/* Reset & Base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: 'Montserrat', sans-serif;
  background: linear-gradient(to right, #0f2027, #203a43, #2c5364);
  color: #f0f0f0;
  line-height: 1.8;
  padding-bottom: 4rem;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
header, .header {
  text-align: center;
  padding: 5rem 2rem 3rem;
  font-size: 1rem;
  color: #b4ff39;
}
header h1 {
  font-size: 3.2rem;
  margin-bottom: 1rem;
  letter-spacing: 1px;
}
header p {
  font-size: 1.3rem;
  color: #dcdcdc;
}

/* Footer */
footer, .footer {
  text-align: center;
  padding: 3rem 2rem;
  font-size: 1rem;
  color: #ffffff;
  background: rgba(68, 114, 128, 0.5);
  margin-top: auto;
}

/* Navigation */
nav {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 2rem;
  margin: 3rem 0;
}
nav a {
  color: #f0f0f0;
  text-decoration: none;
  font-weight: 600;
  padding-bottom: 6px;
  border-bottom: 2px solid transparent;
  transition: border-color 0.3s ease;
}
nav a:hover {
  border-bottom: 2px solid #00c2ff;
}

/* Sections */
main {
  max-width: 1000px;
  margin: auto;
  padding: 3rem 2rem;
}
section {
  margin-bottom: 4rem;
}
.card {
  background: rgba(0, 194, 255, 0.1);
  padding: 2.5rem;
  border-radius: 30px;
  box-shadow: 0 6px 20px rgba(0, 194, 255, 0.3);
  transition: transform 0.4s ease, box-shadow 0.3s ease;
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 8px 24px rgba(0, 194, 255, 0.5);
}
.card p {
  text-indent: 2em;
}

/* Lists */
ul {
  list-style: none;
  padding-left: 1.5rem;
  margin-top: 1rem;
}
ul li {
  margin-bottom: 1rem;
}
ul li::before {
  content: "▹";
  color: #b4ff39;
  margin-right: 0.6rem;
}

/* Buttons */
.btn {
  display: inline-block;
  background: #b4ff39;
  color: #1e3c72;
  padding: 1rem 2rem;
  border-radius: 30px;
  font-weight: bold;
  text-decoration: none;
  transition: background 0.3s ease, color 0.3s ease;
  margin-top: 2rem;
}
.btn:hover {
  background: #00c2ff;
  color: #ffffff;
}

.btn-inline {
  display: inline-block;
  background: #00c2ff;
  color: #1e3c72;
  padding: 0.4rem 1rem;
  border-radius: 20px;
  font-weight: bold;
  text-decoration: none;
  transition: background 0.3s ease;
}
.btn-inline:hover {
  background: #00a3d6;
}

/* Responsive */
@media (max-width: 768px) {
  header h1 {
    font-size: 2.4rem;
  }
  nav {
    flex-direction: column;
    gap: 1.2rem;
  }
  .card {
    padding: 2rem;
  }
}

/* About Section */
.about-container {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  flex-wrap: wrap;
}
.profile-pic {
  width: 180px;
  height: 250px;
  border-radius: 10%;
  object-fit: cover;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.4);
}
.bio-text {
  flex: 1;
  min-width: 280px;
}
.bio-text h2 {
  margin-bottom: 1rem;
}
.bio-text p {
  margin-bottom: 1.5rem;
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 6rem 2rem 3rem;
  background: rgba(0, 194, 255, 0.1);
}
.hero-title {
  font-size: 3.5rem;
  margin-bottom: 1rem;
}
.hero-subtitle {
  font-size: 1.4rem;
  color: #dcdcdc;
}

/* Intro Section */
.intro-section {
  text-align: center;
  padding: 3rem 2rem;
  max-width: 800px;
  margin: auto;
}
.intro-text {
  font-size: 1.2rem;
  margin-bottom: 2rem;
  line-height: 1.8;
}

/* Go to Top Button */
.go-top {
  position: fixed;
  bottom: 80px;
  right: 20px;
  background: #1e3c72;
  color: #fff;
  padding: 0.6rem 1rem;
  border-radius: 30px;
  font-weight: bold;
  text-decoration: none;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  transition: opacity 0.3s ease;
  opacity: 0;
  pointer-events: none;
  z-index: 998;
}
.go-top.show {
  opacity: 1;
  pointer-events: auto;
}
.go-top:hover {
  background: #16305d;
}

/* Others */
.centered-section {
  text-align: center;
  margin: 3rem 0;
}

html {
  scroll-behavior: smooth;
}