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

:root[data-theme="light"]{
  --blue:#2A8FD4;
  --blue-dark:#185FA5;
  --blue-light:#E8F4FC;
  --blue-mid:#B5D4F4;
  --text:#1a1a2e;
  --text-mid:#4a4a5a;
  --text-light:#7a7a8a;
  --bg:#f0f7fc;
  --surface:#ffffff;
  --card-border:#dde8f0;
  --nav-bg:rgba(255,255,255,0.97);
  --nav-border:#B5D4F4;
  --footer-bg:#1a2d40;
  --footer-text:#8aa8c0;
  --footer-copy:#5a7a94;
  --input-bg:#f0f7fc;
  --success-bg:#E8F4FC;
  --table-border:#eef3f8;
}
:root[data-theme="dark"]{
  --blue:#4aaee8;
  --blue-dark:#2A8FD4;
  --blue-light:#0d2233;
  --blue-mid:#1a3a52;
  --text:#e8f0f7;
  --text-mid:#a0b8cc;
  --text-light:#6a8899;
  --bg:#0d1a24;
  --surface:#132030;
  --card-border:#1e3548;
  --nav-bg:rgba(13,26,36,0.97);
  --nav-border:#1a3a52;
  --footer-bg:#0a1520;
  --footer-text:#5a7a94;
  --footer-copy:#3a5a74;
  --input-bg:#0d1a24;
  --success-bg:#0d2233;
  --table-border:#1a3548;
}

html{scroll-behavior:smooth;}
body{font-family:'Noto Sans JP',sans-serif;background:var(--bg);color:var(--text);font-size:16px;line-height:1.8;transition:background 0.3s,color 0.3s;}

/* NAV */
nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:var(--nav-bg);
  border-bottom:1px solid var(--nav-border);
  display:flex;align-items:center;justify-content:space-between;
  padding:0 40px;height:56px;
  transition:background 0.3s,border-color 0.3s;
}
.nav-logo{font-size:18px;font-weight:700;color:var(--blue);text-decoration:none;letter-spacing:0.05em;}
.nav-links{display:flex;gap:28px;align-items:center;}
.nav-links a{text-decoration:none;font-size:14px;font-weight:400;color:var(--text-mid);letter-spacing:0.04em;transition:color 0.2s;}
.nav-links a:hover{color:var(--blue);}


/* HAMBURGER */
.hamburger{
  display:none;
  flex-direction:column;
  justify-content:center;
  gap:5px;
  width:36px;height:36px;
  background:none;border:none;
  cursor:pointer;padding:6px;
  border-radius:4px;
  flex-shrink:0;
}
.hamburger span{
  display:block;height:2px;width:100%;
  background:var(--text);border-radius:2px;
  transition:transform 0.3s,opacity 0.3s;
}
.hamburger.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.hamburger.open span:nth-child(2){opacity:0;transform:scaleX(0);}
.hamburger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
.mobile-menu{
  display:none;
  position:fixed;top:56px;left:0;right:0;
  background:var(--nav-bg);
  border-bottom:1px solid var(--nav-border);
  padding:8px 24px 16px;
  z-index:99;
  flex-direction:column;
  transition:background 0.3s,border-color 0.3s;
}
.mobile-menu.open{display:flex;}
.mobile-menu a{
  text-decoration:none;font-size:15px;
  color:var(--text-mid);
  padding:13px 0;
  border-bottom:1px solid var(--card-border);
  letter-spacing:0.03em;
  transition:color 0.2s;
}
.mobile-menu a:last-child{border-bottom:none;}
.mobile-menu a:hover,.mobile-menu a:focus{color:var(--blue);}

/* HERO */
.hero{
  margin-top:56px;position:relative;
  --hero-h:480px;
  height:var(--hero-h);overflow:hidden;
  display:flex;align-items:center;
}
.hero-overlay{
  position:absolute;inset:0;
  background:linear-gradient(to right, var(--bg) 0%, var(--bg) 35%, rgba(13,26,36,0) 75%);
  z-index:1;
  transition:background 0.3s;
}
.hero-img{
  position:absolute;inset:0;
  background-image:url('hero.png');
}
.hero-img{
  background-position:center center;
  background-size:0 0;
  background-repeat:no-repeat;
  background-color:transparent;
  overflow:hidden;
}
.hero-img::before,.hero-img::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:inherit;
  background-position:center center;
  background-repeat:no-repeat;
  pointer-events:none;
}
.hero-img::before{
  inset:-32px;
  background-size:cover;
  filter:blur(18px) saturate(1.08);
  transform:scale(1.04);
}
.hero-img::after{
  inset:auto;
  top:50%;
  left:50%;
  width:min(100%, calc(var(--hero-h) * 1.5882352941));
  aspect-ratio:972 / 612;
  transform:translate(-50%,-50%);
  background-size:cover;
  filter:drop-shadow(0 18px 28px rgba(0,0,0,0.14));
}
[data-theme="light"] .hero-img{opacity:1;}
[data-theme="dark"] .hero-img{opacity:1;}
[data-theme="light"] .hero-img::before{opacity:0.34;}
[data-theme="dark"] .hero-img::before{opacity:0.28;}
[data-theme="light"] .hero-img::after{opacity:0.92;}
[data-theme="dark"] .hero-img::after{opacity:0.68;}
[data-theme="light"] .hero-overlay{background:linear-gradient(to right, rgba(240,247,252,0.18) 0%, rgba(240,247,252,0) 60%);}
[data-theme="dark"] .hero-overlay{background:linear-gradient(to right, rgba(13,26,36,0.24) 0%, rgba(13,26,36,0) 60%);}
.hero-content{position:relative;z-index:2;padding:0 60px;max-width:620px;}
.hero-title{font-size:clamp(22px,2.8vw,34px);font-weight:700;color:var(--text);line-height:1.5;margin-bottom:20px;letter-spacing:0.02em;}
.hero-sub{font-size:14px;color:var(--text-mid);line-height:1.8;margin-bottom:32px;}
.hero-btn{
  display:inline-block;padding:11px 32px;
  background:var(--blue);color:#fff;
  text-decoration:none;font-size:13px;font-weight:500;
  letter-spacing:0.08em;cursor:pointer;border:none;
  border-radius:2px;transition:background 0.2s;
}
.hero-btn:hover{background:var(--blue-dark);}

/* SECTION */
section{padding:80px 40px;}
.section-title{font-size:clamp(22px,2.4vw,30px);font-weight:700;color:var(--blue);text-align:center;margin-bottom:10px;letter-spacing:0.04em;}
.section-sub{text-align:center;font-size:15px;color:var(--text-mid);margin-bottom:48px;}

/* SERVICES */
.services{background:var(--bg);transition:background 0.3s;}
.services-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;max-width:1200px;margin:0 auto;}
.service-card{
  background:var(--surface);border-radius:8px;overflow:hidden;
  border:1px solid var(--card-border);
  transition:box-shadow 0.2s,transform 0.2s,background 0.3s,border-color 0.3s;
}
.service-card:hover{box-shadow:0 4px 20px rgba(42,143,212,0.18);transform:translateY(-2px);}
.service-img{
  width:100%;height:140px;
  background:var(--blue-light);
  display:flex;align-items:center;justify-content:center;
  font-size:44px;
  transition:background 0.3s;
}
.service-img i{
  font-size:48px;
  color:var(--blue);
  opacity:0.85;
  transition:color 0.3s;
}
.service-card:hover .service-img i{
  opacity:1;
}
.service-body{padding:20px;}
.service-name{font-size:16px;font-weight:700;color:var(--text);margin-bottom:10px;line-height:1.45;transition:color 0.3s;}
.service-desc{font-size:14px;color:var(--text-mid);line-height:1.75;margin-bottom:0;transition:color 0.3s;}

/* ABOUT */
.about{background:var(--surface);transition:background 0.3s;}
.about-inner{display:grid;grid-template-columns:1fr 1fr;gap:24px;max-width:1100px;margin:0 auto;}
.about-card{
  border:1px solid var(--card-border);
  border-radius:8px;overflow:hidden;
  transition:border-color 0.3s;
}
.about-map{
  border:1px solid var(--card-border);
  border-radius:8px;overflow:hidden;
  min-height:280px;
  transition:border-color 0.3s;
}
.about-map iframe{width:100%;height:100%;display:block;border:0;}
.about-table{width:100%;border-collapse:collapse;}
.about-table tr{border-bottom:1px solid var(--table-border);transition:border-color 0.3s;}
.about-table tr:last-child{border-bottom:none;}
.about-table td{padding:18px 28px;font-size:15px;vertical-align:top;transition:color 0.3s;}
.about-table th{width:130px;font-weight:500;color:var(--text-mid);white-space:nowrap;}
.about-table td:last-child{color:var(--text);}

/* CONTACT */
.contact-section{background:var(--bg);transition:background 0.3s;}
.contact-wrap{
  max-width:700px;margin:0 auto;
  background:var(--surface);
  border:1px solid var(--card-border);
  border-radius:8px;padding:40px;
  transition:background 0.3s,border-color 0.3s;
}
.form-group{margin-bottom:20px;}
.form-label{display:block;font-size:13px;font-weight:500;color:var(--text-mid);margin-bottom:6px;letter-spacing:0.05em;}
.req{color:var(--blue);margin-left:3px;}
.form-input,.form-textarea,.form-select{
  width:100%;padding:12px 14px;
  border:1px solid var(--card-border);
  background:var(--input-bg);
  font-family:'Noto Sans JP',sans-serif;font-size:15px;
  color:var(--text);outline:none;border-radius:4px;
  transition:border-color 0.2s,background 0.3s,color 0.3s;
}
.form-input:focus,.form-textarea:focus,.form-select:focus{border-color:var(--blue);background:var(--surface);}
.form-input:focus-visible,.form-textarea:focus-visible,.form-select:focus-visible{box-shadow:0 0 0 3px rgba(42,143,212,0.25);}
.form-input.input-error,.form-textarea.input-error,.form-select.input-error{border-color:#cc0000;}
[data-theme="dark"] .form-input.input-error,[data-theme="dark"] .form-textarea.input-error,[data-theme="dark"] .form-select.input-error{border-color:#f08080;}
.field-error{display:block;font-size:12px;color:#cc0000;margin-top:4px;}
[data-theme="dark"] .field-error{color:#f08080;}
.form-textarea{height:130px;resize:vertical;}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.privacy-note{
  margin:22px 0 14px;
  max-height:150px;
  overflow-y:auto;
  padding:12px 14px;
  border:1px solid var(--card-border);
  border-radius:6px;
  background:var(--input-bg);
  font-size:12px;
  line-height:1.55;
  color:var(--text-mid);
  transition:background 0.3s,border-color 0.3s;
}
.privacy-note p{margin-bottom:2px;line-height:1.5;}
.privacy-note p:last-child{margin-bottom:0;}
.privacy-note::-webkit-scrollbar{width:8px;}
.privacy-note::-webkit-scrollbar-track{background:transparent;}
.privacy-note::-webkit-scrollbar-thumb{background:var(--blue-mid);border-radius:999px;}
.radio-group{display:flex;gap:24px;flex-wrap:wrap;padding:6px 0;}
.radio-label{display:flex;align-items:center;gap:8px;font-size:15px;color:var(--text);cursor:pointer;line-height:1.5;}
.radio-label input{accent-color:var(--blue);width:16px;height:16px;flex:0 0 auto;cursor:pointer;}
.privacy-agree{
  display:flex;
  align-items:flex-start;
  gap:10px;
  margin:0 0 22px;
  font-size:14px;
  line-height:1.7;
  color:var(--text);
  cursor:pointer;
}
.privacy-agree input{
  width:18px;
  height:18px;
  margin-top:3px;
  accent-color:var(--blue);
  flex:0 0 auto;
}
.submit-btn{
  display:block;width:100%;padding:14px;
  background:var(--blue);color:#fff;border:none;
  font-family:'Noto Sans JP',sans-serif;font-size:15px;font-weight:500;
  letter-spacing:0.1em;cursor:pointer;border-radius:4px;
  transition:background 0.2s;
}
.submit-btn:hover{background:var(--blue-dark);}
.submit-btn:disabled{opacity:0.6;cursor:not-allowed;}
.success-box{
  display:none;margin-top:16px;padding:16px;
  background:var(--success-bg);border:1px solid var(--blue-mid);
  border-radius:4px;color:var(--blue);font-size:15px;text-align:center;
  transition:background 0.3s;
}
.error-box{
  display:none;margin-top:16px;padding:16px;
  background:#fff0f0;border:1px solid #ffb3b3;
  border-radius:4px;color:#cc0000;font-size:15px;text-align:center;
}
[data-theme="dark"] .error-box{
  background:#2a0d0d;border-color:#7a2020;color:#f08080;
}

/* FOOTER */
footer{background:var(--footer-bg);padding:40px;text-align:center;transition:background 0.3s;}
.footer-logo{font-size:17px;font-weight:700;color:#fff;margin-bottom:8px;}
.footer-info{font-size:13px;color:var(--footer-text);line-height:1.8;}
.footer-copy{font-size:12px;color:var(--footer-copy);margin-top:16px;}
.tel-link{color:inherit;text-decoration:none;}
.tel-link:hover{text-decoration:underline;}

option{background:var(--surface);color:var(--text);}

@media(max-width:900px){
  .services-grid{grid-template-columns:repeat(2,1fr);}
  .nav-links a{display:none;}
  .hero-content{padding:0 24px;}
  section{padding:60px 20px;}
  .hamburger{display:flex;}
  .about-inner{grid-template-columns:1fr;}
  .about-map{min-height:260px;}
}
@media(max-width:600px){
  .services-grid{grid-template-columns:1fr;}
  .form-row{grid-template-columns:1fr;}
  .contact-wrap{padding:24px 16px;}
  nav{padding:0 16px;height:52px;}
  .mobile-menu{top:52px;}
  .nav-logo{font-size:16px;}
  .hero{--hero-h:320px;height:var(--hero-h);min-height:320px;padding:0;}
  .hero-img::before{display:none;}
  .hero-img::after{width:100%;filter:none;}
  .hero-overlay{display:none;}
  .hero-content{padding:0 20px;max-width:100%;}
  .hero-title{font-size:clamp(18px,5vw,26px);}
  .hero-sub{font-size:14px;}
  section{padding:48px 16px;}
  .section-title{font-size:clamp(21px,4vw,26px);}
  .service-desc br{display:none;}
  .about-table td{padding:14px 16px;font-size:14px;}
  .about-table th{width:100px;}
  .privacy-note{max-height:140px;padding:12px;}
  footer{padding:32px 16px;}
}