:root {
  --background: #0f0c29;
  --primary: #8a2be2;
  --secondary: #5d2ebd;
  --accent: #ff4081;
  --accent-glow: rgba(255, 64, 129, 0.6);
  --text: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.6);
  --icon-size: 32px;
  --transition-speed: 0.5s;
  --nav-height: 100px;
}

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

body {
  width: 100%;
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: linear-gradient(135deg, var(--background) 0%, #24243e 100%);
  overflow: hidden;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  position: relative;
}

/* Enhanced animated background particles */
.particles {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  overflow: hidden;
}

.particle {
  position: absolute;
  border-radius: 50%;
  background: radial-gradient(circle, var(--primary) 0%, transparent 70%);
  animation: float 15s infinite ease-in-out;
  opacity: 0.3;
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0) translateX(0) scale(1);
    opacity: 0.2;
  }
  25% {
    transform: translateY(-40px) translateX(20px) scale(1.1);
    opacity: 0.3;
  }
  50% {
    transform: translateY(-60px) translateX(-20px) scale(1.2);
    opacity: 0.4;
  }
  75% {
    transform: translateY(-30px) translateX(-25px) scale(1.1);
    opacity: 0.3;
  }
}

.title {
  color: var(--text);
  margin-bottom: 3rem;
  text-align: center;
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: 4px;
  text-transform: uppercase;
  text-shadow: 0 2px 15px rgba(0, 0, 0, 0.4), 0 0 20px rgba(138, 43, 226, 0.5);
  position: relative;
  animation: titleGlow 3s infinite alternate;
}

@keyframes titleGlow {
  0% {
    text-shadow: 0 2px 15px rgba(0, 0, 0, 0.4), 0 0 20px rgba(138, 43, 226, 0.5);
  }
  100% {
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.5), 0 0 30px rgba(138, 43, 226, 0.7),
      0 0 40px rgba(255, 64, 129, 0.4);
  }
}

.title span {
  color: var(--accent);
  font-weight: 900;
  text-shadow: 0 0 20px var(--accent-glow), 0 0 30px var(--accent-glow);
  position: relative;
}

.title::after {
  content: "";
  position: absolute;
  bottom: -15px;
  left: 50%;
  transform: translateX(-50%);
  width: 150px;
  height: 5px;
  background: linear-gradient(
    90deg,
    transparent,
    var(--primary),
    var(--accent),
    var(--primary),
    transparent
  );
  border-radius: 3px;
  box-shadow: 0 0 15px var(--primary);
}

nav {
  position: relative;
  width: 550px;
  height: 120px;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  border-radius: 25px;
  padding: 0 20px;
  background: rgba(15, 12, 41, 0.7);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6), 0 0 25px rgba(125, 115, 235, 0.5),
    inset 0 0 20px rgba(255, 255, 255, 0.15);
  overflow: hidden;
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  z-index: 10;
  transform: translateY(0);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

nav:hover {
  transform: translateY(-5px);
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.7), 0 0 30px rgba(138, 43, 226, 0.6),
    inset 0 0 20px rgba(255, 255, 255, 0.2);
}

nav::before {
  content: "";
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  z-index: -1;
  background-size: 400%;
  border-radius: 25px;
  animation: glowing 20s linear infinite;
  opacity: 0.5;
}

@keyframes glowing {
  0% {
    background-position: 0 0;
  }
  50% {
    background-position: 400% 0;
  }
  100% {
    background-position: 0 0;
  }
}

nav ul {
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  z-index: 2;
}

nav ul li {
  list-style: none;
  width: var(--icon-size);
  height: var(--icon-size);
  position: relative;
}

nav ul li a {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  cursor: pointer;
  text-decoration: none;
  position: relative;
  z-index: 2;
}

nav ul li a .icon-wrapper {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  transition: all var(--transition-speed) cubic-bezier(0.68, -0.55, 0.27, 1.55);
}

nav ul li a svg {
  fill: #fff;
  width: 100%;
  height: 100%;
  opacity: 0.8;
  transition: all var(--transition-speed) ease;
  pointer-events: none;
  filter: drop-shadow(0 3px 6px rgba(0, 0, 0, 0.4));
}

nav ul li a.active svg {
  opacity: 1;
  transform: translateY(-12px) scale(1.3);
  filter: drop-shadow(0 0 15px var(--accent-glow));
}

nav ul li:hover a svg {
  opacity: 1;
  transform: translateY(-8px) scale(1.2);
}

nav ul li a .label {
  position: absolute;
  top: 100%;
  margin-top: 15px;
  font-size: 13px;
  color: var(--text);
  background: rgba(0, 0, 0, 0.9);
  padding: 8px 14px;
  border-radius: 8px;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-speed) ease;
  transform: translateY(20px);
  white-space: nowrap;
  z-index: 10;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.4);
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

nav ul li a .label::before {
  content: "";
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  border-width: 6px;
  border-style: solid;
  border-color: transparent transparent rgba(0, 0, 0, 0.9) transparent;
}

nav ul li:hover a .label,
nav ul li a.active .label {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

nav .tubelight {
  position: absolute;
  left: 0px;
  top: 0px;
  transform: translateX(-50%);
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--primary);
  transition: left 500ms cubic-bezier(0.68, -0.55, 0.27, 1.55);
  z-index: 1;
  opacity: 0.9;
  filter: blur(20px);
  box-shadow: 0 0 30px var(--primary), 0 0 60px var(--primary);
}

nav .light-ray {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  border-radius: 25px;
  background: linear-gradient(
    to bottom,
    rgba(138, 43, 226, 0.4) 0%,
    rgba(138, 43, 226, 0.2) 40%,
    rgba(138, 43, 226, 0.1) 100%
  );
  pointer-events: none;
  z-index: 0;
}

/* Enhanced pulsing effect for active tab */
@keyframes pulse {
  0% {
    transform: translateX(-50%) scale(1);
    opacity: 0.9;
    box-shadow: 0 0 30px var(--primary), 0 0 60px var(--primary);
  }
  50% {
    transform: translateX(-50%) scale(1.3);
    opacity: 1;
    box-shadow: 0 0 40px var(--primary), 0 0 80px var(--primary);
  }
  100% {
    transform: translateX(-50%) scale(1);
    opacity: 0.9;
    box-shadow: 0 0 30px var(--primary), 0 0 60px var(--primary);
  }
}

nav .tubelight {
  animation: pulse 3s infinite ease-in-out;
}

/* Enhanced glow effect for icons */
nav ul li a.active .icon-wrapper::after {
  content: "";
  position: absolute;
  width: 180%;
  height: 180%;
  border-radius: 50%;
  background: radial-gradient(circle, var(--primary) 0%, transparent 70%);
  opacity: 0.5;
  z-index: -1;
  animation: ripple 1.5s infinite linear;
}

nav ul li:hover a .icon-wrapper::after {
  content: "";
  position: absolute;
  width: 150%;
  height: 150%;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent) 0%, transparent 70%);
  opacity: 0.4;
  z-index: -1;
}

@keyframes ripple {
  0% {
    transform: scale(0.8);
    opacity: 0.5;
  }
  100% {
    transform: scale(1.8);
    opacity: 0;
  }
}

/* Enhanced shine effect to the nav */
.nav-shine {
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(
    to bottom right,
    rgba(255, 255, 255, 0) 0%,
    rgba(255, 255, 255, 0) 40%,
    rgba(255, 255, 255, 0.2) 45%,
    rgba(255, 255, 255, 0.2) 50%,
    rgba(255, 255, 255, 0) 55%,
    rgba(255, 255, 255, 0) 100%
  );
  transform: rotate(45deg);
  pointer-events: none;
  z-index: 3;
  animation: shine 5s infinite linear;
}

@keyframes shine {
  0% {
    top: -50%;
    left: -50%;
  }
  100% {
    top: 100%;
    left: 100%;
  }
}

/* Enhanced active tab indicator */
.active-indicator {
  position: absolute;
  bottom: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  opacity: 0;
  transition: opacity 0.3s ease;
  box-shadow: 0 0 15px var(--accent);
  animation: indicatorPulse 2s infinite;
}

@keyframes indicatorPulse {
  0%,
  100% {
    transform: translateX(-50%) scale(1);
    box-shadow: 0 0 15px var(--accent);
  }
  50% {
    transform: translateX(-50%) scale(1.3);
    box-shadow: 0 0 20px var(--accent), 0 0 30px var(--accent);
  }
}

nav ul li a.active ~ .active-indicator {
  opacity: 1;
}

/* Content area to show which tab is selected */
.content {
  margin-top: 2.5rem;
  padding: 2rem;
  background: rgba(15, 12, 41, 0.7);
  border-radius: 20px;
  width: 550px;
  text-align: center;
  color: var(--text);
  backdrop-filter: blur(15px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.content::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(
    90deg,
    var(--primary),
    var(--accent),
    var(--primary)
  );
  border-radius: 3px;
  animation: contentGlow 3s infinite alternate;
}

@keyframes contentGlow {
  0% {
    box-shadow: 0 0 10px var(--primary);
  }
  100% {
    box-shadow: 0 0 20px var(--primary), 0 0 30px var(--accent);
  }
}

.content h2 {
  color: var(--accent);
  margin-bottom: 1rem;
  font-weight: 700;
  text-shadow: 0 0 10px rgba(255, 64, 129, 0.5);
  font-size: 1.8rem;
}

.content p {
  line-height: 1.6;
  color: var(--text-secondary);
}

/* Responsive design */
@media (max-width: 600px) {
  nav {
    width: 95%;
    padding: 0 15px;
    height: 90px;
  }

  .title {
    font-size: 2rem;
    margin-bottom: 2.5rem;
  }

  .content {
    width: 95%;
    padding: 1.5rem;
  }

  :root {
    --icon-size: 28px;
  }
}