:root {
  --navy:       #0a1628;
  --navy2:      #112240;
  --accent:     #2563eb;
  --accent2:    #60a5fa;
  --text:       #e2e8f0;
  --muted:      #94a3b8;
  --card:       #1e3a5f;
  --border:     #1e40af;
  --radius:     10px;
  --transition: 0.2s ease;
}

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

html {
  scroll-behavior: smooth;
}

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

/* Navigation */

#navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(10, 22, 40, 0.95);
  backdrop-filter: blur(10px);
  z-index: 100;
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent2);
  letter-spacing: 1px;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color var(--transition);
}

.nav-links a:hover {
  color: var(--accent2);
}

/* Hero */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy2) 100%);
  padding: 6rem 2rem 4rem;
}

.hero-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 4rem;
  flex-wrap: wrap;
}

.hero-text h1 {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 0.5rem;
}

.tagline {
  color: var(--muted);
  font-size: 1.2rem;
  margin-bottom: 1.5rem;
}

.bio {
  color: var(--text);
  max-width: 560px;
  margin-bottom: 2rem;
  font-size: 1rem;
}

.hero-links {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.avatar {
  width: 220px;
  height: 220px;
  border-radius: 50%;
  border: 4px solid var(--accent);
  background: linear-gradient(135deg, var(--card), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  font-weight: 800;
  color: #fff;
  flex-shrink: 0;
}

/* Buttons */

.btn {
  padding: 0.65rem 1.4rem;
  border-radius: 6px;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  transition: all var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: #1d4ed8;
}

.btn-outline {
  border: 1.5px solid var(--accent2);
  color: var(--accent2);
}

.btn-outline:hover {
  background: var(--accent2);
  color: var(--navy);
}

/* Sections */

.section {
  padding: 5rem 2rem;
}

.section.alt {
  background: var(--navy2);
}

.section-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.section-title {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.section-divider {
  width: 50px;
  height: 3px;
  background: var(--accent);
  border-radius: 2px;
  margin-bottom: 2.5rem;
}

.accent {
  color: var(--accent2);
}

/* About */

.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 2rem;
}

.about-card {
  background: var(--card);
  padding: 1.5rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.about-card h3 {
  color: var(--accent2);
  margin-bottom: 0.75rem;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.about-card p,
.about-card li {
  color: var(--muted);
  font-size: 0.95rem;
}

.about-card ul {
  list-style: none;
}

.about-card ul li + li {
  margin-top: 0.4rem;
}

/* Skills */

.skills-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.skill-tag {
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--accent2);
  padding: 0.4rem 1rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 500;
  transition: all var(--transition);
  cursor: default;
}

.skill-tag:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

/* Experience */

.timeline {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.timeline-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  border-left: 4px solid var(--accent);
}

.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.timeline-header h3 {
  font-size: 1.05rem;
  color: var(--text);
}

.timeline-date {
  color: var(--accent2);
  font-size: 0.85rem;
  font-weight: 600;
}

.timeline-company {
  color: var(--accent2);
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.timeline-desc {
  color: var(--muted);
  font-size: 0.9rem;
}

.timeline-bullets {
  list-style: none;
  margin-top: 0.5rem;
}

.timeline-bullets li {
  color: var(--muted);
  font-size: 0.9rem;
  padding-left: 1rem;
  position: relative;
}

.timeline-bullets li + li {
  margin-top: 0.4rem;
}

.timeline-bullets li::before {
  content: "▸";
  color: var(--accent);
  position: absolute;
  left: 0;
}

/* Cards — Projects, Courses */

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: transform var(--transition), border-color var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--accent2);
}

.card-tag {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 0.75rem;
}

.card h3 {
  font-size: 1.05rem;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.card p {
  color: var(--muted);
  font-size: 0.9rem;
}

.card-bullets {
  list-style: none;
  margin-top: 0.25rem;
}

.card-bullets li {
  color: var(--muted);
  font-size: 0.9rem;
  padding-left: 1rem;
  position: relative;
}

.card-bullets li + li {
  margin-top: 0.4rem;
}

.card-bullets li::before {
  content: "▸";
  color: var(--accent);
  position: absolute;
  left: 0;
}

.card-links {
  margin-top: 1rem;
  display: flex;
  gap: 0.75rem;
}

.card-link {
  color: var(--accent2);
  font-size: 0.85rem;
  text-decoration: none;
}

.card-link:hover {
  text-decoration: underline;
}

/* Contact */

.contact-intro {
  color: var(--muted);
  margin-bottom: 2rem;
  max-width: 500px;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
}

.contact-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  text-decoration: none;
  transition: all var(--transition);
}

.contact-card:hover {
  border-color: var(--accent2);
  transform: translateY(-2px);
}

.contact-icon {
  font-size: 1.5rem;
}

.contact-label {
  color: var(--muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.contact-value {
  color: var(--accent2);
  font-size: 0.9rem;
  font-weight: 600;
}

/* Footer */

footer {
  background: var(--navy);
  text-align: center;
  padding: 2rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.85rem;
}

/* Responsive */

@media (max-width: 700px) {
  .hero-text h1    { font-size: 2rem; }
  .about-grid      { grid-template-columns: 1fr; }
  .hero-inner      { flex-direction: column; text-align: center; }
  .hero-links      { justify-content: center; }
  .nav-links       { gap: 0.75rem; }
}