { grid-template-columns: 1fr; gap: 6px; }
  .form-wrap { padding: 28px; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; scroll-behavior: auto !important; }
}