/* ========== リセット・ベース ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary:      #6B4A3A;
  --primary-dark: #3D2B1F;
  --accent:       #4A7C59;
  --accent-dark:  #38613f;
  --bg:           #FBF9F6;
  --bg-dark:      #F2EDE6;
  --text:         #3D2B1F;
  --text-light:   #7a6457;
  --white:        #fff;
  --border:       #e8ddd5;
  --shadow:       0 4px 20px rgba(61,43,31,.08);
  --radius:       10px;
  --serif:        'Noto Serif JP', serif;
  --sans:         'Noto Sans JP', sans-serif;
  --header-h:     72px;
}

html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--sans); color: var(--text); line-height: 1.7; background: var(--bg); }
img  { max-width: 100%; height: auto; display: block; }
a    { text-decoration: none; color: inherit; }
ul   { list-style: none; }

/* ========== 共通 ========== */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}
.section      { padding: 88px 0; }
.section--bg  { background: var(--bg-dark); }

.section__title {
  font-family: var(--sans);
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  font-weight: 700;
  color: var(--primary);
  text-align: center;
  margin-bottom: 16px;
}
.section__title--white { color: var(--white); }

.section__desc {
  text-align: center;
  color: var(--text-light);
  margin-bottom: 52px;
  font-size: .95rem;
}
.section__desc--white { color: rgba(255,255,255,.82); }

.accent { color: var(--accent); }

/* ========== ボタン ========== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 6px;
  font-family: var(--sans);
  font-size: .9rem;
  font-weight: 700;
  cursor: pointer;
  transition: all .22s;
  border: 2px solid transparent;
  white-space: nowrap;
}
.btn--accent {
  background: var(--accent);
  color: var(--white);
  border-color: var(--accent);
}
.btn--accent:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
  transform: translateY(-1px);
}
.btn--primary {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
}
.btn--primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
}
.btn--outline {
  background: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,.85);
}
.btn--outline:hover {
  background: var(--white);
  color: var(--primary);
  border-color: var(--white);
}
.btn--lg   { padding: 16px 36px; font-size: 1rem; }
.btn--full { width: 100%; justify-content: center; }

/* ========== ヘッダー ========== */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  background: var(--white);
  box-shadow: 0 2px 12px rgba(61,43,31,.08);
  z-index: 100;
  transition: box-shadow .3s;
}
.header__inner {
  max-width: 1200px;
  margin: 0 auto;
  height: 100%;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 28px;
}
.header__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  text-decoration: none;
}
.header__logo-mark {
  width: 40px;
  height: 40px;
  background: var(--accent);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 1.1rem;
  flex-shrink: 0;
}
.header__logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}
.header__logo-main {
  font-family: var(--sans);
  font-size: .95rem;
  font-weight: 700;
  color: var(--primary);
}
.header__logo-sub {
  font-size: .62rem;
  color: var(--text-light);
  letter-spacing: .08em;
}

.header__nav { margin-left: auto; }
.header__nav-list {
  display: flex;
  gap: 24px;
}
.header__nav-list a {
  font-size: .82rem;
  color: var(--text);
  font-weight: 500;
  transition: color .2s;
  position: relative;
}
.header__nav-list a::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 0; right: 0;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transition: transform .2s;
}
.header__nav-list a:hover { color: var(--accent); }
.header__nav-list a:hover::after { transform: scaleX(1); }

.header__cta { margin-left: 16px; flex-shrink: 0; }

.header__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  margin-left: auto;
}
.header__hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--primary);
  transition: all .3s;
  transform-origin: center;
}
.header__hamburger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.header__hamburger.is-open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.header__hamburger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* モバイルナビ */
.mobile-nav {
  position: fixed;
  top: var(--header-h);
  left: 0; right: 0;
  background: var(--primary);
  z-index: 99;
  transform: translateY(-110%);
  opacity: 0;
  transition: transform .35s ease, opacity .25s ease;
  pointer-events: none;
}
.mobile-nav.is-open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}
.mobile-nav__link {
  display: block;
  padding: 16px 24px;
  color: rgba(255,255,255,.85);
  font-size: .95rem;
  border-bottom: 1px solid rgba(255,255,255,.1);
  transition: color .2s, background .2s;
}
.mobile-nav__link:hover { color: var(--white); background: rgba(255,255,255,.07); }
.mobile-nav__link--cta {
  background: var(--accent);
  color: var(--white) !important;
  text-align: center;
  font-weight: 700;
  border: none;
}
.mobile-nav__link--cta:hover { background: var(--accent-dark); }

/* ========== ファーストビュー ========== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-h);
  overflow: hidden;
}
.hero__bg {
  position: absolute;
  inset: 0;
}
.hero__bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 20%;
}
/* 会計LPと差別化：左側をウォームブラウンで覆い、右は透過 */
.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    105deg,
    rgba(61, 43, 31, .90) 0%,
    rgba(61, 43, 31, .78) 45%,
    rgba(107, 74, 58, .50) 75%,
    rgba(107, 74, 58, .20) 100%
  );
}
.hero__inner {
  position: relative;
  z-index: 1;
  max-width: 1100px;
  margin: 0 auto;
  padding: 80px 24px;
  max-width: 680px;
  margin-left: 6vw;
}
.hero__label {
  display: inline-block;
  font-size: .78rem;
  font-weight: 700;
  color: var(--white);
  background: var(--accent);
  padding: 5px 14px;
  border-radius: 4px;
  letter-spacing: .08em;
  margin-bottom: 24px;
}
.hero__title {
  font-family: var(--sans);
  font-size: clamp(2.4rem, 5.5vw, 4.2rem);
  font-weight: 700;
  color: var(--white);
  line-height: 1.3;
  margin-bottom: 24px;
}
.hero__desc {
  font-size: clamp(.9rem, 1.8vw, 1.05rem);
  color: rgba(255,255,255,.88);
  margin-bottom: 44px;
  line-height: 2;
}
.hero__btns {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.hero__scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  color: rgba(255,255,255,.6);
  font-size: 1.2rem;
  animation: bounce 2s infinite;
  z-index: 1;
}
@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(8px); }
}

/* ========== コンセプト ========== */
.concept__inner {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 72px;
  align-items: center;
}
.concept__img-placeholder {
  aspect-ratio: 3/4;
  background: linear-gradient(145deg, var(--bg-dark) 0%, var(--border) 100%);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: var(--text-light);
  font-size: .85rem;
  border: 2px dashed var(--border);
}
.concept__img-placeholder i {
  font-size: 2.5rem;
  color: var(--primary);
  opacity: .5;
}

/* ポートレート画像（代表） */
.concept__img {
  margin: 0;
  aspect-ratio: 3 / 4;
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
  box-shadow: 0 14px 40px rgba(61,43,31,.18);
  background: linear-gradient(145deg, #e8ddd0 0%, #d8c8b4 100%);
}
.concept__portrait {
  width: 100%;
  height: 100%;
  display: block;
}
.concept__photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
  display: block;
}
.concept__img-caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 16px 22px 18px;
  background: linear-gradient(to top, rgba(31,22,16,.85) 0%, rgba(31,22,16,.55) 60%, transparent 100%);
  color: var(--white);
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.concept__img-name {
  font-family: var(--serif);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: .02em;
}
.concept__img-role {
  font-size: .72rem;
  color: rgba(255,255,255,.78);
  letter-spacing: .04em;
}
.concept__eyebrow {
  font-size: .78rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: .12em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.concept__title {
  font-family: var(--serif);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  color: var(--primary);
  line-height: 1.45;
  margin-bottom: 24px;
}
.concept__text {
  font-size: .9rem;
  color: var(--text-light);
  line-height: 2;
  margin-bottom: 16px;
}
.concept__sign {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.concept__sign span { font-size: .78rem; color: var(--text-light); }
.concept__sign strong {
  font-family: var(--serif);
  font-size: 1.1rem;
  color: var(--primary);
  font-weight: 700;
}

/* ========== 選ばれる理由 ========== */
.reasons__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.reasons__card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 44px 28px;
  text-align: center;
  box-shadow: var(--shadow);
  border-bottom: 4px solid var(--accent);
  transition: transform .25s, box-shadow .25s;
}
.reasons__card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 32px rgba(61,43,31,.12);
}
.reasons__icon {
  width: 72px;
  height: 72px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 22px;
  font-size: 1.6rem;
  color: var(--white);
}
.reasons__title {
  font-family: var(--sans);
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 14px;
}
.reasons__desc {
  font-size: .85rem;
  color: var(--text-light);
  line-height: 1.9;
}

/* ========== ギャラリー ========== */
.gallery__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.gallery__item { overflow: hidden; border-radius: var(--radius); }
.gallery__thumb {
  aspect-ratio: 4 / 3;
  position: relative;
  overflow: hidden;
  cursor: pointer;
}
/* 施工事例の画像（読み込み失敗時は下のCSSグラデーションがフォールバック） */
.gallery__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .55s ease;
}
.gallery__thumb:hover .gallery__img { transform: scale(1.06); }
/* 施工事例の疑似画像（プレースホルダー） */
.gallery__thumb--1 { background: linear-gradient(145deg, #b5956e 0%, #8a6a4a 100%); }
.gallery__thumb--2 { background: linear-gradient(145deg, #7a9b72 0%, #4a7c59 100%); }
.gallery__thumb--3 { background: linear-gradient(145deg, #a08060 0%, #6B4A3A 100%); }
.gallery__thumb--4 { background: linear-gradient(145deg, #6a8c6a 0%, #3d6b4a 100%); }
.gallery__thumb--5 { background: linear-gradient(145deg, #c4a882 0%, #9a7050 100%); }
.gallery__thumb--6 { background: linear-gradient(145deg, #5a7a5a 0%, #3a5a3a 100%); }

.gallery__overlay {
  position: absolute;
  inset: 0;
  background: rgba(61,43,31,.55);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-end;
  padding: 20px;
  opacity: 0;
  transition: opacity .3s;
}
.gallery__thumb:hover .gallery__overlay { opacity: 1; }
.gallery__tag {
  font-size: .72rem;
  font-weight: 700;
  background: var(--accent);
  color: var(--white);
  padding: 3px 10px;
  border-radius: 3px;
  margin-bottom: 8px;
}
.gallery__caption {
  font-size: .82rem;
  color: var(--white);
  line-height: 1.5;
}

/* ========== 家づくりの流れ ========== */
.process__list {
  display: flex;
  align-items: flex-start;
  gap: 0;
  overflow-x: auto;
  padding-bottom: 8px;
}
.process__item {
  flex: 1;
  min-width: 160px;
  text-align: center;
  padding: 0 12px;
}
.process__num {
  font-family: var(--serif);
  font-size: 2rem;
  font-weight: 700;
  color: var(--border);
  line-height: 1;
  margin-bottom: 4px;
}
.process__icon {
  width: 64px;
  height: 64px;
  background: var(--white);
  border: 3px solid var(--accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 1.3rem;
  color: var(--accent);
}
.process__title {
  font-size: .95rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
}
.process__desc {
  font-size: .78rem;
  color: var(--text-light);
  line-height: 1.7;
}
.process__arrow {
  flex-shrink: 0;
  color: var(--accent);
  font-size: 1.1rem;
  padding-top: 40px;
  opacity: .5;
}

/* ========== お客様の声 ========== */
.testimonials__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.testimonials__card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 32px 24px;
  box-shadow: var(--shadow);
}
.testimonials__avatar {
  width: 64px;
  height: 64px;
  background: var(--bg-dark);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  color: var(--text-light);
  margin-bottom: 14px;
  overflow: hidden;
  border: 3px solid var(--white);
  box-shadow: 0 2px 8px rgba(61,43,31,.12);
}
.testimonials__avatar svg {
  width: 100%;
  height: 100%;
  display: block;
}
.testimonials__stars {
  color: #e8a020;
  font-size: .85rem;
  margin-bottom: 14px;
  letter-spacing: 2px;
}
.testimonials__text {
  font-size: .87rem;
  line-height: 1.9;
  color: var(--text);
  margin-bottom: 16px;
}
.testimonials__meta {
  font-size: .75rem;
  color: var(--text-light);
  font-weight: 500;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

/* ========== 料金 ========== */
.pricing__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  max-width: 820px;
  margin: 0 auto;
}
.pricing__card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 44px 36px;
  box-shadow: var(--shadow);
  border: 2px solid transparent;
  position: relative;
}
.pricing__card--featured {
  border-color: var(--accent);
}
.pricing__badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: var(--white);
  font-size: .75rem;
  font-weight: 700;
  padding: 5px 18px;
  border-radius: 20px;
  white-space: nowrap;
}
.pricing__head { margin-bottom: 28px; }
.pricing__plan {
  font-family: var(--sans);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--primary);
  display: block;
  margin-bottom: 8px;
}
.pricing__plan-desc { font-size: .82rem; color: var(--text-light); line-height: 1.6; }
.pricing__price-wrap {
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}
.pricing__from {
  display: block;
  font-size: .75rem;
  color: var(--text-light);
  margin-bottom: 4px;
}
.pricing__price {
  font-family: var(--serif);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary);
}
.pricing__list { margin-bottom: 28px; }
.pricing__list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: .88rem;
  padding: 9px 0;
  border-bottom: 1px solid var(--bg-dark);
}
.pricing__list li .fa-check { color: var(--accent); flex-shrink: 0; }
.pricing__note {
  text-align: center;
  font-size: .78rem;
  color: var(--text-light);
  margin-top: 28px;
  max-width: 820px;
  margin-left: auto;
  margin-right: auto;
}

/* ========== FAQ ========== */
.faq__list {
  max-width: 760px;
  margin: 0 auto;
}
.faq__item { border-bottom: 1px solid var(--border); }
.faq__question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 4px;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  font-family: var(--sans);
  font-size: .95rem;
  font-weight: 700;
  color: var(--primary);
  transition: color .2s;
}
.faq__question:hover { color: var(--accent); }
.faq__icon {
  flex-shrink: 0;
  color: var(--accent);
  transition: transform .35s ease;
}
.faq__question[aria-expanded="true"] .faq__icon { transform: rotate(180deg); }
.faq__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .4s ease;
}
.faq__answer p {
  padding: 0 4px 22px;
  font-size: .88rem;
  color: var(--text-light);
  line-height: 1.9;
}

/* ========== お問い合わせ ========== */
.contact {
  background: linear-gradient(135deg, var(--primary) 0%, #9a6b52 100%);
}
.contact__form {
  max-width: 760px;
  margin: 0 auto;
}
.contact__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.contact__field { margin-bottom: 20px; }
.contact__field label {
  display: block;
  font-size: .85rem;
  font-weight: 700;
  color: rgba(255,255,255,.92);
  margin-bottom: 8px;
}
.contact__required {
  background: var(--accent);
  color: var(--white);
  font-size: .7rem;
  padding: 2px 8px;
  border-radius: 2px;
  margin-left: 8px;
  vertical-align: middle;
  font-weight: 400;
}
.contact__field input,
.contact__field select,
.contact__field textarea {
  width: 100%;
  padding: 13px 16px;
  background: rgba(255,255,255,.96);
  border: 2px solid transparent;
  border-radius: var(--radius);
  font-family: var(--sans);
  font-size: .9rem;
  color: var(--text);
  transition: border-color .2s;
  appearance: none;
}
.contact__field select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23666' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 40px;
}
.contact__field input:focus,
.contact__field select:focus,
.contact__field textarea:focus {
  outline: none;
  border-color: var(--accent);
}
.contact__field textarea { resize: vertical; }

/* ========== フッター ========== */
.footer {
  background: var(--primary-dark);
  color: rgba(255,255,255,.6);
  padding: 52px 0 24px;
}
.footer__inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px 36px;
  display: flex;
  gap: 56px;
  align-items: flex-start;
  flex-wrap: wrap;
  border-bottom: 1px solid rgba(255,255,255,.1);
}
.footer__brand { flex-shrink: 0; }
.footer__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--sans);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 10px;
}
.footer__logo i { color: var(--accent); font-size: 1.2rem; }
.footer__tagline {
  font-size: .78rem;
  color: rgba(255,255,255,.45);
  font-style: italic;
}
.footer__info { font-size: .82rem; line-height: 2.1; }
.footer__info p {
  display: flex;
  align-items: center;
  gap: 10px;
}
.footer__info i { color: var(--accent); width: 14px; flex-shrink: 0; }
.footer__copy {
  text-align: center;
  font-size: .78rem;
  padding-top: 20px;
}
.footer__sample {
  text-align: center;
  font-size: .72rem;
  color: rgba(255,255,255,.3);
  margin-top: 6px;
}

/* ========== レスポンシブ ========== */
@media (max-width: 1024px) {
  .concept__inner { grid-template-columns: 1fr; gap: 40px; }
  .concept__img-placeholder { aspect-ratio: 16/7; }
  .concept__img { aspect-ratio: 4 / 3; max-width: 480px; margin: 0 auto; }
  .reasons__grid { grid-template-columns: 1fr; gap: 20px; }
}

@media (max-width: 768px) {
  :root { --header-h: 60px; }

  .header__nav,
  .header__cta   { display: none; }
  .header__hamburger { display: flex; }

  .hero { min-height: 88vh; }
  .hero__inner { margin-left: 0; max-width: 100%; }
  .hero__btns  { flex-direction: column; align-items: flex-start; }

  .reasons__grid      { grid-template-columns: 1fr; }
  .gallery__grid      { grid-template-columns: repeat(2, 1fr); }
  .testimonials__grid { grid-template-columns: 1fr; }
  .pricing__grid      { grid-template-columns: 1fr; max-width: 100%; }

  .process__list { gap: 0; }
  .process__arrow { padding-top: 36px; font-size: .9rem; }

  .contact__row  { grid-template-columns: 1fr; }
  .footer__inner { flex-direction: column; gap: 24px; }
  .section       { padding: 64px 0; }
}

@media (max-width: 480px) {
  .gallery__grid { grid-template-columns: 1fr; }
  .hero__title   { font-size: 2.2rem; }
  .process__list { flex-direction: column; align-items: center; }
  .process__arrow { padding-top: 0; transform: rotate(90deg); }
  .process__item { min-width: auto; width: 100%; max-width: 300px; }
}