/* SONOBE（外構の相談窓口）LP 専用 — /sonobe/
   色はすべて common.css の正本トークンを使う（CLAUDE.md §1。hexは書かない）
   書体は --font-serif（見出し）と --font-main（本文）だけ（§2） */

.sb{ background:var(--surface); color:var(--ink-700); }
.sb .mincho{ font-family:var(--font-serif); }
.sb-wrap{ width:min(92%,1040px); margin:0 auto; }
.sb-narrow{ width:min(92%,760px); margin:0 auto; }
.sb-sec{ padding:96px 0; }
.sb-sec--deep{ background:var(--paper); }

.sb-head{ text-align:center; margin-bottom:var(--space-xl); }
.sb-en{ display:block; font-size:11px; font-weight:500; letter-spacing:.24em; color:var(--accent-strong); margin-bottom:10px; }
.sb-title{ font-family:var(--font-serif); font-weight:500; font-size:clamp(22px,3vw,26px); line-height:1.55; letter-spacing:.04em; color:var(--ink-900); margin:0; }
.sb-head p{ margin:18px auto 0; max-width:34em; font-size:var(--fs-s); line-height:1.9; }

/* ---- ボタン（サイトの mid-cta と同じ考え方：墨の地。押す場所を1つに絞る） ---- */
.sb-btn{
  display:inline-flex; align-items:center; justify-content:center; gap:16px;
  min-height:56px; padding:0 40px; border:1px solid var(--ink-900);
  background:var(--ink-900); color:var(--surface);
  font-size:var(--fs-s); font-weight:500; letter-spacing:.14em; text-decoration:none;
  transition:background .2s ease, color .2s ease;
}
.sb-btn:hover{ background:var(--surface); color:var(--ink-900); }
.sb-btn-note{ display:block; margin-top:12px; font-size:var(--fs-xs); color:var(--ink-500); letter-spacing:.06em; }
.sb-link{ display:inline-block; font-size:13px; font-weight:500; letter-spacing:.08em; color:var(--ink-900); text-decoration:none; border-bottom:1px solid var(--ink-900); padding-bottom:3px; }
.sb-link::after{ content:" →"; font-weight:400; }

/* ---- 1画面目（明るい紙の地。不安層に黒いヒーローは使わない §5-7） ---- */
.sb-hero{ background:var(--paper); }
.sb-hero-in{ display:grid; grid-template-columns:1fr 1.15fr; min-height:540px; }
.sb-hero-txt{ display:flex; flex-direction:column; justify-content:center; padding:56px 48px 56px max(4vw,calc((100vw - 1040px)/2)); }
.sb-kicker{ font-size:11px; letter-spacing:.18em; color:var(--ink-500); margin:0 0 18px; }
.sb-hero h1{ font-family:var(--font-serif); font-weight:400; font-size:clamp(27px,3.4vw,40px); line-height:1.5; letter-spacing:.08em; color:var(--ink-900); margin:0; }
.sb-nw{ white-space:nowrap; }
.sb-lead{ margin:24px 0 26px; font-size:15px; line-height:1.9; max-width:26em; }
.sb-marks{ display:flex; flex-wrap:wrap; gap:6px 22px; margin:0 0 28px; padding:0; list-style:none; font-size:13px; }
.sb-marks li::before{ content:""; display:inline-block; width:5px; height:5px; border-radius:50%; background:var(--accent-strong); margin:0 8px 2px 0; vertical-align:middle; }
.sb-hero-ph{ overflow:hidden; }
.sb-hero-ph img{ display:block; width:100%; height:100%; object-fit:cover; }

/* ---- よくあるお悩み（トップの CONCERN と同じ番号つき一覧） ---- */
.sb-nlist{ list-style:none; margin:0; padding:0; border-top:1px solid var(--line); }
.sb-nlist li{ display:flex; gap:28px; align-items:baseline; padding:20px 8px; border-bottom:1px solid var(--line); font-size:var(--fs-m); color:var(--ink-900); }
.sb-n{ flex:none; width:22px; font-size:var(--fs-xs); letter-spacing:.08em; color:var(--accent-strong); }
.sb-after{ text-align:center; margin:36px 0 0; font-size:var(--fs-s); }

/* ---- できること（写真と文の交互。カードのグリッドにしない §5-1） ---- */
.sb-row{ display:grid; grid-template-columns:1fr 1.25fr; gap:48px; align-items:center; padding:36px 0; border-bottom:1px solid var(--line); }
.sb-row:first-of-type{ padding-top:0; }
.sb-row:last-of-type{ border-bottom:0; }
.sb-row--rev .sb-ph{ order:2; }
.sb-ph img{ display:block; width:100%; aspect-ratio:4/3; object-fit:cover; }
.sb-row h3, .sb-flow h3, .sb-shop h3{ font-family:var(--font-serif); font-weight:400; color:var(--ink-900); letter-spacing:.04em; margin:0; }
.sb-row h3{ font-size:22px; margin:4px 0 14px; }
.sb-row p{ margin:0; font-size:var(--fs-s); line-height:1.9; }

/* ---- 流れ ---- */
.sb-flow{ display:grid; grid-template-columns:repeat(3,1fr); margin:0; padding:0; list-style:none; border-top:1px solid var(--line); border-bottom:1px solid var(--line); }
.sb-flow li{ padding:30px 28px; border-right:1px solid var(--line); }
.sb-flow li:last-child{ border-right:0; }
.sb-st{ font-size:11px; letter-spacing:.24em; color:var(--accent-strong); }
.sb-flow h3{ font-size:19px; margin:6px 0 10px; }
.sb-flow p{ margin:0; font-size:var(--fs-s); line-height:1.85; }
.sb-note{ margin:36px auto 0; max-width:680px; padding:20px 24px; background:var(--paper); font-size:13px; line-height:1.9; }
.sb-note b{ color:var(--ink-900); font-weight:600; }

/* ---- 店舗 ---- */
.sb-shop{ display:grid; grid-template-columns:1.2fr 1fr; gap:48px; align-items:center; }
.sb-shop-ph{ display:grid; grid-template-columns:2fr 1fr; grid-template-rows:1fr 1fr; gap:8px; height:360px; }
.sb-shop-ph img{ display:block; width:100%; height:100%; object-fit:cover; }
.sb-shop-ph img:first-child{ grid-row:1 / 3; }
.sb-shop h3{ font-size:22px; margin-bottom:16px; }
.sb-shop p{ margin:0 0 18px; font-size:var(--fs-s); line-height:1.9; }
.sb-shop dl{ display:grid; grid-template-columns:auto 1fr; gap:10px 18px; margin:0 0 24px; font-size:var(--fs-s); }
.sb-shop dt{ color:var(--ink-500); }
.sb-shop dd{ margin:0; line-height:1.8; }
.sb-shop dt{ white-space:nowrap; line-height:1.8; }

/* ---- 施工事例 ---- */
.sb-works{ display:grid; grid-template-columns:repeat(4,1fr); gap:8px; }
.sb-works img{ display:block; width:100%; aspect-ratio:1/1; object-fit:cover; }
.sb-more{ text-align:center; margin:32px 0 0; }

/* ---- よくあるご質問 ---- */
.sb-faq details{ border-bottom:1px solid var(--line); }
.sb-faq details:first-child{ border-top:1px solid var(--line); }
.sb-faq summary{ list-style:none; cursor:pointer; position:relative; padding:20px 44px 20px 8px; font-weight:500; line-height:1.7; color:var(--ink-900); }
.sb-faq summary::-webkit-details-marker{ display:none; }
.sb-faq summary::before{ content:"Q."; font-family:var(--font-serif); color:var(--accent-strong); margin-right:12px; }
.sb-faq summary::after{ content:""; position:absolute; right:12px; top:50%; width:9px; height:9px; border-right:1px solid var(--ink-900); border-bottom:1px solid var(--ink-900); transform:translateY(-70%) rotate(45deg); transition:transform .2s; }
.sb-faq details[open] summary::after{ transform:translateY(-30%) rotate(-135deg); }
.sb-faq details p{ margin:0; padding:0 8px 22px 38px; font-size:var(--fs-s); line-height:1.9; }

/* ---- 最後 ---- */
.sb-final{ text-align:center; }
.sb-final .sb-title{ font-size:clamp(22px,3.4vw,30px); }
.sb-final > .sb-wrap > p{ margin:18px auto 32px; font-size:var(--fs-s); }
.sb-contact{ display:grid; grid-template-columns:repeat(3,1fr); max-width:760px; margin:44px auto 0; border-top:1px solid var(--line); border-bottom:1px solid var(--line); }
.sb-contact a{ display:block; padding:20px 12px; border-right:1px solid var(--line); font-size:13px; color:var(--ink-500); text-decoration:none; }
.sb-contact a:last-child{ border-right:0; }
.sb-contact b{ display:block; font-size:15px; font-weight:500; letter-spacing:.06em; color:var(--ink-900); }

/* ---- スマホで下に残る呼びかけ ---- */
.sb-dock{ position:fixed; left:0; right:0; bottom:0; z-index:40; display:none; padding:10px 16px calc(10px + env(safe-area-inset-bottom));
  background:var(--surface); border-top:1px solid var(--line); transform:translateY(110%); transition:transform .25s ease; }
.sb-dock.is-show{ transform:none; }
.sb-dock .sb-btn{ width:100%; min-height:52px; }

/* 子要素の最小幅で枠を押し広げない（スマホの横スクロール対策） */
.sb-hero-in > *, .sb-row > *, .sb-shop > *, .sb-shop dd{ min-width:0; }
.sb-shop dd{ overflow-wrap:anywhere; }

@media (max-width:900px){
  .sb-hero-in{ grid-template-columns:minmax(0,1fr); min-height:0; }
  .sb-hero-ph{ order:-1; height:260px; }
  .sb-hero-txt{ padding:36px 4vw 48px; }
  .sb-row, .sb-row--rev{ grid-template-columns:minmax(0,1fr); gap:20px; }
  .sb-row--rev .sb-ph{ order:0; }
  .sb-flow{ grid-template-columns:1fr; }
  .sb-flow li{ border-right:0; border-bottom:1px solid var(--line); }
  .sb-flow li:last-child{ border-bottom:0; }
  .sb-shop{ grid-template-columns:minmax(0,1fr); gap:28px; }
  .sb-works{ grid-template-columns:repeat(2,1fr); }
}
@media (max-width:640px){
  .sb-sec{ padding:64px 0; }
  .sb-hero-ph{ height:200px; }
  .sb-hero-txt{ padding:26px 20px 40px; }
  .sb-kicker{ margin-bottom:12px; }
  .sb-hero h1{ font-size:27px; }
  .sb-lead{ margin:14px 0 18px; font-size:var(--fs-s); line-height:1.85; }
  .sb-marks{ margin-bottom:20px; }
  .sb-hero .sb-btn, .sb-final .sb-btn{ width:100%; }
  .sb-nlist li{ gap:16px; font-size:15px; }
  .sb-shop-ph{ height:240px; }
  .sb-contact{ grid-template-columns:1fr; }
  .sb-contact a{ border-right:0; border-bottom:1px solid var(--line); }
  .sb-contact a:last-child{ border-bottom:0; }
  .sb-dock{ display:block; }
}
@media (prefers-reduced-motion:reduce){
  .sb-btn, .sb-dock, .sb-faq summary::after{ transition:none; }
}