/* Blue Color Palette Variables */
:root {
  --navy-dark: #03045e;
  --navy: #023e8a;
  --blue-mid: #0077b6;
  --blue-bright: #00b4d8;
  --sky-light: #90e0ef;
  --sky-lightest: #caf0f8;
  --white: #ffffff;
  --dark-bg: #00171f;
}

/* Reset & Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: var(--white);
  background-color: var(--navy-dark);
}

a {
  color: var(--sky-light);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--blue-bright);
}

/* Navigation Bar */
.navbar {
  background-color: var(--dark-bg);
  position: sticky;
  top: 0;
  z-index: 1000;
  padding: 0 2rem;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
}

.navbar .logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--white);
  padding: 1rem 0;
}

.navbar .logo span {
  color: var(--blue-bright);
}

.navbar ul {
  display: flex;
  list-style: none;
  gap: 0.5rem;
}

.navbar ul li a {
  display: block;
  padding: 1rem 1.5rem;
  color: var(--white);
  font-weight: 500;
  border-radius: 4px;
  transition: background-color 0.3s ease, color 0.3s ease;
}

.navbar ul li a:hover,
.navbar ul li a.active {
  background-color: var(--blue-mid);
  color: var(--white);
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--navy-dark) 0%, var(--navy) 50%, var(--blue-mid) 100%);
  min-height: 90vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 4rem 2rem;
}

.hero h1 {
  font-size: 3.5rem;
  margin-bottom: 1rem;
  animation: fadeInUp 0.8s ease;
}

.hero h1 span {
  color: var(--blue-bright);
}

.hero p {
  font-size: 1.25rem;
  max-width: 600px;
  margin-bottom: 2rem;
  color: var(--sky-lightest);
  animation: fadeInUp 0.8s ease 0.2s both;
}

.cta-button {
  display: inline-block;
  padding: 1rem 2.5rem;
  background-color: var(--blue-bright);
  color: var(--navy-dark);
  font-weight: bold;
  font-size: 1.1rem;
  border-radius: 50px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  animation: fadeInUp 0.8s ease 0.4s both;
}

.cta-button:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(0, 180, 216, 0.4);
  color: var(--navy-dark);
}

/* Section Styles */
section {
  padding: 5rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

section h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  color: var(--white);
  text-align: center;
}

section h2::after {
  content: '';
  display: block;
  width: 80px;
  height: 4px;
  background: var(--blue-bright);
  margin: 1rem auto 2rem;
  border-radius: 2px;
}

/* Featured Projects Grid */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.project-card {
  background: linear-gradient(145deg, var(--navy) 0%, var(--navy-dark) 100%);
  border-radius: 12px;
  padding: 2rem;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 1px solid rgba(0, 180, 216, 0.2);
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 15px 40px rgba(0, 119, 182, 0.3);
}

.project-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--blue-bright);
}

.project-card p {
  color: var(--sky-lightest);
  margin-bottom: 1.5rem;
}

.project-card .links {
  display: flex;
  gap: 1rem;
}

.project-card .links a {
  padding: 0.5rem 1rem;
  background-color: rgba(0, 180, 216, 0.2);
  border-radius: 6px;
  font-size: 0.9rem;
  transition: background-color 0.3s ease;
}

.project-card .links a:hover {
  background-color: var(--blue-bright);
  color: var(--navy-dark);
}

/* About Section */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.about-text p {
  margin-bottom: 1.5rem;
  color: var(--sky-lightest);
  font-size: 1.1rem;
}

.skills-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1rem;
}

.skill-tag {
  background-color: var(--blue-mid);
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.9rem;
  color: var(--white);
}

.contact-info {
  background: linear-gradient(145deg, var(--navy) 0%, var(--navy-dark) 100%);
  padding: 2rem;
  border-radius: 12px;
  border: 1px solid rgba(0, 180, 216, 0.2);
}

.contact-info h3 {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  color: var(--blue-bright);
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
  padding: 0.75rem;
  background-color: rgba(0, 119, 182, 0.2);
  border-radius: 8px;
  transition: background-color 0.3s ease;
}

.contact-item:hover {
  background-color: rgba(0, 180, 216, 0.3);
}

.contact-item svg {
  width: 24px;
  height: 24px;
  fill: var(--blue-bright);
}

/* Footer */
footer {
  background-color: var(--dark-bg);
  padding: 2rem;
  text-align: center;
  margin-top: 4rem;
}

footer p {
  color: var(--sky-lightest);
}

footer .social-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-top: 1rem;
}

footer .social-links a {
  color: var(--sky-light);
  transition: color 0.3s ease;
}

footer .social-links a:hover {
  color: var(--blue-bright);
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Responsive Design */
@media (max-width: 768px) {
  .navbar .container {
    flex-direction: column;
    padding: 0.5rem 0;
  }

  .navbar ul {
    flex-wrap: wrap;
    justify-content: center;
    padding-bottom: 0.5rem;
  }

  .navbar ul li a {
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
  }

  .hero {
    min-height: 80vh;
    padding: 3rem 1.5rem;
  }

  .hero h1 {
    font-size: 2.5rem;
  }

  .hero p {
    font-size: 1.1rem;
  }

  section {
    padding: 3rem 1.5rem;
  }

  section h2 {
    font-size: 2rem;
  }

  .about-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 2rem;
  }

  .cta-button {
    padding: 0.875rem 2rem;
    font-size: 1rem;
  }

  .project-card {
    padding: 1.5rem;
  }

  .project-card .links {
    flex-direction: column;
  }
}