/* Reset + Base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html{
  scroll-behavior: smooth;
}

body {
  font-family: 'Poppins', sans-serif;
  background: #0F0F0F;
  color: #EAEAEA;
  overflow-x: hidden;
}

/* Header */
header {
  display: flex;
  justify-content: space-between;
  padding: 1rem 2rem;
}

.csi-logo {
  height: 5rem;
}
.sies-logo {
  width:15rem;
}

/* Particle Background */
#particles-js {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  background: #0f0f0f;
}

/* Hero Section */
.hero {
  height: 80vh;
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 0 1rem;
}
.creater, .presenter{
    margin-top: 15px;
  font-size: 1rem;
  color: #cfcfcf;
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
  
}

.creater{
     font-size: 1.5rem;
     font-weight: 750;
}
.presenter{
    font-size: 0.8rem;
}
.hero h1 {
  font-size: 5rem;
  color: #00FFD1;
  font-family: 'Orbitron', sans-serif;
  letter-spacing: 2px;
  animation: glitch 2s infinite, slideIn 1s ease-out forwards;
  opacity: 0;
  transform: translateY(20px);
}

.tagline,
.subtext {
  opacity: 0;
  transform: translateY(20px);
  animation: slideIn 1s ease-out forwards;
}

.tagline {
  font-size: 1.8rem;
  color: #FF0066;
  margin-top: 10px;
}

.subtext {
  margin-top: 15px;
  font-size: 1rem;
  color: #cfcfcf;
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
}

.event-inline {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.8rem;
  opacity: 0;
  transform: translateY(20px);
  animation: slideIn 1s ease-out forwards;
}

.event-inline p {
  font-size: 1rem;
  /* font-family: 'Share Tech Mono', monospace; */
  color: #ffffff;
}

.register-btn {
  background-color: #e73a4b;
  color: white;
  font-weight: bold;
  padding: 0.7rem 1.8rem;
  border-radius: 10px;
  text-decoration: none;
  font-size: 1.1rem;
  transition: 0.3s ease;
  box-shadow:inset 1px 0px 11px 5px #bfafb5, 1px 3px 10px 4px rgba(255, 0, 102, 0.5);
  font-family: 'Orbitron', sans-serif;
}

.register-btn:hover {
  background-color: #e63e50;
  transform: scale(1.05);
  box-shadow: inset 1px 0px 20px 20px #bfafb5, 1px 3px 10px 4px rgba(255, 0, 102, 0.5);
}

.event-banner {
  margin-top: 0.8rem;
  background-color: rgba(255, 255, 255, 0.1);
  padding: 0.5rem 1rem;
  border-radius: 12px;
  font-size: 1.2rem;
  font-weight: bold;
  font-family: 'Orbitron', sans-serif;
  color: #fff;
  box-shadow:0 0 1px 0px #FF0066;
}


.delay-1 {
  animation-delay: 1s;
}

.delay-2 {
  animation-delay: 1.5s;
}

.delay-3 {
  animation-delay: 2s;
}

@keyframes slideIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes glitch {
  0% { text-shadow: 2px 2px #FF0066, -2px -2px #00FFD1; }
  50% { text-shadow: -2px 2px #00FFD1, 2px -2px #FF0066; }
  100% { text-shadow: 2px 2px #FF0066, -2px -2px #00FFD1; }
}

/* Responsive */
@media (max-width: 600px) {
  header{
    padding: 1rem 1rem;
  }
  
  .csi-logo {
  height: 3rem;
}
.sies-logo {
  width:8rem;
}

  .creater, .presenter {
    font-size: 0.9rem;
  }
  .hero h1 {
    font-size: 2.5rem;
  }

  .tagline {
    font-size: 1.2rem;
  }

  .subtext {
    font-size: 0.9rem;
  }
  .event-banner {
    font-size: 1rem;
  }
}
/* Welcome Section */
.welcome-section {
  width: 80%;
  margin: auto;
  background: #161313;
  padding: 4rem 2rem;
  text-align: center;
  animation: slideIn 1s ease-out forwards;
}

.welcome-content {
  max-width: 800px;
  margin: 0 auto;
}

.welcome-title {
  font-size: 3rem;
  font-family: 'Orbitron', sans-serif;
  color: #00FFD1;
  margin-bottom: 1rem;
  animation: glitch 2s infinite;
}

.welcome-subtitle {
  font-size: 1.5rem;
  color: #FF0066;
  margin-bottom: 1.5rem;
}

.welcome-text {
  font-size: 1rem;
  color: #EAEAEA;
  line-height: 1.8;
  margin-bottom: 1.2rem;
}

@media (max-width: 600px) {
  .welcome-title {
    font-size: 2.2rem;
  }

  .welcome-subtitle {
    font-size: 1.2rem;
  }

  .welcome-text {
    font-size: 0.95rem;
  }
}

/* About + Audience Section */
.about-audience-wrapper {
  position: relative;
  height: 30rem;
  width: 100%;
}
.about-audience-section {
  position: absolute; 
  top: 50%; 
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  justify-content: center;
  align-items: flex-start;
  gap: 2rem;
  width: max-content;
  flex-wrap: wrap;
  z-index: 2;
}
.background{
  background: #161313;
  z-index: -1;
  height: 30rem;
  width: 80%;
  margin: auto;
  position: relative;
}

.about-box,
.audience-box {
  height: 18rem;
  flex: 1 1 45%;
  background: rgba(15, 15, 15, 0.7);
  padding: 2rem;
  border-radius: 15px;
  box-shadow: 0 0 20px rgba(0, 255, 209, 0.15);
  border: 1px solid rgba(0, 255, 209, 0.2);
  transition: transform 0.3s ease;
}

.about-box:hover,
.audience-box:hover {
  transform: translateY(-5px);
  box-shadow: 0 0 30px rgba(0, 255, 209, 0.3);
}

.about-box h2,
.audience-box h2 {
  font-family: 'Orbitron', sans-serif;
  color: #00FFD1;
  font-size: 1.8rem;
  margin-bottom: 1rem;
}

.about-box p {
  font-size: 1.1rem;
  margin-bottom: 1rem;
  line-height: 1.6;
}

.about-box ul,
.audience-box ul {
  list-style: disc;
  padding-left: 1.2rem;
  line-height: 1.7;
  font-size: 1rem;
}

.audience-box ul li {
  margin-bottom: 1rem;
}

@media (max-width: 768px) {
  .about-audience-wrapper {
    position: relative;
    padding: 2rem 1rem; 
    height: auto;
  }

  .about-audience-section {
    position: static;
    transform: none;
    flex-direction: column; 
    align-items: stretch; 
    gap: 1.5rem;
    width: 100%;
    padding: 0;
  }

  .about-box,
  .audience-box {
    width: 100%;
    flex: 1 1 auto;
    padding: 1.5rem;
    height: auto;
    font-size: 1rem;
  }

  .about-box h2,
  .audience-box h2 {
    font-size: 1.4rem;
  }

  .about-box ul,
  .audience-box ul {
    font-size: 0.95rem;
  }

  .background {
    display: none; 
  }
}
/* contact-sections */
.contact-section {
  padding: 4rem 2rem;
  background: transparent;
  text-align: center;
}

.contact-title {
  font-size: 2.5rem;
  font-family: 'Orbitron', sans-serif;
  color: #FF0066;
  margin-bottom: 3rem;
  text-shadow: 0 0 10px #ff00666c;
}

.contact-flex {
  display: flex;
  justify-content: center;
  gap: 4rem;
  flex-wrap: wrap;
}

.contact-column {
  background: rgba(15, 15, 15, 0.6);
  padding: 2rem;
  border: 1px solid rgba(255, 0, 102, 0.2);
  border-radius: 15px;
  width: 280px;
  box-shadow: 0 0 15px rgba(255, 0, 102, 0.15);
  transition: 0.3s ease;
}

.contact-column:hover {
  transform: translateY(-5px);
  box-shadow: 0 0 30px rgba(255, 0, 102, 0.3);
}

.contact-role {
  font-size: 1.5rem;
  font-family: 'Orbitron', sans-serif;
  color: #00FFD1;
  margin-bottom: 1.5rem;
  text-shadow: 0 0 5px #00ffd17a;
}

.contact-entry {
  margin-bottom: 1.8rem;
}

.name {
  font-weight: bold;
  font-size: 1.1rem;
  color: #EAEAEA;
  margin-bottom: 0.3rem;
}

.detail {
  font-size: 0.95rem;
  color: #ccc;
}

@media (max-width: 600px) {
  .contact-column {
    width: 100%;
  }
}

.site-footer {
  padding: 3rem 1rem;
  background-color: #0f0f0f;
  text-align: center;
  margin-top: 5rem;
  border-top: 1px solid #222;
}

.footer-cta {
  font-size: 2.5rem;
  color: #00FFD1;
  animation: blink 1s infinite;
  font-family: 'Orbitron', sans-serif;
  margin-bottom: 1rem;
}

@keyframes blink {
  50% { opacity: 0.4; }
}

.footer-register-btn {
  background-color: #e73a4b;
  color: white;
  font-weight: bold;
  padding: 0.8rem 2rem;
  border-radius: 10px;
  font-size: 1.1rem;
  text-decoration: none;
  display: inline-block;
  margin: 1rem auto 2rem;
  font-family: 'Orbitron', sans-serif;
  box-shadow: inset 1px 0px 11px 5px #bfafb5, 1px 3px 10px 4px rgba(255, 0, 102, 0.5);
  transition: 0.3s ease;
}

.footer-register-btn:hover {
  background-color: #e63e50;
  transform: scale(1.05);
  box-shadow: inset 1px 0px 20px 20px #bfafb5, 1px 3px 10px 4px rgba(255, 0, 102, 0.5);
}

.footer-socials {
  margin: 1rem 0;
  display: flex;
  justify-content: center;
  gap: 1.5rem;
}

.footer-socials i {
  font-size: 1.6rem;
  color: #ffffff;
  transition: transform 0.3s ease, color 0.3s ease;
}

.footer-socials i:hover {
  transform: scale(1.3);
  color: #00FFD1;
}

.footer-credit {
  font-size: 0.9rem;
  color: #aaa;
  margin-top: 1rem;
}