/* ===================================================================
   三央工業株式会社 — Web Renewal Demo by isomeya
   配色：銅×黒×アンバー（ロー付の熱・接合・職人）
   =================================================================== */

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

:root{
  --copper:#a85e2d;        /* 銅色 */
  --copper-dark:#7a4321;
  --copper-soft:#fbf0e6;
  --amber:#d4a534;         /* ロー材ゴールド */
  --amber-dark:#a37b1d;
  --ink:#1a1410;           /* 暗茶 */
  --ink-2:#3b2e23;
  --paper:#fdfbf7;
  --paper-2:#f5efe5;
  --line:#e0d6c8;
  --mute:#6b5a4d;
  --bg:#ffffff;
}

html{scroll-behavior:smooth;background:var(--bg);}
body{
  font-family:'Noto Sans JP',sans-serif;
  background:var(--bg);
  color:var(--ink);
  line-height:1.75;
  font-size:15px;
  -webkit-font-smoothing:antialiased;
}
.mono{font-family:'JetBrains Mono','Roboto Mono',monospace;font-feature-settings:'tnum';letter-spacing:0.02em;}
img{display:block;max-width:100%;}
a{color:inherit;}

/* ===== Demo banner ===== */
.demo-tag{
  position:fixed;top:0;left:0;right:0;background:var(--ink);color:#fff;
  text-align:center;padding:8px 12px;font-size:0.7rem;letter-spacing:0.05em;z-index:200;
}

/* ===== Header ===== */
header{
  position:fixed;top:36px;left:0;right:0;
  background:rgba(255,255,255,0.97);backdrop-filter:blur(12px);
  z-index:100;height:74px;display:flex;align-items:center;
  justify-content:space-between;padding:0 48px;
  border-bottom:1px solid var(--line);
}
.logo{display:flex;align-items:center;gap:14px;color:var(--ink);text-decoration:none;}
.logo-mark{
  width:48px;height:48px;
  background:linear-gradient(135deg,var(--copper) 0%,var(--copper-dark) 100%);
  color:var(--amber);
  border-radius:8px;
  display:grid;place-items:center;
  font-family:'Noto Serif JP',serif;font-weight:700;font-size:1.5rem;
  box-shadow:0 4px 14px rgba(168,94,45,0.3);
}
.logo-text{display:flex;flex-direction:column;line-height:1.15;}
.logo-text strong{font-size:0.95rem;font-weight:700;letter-spacing:0.02em;}
.logo-text small{font-family:'JetBrains Mono',monospace;font-size:0.6rem;color:var(--mute);letter-spacing:0.18em;margin-top:3px;}
nav{display:flex;align-items:center;gap:4px;}
nav a{
  color:var(--ink-2);text-decoration:none;
  font-size:0.82rem;padding:9px 14px;
  font-family:'JetBrains Mono',monospace;letter-spacing:0.05em;
  text-transform:uppercase;position:relative;
}
nav a:hover{color:var(--copper);}
nav a.current{color:var(--copper);}
nav a.current::after{content:'';position:absolute;left:14px;right:14px;bottom:4px;height:2px;background:var(--amber);}
.nav-cta{
  background:var(--copper)!important;color:#fff!important;
  font-weight:700!important;padding:11px 22px!important;border-radius:6px;
  letter-spacing:0.08em!important;
}
.nav-cta:hover{background:var(--copper-dark)!important;}

/* ===== Hero ===== */
.hero{
  padding:140px 48px 80px;
  background:linear-gradient(180deg,var(--paper) 0%,var(--bg) 100%);
  position:relative;overflow:hidden;
}
.hero::before{
  content:'BRAZING';position:absolute;top:160px;left:60%;
  font-family:'Noto Serif JP',serif;font-size:18rem;color:rgba(168,94,45,0.04);
  font-weight:900;letter-spacing:-0.04em;line-height:1;pointer-events:none;
}
.hero-inner{
  max-width:1300px;margin:0 auto;
  display:grid;grid-template-columns:1.2fr 1fr;gap:64px;align-items:center;
  position:relative;z-index:1;
}
.hero-tag{
  display:inline-flex;align-items:center;gap:10px;
  background:var(--copper-soft);color:var(--copper-dark);
  border:1px solid var(--copper);
  font-family:'JetBrains Mono',monospace;font-size:0.7rem;letter-spacing:0.2em;
  padding:8px 16px;border-radius:30px;font-weight:700;text-transform:uppercase;
  margin-bottom:28px;
}
.hero-tag::before{content:'';width:8px;height:8px;background:var(--amber);border-radius:50%;}
.hero h1{
  font-family:'Noto Serif JP',serif;
  font-size:clamp(2.8rem,5vw,4.4rem);font-weight:700;
  line-height:1.3;letter-spacing:-0.02em;color:var(--ink);
  margin-bottom:32px;
}
.hero h1 em{font-style:normal;color:var(--copper);position:relative;}
.hero h1 .gold{color:var(--amber);}
.hero h1 .underline{background:linear-gradient(transparent 65%,rgba(212,165,52,0.4) 65%);padding:0 6px;}
.hero-lead{color:var(--ink-2);font-size:1.05rem;line-height:2.0;margin-bottom:36px;max-width:560px;}
.hero-stats{
  display:grid;grid-template-columns:repeat(3,1fr);gap:0;
  background:var(--paper);border:1.5px solid var(--line);
  border-radius:16px;overflow:hidden;
  max-width:560px;margin-bottom:36px;
}
.hero-stats > div{padding:20px 18px;text-align:center;border-right:1px solid var(--line);}
.hero-stats > div:last-child{border-right:none;}
.hero-stats strong{
  display:block;font-family:'Noto Serif JP',serif;
  font-size:2rem;font-weight:700;color:var(--copper);line-height:1;
}
.hero-stats strong small{font-size:0.75rem;color:var(--mute);margin-left:3px;font-family:'Noto Sans JP';}
.hero-stats span{display:block;font-size:0.72rem;color:var(--mute);margin-top:8px;font-weight:600;}

.hero-btns{display:flex;gap:14px;flex-wrap:wrap;}
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:16px 30px;font-weight:700;font-size:0.92rem;
  text-decoration:none;border-radius:6px;transition:all 0.2s;letter-spacing:0.03em;
}
.btn-primary{background:var(--ink);color:#fff;border:2px solid var(--ink);}
.btn-primary:hover{background:var(--copper-dark);border-color:var(--copper-dark);transform:translateY(-2px);}
.btn-out{background:transparent;color:var(--ink);border:2px solid var(--ink);}
.btn-out:hover{background:var(--ink);color:#fff;}

/* Hero visual */
.hero-visual{position:relative;}
.hero-photo{
  aspect-ratio:4/5;border-radius:18px;overflow:hidden;
  box-shadow:0 24px 64px rgba(168,94,45,0.25);
  position:relative;
}
.hero-photo img{width:100%;height:100%;object-fit:cover;filter:brightness(0.95) contrast(1.05);}
.hero-photo::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(180deg,transparent 50%,rgba(26,20,16,0.6) 100%);
}
.hero-badge{
  position:absolute;bottom:-20px;left:-30px;
  background:var(--amber);color:var(--ink);
  padding:18px 26px;border-radius:14px;
  box-shadow:0 14px 36px rgba(212,165,52,0.4);
  transform:rotate(-3deg);font-weight:900;text-align:center;
}
.hero-badge strong{display:block;font-family:'Noto Serif JP',serif;font-size:2.5rem;line-height:1;}
.hero-badge span{display:block;font-size:0.65rem;letter-spacing:0.1em;margin-top:4px;}

/* ===== Section common ===== */
.section{padding:120px 48px;}
.section-inner{max-width:1300px;margin:0 auto;}
.section-eyebrow{
  display:inline-block;
  font-family:'JetBrains Mono',monospace;color:var(--copper);
  font-size:0.72rem;letter-spacing:0.25em;font-weight:700;
  padding:6px 14px;background:var(--copper-soft);border-radius:30px;
  margin-bottom:18px;text-transform:uppercase;
}
.section h2{
  font-family:'Noto Serif JP',serif;
  font-size:clamp(2rem,3.2vw,2.8rem);font-weight:700;
  line-height:1.4;color:var(--ink);margin-bottom:18px;letter-spacing:-0.01em;
}
.section h2 em{font-style:normal;color:var(--copper);}
.section-lead{color:var(--ink-2);font-size:1rem;line-height:2;max-width:680px;margin-bottom:56px;}

/* ===== 取扱材料×製品テーブル ===== */
.materials-section{background:var(--paper);}
.mat-table-wrap{
  background:#fff;border:1px solid var(--line);border-radius:18px;
  overflow:hidden;margin-top:48px;
  box-shadow:0 12px 36px rgba(168,94,45,0.06);
}
.mat-table{width:100%;border-collapse:collapse;}
.mat-table thead th{
  background:var(--ink);color:#fff;
  padding:18px 24px;text-align:left;
  font-family:'JetBrains Mono',monospace;font-size:0.72rem;letter-spacing:0.18em;
  text-transform:uppercase;font-weight:700;
}
.mat-table tbody tr{border-bottom:1px solid var(--line);transition:background 0.2s;}
.mat-table tbody tr:last-child{border-bottom:none;}
.mat-table tbody tr:hover{background:var(--copper-soft);}
.mat-table td{padding:22px 24px;font-size:0.95rem;color:var(--ink-2);}
.mat-table td:first-child{
  font-weight:700;color:var(--copper-dark);
  font-family:'Noto Serif JP',serif;font-size:1.1rem;width:25%;
}
.mat-table td:nth-child(2){width:30%;}
.mat-table td:last-child{font-size:0.85rem;color:var(--mute);}

/* ===== サイズ範囲 ===== */
.range-section{background:var(--ink);color:#fff;text-align:center;}
.range-section .section-eyebrow{background:rgba(212,165,52,0.15);color:var(--amber);}
.range-section h2{color:#fff;}
.range-section h2 em{color:var(--amber);}
.range-section .section-lead{color:rgba(255,255,255,0.85);margin:0 auto 56px;}
.range-vis{
  display:flex;align-items:center;justify-content:center;gap:48px;
  margin-top:48px;flex-wrap:wrap;
}
.range-end{text-align:center;}
.range-end strong{
  display:block;font-family:'Noto Serif JP',serif;font-size:5rem;font-weight:700;
  color:var(--amber);line-height:1;letter-spacing:-0.02em;
}
.range-end span{display:block;font-size:0.85rem;color:rgba(255,255,255,0.7);margin-top:14px;}
.range-line{
  flex:1;max-width:300px;height:2px;
  background:repeating-linear-gradient(90deg,var(--amber) 0,var(--amber) 12px,transparent 12px,transparent 24px);
}

/* ===== Process（特徴）===== */
.feat-section{background:var(--bg);}
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin-top:48px;}
.feat-card{
  background:var(--paper);border:1px solid var(--line);border-radius:18px;
  padding:36px 28px;transition:all 0.3s;position:relative;overflow:hidden;
}
.feat-card::before{
  content:'';position:absolute;top:0;left:0;width:100%;height:4px;
  background:linear-gradient(90deg,var(--copper) 0%,var(--amber) 100%);
  transform:scaleX(0);transform-origin:left;transition:transform 0.4s;
}
.feat-card:hover::before{transform:scaleX(1);}
.feat-card:hover{transform:translateY(-4px);box-shadow:0 16px 40px rgba(168,94,45,0.12);}
.feat-icon{
  width:56px;height:56px;
  background:var(--copper);color:var(--amber);
  border-radius:14px;
  display:grid;place-items:center;
  font-family:'Noto Serif JP',serif;font-size:1.5rem;font-weight:700;
  margin-bottom:22px;
}
.feat-card h3{font-family:'Noto Serif JP',serif;font-size:1.2rem;font-weight:700;color:var(--ink);margin-bottom:12px;}
.feat-card p{font-size:0.9rem;color:var(--ink-2);line-height:1.95;}

/* ===== Industries（用途分野） ===== */
.ind-section{background:var(--paper);}
.ind-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:48px;}
.ind-cell{
  background:#fff;border:1px solid var(--line);border-radius:14px;
  padding:32px 18px;text-align:center;
  transition:all 0.2s;
}
.ind-cell:hover{border-color:var(--copper);background:var(--copper-soft);transform:translateY(-3px);}
.ind-num{
  font-family:'JetBrains Mono',monospace;color:var(--amber);
  font-size:0.65rem;letter-spacing:0.2em;font-weight:700;margin-bottom:14px;
}
.ind-cell h4{font-family:'Noto Serif JP',serif;font-size:1.05rem;font-weight:700;color:var(--copper-dark);margin-bottom:6px;}
.ind-cell p{font-size:0.78rem;color:var(--mute);line-height:1.7;}

/* ===== About / 会社情報 ===== */
.about-section{background:var(--bg);}
.about-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:64px;margin-top:48px;align-items:start;}
.about-photo{
  aspect-ratio:5/6;border-radius:20px;overflow:hidden;
  box-shadow:0 24px 60px rgba(168,94,45,0.15);
}
.about-photo img{width:100%;height:100%;object-fit:cover;}
.about-card{
  background:var(--paper);border:1px solid var(--line);border-radius:18px;
  padding:36px 32px;
}
.about-card h3{font-family:'Noto Serif JP',serif;font-size:1.3rem;font-weight:700;color:var(--copper);padding-bottom:14px;margin-bottom:18px;border-bottom:2px solid var(--copper);}
.info-table{width:100%;border-collapse:collapse;}
.info-table tr{border-bottom:1px dashed var(--line);}
.info-table tr:last-child{border-bottom:none;}
.info-table th{text-align:left;padding:14px 0;font-weight:600;width:100px;color:var(--mute);font-size:0.78rem;}
.info-table td{padding:14px 0;font-size:0.92rem;color:var(--ink-2);}

/* ===== Quote（代表者哲学） ===== */
.quote-section{background:var(--copper);color:#fff;text-align:center;padding:96px 48px;}
.quote-section blockquote{
  font-family:'Noto Serif JP',serif;font-size:clamp(1.5rem,2.5vw,2rem);
  font-weight:500;line-height:2;max-width:900px;margin:0 auto 32px;
  position:relative;
}
.quote-section blockquote::before{
  content:'「';position:absolute;top:-40px;left:-20px;
  font-size:5rem;color:var(--amber);opacity:0.5;
}
.quote-section blockquote::after{
  content:'」';position:absolute;bottom:-60px;right:0;
  font-size:5rem;color:var(--amber);opacity:0.5;
}
.quote-author{
  font-family:'JetBrains Mono',monospace;font-size:0.85rem;letter-spacing:0.15em;
  color:var(--amber);font-weight:700;
}
.quote-author small{display:block;color:rgba(255,255,255,0.7);margin-top:6px;letter-spacing:0.05em;text-transform:none;font-family:'Noto Sans JP',sans-serif;font-size:0.75rem;}

/* ===== Contact CTA ===== */
.cta-section{
  background:var(--ink);color:#fff;text-align:center;padding:96px 48px;
  position:relative;overflow:hidden;
}
.cta-section::before{
  content:'';position:absolute;top:-200px;left:-100px;width:500px;height:500px;
  background:radial-gradient(circle,rgba(212,165,52,0.1) 0%,transparent 70%);
}
.cta-section h2{color:#fff;font-family:'Noto Serif JP',serif;font-size:clamp(2rem,3vw,2.6rem);font-weight:700;margin-bottom:18px;}
.cta-section h2 em{color:var(--amber);font-style:normal;}
.cta-section p{color:rgba(255,255,255,0.85);font-size:1.05rem;line-height:1.95;margin-bottom:36px;}
.cta-tel{font-family:'Noto Serif JP',serif;font-size:2.8rem;font-weight:700;color:var(--amber);letter-spacing:0.02em;display:inline-block;margin-bottom:8px;text-decoration:none;}
.cta-tel:hover{text-decoration:underline;}
.cta-tel-note{font-size:0.82rem;color:rgba(255,255,255,0.7);margin-bottom:36px;}
.cta-btn{
  display:inline-flex;align-items:center;gap:10px;
  background:var(--amber);color:var(--ink);
  padding:18px 40px;border-radius:6px;font-weight:900;
  text-decoration:none;letter-spacing:0.05em;transition:all 0.2s;
}
.cta-btn:hover{background:#fff;transform:translateY(-2px);}

/* ===== Footer ===== */
footer{background:var(--ink);color:rgba(255,255,255,0.7);padding:64px 48px 32px;border-top:1px solid rgba(212,165,52,0.2);}
.footer-inner{max-width:1300px;margin:0 auto;display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:48px;}
.footer-brand .logo-text strong{color:#fff;}
.footer-brand .logo-text small{color:rgba(255,255,255,0.5);}
.footer-info{font-size:0.82rem;line-height:1.9;margin-top:18px;color:rgba(255,255,255,0.65);}
.footer-h{font-family:'JetBrains Mono',monospace;font-size:0.72rem;letter-spacing:0.2em;color:var(--amber);font-weight:700;text-transform:uppercase;margin-bottom:18px;}
.footer-nav{display:flex;flex-direction:column;gap:10px;}
.footer-nav a{color:rgba(255,255,255,0.7);font-size:0.85rem;text-decoration:none;}
.footer-nav a:hover{color:#fff;}
.footer-copy{max-width:1300px;margin:48px auto 0;padding-top:24px;border-top:1px solid rgba(255,255,255,0.1);display:flex;justify-content:space-between;font-size:0.72rem;color:rgba(255,255,255,0.4);}

/* ===== Recruit specific ===== */
.page-hero{padding:140px 48px 64px;background:linear-gradient(135deg,var(--copper) 0%,var(--copper-dark) 100%);color:#fff;position:relative;overflow:hidden;}
.page-hero::before{content:'RECRUIT';position:absolute;top:80px;right:48px;font-family:'JetBrains Mono',monospace;font-weight:700;font-size:9rem;color:rgba(255,255,255,0.06);letter-spacing:-0.04em;line-height:1;pointer-events:none;}
.page-hero-inner{max-width:1300px;margin:0 auto;position:relative;z-index:1;}
.page-hero .crumb{display:inline-block;font-family:'JetBrains Mono',monospace;font-size:0.72rem;letter-spacing:0.25em;color:var(--amber);margin-bottom:18px;}
.page-hero h1{font-family:'Noto Serif JP',serif;font-size:clamp(2.4rem,4vw,3.4rem);font-weight:700;line-height:1.4;margin-bottom:18px;}
.page-hero h1 em{font-style:normal;color:var(--amber);}
.page-hero p{font-size:1.05rem;line-height:2;color:rgba(255,255,255,0.9);max-width:680px;}

.jobs-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px;margin-top:48px;}
.job-card{background:#fff;border:1.5px solid var(--line);border-radius:18px;padding:32px 28px;transition:all 0.2s;}
.job-card:hover{border-color:var(--copper);box-shadow:0 12px 32px rgba(168,94,45,0.1);}
.job-tag{display:inline-block;background:var(--copper-soft);color:var(--copper-dark);font-family:'JetBrains Mono',monospace;font-size:0.7rem;letter-spacing:0.15em;padding:5px 12px;border-radius:30px;font-weight:700;margin-bottom:14px;text-transform:uppercase;}
.job-card h3{font-family:'Noto Serif JP',serif;font-size:1.2rem;font-weight:700;color:var(--ink);margin-bottom:10px;}
.job-card p{font-size:0.88rem;color:var(--ink-2);line-height:1.85;margin-bottom:18px;}
.job-meta{display:flex;flex-direction:column;gap:8px;padding-top:18px;border-top:1px dashed var(--line);}
.job-meta-row{display:flex;justify-content:space-between;font-size:0.82rem;}
.job-meta-row span:first-child{color:var(--mute);}
.job-meta-row span:last-child{color:var(--copper-dark);font-weight:700;}

.welfare-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:48px;}
.welfare-item{background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px 24px;display:flex;align-items:center;gap:18px;}
.welfare-icon{width:42px;height:42px;background:var(--copper-soft);color:var(--copper);border-radius:10px;display:grid;place-items:center;flex-shrink:0;font-weight:900;font-size:1.2rem;}
.welfare-item h4{font-size:0.95rem;font-weight:700;color:var(--ink);margin-bottom:2px;}
.welfare-item p{font-size:0.78rem;color:var(--mute);}

/* Responsive */
@media(max-width:1000px){
  header{padding:0 20px;}
  nav a:not(.nav-cta){display:none;}
  .hero-inner,.about-grid{grid-template-columns:1fr;gap:32px;}
  .feat-grid,.jobs-grid,.welfare-grid{grid-template-columns:1fr;}
  .ind-grid{grid-template-columns:1fr 1fr;}
  .footer-inner{grid-template-columns:1fr;}
  .section,.cta-section{padding:64px 24px;}
  .hero{padding:120px 24px 60px;}
  .range-vis{flex-direction:column;}
  .range-line{height:2px;width:80%;}
  footer{padding:48px 24px 24px;}
  .hero-badge{left:-10px;}
}