:root {
  --navy: #1b2a4a;
  --navy-dark: #101a30;
  --accent: #c98a3e;
  --text: #2a2f38;
  --muted: #6b7280;
  --bg: #f7f7f5;
  --card-bg: #ffffff;
  --border: #e5e5e0;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Segoe UI', Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

.container {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--navy), var(--navy-dark));
  color: #fff;
  padding: 60px 0 40px;
  text-align: center;
}

.hero h1 {
  margin: 0 0 8px;
  font-size: 2.4rem;
  letter-spacing: 0.5px;
}

.hero .tagline {
  margin: 0 0 4px;
  font-size: 1.1rem;
  color: var(--accent);
  font-weight: 600;
}

.hero .location {
  margin: 0 0 16px;
  color: #cfd6e4;
  font-size: 0.95rem;
}

.contact-links a {
  color: #fff;
  text-decoration: none;
  margin: 0 10px;
  border-bottom: 1px solid var(--accent);
  padding-bottom: 2px;
}

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

/* Nav */
.navbar {
  background: #fff;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.nav-links {
  display: flex;
  justify-content: center;
  gap: 28px;
  padding: 14px 24px;
  flex-wrap: wrap;
}

.nav-links a {
  color: var(--navy);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.3px;
}

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

/* Main sections */
main { padding: 40px 24px 20px; }

section { margin-bottom: 48px; }

h2 {
  font-size: 1.4rem;
  color: var(--navy);
  border-bottom: 2px solid var(--accent);
  padding-bottom: 8px;
  margin-bottom: 20px;
}

/* Skills */
.skills-grid {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.skills-grid li {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  padding: 10px 14px;
  border-radius: 4px;
  font-size: 0.92rem;
}

/* Experience */
.job {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 20px 22px;
  margin-bottom: 18px;
}

.job-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 6px;
}

.job-header h3 {
  margin: 0;
  color: var(--navy);
  font-size: 1.1rem;
}

.job-date {
  color: var(--accent);
  font-weight: 600;
  font-size: 0.85rem;
  white-space: nowrap;
}

.job-company {
  margin: 4px 0 12px;
  color: var(--muted);
  font-style: italic;
  font-size: 0.92rem;
}

.job ul {
  margin: 0;
  padding-left: 20px;
}

.job li {
  margin-bottom: 6px;
  font-size: 0.95rem;
}

/* Education */
.edu-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-left: 3px solid var(--navy);
  border-radius: 4px;
  padding: 14px 18px;
  margin-bottom: 12px;
}

.edu-item h3 {
  margin: 0 0 4px;
  font-size: 1rem;
  color: var(--navy);
}

.edu-item p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

/* Certifications */
.cert-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.cert-list li {
  background: var(--card-bg);
  border: 1px solid var(--border);
  padding: 10px 16px;
  border-radius: 4px;
  margin-bottom: 8px;
  font-size: 0.92rem;
}

/* Contact */
#contact p { margin: 6px 0; }
#contact a { color: var(--navy); font-weight: 600; }

/* Footer */
footer {
  background: var(--navy-dark);
  color: #cfd6e4;
  text-align: center;
  padding: 20px 0;
  font-size: 0.85rem;
  margin-top: 40px;
}

/* Back to top button */
#backToTop {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: none;
  background: var(--navy);
  color: #fff;
  font-size: 1.3rem;
  line-height: 1;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.25s ease, transform 0.25s ease, background 0.2s ease;
  z-index: 20;
}

#backToTop.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

#backToTop:hover {
  background: var(--accent);
}

/* Responsive */
@media (max-width: 600px) {
  .skills-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 1.9rem; }
}