:root {
  --accent: #2563eb;
  --accent-light: #3b82f6;
  --bg: #f0f4ff;
  --bg-card: #ffffff;
  --bg-navbar: #ffffff;
  --text: #1e293b;
  --text-muted: #64748b;
  --border: rgba(0, 0, 0, 0.08);
}

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: 'Segoe UI', system-ui, sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

/* ── Navbar ── */
.navbar {
  background-color: var(--bg-navbar);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 6px rgba(0, 0, 0, 0.06);
}

.navbar-brand {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text) !important;
  letter-spacing: -0.3px;
}

.navbar-brand span {
  color: var(--accent);
}

.nav-link {
  color: var(--text-muted) !important;
  font-size: 0.9rem;
  transition: color 0.2s;
}

.nav-link:hover,
.nav-link.active {
  color: var(--accent) !important;
}

/* ── Hero ── */
.hero {
  padding: 7rem 0 5rem;
  background: linear-gradient(135deg, #e8f0fe 0%, #f0f4ff 60%, #faf5ff 100%);
}

.hero .greeting {
  color: var(--accent);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  color: var(--text);
}

.hero .lead {
  color: var(--text-muted);
  max-width: 520px;
}

/* ── Cards ── */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.12);
  border-color: rgba(37, 99, 235, 0.3);
}

.card-title {
  color: var(--text);
  font-weight: 600;
}

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

/* ── Section headings ── */
.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text);
}

.section-title span {
  color: var(--accent);
}

.section-divider {
  width: 40px;
  height: 3px;
  background: var(--accent);
  border-radius: 2px;
  margin: 0.5rem 0 2rem;
}

/* ── Skill badges ── */
.badge-skill {
  background-color: #eff6ff;
  color: var(--accent);
  border: 1px solid #bfdbfe;
  border-radius: 6px;
  padding: 0.35em 0.75em;
  font-size: 0.82rem;
  font-weight: 500;
}

/* ── Contact links ── */
.contact-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  text-decoration: none;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
  transition: border-color 0.2s, box-shadow 0.2s, color 0.2s;
}

.contact-link:hover {
  border-color: rgba(37, 99, 235, 0.35);
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.1);
  color: var(--accent);
}

.contact-link .icon {
  font-size: 1.4rem;
  width: 2rem;
  text-align: center;
}

/* ── Footer ── */
footer {
  background-color: var(--bg-navbar);
  border-top: 1px solid var(--border);
  padding: 1.5rem 0;
  color: var(--text-muted);
  font-size: 0.85rem;
}

footer a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
}

footer a:hover {
  color: var(--accent);
}

/* ── Project tags ── */
.project-tag {
  font-size: 0.75rem;
  padding: 0.2em 0.6em;
  border-radius: 4px;
  background-color: #f1f5f9;
  color: var(--text-muted);
}

/* ── Buttons ── */
.btn-primary {
  font-weight: 600;
  letter-spacing: 0.02em;
  background-color: var(--accent);
  border-color: var(--accent);
}

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

.btn-outline-secondary {
  border-color: #cbd5e1;
  color: var(--text-muted);
}

.btn-outline-secondary:hover {
  background-color: #f1f5f9;
  border-color: #94a3b8;
  color: var(--text);
}