/* =========================================================
   Skytree Tickets Tokyo — Dark Sky Premium design system
   ========================================================= */
:root{
  --bg:#070b1f;
  --bg-2:#0d1430;
  --bg-3:#121a3d;
  --panel:rgba(255,255,255,.045);
  --panel-2:rgba(255,255,255,.07);
  --border:rgba(140,170,255,.16);
  --border-strong:rgba(140,170,255,.30);
  --ink:#eef2fb;
  --muted:#a6b2d4;
  --muted-2:#7e8bb3;
  --gold:#e8b84b;
  --gold-2:#f2cf73;
  --sky:#5aa9f0;
  --sky-2:#7fd0ff;
  --good:#5fd0a6;
  --radius:18px;
  --radius-sm:12px;
  --shadow:0 20px 50px -20px rgba(0,0,0,.7);
  --maxw:1160px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","Hiragino Kaku Gothic ProN","Hiragino Sans","Noto Sans JP","Yu Gothic UI","Meiryo",Roboto,"Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:var(--font);color:var(--ink);line-height:1.75;
  background:
    radial-gradient(1100px 700px at 78% -8%,rgba(90,169,240,.20),transparent 60%),
    radial-gradient(900px 600px at 12% 6%,rgba(232,184,75,.12),transparent 55%),
    linear-gradient(180deg,var(--bg) 0%,var(--bg-2) 45%,var(--bg) 100%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
  font-size:17px;
}
img{max-width:100%;display:block}
a{color:var(--sky-2);text-decoration:none}
a:hover{text-decoration:underline}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 20px}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(7,11,31,.82);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--border);
}
.header-inner{display:flex;align-items:center;gap:18px;height:68px}
.brand{display:flex;align-items:center;flex:0 0 auto}
.brand img{height:38px;width:auto}
.nav{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav a.navlink{
  color:var(--muted);font-size:14.5px;font-weight:600;padding:8px 11px;border-radius:9px;
  white-space:nowrap;transition:.18s;
}
.nav a.navlink:hover{color:#fff;background:var(--panel-2);text-decoration:none}
.nav a.navlink.active{color:var(--gold-2)}

/* language switcher */
.lang{position:relative}
.lang-btn{
  display:flex;align-items:center;gap:6px;background:var(--panel-2);border:1px solid var(--border);
  color:var(--ink);font-size:14px;font-weight:600;padding:8px 12px;border-radius:10px;cursor:pointer;
}
.lang-btn:hover{border-color:var(--border-strong)}
.lang-menu{
  position:absolute;right:0;top:calc(100% + 8px);min-width:172px;background:var(--bg-3);
  border:1px solid var(--border-strong);border-radius:12px;padding:6px;box-shadow:var(--shadow);
  display:none;flex-direction:column;gap:2px;
}
.lang-menu.open{display:flex}
.lang:hover .lang-menu,.lang:focus-within .lang-menu{display:flex}
.lang-menu a{color:var(--muted);padding:9px 12px;border-radius:8px;font-size:14px}
.lang-menu a:hover{background:var(--panel-2);color:#fff;text-decoration:none}
.lang-menu a[aria-current="true"]{color:var(--gold-2);background:var(--panel)}

.btn-cta-head{
  display:inline-flex;align-items:center;gap:7px;background:linear-gradient(135deg,var(--gold),var(--gold-2));
  color:#221a06!important;font-weight:800;font-size:14.5px;padding:9px 17px;border-radius:11px;
  white-space:nowrap;box-shadow:0 8px 22px -8px rgba(232,184,75,.6);transition:.18s;
}
.btn-cta-head:hover{transform:translateY(-1px);text-decoration:none;filter:brightness(1.05)}

.hamburger{display:none;background:var(--panel-2);border:1px solid var(--border);border-radius:10px;
  width:42px;height:40px;cursor:pointer;color:#fff;font-size:20px;align-items:center;justify-content:center}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--border)}
.hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,11,31,.55),rgba(7,11,31,.9)),
            var(--hero-img,none) center/cover no-repeat;
  opacity:.9;z-index:0;
}
.hero-inner{position:relative;z-index:1;display:grid;grid-template-columns:1.15fr .85fr;gap:42px;
  align-items:center;padding:64px 20px 70px;max-width:var(--maxw);margin:0 auto}
.hero-eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;letter-spacing:.12em;
  text-transform:uppercase;color:var(--gold-2);background:var(--panel-2);border:1px solid var(--border);
  padding:6px 13px;border-radius:999px}
.hero h1{font-size:clamp(30px,4.6vw,52px);line-height:1.16;margin:18px 0 14px;font-weight:800;letter-spacing:-.01em}
.hero h1 .accent{background:linear-gradient(120deg,var(--sky-2),var(--gold-2));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{font-size:18px;color:var(--muted);max-width:46ch;margin:0 0 26px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.hero-trust{margin-top:22px;display:flex;flex-wrap:wrap;gap:18px;font-size:13.5px;color:var(--muted-2)}
.hero-trust span{display:inline-flex;align-items:center;gap:7px}
.hero-trust .dot{color:var(--good)}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;font-weight:800;
  border-radius:13px;padding:15px 26px;font-size:16px;cursor:pointer;border:1px solid transparent;transition:.18s}
.btn-primary{background:linear-gradient(135deg,var(--gold),var(--gold-2));color:#221a06;
  box-shadow:0 14px 32px -12px rgba(232,184,75,.7)}
.btn-primary:hover{transform:translateY(-2px);text-decoration:none;filter:brightness(1.05)}
.btn-ghost{background:var(--panel-2);color:#fff;border-color:var(--border-strong)}
.btn-ghost:hover{background:var(--panel);text-decoration:none;border-color:var(--sky)}
.btn-block{width:100%}

/* Booking placeholder card */
.booking-card{
  background:linear-gradient(180deg,rgba(20,28,64,.92),rgba(12,18,46,.92));
  border:1px solid var(--border-strong);border-radius:var(--radius);padding:24px 22px;
  box-shadow:var(--shadow);position:relative;
}
.booking-card h2{font-size:19px;margin:0 0 4px;display:flex;align-items:center;gap:9px}
.booking-card .sub{color:var(--muted);font-size:13.5px;margin:0 0 16px}
.booking-rows{display:flex;flex-direction:column;gap:9px;margin:0 0 18px}
.booking-row{display:flex;justify-content:space-between;align-items:baseline;font-size:14.5px;
  padding:11px 14px;background:var(--panel);border:1px solid var(--border);border-radius:11px}
.booking-row .lbl{color:var(--muted)}
.booking-row .price{font-weight:800;color:#fff;font-size:16px}
.booking-row .price small{color:var(--muted-2);font-weight:500;font-size:11px}
.booking-note{font-size:11.5px;color:var(--muted-2);margin-top:13px;text-align:center}
.widget-slot{border:1.5px dashed var(--border-strong);border-radius:12px;padding:14px;text-align:center;
  color:var(--muted-2);font-size:12px;margin-bottom:16px;background:rgba(90,169,240,.05)}

/* ---------- Sections ---------- */
main{display:block}
section.block{padding:62px 0}
section.block.alt{background:linear-gradient(180deg,rgba(255,255,255,.02),transparent)}
.section-head{max-width:760px;margin:0 0 34px}
.section-head .kicker{color:var(--gold-2);font-weight:700;font-size:13px;letter-spacing:.12em;text-transform:uppercase}
h2.section-title{font-size:clamp(24px,3.2vw,34px);margin:8px 0 12px;font-weight:800;line-height:1.2}
.section-head p{color:var(--muted);font-size:17px;margin:0}

.prose{max-width:820px}
.prose h2{font-size:clamp(23px,3vw,31px);margin:46px 0 14px;font-weight:800;line-height:1.25;scroll-margin-top:90px}
.prose h3{font-size:21px;margin:30px 0 10px;font-weight:700;color:#fff}
.prose p{margin:0 0 16px;color:#dfe5f5}
.prose ul,.prose ol{margin:0 0 18px;padding-left:22px;color:#dfe5f5}
.prose li{margin:0 0 8px}
.prose strong{color:#fff}
.prose a{color:var(--sky-2);text-decoration:underline;text-underline-offset:3px}
.prose blockquote{margin:22px 0;padding:16px 20px;border-left:3px solid var(--gold);
  background:var(--panel);border-radius:0 12px 12px 0;color:#e7ecfb;font-style:italic}

/* cards grid */
.grid{display:grid;gap:20px}
.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(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:24px;transition:.2s}
.card:hover{border-color:var(--border-strong);transform:translateY(-3px);background:var(--panel-2)}
.card .ico{width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(90,169,240,.25),rgba(232,184,75,.18));font-size:22px;margin-bottom:14px}
.card h3{margin:0 0 8px;font-size:18.5px;font-weight:700}
.card p{margin:0;color:var(--muted);font-size:15px}
.card.link-card{position:relative}
.card.link-card a.stretched{position:absolute;inset:0;z-index:2}
.card.link-card .more{color:var(--gold-2);font-weight:700;font-size:14px;margin-top:12px;display:inline-block}

.feature-img{border-radius:var(--radius);border:1px solid var(--border);overflow:hidden}
.feature-img img{width:100%;height:100%;object-fit:cover}

/* table */
.table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius);background:var(--panel)}
table.data{width:100%;border-collapse:collapse;min-width:520px;font-size:15px}
table.data caption{text-align:left;padding:14px 18px;color:var(--gold-2);font-weight:700;font-size:14px}
table.data th,table.data td{padding:13px 18px;text-align:left;border-bottom:1px solid var(--border)}
table.data thead th{background:rgba(90,169,240,.10);color:#fff;font-size:13.5px;letter-spacing:.02em}
table.data tbody tr:last-child td{border-bottom:none}
table.data td .price{font-weight:800;color:var(--gold-2)}

/* quick summary box */
.summary-box{background:linear-gradient(135deg,rgba(90,169,240,.12),rgba(232,184,75,.08));
  border:1px solid var(--border-strong);border-radius:var(--radius);padding:8px}
.summary-box .table-wrap{border:none;background:transparent}

/* callouts */
.callout{border-radius:var(--radius);padding:20px 22px;margin:24px 0;border:1px solid var(--border);
  background:var(--panel);display:flex;gap:14px}
.callout .c-ico{font-size:24px;flex:0 0 auto}
.callout.tip{border-color:rgba(95,208,166,.4);background:rgba(95,208,166,.08)}
.callout.warn{border-color:rgba(232,184,75,.4);background:rgba(232,184,75,.08)}
.callout h4{margin:0 0 4px;font-size:16px}
.callout p{margin:0;color:var(--muted);font-size:14.5px}

/* expert note */
.expert{display:flex;gap:16px;align-items:flex-start;background:var(--panel);border:1px solid var(--border);
  border-left:3px solid var(--sky);border-radius:0 var(--radius) var(--radius) 0;padding:20px 22px;margin:26px 0}
.expert .avatar{flex:0 0 auto;width:46px;height:46px;border-radius:50%;
  background:linear-gradient(135deg,var(--sky),var(--gold));display:flex;align-items:center;justify-content:center;
  font-weight:800;color:#0a0e27}
.expert .who{font-weight:700;font-size:14px;color:#fff}
.expert .who span{display:block;font-weight:500;color:var(--muted-2);font-size:12.5px}
.expert p{margin:8px 0 0;font-size:15px;color:#dfe5f5;font-style:italic}

/* FAQ accordion */
.faq{max-width:820px}
.faq-item{border:1px solid var(--border);border-radius:12px;margin-bottom:12px;overflow:hidden;background:var(--panel)}
.faq-q{width:100%;text-align:left;background:none;border:none;color:#fff;font-size:16.5px;font-weight:700;
  padding:18px 20px;cursor:pointer;display:flex;justify-content:space-between;gap:14px;align-items:center;font-family:inherit}
.faq-q .ind{color:var(--gold-2);transition:.2s;flex:0 0 auto}
.faq-q[aria-expanded="true"] .ind{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;padding:0 20px;color:var(--muted)}
.faq-a .inner{padding:0 0 18px}
.faq-item.open .faq-a{max-height:600px}

/* CTA band */
.cta-band{background:linear-gradient(135deg,rgba(90,169,240,.16),rgba(232,184,75,.12));
  border:1px solid var(--border-strong);border-radius:24px;padding:42px;text-align:center;margin:20px 0}
.cta-band h2{font-size:clamp(23px,3vw,32px);margin:0 0 10px}
.cta-band p{color:var(--muted);max-width:54ch;margin:0 auto 24px}

/* breadcrumb */
.breadcrumb{font-size:13.5px;color:var(--muted-2);padding:16px 0 0}
.breadcrumb a{color:var(--muted)}
.breadcrumb .sep{margin:0 7px;opacity:.6}

/* page hero (inner) */
.page-hero{position:relative;border-bottom:1px solid var(--border);overflow:hidden}
.page-hero::before{content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,11,31,.55),rgba(7,11,31,.92)),var(--hero-img,none) center/cover no-repeat;z-index:0}
.page-hero-inner{position:relative;z-index:1;padding:30px 20px 46px;max-width:var(--maxw);margin:0 auto}
.page-hero h1{font-size:clamp(27px,4vw,42px);margin:14px 0 10px;font-weight:800;line-height:1.15}
.page-hero p{color:var(--muted);font-size:18px;max-width:60ch;margin:0}

/* layout w/ sidebar */
.layout{display:grid;grid-template-columns:1fr 320px;gap:44px;align-items:start;padding:50px 0}
.sidebar{position:sticky;top:88px;display:flex;flex-direction:column;gap:20px}
.toc{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:20px}
.toc h4{margin:0 0 12px;font-size:13px;letter-spacing:.1em;text-transform:uppercase;color:var(--gold-2)}
.toc a{display:block;color:var(--muted);font-size:14px;padding:6px 0;border-bottom:1px solid rgba(255,255,255,.05)}
.toc a:hover{color:#fff;text-decoration:none}
.aside-cta{background:linear-gradient(180deg,rgba(20,28,64,.9),rgba(12,18,46,.9));
  border:1px solid var(--border-strong);border-radius:var(--radius);padding:22px;text-align:center}
.aside-cta h4{margin:0 0 6px;font-size:17px}
.aside-cta p{margin:0 0 14px;font-size:13.5px;color:var(--muted)}

/* ---------- Footer ---------- */
.site-footer{background:linear-gradient(180deg,transparent,rgba(0,0,0,.35));border-top:1px solid var(--border);
  margin-top:40px;padding:54px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:34px;margin-bottom:34px}
.footer-grid h4{font-size:14px;letter-spacing:.06em;color:#fff;margin:0 0 14px;text-transform:uppercase}
.footer-grid a{display:block;color:var(--muted);font-size:14.5px;padding:5px 0}
.footer-grid a:hover{color:#fff;text-decoration:none}
.footer-brand img{height:36px;margin-bottom:14px}
.footer-brand p{color:var(--muted-2);font-size:13.5px;max-width:32ch}
.disclaimer{border:1px solid var(--border);background:rgba(232,184,75,.06);border-radius:12px;
  padding:16px 18px;font-size:12.5px;color:var(--muted);line-height:1.7}
.disclaimer strong{color:var(--gold-2)}
.footer-bottom{display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;align-items:center;
  border-top:1px solid var(--border);padding-top:20px;margin-top:26px;font-size:13px;color:var(--muted-2)}
.footer-bottom a{color:var(--muted)}

/* mini inline disclaimer trigger (hero) */
.mini-disc{position:relative;display:inline-flex;align-items:center;gap:5px;font-size:11px;color:var(--muted-2);
  cursor:help;border-bottom:1px dotted var(--muted-2);margin-top:14px}
.mini-disc .tip-pop{position:absolute;bottom:calc(100% + 8px);left:0;width:280px;background:var(--bg-3);
  border:1px solid var(--border-strong);border-radius:10px;padding:12px 14px;font-size:12px;color:var(--muted);
  box-shadow:var(--shadow);opacity:0;visibility:hidden;transition:.18s;z-index:20;line-height:1.6}
.mini-disc:hover .tip-pop,.mini-disc:focus .tip-pop{opacity:1;visibility:visible}
.mini-disc .tip-pop strong{color:var(--gold-2)}

/* utilities */
.center{text-align:center}
.mt-0{margin-top:0}
.lead-row{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0}
.pill{font-size:13px;background:var(--panel-2);border:1px solid var(--border);border-radius:999px;padding:7px 14px;color:var(--muted)}

/* ---------- Responsive ---------- */
@media(max-width:980px){
  .hero-inner{grid-template-columns:1fr;gap:30px;padding:46px 20px 54px}
  .layout{grid-template-columns:1fr;gap:30px}
  .sidebar{position:static;order:-1}
  .toc{display:none}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
  .grid-4{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:760px){
  body{font-size:16px}
  .nav{position:fixed;inset:68px 0 auto 0;flex-direction:column;align-items:stretch;gap:2px;
    background:var(--bg-2);border-bottom:1px solid var(--border);padding:14px 16px 22px;
    margin-left:0;display:none;max-height:calc(100vh - 68px);overflow-y:auto}
  .nav.open{display:flex}
  .nav a.navlink{padding:13px 12px;font-size:16px;border-bottom:1px solid rgba(255,255,255,.05)}
  .nav .lang{order:1;margin-top:8px}
  .lang-menu{position:static;display:flex;box-shadow:none;border:none;padding:0;background:none}
  .lang-menu a{padding:11px 12px}
  .lang-btn{display:none}
  .nav .btn-cta-head{margin-top:10px;justify-content:center}
  .hamburger{display:flex}
  .grid-3,.grid-2,.grid-4{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .cta-band{padding:30px 22px}
  section.block{padding:46px 0}
}