:root {
  --bg: #f5f7fb;
  --card: #ffffff;
  --text: #172033;
  --muted: #667085;
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --border: #e4e7ec;
  --shadow: 0 18px 45px rgba(15, 23, 42, 0.08);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

a { color: inherit; text-decoration: none; }

.hero {
  background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 55%, #2563eb 100%);
  color: #fff;
  padding-bottom: 70px;
}

.navbar {
  max-width: 1120px;
  margin: 0 auto;
  padding: 22px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand { font-size: 1.25rem; font-weight: 800; letter-spacing: 0.3px; }
.nav-links { display: flex; gap: 22px; align-items: center; }
.nav-links a { opacity: 0.9; font-weight: 600; font-size: 0.95rem; }
.nav-links a:hover { opacity: 1; }
.menu-toggle { display: none; background: transparent; border: 0; color: #fff; font-size: 1.8rem; cursor: pointer; }

.hero-content {
  max-width: 1120px;
  margin: 45px auto 0;
  padding: 0 24px;
}
.eyebrow { text-transform: uppercase; letter-spacing: 1.5px; font-weight: 700; color: #bfdbfe; }
h1 { font-size: clamp(2.7rem, 7vw, 5.2rem); line-height: 1; margin: 12px 0 20px; }
.hero-text { max-width: 820px; font-size: 1.2rem; color: #e0e7ff; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin: 30px 0; }
.btn { border: 1px solid rgba(255,255,255,0.35); padding: 12px 18px; border-radius: 999px; font-weight: 700; cursor: pointer; }
.btn.primary { background: #fff; color: var(--primary-dark); border-color: #fff; }
.btn.secondary { background: rgba(255,255,255,0.12); color: #fff; }
.contact-grid { display: flex; gap: 18px; flex-wrap: wrap; color: #dbeafe; font-weight: 600; }

main { max-width: 1120px; margin: -32px auto 0; padding: 0 24px 50px; }
.section { margin-bottom: 52px; scroll-margin-top: 24px; }
.section-title { margin-bottom: 18px; }
.section-title p { color: var(--primary); text-transform: uppercase; font-weight: 800; letter-spacing: 1.2px; margin: 0; }
h2 { margin: 4px 0 0; font-size: clamp(1.8rem, 4vw, 2.5rem); }
h3 { margin: 0 0 8px; }
.card, .skill-card, .timeline-card, .project-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 22px;
  box-shadow: var(--shadow);
}
.card { padding: 28px; font-size: 1.05rem; }
.skills-grid, .project-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.skill-card, .project-card { padding: 22px; }
.skill-card h3, .project-card h3 { color: var(--primary-dark); }
.timeline-card { padding: 26px; margin-bottom: 18px; }
.timeline-header { display: flex; justify-content: space-between; gap: 20px; border-bottom: 1px solid var(--border); padding-bottom: 14px; margin-bottom: 14px; }
.timeline-header p, .muted { color: var(--muted); margin: 0; }
.timeline-header span { color: var(--primary); font-weight: 800; white-space: nowrap; }
ul { padding-left: 20px; margin-bottom: 0; }
li { margin-bottom: 8px; }
.education-card h3 { color: var(--primary-dark); }
footer { max-width: 1120px; margin: 0 auto; padding: 30px 24px 45px; display: flex; justify-content: space-between; gap: 16px; color: var(--muted); }
footer a { color: var(--primary); font-weight: 700; }

@media (max-width: 820px) {
  .menu-toggle { display: block; }
  .nav-links { display: none; position: absolute; left: 24px; right: 24px; top: 68px; padding: 18px; background: rgba(15, 23, 42, 0.95); border-radius: 16px; flex-direction: column; align-items: flex-start; }
  .nav-links.open { display: flex; }
  .skills-grid, .project-grid { grid-template-columns: 1fr; }
  .timeline-header { flex-direction: column; }
  footer { flex-direction: column; }
}

@media print {
  .navbar, .hero-actions, footer { display: none; }
  .hero { color: #000; background: #fff; padding-bottom: 20px; }
  main { margin: 0; }
  .card, .skill-card, .timeline-card, .project-card { box-shadow: none; break-inside: avoid; }
}