/* Base styles */
:root {
  --primary-color: #112b3c;
  --secondary-color: #205375;
  --accent-color: #b99c59;
  --text-color: #333333;
  --light-bg: #f9f9f9;
  --white: #ffffff;
  --gray: #6c757d;
  --light-gray: #e9ecef;
  --transition: all 0.3s ease;
}

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

body {
  font-family: "Source Sans 3", sans-serif;
  color: var(--text-color);
  line-height: 1.6;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: "Playfair Display", serif;
  font-weight: 600;
}

.section {
  padding: 80px 0;
}

.section-heading {
  margin-bottom: 1.5rem;
  color: var(--primary-color);
}

.divider {
  height: 0.2rem;
  max-width: 3.25rem;
  margin: 1.5rem auto;
  background-color: var(--accent-color);
  opacity: 1;
}

/* Navigation */
#mainNav {
  background-color: rgba(255, 255, 255, 0.95);
  box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
  transition: var(--transition);
}

.navbar-brand {
  font-family: "Playfair Display", serif;
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--primary-color);
}

.nav-link {
  font-weight: 500;
  color: var(--primary-color);
  padding: 0.75rem 1rem;
  transition: var(--transition);
}

.nav-link:hover {
  color: var(--accent-color);
}

/* Header */
.masthead {
  height: 100vh;
  min-height: 500px;
  background-image: linear-gradient(
      rgba(17, 43, 60, 0.7),
      rgba(17, 43, 60, 0.7)
    ),
    url("https://images.unsplash.com/photo-1450101499163-c8848c66ca85?ixlib=rb-1.2.1&auto=format&fit=crop&w=1950&q=80");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
}

.name {
  font-size: 4rem;
  font-weight: 700;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.subtitle {
  font-size: 1.5rem;
  margin-top: 1.5rem;
}

/* About Section */
.card {
  border: none;
  box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

.icon-primary {
  color: var(--primary-color);
}

/* Education Section */
.education-item {
  background-color: var(--white);
  padding: 2rem;
  border-radius: 0.25rem;
  box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
  margin-bottom: 1.5rem;
}

.institution {
  color: var(--gray);
  font-style: italic;
}

.thesis {
  font-weight: 500;
  color: var(--primary-color);
}

/* Experience Section */
.timeline {
  position: relative;
  padding: 0;
  list-style: none;
}

.timeline:before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  margin-left: -1px;
  content: "";
  background-color: var(--light-gray);
}

.timeline-item {
  position: relative;
  margin-bottom: 2rem;
  min-height: 50px;
}

.timeline-badge {
  position: absolute;
  left: 50%;
  width: 50px;
  height: 50px;
  margin-left: -25px;
  text-align: center;
  color: var(--white);
  border: 3px solid var(--light-gray);
  border-radius: 100%;
  background-color: var(--primary-color);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
}

.timeline-panel {
  position: relative;
  float: left;
  width: 46%;
  padding: 1.5rem;
  text-align: right;
  background-color: var(--white);
  border-radius: 0.25rem;
  box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
}

.timeline-item:nth-child(even) .timeline-panel {
  float: right;
  text-align: left;
}

.timeline-item:nth-child(odd) .timeline-panel::before {
  right: -10px;
  left: auto;
  border-right-width: 0;
  border-left-width: 10px;
}

.timeline-heading h4 {
  margin-top: 0;
  color: var(--primary-color);
}

.timeline-heading h5 {
  font-style: italic;
  color: var(--secondary-color);
}

.timeline-heading .period {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gray);
}

.view-more-btn {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
  padding: 0.5rem 1.5rem;
  transition: var(--transition);
}

.view-more-btn:hover {
  background-color: var(--secondary-color);
  border-color: var(--secondary-color);
}

/* Publications Section */
.publication-card {
  transition: var(--transition);
}

.publication-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

.card-subtitle {
  color: var(--gray);
  font-style: italic;
}

/* Achievements Section */
.achievement-card {
  display: flex;
  background-color: var(--white);
  padding: 1.5rem;
  border-radius: 0.25rem;
  box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
  transition: var(--transition);
}

.achievement-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

.card-icon {
  min-width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--primary-color);
  color: var(--white);
  border-radius: 50%;
  margin-right: 1rem;
}

/* Skills Section */
.skill-item {
  margin-bottom: 1.5rem;
}

.progress {
  height: 10px;
  border-radius: 5px;
  background-color: var(--light-gray);
}

.progress-bar {
  background-color: var(--primary-color);
}

.language-item {
  transition: var(--transition);
}

.language-item:hover {
  transform: translateX(5px);
}

.language-icon {
  color: var(--primary-color);
}

/* Contact Section */
.contact-item {
  padding: 2rem;
  border-radius: 0.25rem;
  background-color: var(--white);
  box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
  height: 100%;
  transition: var(--transition);
}

.contact-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

.contact-item a {
  color: var(--text-color);
  text-decoration: none;
  transition: var(--transition);
}

.contact-item a:hover {
  color: var(--accent-color);
}

.social-icon {
  color: var(--primary-color);
  transition: var(--transition);
}

.social-icon:hover {
  color: var(--accent-color);
  transform: scale(1.1);
}

/* Footer */
.footer {
  padding: 1.5rem 0;
  background-color: var(--primary-color);
  color: var(--white);
}

/* Media Queries */
@media (max-width: 991.98px) {
  .timeline:before {
    left: 60px;
  }

  .timeline-badge {
    left: 60px;
  }

  .timeline-panel {
    width: calc(100% - 90px);
    float: right;
    text-align: left;
    margin-left: 90px;
  }

  .name {
    font-size: 3rem;
  }
}

@media (max-width: 767.98px) {
  .section {
    padding: 60px 0;
  }

  .name {
    font-size: 2.5rem;
  }

  .subtitle {
    font-size: 1.25rem;
  }

  .timeline:before {
    left: 40px;
  }

  .timeline-badge {
    left: 40px;
    width: 40px;
    height: 40px;
    margin-left: 0;
  }

  .timeline-panel {
    width: calc(100% - 70px);
    margin-left: 70px;
  }
}

@media (max-width: 575.98px) {
  .section {
    padding: 40px 0;
  }

  .name {
    font-size: 2rem;
  }

  .subtitle {
    font-size: 1rem;
  }
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fade-in {
  animation: fadeIn 1s ease;
}