/* =========================================================
   ICE FREEDIVING SHIRETOKO — shared stylesheet
   ========================================================= */

:root{
  --navy-950:#050e16;
  --navy-900:#0a1b28;
  --navy-800:#0f2536;
  --navy-700:#173347;
  --ice-100:#eaf6fb;
  --ice-200:#d3ecf5;
  --ice-300:#b3dbea;
  --cyan-400:#5fd0e8;
  --cyan-300:#8fe0f0;
  --amber-400:#ff9a52;
  --amber-500:#ff8135;
  --white:#ffffff;
  --line:rgba(234,246,251,0.14);
  --line-strong:rgba(234,246,251,0.28);
  --shadow:0 20px 50px rgba(3,10,16,0.45);
  --radius-lg:22px;
  --radius-md:14px;
  --radius-sm:8px;
  --maxw:1180px;
  --font-jp:"Noto Sans JP","Noto Sans KR","Noto Sans SC",sans-serif;
  --font-latin:"Inter","Noto Sans JP","Noto Sans KR","Noto Sans SC",sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
html,body{overflow-x:hidden;max-width:100%;}
body{
  margin:0;
  background:var(--navy-950);
  color:var(--ice-100);
  font-family:var(--font-latin);
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  font-feature-settings:"palt";
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
h1,h2,h3,h4{margin:0 0 .5em;font-weight:700;letter-spacing:.01em;}
p{margin:0 0 1em;color:var(--ice-200);}
ul{margin:0;padding:0;}
li{list-style:none;}
button{font-family:inherit;}

.container{
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 24px;
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:.78rem;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--cyan-300);
  font-weight:600;
  margin-bottom:14px;
}
.eyebrow::before{
  content:"";
  width:22px;height:1px;
  background:var(--cyan-300);
  display:inline-block;
}

/* ---------- header / nav ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:1000;
  background:linear-gradient(to bottom, rgba(5,14,22,.88), rgba(5,14,22,0));
  backdrop-filter:blur(2px);
  transition:background .3s ease, box-shadow .3s ease;
}
.site-header.scrolled{
  background:rgba(6,16,24,.92);
  box-shadow:0 1px 0 var(--line);
  backdrop-filter:blur(10px);
}
.nav-inner{
  max-width:var(--maxw);
  margin:0 auto;
  padding:16px 24px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-weight:700;
  font-size:1rem;
  letter-spacing:.03em;
  color:var(--white);
  white-space:nowrap;
}
.brand .brand-mark{
  width:34px;height:34px;
  border-radius:50%;
  background:radial-gradient(circle at 32% 30%, var(--cyan-300), var(--navy-700) 72%);
  flex:none;
  box-shadow:inset 0 0 0 1px var(--line-strong);
}
.brand small{
  display:block;
  font-size:.62rem;
  font-weight:400;
  letter-spacing:.14em;
  color:var(--ice-300);
  text-transform:uppercase;
}
.nav-links{
  display:flex;
  align-items:center;
  gap:30px;
  flex:1;
  justify-content:center;
}
.nav-links a{
  font-size:.88rem;
  font-weight:500;
  color:var(--ice-200);
  padding:6px 0;
  position:relative;
  white-space:nowrap;
}
.nav-links a::after{
  content:"";
  position:absolute;left:0;right:0;bottom:-2px;
  height:2px;background:var(--cyan-400);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .25s ease;
}
.nav-links a:hover::after,
.nav-links a.active::after{transform:scaleX(1);}
.nav-links a.active{color:var(--white);}

.nav-right{display:flex;align-items:center;gap:16px;}

.lang-switch{
  display:flex;
  gap:2px;
  background:rgba(255,255,255,.06);
  border:1px solid var(--line);
  border-radius:999px;
  padding:3px;
}
.lang-switch button{
  border:none;
  background:transparent;
  color:var(--ice-300);
  font-size:.72rem;
  font-weight:600;
  letter-spacing:.03em;
  padding:6px 11px;
  border-radius:999px;
  cursor:pointer;
  transition:background .2s, color .2s;
}
.lang-switch button.active{
  background:var(--cyan-400);
  color:var(--navy-950);
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 26px;
  border-radius:999px;
  font-weight:600;
  font-size:.9rem;
  letter-spacing:.02em;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .2s ease, background .2s ease, border-color .2s ease, color .2s ease;
  white-space:nowrap;
}
.btn:hover{transform:translateY(-2px);}
.btn-primary{background:var(--amber-500);color:#1a0e04;}
.btn-primary:hover{background:var(--amber-400);}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--ice-100);}
.btn-ghost:hover{border-color:var(--cyan-300);color:var(--white);}
.btn-block{width:100%;}

.nav-toggle{
  display:none;
  width:40px;height:40px;
  border:1px solid var(--line-strong);
  border-radius:10px;
  background:rgba(255,255,255,.05);
  color:var(--ice-100);
  align-items:center;justify-content:center;
  cursor:pointer;
}

/* ---------- hero ---------- */
.hero{
  position:relative;
  min-height:100vh;
  display:flex;
  align-items:flex-end;
  overflow:hidden;
  background:#04121c;
}
.hero-media{
  position:absolute;inset:0;
  z-index:0;
}
.hero-media img,.hero-media video{
  width:100%;height:100%;object-fit:cover;
}
.hero-media::after{
  content:"";
  position:absolute;inset:0;
  background:
    linear-gradient(to bottom, rgba(4,10,16,.35) 0%, rgba(4,10,16,.35) 40%, rgba(4,10,16,.92) 100%),
    linear-gradient(to right, rgba(4,10,16,.55), rgba(4,10,16,.05) 45%);
}
.hero-content{
  position:relative;z-index:1;
  padding:160px 0 90px;
  width:100%;
}
.hero-content h1{
  font-size:clamp(2.1rem, 5vw, 3.6rem);
  color:var(--white);
  max-width:15ch;
  line-height:1.3;
  text-shadow:0 6px 30px rgba(0,0,0,.4);
}
.hero-content .hero-sub{
  font-size:clamp(1rem,2vw,1.2rem);
  color:var(--ice-200);
  max-width:46ch;
  margin-bottom:2em;
}
.hero-dates{
  display:inline-flex;
  align-items:center;
  gap:10px;
  background:rgba(10,25,36,.6);
  border:1px solid var(--line-strong);
  padding:10px 18px;
  border-radius:999px;
  font-size:.85rem;
  color:var(--ice-100);
  margin-bottom:28px;
  backdrop-filter:blur(6px);
}
.hero-dates b{color:var(--cyan-300);}
.hero-ctas{display:flex;gap:14px;flex-wrap:wrap;}
.scroll-cue{
  position:absolute;bottom:26px;left:50%;
  transform:translateX(-50%);
  z-index:1;
  display:flex;flex-direction:column;align-items:center;gap:8px;
  color:var(--ice-300);font-size:.7rem;letter-spacing:.2em;text-transform:uppercase;
  opacity:.85;
}
.scroll-cue .line{width:1px;height:34px;background:linear-gradient(to bottom, var(--cyan-300), transparent);animation:scrolldown 1.8s ease-in-out infinite;}
@keyframes scrolldown{0%{transform:scaleY(0);transform-origin:top;}50%{transform:scaleY(1);transform-origin:top;}50.1%{transform-origin:bottom;}100%{transform:scaleY(0);transform-origin:bottom;}}

/* page (non-hero) header spacer */
.page-hero{
  position:relative;
  padding:190px 0 70px;
  overflow:hidden;
}
.page-hero .page-hero-bg{
  position:absolute;inset:0;z-index:0;
}
.page-hero .page-hero-bg img{width:100%;height:100%;object-fit:cover;}
.page-hero .page-hero-bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(to bottom, rgba(5,13,20,.55), var(--navy-950) 96%);
}
.page-hero .container{position:relative;z-index:1;}
.page-hero h1{font-size:clamp(1.8rem,4vw,2.7rem);color:var(--white);max-width:22ch;}
.page-hero p.lead{max-width:60ch;font-size:1.05rem;}

/* ---------- sections ---------- */
section{padding:90px 0;position:relative;}
.section-tight{padding:60px 0;}
.section-alt{background:var(--navy-900);}
.section-head{max-width:640px;margin-bottom:48px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.section-head h2{font-size:clamp(1.5rem,3.2vw,2.2rem);color:var(--white);}

.grid{display:grid;gap:26px;}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-2{grid-template-columns:repeat(2,1fr);}
.grid-4{grid-template-columns:repeat(4,1fr);}

.card{
  background:var(--navy-800);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:32px;
  height:100%;
}
.card h3{color:var(--white);font-size:1.15rem;}
.card .card-icon{
  width:46px;height:46px;border-radius:12px;
  background:rgba(95,208,232,.12);
  display:flex;align-items:center;justify-content:center;
  color:var(--cyan-300);
  margin-bottom:18px;
}

.photo-card{
  border-radius:var(--radius-lg);
  overflow:hidden;
  position:relative;
  aspect-ratio:4/5;
  background:var(--navy-800);
}
.photo-card img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
.photo-card:hover img{transform:scale(1.06);}
.photo-card .cap{
  position:absolute;left:0;right:0;bottom:0;
  padding:18px;
  background:linear-gradient(to top, rgba(3,9,14,.85), transparent);
  font-size:.82rem;color:var(--ice-100);
}

/* split / feature rows */
.split{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:60px;
  align-items:center;
}
.split img{border-radius:var(--radius-lg);box-shadow:var(--shadow);}
.split.reverse .split-media{order:2;}
.split-text .eyebrow{margin-bottom:12px;}
.split-text h2{font-size:clamp(1.4rem,3vw,2rem);color:var(--white);}

/* stat row */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:36px 0;}
.stat b{display:block;font-size:clamp(1.6rem,3vw,2.3rem);color:var(--white);font-family:var(--font-latin);}
.stat span{font-size:.82rem;color:var(--ice-300);}

/* timeline */
.timeline{position:relative;padding-left:28px;border-left:2px solid var(--line);}
.timeline-item{position:relative;padding-bottom:40px;}
.timeline-item:last-child{padding-bottom:0;}
.timeline-item::before{
  content:"";position:absolute;left:-34px;top:4px;
  width:12px;height:12px;border-radius:50%;
  background:var(--cyan-400);
  box-shadow:0 0 0 4px rgba(95,208,232,.18);
}
.timeline-item .yr{color:var(--cyan-300);font-weight:700;font-size:.95rem;margin-bottom:6px;display:block;}
.timeline-item h4{color:var(--white);margin-bottom:6px;font-size:1.05rem;}

/* safety list */
.check-list{display:grid;gap:16px;}
.check-item{display:flex;gap:14px;align-items:flex-start;}
.check-item .dot{
  flex:none;width:26px;height:26px;border-radius:50%;
  background:rgba(95,208,232,.15);color:var(--cyan-300);
  display:flex;align-items:center;justify-content:center;
  font-size:.8rem;margin-top:2px;
}
.check-item p{margin:0;color:var(--ice-200);}
.check-item strong{color:var(--ice-100);}

/* callout / banner */
.callout{
  background:linear-gradient(135deg, var(--navy-800), var(--navy-700));
  border:1px solid var(--line-strong);
  border-radius:var(--radius-lg);
  padding:44px;
  display:flex;
  gap:32px;
  align-items:center;
  flex-wrap:wrap;
}
.callout .badge{
  background:var(--amber-500);color:#1a0e04;font-weight:700;
  padding:6px 14px;border-radius:999px;font-size:.75rem;letter-spacing:.06em;
  display:inline-block;margin-bottom:12px;
}
.callout-text{flex:1;min-width:260px;}
.callout h3{color:var(--white);font-size:1.4rem;}

/* CTA band */
.cta-band{
  background:radial-gradient(120% 160% at 50% -20%, rgba(95,208,232,.18), transparent 60%), var(--navy-900);
  text-align:center;
  padding:100px 0;
  border-top:1px solid var(--line);
}
.cta-band h2{color:var(--white);font-size:clamp(1.6rem,3.4vw,2.4rem);max-width:20ch;margin:0 auto .4em;}
.cta-band p{max-width:50ch;margin:0 auto 2em;}
.cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;}

/* table */
.info-table{width:100%;border-collapse:collapse;}
.info-table tr{border-bottom:1px solid var(--line);}
.info-table tr:last-child{border-bottom:none;}
.info-table th,.info-table td{text-align:left;padding:16px 12px;vertical-align:top;}
.info-table th{width:180px;color:var(--cyan-300);font-weight:600;font-size:.85rem;letter-spacing:.04em;text-transform:uppercase;}
.info-table td{color:var(--ice-100);}

/* schedule table */
.schedule{display:grid;gap:14px;}
.schedule-row{
  display:grid;grid-template-columns:140px 1fr;gap:18px;
  background:var(--navy-800);border:1px solid var(--line);border-radius:var(--radius-md);
  padding:20px 22px;
}
.schedule-row .day{color:var(--cyan-300);font-weight:700;}
.schedule-row h4{color:var(--white);margin:0 0 4px;font-size:1rem;}
.schedule-row p{margin:0;font-size:.92rem;}

/* pricing/requirements badges */
.tag-row{display:flex;flex-wrap:wrap;gap:10px;}
.tag{
  border:1px solid var(--line-strong);
  padding:8px 16px;border-radius:999px;
  font-size:.82rem;color:var(--ice-200);
}

/* access */
.access-block{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.access-card{background:var(--navy-800);border:1px solid var(--line);border-radius:var(--radius-lg);padding:28px;}
.access-card h4{color:var(--white);display:flex;align-items:center;gap:10px;}
.access-card .icon{
  width:38px;height:38px;border-radius:10px;background:rgba(95,208,232,.14);
  display:flex;align-items:center;justify-content:center;color:var(--cyan-300);flex:none;
}
.map-wrap{border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow);}
.map-wrap iframe{width:100%;height:420px;border:0;display:block;filter:grayscale(.15) contrast(1.05);}

/* form */
.form-wrap{
  background:var(--navy-800);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:44px;
}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-bottom:18px;}
.field{display:flex;flex-direction:column;gap:8px;margin-bottom:18px;}
.field label{font-size:.85rem;color:var(--ice-200);font-weight:500;}
.field .req{color:var(--amber-400);}
.field input,.field select,.field textarea{
  background:var(--navy-900);
  border:1px solid var(--line-strong);
  border-radius:var(--radius-sm);
  padding:13px 14px;
  color:var(--ice-100);
  font-family:inherit;
  font-size:.95rem;
}
.field textarea{resize:vertical;min-height:130px;}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--cyan-400);}
.field-note{font-size:.78rem;color:var(--ice-300);}
.form-foot{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-top:8px;}
.alt-contact{
  display:flex;gap:18px;flex-wrap:wrap;margin-top:28px;
}
.alt-contact a{
  display:flex;align-items:center;gap:10px;
  border:1px solid var(--line-strong);
  padding:12px 18px;border-radius:999px;
  font-size:.88rem;
}
.alt-contact a:hover{border-color:var(--cyan-300);}

.form-success{
  display:none;
  background:rgba(95,208,232,.1);
  border:1px solid var(--cyan-400);
  border-radius:var(--radius-md);
  padding:18px 22px;
  margin-bottom:20px;
  color:var(--ice-100);
}
.form-success.show{display:block;}

/* lightbox */
.lightbox{
  position:fixed;inset:0;z-index:2000;
  background:rgba(3,8,13,.94);
  display:none;
  align-items:center;justify-content:center;
  padding:40px;
}
.lightbox.open{display:flex;}
.lightbox img{max-width:min(1100px,92vw);max-height:86vh;border-radius:10px;box-shadow:var(--shadow);}
.lightbox .lb-close{
  position:absolute;top:24px;right:28px;
  width:42px;height:42px;border-radius:50%;
  background:rgba(255,255,255,.08);border:1px solid var(--line-strong);
  color:var(--white);font-size:1.2rem;cursor:pointer;
}
.lightbox .lb-cap{
  position:absolute;bottom:28px;left:0;right:0;
  text-align:center;color:var(--ice-300);font-size:.85rem;
}

/* video block */
.video-frame{border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow);position:relative;}
.video-frame video{width:100%;display:block;background:#000;}

/* footer */
.site-footer{
  background:var(--navy-950);
  border-top:1px solid var(--line);
  padding:60px 0 30px;
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;margin-bottom:40px;}
.footer-brand p{max-width:38ch;color:var(--ice-300);font-size:.9rem;}
.footer-col h5{color:var(--white);font-size:.85rem;letter-spacing:.06em;text-transform:uppercase;margin-bottom:16px;}
.footer-col a,.footer-col p{display:block;color:var(--ice-300);font-size:.9rem;margin-bottom:10px;}
.footer-col a:hover{color:var(--cyan-300);}
.footer-social{display:flex;gap:12px;margin-top:10px;}
.footer-social a{
  width:38px;height:38px;border-radius:50%;border:1px solid var(--line-strong);
  display:flex;align-items:center;justify-content:center;
}
.footer-safety{
  font-size:.78rem;color:var(--ice-300);
  border-top:1px solid var(--line);padding-top:24px;
  line-height:1.8;
}
.footer-bottom{
  display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;
  padding-top:20px;font-size:.78rem;color:var(--ice-300);
}

/* utils */
.mt-0{margin-top:0;}
.text-center{text-align:center;}
.hide-mobile{display:initial;}
.show-mobile{display:none;}

/* ---------- responsive ---------- */
@media (max-width:980px){
  .grid-3{grid-template-columns:repeat(2,1fr);}
  .grid-4{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .split{grid-template-columns:1fr;gap:30px;}
  .split.reverse .split-media{order:0;}
  .access-block{grid-template-columns:1fr;}
}
@media (max-width:760px){
  .nav-inner{padding:14px 16px;gap:10px;}
  .brand{gap:8px;font-size:.8rem;}
  .brand small{display:none;}
  .brand .brand-mark{width:26px;height:26px;}
  .lang-switch{padding:2px;}
  .lang-switch button{padding:5px 8px;font-size:.66rem;}
  .nav-right{gap:8px;}
  .nav-links{
    position:fixed;top:0;right:0;bottom:0;
    height:100vh;min-height:100%;
    width:78vw;max-width:320px;
    background:var(--navy-900);
    flex-direction:column;
    align-items:flex-start;
    justify-content:flex-start;
    padding:100px 28px 28px;
    gap:22px;
    overflow-y:auto;
    transform:translateX(100%);
    transition:transform .3s ease;
    border-left:1px solid var(--line);
    z-index:999;
  }
  .nav-links.open{transform:translateX(0);}
  .nav-toggle{display:flex;}
  .nav-right{gap:10px;}
  .grid-3,.grid-4{grid-template-columns:1fr 1fr;}
  .stats{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr;}
  .form-row{grid-template-columns:1fr;}
  .callout{padding:28px;}
  .hide-mobile{display:none;}
  .show-mobile{display:initial;}
}
@media (max-width:520px){
  .grid-3,.grid-4,.grid-2{grid-template-columns:1fr;}
  .hero-content{padding:130px 0 70px;}
  .page-hero{padding:150px 0 50px;}
  section{padding:64px 0;}
  .form-wrap{padding:26px;}
}
@media (max-width:430px){
  .nav-inner{padding:12px;gap:6px;}
  .brand{font-size:.72rem;gap:6px;}
  .brand .brand-mark{width:24px;height:24px;}
  .nav-right{gap:6px;}
  .lang-switch button{padding:4px 6px;font-size:.6rem;}
  .nav-toggle{width:34px;height:34px;}
}

/* overlay when mobile nav open */
.nav-scrim{
  position:fixed;inset:0;background:rgba(3,8,13,.5);
  z-index:998;display:none;
}
.nav-scrim.open{display:block;}