/* ybx.co.jp — Night Studio (final)
   bg      #0E1014   near-black blue
   surface #14171D   card surface
   line    #232833   hairline
   text    #EDEDE8   warm off-white
   muted   #8A8F98   secondary
   accent  #E8B45A   amber
   glow    amber x deep-blue aurora, low saturation
   type    Space Grotesk (EN/display) + Noto Sans JP (body)
*/

:root{
  --bg:#0E1014;
  --surface:#14171D;
  --line:#232833;
  --text:#EDEDE8;
  --muted:#8A8F98;
  --accent:#E8B45A;
  --col:960px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *{animation:none!important;transition:none!important}
}

body{
  background:var(--bg);
  color:var(--text);
  font-family:"Noto Sans JP",sans-serif;
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
  font-feature-settings:"palt";
}
.en,.grotesk{font-family:"Space Grotesk",sans-serif}

/* ---------- language toggle ---------- */
[data-lang="en"] .i-ja{display:none!important}
html:not([data-lang="en"]) .i-en{display:none!important}
[data-lang="en"] .company-table th .ja{display:none}
[data-lang="en"] body{line-height:1.75}
.lang-switch{display:inline-flex;align-items:center;gap:6px}
.lang-switch i{font-style:normal;color:var(--line)}
.lang-switch button{
  background:none;border:0;cursor:pointer;padding:2px 2px;
  font-family:"Space Grotesk",sans-serif;font-size:12.5px;letter-spacing:.12em;
  color:var(--muted);
}
.lang-switch button:hover{color:var(--text)}
.lang-switch button[aria-pressed="true"]{color:var(--accent)}
.lang-switch button:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:2px}
a{color:inherit;text-decoration:none}
a:hover{opacity:.7}
a:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:2px}
.wrap{max-width:var(--col);margin:0 auto;padding:0 28px}

/* ---------- header ---------- */
header{
  position:sticky;top:0;z-index:9;
  background:rgba(14,16,20,.8);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;justify-content:space-between;align-items:center;height:64px}
.brand{font-family:"Space Grotesk",sans-serif;font-weight:600;font-size:18px;letter-spacing:.02em}
.brand:hover{opacity:1}
.brand b{color:var(--accent);font-weight:600}
nav{display:flex;gap:26px}
nav a{font-family:"Space Grotesk",sans-serif;font-size:12.5px;letter-spacing:.12em;color:var(--muted)}
nav a:hover{color:var(--text);opacity:1}

/* ---------- hero with aurora gradient ---------- */
.hero{position:relative;padding:136px 0 116px;overflow:hidden;border-bottom:1px solid var(--line)}
.hero::before{
  content:"";position:absolute;inset:-40% -20% auto;height:120%;
  background:
    radial-gradient(38% 55% at 32% 38%, rgba(232,180,90,.13), transparent 70%),
    radial-gradient(46% 60% at 68% 22%, rgba(64,98,214,.12), transparent 72%),
    radial-gradient(30% 42% at 55% 60%, rgba(232,180,90,.05), transparent 75%);
  filter:blur(2px);
  pointer-events:none;
}
.hero > .wrap{position:relative}
.tag{
  display:inline-block;font-family:"Space Grotesk",sans-serif;
  font-size:11.5px;letter-spacing:.22em;color:var(--accent);
  border:1px solid rgba(232,180,90,.35);padding:6px 14px;border-radius:99px;margin-bottom:30px;
}
h1{font-size:clamp(32px,5.6vw,52px);font-weight:700;line-height:1.42;letter-spacing:.01em}
.hero p.lead{margin-top:24px;color:var(--muted);max-width:36em}
.fade-up{animation:fadeUp .8s cubic-bezier(.2,.7,.2,1) both}
@keyframes fadeUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}

/* ---------- sections ---------- */
section{padding:100px 0;border-bottom:1px solid var(--line)}
.eyebrow{font-family:"Space Grotesk",sans-serif;font-size:12px;letter-spacing:.24em;color:var(--accent);margin-bottom:14px}
h2{font-size:26px;font-weight:700;margin-bottom:44px}
h2 span{display:block;font-family:"Space Grotesk",sans-serif;font-size:12px;font-weight:400;letter-spacing:.16em;color:var(--muted);margin-top:6px}

/* ---------- cards ---------- */
.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.card{
  background:linear-gradient(180deg, rgba(255,255,255,.015), rgba(255,255,255,0)) , var(--surface);
  border:1px solid var(--line);border-radius:14px;padding:28px 26px;
  transition:border-color .25s, transform .25s;
}
.card:hover{border-color:rgba(232,180,90,.4)}
.card .sub{font-family:"Space Grotesk",sans-serif;font-size:10.5px;letter-spacing:.16em;color:var(--accent);margin-bottom:12px}
.card h3{font-size:16px;font-weight:600;margin-bottom:8px;line-height:1.7}
.card p{font-size:14px;color:var(--muted);line-height:1.85}
.note{margin-top:22px;font-size:12.5px;color:#6b7078}

/* ---------- company table ---------- */
.company-table{width:100%;border-collapse:collapse}
.company-table th,.company-table td{
  text-align:left;vertical-align:top;padding:19px 0;
  border-bottom:1px solid var(--line);font-size:14.5px;font-weight:400;
}
.company-table th{
  width:210px;padding-right:24px;padding-top:22px;
  font-family:"Space Grotesk",sans-serif;font-size:12px;letter-spacing:.14em;
  font-weight:500;color:var(--muted);
}
.company-table th .ja{display:block;font-family:"Noto Sans JP",sans-serif;font-size:13.5px;font-weight:600;letter-spacing:.02em;color:var(--text);margin-bottom:2px}
.company-table td .sub{color:var(--muted);font-size:13px}

/* ---------- contact ---------- */
.contact p{max-width:40em;color:var(--muted)}
.contact p.en{font-size:13.5px;color:#6b7078}
.mail-link{
  display:inline-block;margin-top:26px;
  font-family:"Space Grotesk",sans-serif;font-size:18px;letter-spacing:.02em;
  color:var(--accent);border-bottom:1px solid var(--accent);padding-bottom:2px;
}
.td-link{color:var(--accent);border-bottom:1px solid rgba(232,180,90,.4);padding-bottom:1px}

/* ---------- contact form ---------- */
.contact-form{margin-top:36px;max-width:560px}
.form-row{margin-bottom:22px}
.form-row label{display:block;font-size:13.5px;font-weight:600;margin-bottom:8px}
.form-row label .en-inline{font-family:"Space Grotesk",sans-serif;font-size:10.5px;font-weight:400;letter-spacing:.16em;color:var(--muted);margin-left:10px}
.form-row input,.form-row textarea{
  width:100%;background:var(--surface);border:1px solid var(--line);border-radius:10px;
  padding:12px 14px;font:inherit;font-size:14.5px;color:var(--text);line-height:1.7;
}
.form-row input:focus,.form-row textarea:focus{outline:none;border-color:rgba(232,180,90,.55)}
.form-row textarea{resize:vertical;min-height:150px}
.form-hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.form-submit{
  display:inline-flex;align-items:baseline;gap:10px;cursor:pointer;
  background:none;border:1px solid rgba(232,180,90,.5);border-radius:99px;
  color:var(--accent);padding:12px 30px;font-size:14px;
  font-family:"Noto Sans JP",sans-serif;font-weight:600;
  transition:border-color .25s, background .25s;
}
.form-submit .mini{font-family:"Space Grotesk",sans-serif;font-size:10.5px;letter-spacing:.18em;margin-left:8px}
.form-submit:hover{border-color:var(--accent);background:rgba(232,180,90,.06)}
.form-submit:disabled{opacity:.5;cursor:default}
.form-status{margin-top:16px;font-size:13.5px;color:var(--muted);min-height:1.5em}

/* ---------- footer ---------- */
footer{padding:54px 0 72px}
.footer-inner{display:flex;flex-wrap:wrap;gap:16px 32px;align-items:baseline;justify-content:space-between}
.footer-nav{display:flex;flex-wrap:wrap;gap:22px}
.footer-nav a,.footer-meta{font-family:"Space Grotesk",sans-serif;font-size:11.5px;letter-spacing:.12em;color:var(--muted)}
.footer-meta{text-align:right;line-height:2}

/* ---------- privacy page ---------- */
.doc{padding:88px 0 40px}
.doc h1{font-size:27px;margin-bottom:6px}
.doc .doc-en-title{font-family:"Space Grotesk",sans-serif;font-size:12px;letter-spacing:.18em;color:var(--accent);margin-bottom:8px}
.doc .updated{font-family:"Space Grotesk",sans-serif;font-size:11.5px;letter-spacing:.12em;color:var(--muted);margin-bottom:48px}
.doc h2{font-size:17px;margin:46px 0 14px}
.doc p,.doc li{font-size:14.5px;color:#B9BCC1}
.doc ul{padding-left:1.4em}
.doc li{margin:6px 0}
.doc .en-block{color:var(--muted);font-size:13.5px;line-height:1.85;margin-top:8px}
.doc hr{border:0;border-top:1px solid var(--line);margin:56px 0}

/* ---------- responsive ---------- */
@media(max-width:700px){
  .hero{padding:88px 0 76px}
  section{padding:68px 0}
  .grid{grid-template-columns:1fr}
  .company-table th{width:130px;padding-right:16px}
  nav{gap:16px}
  .footer-meta{text-align:left}
}