/* 住まいの工房 きづな建築 — 共通スタイル */

:root {
  --beige: #e7ded0;
  --beige-light: #f3eee5;
  --brown: #4a3b2e;
  --brown-soft: #6b5746;
  --ink: #1c1714;
  --line: #d3c7b4;
  --paper: #fbf9f4;
  --accent: #8a6a3b;
  --shadow: 0 10px 30px rgba(40, 30, 20, 0.10);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: "Noto Sans JP", sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.85;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: "Noto Serif JP", serif;
  color: var(--brown);
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: 0.02em;
}

a { color: var(--brown); text-decoration: none; transition: color .25s; }
a:hover { color: var(--accent); }

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

.wrap { width: min(1120px, 92vw); margin-inline: auto; }
.narrow { width: min(840px, 92vw); margin-inline: auto; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(251, 249, 244, 0.94);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 0;
}
.brand { display: flex; align-items: baseline; gap: 10px; line-height: 1.2; }
.brand .mark {
  font-family: "Noto Serif JP", serif;
  font-size: 1.35rem; font-weight: 700; color: var(--brown);
  letter-spacing: .04em;
}
.brand .sub { font-size: .72rem; color: var(--brown-soft); letter-spacing: .18em; }

.nav { display: flex; align-items: center; gap: 28px; }
.nav a { font-size: .92rem; color: var(--brown); position: relative; padding: 4px 0; }
.nav a::after {
  content: ""; position: absolute; left: 0; bottom: -2px; width: 0; height: 2px;
  background: var(--accent); transition: width .3s;
}
.nav a:hover::after, .nav a.current::after { width: 100%; }
.nav .tel-btn {
  background: var(--brown); color: var(--paper);
  padding: 9px 18px; border-radius: 2px; font-size: .85rem; letter-spacing: .04em;
}
.nav .tel-btn:hover { background: var(--accent); color: #fff; }

.hamburger { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 6px; }
.hamburger span { width: 26px; height: 2px; background: var(--brown); transition: .3s; }

/* ---------- Breadcrumb ---------- */
.crumb { font-size: .8rem; color: var(--brown-soft); padding: 16px 0; }
.crumb a { color: var(--brown-soft); }
.crumb span { color: var(--ink); }
.crumb .sep { margin: 0 8px; opacity: .5; }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  min-height: 78vh; display: flex; align-items: flex-end;
}
.hero img.hero-bg {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
}
.hero::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(28,23,20,.72) 0%, rgba(28,23,20,.25) 55%, rgba(28,23,20,0) 100%);
}
.hero-copy { position: relative; z-index: 2; color: #fff; padding: 0 0 9vh; max-width: 640px; }
.hero-copy .eyebrow { font-size: .8rem; letter-spacing: .3em; color: var(--beige); margin-bottom: 18px; }
.hero-copy h1 { color: #fff; font-size: clamp(1.8rem, 4.6vw, 3.2rem); line-height: 1.45; text-shadow: 0 2px 20px rgba(0,0,0,.4); }
.hero-copy p { margin-top: 22px; font-size: clamp(.95rem, 1.6vw, 1.05rem); max-width: 520px; }

/* ---------- Page header (下層) ---------- */
.page-head { position: relative; overflow: hidden; min-height: 320px; display: flex; align-items: center; }
.page-head img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.page-head::after { content: ""; position: absolute; inset: 0; background: rgba(28,23,20,.55); }
.page-head .ph-inner { position: relative; z-index: 2; color: #fff; }
.page-head .eyebrow { letter-spacing: .3em; font-size: .75rem; color: var(--beige); }
.page-head h1 { color: #fff; font-size: clamp(1.6rem, 3.6vw, 2.5rem); margin-top: 10px; }

/* ---------- Sections ---------- */
section { padding: clamp(56px, 9vw, 110px) 0; }
.sec-label { font-size: .78rem; letter-spacing: .26em; color: var(--accent); display: block; margin-bottom: 14px; }
.sec-title { font-size: clamp(1.5rem, 3vw, 2.1rem); margin-bottom: 12px; }
.lead { color: var(--brown-soft); max-width: 60ch; }

.bg-beige { background: var(--beige-light); }
.bg-brown { background: var(--brown); color: var(--beige-light); }
.bg-brown h2, .bg-brown h3 { color: var(--beige-light); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block; padding: 14px 32px; font-size: .92rem; letter-spacing: .05em;
  border-radius: 2px; transition: .25s; cursor: pointer; border: 0;
}
.btn-primary { background: var(--brown); color: var(--paper); }
.btn-primary:hover { background: var(--accent); color: #fff; transform: translateY(-2px); }
.btn-outline { background: transparent; color: var(--brown); border: 1px solid var(--brown); }
.btn-outline:hover { background: var(--brown); color: var(--paper); }
.btn-light { background: var(--beige-light); color: var(--brown); }
.btn-light:hover { background: #fff; }

/* ---------- 想い（2カラム）---------- */
.split { display: grid; grid-template-columns: 1.05fr 1fr; gap: clamp(30px, 5vw, 70px); align-items: center; }
.split.rev { grid-template-columns: 1fr 1.05fr; }
.split .media img { box-shadow: var(--shadow); }
.split .text h2 { margin-bottom: 18px; }
.split .text p + p { margin-top: 16px; }
.sign { margin-top: 24px; font-family: "Noto Serif JP", serif; color: var(--brown); }
.sign .role { font-size: .8rem; color: var(--brown-soft); }
.sign .name { font-size: 1.3rem; }

/* ---------- 対応工事カード ---------- */
.service-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 2px; background: var(--line); border: 1px solid var(--line); }
.service-cell { background: var(--paper); padding: 38px 30px; transition: background .3s; }
.service-cell:hover { background: var(--beige-light); }
.service-cell .num { font-family: "Noto Serif JP", serif; color: var(--accent); font-size: .9rem; letter-spacing: .1em; }
.service-cell h3 { font-size: 1.2rem; margin: 10px 0 12px; }
.service-cell p { font-size: .9rem; color: var(--brown-soft); }

/* ---------- 選ばれる理由（横並び/番号）---------- */
.reasons { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(24px, 4vw, 48px); }
.reason { border-top: 2px solid var(--brown); padding-top: 22px; }
.reason .big { font-family: "Noto Serif JP", serif; font-size: 2.4rem; color: var(--beige); line-height: 1; }
.bg-brown .reason { border-color: var(--accent); }
.bg-brown .reason .big { color: var(--brown-soft); }
.reason h3 { font-size: 1.15rem; margin: 8px 0 10px; }
.reason p { font-size: .9rem; }

/* ---------- 事例（横スクロール / グリッド）---------- */
.work-scroll { display: grid; grid-auto-flow: column; grid-auto-columns: min(360px, 80vw); gap: 24px; overflow-x: auto; padding-bottom: 18px; scroll-snap-type: x mandatory; }
.work-scroll::-webkit-scrollbar { height: 8px; }
.work-scroll::-webkit-scrollbar-thumb { background: var(--line); border-radius: 4px; }
.work-card { scroll-snap-align: start; background: var(--paper); border: 1px solid var(--line); overflow: hidden; transition: .3s; }
.work-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.work-card .thumb { aspect-ratio: 4/3; overflow: hidden; }
.work-card .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s; }
.work-card:hover .thumb img { transform: scale(1.06); }
.work-card .body { padding: 20px 22px; }
.work-card .tag { display: inline-block; font-size: .72rem; letter-spacing: .08em; background: var(--beige); color: var(--brown); padding: 3px 12px; border-radius: 2px; }
.work-card h3 { font-size: 1.08rem; margin: 12px 0 6px; }
.work-card .meta { font-size: .82rem; color: var(--brown-soft); }

.works-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(290px, 1fr)); gap: 30px; }

/* ビフォーアフター */
.ba { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; }
.ba figure { position: relative; }
.ba figcaption { position: absolute; top: 12px; left: 12px; background: var(--brown); color: var(--paper); font-size: .72rem; padding: 4px 12px; letter-spacing: .1em; }
.ba .after figcaption { background: var(--accent); }

/* ---------- 引用 ---------- */
.quote { border-left: 3px solid var(--accent); padding: 8px 0 8px 28px; }
.quote p { font-family: "Noto Serif JP", serif; font-size: clamp(1.1rem, 2.2vw, 1.5rem); color: var(--brown); line-height: 1.9; }
.quote cite { display: block; margin-top: 14px; font-style: normal; font-size: .85rem; color: var(--brown-soft); }

/* ---------- テーブル ---------- */
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { text-align: left; padding: 16px 18px; border-bottom: 1px solid var(--line); vertical-align: top; font-size: .92rem; }
.table th { width: 32%; color: var(--brown); font-weight: 600; background: var(--beige-light); font-family: "Noto Serif JP", serif; }

.price-table th { background: var(--brown); color: var(--beige-light); }
.price-table td .yen { font-family: "Noto Serif JP", serif; font-size: 1.05rem; color: var(--brown); }
.price-table .note { font-size: .78rem; color: var(--brown-soft); }

/* ---------- 沿革 ---------- */
.timeline { border-left: 2px solid var(--line); margin-left: 8px; }
.timeline li { list-style: none; position: relative; padding: 0 0 30px 30px; }
.timeline li::before { content: ""; position: absolute; left: -7px; top: 6px; width: 12px; height: 12px; border-radius: 50%; background: var(--accent); }
.timeline .yr { font-family: "Noto Serif JP", serif; color: var(--brown); font-size: 1.05rem; }

/* ---------- 職人紹介 ---------- */
.staff-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 30px; }
.staff img { aspect-ratio: 3/4; object-fit: cover; }
.staff h3 { font-size: 1.1rem; margin: 14px 0 2px; }
.staff .role { font-size: .8rem; color: var(--accent); letter-spacing: .06em; }
.staff p { font-size: .86rem; color: var(--brown-soft); margin-top: 8px; }

/* ---------- フォーム ---------- */
.form { display: grid; gap: 20px; }
.field { display: grid; gap: 7px; }
.field label { font-size: .88rem; color: var(--brown); font-weight: 600; }
.field label .req { color: #a8442f; font-size: .75rem; margin-left: 6px; }
.field input, .field select, .field textarea {
  font-family: inherit; font-size: .95rem; padding: 12px 14px;
  border: 1px solid var(--line); background: #fff; border-radius: 2px; color: var(--ink);
}
.field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid var(--accent); border-color: var(--accent); }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }

/* ---------- フロー ---------- */
.flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; counter-reset: step; }
.flow .step { background: var(--paper); border: 1px solid var(--line); padding: 26px 22px; position: relative; }
.flow .step::before { counter-increment: step; content: "STEP " counter(step); font-size: .72rem; letter-spacing: .12em; color: var(--accent); }
.flow .step h3 { font-size: 1.05rem; margin: 8px 0 8px; }
.flow .step p { font-size: .84rem; color: var(--brown-soft); }

/* ---------- 連絡先カード ---------- */
.contact-card { background: var(--beige-light); border: 1px solid var(--line); padding: 36px; }
.contact-card .tel-big { font-family: "Noto Serif JP", serif; font-size: clamp(1.8rem, 4vw, 2.6rem); color: var(--brown); letter-spacing: .02em; }

/* ---------- CTA帯 ---------- */
.cta-band { background: var(--brown); color: var(--beige-light); text-align: left; }
.cta-band .wrap { display: flex; align-items: center; justify-content: space-between; gap: 30px; flex-wrap: wrap; }
.cta-band h2 { color: var(--beige-light); }
.cta-band p { font-size: .92rem; margin-top: 8px; }

/* ---------- Footer ---------- */
.site-footer { background: var(--ink); color: #cbb9a3; font-size: .85rem; padding: 64px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; }
.site-footer .mark { font-family: "Noto Serif JP", serif; color: var(--beige); font-size: 1.2rem; }
.site-footer h4 { color: var(--beige); font-size: .9rem; margin-bottom: 14px; letter-spacing: .08em; }
.site-footer a { color: #cbb9a3; display: block; padding: 4px 0; }
.site-footer a:hover { color: #fff; }
.site-footer .addr { line-height: 1.9; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); margin-top: 44px; padding-top: 20px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; font-size: .76rem; color: #9a8a76; }
.disclaimer { font-size: .72rem; color: #8a7a66; margin-top: 6px; }

/* ---------- フェードイン ---------- */
.fade { opacity: 0; transform: translateY(22px); transition: opacity .8s ease, transform .8s ease; }
.fade.in { opacity: 1; transform: none; }

/* ---------- レスポンシブ ---------- */
@media (max-width: 900px) {
  .reasons { grid-template-columns: 1fr 1fr; }
  .flow { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .nav { position: fixed; inset: 60px 0 auto 0; background: var(--paper); flex-direction: column; gap: 0; padding: 10px 0 20px; border-bottom: 1px solid var(--line); transform: translateY(-130%); transition: transform .35s; box-shadow: var(--shadow); }
  .nav.open { transform: none; }
  .nav a { width: 100%; padding: 14px 8vw; border-bottom: 1px solid var(--line); }
  .nav a::after { display: none; }
  .nav .tel-btn { margin: 14px 8vw 0; text-align: center; }
  .hamburger { display: flex; }
  .split, .split.rev { grid-template-columns: 1fr; }
  .split.rev .media { order: -1; }
}
@media (max-width: 600px) {
  .field-row { grid-template-columns: 1fr; }
  .reasons { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .cta-band .wrap { flex-direction: column; align-items: flex-start; }
  .ba { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  body { font-size: 15px; }
  .flow { grid-template-columns: 1fr; }
  section { padding: 48px 0; }
  .contact-card { padding: 24px; }
}