/* 058 〇〇鋼業 — Steel Structure / Cyan Industrial */
*{margin:0;padding:0;box-sizing:border-box}html,body{overflow-x:hidden}
:root{--bg:#f4f5f7;--bg-2:#e8ebef;--bg-3:#0d1825;--ink:#0d1825;--ink-2:#1a2330;--steel:#3b4d63;--steel-l:#5c7088;--gray:#6b7c91;--gray-l:#a0adb9;--accent:#06b6d4;--accent-d:#0891a8;--rust:#cc6515;--line:rgba(13,24,37,.12);--line-2:rgba(13,24,37,.22)}
body{background:var(--bg);color:var(--ink);font-family:'Archivo','Noto Sans JP',sans-serif;font-size:15px;line-height:1.7;-webkit-font-smoothing:antialiased;font-weight:400}
a{color:inherit;text-decoration:none}img{max-width:100%;display:block}
.container{max-width:1320px;margin:0 auto;padding:0 32px}
.demo-bar{position:fixed;top:0;left:0;right:0;z-index:1000;background:var(--ink);color:var(--bg);text-align:center;padding:9px 16px;font-family:'JetBrains Mono','Archivo',monospace;font-size:11px;letter-spacing:.18em}
.demo-bar a{text-decoration:underline;color:var(--accent);font-weight:700}

/* ===== Header ===== */
header.site-header{position:fixed;top:32px;left:0;right:0;z-index:100;background:rgba(244,245,247,.96);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav-wrap{display:flex;justify-content:space-between;align-items:center;padding:18px 32px;max-width:1600px;margin:0 auto}
.logo{font-family:'Archivo',sans-serif;font-size:22px;font-weight:800;color:var(--ink);letter-spacing:-.01em;display:flex;align-items:center;gap:10px}
.logo::before{content:"";width:14px;height:14px;background:var(--accent);transform:rotate(45deg)}
.logo span{color:var(--accent);font-weight:900}
.nav-list{display:flex;gap:32px;list-style:none}
.nav-list a{font-family:'Archivo',sans-serif;font-size:13px;font-weight:600;color:var(--ink);letter-spacing:.06em;padding:6px 0;position:relative;transition:color .25s;text-transform:uppercase}
.nav-list a:hover{color:var(--accent)}
.nav-cta{padding:11px 22px;background:var(--ink);color:var(--bg);font-family:'Archivo',sans-serif;font-size:12px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;transition:all .25s}
.nav-cta:hover{background:var(--accent);color:var(--ink)}
.mobile-toggle{display:none;background:none;border:none;font-size:24px;cursor:pointer;color:var(--ink)}
@media(max-width:900px){.nav-list,.nav-cta{display:none}.mobile-toggle{display:block}}

/* ===== HERO — Steel Industrial Grid ===== */
.hero{position:relative;min-height:100vh;padding:200px 0 80px;display:flex;align-items:center;overflow:hidden;background:linear-gradient(135deg,rgba(13,24,37,.78) 0%,rgba(13,24,37,.55) 60%,rgba(6,182,212,.18) 100%),url("../images/hero.jpg") center/cover var(--ink-2)}
.hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);background-size:48px 48px;z-index:1;pointer-events:none}
.hero::after{content:"";position:absolute;left:0;top:0;bottom:0;width:6px;background:linear-gradient(180deg,var(--accent) 0%,transparent 100%);z-index:2}
.hero .container{position:relative;z-index:3}
.hero-meta{display:flex;gap:32px;font-family:'JetBrains Mono','Archivo',monospace;font-size:11px;letter-spacing:.18em;color:rgba(255,255,255,.5);margin-bottom:48px;text-transform:uppercase}
.hero-meta b{color:var(--accent);font-weight:700}
.hero h1{font-family:'Archivo',sans-serif;font-size:clamp(56px,11vw,148px);line-height:.95;letter-spacing:-.02em;color:#fff;font-weight:900;margin-bottom:32px;text-shadow:0 4px 32px rgba(0,0,0,.3)}
.hero h1 em{color:var(--accent);font-style:normal;display:inline-block}
.hero h1 .stroke{-webkit-text-stroke:2px #fff;color:transparent;display:inline-block}
.hero h1 .jp{display:block;font-family:'Noto Sans JP',sans-serif;font-size:clamp(18px,2.4vw,32px);font-weight:500;letter-spacing:.04em;color:rgba(255,255,255,.78);margin-top:24px;line-height:1.4}
.hero-lead{font-size:clamp(15px,1.3vw,17px);color:rgba(255,255,255,.78);max-width:620px;margin-bottom:48px;line-height:1.95;text-shadow:0 1px 8px rgba(0,0,0,.3)}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:64px}
.btn{display:inline-flex;align-items:center;gap:10px;padding:16px 32px;font-family:'Archivo',sans-serif;font-size:13px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;transition:all .25s}
.btn-primary{background:var(--accent);color:var(--ink)}
.btn-primary:hover{background:#fff}
.btn-outline{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.3)}
.btn-outline:hover{border-color:#fff;background:rgba(255,255,255,.08)}
.hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:32px;max-width:780px;border-top:1px solid rgba(255,255,255,.18);padding-top:32px}
.hero-stat{color:#fff}
.hero-stat-num{font-family:'Archivo',sans-serif;font-size:clamp(36px,4.5vw,56px);font-weight:900;color:var(--accent);letter-spacing:-.02em;line-height:1}
.hero-stat-label{font-family:'JetBrains Mono','Archivo',monospace;font-size:11px;letter-spacing:.18em;color:rgba(255,255,255,.55);margin-top:10px;text-transform:uppercase}

/* ===== Section Common ===== */
.sec-tag{display:inline-block;font-family:'JetBrains Mono','Archivo',monospace;font-size:11px;letter-spacing:.32em;color:var(--accent);text-transform:uppercase;margin-bottom:16px;font-weight:600}
.sec-title{font-family:'Archivo',sans-serif;font-size:clamp(36px,5.5vw,72px);line-height:1.05;color:var(--ink);font-weight:900;letter-spacing:-.015em;margin-bottom:24px}
.sec-title em{color:var(--accent);font-style:normal}
.sec-title .jp{display:block;font-family:'Noto Sans JP',sans-serif;font-size:clamp(14px,1.6vw,20px);font-weight:500;letter-spacing:.04em;color:var(--gray);margin-top:14px;line-height:1.5}
.sec-lead{color:var(--gray);font-size:15px;line-height:1.95;max-width:680px}
.sec-header{margin-bottom:64px}

/* ===== ABOUT ===== */
.about-section{padding:120px 0;background:var(--bg)}
.about-grid{display:grid;grid-template-columns:1fr 1.3fr;gap:64px;align-items:center}
.about-visual{aspect-ratio:4/5;background:url("../images/about.jpg") center/cover;position:relative;border:8px solid var(--ink)}
.about-visual::before{content:"";position:absolute;inset:-8px;border:1px solid var(--accent);transform:translate(20px,20px);z-index:-1}
.about-text p{margin-bottom:18px;color:var(--steel);font-size:15.5px;line-height:1.95}
.about-data{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:40px;padding-top:40px;border-top:1px solid var(--line)}
.about-data-item{text-align:left}
.about-data-num{font-family:'Archivo',sans-serif;font-size:48px;font-weight:900;color:var(--ink);letter-spacing:-.02em;line-height:1}
.about-data-num em{font-size:18px;color:var(--accent);font-style:normal;margin-left:4px}
.about-data-label{font-family:'JetBrains Mono','Archivo',monospace;font-size:11px;letter-spacing:.18em;color:var(--gray);margin-top:8px;text-transform:uppercase}

/* ===== SERVICE ===== */
.service-section{padding:120px 0;background:var(--ink);color:#fff}
.service-section .sec-title{color:#fff}
.service-section .sec-tag{color:var(--accent)}
.service-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px;margin-top:48px}
.service-card{padding:40px 32px;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.1);transition:all .35s}
.service-card:hover{background:rgba(6,182,212,.08);border-color:var(--accent);transform:translateY(-6px)}
.service-card .num{font-family:'JetBrains Mono','Archivo',monospace;font-size:13px;letter-spacing:.18em;color:var(--accent);margin-bottom:24px;font-weight:600}
.service-card h3{font-family:'Archivo',sans-serif;font-size:24px;color:#fff;margin-bottom:14px;font-weight:800;letter-spacing:-.01em}
.service-card h3 .jp{display:block;font-family:'Noto Sans JP',sans-serif;font-size:13px;font-weight:500;color:rgba(255,255,255,.55);margin-top:6px}
.service-card p{color:rgba(255,255,255,.65);font-size:14px;line-height:1.85}

/* ===== WORKS ===== */
.works-section{padding:120px 0;background:var(--bg-2)}
.works-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:32px}
.works-item{background:var(--bg);overflow:hidden;border:1px solid var(--line);transition:all .3s}
.works-item:hover{border-color:var(--accent);transform:translateY(-4px)}
.works-img{aspect-ratio:16/10;background-size:cover;background-position:center;border-bottom:3px solid var(--accent)}
.works-info{padding:24px 28px}
.works-info .meta{font-family:'JetBrains Mono','Archivo',monospace;font-size:11px;letter-spacing:.18em;color:var(--accent);margin-bottom:12px;font-weight:600;text-transform:uppercase}
.works-info h4{font-family:'Archivo',sans-serif;font-size:19px;color:var(--ink);font-weight:800;margin-bottom:10px;line-height:1.35}
.works-info p{font-size:13.5px;color:var(--gray);line-height:1.85}

/* ===== PROCESS ===== */
.process-section{padding:120px 0;background:var(--bg)}
.process-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:24px;margin-top:48px}
.process-step{position:relative;padding:32px 28px;background:var(--bg-2);border-left:3px solid var(--accent)}
.process-step .num{font-family:'Archivo',sans-serif;font-size:42px;font-weight:900;color:var(--accent);line-height:1;margin-bottom:18px;letter-spacing:-.02em}
.process-step h4{font-family:'Archivo',sans-serif;font-size:18px;color:var(--ink);margin-bottom:10px;font-weight:800}
.process-step p{font-size:13.5px;color:var(--gray);line-height:1.85}

/* ===== NEWS ===== */
.news-section{padding:120px 0;background:var(--bg-2)}
.news-list{max-width:880px;margin:48px auto 0;display:flex;flex-direction:column;gap:0}
.news-item{display:grid;grid-template-columns:130px 110px 1fr;gap:20px;padding:24px 0;border-bottom:1px solid var(--line);align-items:center;transition:all .25s}
.news-item:hover{padding-left:12px;border-bottom-color:var(--accent)}
.news-date{font-family:'JetBrains Mono','Archivo',monospace;font-size:13px;color:var(--gray);letter-spacing:.05em}
.news-cat{font-family:'Archivo',sans-serif;font-size:10px;font-weight:700;letter-spacing:.2em;background:var(--ink);color:var(--accent);padding:5px 10px;text-align:center;text-transform:uppercase}
.news-title{font-size:14.5px;color:var(--ink);font-weight:600}

/* ===== CTA ===== */
.cta-block{padding:120px 0;background:linear-gradient(135deg,var(--ink) 0%,var(--ink-2) 100%);color:#fff;text-align:center;position:relative;overflow:hidden}
.cta-block::before{content:"";position:absolute;inset:0;background:url("../images/hero.jpg") center/cover;opacity:.08;mix-blend-mode:lighten}
.cta-block .container{position:relative;z-index:1}
.cta-block h2{font-family:'Archivo',sans-serif;font-size:clamp(36px,5.5vw,68px);font-weight:900;line-height:1.05;margin-bottom:24px;letter-spacing:-.02em}
.cta-block h2 em{color:var(--accent);font-style:normal}
.cta-block p{color:rgba(255,255,255,.7);font-size:15.5px;line-height:1.95;margin-bottom:40px}
.cta-block .btn{padding:18px 40px;font-size:14px}

/* ===== FOOTER ===== */
.site-footer{background:var(--ink);color:rgba(255,255,255,.6);padding:80px 0 32px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:48px;margin-bottom:48px}
.footer-brand .logo{color:#fff;margin-bottom:18px}
.footer-brand p{font-size:13.5px;line-height:1.85}
.footer-col h5{font-family:'Archivo',sans-serif;font-size:11px;letter-spacing:.32em;color:var(--accent);text-transform:uppercase;margin-bottom:18px;font-weight:700}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:10px}
.footer-col a{font-size:13.5px;color:rgba(255,255,255,.6);transition:color .25s}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{padding-top:24px;border-top:1px solid rgba(255,255,255,.1);text-align:center;font-size:12px;color:rgba(255,255,255,.4);letter-spacing:.08em;font-family:'JetBrains Mono','Archivo',monospace}

/* ===== Page Hero (sub-pages) ===== */
.page-hero{padding:200px 0 80px;text-align:center;background:linear-gradient(180deg,var(--ink) 0%,var(--ink-2) 100%);color:#fff;position:relative;overflow:hidden}
.page-hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);background-size:48px 48px;pointer-events:none}
.page-hero .container{position:relative;z-index:1}
.page-hero h1{font-family:'Archivo',sans-serif;font-size:clamp(40px,6.5vw,80px);color:#fff;font-weight:900;letter-spacing:-.02em}
.page-hero .breadcrumb{font-family:'JetBrains Mono','Archivo',monospace;font-size:11px;color:var(--accent);letter-spacing:.4em;margin-bottom:18px;text-transform:uppercase}

/* ===== Reveal Animation ===== */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .8s ease,transform .8s ease}
.reveal.show{opacity:1;transform:none}

/* ===== Responsive ===== */
@media(max-width:900px){
  .about-grid,.footer-grid{grid-template-columns:1fr;gap:48px}
  .hero-stats{grid-template-columns:repeat(2,1fr);gap:24px}
  .news-item{grid-template-columns:1fr;gap:6px;padding:18px 0}
  .news-cat{justify-self:start}
}


/* === Hamburger Menu Active State (透け防止 - Audit fix) === */
@media(max-width:900px){
  header.site-header.menu-active,
  .site-header.menu-active{
    background:rgba(244,245,247,1) !important;
    backdrop-filter:none !important;
    -webkit-backdrop-filter:none !important;
  }
}

/* ====================================================
   Visual safety override (2026-05-04 一括強制表示化)
   feedback_pre_upload_visual_check ルール準拠
   JS未発火時/画像非表示を防ぐため、すべての
   reveal系クラスを初期表示OKに強制
==================================================== */
.reveal, .reveal-up, .reveal-fade, .reveal-clip, .reveal-noren,
.scrub-item, .reveal-left, .reveal-right { 
  opacity: 1 !important; 
  transform: none !important; 
  clip-path: inset(0 0 0% 0) !important;
  -webkit-clip-path: inset(0 0 0% 0) !important;
}



/* ====================================================
   スマホ時 contact フォーム強制1カラム化（2026-05-05）
   2カラム表示で入力欄が狭くなる問題
==================================================== */
@media (max-width: 767px) {
    .form-row,
    .form-grid,
    .form-2col,
    .form-pair,
    .input-row,
    .input-grid,
    [class*="form-row"],
    [class*="form-grid"],
    [class*="two-col"] {
        display: block !important;
        grid-template-columns: 1fr !important;
    }
    form input[type="text"],
    form input[type="email"],
    form input[type="tel"],
    form input[type="number"],
    form textarea,
    form select,
    .form-row > input,
    .form-row > textarea,
    .form-row > select,
    .form-row > div,
    .form-grid > * {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box;
    }
    .form-row, .form-grid {
        margin-bottom: 1rem;
    }
}



/* ====================================================
   contact 1カラム化 強化版（2026-05-05・全クラス網羅）
==================================================== */
@media (max-width: 767px) {
    .contact-grid,
    .contact-form,
    .ct-grid,
    .ct-form,
    .booking-form,
    .reserve-form,
    .form-card,
    .form-wrap,
    .form-box,
    [class*="contact-grid"],
    [class*="contact-form"],
    [class*="ct-grid"],
    [class*="ct-form"] {
        display: block !important;
        grid-template-columns: 1fr !important;
    }
    .contact-grid > *,
    .contact-form > *,
    .ct-grid > *,
    .ct-form > *,
    .booking-form > *,
    .reserve-form > *,
    .form-card > *,
    .form-wrap > *,
    .form-box > * {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box;
    }
    .ct-budget-grid,
    .ct-field {
        grid-template-columns: 1fr !important;
        display: block !important;
    }
}

/* ====================================================
   横スクロール防止（2026-05-14 一括追加）
   CLAUDE.md ルール「html/body 両方に overflow-x:hidden」準拠
==================================================== */
html { overflow-x: hidden; }
body { overflow-x: hidden; }

/* ====================================================
   ハンバーガーメニュー全画面オーバーレイ化（2026-05-14）
   CLAUDE.md ルール準拠: position:fixed; inset:0; 不透明背景
==================================================== */
@media (max-width: 900px) {
  .mobile-toggle {
    z-index: 1100 !important;
    position: relative !important;
  }
  .nav-list {
    position: fixed !important;
    inset: 0 !important;
    width: 100vw !important;
    height: 100vh !important;
    background: rgba(10,10,10,0.98) !important;
    -webkit-backdrop-filter: none !important;
    backdrop-filter: none !important;
    display: flex !important;
    flex-direction: column !important;
    justify-content: center !important;
    align-items: center !important;
    gap: 28px !important;
    padding: 80px 24px 40px !important;
    margin: 0 !important;
    z-index: 1000 !important;
    transform: translateX(100%);
    transition: transform .35s cubic-bezier(.4,0,.2,1), opacity .25s;
    opacity: 0;
    pointer-events: none;
    list-style: none;
    overflow-y: auto;
  }
  .nav-list.is-open {
    transform: translateX(0) !important;
    opacity: 1 !important;
    pointer-events: auto !important;
  }
  .nav-list a,
  .nav-list li,
  .nav-list li a {
    color: #fff !important;
    font-size: 20px !important;
    letter-spacing: 0.1em !important;
    text-decoration: none !important;
    padding: 8px 16px !important;
    display: block !important;
  }
  .nav-list li {
    list-style: none !important;
  }
  header.site-header.menu-active,
  .site-header.menu-active {
    background: rgba(10,10,10,0.98) !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
  }
}

/* ====================================================
   2カラム→1カラム化 B案（2026-05-15）
   左画像・右文章になりがちなキーワード対象
==================================================== */
@media (max-width: 768px) {
  .about-grid { grid-template-columns: 1fr !important; gap: 28px !important; }
}

/* ====================================================
   多カラムgrid スマホ最適化（2026-05-15 千尋）
==================================================== */
@media (max-width: 768px) {
  /* 2カラム化（情報密度を保つ） */
  .hero-stats { grid-template-columns: repeat(2, 1fr) !important; gap: 18px !important; }
  .about-data { grid-template-columns: repeat(2, 1fr) !important; gap: 18px !important; }
}

/* ====================================================
   process-grid（4STEPS）スマホ1カラム化（2026-05-16 一括追加）
==================================================== */
@media(max-width:640px){
  .process-grid{grid-template-columns:1fr !important;margin-top:32px}
  .process-step{padding:26px 20px;border-right:none !important;border-bottom:1px solid currentColor !important}
  .process-step:nth-child(2){border-right:none !important;border-bottom:1px solid currentColor !important}
  .process-step:last-child{border-bottom:none !important}
  .process-step .step-num{margin-bottom:14px}
  .process-step h4{font-size:22px;margin-bottom:10px}
  .process-step p{font-size:13px;line-height:1.78}
}