/* LIGHT & DARK THEMES */
body.light {
  --bg: #ffffff;
  --text: #111827;
  --text-muted: #4b5563;
  --card-bg: #f3f4f6;
  --accent: #2563eb;
  --border: #d1d5db;
}

body.dark {
  --bg: #050816;
  --text: #e5e7eb;
  --text-muted: #9ca3af;
  --card-bg: #111827;
  --accent: #3b82f6;
  --border: #1f2937;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, sans-serif;
}

/* NAVBAR */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
}

.nav-brand {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 1px;
}

.nav-links {
  display: flex;
  gap: 1.2rem;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-muted);
}

.nav-toggle {
  display: none;
  font-size: 1.6rem;
  background: none;
  border: none;
}

.theme-toggle {
  font-size: 1.4rem;
  background: none;
  border: none;
  cursor: pointer;
}

/* HERO */
.hero {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  padding: 2rem;
  gap: 2rem;
}

.hero-name {
  font-size: 2.4rem;
  font-weight: 800;
}

.hero-tagline {
  font-size: 1.2rem;
  color: var(--accent);
}

.hero-sub {
  font-size: 1rem;
  color: var(--text-muted);
}

.hero-image {
  width: 240px;
  height: 240px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--accent);
}

/* SECTIONS */
.section {
  padding: 2rem;
  max-width: 1100px;
  margin: auto;
}

.section h2 {
  font-size: 1.6rem;
  margin-bottom: 1rem;
}

/* CARDS */
.cards-grid,
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.card,
.project-card {
  background: var(--card-bg);
  padding: 1.2rem;
  border-radius: 10px;
  border: 1px solid var(--border);
}

.project-icon {
  width: 40px;
  height: 40px;
  margin-bottom: 0.6rem;
}

/* SKILLS */
.skills-layout {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.skill-block {
  background: var(--card-bg);
  padding: 1rem;
  border-radius: 10px;
  border: 1px solid var(--border);
}

/* TIMELINE */
.timeline-item {
  background: var(--card-bg);
  padding: 1rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  margin-bottom: 1rem;
}

/* CERTIFICATIONS */
.cert-list {
  display: grid;
  gap: 1rem;
}

.cert-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--card-bg);
  padding: 1rem;
  border-radius: 10px;
  border: 1px solid var(--border);
}

.cert-logo {
  width: 40px;
  height: 40px;
}

/* CONTACT */
.contact-list a {
  color: var(--accent);
  text-decoration: none;
}

/* FOOTER */
.site-footer {
  text-align: center;
  padding: 1.5rem;
  color: var(--text-muted);
}

/* MOBILE */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    flex-direction: column;
    background: var(--bg);
    padding: 1rem;
    position: absolute;
    right: 1rem;
    top: 60px;
    border: 1px solid var(--border);
    border-radius: 10px;
  }

  .nav-links.show {
    display: flex;
  }

  .nav-toggle {
    display: block;
  }

  .hero {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-image {
    margin: auto;
  }
}