/* SKY INTERNATIONAL — shared styles for English (index.html) and Japanese (ja.html) pages */
:root{
  --blue:#4169e1; --text:#333; --muted:#555; --bg:#fff; --bg-alt:#f4f4f6; --bg-grey:#ecebec;
  --line:#e2e2e8; --card:#fff; --hero-dark:#0b1026;
  --head:"Barlow Condensed","Noto Sans JP",sans-serif;
  --body:"Barlow","Noto Sans JP",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:80px}
body{font-family:var(--body);font-weight:300;color:var(--text);background:var(--bg);line-height:1.9;letter-spacing:.02em}
.ja{font-weight:400;letter-spacing:.04em}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.container{max-width:1080px;margin:0 auto;padding:0 16px}

/* ---------- navigation ---------- */
.logo{position:absolute;top:22px;left:24px;z-index:20;width:210px}
.nav{position:fixed;top:0;left:50%;transform:translateX(-50%);z-index:30;background:#fff;box-shadow:0 2px 12px rgba(0,0,0,.08);display:flex;align-items:center;gap:30px;padding:0 30px;height:84px;font-family:var(--head);font-size:14px;font-weight:500;letter-spacing:.04em;white-space:nowrap}
.ja .nav{font-size:13px;gap:24px}
.nav a:hover{color:var(--blue)}
.nav .lang{display:flex;gap:6px;border-left:1px solid var(--line);padding-left:20px}
.nav .lang a{padding:2px 6px;border-radius:3px}
.nav .lang a.on{background:var(--blue);color:#fff}
.burger{display:none;position:fixed;top:16px;right:16px;z-index:40;width:46px;height:46px;border:0;border-radius:6px;background:#fff;box-shadow:0 2px 10px rgba(0,0,0,.15);font-size:22px;cursor:pointer;color:var(--text)}

/* ---------- hero ---------- */
.hero{position:relative;height:min(92vh,760px);min-height:480px;background:var(--hero-dark) url("assets/hero-world.jpg") center/cover no-repeat;display:flex;align-items:center;justify-content:center;text-align:center;color:#fff;padding:0 16px}
.hero::before{content:"";position:absolute;inset:0;background:rgba(5,10,35,.25)}
.hero-inner{position:relative}
.hero h1{font-family:var(--head);font-style:italic;font-weight:500;font-size:clamp(36px,6.4vw,76px);line-height:1.2;letter-spacing:.01em}
.ja .hero h1{font-style:normal;font-weight:700;font-size:clamp(30px,5vw,56px);line-height:1.4}
.hero .tag{font-family:var(--head);letter-spacing:.2em;font-size:15px;margin-bottom:14px;opacity:.9}
.hero p{max-width:640px;margin:20px auto 0;opacity:.92}
.btn{display:inline-block;margin-top:30px;background:var(--blue);color:#fff;font-family:var(--head);font-weight:600;letter-spacing:.06em;padding:14px 36px;border-radius:3px;transition:opacity .2s}
.btn:hover{opacity:.85}

/* ---------- sections ---------- */
section{padding:90px 0}
.alt{background:var(--bg-alt)}
.grey{background:var(--bg-grey)}
.big{font-family:var(--head);font-weight:500;font-size:clamp(28px,4.4vw,48px);line-height:1.3;text-align:center;color:#222}
.ja .big{font-weight:700;font-size:clamp(24px,3.6vw,38px);line-height:1.5}
.big.left{text-align:left}
.h-blue{font-family:var(--head);font-weight:700;color:var(--blue);font-size:24px;letter-spacing:.03em}
.h-blue::after{content:"";display:block;width:28px;height:1px;background:#999;margin:10px 0 22px}
.ja .h-blue small{display:block;font-size:13px;color:var(--muted);font-weight:500;letter-spacing:.15em}
.lead{color:var(--muted);max-width:820px}

/* split image / text blocks */
.split{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:0}
.split img{width:100%;height:100%;object-fit:cover;min-height:320px}
.split .txt{background:#fff;padding:44px 40px;box-shadow:0 4px 24px rgba(0,0,0,.06)}
.split.overlap .txt{margin-left:-60px;position:relative}
.split.rev .txt{order:-1;box-shadow:none;background:none;padding-left:0}
ul.dots{list-style:none}
ul.dots li::before{content:"▪ ";color:var(--text)}

/* message */
.message{text-align:center}
.message .role{font-family:var(--head);font-size:20px;letter-spacing:.04em}
.message .name{font-family:var(--head);font-size:30px;font-weight:600;margin:4px 0 30px}
.message p{max-width:860px;margin:0 auto 20px}

/* partners */
.partners{display:grid;grid-template-columns:1fr 1.2fr 1fr;gap:24px;align-items:center;margin-top:40px}
.partners h3{font-family:var(--head);color:var(--blue);font-weight:600;font-size:17px;text-align:center}
.partners h3 small{display:block;font-size:13px;font-weight:500}
.circles{display:flex;flex-wrap:wrap;justify-content:center;gap:18px;margin-top:20px}
.circles img{width:96px;height:96px;border-radius:50%;background:#fff;box-shadow:0 4px 16px rgba(0,0,0,.08);object-fit:contain;padding:10px}
.bubble{background:#fff;border-radius:50%;aspect-ratio:1;display:flex;align-items:center;justify-content:center;padding:15%;text-align:center;font-size:15px;box-shadow:0 4px 24px rgba(0,0,0,.05)}
.collab{width:100%;max-width:420px;margin:40px auto 0}

/* process cards */
.step{display:grid;grid-template-columns:260px 1fr;gap:36px;background:#fff;padding:32px;margin-top:24px;box-shadow:0 2px 14px rgba(0,0,0,.05);align-items:start}
.step h3{font-family:var(--head);color:var(--blue);font-weight:700;font-size:23px;margin-bottom:14px}
.chips{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:16px}
.chips span{background:var(--blue);color:#fff;font-family:var(--head);font-weight:600;font-size:14px;padding:9px 18px;letter-spacing:.03em}
.chips.col{flex-direction:column;align-items:flex-start}

/* reference */
.ref{border:4px solid var(--blue);padding:40px;margin-top:40px;background:#fff}
.ref-top{display:grid;grid-template-columns:1fr 240px;gap:30px}
.thumbs{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:20px}
.thumbs p{font-family:var(--head);color:var(--blue);font-weight:600;font-size:14px;line-height:1.5;margin-top:8px}
.gift{display:grid;grid-template-columns:300px 1fr;gap:30px;margin-top:40px;align-items:start}
.gift strong{color:var(--blue);font-weight:500}

/* cards (JP) */
.grid{display:grid;gap:24px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;padding:30px 26px;box-shadow:0 2px 14px rgba(0,0,0,.05);border-top:3px solid var(--blue)}
.card .num{font-family:var(--head);color:var(--blue);font-weight:700;font-size:15px}
.card h3{font-size:18px;margin:6px 0 10px;font-weight:700;color:#222}
.card p{color:var(--muted);font-size:14.5px}
.region{text-align:center}
.region .flag{font-size:32px}
.flow{counter-reset:s;display:grid;grid-template-columns:repeat(5,1fr);gap:12px;list-style:none}
.flow li{background:#fff;padding:22px 14px;text-align:center;font-size:14px;font-weight:500;box-shadow:0 2px 14px rgba(0,0,0,.05)}
.flow li::before{counter-increment:s;content:"STEP " counter(s);display:block;font-family:var(--head);color:var(--blue);font-weight:700;font-size:14px;margin-bottom:4px}

/* company profile */
.profile{background:#fff;padding:40px;box-shadow:0 2px 14px rgba(0,0,0,.05)}
.profile dl{display:grid;grid-template-columns:220px 1fr}
.profile dt,.profile dd{padding:20px 0;border-bottom:1px solid var(--line)}
.profile dt{font-weight:400}
.principles{background:var(--bg-grey);padding:44px 40px;margin-top:40px}
.principles h2{font-family:Helvetica,Arial,"Noto Sans JP",sans-serif;font-weight:700;font-size:clamp(26px,3.4vw,36px);color:#000;margin-bottom:28px}
.principles dl{display:grid;grid-template-columns:140px 1fr;gap:18px 20px;font-family:Helvetica,Arial,"Noto Sans JP",sans-serif;font-size:15px}
.principles dt{font-weight:700}
.principles dd b{display:block;margin-bottom:4px}
.todo{background:#fff3cd;color:#7a5b00;padding:0 6px;border-radius:3px;font-size:13px}

/* contact form */
form{display:grid;gap:16px;max-width:720px}
label{font-size:14px;font-weight:500}
input,select,textarea{width:100%;padding:12px 14px;border:1px solid #ccc;border-radius:3px;font:inherit;background:#fff;color:var(--text);margin-top:6px}
textarea{min-height:140px}
button.submit{background:var(--blue);color:#fff;border:0;border-radius:3px;padding:14px;font-weight:700;font-size:16px;cursor:pointer;font-family:inherit}

.mail{font-weight:500;color:var(--blue);user-select:all}
[hidden]{display:none!important}
.sent{max-width:720px;margin-top:28px;background:#fff;border:1px solid var(--line);padding:24px;display:grid;gap:14px}
.sent textarea{min-height:180px;margin:0}
.sent-btns{display:flex;flex-wrap:wrap;gap:12px}
.sent-btns .submit{flex:1 1 200px;text-align:center;padding:12px}
footer{background:var(--hero-dark);color:#c8cde0;padding:40px 0;text-align:center;font-size:13px}
footer img{width:180px;margin:0 auto 14px}

/* ---------- responsive ---------- */
@media (max-width:1180px){
  .nav{display:none;top:0;left:0;right:0;transform:none;flex-direction:column;height:auto;padding:80px 24px 24px;gap:16px;font-size:16px}
  .nav.open{display:flex}
  .nav .lang{border:0;padding:0}
  .burger{display:block}
  .logo{width:170px;top:20px;left:16px}
}
@media (max-width:980px){
  .split,.partners,.step,.ref-top,.gift{grid-template-columns:1fr}
  .split.overlap .txt{margin:-40px 16px 0}
  .split.rev .txt{order:0;padding:30px 0 0}
  .g3,.g4,.flow{grid-template-columns:1fr 1fr}
  section{padding:64px 0}
}
@media (max-width:560px){
  .g2,.g3,.g4,.flow,.thumbs{grid-template-columns:1fr}
  .profile,.principles,.ref{padding:24px 18px}
  .profile dl,.principles dl{grid-template-columns:1fr}
  .profile dt{border:0;padding-bottom:0;font-weight:700}
  .step{padding:22px}
  .bubble{border-radius:24px;aspect-ratio:auto;padding:24px}
}