/* ==========================================================
   QREA Inc. — Premium Corporate Site
   Design: Minimal, white-dominant, editorial, generous spacing
========================================================== */

/* ---------- Reset & Variables ---------- */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}

:root{
  --dark:#383838;
  --dark2:#444;
  --accent:#36b5a0;
  --accent-d:#2d9e8c;
  --text:#333;
  --mute:#888;
  --light:#f6f6f8;
  --white:#fff;
  --border:#e5e5e5;
  --r:8px;
  --ease:cubic-bezier(.4,0,.2,1);
}

html{scroll-behavior:smooth;font-size:16px}
body{font-family:'Noto Sans JP','Inter',-apple-system,sans-serif;color:var(--text);line-height:1.9;background:var(--white);overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
.container{max-width:1100px;margin:0 auto;padding:0 28px;position:relative;z-index:1}
.pc{display:inline}

/* ---------- Loader ---------- */
.loader{position:fixed;inset:0;z-index:9999;background:var(--white);display:flex;align-items:center;justify-content:center;transition:opacity .6s,visibility .6s}
.loader.hidden{opacity:0;visibility:hidden}
.loader-logo{height:44px;animation:pulse 1.4s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.3}}

/* ---------- Header ---------- */
/* ヘッダーは常に白背景で固定表示 */
.header{position:fixed;top:0;left:0;width:100%;z-index:100;padding:1rem 0;background:rgba(255,255,255,.95);backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);transition:.35s var(--ease)}
/* スクロール時は影をつけて区切り感を出す */
.header.scrolled{box-shadow:0 1px 0 var(--border)}
.header-inner{max-width:1100px;margin:0 auto;padding:0 28px;display:flex;justify-content:space-between;align-items:center}

/* ロゴは常にオリジナルカラーで表示 */
.logo-img{height:30px;transition:filter .35s var(--ease)}

/* --- デスクトップナビ --- */
.nav-desktop .nav-list{display:flex;list-style:none;gap:2.4rem;align-items:center}
.nav-link{font-size:.82rem;font-weight:600;letter-spacing:1.5px;color:var(--text);transition:color .3s}
.nav-link:hover{color:var(--accent)}
.nav-cta{background:var(--accent);color:var(--white) !important;padding:.5rem 1.6rem;border-radius:60px;font-size:.8rem;letter-spacing:1px}
.nav-cta:hover{background:var(--accent-d)}

/* --- ハンバーガーボタン（デフォルトは非表示） --- */
.hamburger{display:none;flex-direction:column;gap:6px;background:none;border:none;cursor:pointer;padding:4px;z-index:201}
.hamburger span{display:block;width:26px;height:2px;background:var(--dark);border-radius:2px;transition:.35s var(--ease)}
.hamburger.active span{background:var(--white)}
.hamburger.active span:first-child{transform:rotate(45deg) translate(5.5px,5.5px)}
.hamburger.active span:last-child{transform:rotate(-45deg) translate(5.5px,-5.5px)}

/* --- モバイルナビ（ヘッダーの外に配置された全画面オーバーレイ） --- */
.mobile-nav{
  display:none; /* デスクトップでは非表示 */
  position:fixed;
  top:0;left:0;
  width:100%;height:100%;
  background:rgba(56,56,56,.97);
  backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
  z-index:200;
  align-items:center;
  justify-content:center;
  opacity:0;
  visibility:hidden;
  transition:opacity .35s var(--ease),visibility .35s var(--ease);
}
.mobile-nav.open{opacity:1;visibility:visible}
.mobile-nav-list{list-style:none;display:flex;flex-direction:column;align-items:center;gap:2.8rem;padding:0}
.mobile-nav-link{
  font-size:1.2rem;
  font-weight:600;
  letter-spacing:3px;
  color:var(--white);
  text-transform:uppercase;
  transition:color .3s;
}
.mobile-nav-link:hover{color:var(--accent)}
.mobile-nav-cta{
  display:inline-block;
  background:var(--accent);
  color:var(--white) !important;
  padding:.8rem 2.4rem;
  border-radius:60px;
  font-size:1rem;
  letter-spacing:2px;
  margin-top:.5rem;
  transition:background .3s;
}
.mobile-nav-cta:hover{background:var(--accent-d)}

/* ---------- Section Background Text（各セクション背景の大きな英字） ---------- */
.section-bg-text{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);z-index:0;pointer-events:none;white-space:nowrap;overflow:hidden;width:100%}
.section-bg-text span{
  display:block;
  text-align:center;
  font-size:clamp(7rem,18vw,16rem);
  font-weight:900;
  letter-spacing:.08em;
  color:rgba(0,0,0,.025);
  line-height:1;
  user-select:none;
}
/* ダークセクション内では白透過 */
.mission .section-bg-text span,
.cta .section-bg-text span{color:rgba(255,255,255,.04)}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:10px;padding:.95rem 2.6rem;border-radius:60px;font-size:.88rem;font-weight:600;letter-spacing:.5px;cursor:pointer;border:none;transition:.35s var(--ease);font-family:inherit;background:var(--dark);color:var(--white)}
.btn:hover{transform:translateY(-2px);box-shadow:0 12px 40px rgba(0,0,0,.12)}
.btn--ghost{background:transparent;border:1.5px solid rgba(255,255,255,.4);color:var(--white)}
.btn--ghost:hover{border-color:var(--white);background:rgba(255,255,255,.12)}
.btn--white{background:var(--white);color:var(--dark)}
.btn--white:hover{box-shadow:0 12px 40px rgba(255,255,255,.25)}
.btn--dark{background:var(--dark);color:var(--white)}
.btn--dark:hover{background:#2d2d2d;box-shadow:0 12px 40px rgba(0,0,0,.25)}
.btn--full{width:100%;justify-content:center;background:var(--dark);color:var(--white);padding:1rem}
.btn--full:hover{background:#2d2d2d}

/* ---------- Hero ---------- */
.hero{min-height:100vh;position:relative;overflow:hidden;display:flex;align-items:center;background:url('../images/hero.jpeg') center center / cover no-repeat}

/* ===== ドットオーバーレイ（3層構成：密度高め、ドットサイズで背景の見え方を制御）===== */
/* 共通：グリッド間隔 4px（高密度） */
.hero-dots{position:absolute;inset:0;z-index:0;pointer-events:none}

/* 左側：やや大きめの丸ドット（密度が高いので背景がほぼ見えない） */
.hero-dots--large{
  background:radial-gradient(circle, #36b5a0 1.6px, transparent 1.6px);
  background-size:4px 4px;
  -webkit-mask-image:linear-gradient(to right, #000 0%, #000 25%, transparent 50%);
  mask-image:linear-gradient(to right, #000 0%, #000 25%, transparent 50%);
}

/* 中央：中くらいの丸ドット（背景がちらちら見え始める） */
.hero-dots--medium{
  background:radial-gradient(circle, #36b5a0 1px, transparent 1px);
  background-size:4px 4px;
  -webkit-mask-image:linear-gradient(to right, transparent 20%, #000 40%, #000 50%, transparent 70%);
  mask-image:linear-gradient(to right, transparent 20%, #000 40%, #000 50%, transparent 70%);
}

/* 右側：小さな丸ドット（右1/4はほぼ消える） */
.hero-dots--small{
  background:radial-gradient(circle, #36b5a0 .4px, transparent .4px);
  background-size:4px 4px;
  -webkit-mask-image:linear-gradient(to right, transparent 50%, #000 65%, transparent 75%);
  mask-image:linear-gradient(to right, transparent 50%, #000 65%, transparent 75%);
}

/* 背景で流れるテキスト */
.hero-bg-text{position:absolute;inset:0;z-index:1;overflow:hidden;pointer-events:none;opacity:.7}
.hero-bg-track{display:flex;white-space:nowrap;position:absolute;left:0}
.hero-bg-track span{
  font-size:clamp(8rem,20vw,18rem);
  font-weight:900;
  letter-spacing:.04em;
  color:rgba(255,255,255,.06);
  padding:0 .25em;
  -webkit-text-stroke:1px rgba(255,255,255,.03);
  user-select:none;
  text-transform:uppercase;
}
.hero-bg-track--1{top:5%;animation:marqueeLeft 45s linear infinite}
.hero-bg-track--2{top:40%;animation:marqueeRight 50s linear infinite}
.hero-bg-track--3{top:75%;animation:marqueeLeft 40s linear infinite}

@keyframes marqueeLeft{
  0%{transform:translateX(0)}
  100%{transform:translateX(-50%)}
}
@keyframes marqueeRight{
  0%{transform:translateX(-50%)}
  100%{transform:translateX(0)}
}
/* ヒーロー内レイアウト：サイト共通のコンテナ幅内で左寄せ */
.hero-inner{width:70%;max-width:1600px;margin:0 auto;padding:0;position:relative;z-index:2;text-align:left}
.hero-text{padding:10rem 0 6rem;max-width:560px}
.hero-label{font-size:.76rem;font-weight:700;letter-spacing:5px;color:var(--white);opacity:.85;margin-bottom:2rem;text-shadow:0 0 20px rgba(54,181,160,.5)}
.hero-title{font-size:clamp(2.4rem,5vw,3.8rem);font-weight:900;color:var(--white);line-height:1.25;margin-bottom:1.6rem;letter-spacing:-1px;text-shadow:0 0 30px rgba(54,181,160,.6),0 0 60px rgba(54,181,160,.3),0 4px 20px rgba(0,60,80,.3)}
.hero-desc{font-size:clamp(.9rem,1.2vw,1.05rem);color:rgba(255,255,255,.9);line-height:2;margin-bottom:2.8rem;text-shadow:0 0 20px rgba(54,181,160,.5),0 2px 15px rgba(0,60,80,.25)}
.hero-actions{display:flex;gap:1rem;flex-wrap:wrap}
.hero-actions .btn{box-shadow:0 0 24px rgba(54,181,160,.4),0 0 50px rgba(54,181,160,.15)}
.hero-actions .btn:hover{box-shadow:0 0 32px rgba(54,181,160,.55),0 0 60px rgba(54,181,160,.25)}
.hero-scroll{position:absolute;bottom:2.5rem;left:50%;transform:translateX(-50%);z-index:10;display:flex;flex-direction:column;align-items:center;gap:10px}
.hero-scroll span{font-size:.65rem;letter-spacing:4px;color:rgba(255,255,255,.8);font-weight:600}
.hero-scroll-line{width:1px;height:48px;background:rgba(255,255,255,.2);position:relative;overflow:hidden}
.hero-scroll-line::after{content:'';position:absolute;top:-100%;left:0;width:100%;height:100%;background:var(--white);animation:scrollAnim 2.2s ease-in-out infinite}
@keyframes scrollAnim{to{top:100%}}

/* ---------- Section labels ---------- */
.section-label{display:flex;align-items:center;gap:16px;margin-bottom:1rem}
.section-label__en{font-size:.72rem;font-weight:700;letter-spacing:5px;color:var(--accent);text-transform:uppercase}
.section-label__line{flex:1;height:1px;background:var(--border)}
.section-heading{font-size:clamp(1.8rem,3.5vw,2.6rem);font-weight:900;letter-spacing:-0.5px;color:var(--dark);margin-bottom:.6rem;line-height:1.3}
.section-sub{color:var(--mute);font-size:.92rem;margin-bottom:3.5rem;max-width:560px}

/* ---------- Mission ---------- */
.mission{padding:7rem 0;background:var(--dark);text-align:center;position:relative;overflow:hidden}
.mission::before{content:'';position:absolute;top:50%;left:50%;width:600px;height:600px;background:radial-gradient(circle,rgba(54,181,160,.15),transparent 70%);border-radius:50%;transform:translate(-50%,-50%)}
.mission-en{font-size:.72rem;font-weight:700;letter-spacing:5px;color:var(--accent);margin-bottom:2rem;position:relative}
.mission-title{font-size:clamp(1.8rem,3.5vw,2.6rem);font-weight:900;color:var(--white);line-height:1.45;margin-bottom:1.5rem;position:relative}
.mission-body{font-size:.95rem;color:rgba(255,255,255,.55);max-width:540px;margin:0 auto;position:relative;line-height:2}

/* ---------- About ---------- */
.about{padding:8rem 0;position:relative;overflow:hidden}
.about-grid{display:grid;grid-template-columns:1fr 1.15fr;gap:4rem;margin-top:3.5rem;align-items:stretch}
.about-photo{border-radius:var(--r);overflow:hidden}
.about-photo img{width:100%;height:100%;object-fit:cover}
.about-text{font-size:.92rem;color:var(--mute);margin-bottom:1.2rem;line-height:2.1}
.about-info{margin-top:2.4rem;border-top:1px solid var(--border)}
.about-info__row{display:grid;grid-template-columns:110px 1fr;padding:1.1rem 0;border-bottom:1px solid var(--border);font-size:.88rem}
.about-info__row dt{font-weight:600;color:var(--dark)}
.about-info__row dd{color:var(--mute);line-height:1.8}

/* ---------- Services ---------- */
.services{padding:8rem 0;background:var(--light);position:relative;overflow:hidden}
.srv-list{display:flex;flex-direction:column;gap:6rem;margin-top:1rem}
.srv{display:grid;grid-template-columns:1fr 1fr;gap:4rem;align-items:center}
.srv--reverse{direction:rtl}
.srv--reverse>*{direction:ltr}
.srv-img{border-radius:var(--r);overflow:hidden;aspect-ratio:4/3}
.srv-img img{width:100%;height:100%;object-fit:cover;transition:transform .8s var(--ease)}
.srv:hover .srv-img img{transform:scale(1.04)}
.srv-num{font-size:4rem;font-weight:900;color:rgba(54,181,160,.15);line-height:1;letter-spacing:-2px}
.srv-en{font-size:.68rem;font-weight:700;letter-spacing:4px;color:var(--accent);margin:.8rem 0;line-height:1.6;text-transform:uppercase}
.srv-title{font-size:1.4rem;font-weight:700;color:var(--dark);margin-bottom:.8rem}
.srv-text{font-size:.88rem;color:var(--mute);line-height:2;margin-bottom:1.2rem}
.srv-tags{list-style:none;display:flex;gap:8px;flex-wrap:wrap}
.srv-tags li{font-size:.72rem;font-weight:600;color:var(--accent);background:rgba(54,181,160,.08);padding:4px 14px;border-radius:40px;letter-spacing:.5px}

/* ---------- CTA ---------- */
.cta{position:relative;overflow:hidden}
.cta-inner{position:relative;padding:8rem 0;text-align:center}
.cta-bg{position:absolute;inset:0}
.cta-bg img{width:100%;height:100%;object-fit:cover}
.cta-bg::after{content:'';position:absolute;inset:0;background:rgba(56,56,56,.9)}
.cta-content{position:relative;max-width:580px;margin:0 auto;padding:0 28px}
.cta-en{font-size:.72rem;font-weight:700;letter-spacing:5px;color:rgba(255,255,255,.6);margin-bottom:1.5rem}
.cta-title{font-size:clamp(1.6rem,3vw,2.2rem);font-weight:700;color:var(--white);margin-bottom:1rem;line-height:1.5}
.cta-text{font-size:.92rem;color:rgba(255,255,255,.65);margin-bottom:2.5rem;line-height:1.9}

/* ---------- FAQ ---------- */
.faq{padding:8rem 0;position:relative;overflow:hidden}
.faq-list{max-width:780px;margin:1rem auto 0}
.faq-item{border-bottom:1px solid var(--border)}
.faq-q{width:100%;padding:1.6rem 0;display:flex;justify-content:space-between;align-items:center;background:none;border:none;cursor:pointer;text-align:left;font-size:.95rem;font-weight:600;color:var(--dark);font-family:inherit;gap:1.5rem;transition:color .3s}
.faq-q:hover{color:var(--accent)}
.faq-icon{width:28px;height:28px;flex-shrink:0;position:relative}
.faq-icon::before,.faq-icon::after{content:'';position:absolute;top:50%;left:50%;background:var(--accent);transition:.35s var(--ease)}
.faq-icon::before{width:14px;height:1.5px;transform:translate(-50%,-50%)}
.faq-icon::after{width:1.5px;height:14px;transform:translate(-50%,-50%)}
.faq-item.active .faq-icon::after{transform:translate(-50%,-50%) rotate(90deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .45s var(--ease)}
.faq-item.active .faq-a{max-height:400px}
.faq-a p{padding-bottom:1.6rem;font-size:.88rem;color:var(--mute);line-height:2.1}

/* ---------- Contact ---------- */
.contact{padding:8rem 0;background:var(--light);position:relative;overflow:hidden}
.contact-wrap{max-width:640px;margin:1rem auto 0}
.form{background:var(--white);border-radius:16px;padding:2.8rem;box-shadow:0 2px 40px rgba(0,0,0,.04)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.form-group{margin-bottom:1.4rem}
.form-group label{display:block;font-size:.8rem;font-weight:600;letter-spacing:1px;color:var(--dark);margin-bottom:.5rem;text-transform:uppercase}
.req{color:var(--accent);font-size:.7rem}
.form-group input,.form-group textarea,.form-group select{width:100%;padding:.85rem 1rem;border:1.5px solid var(--border);border-radius:var(--r);font-size:.92rem;font-family:inherit;color:var(--text);transition:.3s var(--ease);background:var(--white)}
.form-group input:focus,.form-group textarea:focus,.form-group select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(54,181,160,.12)}
.form-group textarea{resize:vertical}
.form-group select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 10 10'%3E%3Cpath fill='%23888' d='M5 7L0 2h10z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 1rem center}
.form-done{display:none;text-align:center;padding:4rem 2rem}
.form-done.show{display:block}
.form-done i{font-size:2.6rem;color:var(--accent);margin-bottom:1rem}
.form-done h3{font-size:1.2rem;font-weight:700;color:var(--dark);margin-bottom:.6rem}
.form-done p{color:var(--mute);font-size:.9rem;line-height:1.9}

/* ---------- Footer ---------- */
.footer{background:var(--dark);color:var(--white);padding:5rem 0 0}
.footer-top{display:grid;grid-template-columns:1.4fr 2fr;gap:4rem;padding-bottom:3rem;border-bottom:1px solid rgba(255,255,255,.06)}
.footer-brand-name{font-size:1.2rem;font-weight:700;color:var(--white);letter-spacing:1px;margin-bottom:1rem}
.footer-desc{font-size:.82rem;color:rgba(255,255,255,.4);line-height:1.9;max-width:280px}
.footer-nav{display:grid;grid-template-columns:repeat(3,1fr);gap:2rem}
.footer-col h4{font-size:.72rem;font-weight:700;letter-spacing:3px;color:rgba(255,255,255,.7);margin-bottom:1rem;text-transform:uppercase}
.footer-col ul{list-style:none}
.footer-col li{font-size:.82rem;color:rgba(255,255,255,.4);margin-bottom:.6rem}
.footer-col a{transition:color .3s}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;padding:1.5rem 0;flex-wrap:wrap;gap:1rem}
.footer-bottom small{font-size:.75rem;color:rgba(255,255,255,.25)}
.footer-legal{display:flex;gap:1.5rem}
.footer-legal a{font-size:.75rem;color:rgba(255,255,255,.3);transition:color .3s}
.footer-legal a:hover{color:var(--accent)}

/* ---------- Back to top ---------- */
.totop{position:fixed;bottom:2rem;right:2rem;width:44px;height:44px;border-radius:50%;background:var(--dark);color:var(--white);border:none;cursor:pointer;font-size:.9rem;opacity:0;visibility:hidden;transform:translateY(16px);transition:.35s var(--ease);z-index:90;display:flex;align-items:center;justify-content:center}
.totop.show{opacity:1;visibility:visible;transform:translateY(0)}
.totop:hover{background:var(--accent)}

/* ---------- Scroll animations ---------- */
[data-anim]{opacity:0;transform:translateY(32px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
[data-anim].visible{opacity:1;transform:translateY(0)}

/* ---------- Responsive: tablet (768px以下) ---------- */
@media(max-width:768px){
  .pc{display:none}

  /* --- ヒーロー --- */
  /* モバイルでは縦長の画像に切り替えて、見栄えを良くする */
  .hero{background-image:url('../images/topphone.jpeg')}
  .hero-inner{padding:0 24px;width:90%}
  .hero-text{padding:8rem 0 3rem;max-width:100%}
  .hero-title{font-size:clamp(2rem,5.5vw,2.8rem)}
  .hero-scroll{display:none}
  .hero-bg-track span{font-size:clamp(4.5rem,12vw,8rem)}

  /* --- デスクトップナビを非表示、ハンバーガー＆モバイルナビを表示 --- */
  .nav-desktop{display:none}
  .hamburger{display:flex}
  .mobile-nav{display:flex}

  /* --- セクション --- */
  .about-grid{grid-template-columns:1fr;gap:2.5rem}
  .about-photo img{height:320px}
  .srv{grid-template-columns:1fr;gap:2rem}
  .srv--reverse{direction:ltr}
  .footer-top{grid-template-columns:1fr}
  .footer-nav{grid-template-columns:1fr 1fr}
  .section-heading{font-size:1.8rem}
  .section-bg-text span{font-size:clamp(5rem,14vw,10rem)}
}

/* ---------- Responsive: phone (480px以下) ---------- */
@media(max-width:480px){
  .hero-inner{padding:0 20px;text-align:left}
  .hero-title{font-size:clamp(1.6rem,6.5vw,2.2rem)}
  .hero-text{padding:7rem 0 2rem}
  .hero-desc{font-size:.85rem}
  .hero-actions{flex-direction:column;align-items:flex-start}
  .hero-bg-track span{font-size:clamp(3rem,10vw,5.5rem)}
  .btn{width:100%;justify-content:center}
  .form-row{grid-template-columns:1fr}
  .form{padding:1.8rem}
  .footer-nav{grid-template-columns:1fr}
  .section-heading{font-size:1.5rem}
  .mission-title{font-size:1.5rem}
  .about-info__row{grid-template-columns:1fr;gap:.3rem}
  .section-bg-text span{font-size:clamp(3.5rem,12vw,7rem)}
}