/* ===== Variables ===== */
:root {
  --color-background: #f8f9fa;
  --color-text: #1a1a1a;
  --color-accent: #0b5cad;
  --color-dark: #1b2a41;
  --color-light: #ffffff;
  --color-border: #cccccc;
  --color-section: #ffffff;
  --color-muted: #555555;
}
/* ===== Base styles ===== */
body {
  background-color: var(--color-background);
  color: var(--color-text);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  margin: 0;
  padding: 0;
}
h2, h3 {
  color: var(--color-accent);
}
a {
  color: var(--color-accent);
}
img {
  max-width: 100%;
  height: auto;
}
/* ===== Header ===== */
header {
  background-color: var(--color-dark);
  background-image: linear-gradient(135deg, var(--color-dark), var(--color-accent));
  padding: 20px;
  text-align: center;
  border-bottom: 3px solid var(--color-accent);
}
header h1 a {
  color: var(--color-light);
  text-decoration: none;
}
header p {
  color: var(--color-light);
  font-size: 1.1rem;
  letter-spacing: 0.5px;
  margin: 12px 0;
}
header img {
  display: block;
  margin: 0 auto;
}
/* ===== Navigation ===== */
nav ul {
  list-style-type: none;
  padding: 0;
}
nav li {
  display: inline;
  margin-right: 10px;
}
nav a {
  display: inline-block;
  padding: 8px 16px;
  color: var(--color-light);
  text-decoration: none;
  border-radius: 6px;
}
nav a:hover {
  background-color: var(--color-accent);
}
.current-page {
  background-color: var(--color-light);
  color: var(--color-dark);
}
.current-page:hover {
  background-color: var(--color-light);
  color: var(--color-dark);
}
/* ===== Main content ===== */
main {
  max-width: 800px;
  margin: 0 auto;
  padding: 20px;
}
section {
  margin-bottom: 10px;
  background-color: var(--color-section);
  border: 1px solid var(--color-border);
  padding: 15px;
}
/* ===== About ===== */
.profile-photo {
  width: 150px;
  height: auto;
  border-radius: 50%;
  display: block;
  margin: 0 auto 10px auto;
}
/* ===== Projects ===== */
.project-card {
  border: 1px solid var(--color-border);
  padding: 10px;
  margin-bottom: 10px;
}
figure {
  margin: 0;
}
.project-screenshot {
  border-radius: 10px;
  border: 1px solid var(--color-border);
}
figcaption {
  color: var(--color-muted);
  font-size: 0.9rem;
  margin-top: 8px;
}
/* ===== Skills ===== */
dt {
  font-weight: bold;
}
dd {
  margin: 0 0 12px 0px;
}
/* ===== Education table ===== */
table {
  width: 100%;
  border-collapse: collapse;
}
td, th {
  border: 1px solid var(--color-border);
  padding: 4px;
  text-align: left;
  font-size: 0.85rem;
}
th {
  background-color: var(--color-accent);
  color: var(--color-light);
}
caption {
  font-weight: bold;
  padding-bottom: 8px;
}
.certificate-link {
  display: block;
  margin-bottom: 10px;
}
/* ===== Footer ===== */
footer {
  background-color: var(--color-dark);
  color: var(--color-light);
  padding: 20px;
  text-align: center;
}