/* =============================================================
   株式会社ROOFTEQウエノ  TOPページ  スタイルシート
   設計方針: モバイルファースト / 白・黒・チャコールグレー基調
   ブレイクポイント: 768px(タブレット) / 1024px(PC)
   ============================================================= */

/* ---------- カラー・変数 ---------- */
:root{
  --c-black:   #111111;
  --c-charcoal:#2b2f31;
  --c-gray:    #6b7175;
  --c-line:    #e3e3e1;
  --c-bg:      #ffffff;
  --c-bg-alt:  #f4f4f2;
  --c-white:   #ffffff;

  --font-jp: "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", Meiryo, sans-serif;
  --font-en: "Oswald", "Noto Sans JP", sans-serif;

  --wrap: 1200px;
  --pad: 20px;

  --header-h: 60px;
}

/* ---------- リセット ---------- */
*,*::before,*::after{ box-sizing:border-box; margin:0; padding:0; }
html{ scroll-behavior:smooth; -webkit-text-size-adjust:100%; }
body{
  font-family:var(--font-jp);
  color:var(--c-black);
  background:var(--c-bg);
  line-height:1.9;
  font-size:15px;
  font-weight:400;
  letter-spacing:.02em;
  overflow-x:hidden;
  /* SP固定ボタン分の余白（SPのみ後述で調整） */
}
img{ max-width:100%; height:auto; display:block; }
a{ color:inherit; text-decoration:none; }
ul,ol{ list-style:none; }
h1,h2,h3{ line-height:1.4; font-weight:700; }

/* スクロール時にアンカーがヘッダーに隠れないように */
:target{ scroll-margin-top:var(--header-h); }
section[id]{ scroll-margin-top:var(--header-h); }

.skip-link{
  position:absolute; left:-9999px; top:0; z-index:1000;
  background:var(--c-black); color:#fff; padding:10px 16px;
}
.skip-link:focus{ left:0; }

/* ---------- 共通レイアウト ---------- */
.container{
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:var(--pad);
}
.section{ padding:64px 0; }
.section__header{ margin-bottom:36px; }
.section__label{
  font-family:var(--font-en);
  font-size:13px;
  letter-spacing:.22em;
  color:var(--c-gray);
  margin-bottom:8px;
}
.section__label--light{ color:rgba(255,255,255,.7); }
.section__title{
  font-size:26px;
  letter-spacing:.04em;
}
.section__note{
  margin-top:12px;
  font-size:13px;
  color:var(--c-gray);
}

/* ---------- ボタン ---------- */
.btn{
  display:inline-flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:2px;
  padding:15px 28px;
  font-size:14px;
  font-weight:700;
  letter-spacing:.06em;
  border:1px solid transparent;
  transition:opacity .25s, background-color .25s, color .25s;
  text-align:center;
  min-width:200px;
}
.btn:hover{ opacity:.82; }
.btn--primary{ background:var(--c-black); color:#fff; border-color:var(--c-black); }
.btn--ghost{ background:transparent; color:var(--c-black); border-color:var(--c-black); }
.btn--outline{ background:transparent; color:var(--c-black); border-color:var(--c-line); }
.btn--outline:hover{ background:var(--c-black); color:#fff; border-color:var(--c-black); opacity:1; }
.btn--lg{ padding:18px 34px; min-width:240px; }
.btn--ghost-light{ color:#fff; border-color:rgba(255,255,255,.6); }
.btn__sub{ font-size:11px; font-weight:500; letter-spacing:.1em; opacity:.75; }
.btn__main{ font-family:var(--font-en); font-size:19px; letter-spacing:.04em; }

.link-arrow{
  display:inline-flex; align-items:center; gap:8px;
  font-size:14px; font-weight:700;
  border-bottom:1px solid var(--c-black);
  padding-bottom:3px;
  transition:gap .25s;
}
.link-arrow::after{ content:"→"; }
.link-arrow:hover{ gap:14px; }

/* =============================================================
   HEADER
   ============================================================= */
.header{
  position:fixed; inset:0 0 auto 0;
  height:var(--header-h);
  border-bottom:1px solid var(--c-line);
  z-index:100;
}
/* 背景・ぼかしは疑似要素に持たせる。
   .header自体にbackdrop-filterを付けると、子の position:fixed（.gnav）が
   画面ではなくヘッダー基準になり、SPメニューが閉じずに文字がはみ出すため */
.header::before{
  content:""; position:absolute; inset:0; z-index:-1;
  background:rgba(255,255,255,.94);
  -webkit-backdrop-filter:saturate(180%) blur(6px);
  backdrop-filter:saturate(180%) blur(6px);
}
.header__inner{
  height:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:var(--pad);
  display:flex; align-items:center; justify-content:space-between;
}
.header__logo img{ height:28px; width:auto; }

.gnav{
  position:fixed; inset:var(--header-h) 0 0 0;
  background:var(--c-black);
  transform:translateY(-120%);
  /* 閉じている間は非表示（文字の残り・フォーカス移動を防ぐ）。閉じるアニメーション後に隠す */
  visibility:hidden;
  transition:transform .35s ease, visibility 0s linear .35s;
  padding:32px var(--pad);
  overflow-y:auto;
  overscroll-behavior:contain;
}
.gnav.is-open{
  transform:translateY(0);
  visibility:visible;
  transition:transform .35s ease, visibility 0s;
}
.gnav__list{ display:flex; flex-direction:column; gap:4px; }
.gnav__list a{
  display:block;
  color:#fff;
  font-size:16px;
  padding:16px 4px;
  border-bottom:1px solid rgba(255,255,255,.15);
  letter-spacing:.06em;
}
.gnav__cta{ color:#fff; }

.hamburger{
  width:32px; height:24px; position:relative;
  background:none; border:none; cursor:pointer;
  -webkit-tap-highlight-color:transparent;
}
/* 見た目は変えずにタップ範囲を44×44pxに広げる（iPhone推奨サイズ） */
.hamburger::after{ content:""; position:absolute; inset:-10px -6px; }
/* SPメニュー表示中は背面ページをスクロールさせない */
html.is-menu-open, html.is-menu-open body{ overflow:hidden; }
.hamburger span{
  position:absolute; left:0; width:100%; height:2px;
  background:var(--c-black); transition:transform .3s, opacity .3s, top .3s;
}
.hamburger span:nth-child(1){ top:2px; }
.hamburger span:nth-child(2){ top:11px; }
.hamburger span:nth-child(3){ top:20px; }
.hamburger.is-active span:nth-child(1){ top:11px; transform:rotate(45deg); }
.hamburger.is-active span:nth-child(2){ opacity:0; }
.hamburger.is-active span:nth-child(3){ top:11px; transform:rotate(-45deg); }

/* =============================================================
   1. HERO
   ============================================================= */
.hero{
  position:relative;
  min-height:88vh;
  display:flex;
  align-items:flex-end;
  padding-top:var(--header-h);
  color:#fff;
  overflow:hidden;
}
.hero__media{ position:absolute; inset:0; z-index:-2; }
.hero__img{
  width:100%; height:100%;
  object-fit:cover;
  /* 縦位置：都市の背景と屋根の勾配が両方見えるよう、やや上寄りをトリミング */
  object-position:center 32%;
}
.hero::after{
  content:""; position:absolute; inset:0; z-index:-1;
  background:linear-gradient(180deg, rgba(17,17,17,.15) 0%, rgba(17,17,17,.35) 55%, rgba(17,17,17,.62) 100%);
}
.hero__body{
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding:0 var(--pad) 56px;
}
.hero__copy{
  font-size:34px;
  letter-spacing:.06em;
  margin-bottom:20px;
  text-shadow:0 2px 20px rgba(0,0,0,.35);
}
.hero__lead{
  font-size:14px;
  line-height:2;
  max-width:34em;
  margin-bottom:28px;
}
.hero__actions{ display:flex; flex-direction:column; gap:12px; }
.hero__actions .btn{ width:100%; }

/* =============================================================
   2. ABOUT
   ============================================================= */
.about{ background:var(--c-bg); }
.about__sub{
  font-size:17px; font-weight:700; margin-top:14px; color:var(--c-charcoal);
}
.about__head{ margin-bottom:28px; }
.about__text p{ margin-bottom:18px; }
.about__text strong{ font-weight:700; border-bottom:2px solid var(--c-black); }

/* =============================================================
   3. SERVICE
   ============================================================= */
.service{ background:var(--c-bg-alt); }
.service__list{ display:grid; gap:1px; background:var(--c-line); border:1px solid var(--c-line); }
.service__item{
  background:var(--c-white);
  padding:32px 24px;
  position:relative;
}
.service__num{
  font-family:var(--font-en);
  font-size:13px; color:var(--c-gray); letter-spacing:.15em;
}
.service__icon{ width:52px; height:52px; color:var(--c-charcoal); margin:14px 0 18px; }
.service__icon svg{ width:100%; height:100%; }
.service__name{
  font-size:18px;
  margin-bottom:12px;
  display:flex; flex-direction:column; gap:4px;
}
.service__en{
  font-family:var(--font-en);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--c-gray);
  font-weight:500;
}
.service__desc{ font-size:14px; color:var(--c-charcoal); }

/* =============================================================
   4. WORKS
   ============================================================= */
.works{ background:var(--c-bg); }
.works__grid{ display:grid; gap:28px; }
.work-card__link{ display:block; }
.work-card__figure{ overflow:hidden; background:var(--c-bg-alt); aspect-ratio:4/3; }
.work-card__figure img{ width:100%; height:100%; object-fit:cover; transition:transform .5s ease; }
.work-card__link:hover .work-card__figure img{ transform:scale(1.05); }
.work-card__body{ padding-top:16px; }
.work-card__cat{
  display:inline-block;
  font-size:11px; font-weight:700; letter-spacing:.08em;
  color:#fff; background:var(--c-charcoal);
  padding:4px 10px; margin-bottom:10px;
}
.work-card__title{ font-size:16px; margin-bottom:6px; }
.work-card__place{ font-size:13px; color:var(--c-gray); }
.works__more{ text-align:center; margin-top:40px; }

/* =============================================================
   5. STRENGTH
   ============================================================= */
.strength{ background:var(--c-charcoal); color:#fff; }
.strength .section__label{ color:rgba(255,255,255,.65); }
.strength__list{ display:grid; gap:56px; }
/* 写真：縦長の元写真を横長に切り抜くため、img の object-position(縦%)で見せ場を調整 */
.strength__figure{
  position:relative;
  overflow:hidden;
  aspect-ratio:4/3;
  background:#1f2224;
}
.strength__figure img{ width:100%; height:100%; object-fit:cover; }
.strength__body{ padding-top:24px; }
/* 番号＋細い罫線（図面の寸法線のような水平ライン） */
.strength__num{
  display:flex; align-items:center; gap:16px;
  font-family:var(--font-en); font-size:28px; line-height:1;
  color:rgba(255,255,255,.4); letter-spacing:.05em;
}
.strength__num::after{
  content:""; flex:1; height:1px; background:rgba(255,255,255,.2);
}
.strength__title{ font-size:19px; margin:18px 0 12px; }
.strength__desc{ font-size:14px; color:rgba(255,255,255,.8); }

/* =============================================================
   6. COMPANY
   ============================================================= */
.company{ background:var(--c-bg); }
.company__table{ border-top:1px solid var(--c-line); }
.company__row{
  display:flex; flex-direction:column;
  padding:18px 0;
  border-bottom:1px solid var(--c-line);
}
.company__row dt{
  font-size:13px; font-weight:700; color:var(--c-gray);
  letter-spacing:.08em; margin-bottom:6px;
}
.company__row dd{ font-size:15px; }
.company__more{ margin-top:32px; text-align:center; }

/* =============================================================
   7. CONTACT
   ============================================================= */
.contact{ background:var(--c-black); color:#fff; padding:72px 0; }
.contact__inner{ text-align:center; }
.contact__copy{ font-size:24px; letter-spacing:.04em; margin:14px 0 18px; }
.contact__lead{ font-size:14px; color:rgba(255,255,255,.8); margin-bottom:32px; }
.contact__actions{ display:flex; flex-direction:column; gap:14px; align-items:center; }
.contact__actions .btn{ width:100%; max-width:360px; }
.contact__actions .btn--primary{ background:#fff; color:var(--c-black); border-color:#fff; }
.contact__hours{ margin-top:22px; font-size:12px; color:rgba(255,255,255,.6); letter-spacing:.08em; }

/* =============================================================
   FOOTER
   ============================================================= */
.footer{ background:var(--c-charcoal); color:rgba(255,255,255,.75); padding:48px 0 90px; }
.footer__inner{ display:grid; gap:28px; }
.footer__logo{ height:32px; width:auto; margin-bottom:16px; }
.footer__address{ font-size:13px; line-height:1.9; }
.footer__nav ul{ display:grid; gap:10px; }
.footer__nav a{ font-size:13px; }
.footer__nav a:hover{ color:#fff; }
.footer__copy{
  text-align:center; font-size:11px; letter-spacing:.06em;
  color:rgba(255,255,255,.5); margin-top:36px;
}

/* =============================================================
   スマートフォン固定フッターボタン（SP専用）
   ============================================================= */
.sp-fixed{
  position:fixed; inset:auto 0 0 0; z-index:90;
  display:grid; grid-template-columns:1fr 1fr;
  border-top:1px solid rgba(0,0,0,.1);
}
.sp-fixed__btn{
  display:flex; flex-direction:column; align-items:center; justify-content:center;
  gap:3px; padding:10px 4px;
  font-size:12px; font-weight:700; letter-spacing:.04em;
}
.sp-fixed__btn svg{ width:20px; height:20px; }
.sp-fixed__btn--tel{ background:var(--c-black); color:#fff; }
.sp-fixed__btn--contact{ background:#fff; color:var(--c-black); }
/* SP時、固定ボタンにコンテンツが隠れないよう余白確保 */
body{ padding-bottom:64px; }

/* =============================================================
   タブレット  768px 〜
   ============================================================= */
@media (min-width:768px){
  body{ font-size:16px; padding-bottom:0; }
  .section{ padding:96px 0; }
  .section__title{ font-size:32px; }

  .hero__copy{ font-size:48px; }
  .hero__lead{ font-size:15px; }
  .hero__actions{ flex-direction:row; }
  .hero__actions .btn{ width:auto; }

  .about__grid{ display:grid; grid-template-columns:1fr 1.4fr; gap:48px; align-items:start; }
  .about__head{ margin-bottom:0; }

  .service__list{ grid-template-columns:1fr 1fr; }
  .service__item{ padding:44px 36px; }

  .works__grid{ grid-template-columns:1fr 1fr; gap:32px 28px; }

  /* 写真とテキストを左右交互に配置 */
  .strength__list{ gap:72px; }
  .strength__item{
    display:grid; grid-template-columns:7fr 5fr; gap:40px; align-items:center;
  }
  .strength__item:nth-child(even){ grid-template-columns:5fr 7fr; }
  .strength__item:nth-child(even) .strength__figure{ order:2; }
  .strength__body{ padding-top:0; }

  .company__row{ flex-direction:row; align-items:baseline; padding:22px 0; }
  .company__row dt{ flex:0 0 180px; margin-bottom:0; }

  .contact__copy{ font-size:30px; }
  .contact__actions{ flex-direction:row; justify-content:center; }
  .contact__actions .btn{ width:auto; }

  .footer__inner{ grid-template-columns:1.4fr 1fr; }
  .footer{ padding-bottom:48px; }

  /* SP固定ボタンは非表示 */
  .sp-fixed{ display:none; }

  :root{ --header-h:72px; }
}

/* =============================================================
   PC  1024px 〜
   ============================================================= */
@media (min-width:1024px){
  .header__logo img{ height:32px; }

  /* PCは通常ナビ表示・ハンバーガー非表示 */
  .hamburger{ display:none; }
  .gnav{
    position:static; transform:none; background:none; padding:0;
    inset:auto;
    visibility:visible; transition:none; overflow:visible;
  }
  .gnav__list{ flex-direction:row; align-items:center; gap:4px; }
  .gnav__list a{
    color:var(--c-black);
    font-size:14px;
    padding:10px 16px;
    border-bottom:none;
    letter-spacing:.04em;
    transition:opacity .2s;
  }
  .gnav__list a:hover{ opacity:.55; }
  .gnav__cta{
    background:var(--c-black); color:#fff !important;
    margin-left:8px;
  }
  .gnav__cta:hover{ opacity:.82 !important; }

  .hero{ min-height:92vh; }
  .hero__copy{ font-size:60px; }
  .hero__body{ padding-bottom:80px; }
  /* PCは横長トリミングが強くなるため、屋根の広がりが主に見えるよう再調整 */
  .hero__img{ object-position:center 38%; }

  .service__list{ grid-template-columns:repeat(4,1fr); }
  .works__grid{ grid-template-columns:repeat(3,1fr); }

  .strength__list{ gap:104px; }
  .strength__item{ gap:72px; }
  .strength__body{ max-width:30em; }
  .strength__num{ font-size:44px; gap:24px; }
  .strength__title{ font-size:24px; margin:26px 0 16px; }
  .strength__desc{ font-size:15px; line-height:2.1; }
}

/* =============================================================
   モーション抑制設定
   ============================================================= */
@media (prefers-reduced-motion:reduce){
  *{ animation:none !important; transition:none !important; }
  html{ scroll-behavior:auto; }
}