/* ============================================
   株式会社ステリーナ コーポレートサイト 共通CSS
   Palette: Royal Blue #1E4E8C / Night #070E26 /
            Ice #CADCFC / Gold #C9A84C
   ============================================ */
:root{
  --navy:#1E4E8C;
  --navy-deep:#12305C;
  --night:#070E26;
  --ice:#CADCFC;
  --ice-soft:#EDF3FE;
  --gold:#C9A84C;
  --gold-soft:#E5D5A4;
  --white:#FFFFFF;
  --text:#2a2f45;
  --muted:#6b7290;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  font-family:'Noto Sans JP',sans-serif;
  color:var(--text);
  background:var(--white);
  line-height:1.8;
}
img{max-width:100%;height:auto;}
.en-label{
  font-family:'Montserrat',sans-serif;
  font-size:0.78rem;
  letter-spacing:0.35em;
  color:var(--gold);
  font-weight:600;
  text-transform:uppercase;
  display:flex;
  align-items:center;
  gap:0.6em;
}
.en-label svg{flex-shrink:0;}
.section-title{
  font-size:clamp(1.5rem,3vw,2.1rem);
  font-weight:900;
  color:var(--navy);
  margin-top:0.4em;
  line-height:1.4;
}
.container{max-width:1080px;margin:0 auto;padding:0 24px;}
section{padding:88px 0;}

/* ===== Header ===== */
header{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,0.92);
  backdrop-filter:blur(8px);
  border-bottom:1px solid #eceef6;
}
.header-inner{
  max-width:1080px;margin:0 auto;padding:14px 24px;
  display:flex;align-items:center;justify-content:space-between;
}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;}
.logo-mark{width:36px;height:36px;}
.logo-text{font-weight:900;color:var(--navy);font-size:1.05rem;letter-spacing:0.05em;}
.logo-text small{display:block;font-family:'Montserrat',sans-serif;font-weight:600;font-size:0.55rem;letter-spacing:0.28em;color:var(--muted);}
nav{display:flex;align-items:center;gap:28px;}
nav a{
  text-decoration:none;color:var(--navy);font-size:0.9rem;font-weight:500;
  padding:4px 0;border-bottom:2px solid transparent;transition:.2s;
}
nav a:hover,nav a.active{border-bottom-color:var(--gold);}
.btn{
  display:inline-block;background:var(--gold);color:var(--navy-deep);
  font-weight:700;text-decoration:none;border-radius:999px;
  padding:10px 26px;font-size:0.9rem;cursor:pointer;border:none;
  transition:.2s;box-shadow:0 4px 14px rgba(201,168,76,.35);
}
.btn:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(201,168,76,.45);}
.btn.large{padding:14px 44px;font-size:1rem;}
nav a.btn{border-bottom:none;color:var(--navy-deep);}

/* ===== Hero (満天の星空) ===== */
.hero{
  background:
    linear-gradient(180deg, rgba(7,14,38,.62) 0%, rgba(7,14,38,.38) 45%, rgba(10,20,48,.72) 100%),
    url("../images/hero-sky.jpg") center 30%/cover no-repeat,
    linear-gradient(180deg, var(--night) 0%, #0E1D42 55%, #1B356B 100%);
  color:var(--white);
  padding:120px 0 130px;
  position:relative;overflow:hidden;
}
.hero .sky{position:absolute;inset:0;pointer-events:none;}
.hero .sky .star{
  position:absolute;background:#fff;border-radius:50%;
  animation:twinkle 3.2s ease-in-out infinite;
}
@keyframes twinkle{0%,100%{opacity:.25;}50%{opacity:1;}}
.hero h1{
  font-size:clamp(1.9rem,4.6vw,3.2rem);
  font-weight:900;letter-spacing:0.08em;line-height:1.5;
  margin:0.6em 0 1em;
  text-shadow:0 2px 24px rgba(7,14,38,.6);
}
.hero h1.en-title{
  font-family:'Montserrat','Noto Sans JP',sans-serif;
  font-size:clamp(2.3rem,5.4vw,4rem);
  letter-spacing:0.03em;line-height:1.25;
  margin:0.5em 0 0.3em;
}
.jp-tagline{
  color:var(--gold-soft);
  font-size:1.02rem;font-weight:700;letter-spacing:0.14em;
  margin-bottom:2.4em !important;
}
.hero p{max-width:680px;color:#d9e2f7;font-size:0.98rem;margin-bottom:1.6em;text-shadow:0 1px 12px rgba(7,14,38,.5);}
.page-hero{
  background:var(--navy);color:var(--white);
  padding:80px 0 64px;position:relative;overflow:hidden;
}
.page-hero h1{font-size:clamp(1.8rem,4vw,2.6rem);font-weight:900;margin-top:0.4em;letter-spacing:0.04em;}

/* ===== Cards ===== */
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:44px;}
.grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin-top:44px;}
.card{
  background:var(--white);border-radius:16px;padding:34px 28px;
  box-shadow:0 6px 24px rgba(18,48,92,.08);
  border:1px solid #eef1f9;
}
.card .icon{
  width:52px;height:52px;border-radius:50%;
  background:var(--ice-soft);display:flex;align-items:center;justify-content:center;
  margin-bottom:18px;
}
.card h3{color:var(--navy);font-size:1.08rem;font-weight:700;margin-bottom:0.5em;}
.card p{font-size:0.9rem;color:var(--muted);}
.num{
  font-family:'Montserrat',sans-serif;font-weight:700;
  color:var(--gold);font-size:0.9rem;letter-spacing:0.2em;margin-bottom:10px;
}

/* ===== Strength / tinted section ===== */
.strength{background:var(--ice-soft);}
.cross-row{display:grid;grid-template-columns:1fr 40px 1fr 40px 1fr;align-items:stretch;gap:0;margin-top:44px;}
.cross{display:flex;align-items:center;justify-content:center;font-size:1.6rem;font-weight:900;color:var(--gold);font-family:'Montserrat',sans-serif;}
.closing{
  margin-top:44px;background:var(--navy);color:#e8edfb;border-radius:16px;
  padding:30px 36px;display:flex;gap:18px;align-items:flex-start;
  font-size:0.96rem;
}
.closing strong{color:var(--gold-soft);}
.closing .star-badge{flex-shrink:0;margin-top:4px;}

/* ===== Digest ===== */
.digest-card{
  background:var(--navy);color:var(--white);border-radius:16px;padding:36px 30px;
  position:relative;overflow:hidden;transition:.25s;border:none;text-align:left;
  display:block;text-decoration:none;
}
.digest-card:hover{transform:translateY(-4px);box-shadow:0 14px 30px rgba(18,48,92,.28);}
.digest-card .en-label{color:var(--gold-soft);}
.digest-card h3{font-size:1.2rem;font-weight:700;margin:0.6em 0 0.5em;color:#fff;}
.digest-card p{font-size:0.88rem;color:#c6d1ee;}
.digest-card .arrow{position:absolute;right:26px;bottom:22px;color:var(--gold);font-family:'Montserrat',sans-serif;font-size:0.8rem;letter-spacing:0.15em;}
.support-mini{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:20px;}
.mini-card{
  background:var(--white);border:1px solid #e6ebf7;border-radius:12px;
  padding:18px 20px;font-size:0.85rem;
}
.mini-card b{color:var(--navy);display:block;font-size:0.92rem;margin-bottom:2px;}
.mini-card span{color:var(--muted);font-size:0.8rem;}

/* ===== CTA ===== */
.cta{
  background:
    radial-gradient(ellipse 50% 60% at 85% 20%, rgba(201,168,76,0.14), transparent),
    linear-gradient(180deg, var(--navy-deep), var(--night));
  color:var(--white);text-align:center;padding:96px 0;position:relative;overflow:hidden;
}
.cta h2{font-size:clamp(1.4rem,3vw,2rem);font-weight:900;margin-bottom:0.6em;}
.cta p{color:#ccd6f0;margin-bottom:2em;}

/* ===== Services page ===== */
.biz-block{margin-top:52px;}
.biz-block:first-of-type{margin-top:0;}
.biz-head{display:flex;align-items:baseline;gap:16px;flex-wrap:wrap;}
.biz-tag{
  font-family:'Montserrat',sans-serif;font-weight:700;font-size:0.78rem;
  letter-spacing:0.25em;color:var(--white);background:var(--navy);
  border-radius:999px;padding:6px 18px;
}
.biz-block h3{font-size:1.5rem;font-weight:900;color:var(--navy);}
.biz-lead{margin-top:14px;color:var(--muted);max-width:760px;}
.service-list{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:28px;}
.target-box{
  margin-top:26px;background:var(--ice-soft);border-radius:14px;padding:26px 30px;
  border-left:4px solid var(--gold);
}
.target-box h4{color:var(--navy);font-size:0.98rem;margin-bottom:10px;}
.target-box ul{list-style:none;}
.target-box li{
  padding-left:1.5em;position:relative;font-size:0.9rem;color:var(--text);margin:6px 0;
}
.target-box li::before{content:"✦";color:var(--gold);position:absolute;left:0;}

/* ===== About page ===== */
.profile-wrap{display:grid;grid-template-columns:300px 1fr;gap:40px;margin-top:44px;align-items:start;}
.profile-card{
  background:
    linear-gradient(180deg, rgba(18,48,92,.78), rgba(7,14,38,.86)),
    url("../images/hero-sky.jpg") center/cover no-repeat;
  color:var(--white);border-radius:16px;padding:42px 28px;text-align:center;
}
.profile-card .assoc{font-size:0.78rem;color:#c6d1ee;margin-top:10px;line-height:1.6;}
.profile-bio{margin-top:4px;margin-bottom:24px;}
.profile-bio p{font-size:0.93rem;margin-bottom:0.9em;}
.profile-avatar{
  width:160px;height:160px;border-radius:50%;background:var(--ice-soft);
  margin:0 auto 18px;display:flex;align-items:center;justify-content:center;
  overflow:hidden;border:3px solid rgba(202,220,252,.5);
}
.profile-avatar img{width:100%;height:100%;object-fit:cover;border-radius:50%;}
.profile-card .role{font-size:0.8rem;color:var(--gold-soft);letter-spacing:0.15em;}
.profile-card .name{font-size:1.4rem;font-weight:900;margin-top:4px;}
.stat-row{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:26px;}
.stat{
  background:var(--ice-soft);border-radius:14px;padding:22px;text-align:center;
}
.stat .big{
  font-family:'Montserrat',sans-serif;font-weight:700;font-size:1.9rem;color:var(--gold);
  line-height:1.2;
}
.stat .big small{font-size:0.95rem;color:var(--navy);font-weight:700;}
.stat .label{font-size:0.8rem;color:var(--muted);margin-top:4px;}
.career-list{list-style:none;}
.career-list li{
  padding:12px 0 12px 1.8em;position:relative;border-bottom:1px dashed #dfe4f2;font-size:0.94rem;
}
.career-list li::before{content:"✦";color:var(--gold);position:absolute;left:0.3em;}
table.company{
  width:100%;border-collapse:collapse;margin-top:36px;background:var(--white);
  border-radius:14px;overflow:hidden;box-shadow:0 4px 16px rgba(18,48,92,.06);
}
table.company th,table.company td{
  text-align:left;padding:16px 22px;font-size:0.92rem;border-bottom:1px solid #eef1f9;
}
table.company th{background:var(--ice-soft);color:var(--navy);width:160px;font-weight:700;}

/* ===== Partnership ===== */
.future-box{
  margin-top:48px;background:var(--ice-soft);border-radius:16px;padding:32px 36px;
  display:flex;gap:20px;align-items:flex-start;
}
.future-box b{color:var(--navy);}
.future-box p{font-size:0.93rem;color:var(--text);}
.form-wrap{
  max-width:640px;margin:36px auto 0;
  background:rgba(255,255,255,0.06);border:1px solid rgba(202,220,252,0.25);
  border-radius:16px;padding:24px;
}
.form-wrap iframe{width:100%;border:none;border-radius:10px;background:#fff;min-height:640px;}
.form-placeholder{
  background:rgba(255,255,255,0.08);border:2px dashed rgba(202,220,252,0.4);
  border-radius:10px;padding:48px 24px;text-align:center;color:#ccd6f0;font-size:0.9rem;
}
.form-note{font-size:0.75rem;color:#9fb0d8;margin-top:12px;text-align:center;}

/* ===== Footer ===== */
footer{background:var(--night);color:#aab6da;padding:44px 0;font-size:0.82rem;}
.footer-inner{
  max-width:1080px;margin:0 auto;padding:0 24px;
  display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px;
}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;}
footer nav{gap:18px;}
footer nav a{color:#aab6da;font-size:0.8rem;}
footer nav a:hover{color:#fff;border-bottom-color:transparent;}

/* ===== Responsive ===== */
@media(max-width:820px){
  .grid3,.service-list,.support-mini{grid-template-columns:1fr;}
  .grid2,.stat-row{grid-template-columns:1fr;}
  .cross-row{grid-template-columns:1fr;}
  .cross{padding:6px 0;}
  .profile-wrap{grid-template-columns:1fr;}
  nav{gap:14px;flex-wrap:wrap;}
  nav a{font-size:0.8rem;}
  .header-inner{flex-wrap:wrap;gap:10px;}
  section{padding:64px 0;}
  .hero{padding:88px 0 96px;}
}

/* ===== News ===== */
.news-list{margin-top:36px;}
.news-item{
  display:flex;gap:20px;align-items:baseline;
  padding:20px 6px;border-bottom:1px solid #e6ebf7;
  text-decoration:none;transition:.2s;
}
.news-item:hover{background:var(--ice-soft);}
.news-date{
  font-family:'Montserrat',sans-serif;font-weight:600;
  color:var(--muted);font-size:0.85rem;white-space:nowrap;letter-spacing:0.05em;
}
.news-cat{
  font-size:0.7rem;font-weight:700;color:var(--navy);
  background:var(--ice-soft);border:1px solid var(--ice);
  border-radius:999px;padding:2px 14px;white-space:nowrap;
}
.news-cat.udemy{background:#FDF6E5;border-color:var(--gold-soft);color:#8a6d1f;}
.news-cat.release{background:var(--navy);border-color:var(--navy);color:#fff;}
.news-title{color:var(--text);font-size:0.95rem;line-height:1.7;}
.news-more{text-align:right;margin-top:18px;}
.news-more a{
  color:var(--navy);font-weight:700;font-size:0.88rem;text-decoration:none;
  border-bottom:2px solid var(--gold);padding-bottom:2px;
}
@media(max-width:820px){
  .news-item{flex-wrap:wrap;gap:10px;}
}

/* ===== News article ===== */
.article{max-width:760px;margin:0 auto;}
.article-meta{display:flex;gap:14px;align-items:center;flex-wrap:wrap;margin-bottom:6px;}
.article h1{font-size:clamp(1.4rem,3vw,1.9rem);font-weight:900;color:var(--navy);line-height:1.5;margin:10px 0 28px;}
.article-body p{margin-bottom:1.4em;font-size:0.96rem;}
.article-back{margin-top:44px;}
.article-back a{color:var(--navy);font-weight:700;font-size:0.88rem;text-decoration:none;border-bottom:2px solid var(--gold);padding-bottom:2px;}

/* ===== Message page ===== */
.message-wrap{display:grid;grid-template-columns:300px 1fr;gap:48px;align-items:start;margin-top:44px;}
.message-photo img{border-radius:16px;box-shadow:0 10px 30px rgba(18,48,92,.18);}
.message-photo .caption{text-align:center;margin-top:14px;font-size:0.85rem;color:var(--muted);}
.message-photo .caption b{display:block;color:var(--navy);font-size:1.05rem;}
.message-title{
  font-size:clamp(1.3rem,2.6vw,1.7rem);font-weight:900;color:var(--navy);
  line-height:1.6;margin-bottom:28px;
}
.message-body p{margin-bottom:1.5em;font-size:0.96rem;}
.message-sign{text-align:right;margin-top:40px;font-weight:700;color:var(--navy);line-height:1.7;}
.message-sign small{display:block;font-weight:400;color:var(--muted);font-size:0.8rem;}
@media(max-width:820px){
  .message-wrap{grid-template-columns:1fr;}
  .message-photo{max-width:260px;margin:0 auto;}
}

/* ===== Policy pages ===== */
.article h2{
  font-size:1.12rem;color:var(--navy);font-weight:700;
  margin:2.2em 0 0.6em;padding-left:0.8em;border-left:4px solid var(--gold);
}
.article ul{margin:0.4em 0 1.2em 1.5em;}
.article ul li{font-size:0.94rem;margin:4px 0;}
.policy-date{text-align:right;color:var(--muted);font-size:0.85rem;margin-top:36px;}