@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600&display=swap');

body {
  margin: 0;
  font-family: 'Poppins', sans-serif;
  background: linear-gradient(135deg, #0a0a0a, #1e1e1e);
  color: #f0f0f0;
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
header {
  background: rgba(0, 0, 0, 0.85);
  color: #00ccbc;
  padding: 20px 0;
  text-align: center;
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(10px);
  box-shadow: 0 0 20px rgba(0, 204, 188, 0.25);
  animation: fadeInDown 0.8s ease;
}

header h1 {
  font-size: 2.3em;
  letter-spacing: 1px;
  margin-bottom: 12px;
  text-shadow: 0 0 10px rgba(0, 204, 188, 0.6);
}

nav {
  display: flex;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
}

nav a {
  position: relative;
  color: #f5f5f5;
  text-decoration: none;
  font-weight: 500;
  font-size: 1.05em;
  transition: color 0.3s ease;
}

nav a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 100%;
  height: 2px;
  background-color: #00ccbc;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.3s ease;
}

nav a:hover::after,
nav a.active::after {
  transform: scaleX(1);
  transform-origin: left;
}

nav a:hover,
nav a.active {
  color: #00ccbc;
  text-shadow: 0 0 10px #00ccbc;
}

.track-section {
  text-align: center;
  padding: 60px 20px;
  background: rgba(255, 255, 255, 0.08);
  margin: 80px auto;
  width: 60%;
  border-radius: 16px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.1);
  animation: fadeIn 1s ease;
  transition: transform 0.4s, box-shadow 0.4s;
}

.track-section:hover {
  transform: translateY(-6px);
  box-shadow: 0 0 25px rgba(0, 204, 188, 0.4);
}

.track-section h2 {
  color: #00ccbc;
  font-size: 1.9em;
  margin-bottom: 10px;
}

.track-section p {
  color: #ccc;
  margin-bottom: 20px;
}

.track-section input {
  padding: 12px;
  width: 260px;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 8px;
  background: rgba(255,255,255,0.06);
  color: #f0f0f0;
  font-size: 1em;
  transition: border 0.3s, box-shadow 0.3s;
}

.track-section input:focus {
  border-color: #00ccbc;
  box-shadow: 0 0 8px rgba(0,204,188,0.4);
  outline: none;
}

.track-section button {
  background: #00ccbc;
  color: #000;
  border: none;
  padding: 12px 22px;
  border-radius: 8px;
  margin-left: 10px;
  cursor: pointer;
  font-weight: 600;
  transition: transform 0.3s, box-shadow 0.3s;
  opacity: 0.8;
}

.track-section button:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 15px rgba(0,204,188,0.4);
}

.track-section button:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

footer {
  background: rgba(0, 0, 0, 0.9);
  color: #aaa;
  text-align: center;
  padding: 20px 0;
  font-size: 0.9em;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  margin-top: auto;
}

footer a {
  color: #00ccbc;
  text-decoration: none;
  font-weight: 500;
}

footer a:hover {
  text-decoration: underline;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 768px) {
  nav {
    gap: 20px;
  }
  .track-section {
    width: 85%;
    padding: 40px 20px;
  }
}