@charset "UTF-8";

/* =========================================================
   株式会社おうち本舗 コーポレートサイト
   静的サイト用スタイルシート
   ========================================================= */

:root {
  --color-text:        #1f2937;
  --color-text-soft:   #4b5563;
  --color-text-mute:   #6b7280;
  --color-heading:     #0f172a;
  --color-bg:          #ffffff;
  --color-bg-soft:     #f7f8fa;
  --color-bg-alt:      #eef2f7;
  --color-border:      #e5e7eb;
  --color-border-soft: #edf0f4;
  --color-accent:      #0b6b4f;   /* 落ち着いた深緑 = 不動産×省エネの信頼感 */
  --color-accent-dark: #084f3b;
  --color-accent-soft: #e6f2ee;
  --color-sub:         #1e3a5f;   /* 紺 = 企業的な安定感 */
  --color-sub-soft:    #eef2f8;
  --color-warn:        #b45309;

  --radius-sm: 6px;
  --radius:    10px;
  --radius-lg: 16px;

  --shadow-sm: 0 1px 2px rgba(15, 23, 42, .04), 0 1px 1px rgba(15, 23, 42, .03);
  --shadow:    0 4px 14px rgba(15, 23, 42, .06);

  --container: 1120px;

  --font-jp: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", system-ui, sans-serif;
  --font-en: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  color: var(--color-text);
  background: var(--color-bg);
  font-family: var(--font-en), var(--font-jp);
  font-feature-settings: "palt";
  line-height: 1.8;
  font-size: 16px;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-accent-dark);
  text-decoration: none;
  transition: color .2s ease;
}
a:hover { color: var(--color-accent); }

h1, h2, h3, h4 {
  color: var(--color-heading);
  line-height: 1.45;
  font-weight: 700;
  letter-spacing: .02em;
  margin: 0 0 .6em;
}

h1 { font-size: clamp(1.75rem, 2.8vw, 2.4rem); }
h2 { font-size: clamp(1.4rem, 2.2vw, 1.85rem); }
h3 { font-size: 1.15rem; }

p  { margin: 0 0 1em; }

ul { padding-left: 1.2em; margin: 0 0 1em; }
li { margin: .3em 0; }

hr {
  border: 0;
  border-top: 1px solid var(--color-border);
  margin: 2.5rem 0;
}

/* ---------- レイアウト ---------- */

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 72px 0;
}
.section--soft { background: var(--color-bg-soft); }
.section--alt  { background: var(--color-bg-alt); }
.section--tight { padding: 48px 0; }

.section-head {
  margin-bottom: 36px;
}
.section-head .eyebrow {
  display: inline-block;
  font-size: .75rem;
  letter-spacing: .2em;
  color: var(--color-accent-dark);
  font-weight: 700;
  margin-bottom: 8px;
  text-transform: uppercase;
}
.section-head h2 {
  margin: 0 0 8px;
}
.section-head p {
  color: var(--color-text-soft);
  max-width: 720px;
}

/* ---------- ヘッダー ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, .95);
  backdrop-filter: saturate(140%) blur(6px);
  border-bottom: 1px solid var(--color-border);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  color: var(--color-heading);
  letter-spacing: .02em;
}
.brand__mark {
  width: 42px; height: 42px;
  flex-shrink: 0;
  object-fit: contain;
  display: block;
  background: #ffffff;
  border-radius: 6px;
  padding: 2px;
}
.brand__name { font-size: 1.02rem; line-height: 1.35; }
.brand__name small {
  display: block;
  font-size: .7rem;
  color: var(--color-text-mute);
  font-weight: 500;
  letter-spacing: .08em;
  margin-top: 1px;
}
.site-footer .brand__mark { filter: none; }

.nav {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav a {
  color: var(--color-text);
  font-size: .92rem;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-weight: 500;
}
.nav a:hover { background: var(--color-bg-soft); color: var(--color-accent-dark); }
.nav a.is-active { color: var(--color-accent-dark); }

.nav .btn {
  margin-left: 8px;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  width: 40px; height: 40px;
  cursor: pointer;
  padding: 0;
  align-items: center;
  justify-content: center;
}
.nav-toggle span {
  display: block;
  width: 18px; height: 2px;
  background: var(--color-heading);
  position: relative;
}
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0; width: 18px; height: 2px;
  background: var(--color-heading);
  transition: transform .2s ease;
}
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after  { top:  6px; }

/* ---------- ボタン ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: .92rem;
  font-weight: 600;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background .2s ease, color .2s ease, border-color .2s ease, transform .1s ease;
  text-align: center;
  line-height: 1.3;
}
.btn--primary {
  background: var(--color-accent);
  color: #fff;
}
.btn--primary:hover {
  background: var(--color-accent-dark);
  color: #fff;
}
.btn--outline {
  background: transparent;
  color: var(--color-accent-dark);
  border-color: var(--color-accent);
}
.btn--outline:hover {
  background: var(--color-accent-soft);
  color: var(--color-accent-dark);
}
.btn--ghost {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn--ghost:hover {
  background: var(--color-bg-soft);
  color: var(--color-heading);
}
.btn--lg { padding: 14px 26px; font-size: 1rem; }

/* ---------- ヒーロー ---------- */

.hero {
  position: relative;
  padding: 88px 0 72px;
  background: #ffffff;
  border-bottom: 1px solid var(--color-border);
}
.hero__eyebrow {
  display: inline-block;
  font-size: .78rem;
  letter-spacing: .22em;
  color: var(--color-accent-dark);
  font-weight: 700;
  margin-bottom: 14px;
  text-transform: uppercase;
}
.hero h1 {
  font-size: clamp(1.9rem, 3.6vw, 2.7rem);
  margin-bottom: .4em;
}
.hero__lead {
  font-size: 1.05rem;
  color: var(--color-text-soft);
  max-width: 640px;
  margin-bottom: 28px;
}
.hero__actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.hero--page {
  padding: 56px 0 44px;
}
.hero--page h1 { margin-bottom: .3em; }
.hero--page .hero__lead { margin-bottom: 0; }

/* パンくず */
.breadcrumb {
  font-size: .82rem;
  color: var(--color-text-mute);
  margin-bottom: 14px;
}
.breadcrumb a { color: var(--color-text-mute); }
.breadcrumb a:hover { color: var(--color-accent-dark); }
.breadcrumb span { margin: 0 6px; }

/* ---------- カード・グリッド ---------- */

.grid {
  display: grid;
  gap: 20px;
}
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color .2s ease, box-shadow .2s ease, transform .15s ease;
}
.card--hover:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow);
}
.card h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}
.card p {
  margin: 0;
  color: var(--color-text-soft);
  font-size: .95rem;
}
.card .card__icon {
  width: 40px; height: 40px;
  border-radius: 8px;
  background: var(--color-accent-soft);
  color: var(--color-accent-dark);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 14px;
}
.card .card__tag {
  display: inline-block;
  font-size: .72rem;
  letter-spacing: .15em;
  color: var(--color-accent-dark);
  font-weight: 700;
  margin-bottom: 10px;
  text-transform: uppercase;
}

.card--feature {
  border-top: 3px solid var(--color-accent);
}

/* 項目リスト（太マーカー） */
.bullet-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.bullet-list li {
  position: relative;
  padding-left: 22px;
  margin: .5em 0;
  color: var(--color-text-soft);
}
.bullet-list li::before {
  content: "";
  position: absolute;
  left: 4px; top: .7em;
  width: 8px; height: 8px;
  background: var(--color-accent);
  border-radius: 2px;
}

/* 数字付きステップ */
.steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 14px;
}
.steps li {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 18px 20px 18px 64px;
  position: relative;
  margin: 0;
}
.steps li .step__num {
  position: absolute;
  left: 18px; top: 18px;
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--color-accent);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: .9rem;
}
.steps li h3 {
  margin: 0 0 4px;
  font-size: 1rem;
}
.steps li p {
  margin: 0;
  font-size: .92rem;
  color: var(--color-text-soft);
}

/* FAQ */
.faq {
  border-top: 1px solid var(--color-border);
}
.faq__item {
  border-bottom: 1px solid var(--color-border);
  padding: 18px 4px;
}
.faq__q {
  font-weight: 700;
  color: var(--color-heading);
  position: relative;
  padding-left: 28px;
  margin: 0 0 8px;
}
.faq__q::before {
  content: "Q.";
  position: absolute;
  left: 0;
  color: var(--color-accent-dark);
  font-weight: 700;
}
.faq__a {
  color: var(--color-text-soft);
  position: relative;
  padding-left: 28px;
  margin: 0;
}
.faq__a::before {
  content: "A.";
  position: absolute;
  left: 0;
  color: var(--color-text-mute);
  font-weight: 700;
}

/* 表 */
.table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}
.table th, .table td {
  padding: 14px 18px;
  text-align: left;
  font-size: .94rem;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}
.table th {
  background: var(--color-bg-soft);
  font-weight: 600;
  color: var(--color-heading);
  width: 30%;
  white-space: nowrap;
}
.table tr:last-child th,
.table tr:last-child td {
  border-bottom: none;
}

/* CTA帯 */
.cta-band {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-sub) 100%);
  color: #fff;
  padding: 48px 0;
}
.cta-band h2 {
  color: #fff;
  margin: 0 0 .4em;
}
.cta-band p {
  color: rgba(255, 255, 255, .9);
  margin: 0 0 20px;
}
.cta-band .btn--primary {
  background: #fff;
  color: var(--color-accent-dark);
}
.cta-band .btn--primary:hover {
  background: #fff;
  color: var(--color-accent);
}
.cta-band .btn--outline {
  color: #fff;
  border-color: rgba(255,255,255,.7);
}
.cta-band .btn--outline:hover {
  background: rgba(255,255,255,.12);
  color: #fff;
}

/* ノート・注釈 */
.note {
  background: var(--color-bg-soft);
  border-left: 3px solid var(--color-accent);
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  color: var(--color-text-soft);
  font-size: .92rem;
}
.note strong { color: var(--color-heading); }

/* アンカー見出し */
.anchor-h2 {
  scroll-margin-top: 80px;
  border-left: 4px solid var(--color-accent);
  padding-left: 14px;
  margin-top: 2rem;
}

/* 補足タグ */
.tag {
  display: inline-block;
  background: var(--color-accent-soft);
  color: var(--color-accent-dark);
  font-size: .75rem;
  padding: 3px 10px;
  border-radius: 999px;
  font-weight: 600;
  letter-spacing: .05em;
  margin-right: 4px;
}
.tag--sub {
  background: var(--color-sub-soft);
  color: var(--color-sub);
}

/* フォーム */
.two-col {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 40px;
}
@media (max-width: 820px) {
  .two-col { grid-template-columns: 1fr; gap: 32px; }
}

.form {
  display: grid;
  gap: 18px;
  max-width: 640px;
}
.form label {
  display: block;
  font-weight: 600;
  font-size: .9rem;
  margin-bottom: 6px;
  color: var(--color-heading);
}
.form input[type="text"],
.form input[type="email"],
.form input[type="tel"],
.form select,
.form textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: #fff;
  font: inherit;
  color: var(--color-text);
  transition: border-color .2s ease, box-shadow .2s ease;
}
.form input:focus,
.form select:focus,
.form textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(11, 107, 79, .12);
}
.form textarea { min-height: 140px; resize: vertical; }

.required {
  color: #b91c1c;
  font-size: .75rem;
  margin-left: 4px;
}

/* ---------- フッター ---------- */

.site-footer {
  background: #0f172a;
  color: #cbd5e1;
  padding: 48px 0 24px;
  font-size: .9rem;
}
.site-footer a { color: #cbd5e1; }
.site-footer a:hover { color: #fff; }

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 28px;
  margin-bottom: 32px;
}
.footer-grid h4 {
  color: #fff;
  font-size: .82rem;
  letter-spacing: .15em;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.footer-grid ul {
  list-style: none;
  padding: 0; margin: 0;
}
.footer-grid li { margin: .35em 0; }

.site-footer .brand {
  color: #fff;
  margin-bottom: 10px;
}
.site-footer .brand__name small { color: #94a3b8; }
.footer-about {
  color: #94a3b8;
  font-size: .88rem;
  line-height: 1.8;
}

.copyright {
  border-top: 1px solid rgba(255,255,255,.08);
  padding-top: 18px;
  font-size: .8rem;
  color: #94a3b8;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- トップページ専用 ---------- */

.business-lead {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 28px;
  align-items: center;
}

.feature-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}
.feature-item {
  padding: 16px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}
.feature-item h3 {
  margin: 0 0 6px;
  font-size: 1rem;
  color: var(--color-heading);
}
.feature-item p {
  margin: 0;
  color: var(--color-text-soft);
  font-size: .92rem;
}

.highlight-card {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
  color: #fff;
  border-radius: var(--radius-lg);
  padding: 36px;
  position: relative;
  overflow: hidden;
}
.highlight-card h2 {
  color: #fff;
  margin-bottom: .4em;
}
.highlight-card p {
  color: rgba(255,255,255,.92);
  margin-bottom: 18px;
}
.highlight-card .btn--primary {
  background: #fff;
  color: var(--color-accent-dark);
}
.highlight-card .btn--primary:hover {
  background: #f3faf7;
}

/* スコープ表（省エネ診断ページ） */
.scope-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.scope-item {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  font-size: .94rem;
  color: var(--color-heading);
  font-weight: 500;
}
.scope-item small {
  display: block;
  color: var(--color-text-mute);
  font-weight: 400;
  font-size: .82rem;
  margin-top: 3px;
}

/* 目次（省エネ診断ページ） */
.toc {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 18px 22px;
  margin-bottom: 28px;
}
.toc h4 {
  margin: 0 0 8px;
  font-size: .82rem;
  letter-spacing: .15em;
  color: var(--color-text-mute);
  text-transform: uppercase;
  font-weight: 700;
}
.toc ol {
  margin: 0;
  padding-left: 20px;
  columns: 2;
  column-gap: 28px;
  font-size: .92rem;
}
.toc ol li { margin: .25em 0; }
.toc ol a { color: var(--color-text); }
.toc ol a:hover { color: var(--color-accent-dark); }

/* ---------- レスポンシブ ---------- */

@media (max-width: 960px) {
  .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .business-lead { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .scope-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  .section { padding: 56px 0; }
  .hero { padding: 64px 0 52px; }

  .nav {
    display: none;
    position: absolute;
    top: 64px; left: 0; right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 16px 20px;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow);
  }
  .nav.is-open { display: flex; }
  .nav a {
    padding: 12px 8px;
    border-radius: 0;
    border-bottom: 1px solid var(--color-border-soft);
  }
  .nav a:last-of-type { border-bottom: none; }
  .nav .btn { margin: 10px 0 0; }
  .nav-toggle { display: inline-flex; }

  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .feature-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .scope-grid { grid-template-columns: 1fr 1fr; }
  .toc ol { columns: 1; }
  .table th { width: 40%; }
  .table th, .table td { padding: 12px 14px; font-size: .9rem; }
  .copyright { flex-direction: column; }
}

@media (max-width: 420px) {
  body { font-size: 15.5px; }
  .hero h1 { font-size: 1.55rem; }
  .highlight-card { padding: 24px; }
  .scope-grid { grid-template-columns: 1fr; }
}