* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}


header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 20px;
  background: #222;
  color: #fff;
}

nav {
  display: none;
}

nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 50px;
  background: #333;
  position: absolute;
  top: 60px;
  right: 20px;
  padding: 15px;
  border-radius: 5px;
}

nav ul li a {
  text-decoration: none;
  color: white;
  font-size: 24px;
  font-weight: 700;
  cursor: pointer;
  font-family: 'Times New Roman', Times, serif;
}

.menu-icon {
  font-size: 1.5em;
  cursor: pointer;
}

/* Show menu inline on larger screens */
@media (min-width: 768px) {
  .menu-icon {
    display: none;
  }

  nav {
    display: block;
    position: static;
  }

  nav ul {
    flex-direction: row;
    background: none;
    position: static;
    padding: 0;
  }
}


nav ul li a {
  position: relative;
  text-decoration: none;
  color: #fff;
}

nav ul li a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  left: 0;
  bottom: -5px;
  background: #ff4b2b;
  transition: width 0.3s ease;
}

nav ul li a:hover::after {
  width: 100%;
}


h1 {
  background: linear-gradient(to bottom right, rgb(224, 255, 50), rgb(232, 30, 255));
  color: transparent;
  background-clip: text;
  font-family: Cambria, Cochin, Georgia, Times, 'Times New Roman', serif;
}

h2,
h4 {
  padding-left: 60px;
  color: azure;
}

ul>li {
  font-size: 19px;
  font-weight: 400;
  color: white;
  font-family: 'Courier New', Courier, monospace;

}

p {
  font-size: 19px;
  font-weight: 400;
  color: rgb(83, 255, 80);

}

a:hover {
  background: linear-gradient(to bottom right, rgb(255, 50, 50), rgba(255, 30, 71, 0.46));
  color: transparent;
  background-clip: text;
  font-size: 28px;
}


#main {
  min-height: 100vh;
  /* fills full viewport height */
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background-image: url();
  background-size: cover;
  /* scale image to cover */
  background-position: center;
  background-repeat: no-repeat;
  padding: 40px;
  /* desktop spacing */
}

/* Tablet screens */
@media (max-width: 1024px) {
  #main {
    flex-direction: column;
    /* stack content vertically */
    padding: 30px;
    min-height: 90vh;
    /* taller section */
  }
}

/* Mobile screens */
@media (max-width: 768px) {
  #main {
    flex-direction: column;
    padding: 25px;
    min-height: auto;
    /* let content define height */
    text-align: center;
  }

  #main p,
  #main span,
  #main div {
    font-size: 1.1em;
    /* keep body text scaling */
  }

}


/* Tablet screens */
@media (max-width: 1024px) {
  h1 {
    font-size: 3rem;
    /* ~48px */
  }
}

/* Mobile screens */
@media (max-width: 768px) {
  h1 {
    font-size: 2.3rem;
    /* ~56px */
  }
}


@media (max-width: 768px) {
  ul {
    text-align: left;
  }

  ul li {
    display: inline-block;
    /* makes items sit neatly */
    margin: 6px 10px;
  }
}


/* Desktop only */
@media (min-width: 1025px) {

  #main>#left {
    height: 1200;
    width: 50%;
    padding: 5px;
  }


  #main>#right {
    height: 1200;
    width: 50%;
    padding: 5px;
  }
}


#goTopBtn {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 99;
  font-size: 30px;
  border: none;
  outline: none;
  background-color: transparent;
  color: white;
  cursor: pointer;
  padding: 12px;
  border-radius: 50%;
  transition: background-color 0.3s;
}

#goTopBtn:hover {
  background-color: #555;
}


/* Registration Section */
#registration-section {
  position: relative;
  width: 100%;
}

/* Registration Button */
.reg-btn {
  position: static;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  padding: 10px 60px;
  background: #d53535e2;
  color: #fff;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 1.2rem;
  transition: background 0.3s ease;
  font-weight: 600;
}

.reg-btn:hover {
  background: #e63939;
}

/* Popup Overlay */
.popup {
  display: none;
  /* hidden by default */
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  justify-content: center;
  align-items: center;
}

/* Popup Content */
.popup-content {
  background: #fff;
  padding: 20px;
  border-radius: 8px;
  width: 90%;
  max-width: 400px;
  animation: fadeInUp 0.5s ease;
}

/* Close Button */
.close {
  float: right;
  font-size: 1.5rem;
  cursor: pointer;
}

.close:hover {
  background-color: #ff4b2b;
}

/* Inputs */
form input,
form textarea {
  width: 100%;
  padding: 10px;
  margin: 8px 0;
  border: 1px solid #ccc;
  border-radius: 4px;
}

/* Submit Button */
.submit-btn {
  width: 100%;
  padding: 12px;
  background: #28a745;
  color: #fff;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}

.submit-btn:hover {
  background: #218838;
}

/* Animation */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

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


/* Popup Overlay */
.popup {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  /* semi-transparent dark overlay */
  backdrop-filter: blur(6px);
  /* frosted glass effect */
  justify-content: center;
  align-items: center;
  animation: fadeIn 0.4s ease;
}

/* Popup Content with Glassmorphism */
.popup-content {
  background: rgba(255, 255, 255, 0.15);
  /* transparent white */
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 12px;
  padding: 25px;
  width: 80%;
  max-width: 420px;
  color: #fff;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
  animation: slideUp 0.5s ease;
}

/* Headings */
.popup-content h2 {
  text-align: center;
  margin-bottom: 20px;
  font-weight: bold;
  color: #ffcc00;
  /* highlight color */
}

/* Inputs */
form input,
form textarea {
  width: 100%;
  padding: 12px;
  margin: 10px 0;
  border: none;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
}

form input::placeholder,
form textarea::placeholder {
  color: #ddd;
}

/* Radio Buttons */
.radio-group label {
  display: block;
  margin: 8px 0;
  font-weight: 500;
}

/* Submit Button */
.submit-btn {
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, #ff4d4d, #ffcc00);
  color: #000;
  font-weight: bold;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: transform 0.2s ease;
}

.submit-btn:hover {
  transform: scale(1.05);
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@keyframes slideUp {
  from {
    transform: translateY(40px);
    opacity: 0;
  }

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


/* Mobile screens */
@media (max-width: 480px) {
  nav ul li a {
    font-size: 0.85rem;
    /* smaller text */
    padding: 6px 10px;
  }
}

/* Tablets */
@media (max-width: 768px) {
  nav ul li a {
    font-size: 0.9rem;
    padding: 7px 11px;
  }
}

@keyframes fadeInLinks {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

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

nav ul li a {
  animation: fadeInLinks 0.5s ease forwards;
}

/* Staggered animation */
nav ul li:nth-child(1) a {
  animation-delay: 0.1s;
}

nav ul li:nth-child(2) a {
  animation-delay: 0.2s;
}

nav ul li:nth-child(3) a {
  animation-delay: 0.3s;
}

nav ul li:nth-child(4) a {
  animation-delay: 0.4s;
}


/* Mobile screens */
@media (max-width: 480px) {
  ul li {
    font-size: 1.1rem;
    /* smaller text */
  }
}



/* Extra shrink on mobile */
@media (max-width: 600px) {
  .popup-content {
    width: 90%;
    /* almost full width */
    max-width: 280px;
    /* smaller max width */
    max-height: 80vh;
    /* shorter height */
    padding: 15px;
    /* reduce padding */
    font-size: 14px;
    /* shrink text */
    overflow: scroll;
  }

  #openRegBtn {
    margin-left: 50%;
    background-color: #218838;
  }
}

/* Mobile adjustments */
@media (max-width: 576px) {
  nav ul {
    gap: 5px;
    background: #333;
    position: absolute;
    top: 50px;
    right: 20px;
    width: 135px;
  }
}
@media (max-width: 480px) {
  #goTopBtn{
    font-size: 20;
  }
}