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

:root {
  --primary: #0f1b2d;
  --accent: #ff9900;
  --text: #333;
  --light: #f5f7fa;
  --white: #fff;
}

body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; color: var(--text); background: var(--light); }

/* NAV */
nav {
  display: flex; justify-content: space-between; align-items: center;
  padding: 1rem 2rem; background: var(--primary); position: sticky; top: 0; z-index: 100;
}
.nav-brand { color: var(--accent); font-weight: 700; font-size: 1.2rem; }
.nav-links { display: flex; gap: 1.5rem; }
.nav-link {
  color: var(--white); text-decoration: none; padding: 0.5rem 1rem;
  border-radius: 4px; transition: background 0.3s;
}
.nav-link:hover, .nav-link.active { background: var(--accent); color: var(--primary); font-weight: 600; }

/* TABS */
.tab-content { display: none; min-height: calc(100vh - 120px); }
.tab-content.active { display: block; }

/* HOME */
.hero {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 4rem 2rem; text-align: center; min-height: calc(100vh - 120px);
  background: linear-gradient(135deg, var(--primary) 0%, #1a3a5c 100%); color: var(--white);
}
.photo-container {
  width: 200px; height: 200px; border-radius: 50%; overflow: hidden;
  border: 4px solid var(--accent); margin-bottom: 1.5rem;
}
.profile-photo { width: 100%; height: 100%; object-fit: cover; }
.hero h1 { font-size: 2.5rem; margin-bottom: 0.5rem; }
.hero .title { font-size: 1.2rem; color: var(--accent); margin-bottom: 1.5rem; }
.social-links { display: flex; gap: 1rem; margin-bottom: 2rem; }
.social-links a {
  color: var(--white); text-decoration: none; padding: 0.5rem 1.2rem;
  border: 1px solid var(--accent); border-radius: 20px; transition: all 0.3s;
}
.social-links a:hover { background: var(--accent); color: var(--primary); }
.visitor-counter {
  background: rgba(255,255,255,0.1); padding: 0.8rem 1.5rem;
  border-radius: 8px; font-size: 1rem;
}

/* RESUME */
.resume-container { max-width: 900px; margin: 0 auto; padding: 2rem; }
.resume-header { text-align: center; margin-bottom: 2rem; padding-bottom: 1rem; border-bottom: 3px solid var(--accent); }
.resume-header h1 { font-size: 2rem; color: var(--primary); }
.resume-header a { color: var(--accent); text-decoration: none; }
.resume-section { margin-bottom: 2rem; }
.resume-section h2 {
  color: var(--primary); border-bottom: 2px solid var(--accent);
  padding-bottom: 0.3rem; margin-bottom: 1rem; font-size: 1.3rem;
}
.skills-grid { display: grid; gap: 0.5rem; }
.skills-grid div { background: var(--white); padding: 0.8rem; border-radius: 6px; border-left: 3px solid var(--accent); }
.job { margin-bottom: 1.5rem; background: var(--white); padding: 1.2rem; border-radius: 8px; }
.job-header { display: flex; justify-content: space-between; align-items: flex-start; flex-wrap: wrap; margin-bottom: 0.5rem; }
.job-header h3 { color: var(--primary); }
.job-title { color: var(--accent); font-weight: 600; }
.job-meta { text-align: right; color: #666; font-size: 0.9rem; }
.job-meta span { display: block; }
.job ul, .certs { padding-left: 1.5rem; }
.job li, .certs li { margin-bottom: 0.4rem; line-height: 1.5; }
.education .job-header { background: var(--white); padding: 1rem; border-radius: 8px; margin-bottom: 0.8rem; }

/* PROJECTS */
.projects-container { max-width: 900px; margin: 0 auto; padding: 2rem; }
.projects-container h2 { color: var(--primary); margin-bottom: 1.5rem; font-size: 1.8rem; }
.project-card {
  background: var(--white); padding: 1.5rem; border-radius: 10px;
  margin-bottom: 1.5rem; border-left: 4px solid var(--accent);
  transition: transform 0.2s, box-shadow 0.2s;
}
.project-card:hover { transform: translateY(-3px); box-shadow: 0 6px 20px rgba(0,0,0,0.1); }
.project-card h3 { color: var(--primary); margin-bottom: 0.8rem; }
.project-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1rem; }
.project-tags span {
  background: var(--primary); color: var(--accent); padding: 0.3rem 0.8rem;
  border-radius: 15px; font-size: 0.8rem;
}
.project-card p { line-height: 1.6; color: #555; }
.project-architecture { margin-top: 1rem; }
.architecture-img { width: 100%; border-radius: 8px; border: 1px solid #e0e0e0; }

/* CERTIFICATIONS */
.certs-container { max-width: 900px; margin: 0 auto; padding: 2rem; }
.certs-container > h2 { color: var(--primary); margin-bottom: 2rem; font-size: 1.8rem; }
.certs-grid { display: flex; flex-direction: column; gap: 1.2rem; }
.cert-card {
  display: flex; align-items: center; gap: 1.5rem;
  background: var(--white); padding: 1.5rem 2rem; border-radius: 10px;
  border-left: 4px solid var(--accent);
  transition: transform 0.2s, box-shadow 0.2s;
}
.cert-card:hover { transform: translateY(-3px); box-shadow: 0 6px 20px rgba(0,0,0,0.1); }
.cert-badge-img {
  width: 80px; height: 80px; border-radius: 8px; flex-shrink: 0;
  object-fit: contain;
}
.cert-info { flex: 1; }
.cert-info h3 { color: var(--primary); font-size: 1.1rem; margin-bottom: 0.3rem; }
.cert-date { color: #666; font-size: 0.9rem; margin-bottom: 0.5rem; }
.cert-link {
  display: inline-block; color: var(--accent); text-decoration: none;
  font-weight: 600; font-size: 0.9rem; padding: 0.3rem 0.8rem;
  border: 1px solid var(--accent); border-radius: 20px;
  transition: all 0.3s;
}
.cert-link:hover { background: var(--accent); color: var(--primary); }

/* BLOG */
.blog-container { max-width: 900px; margin: 0 auto; padding: 2rem; }
.blog-container > h2 { color: var(--primary); margin-bottom: 2rem; font-size: 1.8rem; }
.blog-list { display: flex; flex-direction: column; gap: 1.2rem; }
.blog-card {
  background: var(--white); padding: 1.5rem 2rem; border-radius: 10px;
  border-left: 4px solid var(--accent); cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}
.blog-card:hover { transform: translateY(-3px); box-shadow: 0 6px 20px rgba(0,0,0,0.1); }
.blog-card h3 { color: var(--primary); margin-bottom: 0.3rem; }
.blog-date { color: #666; font-size: 0.85rem; margin-bottom: 0.5rem; }
.blog-summary { color: #555; line-height: 1.5; margin-bottom: 0.5rem; }
.blog-read-more { color: var(--accent); font-weight: 600; font-size: 0.9rem; }
.blog-back-btn {
  background: none; border: 1px solid var(--accent); color: var(--accent);
  padding: 0.4rem 1rem; border-radius: 20px; cursor: pointer;
  font-size: 0.9rem; font-weight: 600; margin-bottom: 1.5rem;
  transition: all 0.3s;
}
.blog-back-btn:hover { background: var(--accent); color: var(--primary); }
.blog-post h1 { color: var(--primary); font-size: 1.8rem; margin-bottom: 0.5rem; }
.blog-post h2 { color: var(--primary); font-size: 1.4rem; margin: 1.5rem 0 0.8rem; border-bottom: 2px solid var(--accent); padding-bottom: 0.3rem; }
.blog-post h3 { color: var(--primary); font-size: 1.1rem; margin: 1.2rem 0 0.5rem; }
.blog-post p { line-height: 1.7; margin-bottom: 1rem; color: #444; }
.blog-post ul, .blog-post ol { padding-left: 1.5rem; margin-bottom: 1rem; }
.blog-post li { line-height: 1.6; margin-bottom: 0.3rem; }
.blog-post code { background: #e8ecf1; padding: 0.15rem 0.4rem; border-radius: 4px; font-size: 0.9rem; }
.blog-post pre { background: var(--primary); color: #e0e0e0; padding: 1.2rem; border-radius: 8px; overflow-x: auto; margin-bottom: 1rem; }
.blog-post pre code { background: none; padding: 0; color: inherit; }
.blog-post a { color: var(--accent); text-decoration: none; }
.blog-post a:hover { text-decoration: underline; }
.blog-post img { max-width: 100%; border-radius: 8px; margin: 1rem 0; }
.blog-post blockquote { border-left: 4px solid var(--accent); padding: 0.5rem 1rem; margin: 1rem 0; background: var(--white); border-radius: 0 8px 8px 0; }

/* FOOTER */
footer { text-align: center; padding: 1.5rem; background: var(--primary); color: #888; font-size: 0.9rem; }

/* RESPONSIVE */
@media (max-width: 600px) {
  nav { flex-direction: column; gap: 0.8rem; }
  .hero h1 { font-size: 1.8rem; }
  .job-header { flex-direction: column; }
  .job-meta { text-align: left; }
}