/* =============================================
   山口デジタルエージェント — 共通スタイル
   全HPページで読み込む。ページ固有のCSSは各HTMLに残す。
   ============================================= */

/* === RESET === */
*{margin:0;padding:0;box-sizing:border-box}

/* === VARIABLES === */
:root{
  --green:#22c55e;--green-dark:#16a34a;--green-light:rgba(34,197,94,.08);
  --black:#000;--gray-950:#0a0a0a;--gray-900:#111;--gray-800:#1a1a1a;
  --gray-700:#262626;--gray-600:#404040;--gray-500:#737373;--gray-400:#a3a3a3;
  --gray-300:#d4d4d4;--gray-200:#e5e5e5;--gray-100:#f5f5f5;--white:#fff;
}

/* === BASE === */
html{scroll-behavior:smooth}
body{font-family:'Inter','Noto Sans JP',sans-serif;background:var(--white);color:var(--black);line-height:1.6;-webkit-font-smoothing:antialiased}

/* === NAV === */
nav{position:fixed;top:0;left:0;right:0;z-index:100;border-bottom:1px solid var(--gray-200);background:rgba(255,255,255,.9);backdrop-filter:blur(16px)}
.nav-inner{max-width:1200px;margin:0 auto;padding:0 32px;height:64px;display:flex;align-items:center;justify-content:space-between}
.logo{font-size:15px;font-weight:800;letter-spacing:-.5px;color:var(--black);text-decoration:none}
.logo span{color:var(--green)}
.nav-links{display:flex;align-items:center;gap:8px}
.nav-links a{font-size:14px;color:var(--gray-600);text-decoration:none;font-weight:500;padding:6px 12px;border-radius:6px;transition:color .15s,background .15s}
.nav-links a:hover,.nav-links a.active{color:var(--black);background:var(--gray-100);font-weight:600}
.nav-cta{background:var(--black)!important;color:var(--white)!important;padding:8px 20px!important;border-radius:8px!important;font-weight:700!important;transition:background .15s!important}
.nav-cta:hover{background:var(--gray-800)!important}

/* === PAGE HERO (内部ページ共通) === */
.page-hero{padding:clamp(120px,16vh,180px) clamp(24px,5vw,80px) clamp(60px,8vh,100px);background:var(--white);border-bottom:1px solid var(--gray-200)}
.page-hero-inner{max-width:1200px;margin:0 auto}
.section-tag{font-size:11px;font-weight:600;color:var(--green);letter-spacing:1.5px;text-transform:uppercase;margin-bottom:20px;display:inline-flex;align-items:center;gap:8px}
.section-tag::before{content:'';width:24px;height:1px;background:var(--green)}
.page-hero h1{font-family:'Shippori Mincho','Noto Sans JP',serif;font-size:clamp(40px,6vw,72px);font-weight:800;letter-spacing:-.03em;color:var(--black);margin-bottom:20px;line-height:1.05}
.page-hero p{font-size:17px;color:var(--gray-500);max-width:560px;line-height:1.8}

/* === 共通コンポーネント === */
.section-title{font-family:'Shippori Mincho','Noto Sans JP',serif;font-size:clamp(28px,4vw,48px);font-weight:700;letter-spacing:-.03em;color:var(--black);margin-bottom:48px;line-height:1.15}
.btn-primary{display:inline-block;background:var(--green);color:var(--white);padding:16px 40px;border-radius:12px;font-size:16px;font-weight:700;text-decoration:none;transition:background .15s}
.btn-primary:hover{background:var(--green-dark)}

/* === CTA === */
.cta-section{background:var(--black);padding:clamp(80px,14vh,160px) clamp(24px,5vw,80px);text-align:center;position:relative;overflow:hidden}
.cta-section::before{content:'';position:absolute;width:600px;height:600px;background:radial-gradient(circle,rgba(34,197,94,.08),transparent 70%);top:50%;left:50%;transform:translate(-50%,-50%);pointer-events:none}
.cta-inner{max-width:640px;margin:0 auto;position:relative;z-index:1}
.cta-title{font-family:'Shippori Mincho','Noto Sans JP',serif;font-size:clamp(28px,4vw,48px);font-weight:800;letter-spacing:-.03em;color:var(--white);margin-bottom:20px;line-height:1.1}
.cta-title span{color:var(--green);white-space:nowrap}
.cta-desc{font-size:16px;color:rgba(255,255,255,.35);margin-bottom:48px;line-height:1.8}

/* === FOOTER === */
footer{background:var(--black);border-top:1px solid #1a1a1a;padding:64px 32px 40px}
.footer-inner{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:48px}
.footer-brand .logo{font-size:16px;font-weight:800;letter-spacing:-.5px;color:var(--white)}
.footer-brand .logo span{color:var(--green)}
.footer-tagline{font-size:13px;color:var(--gray-700);margin-top:12px;line-height:1.7}
.footer-col-title{font-size:11px;font-weight:700;letter-spacing:.8px;text-transform:uppercase;color:var(--gray-600);margin-bottom:20px}
.footer-links{list-style:none;display:flex;flex-direction:column;gap:12px}
.footer-links a{font-size:14px;color:var(--gray-600);text-decoration:none;transition:color .15s}
.footer-links a:hover{color:var(--white)}
.footer-bottom{max-width:1200px;margin:56px auto 0;padding-top:28px;border-top:1px solid #1a1a1a;display:flex;justify-content:space-between;align-items:center}
.footer-copy{font-size:12px;color:#333}

/* === HAMBURGER === */
.hamburger{display:none;background:none;border:none;cursor:pointer;padding:8px;z-index:201}
.hamburger span{display:block;width:22px;height:2px;background:var(--black);margin:5px 0;border-radius:2px;transition:transform .3s,opacity .3s}
.hamburger.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.hamburger.active span:nth-child(2){opacity:0}
.hamburger.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}

/* === MOBILE MENU === */
.mobile-menu{display:none;position:fixed;inset:0;z-index:200;background:var(--white);padding:100px 32px 40px;flex-direction:column;gap:4px;overflow-y:auto}
.mobile-menu.open{display:flex}
.mobile-menu-close{position:absolute;top:24px;right:24px;background:none;border:none;cursor:pointer;width:40px;height:40px;display:flex;align-items:center;justify-content:center}
.mobile-menu-close::before,.mobile-menu-close::after{content:'';position:absolute;width:24px;height:2px;background:var(--black);border-radius:2px}
.mobile-menu-close::before{transform:rotate(45deg)}
.mobile-menu-close::after{transform:rotate(-45deg)}
.mobile-menu a{font-size:20px;font-weight:600;color:var(--black);text-decoration:none;padding:16px 0;border-bottom:1px solid var(--gray-200);transition:color .15s;position:relative;z-index:1}
.mobile-menu a:hover{color:var(--green)}
.mobile-menu .mobile-cta{display:block;text-align:center;background:var(--black);color:var(--white);padding:18px;border-radius:12px;font-size:16px;font-weight:700;margin-top:24px;border-bottom:none}

/* === GRAIN TEXTURE === */
body::after{
  content:'';position:fixed;inset:0;z-index:9999;pointer-events:none;opacity:.035;
  background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-repeat:repeat;background-size:256px 256px;
}

/* === BUTTONS === */
.btn-secondary{display:inline-block;padding:17px 40px;border-radius:12px;font-size:16px;font-weight:600;text-decoration:none;border:1.5px solid var(--gray-300);color:var(--black);transition:border-color .15s,background .15s}
.btn-secondary:hover{border-color:var(--gray-500);background:var(--gray-100)}

/* === CTA FORM (index, pricing共通) === */
.cta-form{display:flex;gap:8px;justify-content:center;max-width:480px;margin:0 auto}
.cta-input{flex:1;padding:18px 20px;border-radius:12px;border:1px solid #333;background:#111;color:var(--white);font-size:15px;outline:none;transition:border-color .15s}
.cta-input:focus{border-color:var(--green)}
.cta-input::placeholder{color:var(--gray-600)}
.cta-btn{background:var(--green);color:var(--white);padding:18px 32px;border-radius:12px;border:none;font-size:15px;font-weight:700;cursor:pointer;white-space:nowrap;transition:background .15s}
.cta-btn:hover{background:var(--green-dark)}
.cta-note{font-size:12px;color:var(--gray-600);margin-top:16px}

/* === CTA ACTIONS (services, portfolio, about共通) === */
.cta-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.cta-actions .btn-primary{background:var(--green);color:var(--black);padding:18px 44px;border-radius:999px;font-size:16px;font-weight:700;text-decoration:none;transition:background .15s,transform .1s}
.cta-actions .btn-primary:hover{background:#4ade80;transform:translateY(-1px)}
.cta-actions .btn-secondary{border-color:#333;color:var(--white);padding:18px 44px;border-radius:999px}
.cta-actions .btn-secondary:hover{border-color:#555;background:rgba(255,255,255,.05)}

/* === SCROLL REVEAL === */
.reveal{opacity:0;transform:translateY(32px);transition:opacity .6s ease,transform .6s ease}
.reveal-left{opacity:0;transform:translateX(-48px);transition:opacity .6s ease,transform .6s ease}
.reveal-right{opacity:0;transform:translateX(48px);transition:opacity .6s ease,transform .6s ease}
.reveal-scale{opacity:0;transform:scale(.94);transition:opacity .6s ease,transform .6s ease}
.reveal.visible,.reveal-left.visible,.reveal-right.visible,.reveal-scale.visible{opacity:1;transform:none}

/* === FAQ (services, pricing, contact共通) === */
.faq-section{padding:clamp(80px,12vh,140px) clamp(24px,5vw,80px);background:var(--white)}
.faq-inner{max-width:800px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--gray-200);padding:28px 0;cursor:pointer}
.faq-q{font-size:17px;font-weight:600;color:var(--black);display:flex;justify-content:space-between;align-items:center;gap:16px}
.faq-q::after{content:'+';font-size:24px;color:var(--gray-400);font-weight:300;transition:transform .3s}
.faq-item.open .faq-q::after{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease,padding .3s ease}
.faq-item.open .faq-a{max-height:500px;padding-top:16px}
.faq-a p{font-size:15px;color:var(--gray-500);line-height:1.85}

/* === MEDIA QUERIES (共通) === */
@media(max-width:768px){
  .nav-links{display:none}
  .hamburger{display:block}
  .footer-inner{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column;gap:8px;text-align:center}
  .cta-form{flex-direction:column}
  .cta-actions{flex-direction:column;align-items:center}
}