@import url("https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600;700&display=swap");

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Poppins", sans-serif;
  text-decoration: none;
  border: none;
  outline: none;
  scroll-behavior: smooth;
}

:root {
  --bg-color: #0d1117;
  --second-bg-color: #161b22;
  --text-color: #e6edf3;
  --main-color: #00eeff;
}

body {
  background: var(--bg-color);
  color: var(--text-color);
  overflow-x: hidden;
}

/* Header Styling */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 2rem 9%;
  background: rgba(13, 17, 23, 0.8);
  backdrop-filter: blur(10px);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.6rem 3rem;
  z-index: 100;
}

.logo {
  font-size: 2.5rem;
  color: var(--text-color);
  font-weight: 700;
}

nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 1.2rem 0;
}
nav a {
  font-size: 1.1rem;
  color: var(--text-color);
  margin-left: 3rem;
  transition: 0.3s;
}

nav a:hover,
nav a.active {
  color: var(--main-color);
  text-shadow: 0 0 10px var(--main-color);
}

/* Education Section */
.education {
  min-height: 100vh;
  padding: 10rem 9% 5rem;
}

.heading {
  font-size: clamp(3rem, 4.5vw, 4rem);
  text-align: center;
  margin-bottom: 5rem;
}

.heading span {
  color: var(--main-color);
}

/* Timeline Layout */
.timeline-container {
  max-width: 800px;
  margin: 0 auto;
  border-left: 2px solid var(--main-color);
  padding: 0 20px;
  position: relative;
}

.timeline-item {
  position: relative;
  margin-bottom: 40px;
  padding-left: 30px;
}

/* Glowing Dot */
.timeline-dot {
  position: absolute;
  left: -31px;
  top: 5px;
  height: 20px;
  width: 20px;
  background: var(--bg-color);
  border: 3px solid var(--clr);
  border-radius: 50%;
  box-shadow: 0 0 15px var(--clr);
}

.timeline-date {
  font-size: 1.1rem;
  color: var(--clr);
  font-weight: 600;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Card Styling */
.timeline-content {
  background: var(--second-bg-color);
  padding: 1.5rem;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: 0.4s ease;
  position: relative;
  overflow: hidden;
}

.timeline-content::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--clr);
}

.timeline-content:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  border: 1px solid var(--clr);
}

.timeline-content h3 {
  font-size: 1.8rem;
  margin-bottom: 1rem;
}

.timeline-content p {
  font-size: 1rem;
  line-height: 1.6;
  color: #8b949e;
}

/* Responsive */
@media (max-width: 768px) {
  header {
    padding: 1rem 3.5%;
    justify-content: center;
  }

  nav {
    width: 100%;
    justify-content: center;
  }

  nav a {
    margin: 0 0.8rem;
    font-size: 1.2rem;
  }

  .education {
    padding: 13rem 6% 4rem;
  }

  .heading {
    font-size: 3rem;
  }
  .timeline-container {
    margin: 0 10px;
    padding: 0 0 0 16px;
  }
  .timeline-item {
    padding-left: 22px;
  }
  .timeline-dot {
    left: -13px;
    width: 16px;
    height: 16px;
  }
  .timeline-date {
    font-size: 1.4rem;
    gap: 8px;
  }
  .timeline-content h3 {
    font-size: 1.7rem;
  }
  .timeline-content p {
    font-size: 1.3rem;
  }
}