body,
  html {
      margin: 0;
      padding: 0;
      height: 100%;
      font-family: 'Montserrat', sans-serif;
      color: white;
      background: linear-gradient(270deg, #651D94 6.74%, #0F1B4B 82.95%);
      overflow: hidden;
  }

  main {
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      height: 100%;
      text-align: center;
  }

  h1 {
      font-size: 18px;
      font-weight: 500;
      letter-spacing: 2px;
      margin-bottom: 40px;
      transition: all 0.3s ease;
  }

  /* Text display area */
  .text-display {
      background: rgba(255, 255, 255, 0.1);
      border: 2px solid rgba(255, 255, 255, 0.3);
      border-radius: 10px;
      padding: 15px 30px;
      margin-bottom: 30px;
      min-width: 200px;
      min-height: 40px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 24px;
      font-weight: 700;
      letter-spacing: 3px;
      backdrop-filter: blur(5px);
      transition: all 0.3s ease;
  }

  .text-display.highlight {
      background: rgba(255, 255, 255, 0.2);
      border-color: rgba(255, 255, 255, 0.6);
      box-shadow: 0 0 20px rgba(255, 255, 255, 0.3);
  }

  .keypad {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      width: 240px;
  }

  #gameTitle {
      font-size: 32px;
      font-weight: 700;
      margin-bottom: 20px;
      text-transform: uppercase;
      letter-spacing: 4px;
      text-decoration: none !important;
      color: white !important;
      text-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
  }

  .keypad button {
      width: 60px;
      height: 60px;
      background-color: transparent;
      border: 2px solid white;
      border-radius: 50%;
      color: white;
      font-size: 24px;
      font-weight: 500;
      cursor: pointer;
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
  }

  .keypad button:hover {
      background-color: white;
      color: #1a2a6c;
      transform: scale(1.05);
  }

  .keypad .zero {
      grid-column: 2;
  }

  /* Animation classes */
  .keypad button.clicked {
      background-color: white;
      color: #1a2a6c;
      transform: scale(0.95);
      box-shadow: 0 0 15px rgba(255, 255, 255, 0.5);
  }

  .keypad button.animate-click::before {
      content: '';
      position: absolute;
      top: 50%;
      left: 50%;
      width: 0;
      height: 0;
      background: rgba(255, 255, 255, 0.4);
      border-radius: 50%;
      transform: translate(-50%, -50%);
      animation: ripple 0.6s ease-out;
  }

  @keyframes ripple {
      0% {
          width: 0;
          height: 0;
          opacity: 1;
      }

      100% {
          width: 120px;
          height: 120px;
          opacity: 0;
      }
  }

  /* Pulse animation for title */
  .pulse {
      animation: pulse 1.5s ease-in-out infinite;
  }

  @keyframes pulse {

      0%,
      100% {
          transform: scale(1);
          opacity: 1;
          text-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
      }

      50% {
          transform: scale(1.05);
          opacity: 0.9;
          text-shadow: 0 0 20px rgba(255, 255, 255, 0.6);
      }
  }

  /* Typing animation for text display */
  .typing {
      position: relative;
  }

  .typing::after {
      content: '|';
      position: absolute;
      right: -10px;
      animation: blink 1s infinite;
  }

  @keyframes blink {

      0%,
      50% {
          opacity: 1;
      }

      51%,
      100% {
          opacity: 0;
      }
  }

  /* Responsive design */
  @media (max-width: 768px) {
      header {
          flex-direction: column;
          padding: 15px;
          gap: 15px;
      }

      nav ul {
          flex-direction: column;
          text-align: center;
          gap: 10px;
      }

      .keypad {
          width: 200px;
      }

      .keypad button {
          width: 50px;
          height: 50px;
          font-size: 20px;
      }

      .text-display {
          font-size: 20px;
          padding: 12px 25px;
          min-width: 150px;
      }
  }
  /* Header */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-left: 4.75vw;
  padding-right: 4.75vw;
  padding-top: 1rem;
  padding-bottom: 1rem;
  width: 100%;
  box-sizing: border-box;
  background-color: #f1f1f1;
  max-height: 100px;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 30px;
  flex: 1;
}

.logo {
  display: flex;
  align-items: center;
  color: #050f66;
  font-family: 'JetBrains Mono', monospace;
  font-size: 28px;
  font-weight: 800;
  flex-shrink: 0;
}

.logo img {
  height: 60px;
  margin-right: 128px;
  padding: 5px;
}

.logo a {
  color: #050f66;
  text-decoration: none;
}

/* Navigation */
nav {
  display: block;
  flex: 1;
}

nav ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 60px;
}

nav li {
  margin: 0;
}

nav li p {
  margin: 0;
  padding: 0;
}

nav a {
  text-decoration: none;
  color: #0f1b4b;
  font-weight: 500;
  font-size: 16px;
  letter-spacing: 0.5px;
  transition: color 0.3s ease;
  text-shadow: 0 1px 1px rgba(0, 0, 0, 0.15);
}

.underline {
  border-bottom: 2px solid #0f1b4b;
  padding-bottom: 2px;
  display: inline-block;
  transition: all 0.3s ease;
}

.underline:hover {
  border-bottom-color: #a7c5eb;
}

.underline:hover a {
  color: #a7c5eb;
}

nav a:hover {
  color: #a7c5eb;
}

/* Social Icons */
.social-icons {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  flex-shrink: 0;
}

.social-icons a {
  color: #0f1b4b;
  margin-left: 20px;
  font-size: 18px;
  transition: color 0.3s ease;
}

.social-icons a:hover {
  color: #a7c5eb;
}

/* Hide mobile social icons on desktop */
.social-icons-mobile {
  display: none;
}

/* Show desktop social icons */
.social-icons-desktop {
  display: flex;
}

/* Hamburger Menu - Hidden by default */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4px;
  cursor: pointer;
  padding: 0;
  background: rgba(15, 27, 75, 0.1);
  border: 2px solid #0f1b4b;
  border-radius: 5px;
  z-index: 1000;
  width: 28px;
  height: 28px;
  position: relative;
}

.hamburger span {
  width: 16px;
  height: 2px;
  background-color: #0f1b4b;
  border-radius: 2px;
  transition: all 0.3s ease;
  display: block;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.hamburger span:nth-child(1) {
  top: 5px;
}

.hamburger span:nth-child(2) {
  top: 12px;
}

.hamburger span:nth-child(3) {
  top: 19px;
}

.hamburger.active span:nth-child(1) {
  top: 12px;
  transform: translateX(-50%) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  top: 12px;
  transform: translateX(-50%) rotate(-45deg);
}

/* Text Display Elements */
.text-display {
  background: rgba(255, 255, 255, 0.1);
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 10px;
  padding: 15px 30px;
  margin-bottom: 30px;
  min-width: 200px;
  min-height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 3px;
  backdrop-filter: blur(5px);
  transition: all 0.3s ease;
}

.text-display.highlight {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.6);
  box-shadow: 0 0 20px rgba(255, 255, 255, 0.3);
}

/* Footer */
footer {
  text-align: right;
  padding: 0.5rem;
  font-size: 12px;
  width: 100%;
  box-sizing: border-box;
  background-color: #f1f1f1;
  color: #0f1b4b;
}

/* Tablet/Small Desktop - Below 1280px */
@media (max-width: 1280px) {
  .logo img {
    margin-right: 60px;
  }

  nav ul {
    gap: 30px;
  }

  nav a {
    font-size: 14px;
  }
}

/* Tablet - Below 1024px */
@media (max-width: 1024px) {
  .logo img {
    margin-right: 40px;
    height: 50px;
  }

  nav ul {
    gap: 20px;
  }

  nav a {
    font-size: 13px;
  }
}

/* Mobile Landscape - Below 768px */
@media (max-width: 768px) {
  header {
    flex-direction: column;
    padding: 15px;
    gap: 0;
    max-height: none;
    align-items: center;
  }

  .header-left {
    flex-direction: row;
    justify-content: center;
    align-items: center;
    gap: 20px;
    width: 100%;
    position: relative;
    flex: 0 0 auto;
  }

  .logo {
    justify-content: center;
    flex: 0 0 auto;
  }

  .logo img {
    margin-right: 0;
    height: 50px;
  }

  /* Hide desktop nav */
  .header-left nav {
    display: none;
  }

  /* Show hamburger menu */
  .hamburger {
    display: flex !important;
    position: relative;
    flex: 0 0 auto;
  }

  /* Hide desktop social icons on mobile */
  .social-icons-desktop {
    display: none !important;
  }

  /* Show mobile social icons inside nav */
  .social-icons-mobile {
    display: flex !important;
    justify-content: center;
    width: 100%;
    padding-top: 15px;
    padding-bottom: 10px;
  }

  .social-icons-mobile a {
    margin: 0 15px;
  }

  /* Collapsible nav for mobile */
  .header-left nav {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    width: 100%;
    background-color: #f1f1f1;
    z-index: 999;
  }

  .header-left nav.active {
    display: block !important;
    max-height: 600px;
    padding: 15px 0;
  }

  nav ul {
    flex-direction: column;
    text-align: center;
    gap: 15px;
    width: 100%;
  }

  footer {
    padding-right: 3rem;
  }

  .keypad {
    width: 200px;
  }

  .keypad button {
    width: 50px;
    height: 50px;
    font-size: 20px;
  }

  .text-display {
    font-size: 20px;
    padding: 12px 25px;
    min-width: 150px;
  }

}

/* Mobile Portrait - Below 640px */
@media (max-width: 640px) {
  header {
    padding: 10px;
  }

  .logo img {
    height: 40px;
  }

  nav a {
    font-size: 14px;
  }

  footer {
    padding-right: 2rem;
    font-size: 10px;
  }
}