:root{
  --bg: #0a0a0c;
  --bg-soft: #131316;
  --card: #18181c;
  --line: #2a2a2f;
  --text: #f4f4f2;
  --text-dim: #a3a3ab;
  --accent: #ff4b2b;
  --accent2: #ff8a00;
  --accent-grad: linear-gradient(120deg, var(--accent), var(--accent2));
  color-scheme: dark;
}
*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  background: var(--bg);
  color: var(--text);
  font-family: "Noto Sans JP", system-ui, -apple-system, sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
h1,h2,h3,.en{ font-family:"Oswald","Noto Sans JP",sans-serif; letter-spacing:.02em; }
a{ color: inherit; }
img{ max-width:100%; display:block; }
.wrap{ max-width: 1080px; margin:0 auto; padding: 0 24px; }

/* Nav */
header.site{
  position: sticky; top:0; z-index: 50;
  background: rgba(10,10,12,.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav{
  display:flex; align-items:center; justify-content:space-between;
  padding: 14px 24px;
  max-width: 1080px; margin: 0 auto;
}
.brand{ display:flex; align-items:center; gap:10px; font-weight:700; font-size:1.05rem; }
.brand .dot{ width:10px; height:10px; border-radius:50%; background: var(--accent-grad); flex:none; }
.navlinks{ display:flex; gap: clamp(14px, 3vw, 28px); font-size:.92rem; }
.navlinks a{
  text-decoration:none; color: var(--text-dim);
  padding: 6px 2px; border-bottom: 2px solid transparent;
  transition: color .2s, border-color .2s;
  white-space: nowrap;
}
.navlinks a:hover{ color: var(--text); border-color: var(--accent); }

/* Hero */
#top{
  position: relative;
  padding: clamp(72px, 14vw, 140px) 24px clamp(56px, 10vw, 96px);
  overflow: hidden;
  text-align:center;
}
#top::before{
  content:"";
  position:absolute; inset: -20% -10% auto -10%; height: 70%;
  background: radial-gradient(60% 60% at 50% 0%, rgba(255,75,43,.28), transparent 70%);
  pointer-events:none;
  z-index: 1;
}
#top > .wrap{ position:relative; z-index: 2; }

/* Hero slideshow */
.hero-bg{
  position:absolute; inset:0;
  z-index: 0;
  overflow:hidden;
}
.hero-bg .slide{
  position:absolute; inset:0;
  width:100%; height:100%;
  object-fit:cover;
  opacity:0;
  transform: scale(1.04);
  animation: heroFade 24s infinite;
  will-change: opacity, transform;
}
@keyframes heroFade{
  0%{ opacity:0; transform:scale(1.04); }
  4%{ opacity:1; transform:scale(1.04); }
  16%{ opacity:1; transform:scale(1.1); }
  21%{ opacity:0; transform:scale(1.1); }
  100%{ opacity:0; }
}
.hero-overlay{
  position:absolute; inset:0;
  background: linear-gradient(180deg, rgba(10,10,12,.55) 0%, rgba(10,10,12,.72) 55%, var(--bg) 100%);
}
@media (prefers-reduced-motion: reduce){
  .hero-bg .slide{ animation:none; opacity:0; transform:none; }
  .hero-bg .slide:first-child{ opacity:1; }
}
.kicker{
  position:relative;
  display:inline-block;
  font-size:.78rem; letter-spacing:.24em; text-transform:uppercase;
  color: var(--accent2); font-weight:600; margin-bottom: 18px;
}
.hero-title{
  position:relative;
  font-weight:700;
  font-size: clamp(2.6rem, 8vw, 5.2rem);
  line-height: 1.02;
  margin: 0 0 8px;
}
.hero-title .grad{
  background: var(--accent-grad);
  -webkit-background-clip: text; background-clip:text; color:transparent;
}
.title-img{
  width: min(100%, 640px);
  height: auto;
  margin: 0 auto;
  filter: drop-shadow(0 8px 30px rgba(255,75,43,.25));
}
.hero-sub{
  position:relative;
  font-size: clamp(1rem, 2.4vw, 1.3rem);
  color: var(--text-dim);
  max-width: 46em; margin: 18px auto 0;
}
.hero-meta{
  position:relative;
  display:flex; flex-wrap:wrap; gap: 10px 28px; justify-content:center;
  margin-top: 34px; font-size:.92rem; color: var(--text-dim);
}
.hero-meta span b{ color: var(--text); font-weight:600; }
.next-event{
  display:inline-flex; align-items:center; gap:10px;
  margin: 0 auto 18px; padding: 8px 18px 8px 8px;
  border-radius: 999px; border:1px solid rgba(255,138,0,.4);
  background: rgba(255,75,43,.12);
  font-size:.9rem;
}
.next-event[hidden]{ display:none; }
.next-event-badge{
  background: var(--accent-grad); color:#0a0a0c;
  font-weight:700; font-size:.75rem; letter-spacing:.04em;
  padding: 4px 12px; border-radius: 999px;
}
.cta-row{ position:relative; margin-top: 40px; display:flex; gap:14px; justify-content:center; flex-wrap:wrap; }
.btn{
  display:inline-block; padding: 14px 30px; border-radius: 999px;
  font-weight:600; font-size:.95rem; text-decoration:none;
  transition: transform .15s ease, opacity .2s;
}
.btn:hover{ transform: translateY(-2px); }
.btn-primary{ background: var(--accent-grad); color:#0a0a0c; }
.btn-ghost{ border:1px solid var(--line); color: var(--text); }
.btn-ghost:hover{ border-color: var(--accent); }

/* Section shared */
section{ padding: clamp(56px, 9vw, 96px) 0; }
.section-head{ max-width: 640px; margin: 0 auto 44px; text-align:center; }
.section-head .kicker{ margin-bottom: 10px; }
.section-head h2{ font-size: clamp(1.7rem, 4vw, 2.4rem); margin: 0 0 12px; }
.section-head p{ color: var(--text-dim); margin:0; }
#content{ background: var(--bg-soft); border-top:1px solid var(--line); border-bottom:1px solid var(--line); }

.about-photo{
  border-radius: 16px; overflow:hidden; border:1px solid var(--line);
  margin-bottom: 44px;
}
.about-photo img{ width:100%; height:auto; max-height: 460px; object-fit:cover; display:block; }

.about-video{ margin: 44px 0; }
.video-frame{
  position: relative; width:100%; padding-top: 56.25%; /* 16:9 */
  border-radius: 16px; overflow:hidden; border:1px solid var(--line);
  background: var(--card);
}
.video-frame iframe{
  position:absolute; inset:0; width:100%; height:100%; border:0; display:block;
}

.cards{ display:grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
@media (max-width: 780px){ .cards{ grid-template-columns: 1fr; } }
.card{
  background: var(--card); border:1px solid var(--line); border-radius: 16px;
  padding: 28px 24px;
}
.card .num{ font-family:"Oswald",sans-serif; color: var(--accent); font-size:.85rem; font-weight:600; letter-spacing:.12em; }
.card h3{ font-size: 1.15rem; margin: 10px 0 10px; }
.card p{ color: var(--text-dim); font-size:.94rem; margin:0; }

.lead{
  max-width: 720px; margin: 44px auto 0; text-align:center;
  color: var(--text-dim); font-size: 1.02rem;
}
.lead strong{ color: var(--text); }

/* Calendar */
.cal-frame{
  border:1px solid var(--line); border-radius: 16px; overflow:hidden;
  background: var(--card);
}
.cal-frame iframe{ width:100%; height: 700px; border:0; display:block; filter: invert(0); }
@media (max-width: 600px){ .cal-frame iframe{ height: 560px; } }
.cal-note{ text-align:center; color: var(--text-dim); font-size:.88rem; margin-top: 16px; }
.cal-note a{ color: var(--accent2); text-decoration:underline; }

/* Access map */
.map-frame{
  border:1px solid var(--line); border-radius: 16px; overflow:hidden;
  background: var(--card);
}
.map-frame iframe{ width:100%; height: 420px; border:0; display:block; }

/* Weather */
.weather-container{ display:flex; gap:20px; flex-wrap:wrap; }
.w-card{
  flex:1 1 260px;
  background: var(--card); border:1px solid var(--line); border-radius: 16px;
  padding: 24px;
}
.w-card h3{ margin:0 0 12px; font-size:1.1rem; }
.w-note{ color: var(--text-dim); font-size:.88rem; margin:12px 0 0; }
.windy-frame{ border-radius: 10px; overflow:hidden; }
.windy-frame iframe{ width:100%; height:450px; display:block; border:0; }
.w-forecast{ color: var(--text-dim); font-size:.95rem; }
.forecast-item{ padding: 10px 0; border-bottom: 1px dashed var(--line); }
.forecast-item:last-child{ border-bottom:none; }
.forecast-item strong{ color: var(--text); margin-right: 8px; }
.forecast-row{
  display:flex; align-items:center; gap: 10px; flex-wrap:wrap;
  font-size:.92rem;
}
.forecast-row .fc-date{ color: var(--text); font-weight:600; min-width: 4.2em; }
.forecast-row .fc-icon{ font-size:1.2rem; }
.forecast-row .fc-label{ flex:1 1 auto; min-width: 6em; }
.forecast-row .fc-pop{ color: var(--accent2); min-width: 4.5em; }
.forecast-row .fc-temp{ color: var(--text); font-weight:600; min-width: 5.5em; text-align:right; }

/* SNS */
.sns-grid{ display:grid; grid-template-columns: repeat(auto-fit, minmax(200px,1fr)); gap:16px; max-width: 760px; margin: 0 auto; }
.sns-card{
  display:flex; align-items:center; gap:14px;
  background: var(--card); border:1px solid var(--line); border-radius: 14px;
  padding: 20px; color: var(--text-dim); text-decoration:none;
  transition: border-color .2s, color .2s;
}
.sns-card:hover{ border-color: var(--accent); color: var(--text); }
.sns-card svg{ flex:none; width:26px; height:26px; }
.sns-card .label{ font-weight:600; color: var(--text); font-size:.95rem; }
.sns-card .sub{ font-size:.8rem; }
.badge-soon{
  display:inline-block; margin-left:8px; font-size:.68rem; padding:2px 8px;
  border-radius: 999px; background: rgba(255,138,0,.15); color: var(--accent2);
  letter-spacing:.06em;
}

footer{ border-top:1px solid var(--line); padding: 32px 24px; text-align:center; color: var(--text-dim); font-size:.85rem; }
footer a{ color: var(--text-dim); text-decoration:underline; }

/* Scroll fade-in */
.reveal{
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .7s ease, transform .7s ease;
  transition-delay: var(--reveal-delay, 0s);
  will-change: opacity, transform;
}
.reveal.is-visible{
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce){
  .reveal{ opacity:1; transform:none; transition:none; }
}