:root {
  --bg: #f3f4f6;          /* Light gray/blue tint background */
  --text: #334155;        /* Slate gray for better readability */
  --heading: #0f172a;     /* Near black for headings */
  --brand: #1e3a8a;       /* Deep Academic Blue */
  --brand-dark: #172554;  /* Darker Navy for Nav/Footer */
  --accent: #f59e0b;      /* Amber/Gold for subtle highlights */
  --white: #ffffff;
  --link: #2563eb;        /* Standard accessible blue for links */
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
}

/* Header */
header {
  background: var(--brand);
  color: var(--white);
  padding: 2.5rem 1rem;
  text-align: center;
  border-bottom: 4px solid var(--brand-dark);
}
header h1 { margin: 0; font-size: 2.5rem; font-weight: 700; color: var(--white); }
header p { margin: 0.5rem 0 0; opacity: 0.9; font-size: 1.1rem; }

/* Navigation */
nav {
  background: var(--brand-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
}

nav a, nav button {
  color: rgba(255,255,255,0.85);
  text-decoration: none;
  padding: 1rem 1.25rem;
  border: 0;
  background: transparent;
  font: inherit;
  cursor: pointer;
  font-weight: 500;
  transition: all 0.2s ease;
  border-bottom: 3px solid transparent;
}

nav a:hover, nav button:hover, nav a:focus-visible, nav button:focus-visible {
  background: rgba(255,255,255,0.1);
  color: var(--white);
  outline: none;
}

nav a.active, nav button.active {
  color: var(--white);
  border-bottom-color: var(--accent);
}

/* Dropdown */
.dropdown { position: relative; }
.dropdown-content {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  background: var(--white);
  color: var(--text);
  border: 1px solid #e5e7eb;
  border-radius: 0 0 8px 8px;
  padding: 0.5rem 0;
  box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1);
  display: none;
}
.dropdown.open .dropdown-content { display:block; }
.dropdown-content a {
  display: block;
  padding: 0.75rem 1.25rem;
  color: var(--text);
  transition: background 0.15s;
}
.dropdown-content a:hover, .dropdown-content a:focus-visible {
  background: #f3f4f6;
  color: var(--brand);
}

/* Main Container */
.container {
  max-width: 1000px;
  margin: 3rem auto;
  padding: 3rem;
  background: var(--white);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  border-radius: 12px;
}

/* Global Elements */
a { color: var(--link); text-decoration: none; font-weight: 500; }
a:hover { text-decoration: underline; color: var(--brand); }
img { max-width: 100%; height: auto; border-radius: 8px; }

/* Headings */
h1, h2, h3 {
  font-family: Georgia, Cambria, "Times New Roman", serif;
  color: var(--heading);
}

h2 {
  display: block;
  border-bottom: 2px solid #e5e7eb;
  padding-bottom: 0.5rem;
  margin-bottom: 1.5rem;
  margin-top: 2.5rem;
  position: relative;
}
/* Small accent line under headings */
h2::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 60px;
  height: 2px;
  background: var(--accent);
}

h3 {
  color: var(--brand);
  margin-bottom: 0.75rem;
  margin-top: 2rem;
  font-size: 1.3rem;
}

/* CV Specifics */
.cv-item { margin-bottom: 2rem; }
.cv-header { display: flex; justify-content: space-between; font-weight: 700; flex-wrap: wrap; font-size: 1.1rem; color: var(--heading); }
.cv-date { white-space: nowrap; margin-left: 1rem; color: var(--text); font-weight: normal; opacity: 0.8; }
.cv-sub { font-style: italic; margin-bottom: 0.25rem; color: #4b5563; }
.cv-list { margin-top: 0.5rem; padding-left: 1.2rem; }
.cv-list li { margin-bottom: 0.4rem; }

/* Skill Badges */
.badge {
  display: inline-block;
  background: #e2e8f0;
  color: #475569;
  padding: 0.2rem 0.7rem;
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-right: 0.5rem;
  margin-bottom: 0.5rem;
}

/* Home/News Specifics */
.btn {
  display: inline-block;
  background: var(--brand);
  color: var(--white);
  padding: 0.6rem 1.2rem;
  text-decoration: none;
  border-radius: 6px;
  font-weight: 600;
  margin-top: 0.5rem;
  transition: transform 0.1s, background 0.2s;
}
.btn:hover {
  background: var(--brand-dark);
  text-decoration: none;
  color: var(--white);
  transform: translateY(-1px);
}

.news-item {
  margin-bottom: 1rem;
  padding: 1rem;
  background: #f8fafc;
  border-left: 4px solid var(--brand);
  border-radius: 4px;
}
.news-date {
  font-weight: 700;
  color: var(--brand);
  margin-right: 0.75rem;
  font-family: 'Segoe UI', sans-serif;
}

/* Layout Utilities */
.flex-layout {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  gap: 3rem;
  margin-top: 2rem;
  flex-wrap: wrap;
}

/* Profile Section Override */
.profile-section {
  margin-top: 0;
  margin-bottom: 3rem;
}

/* Figure/Image Containers */
.figure-container {
  text-align: center;
  margin: 2rem 0;
}

/* Footer */
footer {
  text-align: center;
  background: var(--brand-dark);
  color: rgba(255,255,255,0.6);
  padding: 2rem;
  margin-top: 4rem;
  font-size: 0.9rem;
}

/* Mobile */
@media (max-width: 768px) {
  .container { padding: 1.5rem; margin: 1rem; }
  nav { flex-wrap: wrap; padding: 0.5rem; }
  nav a, nav button { padding: 0.75rem; font-size: 0.9rem; }
  .dropdown { width: 100%; text-align: center; }
  .dropdown-content { position: static; width: 100%; box-shadow: none; border: 1px solid #e5e7eb; }
  .flex-layout { gap: 1.5rem; }
  header h1 { font-size: 2rem; }
}