/* ===================================================================
   北九州AI交流会 ─ Event Detail Page Shared Stylesheet
   ─ Design system aligned with main LP (index.html)
   ─ Each page can override --accent and --accent-deep for season feel
   =================================================================== */

:root{
  --primary:#FF4D6D;
  --primary-deep:#E63357;
  --gold:#FFB627;
  --gold-deep:#F59400;
  --purple:#6A4CFF;
  --ink:#13132A;
  --ink-soft:#2A2A45;
  --muted:#6B6B7E;
  --cream:#FFF8F2;
  --paper:#FFFFFF;
  --line:#06c755;

  /* per-page overridable */
  --accent:#FF4D6D;
  --accent-deep:#E63357;
  --accent-2:#FFB627;
  --accent-grad:linear-gradient(135deg,#FF4D6D 0%,#FFB627 100%);

  --shadow-sm:0 4px 12px rgba(19,19,42,.06);
  --shadow-md:0 12px 32px rgba(19,19,42,.10);
  --shadow-lg:0 30px 80px rgba(19,19,42,.16);

  --font-jp:"Noto Sans JP",system-ui,sans-serif;
  --font-serif:"Noto Serif JP",serif;
  --font-num:"Bebas Neue","Inter",sans-serif;

  --radius:16px;
  --radius-lg:28px;
  --container:1140px;
}

/* ===== Reset / base ===== */
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font-jp);
  color:var(--ink);background:var(--cream);
  line-height:1.85;-webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:none;background:none}

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

/* ===== Background deco ===== */
.bg-deco{
  position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(800px 500px at 5% -10%,rgba(255,77,109,.08),transparent 60%),
    radial-gradient(700px 500px at 100% 30%,rgba(106,76,255,.06),transparent 60%);
}

/* ===== Header ===== */
.header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(255,248,242,.85);
  backdrop-filter:saturate(160%) blur(14px);
  -webkit-backdrop-filter:saturate(160%) blur(14px);
  border-bottom:1px solid rgba(19,19,42,.06);
  transition:transform .4s ease;
}
.header__inner{display:flex;align-items:center;justify-content:space-between;padding:14px 24px;max-width:var(--container);margin:0 auto}
.header__logo{display:flex;align-items:center;gap:10px;font-weight:900;font-size:1.05rem}
.header__logo img{width:36px;height:36px;object-fit:contain}
.header__logo span{color:var(--primary)}
.nav{display:flex;gap:24px;font-weight:700;font-size:.92rem}
.nav a{color:var(--ink-soft);transition:color .2s}
.nav a:hover{color:var(--primary)}
.nav__cta{padding:9px 18px;background:var(--ink);color:#fff !important;border-radius:999px;font-weight:800;font-size:.85rem}
.nav__cta:hover{background:var(--primary)}

/* ===== Buttons ===== */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 26px;border-radius:999px;
  font-weight:900;font-size:.95rem;
  transition:transform .25s,box-shadow .25s,background .25s;
}
.btn-primary{background:var(--accent-grad);color:#fff;box-shadow:0 10px 24px rgba(255,77,109,.3)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 16px 32px rgba(255,77,109,.4)}
.btn-ghost{background:#fff;color:var(--ink);border:1.5px solid rgba(19,19,42,.12)}
.btn-ghost:hover{transform:translateY(-3px);border-color:var(--ink);background:var(--ink);color:#fff}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{transform:translateY(-3px);background:var(--accent)}
.btn .ico{width:18px;height:18px}

/* ===== EVENT HERO ===== */
.ev-hero{
  position:relative;
  padding:160px 0 80px;
  overflow:hidden;
  background:var(--cream);
}
.ev-hero__bg{
  position:absolute;inset:0;z-index:0;
  background-size:cover;background-position:center;
  filter:saturate(105%);
  opacity:.18;
}
.ev-hero__bg-overlay{
  position:absolute;inset:0;z-index:1;pointer-events:none;
  background:
    radial-gradient(900px 500px at 80% 20%,var(--accent-fade,rgba(255,77,109,.18)),transparent 60%),
    linear-gradient(180deg,rgba(255,248,242,.7) 0%,rgba(255,248,242,.95) 80%);
}
.ev-hero__bignum{
  position:absolute;
  right:-40px;top:80px;z-index:1;
  font-family:var(--font-num);
  font-size:clamp(20rem,40vw,38rem);
  line-height:.8;letter-spacing:-.04em;
  background:var(--accent-grad);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  opacity:.12;pointer-events:none;
}

.ev-hero__inner{position:relative;z-index:2}
.ev-hero__crumb{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-num);font-size:.95rem;letter-spacing:.18em;
  color:var(--accent-deep);margin-bottom:24px;
}
.ev-hero__crumb a{color:var(--muted);transition:color .2s}
.ev-hero__crumb a:hover{color:var(--accent)}
.ev-hero__crumb .sep{opacity:.4}
.ev-hero__crumb .now{color:var(--ink);font-weight:700}

.ev-hero__badges{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:24px}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:7px 14px;border-radius:999px;
  font-size:.76rem;font-weight:800;letter-spacing:.06em;
  background:#fff;border:1px solid rgba(19,19,42,.08);box-shadow:var(--shadow-sm);
}
.badge.accent{background:var(--accent-grad);color:#fff;border-color:transparent}
.badge.dark{background:var(--ink);color:#fff;border-color:transparent}
.badge.gold{background:#fff;color:var(--gold-deep);border-color:rgba(255,182,39,.4)}

.ev-hero h1{
  font-family:var(--font-serif);font-weight:900;
  font-size:clamp(2rem,4.5vw,3.8rem);
  line-height:1.15;letter-spacing:.01em;
  margin-bottom:18px;
}
.ev-hero h1 .accent{
  background:var(--accent-grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.ev-hero__date{
  display:block;
  font-family:var(--font-num);font-size:clamp(1.6rem,3vw,2.4rem);
  letter-spacing:.06em;color:var(--accent-deep);margin-bottom:6px;
  font-weight:400;
}
.ev-hero__date small{
  font-family:var(--font-jp);font-size:.45em;color:var(--muted);
  margin-left:.6em;letter-spacing:.15em;font-weight:700;
}
.ev-hero__sub{
  font-size:1.05rem;color:var(--muted);max-width:600px;
  margin-bottom:36px;line-height:1.9;
}
.ev-hero__sub b{color:var(--ink)}

.ev-hero__stats{
  display:flex;gap:28px;flex-wrap:wrap;
  padding:24px 30px;background:#fff;
  border-radius:var(--radius);box-shadow:var(--shadow-md);
  border:1px solid rgba(19,19,42,.05);max-width:760px;
}
.ev-stat{display:flex;flex-direction:column;gap:2px}
.ev-stat__lbl{font-size:.72rem;font-weight:800;letter-spacing:.12em;color:var(--muted);text-transform:uppercase}
.ev-stat__val{font-weight:900;color:var(--ink);font-size:1.1rem;line-height:1.4}
.ev-stat__val .num{font-family:var(--font-num);font-size:1.8rem;color:var(--accent-deep);letter-spacing:.02em;margin-right:4px}

/* ===== Hero Photo Section ===== */
.ev-mainphoto{position:relative;margin-top:-30px;padding-bottom:60px}
.ev-mainphoto__inner{position:relative;border-radius:var(--radius-lg);overflow:hidden;box-shadow:0 30px 90px rgba(19,19,42,.18);max-width:1080px;margin:0 auto}
.ev-mainphoto__inner img{width:100%;aspect-ratio:16/9;object-fit:cover}
.ev-mainphoto__caption{
  position:absolute;left:24px;bottom:24px;
  background:rgba(19,19,42,.85);color:#fff;
  padding:10px 18px;border-radius:999px;
  font-size:.82rem;font-weight:800;letter-spacing:.05em;
  backdrop-filter:blur(10px);
}

/* ===== Section base ===== */
.section{padding:90px 0;position:relative}
.section--alt{background:var(--paper)}
.section--dark{background:var(--ink);color:#fff}
.section__head{margin-bottom:50px;max-width:780px}
.section__head--center{text-align:center;margin-left:auto;margin-right:auto}
.section__eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-num);font-size:1rem;letter-spacing:.2em;
  color:var(--accent);margin-bottom:14px;
}
.section__eyebrow::before{content:"";display:inline-block;width:24px;height:2px;background:var(--accent-grad);border-radius:2px}
.section__head--center .section__eyebrow::after{content:"";display:inline-block;width:24px;height:2px;background:var(--accent-grad);border-radius:2px}
.section__title{
  font-family:var(--font-serif);font-weight:900;
  font-size:clamp(1.6rem,3vw,2.4rem);
  line-height:1.4;margin-bottom:14px;
}
.section__title .accent{background:var(--accent-grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.section__lead{color:var(--muted);font-size:1rem;line-height:1.9}

/* ===== Story / Message ===== */
.ev-story{position:relative}
.ev-story__inner{max-width:780px;margin:0 auto}
.ev-story__body{font-size:1.05rem;line-height:2.1;color:var(--ink-soft)}
.ev-story__body p{margin-bottom:1.6em}
.ev-story__body p:first-of-type::first-letter{
  font-family:var(--font-serif);font-size:3.4em;float:left;
  line-height:.9;padding:6px 12px 0 0;color:var(--accent);font-weight:900;
}
.ev-story__quote{
  margin:50px 0;padding:32px 36px;
  background:linear-gradient(135deg,rgba(255,77,109,.06),rgba(255,182,39,.06));
  border-left:4px solid var(--accent);
  border-radius:0 var(--radius) var(--radius) 0;
  font-family:var(--font-serif);font-size:1.15rem;line-height:1.9;color:var(--ink);
  font-weight:700;position:relative;
}
.ev-story__quote::before{
  content:"\201C";position:absolute;top:-10px;left:14px;
  font-size:4rem;color:var(--accent);opacity:.25;font-family:var(--font-serif);line-height:1;
}

/* ===== Program list ===== */
.program-list{display:grid;gap:14px;max-width:880px;margin:0 auto}
.program-item{
  display:grid;grid-template-columns:120px 1fr;gap:24px;align-items:start;
  padding:24px 28px;background:#fff;border-radius:var(--radius);
  border:1px solid rgba(19,19,42,.06);
  transition:transform .25s,box-shadow .25s;
}
.program-item:hover{transform:translateX(4px);box-shadow:var(--shadow-md)}
.program-item__time{
  font-family:var(--font-num);font-size:1.4rem;
  color:var(--accent-deep);line-height:1;letter-spacing:.02em;
}
.program-item__time small{display:block;font-size:.6em;color:var(--muted);font-family:var(--font-jp);font-weight:700;letter-spacing:.1em;margin-top:6px}
.program-item__body h3{font-family:var(--font-serif);font-size:1.15rem;font-weight:900;margin-bottom:6px;line-height:1.4}
.program-item__body p{color:var(--muted);font-size:.95rem;line-height:1.8}
.program-item__body .speaker{display:inline-block;margin-top:8px;padding:2px 12px;background:linear-gradient(135deg,#FFF5E6,#FFF0F1);color:var(--accent-deep);font-size:.78rem;font-weight:800;border-radius:999px;letter-spacing:.04em}

/* ===== Highlights cards ===== */
.highlights{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.highlight{
  padding:32px 28px;background:#fff;border-radius:var(--radius);
  border:1px solid rgba(19,19,42,.06);
  position:relative;overflow:hidden;
  transition:transform .25s,box-shadow .25s;
}
.highlight:hover{transform:translateY(-6px);box-shadow:var(--shadow-md)}
.highlight::before{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;
  background:var(--accent-grad);
}
.highlight__num{font-family:var(--font-num);font-size:1.4rem;color:var(--accent);letter-spacing:.04em;margin-bottom:14px;display:block}
.highlight__icon{font-size:2rem;margin-bottom:14px;display:block}
.highlight h3{font-family:var(--font-serif);font-size:1.15rem;font-weight:900;margin-bottom:10px;line-height:1.4}
.highlight p{color:var(--muted);font-size:.95rem;line-height:1.8}

/* ===== Speakers / LT list ===== */
.speakers{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px}
.speaker-card{
  padding:24px;background:linear-gradient(180deg,#fff,#FFF8F2);
  border-radius:var(--radius);border:1px solid rgba(19,19,42,.06);
  text-align:center;transition:transform .25s,box-shadow .25s;
}
.speaker-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.speaker-card__avatar{
  width:64px;height:64px;border-radius:50%;
  background:var(--accent-grad);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-num);font-size:1.6rem;
  margin:0 auto 14px;
}
.speaker-card__name{font-family:var(--font-serif);font-size:1.05rem;font-weight:900;margin-bottom:4px}
.speaker-card__role{font-size:.78rem;color:var(--muted);font-weight:700;letter-spacing:.05em}
.speaker-card__topic{margin-top:14px;padding-top:14px;border-top:1px solid rgba(19,19,42,.08);font-size:.88rem;color:var(--ink-soft);line-height:1.7}

/* ===== Gallery (masonry-ish grid) ===== */
.ev-gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.ev-gallery a{position:relative;display:block;overflow:hidden;border-radius:var(--radius);background:#eee;aspect-ratio:4/3}
.ev-gallery img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.ev-gallery a:hover img{transform:scale(1.06)}
.ev-gallery a.large{grid-column:span 2;grid-row:span 2;aspect-ratio:1/1}
.ev-gallery a.tall{aspect-ratio:3/4}

/* ===== Voices ===== */
.voices{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;max-width:880px;margin:0 auto}
.voice{
  padding:28px;background:var(--cream);
  border-radius:var(--radius-lg);
  border:1px solid rgba(19,19,42,.05);
  position:relative;
}
.voice::before{
  content:"\201C";position:absolute;top:10px;right:22px;
  font-family:var(--font-serif);font-size:4rem;line-height:1;
  color:var(--accent);opacity:.2;
}
.voice__body{font-size:.98rem;line-height:1.9;color:var(--ink-soft);margin-bottom:18px}
.voice__from{font-size:.85rem;color:var(--muted);font-weight:700}

/* ===== Pagination (prev/next event) ===== */
.ev-pagination{display:grid;grid-template-columns:1fr 1fr;gap:18px;max-width:980px;margin:0 auto}
.ev-pagination__link{
  display:flex;align-items:center;gap:18px;
  padding:24px 28px;background:#fff;border-radius:var(--radius);
  border:1px solid rgba(19,19,42,.06);
  transition:transform .25s,box-shadow .25s,border-color .25s;
}
.ev-pagination__link:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:var(--accent)}
.ev-pagination__link.disabled{opacity:.4;pointer-events:none}
.ev-pagination__arrow{
  font-family:var(--font-num);font-size:1.6rem;color:var(--accent);
  flex-shrink:0;
}
.ev-pagination__link.next{flex-direction:row-reverse;text-align:right}
.ev-pagination__meta{display:flex;flex-direction:column;gap:2px;flex:1}
.ev-pagination__label{font-size:.72rem;color:var(--muted);font-weight:800;letter-spacing:.1em;text-transform:uppercase}
.ev-pagination__title{font-family:var(--font-serif);font-weight:900;color:var(--ink);font-size:1rem;line-height:1.4}

/* ===== Final CTA ===== */
.ev-cta{
  position:relative;padding:90px 0;
  background:linear-gradient(135deg,#13132A 0%,#3A1855 100%);
  color:#fff;overflow:hidden;text-align:center;
}
.ev-cta::before,.ev-cta::after{
  content:"";position:absolute;border-radius:50%;filter:blur(100px);
}
.ev-cta::before{width:500px;height:500px;background:var(--accent);opacity:.3;top:-150px;left:-100px}
.ev-cta::after{width:500px;height:500px;background:var(--accent-2);opacity:.25;bottom:-150px;right:-100px}
.ev-cta__inner{position:relative;display:grid;gap:24px;max-width:720px;margin:0 auto}
.ev-cta__eyebrow{font-family:var(--font-num);letter-spacing:.2em;color:var(--gold);font-size:.95rem}
.ev-cta h2{font-family:var(--font-serif);font-size:clamp(1.6rem,3vw,2.4rem);font-weight:900;line-height:1.4}
.ev-cta h2 .accent{background:var(--accent-grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.ev-cta p{color:rgba(255,255,255,.75);line-height:1.9;max-width:560px;margin:0 auto}
.ev-cta__buttons{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:10px}

/* ===== Footer ===== */
.footer{background:var(--ink);color:rgba(255,255,255,.7);padding:50px 0 30px}
.footer__top{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:36px;margin-bottom:30px}
.footer__brand img{width:42px;height:42px;display:inline-block;vertical-align:middle;margin-right:10px}
.footer__brand h4{display:inline-block;vertical-align:middle;font-family:var(--font-serif);font-size:1.2rem;color:#fff;font-weight:900}
.footer__brand p{margin-top:14px;font-size:.9rem;line-height:1.8;color:rgba(255,255,255,.6)}
.footer h5{color:#fff;font-size:.85rem;letter-spacing:.15em;text-transform:uppercase;margin-bottom:14px;font-weight:800}
.footer ul{list-style:none;display:grid;gap:8px}
.footer a{font-size:.92rem;color:rgba(255,255,255,.7)}
.footer a:hover{color:var(--accent)}
.footer__bottom{padding-top:24px;border-top:1px solid rgba(255,255,255,.08);display:flex;justify-content:space-between;align-items:center;font-size:.82rem;flex-wrap:wrap;gap:10px}
.footer__bottom .right{color:rgba(255,255,255,.5)}

/* ===== Reveal animation ===== */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .9s ease,transform .9s ease}
.reveal.on{opacity:1;transform:translateY(0)}

/* ===== Mobile ===== */
@media (max-width:920px){
  .nav{display:none}
  .ev-hero{padding:120px 0 60px}
  .ev-hero__bignum{font-size:18rem;top:auto;bottom:-40px;right:-30px;opacity:.08}
  .highlights{grid-template-columns:1fr 1fr}
  .voices{grid-template-columns:1fr}
  .ev-gallery{grid-template-columns:1fr 1fr}
  .ev-gallery a.large{grid-column:span 2;grid-row:span 1;aspect-ratio:4/3}
  .ev-pagination{grid-template-columns:1fr}
  .footer__top{grid-template-columns:1fr;gap:24px}
  .section{padding:60px 0}
  .program-item{grid-template-columns:1fr;gap:8px;padding:20px}
  .ev-mainphoto{margin-top:0}
}
@media (max-width:520px){
  .ev-hero__stats{padding:18px;gap:18px}
  .highlights{grid-template-columns:1fr}
  .ev-gallery{grid-template-columns:1fr}
  .ev-gallery a.large{grid-column:auto;aspect-ratio:4/3}
  .ev-story__body{font-size:.98rem}
}