/* ==========================================================
   株式会社清和建設 corporate site — shared stylesheet
   ========================================================== */

:root{
  --main-navy:#081a38;
  --main-blue:#0e3a8a;
  --main-blue-mid:#155ec4;
  --accent:#33b1ff;
  --accent-light:#7ed1ff;
  --sub-slate:#5b6b84;
  --sub-bg:#f2f6fc;
  --sub-line:#dde6f2;
  --white:#ffffff;
  --text:#0f1b2d;

  --grad-main:linear-gradient(135deg,#050f24 0%,#0e3a8a 55%,#155ec4 100%);
  --grad-main-soft:linear-gradient(160deg,#0a2350 0%,#12459c 100%);
  --grad-accent:linear-gradient(135deg,#155ec4 0%,#33b1ff 100%);
  --grad-text:linear-gradient(90deg,#0e3a8a,#33b1ff 80%);

  --radius:16px;
  --radius-sm:10px;
  --shadow-md:0 10px 30px rgba(10,35,80,.10);
  --shadow-lg:0 20px 50px rgba(10,35,80,.18);
}

*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:"Hiragino Kaku Gothic ProN","Hiragino Sans","Yu Gothic",Meiryo,sans-serif;
  color:var(--text);
  background:var(--white);
  line-height:1.85;
  font-size:16px;
  overflow-x:hidden;
}
a{text-decoration:none;color:inherit;}
img{max-width:100%;display:block;}
ul{list-style:none;}
.container{max-width:1180px;margin:0 auto;padding:0 28px;}
section{padding:110px 0;position:relative;}

/* ---------- reveal-on-scroll ---------- */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .8s ease,transform .8s ease;}
.reveal.in{opacity:1;transform:translateY(0);}

/* ---------- decorative gradient blobs ---------- */
.blob{position:absolute;border-radius:50%;filter:blur(70px);pointer-events:none;z-index:0;}

/* ---------- header ---------- */
header.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  background:rgba(255,255,255,.72);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid rgba(221,230,242,.8);
  transition:background .3s,box-shadow .3s;
}
header.site-header.scrolled{background:rgba(255,255,255,.94);box-shadow:0 6px 24px rgba(10,35,80,.08);}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  max-width:1180px;margin:0 auto;padding:14px 28px;
}
.logo{display:flex;align-items:center;gap:12px;}
.logo-mark{
  width:46px;height:46px;border-radius:50%;
  background:var(--grad-accent);
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-weight:700;font-size:18px;flex-shrink:0;
  box-shadow:0 6px 16px rgba(21,94,196,.35);
}
.logo-text{line-height:1.3;}
.logo-text .en{font-size:10.5px;letter-spacing:.14em;color:var(--sub-slate);display:block;}
.logo-text .ja{font-size:18px;font-weight:700;color:var(--main-navy);display:block;}

nav.main-nav ul{display:flex;align-items:center;gap:4px;}
nav.main-nav a{
  position:relative;display:block;padding:10px 16px;font-size:14.5px;font-weight:600;
  color:var(--main-navy);border-radius:999px;transition:color .2s;
}
nav.main-nav a:not(.nav-cta)::after{
  content:"";position:absolute;left:16px;right:16px;bottom:6px;height:2px;
  background:var(--grad-accent);transform:scaleX(0);transform-origin:left;transition:transform .25s;
}
nav.main-nav a:not(.nav-cta):hover::after{transform:scaleX(1);}
nav.main-nav a:not(.nav-cta):hover{color:var(--main-blue-mid);}
nav.main-nav a.current::after{transform:scaleX(1);}
.nav-cta{background:var(--grad-accent)!important;color:#fff!important;box-shadow:0 8px 20px rgba(21,94,196,.3);}
.nav-cta:hover{filter:brightness(1.08);}

#nav-toggle{display:none;}
.hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px;}
.hamburger span{width:24px;height:2px;background:var(--main-navy);display:block;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:14px 30px;border-radius:999px;font-weight:700;font-size:14.5px;
  transition:transform .2s,box-shadow .2s,filter .2s;cursor:pointer;border:none;
}
.btn-primary{background:var(--grad-accent);color:#fff;box-shadow:0 12px 28px rgba(21,94,196,.35);}
.btn-primary:hover{transform:translateY(-3px);filter:brightness(1.06);}
.btn-outline{background:rgba(255,255,255,.08);color:#fff;border:1.5px solid rgba(255,255,255,.55);}
.btn-outline:hover{background:rgba(255,255,255,.16);transform:translateY(-3px);}
.btn-outline-dark{background:transparent;color:var(--main-blue);border:1.5px solid var(--sub-line);}
.btn-outline-dark:hover{border-color:var(--accent);color:var(--main-blue-mid);transform:translateY(-3px);}

/* ---------- section headings ---------- */
.sec-head{margin-bottom:56px;text-align:center;position:relative;z-index:1;}
.sec-tag{
  display:inline-block;color:var(--accent);font-weight:700;font-size:13px;letter-spacing:.2em;
  margin-bottom:10px;
}
.sec-title{
  font-size:30px;font-weight:700;
  background:var(--grad-text);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.sec-sub{color:var(--sub-slate);font-size:14.5px;margin-top:14px;max-width:580px;margin-left:auto;margin-right:auto;}

/* ---------- page hero (subpages) ---------- */
.page-hero{
  margin-top:74px;background:var(--grad-main);color:#fff;
  padding:100px 0 64px;position:relative;overflow:hidden;
}
.page-hero .blob{background:var(--accent);opacity:.35;}
.page-hero-inner{position:relative;z-index:1;max-width:1180px;margin:0 auto;padding:0 28px;}
.breadcrumb{font-size:13px;color:#a9c7ec;margin-bottom:14px;}
.breadcrumb a{color:#dcecfb;font-weight:600;}
.breadcrumb a:hover{color:#fff;}
.page-hero h1{font-size:32px;font-weight:700;margin-bottom:10px;}
.page-hero p{color:#c6dcf3;font-size:14.5px;max-width:560px;}

/* ---------- hero (home / video) ---------- */
.hero-video-wrap{
  position:relative;width:100vw;margin-left:calc(50% - 50vw);
  height:min(100vh,760px);min-height:560px;overflow:hidden;margin-top:74px;
}
.hero-video-wrap video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;}
.hero-overlay{
  position:absolute;inset:0;
  background:linear-gradient(120deg,rgba(5,15,36,.92) 0%,rgba(14,58,138,.72) 45%,rgba(21,94,196,.28) 78%);
}
.hero-content{
  position:absolute;inset:0;display:flex;flex-direction:column;justify-content:center;
  max-width:1180px;margin:0 auto;padding:0 28px;color:#fff;z-index:2;
}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;color:#dff0ff;font-weight:700;font-size:12.5px;
  letter-spacing:.16em;border:1px solid rgba(255,255,255,.45);padding:6px 16px;border-radius:999px;
  margin-bottom:26px;width:fit-content;background:rgba(255,255,255,.08);
}
.hero-content h1{
  font-size:40px;font-weight:700;line-height:1.55;margin-bottom:22px;max-width:720px;
}
.hero-content h1 span{
  background:linear-gradient(90deg,#7ed1ff,#33b1ff);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-content p{color:#d7e6f7;font-size:15.5px;max-width:540px;margin-bottom:36px;}
.hero-btns{display:flex;gap:16px;flex-wrap:wrap;}
.scroll-cue{
  position:absolute;left:50%;bottom:28px;transform:translateX(-50%);z-index:2;
  width:26px;height:42px;border:2px solid rgba(255,255,255,.6);border-radius:20px;
}
.scroll-cue::before{
  content:"";position:absolute;top:8px;left:50%;width:4px;height:8px;margin-left:-2px;
  background:#fff;border-radius:2px;animation:scrollcue 1.6s infinite;
}
@keyframes scrollcue{0%{opacity:1;transform:translateY(0);}70%{opacity:0;transform:translateY(14px);}100%{opacity:0;}}

/* ---------- stats overlap strip ---------- */
.stats-strip{
  position:relative;z-index:3;max-width:1000px;margin:-64px auto 0;padding:0 28px;
}
.stats-card{
  background:#fff;border-radius:var(--radius);box-shadow:var(--shadow-lg);
  display:grid;grid-template-columns:repeat(3,1fr);overflow:hidden;
}
.stats-card div{padding:32px 20px;text-align:center;border-right:1px solid var(--sub-line);}
.stats-card div:last-child{border-right:none;}
.stats-card .num{
  font-size:26px;font-weight:700;
  background:var(--grad-text);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.stats-card .lbl{font-size:12.5px;color:var(--sub-slate);margin-top:6px;}

/* ---------- overview / link cards ---------- */
.overview{padding-top:150px;background:var(--sub-bg);}
.overview-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;position:relative;z-index:1;}
.ov-card{
  background:#fff;border-radius:var(--radius);padding:34px 28px;box-shadow:var(--shadow-md);
  border-top:3px solid transparent;border-image:var(--grad-accent) 1;
  transition:transform .3s,box-shadow .3s;
}
.ov-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg);}
.ov-card .icon{
  width:52px;height:52px;border-radius:14px;background:var(--grad-accent);
  display:flex;align-items:center;justify-content:center;color:#fff;margin-bottom:20px;
}
.ov-card h3{font-size:17.5px;color:var(--main-navy);margin-bottom:10px;}
.ov-card p{font-size:13.5px;color:var(--sub-slate);margin-bottom:18px;}
.ov-card .go{font-size:13px;font-weight:700;color:var(--main-blue-mid);display:inline-flex;align-items:center;gap:6px;}
.ov-card:hover .go{color:var(--accent);}

/* ---------- generic cards ---------- */
.card{
  background:#fff;border-radius:var(--radius);padding:32px 26px;box-shadow:var(--shadow-md);
  transition:transform .3s,box-shadow .3s;
}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);}

/* ---------- about / company ---------- */
.about-grid{display:grid;grid-template-columns:.95fr 1.05fr;gap:60px;align-items:start;}
.about-visual{
  border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-lg);
  aspect-ratio:4/5;position:relative;
}
.about-visual img{width:100%;height:100%;object-fit:cover;}
table.info{width:100%;border-collapse:collapse;font-size:14.5px;}
table.info th,table.info td{text-align:left;padding:16px 12px;border-bottom:1px solid var(--sub-line);vertical-align:top;}
table.info th{width:150px;color:var(--main-navy);font-weight:700;white-space:nowrap;}
.badge-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:24px;}
.badge{
  background:var(--sub-bg);border:1px solid var(--sub-line);color:var(--main-blue);
  font-size:12.5px;font-weight:700;padding:7px 16px;border-radius:999px;
}

/* ---------- business / process ---------- */
.business-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;}
.biz-card{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-md);background:#fff;transition:transform .3s,box-shadow .3s;}
.biz-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg);}
.biz-card .ph{aspect-ratio:4/3;overflow:hidden;position:relative;}
.biz-card .ph img{width:100%;height:100%;object-fit:cover;transition:transform .5s;}
.biz-card:hover .ph img{transform:scale(1.07);}
.biz-card .ph::after{
  content:"";position:absolute;inset:0;background:linear-gradient(0deg,rgba(8,26,56,.55),transparent 55%);
}
.biz-card .tagnum{
  position:absolute;top:14px;left:14px;color:#fff;font-weight:700;font-size:13px;
  background:rgba(8,26,56,.55);backdrop-filter:blur(6px);padding:5px 12px;border-radius:999px;
}
.biz-card .body{padding:24px 22px 28px;}
.biz-card h3{font-size:17px;color:var(--main-navy);margin-bottom:10px;}
.biz-card p{font-size:13.5px;color:var(--sub-slate);}

.process{display:grid;grid-template-columns:repeat(4,1fr);gap:0;position:relative;margin-top:20px;}
.process::before{
  content:"";position:absolute;top:26px;left:12%;right:12%;height:2px;background:var(--sub-line);z-index:0;
}
.proc-step{position:relative;z-index:1;text-align:center;padding:0 14px;}
.proc-num{
  width:54px;height:54px;border-radius:50%;background:var(--grad-accent);color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:18px;
  margin:0 auto 18px;box-shadow:0 10px 22px rgba(21,94,196,.3);
}
.proc-step h4{font-size:15px;color:var(--main-navy);margin-bottom:8px;}
.proc-step p{font-size:12.5px;color:var(--sub-slate);}

/* ---------- clients ---------- */
.clients-section{background:var(--grad-main);color:#fff;}
.clients-section .sec-title{background:none;-webkit-text-fill-color:initial;color:#fff;}
.clients-section .sec-sub{color:#c6dcf3;}
.client-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.client-card{
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.2);border-radius:var(--radius);
  padding:26px 22px;transition:transform .3s,background .3s;
}
.client-card:hover{transform:translateY(-6px);background:rgba(255,255,255,.14);}
.client-card .tag{font-size:11.5px;color:var(--accent-light);font-weight:700;letter-spacing:.06em;}
.client-card .name{font-size:16px;font-weight:700;margin-top:8px;}

/* ---------- works ---------- */
.works-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;}
.work-item{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-md);background:#fff;}
.work-item .ph{
  aspect-ratio:4/3;background:linear-gradient(135deg,var(--sub-bg),#dde9f7);
  display:flex;align-items:center;justify-content:center;color:var(--sub-slate);font-size:13.5px;
  border-bottom:1px dashed var(--sub-line);
}
.work-item .body{padding:20px 22px 26px;}
.work-item .cat{font-size:12px;color:var(--accent);font-weight:700;}
.work-item .cat + .desc{margin-top:6px;}
.work-item .desc{font-size:14.5px;color:var(--main-navy);font-weight:700;}
.works-note{
  margin-top:36px;text-align:center;color:var(--sub-slate);font-size:13.5px;
  background:var(--sub-bg);border:1px dashed var(--sub-line);border-radius:var(--radius);padding:18px;
}

/* ---------- contact ---------- */
.contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:44px;align-items:start;}
.contact-card{background:var(--sub-bg);border-radius:var(--radius);padding:36px;}
.contact-card table{width:100%;font-size:14.5px;border-collapse:collapse;}
.contact-card th{text-align:left;padding:13px 10px 13px 0;color:var(--main-navy);width:110px;vertical-align:top;}
.contact-card td{padding:13px 0;border-bottom:1px solid var(--sub-line);}
.mail-cta{
  margin-top:26px;display:flex;flex-direction:column;gap:12px;
}
.mail-btn{
  display:flex;align-items:center;gap:14px;background:var(--grad-accent);color:#fff;padding:18px 22px;
  border-radius:var(--radius-sm);font-weight:700;box-shadow:0 12px 26px rgba(21,94,196,.3);transition:.25s;
}
.mail-btn:hover{transform:translateY(-3px);filter:brightness(1.05);}
.mail-btn .ic{width:38px;height:38px;border-radius:50%;background:rgba(255,255,255,.18);display:flex;align-items:center;justify-content:center;flex-shrink:0;}
.mail-btn small{display:block;font-weight:400;font-size:12px;opacity:.85;}
.map-box{position:relative;border-radius:var(--radius);overflow:hidden;min-height:320px;box-shadow:var(--shadow-md);background:var(--sub-bg);}
.map-box iframe{width:100%;height:100%;min-height:320px;border:0;display:block;}
.map-link{
  position:absolute;left:16px;bottom:16px;z-index:2;background:#fff;color:var(--main-blue);
  font-size:13px;font-weight:700;padding:10px 18px;border-radius:999px;box-shadow:var(--shadow-md);
  text-decoration:none;display:inline-flex;align-items:center;gap:6px;
}
.map-link:hover{background:var(--main-blue);color:#fff;}

/* ---------- floating home button ---------- */
.fab-home{
  position:fixed;right:24px;bottom:24px;z-index:900;width:58px;height:58px;border-radius:50%;
  background:var(--grad-accent);display:flex;align-items:center;justify-content:center;color:#fff;
  box-shadow:0 12px 30px rgba(21,94,196,.42);transition:transform .25s,box-shadow .25s;
}
.fab-home:hover{transform:translateY(-5px) scale(1.06);box-shadow:0 18px 36px rgba(21,94,196,.5);}
.fab-home svg{width:24px;height:24px;}

/* ---------- footer ---------- */
footer.site-footer{background:var(--main-navy);color:#a9c0dc;padding:64px 0 26px;font-size:13.5px;}
.footer-grid{display:grid;grid-template-columns:1.3fr .8fr 1fr;gap:44px;margin-bottom:40px;}
.footer-logo{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.footer-logo .logo-mark{box-shadow:none;}
footer .fname{color:#fff;font-weight:700;font-size:16px;}
footer h5{color:#fff;font-size:14px;margin-bottom:16px;letter-spacing:.04em;}
footer ul li{margin-bottom:10px;}
footer ul li a:hover{color:#fff;}
footer .foot-desc{color:#8fa8c9;font-size:13px;margin-top:14px;max-width:320px;}
.footer-map{
  position:relative;border-radius:var(--radius-sm);overflow:hidden;height:220px;margin-bottom:36px;
  border:1px solid rgba(255,255,255,.14);filter:grayscale(.15) contrast(1.05);background:#0e1c33;
}
.footer-map iframe{width:100%;height:100%;border:0;display:block;}
.footer-map .map-link{filter:none;}

.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);padding-top:22px;text-align:center;color:#7791b3;font-size:12px;
}

/* ---------- responsive ---------- */
@media (max-width:960px){
  .about-grid,.contact-grid{grid-template-columns:1fr;}
  .overview-grid,.business-grid,.client-grid,.works-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .process{grid-template-columns:repeat(2,1fr);row-gap:36px;}
  .process::before{display:none;}
  .stats-card{grid-template-columns:1fr;}
  .stats-card div{border-right:none;border-bottom:1px solid var(--sub-line);}
  .stats-card div:last-child{border-bottom:none;}
}
@media (max-width:640px){
  nav.main-nav{
    position:fixed;top:73px;left:0;right:0;background:#fff;
    transform:translateY(-150%);transition:.25s;box-shadow:0 10px 24px rgba(0,0,0,.08);
    max-height:calc(100vh - 73px);overflow-y:auto;
  }
  #nav-toggle:checked ~ nav.main-nav{transform:translateY(0);}
  nav.main-nav ul{flex-direction:column;align-items:stretch;padding:18px;gap:6px;}
  nav.main-nav a{padding:13px 16px;}
  .hamburger{display:flex;}
  section{padding:70px 0;}
  .overview{padding-top:120px;}
  .overview-grid,.business-grid,.client-grid,.works-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .hero-content h1{font-size:27px;}
  .hero-video-wrap{height:88vh;}
  .stats-strip{margin-top:-40px;}
  .page-hero h1{font-size:25px;}
}