* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Outfit', sans-serif;
  background: #f8fafc;
  color: #1e293b;
  line-height: 1.6;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #f1f5f9; }
::-webkit-scrollbar-thumb { background: #6366f1; border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: #4f46e5; }

.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }
.section { padding: 80px 0; }
.section-header { margin-bottom: 40px; text-align: center; }
.section-tag {
  font-family: 'JetBrains Mono', monospace; font-size: 12px; color: #6366f1;
  letter-spacing: 2px; text-transform: uppercase; margin-bottom: 8px; display: inline-block;
  background: rgba(99,102,241,0.08); padding: 6px 12px; border-radius: 100px;
}
.section-title {
  font-family: 'Syne', sans-serif; font-size: 36px; font-weight: 800; color: #0f172a; margin-bottom: 10px;
}
.section-subtitle { color: #64748b; font-size: 15px; max-width: 500px; margin: 0 auto; }

/* NAVBAR - Enhanced */
nav {
  position: fixed; top: 0; left: 0; right: 0; height: 64px;
  background: rgba(255,255,255,0.92); z-index: 1000;
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.06);
  border-bottom: 1px solid rgba(0,0,0,0.04);
}
nav::after {
  content: '';
  position: absolute; bottom: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(99,102,241,0.3), transparent);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; padding: 0 24px; max-width: 1200px; margin: 0 auto; }
.nav-logo { font-family: 'Syne', sans-serif; font-weight: 800; font-size: 22px; color: #0f172a; letter-spacing: -0.5px; }
.nav-logo span { color: #6366f1; }
.nav-links { display: flex; gap: 28px; list-style: align-items: center; }
.nav-links a { font-size: 14px; color: #475569; font-weight: 500; transition: all 0.2s; position: relative; }
.nav-links a::after {
  content: ''; position: absolute; bottom: -4px; left: 0; width: 0; height: 2px;
  background: #6366f1; border-radius: 2px; transition: width 0.2s;
}
.nav-links a:hover { color: #0f172a; }
.nav-links a:hover::after { width: 100%; }
.nav-cta { 
  padding: 9px 18px; background: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%); 
  color: #fff !important; border-radius: 8px; font-size: 13px; font-weight: 600; 
  box-shadow: 0 2px 8px rgba(99,102,241,0.25); transition: all 0.2s;
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 4px 12px rgba(99,102,241,0.35); }
.nav-cta::after { display: none; }
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 10px; margin-right: -10px; }
.hamburger span { width: 24px; height: 2px; background: #334155; border-radius: 2px; transition: all 0.2s; }
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* MOBILE MENU */
.mobile-menu { display: none; position: fixed; top: 64px; left: 0; right: 0; background: #fff; box-shadow: 0 8px 30px rgba(0,0,0,0.08); z-index: 999; }
.mobile-menu.open { display: block; animation: slideDown 0.2s ease-out; }
@keyframes slideDown { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: translateY(0); } }
.mobile-menu ul { list-style: none; }
.mobile-menu a { display: block; padding: 16px 24px; font-size: 15px; color: #475569; border-bottom: 1px solid #f1f5f9; transition: all 0.15s; }
.mobile-menu a:hover { background: #f8fafc; color: #6366f1; padding-left: 28px; }
.mobile-menu .nav-cta { margin: 16px 24px; text-align: center; }

/* HERO - Enhanced */
#hero { 
  padding: 140px 0 90px; 
  background: linear-gradient(180deg, #fff 0%, #f8fafc 50%, #f1f5f9 100%); 
  text-align: center; 
  position: relative;
  overflow: hidden;
}
#hero::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(circle at 20% 30%, rgba(99,102,241,0.04) 0%, transparent 50%),
              radial-gradient(circle at 80% 70%, rgba(99,102,241,0.03) 0%, transparent 40%);
  pointer-events: none;
}
.hero-tag { 
  display: inline-flex; align-items: center; gap: 8px; 
  background: rgba(99,102,241,0.08); border: 1px solid rgba(99,102,241,0.15);
  border-radius: 100px; padding: 8px 16px; font-size: 13px; color: #6366f1; 
  margin-bottom: 20px; font-weight: 500;
}
.hero-tag .dot { width: 8px; height: 8px; background: #22c55e; border-radius: 50%; animation: pulse 2s infinite; }
@keyframes pulse { 0%,100% { opacity:1; } 50% { opacity:0.5; } }
.hero-title { 
  font-family: 'Syne', sans-serif; font-size: 56px; font-weight: 800; color: #0f172a; 
  margin-bottom: 16px; line-height: 1.1; letter-spacing: -1px;
}
.hero-title .gradient { 
  background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #6366f1 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-subtitle { 
  font-size: 18px; color: #475569; margin-bottom: 20px; 
  font-family: 'JetBrains Mono', monospace; font-weight: 500;
}
.cursor { display: inline-block; width: 2px; height: 1.1em; background: #6366f1; vertical-align: middle; animation: blink 1s step-end infinite; }
@keyframes blink { 0%,100% { opacity:1; } 50% { opacity:0; } }
.hero-desc { color: #64748b; font-size: 17px; max-width: 620px; margin: 0 auto 28px; line-height: 1.7; }
.hero-actions { display: flex; gap: 14px; justify-content: center; margin-bottom: 28px; }
.btn-primary { 
  display: inline-flex; align-items: center; gap: 8px; padding: 14px 28px; 
  background: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%); color: #fff; 
  border-radius: 10px; font-weight: 600; font-size: 15px; box-shadow: 0 4px 14px rgba(99,102,241,0.3);
  transition: all 0.2s;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(99,102,241,0.4); }
.btn-secondary { 
  display: inline-flex; align-items: center; gap: 8px; padding: 14px 28px; 
  border: 2px solid #e2e8f0; color: #334155; border-radius: 10px; font-weight: 600; font-size: 15px;
  background: #fff; transition: all 0.2s;
}
.btn-secondary:hover { border-color: #6366f1; color: #6366f1; box-shadow: 0 4px 14px rgba(99,102,241,0.1); }
.hero-socials { display: flex; gap: 12px; justify-content: center; }
.social-link { 
  width: 44px; height: 44px; display: flex; align-items: center; justify-content: center; 
  border: 1px solid #e2e8f0; border-radius: 12px; color: #64748b; background: #fff;
  transition: all 0.2s; font-size: 18px;
}
.social-link:hover { border-color: #6366f1; color: #6366f1; transform: translateY(-2px); box-shadow: 0 4px 12px rgba(99,102,241,0.15); }

/* ABOUT */
#about { background: #fff; position: relative; }
#about::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, #e2e8f0, transparent);
}
.about-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: start; }
.about-text p { color: #475569; font-size: 15px; margin-bottom: 14px; line-height: 1.7; }
.about-text strong { color: #1e293b; }
.about-info-list { margin-top: 24px; }
.about-info-item { display: flex; align-items: center; gap: 12px; font-size: 14px; margin-bottom: 10px; }
.about-info-item .ico { width: 36px; height: 36px; display: flex; align-items: center; justify-content: center; background: rgba(99,102,241,0.1); border-radius: 10px; color: #6366f1; font-size: 14px; }
.timeline-title { font-size: 16px; font-weight: 700; margin-bottom: 16px; color: #0f172a; }
.timeline { padding-left: 20px; border-left: 2px solid #e2e8f0; margin-left: 4px; }
.timeline-item { margin-bottom: 20px; position: relative; }
.timeline-item::before { content: ''; position: absolute; left: -21px; top: 6px; width: 10px; height: 10px; background: #fff; border: 2px solid #6366f1; border-radius: 50%; }
.timeline-item:last-child::before { background: #6366f1; }
.timeline-period { font-size: 11px; color: #6366f1; font-family: 'JetBrains Mono', monospace; font-weight: 600; }
.timeline-heading { font-size: 15px; font-weight: 600; margin: 4px 0; color: #1e293b; }
.timeline-sub { font-size: 13px; color: #64748b; }

/* SKILLS - Enhanced */
.skills-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.skill-category { 
  background: #fff; border: 1px solid #e2e8f0; border-radius: 14px; padding: 22px;
  transition: all 0.25s; box-shadow: 0 1px 3px rgba(0,0,0,0.02);
}
.skill-category:hover { 
  border-color: rgba(99,102,241,0.3); box-shadow: 0 4px 20px rgba(0,0,0,0.04); transform: translateY(-2px);
}
.skill-cat-header { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.skill-cat-icon { width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, rgba(99,102,241,0.1) 0%, rgba(99,102,241,0.05) 100%); border-radius: 12px; }
.skill-cat-title { font-size: 15px; font-weight: 700; color: #0f172a; }
.skill-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.skill-tag { 
  padding: 6px 12px; background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 100px; 
  font-size: 12px; color: #475569; transition: all 0.15s;
}
.skill-tag:hover { background: #f1f5f9; border-color: #cbd5e1; }
.skill-tag.hot { background: rgba(99,102,241,0.08); color: #6366f1; border-color: rgba(99,102,241,0.2); }

/* PROJECTS - Enhanced */
#projects { background: #f8fafc; position: relative; }
#projects::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, #e2e8f0, transparent);
}
.projects-filter { display: flex; gap: 10px; justify-content: center; margin-bottom: 28px; flex-wrap: wrap; }
.filter-btn { 
  padding: 8px 18px; border: 1px solid #e2e8f0; background: #fff; border-radius: 100px; 
  font-size: 13px; color: #64748b; cursor: pointer; transition: all 0.2s; font-weight: 500;
}
.filter-btn.active, .filter-btn:hover { border-color: #6366f1; color: #6366f1; background: rgba(99,102,241,0.04); }
.projects-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.project-card { 
  background: #fff; border: 1px solid #e2e8f0; border-radius: 14px; padding: 20px;
  transition: all 0.25s; box-shadow: 0 1px 3px rgba(0,0,0,0.02);
}
.project-card:hover { 
  border-color: rgba(99,102,241,0.3); box-shadow: 0 8px 30px rgba(0,0,0,0.06); transform: translateY(-4px);
}
.project-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 14px; }
.project-icon { width: 44px; height: 44px; border-radius: 12px; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, rgba(99,102,241,0.1) 0%, rgba(139,92,246,0.05) 100%); }
.project-links { display: flex; gap: 8px; }
.project-link-btn { 
  width: 32px; height: 32px; display: flex; align-items: center; justify-content: center; 
  border: 1px solid #e2e8f0; border-radius: 8px; color: #94a3b8; font-size: 14px; transition: all 0.15s;
}
.project-link-btn:hover { border-color: #6366f1; color: #6366f1; background: rgba(99,102,241,0.05); }
.project-name { font-size: 16px; font-weight: 700; margin-bottom: 8px; color: #0f172a; }
.project-desc { font-size: 13px; color: #64748b; margin-bottom: 12px; line-height: 1.6; }
.project-badges { display: flex; gap: 6px; flex-wrap: wrap; }
.project-badge { padding: 4px 10px; background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 100px; font-size: 11px; color: #64748b; }
.project-award { font-size: 12px; color: #f59e0b; margin-top: 12px; font-weight: 600; display: flex; align-items: center; gap: 4px; }

/* CERTS - Enhanced */
#certifications { background: #fff; position: relative; }
#certifications::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, #e2e8f0, transparent);
}
.certs-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.cert-card { 
  display: flex; align-items: center; gap: 12px; padding: 14px; 
  background: #fff; border: 1px solid #e2e8f0; border-radius: 12px; transition: all 0.2s;
}
.cert-card:hover { 
  border-color: rgba(99,102,241,0.3); box-shadow: 0 4px 16px rgba(0,0,0,0.04); transform: translateY(-2px);
}
.cert-icon { 
  width: 36px; height: 36px; display: flex; align-items: center; justify-content: center; 
  background: linear-gradient(135deg, rgba(99,102,241,0.1) 0%, rgba(139,92,246,0.05) 100%); 
  border-radius: 10px; font-size: 16px; flex-shrink: 0;
}
.cert-info { flex: 1; min-width: 0; }
.cert-name { font-size: 12px; font-weight: 600; color: #1e293b; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.cert-issuer { font-size: 10px; color: #94a3b8; margin-top: 2px; }
.cert-check { 
  width: 20px; height: 20px; display: flex; align-items: center; justify-content: center; 
  background: rgba(34,197,94,0.1); border-radius: 50%; color: #22c55e; font-size: 10px; flex-shrink: 0;
}

/* CONTACT - Enhanced */
#contact { background: #fff; position: relative; }
#contact::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, #e2e8f0, transparent);
}
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 48px; align-items: start; }
.contact-left p { color: #64748b; font-size: 15px; margin-bottom: 20px; line-height: 1.7; }
.contact-links { display: flex; flex-direction: column; gap: 12px; }
.contact-item { 
  display: flex; align-items: center; gap: 14px; padding: 16px; 
  background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 12px; 
  transition: all 0.2s;
}
.contact-item:hover { 
  border-color: rgba(99,102,241,0.25); background: #fff; 
  box-shadow: 0 4px 16px rgba(0,0,0,0.04); transform: translateX(4px);
}
.contact-item .cico { 
  width: 44px; height: 44px; display: flex; align-items: center; justify-content: center; 
  background: linear-gradient(135deg, rgba(99,102,241,0.1) 0%, rgba(99,102,241,0.05) 100%); 
  border-radius: 12px; color: #6366f1; font-size: 18px; flex-shrink: 0;
}
.contact-item-label { font-size: 11px; color: #94a3b8; text-transform: uppercase; margin-bottom: 2px; letter-spacing: 0.5px; }
.contact-item-val { font-size: 15px; color: #1e293b; font-weight: 600; }
.contact-form { 
  background: #fff; padding: 28px; border-radius: 16px; border: 1px solid #e2e8f0;
  box-shadow: 0 4px 20px rgba(0,0,0,0.03);
}
.contact-form .form-group { margin-bottom: 16px; }
.contact-form label { display: block; font-size: 13px; color: #475569; font-weight: 600; margin-bottom: 8px; }
.contact-form input, .contact-form textarea { 
  width: 100%; padding: 14px 16px; border: 1px solid #e2e8f0; border-radius: 10px; 
  font-size: 15px; background: #f8fafc; font-family: 'Outfit', sans-serif;
  transition: all 0.2s;
}
.contact-form input:focus, .contact-form textarea:focus { 
  border-color: #6366f1; outline: none; background: #fff;
  box-shadow: 0 0 0 3px rgba(99,102,241,0.1);
}
.contact-form textarea { min-height: 120px; resize: vertical; }
.contact-form .btn-primary { 
  width: 100%; justify-content: center; padding: 16px; font-size: 15px; 
  border-radius: 12px;
}
.contact-form .form-status { text-align: center; padding: 12px; color: #22c55e; font-size: 14px; display: none; font-weight: 500; }

/* FOOTER */
footer { background: #f8fafc; padding: 24px 0; border-top: 1px solid #e2e8f0; text-align: center; }
.footer-socials { display: flex; gap: 12px; justify-content: center; margin-bottom: 16px; }
.footer-socials a { 
  width: 36px; height: 36px; display: flex; align-items: center; justify-content: center; 
  background: #fff; border: 1px solid #e2e8f0; border-radius: 10px; color: #64748b; font-size: 16px;
  transition: all 0.2s;
}
.footer-socials a:hover { border-color: #6366f1; color: #6366f1; transform: translateY(-2px); }
.footer-inner { margin-top: 8px; }
.footer-copy { font-size: 13px; color: #94a3b8; margin-bottom: 4px; }
.footer-copy span { color: #6366f1; font-weight: 500; }

/* RESPONSIVE */
@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; gap: 32px; }
  .skills-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .certs-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; gap: 32px; }
  .hero-title { font-size: 44px; }
}

@media (max-width: 600px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
  nav { height: 60px; }
  .nav-inner { height: 60px; padding: 0 16px; }
  .mobile-menu { top: 60px; }
  #hero { padding: 110px 0 60px; }
  .hero-title { font-size: 34px; letter-spacing: -0.5px; }
  .hero-subtitle { font-size: 15px; }
  .hero-desc { font-size: 14px; padding: 0 10px; }
  .hero-actions { flex-direction: column; align-items: center; }
  .btn-primary, .btn-secondary { width: 100%; max-width: 260px; justify-content: center; }
  .projects-grid { grid-template-columns: 1fr; }
  .certs-grid { grid-template-columns: 1fr; }
  .section { padding: 60px 0; }
  .section-title { font-size: 28px; }
  .contact-form { padding: 20px; }
}