/* ========================================
   iVIPER - Global Styles
   Design: White Base × Navy × Orange CTA
======================================== */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500;600;700;800;900&family=Inter:wght@300;400;500;600;700;800;900&display=swap');

:root{
  --bg:#ffffff;
  --bg-light:#f8f9fb;
  --bg-dark:#1a2d50;
  --bg-dark-light:#2a4070;
  --bg-card:#ffffff;
  --surface:#f1f5f9;
  --red:#1a2d50;
  --red-dark:#142340;
  --red-light:rgba(26,45,80,.06);
  --red-glow:rgba(26,45,80,.15);
  --gold:#d97706;
  --gold-light:#fef3c7;
  --cta:#e67e22;
  --cta-dark:#d35400;
  --cta-light:#f39c12;
  --blue:#2563eb;
  --text:#2c3e50;
  --text-light:#5a6c7d;
  --text-dim:#95a5a6;
  --text-bright:#1a2d50;
  --white:#ffffff;
  --border:#e0e6ed;
  --border-hover:#cbd5e1;
  --radius:8px;
  --radius-lg:16px;
  --shadow:0 1px 3px rgba(0,0,0,.06),0 4px 16px rgba(0,0,0,.04);
  --shadow-lg:0 4px 24px rgba(0,0,0,.08);
  --shadow-red:0 4px 16px rgba(26,45,80,.12);
  --shadow-cta:0 4px 16px rgba(230,126,34,.25);
  --transition:all .3s ease;
  --font-ja:'Noto Sans JP',sans-serif;
  --font-en:'Inter',sans-serif;
  --max-w:1100px;
  --header-h:72px;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:var(--header-h)}
body{font-family:var(--font-ja);background:var(--bg);color:var(--text);line-height:1.8;font-size:16px;overflow-x:hidden;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility}
::selection{background:var(--cta);color:#fff}
::-moz-selection{background:var(--cta);color:#fff}
img{max-width:100%;height:auto;display:block}
a{color:var(--red);text-decoration:none;transition:var(--transition)}
a:hover{color:var(--cta)}
ul,ol{list-style:none}

/* --- SKIP NAV --- */
.skip-nav{position:absolute;top:-100%;left:16px;background:var(--red);color:#fff;padding:12px 24px;border-radius:var(--radius);font-weight:700;font-size:14px;z-index:9999;transition:top .2s}
.skip-nav:focus{top:16px;color:#fff}

/* --- UTILITY --- */
.container{max-width:var(--max-w);margin:0 auto;padding:0 24px}
.text-center{text-align:center}
.text-red{color:var(--red)}
.text-gold{color:var(--gold)}
.text-dim{color:var(--text-dim)}
.text-bright{color:var(--text-bright)}
.font-en{font-family:var(--font-en)}

/* --- TYPOGRAPHY --- */
h1,h2,h3,h4,h5{color:var(--text-bright);font-weight:800;line-height:1.3;letter-spacing:-.01em}
h1{font-size:clamp(30px,5vw,48px)}
h2{font-size:clamp(24px,3.5vw,36px)}
h3{font-size:clamp(18px,2.5vw,24px);font-weight:700}
.section-label{display:inline-block;font-family:var(--font-ja);font-size:13px;font-weight:700;letter-spacing:.12em;color:var(--red);margin-bottom:12px;padding:4px 14px;border:1px solid rgba(26,45,80,.15);border-radius:20px;background:rgba(26,45,80,.04)}
.section-title{margin-bottom:16px;letter-spacing:-.02em}
.section-sub{color:var(--text-light);font-size:15px;max-width:640px;margin:0 auto 40px;line-height:1.9}

/* --- BUTTONS --- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 36px;font-size:15px;font-weight:700;font-family:var(--font-ja);border-radius:var(--radius);cursor:pointer;transition:var(--transition);border:none;text-decoration:none;white-space:nowrap}
.btn-primary{background:var(--cta);color:#fff;box-shadow:var(--shadow-cta)}
.btn-primary:hover{background:var(--cta-dark);color:#fff;transform:translateY(-2px);box-shadow:0 6px 24px rgba(230,126,34,.3)}
.btn-cta{background:var(--cta);color:#fff;box-shadow:var(--shadow-cta)}
.btn-cta:hover{background:var(--cta-dark);color:#fff;transform:translateY(-2px);box-shadow:0 6px 24px rgba(230,126,34,.3)}
.btn-outline{background:transparent;border:2px solid var(--text-bright);color:var(--text-bright)}
.btn-outline:hover{background:var(--text-bright);color:#fff}
.btn-outline-white{background:transparent;border:2px solid #fff;color:#fff}
.btn-outline-white:hover{background:#fff;color:var(--text-bright);transform:translateY(-2px)}
.btn-white{background:#fff;color:var(--text-bright)}
.btn-white:hover{background:var(--surface);color:var(--text-bright);transform:translateY(-2px)}
.btn-lg{padding:18px 48px;font-size:17px;border-radius:var(--radius-lg)}
.btn-sm{padding:10px 24px;font-size:13px}

/* --- HEADER --- */
.header{position:fixed;top:0;left:0;right:0;height:var(--header-h);z-index:1000;background:rgba(255,255,255,.95);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid rgba(226,232,240,.6);transition:var(--transition)}
.header.scrolled{box-shadow:var(--shadow)}
.header .container{display:flex;align-items:center;justify-content:space-between;height:100%}
.logo{font-family:var(--font-en);font-size:24px;font-weight:900;color:var(--red);letter-spacing:1px;text-decoration:none;font-style:italic}
.logo:hover{color:var(--cta)}
/* ロゴ画像に差し替える場合: .logo img{height:32px;width:auto} */
.nav{display:flex;align-items:center;gap:32px}
.nav a{color:var(--text-light);font-size:14px;font-weight:500;letter-spacing:.5px;transition:var(--transition)}
.nav a:hover{color:var(--text-bright)}
.nav a.active{color:var(--text-bright);font-weight:700;position:relative}
.nav a.active::after{content:'';position:absolute;bottom:-4px;left:0;right:0;height:2px;background:var(--red);border-radius:1px}
.nav .btn{margin-left:8px;background:var(--cta);color:#fff;box-shadow:var(--shadow-cta);font-weight:700}
.nav .btn:hover{background:var(--cta-dark);color:#fff}
.burger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px}
.burger span{display:block;width:24px;height:2px;background:var(--text-bright);transition:var(--transition);transform-origin:center}
.burger.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.burger.active span:nth-child(2){opacity:0}
.burger.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}

.mobile-nav{position:fixed;top:var(--header-h);left:0;right:0;bottom:0;background:rgba(255,255,255,.98);backdrop-filter:blur(16px);z-index:999;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:32px;opacity:0;pointer-events:none;transition:var(--transition)}
.mobile-nav.open{opacity:1;pointer-events:all}
.mobile-nav a{color:var(--text-bright);font-size:18px;font-weight:600}
.mobile-nav a.active{color:var(--cta)}

/* --- SECTION --- */
.section{padding:88px 0}
.section-white{background:var(--bg)}
.section-light{background:var(--bg-light)}
.section-dark{background:linear-gradient(180deg,var(--bg-dark) 0%,#151d2e 100%);color:#e2e8f0}
.section-dark h2,.section-dark h3,.section-dark h4{color:#fff}
.section-dark .section-label{color:rgba(230,126,34,.8);border-color:rgba(230,126,34,.25);background:rgba(230,126,34,.08)}
.section-dark .section-sub{color:#94a3b8}
.section-dark .text-light{color:#94a3b8}
.section-red{background:var(--bg-dark);color:#fff}
.section-red h2,.section-red h3{color:#fff}
.section-red p{color:rgba(255,255,255,.85)}

/* --- CARDS --- */
.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px;box-shadow:var(--shadow)}

/* --- FOOTER --- */
.footer{background:#0c1220;color:#94a3b8;padding:56px 0 72px}
.footer-inner{display:grid;grid-template-columns:1fr 1fr;gap:32px;margin-bottom:32px}
.footer h4{color:#fff;font-size:14px;font-weight:700;margin-bottom:12px}
.footer a{display:block;color:#94a3b8;font-size:13px;margin-bottom:6px;text-decoration:none}
.footer a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:20px;display:flex;align-items:center;justify-content:space-between;font-size:12px;color:#64748b}
.footer-bottom a{color:#64748b;margin-right:16px}

/* --- STICKY CTA --- */
.sticky-cta{position:fixed;bottom:0;left:0;right:0;background:var(--bg-dark);padding:14px 20px;display:flex;align-items:center;justify-content:center;gap:24px;z-index:900;transform:translateY(100%);transition:var(--transition);box-shadow:0 -4px 24px rgba(0,0,0,.2)}
.sticky-cta.visible{transform:translateY(0)}
.sticky-cta.hidden{transform:translateY(100%)!important}
.sticky-cta span{color:#fff;font-size:13px;font-weight:700}
.sticky-cta .btn{padding:10px 24px;background:var(--cta);color:#fff;font-size:13px;border:none;font-weight:700;transition:var(--transition)}
.sticky-cta .btn:hover{background:var(--cta-dark);transform:translateY(-1px)}
.sticky-cta-close{position:absolute;right:10px;top:50%;transform:translateY(-50%);width:24px;height:24px;display:flex;align-items:center;justify-content:center;background:transparent;border:none;border-radius:50%;color:rgba(255,255,255,.4);font-size:11px;cursor:pointer;transition:var(--transition);line-height:1;padding:0}
.sticky-cta-close:hover{color:#fff;background:rgba(255,255,255,.15)}

/* --- BACK TO TOP --- */
.back-to-top{position:fixed;bottom:72px;right:24px;width:44px;height:44px;border-radius:50%;background:var(--text-bright);color:#fff;display:flex;align-items:center;justify-content:center;font-size:18px;cursor:pointer;z-index:900;opacity:0;pointer-events:none;transition:var(--transition);box-shadow:var(--shadow-lg);border:none}
.back-to-top.visible{opacity:.8;pointer-events:all}
.back-to-top:hover{opacity:1;background:var(--cta)}

/* --- ANIMATIONS --- */
.fade-in{opacity:0;transform:translateY(20px);transition:opacity .7s cubic-bezier(.23,1,.32,1),transform .7s cubic-bezier(.23,1,.32,1)}
.fade-in.visible{opacity:1;transform:translateY(0)}
.fade-in-delay-1{transition-delay:.12s}
.fade-in-delay-2{transition-delay:.24s}
.fade-in-delay-3{transition-delay:.36s}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(230,126,34,.15)}50%{box-shadow:0 0 0 12px transparent}}
.pulse{animation:pulse 2.5s infinite}

/* --- BREADCRUMB --- */
.breadcrumb{padding:14px 0;font-size:12px;color:var(--text-dim);letter-spacing:.3px}
.breadcrumb a{color:var(--text-dim)}
.breadcrumb a:hover{color:var(--cta)}
.breadcrumb span{margin:0 6px;opacity:.5}

/* --- PAGE HERO (sub pages) --- */
.page-hero{background:var(--bg-dark);color:#fff;padding:48px 0;text-align:center}
.page-hero h1{color:#fff;font-size:clamp(24px,4vw,36px);margin-bottom:8px}
.page-hero p{color:#cbd5e1;font-size:14px}
.page-hero .section-label{color:#e67e22;border-color:rgba(230,126,34,.3);background:rgba(230,126,34,.1)}

/* --- RESPONSIVE --- */
@media(max-width:1024px){
  .footer-inner{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  :root{--header-h:60px}
  .nav{display:none}
  .burger{display:flex}
  .section{padding:64px 0}
  .footer-inner{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:8px;text-align:center}
}
@media(max-width:480px){
  body{font-size:15px}
  .container{padding:0 16px}
  .btn{padding:12px 28px;font-size:14px}
  .btn-lg{padding:16px 36px;font-size:15px}
}