/* =====================================================
   HERO SLIDER – SPEAKER VERSION
   獨立檔案，僅負責首頁 Speaker 輪播
===================================================== */


/* =====================================================
   SLIDER CONTAINER
===================================================== */

.hero-slider {
  position: relative;
  width: 100%;
  height: 100vh;
  overflow: hidden;
}


/* =====================================================
   SLIDES WRAPPER
===================================================== */

.hero-slider .slides {
  position: relative;
  width: 100%;
  height: 100%;
}


/* =====================================================
   SINGLE SLIDE
===================================================== */

.hero-slider .slide {
  position: absolute;
  inset: 0;

  background-repeat: no-repeat;
  background-position: center top;
  background-size: contain;

  opacity: 0;
  transition: opacity 1s ease;
}

.hero-slider .slide.active {
  opacity: 1;
  z-index: 1;
}


/* =====================================================
   DARK OVERLAY (READABILITY)
===================================================== */

.hero-slider .slide::before {
  content: "";
  position: absolute;
  inset: 0;

  background: radial-gradient(
    circle at center,
    rgba(0, 0, 0, 0.35),
    rgba(0, 0, 0, 0.7)
  );
}


/* =====================================================
   TEXT OVERLAY
===================================================== */

.hero-slider .hero-overlay {
  position: relative;
  z-index: 2;

  height: 100%;
  max-width: 720px;

  display: flex;
  flex-direction: column;
  justify-content: flex-end;

  padding-bottom: 120px;
  color: #ffffff;
}

.hero-slider .hero-overlay h1 {
  font-size: 2.8rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.hero-slider .hero-meta {
  font-size: 1.1rem;
  line-height: 1.5;
  opacity: 0.95;
}


/* =====================================================
   ROLE BADGE
===================================================== */

.hero-slider .hero-badge {
  display: inline-block;
  align-self: flex-start;

  margin-bottom: 16px;
  padding: 6px 16px;

  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
}

.hero-slider .hero-badge.keynote {
  background: linear-gradient(135deg, #ffcc00, #ffd966);
  color: #003366;
}

.hero-slider .hero-badge.international {
  background: #2fa36b;
  color: #ffffff;
}


/* =====================================================
   DOT NAVIGATION
===================================================== */

.hero-slider .slider-dots {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);

  display: flex;
  gap: 10px;
  z-index: 3;
}

.hero-slider .dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;

  background: rgba(255, 255, 255, 0.5);
  cursor: pointer;
}

.hero-slider .dot.active {
  background: #ffffff;
}


/* =====================================================
   MOBILE ADJUSTMENTS
===================================================== */

@media (max-width: 768px) {

  .hero-slider {
    height: 90vh;
  }

  .hero-slider .hero-overlay {
    padding-bottom: 80px;
  }

  .hero-slider .hero-overlay h1 {
    font-size: 2rem;
  }

  .hero-slider .hero-meta {
    font-size: 1rem;
  }
}