:root { --bg:#faf8f5; --alt:#f0ece6; --text:#2a2622; --muted:#6f675e; --accent:#8a6a43; --dark:#2a2622; --border:#ddd5ca; }
@media (prefers-color-scheme: dark) {
  :root { --bg:#161412; --alt:#1e1b18; --text:#efe9e1; --muted:#a79d90; --accent:#c8a574; --dark:#0f0d0c; --border:#322d28; }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 64px; }
body { margin:0; background:var(--bg); color:var(--text); line-height:1.9;
  font-family:-apple-system,"Hiragino Sans","Noto Sans JP",sans-serif; }
.wrap { max-width:1000px; margin:0 auto; padding:0 16px; }
a { color:var(--accent); }
.note { color:var(--muted); font-size:13px; margin:0 0 24px; }

.header { position:sticky; top:0; z-index:10; background:var(--bg); border-bottom:1px solid var(--border); }
.bar { display:flex; justify-content:space-between; align-items:center; min-height:56px; gap:8px 16px; flex-wrap:wrap; }
.logo { font-weight:700; color:var(--text); text-decoration:none; }
.logo small { font-weight:400; color:var(--muted); }
nav { display:flex; align-items:center; gap:16px; font-size:14px; flex-wrap:wrap; }
nav a { color:var(--text); text-decoration:none; }
nav a:hover { color:var(--accent); }
.nav-cta { background:var(--accent); color:#fff !important; padding:6px 16px; border-radius:999px; }
@media (max-width:640px) { nav a:not(.nav-cta) { display:none; } }

.hero { padding:112px 0 96px; background:linear-gradient(rgba(38,28,18,.62),rgba(38,28,18,.5)),url(images/hero.jpg) center/cover no-repeat,#4a3b2a; color:#fff; }
.eyebrow { letter-spacing:.2em; font-size:13px; margin:0 0 16px; opacity:.85; }
.hero h1 { font-size:clamp(28px,6vw,48px); line-height:1.4; margin:0 0 20px; font-weight:700; }
.lead { max-width:560px; margin:0 0 32px; opacity:.92; }
.cta-row { display:flex; gap:12px; flex-wrap:wrap; }

.btn { display:inline-block; background:var(--accent); color:#fff; padding:14px 28px; border-radius:999px; text-decoration:none; font-weight:600; }
.hero .btn { background:#fff; color:#4a3b2a; }
.btn.ghost, .hero .btn.ghost { background:transparent; color:#fff; border:1px solid rgba(255,255,255,.7); }
.btn.light { background:#fff; color:#4a3b2a; }

.section { padding:80px 0; }
.section.alt { background:var(--alt); }
.section h2 { font-size:clamp(22px,4vw,30px); margin:0 0 32px; line-height:1.5; }

.checks { list-style:none; margin:0 0 32px; padding:0; display:grid; gap:12px; }
.checks li { padding:14px 16px 14px 44px; border:1px solid var(--border); border-radius:10px; background:var(--alt); position:relative; }
.checks li::before { content:"✓"; position:absolute; left:16px; color:var(--accent); font-weight:700; }
.answer { font-weight:700; font-size:18px; color:var(--accent); margin:0; }

.cards { display:grid; grid-template-columns:repeat(auto-fit,minmax(260px,1fr)); gap:16px; }
.cards article { background:var(--bg); border:1px solid var(--border); border-radius:14px; padding:24px; }
.cards .num { color:var(--accent); font-weight:700; letter-spacing:.1em; }
.cards h3 { margin:4px 0 8px; font-size:18px; }
.cards p { margin:0; color:var(--muted); }

.works { display:grid; grid-template-columns:repeat(auto-fit,minmax(260px,1fr)); gap:20px; }
.works figure { margin:0; }
.works img { display:block; width:100%; height:auto; aspect-ratio:4/3; object-fit:cover; border-radius:12px; }
.ph { aspect-ratio:4/3; border-radius:12px; display:grid; place-items:center; color:rgba(255,255,255,.8); letter-spacing:.2em; font-size:13px; }
.p1 { background:linear-gradient(135deg,#6b5a46,#b79a73); }
.p2 { background:linear-gradient(135deg,#4d4a45,#9b948a); }
.p3 { background:linear-gradient(135deg,#7a4f3a,#c58f6e); }
figcaption { margin-top:8px; font-size:14px; color:var(--muted); }
figcaption b { display:inline-block; margin-right:8px; color:var(--accent); }

.steps { list-style:none; counter-reset:s; margin:0 0 16px; padding:0; display:grid; gap:12px; }
.steps li { counter-increment:s; display:grid; grid-template-columns:44px 1fr; column-gap:12px; padding:16px; background:var(--bg); border:1px solid var(--border); border-radius:10px; }
.steps li::before { content:counter(s); grid-row:span 2; width:36px; height:36px; border-radius:50%; background:var(--accent); color:#fff; display:grid; place-items:center; font-weight:700; }
.steps span { color:var(--muted); font-size:14px; }

details { border-bottom:1px solid var(--border); padding:16px 0; }
summary { cursor:pointer; font-weight:600; }
details p { margin:8px 0 0; color:var(--muted); }

.cta { background:var(--dark); color:#efe9e1; text-align:center; }
.cta p { margin:0 0 24px; }
.cta .small { margin:16px 0 0; font-size:13px; opacity:.7; }

.footer { padding:32px 0; text-align:center; color:var(--muted); font-size:13px; }
.footer p { margin:0; }

/* --- 資料反映（7章）で追加 --- */
.prose { max-width:720px; margin:0 0 16px; }
.tags { display:flex; flex-wrap:wrap; gap:8px; margin-top:24px; }
.tags span { border:1px solid var(--accent); color:var(--accent); border-radius:999px; padding:4px 14px; font-size:14px; }
.answer { margin:24px 0 16px; }
.compare { border:1px solid var(--border); border-radius:12px; overflow:hidden; background:var(--bg); }
.compare .row { display:grid; grid-template-columns:110px 1fr 1fr; }
.compare .row > span { padding:12px 14px; border-top:1px solid var(--border); font-size:14px; }
.compare .row.head > span { border-top:0; font-weight:700; background:var(--alt); }
.compare .row > span:first-child { color:var(--muted); font-weight:600; }
.compare .us { background:rgba(138,106,67,.12); font-weight:600; }
@media (max-width:520px) { .compare .row { grid-template-columns:72px 1fr 1fr; } .compare .row > span { padding:10px 8px; font-size:13px; } }
.cards .price { font-size:24px; font-weight:700; color:var(--accent); margin:4px 0 12px; line-height:1.4; }
.cards .price small { display:block; font-size:12px; font-weight:400; color:var(--muted); }
.cards ul { margin:0 0 12px; padding-left:20px; color:var(--muted); font-size:14px; }
.cards .opt, .cards .out, .cards .term { font-size:13px; margin:8px 0 0; }
.cards .out b { display:block; color:var(--text); }
.cards .term { color:var(--accent); font-weight:600; }

/* --- 参考サイト情報反映（8章）で追加 --- */
.info { display:grid; grid-template-columns:110px 1fr; margin:16px 0 0; max-width:720px; }
.info dt, .info dd { margin:0; padding:12px 0; border-bottom:1px solid var(--border); }
.info dt { font-weight:600; color:var(--muted); }
@media (max-width:520px) { .info { grid-template-columns:84px 1fr; } }
.cta .tel { color:#fff; }

/* --- 空間改善提案書の反映（9章）で追加 --- */
.sub { font-size:18px; margin:32px 0 16px; }
.viewpoints { display:grid; grid-template-columns:repeat(auto-fit,minmax(260px,1fr)); gap:12px; }
.viewpoints div { border:1px solid var(--border); border-radius:10px; padding:14px 16px; background:var(--alt); }
.viewpoints b { display:block; color:var(--accent); }
.viewpoints span { font-size:14px; color:var(--muted); }
.proposals { list-style:none; counter-reset:p; margin:0; padding:0; display:grid; gap:12px; }
.proposals li { counter-increment:p; position:relative; padding:16px 16px 16px 56px; border:1px solid var(--border); border-radius:10px; background:var(--bg); }
.proposals li::before { content:counter(p); position:absolute; left:16px; top:16px; width:28px; height:28px; border-radius:50%; background:var(--accent); color:#fff; display:grid; place-items:center; font-weight:700; font-size:14px; }
.proposals b { display:block; }
.proposals span { display:block; font-size:14px; color:var(--muted); }
.proposals em { display:block; margin-top:6px; font-size:13px; font-style:normal; font-weight:600; color:var(--accent); }

/* --- 画像反映（10章）で追加 --- */
.brand-chip { display:inline-block; margin:0 0 16px; padding:8px; background:#fff; border-radius:12px; line-height:0; }
.brand-chip img { width:96px; height:96px; }

/* --- 電話のみ化（12章）で追加 --- */
.nowrap { white-space:nowrap; }

/* --- 「こんなことありませんか？」の強調（18章）で追加 --- */
#concern { background:var(--alt); border-top:4px solid var(--accent); }
#concern h2 { font-size:clamp(26px,5vw,36px); text-align:center; margin-bottom:12px; }
#concern h2::before { content:"CHECK"; display:block; font-size:13px; letter-spacing:.3em; color:var(--accent); margin-bottom:8px; }
#concern h2::after { content:""; display:block; width:56px; height:3px; background:var(--accent); margin:16px auto 0; }
#concern .checks { grid-template-columns:repeat(auto-fit,minmax(260px,1fr)); margin-top:32px; }
#concern .checks li { background:var(--bg); border:2px solid var(--accent); font-size:17px; font-weight:700; padding:16px 16px 16px 52px; }
#concern .checks li::before { content:"✓"; left:14px; top:50%; transform:translateY(-50%); width:26px; height:26px; border-radius:50%; background:var(--accent); color:#fff; display:grid; place-items:center; font-size:15px; }
#concern .answer { text-align:center; font-size:clamp(17px,3.5vw,22px); line-height:1.7; padding:24px 16px; border-radius:12px; background:var(--accent); color:#fff; margin-top:32px; }
@media (prefers-color-scheme: dark) {
  #concern .answer, #concern .checks li::before { color:#1b1510; }
}

/* --- ヒーローのスタイリッシュ化（19章）で追加 --- */
.hero { position:relative; min-height:min(88vh,780px); display:flex; align-items:center; padding:120px 0 140px;
  background:linear-gradient(90deg,rgba(18,12,7,.82) 0%,rgba(18,12,7,.5) 55%,rgba(18,12,7,.12) 100%),url(images/hero.jpg) center/cover no-repeat,#2a2018; }
.hero .wrap { width:100%; }
.hero .eyebrow { display:flex; align-items:center; gap:16px; font-size:12px; letter-spacing:.45em; text-transform:uppercase; margin:0 0 28px; opacity:.9; }
.hero .eyebrow::before { content:""; width:48px; height:1px; background:currentColor; }
.hero h1 { font-family:"Hiragino Mincho ProN","Yu Mincho","Noto Serif JP",serif; font-weight:500; font-size:clamp(34px,7vw,68px); letter-spacing:.14em; line-height:1.5; margin:0 0 28px; text-shadow:0 2px 24px rgba(0,0,0,.35); }
.hero .lead { max-width:460px; font-size:15px; letter-spacing:.08em; line-height:2; opacity:.9; margin:0 0 44px; }
.hero .cta-row { gap:28px; align-items:center; }
.hero .btn { border-radius:2px; padding:16px 36px; letter-spacing:.12em; font-size:14px; background:#fff; color:#2a2018; }
.hero .btn.ghost { background:transparent; color:#fff; border:0; border-bottom:1px solid rgba(255,255,255,.7); border-radius:0; padding:8px 2px; }
.hero::after { content:"SCROLL"; position:absolute; left:50%; bottom:56px; transform:translateX(-50%); font-size:10px; letter-spacing:.4em; opacity:.8; color:#fff; }
.hero::before { content:""; position:absolute; left:50%; bottom:0; width:1px; height:44px; background:rgba(255,255,255,.7); }
@media (max-width:640px) {
  .hero { min-height:min(86vh,640px); padding:96px 0 120px; background:linear-gradient(rgba(18,12,7,.6),rgba(18,12,7,.55)),url(images/hero.jpg) center/cover no-repeat,#2a2018; }
  .hero h1 { letter-spacing:.06em; font-size:clamp(26px,7.6vw,34px); }
  .hero .cta-row { gap:20px; }
}

/* --- 施工事例の拡大＋3D傾き（21章）で追加 --- */
.thumb { display:block; width:100%; padding:0; border:0; background:none; cursor:zoom-in; border-radius:12px; overflow:hidden; aspect-ratio:4/3; }
.thumb img { transition:transform .5s ease; }
.thumb:hover img { transform:scale(1.04); }
.thumb:focus-visible { outline:3px solid var(--accent); outline-offset:3px; }
.lb { position:fixed; inset:0; z-index:100; display:flex; flex-direction:column; align-items:center; justify-content:center; padding:56px 16px 24px; background:rgba(14,10,6,.88); animation:lb-fade .3s ease; }
.lb[hidden] { display:none; }
.lb-stage { display:grid; place-items:center; width:min(960px,100%); max-height:66vh; perspective:1000px; touch-action:none; }
.lb-img { display:block; max-width:100%; max-height:66vh; width:auto; height:auto; border-radius:12px; box-shadow:0 30px 80px rgba(0,0,0,.55); transition:transform .15s ease-out; animation:lb-in .6s cubic-bezier(.2,.7,.2,1); will-change:transform; }
.lb-cap { margin:28px 0 0; color:#fff; letter-spacing:.12em; font-size:14px; }
.lb-close { position:absolute; top:12px; right:16px; width:44px; height:44px; border:0; border-radius:50%; background:rgba(255,255,255,.15); color:#fff; font-size:28px; line-height:1; cursor:pointer; }
.lb-close:hover { background:rgba(255,255,255,.3); }
.lb-close:focus-visible { outline:3px solid #fff; outline-offset:2px; }
@keyframes lb-fade { from { opacity:0; } to { opacity:1; } }
@keyframes lb-in { from { opacity:0; transform:perspective(1000px) rotateY(-32deg) scale(.82); } to { opacity:1; transform:perspective(1000px) rotateY(0) scale(1); } }
@media (prefers-reduced-motion: reduce) { .lb, .lb-img, .thumb img { animation:none; transition:none; } .thumb:hover img { transform:none; } }

/* --- ヒーローの可変3D（22章）で追加 --- */
.hero-gl { position:absolute; inset:0; width:100%; height:100%; display:block; pointer-events:none; z-index:0; }
.hero .wrap { position:relative; z-index:1; }
.hero-hint { position:absolute; right:24px; bottom:24px; z-index:1; margin:0; font-size:12px; letter-spacing:.12em; color:#fff; opacity:.75; pointer-events:none; }
@media (max-width:640px) { .hero-hint { right:16px; left:16px; bottom:104px; text-align:center; } }