.hero-section {
  width: 100%;
  min-height: 560px; /* từ 590 */
  
  background:
    radial-gradient(circle at bottom right, rgba(0, 195, 255, 0.35), transparent 28%),
    linear-gradient(115deg, #1d1765 0%, #2337b2 45%, #1f63e6 100%);
  overflow: hidden;
  position: relative;
  color: #fff;
  padding: 50px 24px 24px;
}

.hero-section::before,
.hero-section::after {
  content: "";
  position: absolute;
  width: 260px;
  height: 260px;
  border: 1px solid rgba(0, 190, 255, 0.35);
  opacity: 0.55;
  pointer-events: none;
}

.hero-section::before {
  top: -110px;
  left: -80px;
  transform: rotate(25deg);
}

.hero-section::after {
  right: -80px;
  bottom: -70px;
  transform: rotate(-20deg);
}

.hero-inner {
  max-width: 1160px;
  margin: 0 auto;
  position: relative;
  z-index: 2;

  display: flex;
  flex-direction: column;
  align-items: center;
}

/* Title */
.hero-title {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 38px;
  margin-bottom: 42px;
}

.title-block {
  text-align: center;
}
.sub-title,
.main-title,
.conference,
.forum {
  font-family: "Orbitron", Arial, sans-serif;
  text-transform: uppercase;
}
.sub-title {
  font-size: 36px;
  font-weight: 500;
  letter-spacing: 2px;
  line-height: 1;
  margin-bottom: 12px;
}

.main-title {
  font-size: 70px;
  font-weight: 900;
  letter-spacing: -2px;
  line-height: 0.95;
  margin-bottom: 16px;
}

.conference,
.forum {
  font-size: 35px;
  font-weight: 700;
  letter-spacing: 3px;
  line-height: 1;
}

.conference {
   background: linear-gradient(
    90deg,
    #ff1f14 0%,
    #ff3b16 40%,
    #ff9d00 90%
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.forum {
   background: linear-gradient(
    90deg,
    #e60012 0%,
    #ff3b00 45%,
    #ffb000 100%
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.title-divider {
  width: 2px;
  height: 185px;
  background: rgba(255, 255, 255, 0.85);
}

/* Info */
.hero-info {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: stretch;
  gap: 30px;
  margin-bottom: 68px;
}

.time-box,
.location-box {
  border: 2px solid rgba(37, 139, 255, 0.9);
  background: rgba(10, 34, 120, 0.22);
  border-radius: 18px;
  box-shadow: inset 0 0 14px rgba(37, 139, 255, 0.25);
}

.time-box {
  width: 290px;
  padding: 10px 22px;
  text-align: center;
}

.time {
  font-size: 28px;
  font-style: italic;
  letter-spacing: 3px;
  color: #65a4ff;
}

.date {
  font-size: 31px;
  font-weight: 900;
  letter-spacing: 4px;
  margin-top: 4px;
}

.location-box {
  display: flex;
  flex-direction: column;
  justify-content: center;

  padding: 14px 28px;
  border-radius: 20px;

  border: 2px solid rgba(37, 139, 255, 0.9);
  background: rgba(10, 34, 120, 0.25);
  box-shadow: inset 0 0 14px rgba(37, 139, 255, 0.25);
}

.location-title {
  font-size: 24px;
  font-weight: 600;
 
  letter-spacing: 2px;   /* ❗ giảm từ 4 → 2 */
  line-height: 1.2;

  text-align: center;    /* ❗ căn giữa */
}

.location-address {
  font-size: 20px;
     opacity: 0.85;
  letter-spacing: 1px;   /* ❗ giảm mạnh */
  line-height: 1.3;

  color: #6fa5ff;

  text-align: center;    /* ❗ căn giữa */
  margin-top: 6px;
}
.location-title,
.location-address {
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}
/* Button */
.register-btn {
  min-width: 380px;
  height: 74px;
  padding: 0 18px 0 52px;

  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 22px;

  background: #fff;
  border: 5px solid #0b0758;
  border-radius: 999px;

  color: #ff5a3c;
  text-decoration: none;
  font-size: 27px;
  font-weight: 900;
  letter-spacing: 1px;
}

.btn-icon {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: #0b0758;
  color: #fff;

  display: flex;
  align-items: center;
  justify-content: center;

  font-size: 58px;
  line-height: 0.7;
  font-weight: 700;
}

/* Tablet */
@media (max-width: 991px) {
  .hero-section {
    min-height: 430px;
    padding-top: 36px;
  }

  .hero-title {
    gap: 24px;
    margin-bottom: 32px;
  }

  .sub-title {
    font-size: 26px;
  }

  .main-title {
    font-size: 54px;
  }

  .conference,
  .forum {
    font-size: 30px;
  }

  .title-divider {
    height: 140px;
  }

  .hero-info {
    gap: 16px;
    margin-bottom: 46px;
  }

  .time-box {
    width: 210px;
  }

  .time {
    font-size: 21px;
  }

  .date {
    font-size: 25px;
  }

  .location-title {
    font-size: 20px;
  }

  .location-address {
    font-size: 18px;
  }

  .register-btn {
    min-width: 300px;
    height: 62px;
    font-size: 22px;
  }

  .btn-icon {
    width: 38px;
    height: 38px;
    font-size: 44px;
  }
}

/* ===== HERO ANIMATION ===== */

.hero-title,
.hero-info,
.register-btn {
  opacity: 0;
  transform: translateY(30px);
  animation: heroFadeUp 0.8s ease forwards;
}

/* Delay từng phần */
.hero-title {
  animation-delay: 0.2s;
}

.hero-info {
  animation-delay: 0.5s;
}

.register-btn {
  animation-delay: 0.8s;
}

@keyframes heroFadeUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Mobile vẫn giữ 1 hàng, co nhỏ */
@media (max-width: 767px) {
  .hero-section {
    min-height: 250px;
    padding: 22px 8px 14px;
  }

  .hero-title {
    gap: 10px;
    margin-bottom: 20px;
  }

  .sub-title {
    font-size: 12px;
    letter-spacing: 1px;
    margin-bottom: 5px;
  }

  .main-title {
    font-size: 25px;
    letter-spacing: -1px;
    margin-bottom: 7px;
  }

  .conference,
  .forum {
    font-size: 14px;
    letter-spacing: 1px;
  }

  .title-divider {
    width: 1px;
    height: 70px;
  }

  .hero-info {
    gap: 8px;
    margin-bottom: 30px;
  }

  .time-box {
    width: 105px;
    padding: 5px 6px;
    border-radius: 9px;
  }

  .time {
    font-size: 11px;
    letter-spacing: 1px;
  }

  .date {
    font-size: 13px;
    letter-spacing: 1px;
  }

  .location-box {
    padding: 5px 8px;
    border-radius: 9px;
  }

  .location-title {
    font-size: 10px;
    letter-spacing: 1px;
  }

  .location-address {
    font-size: 9px;
    letter-spacing: 0.5px;
  }

  .register-btn {
    min-width: 165px;
    height: 38px;
    padding: 0 8px 0 20px;
    border-width: 3px;
    font-size: 13px;
    gap: 8px;
  }

  .btn-icon {
    width: 24px;
    height: 24px;
    font-size: 30px;
  }
}