/* ===========================
   DESIGN TOKENS
=========================== */
:root {
  --bg-primary: #050b18;
  --bg-secondary: #0a1428;
  --bg-card: rgba(255,255,255,0.04);
  --bg-card-hover: rgba(255,255,255,0.08);
  --accent: #00c8ff;
  --accent-2: #7c5cfc;
  --accent-glow: rgba(0,200,255,0.25);
  --text-primary: #e8f0fe;
  --text-secondary: #8899bb;
  --text-muted: #556080;
  --border: rgba(255,255,255,0.08);
  --border-accent: rgba(0,200,255,0.3);
  --gradient-hero: linear-gradient(135deg, #050b18 0%, #0a1a35 60%, #0d1f3c 100%);
  --shadow-card: 0 8px 32px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 24px rgba(0,200,255,0.15);
  --radius: 16px;
  --radius-sm: 8px;
  --font: 'Inter', sans-serif;
  --font-mono: 'Fira Code', monospace;
  --nav-h: 68px;
  --transition: 0.3s ease;
}

/* ===========================
   RESET & BASE
=========================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* ===========================
   SCROLLBAR
=========================== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--accent-2); border-radius: 3px; }

/* ===========================
   NAVBAR
=========================== */
#navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--nav-h);
  background: rgba(5,11,24,0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
#navbar.scrolled {
  background: rgba(5,11,24,0.97);
  box-shadow: 0 4px 30px rgba(0,0,0,0.5);
}
.nav-inner {
  max-width: 1200px; margin: 0 auto;
  padding: 0 2rem;
  height: 100%;
  display: flex; align-items: center; justify-content: space-between;
}
.nav-logo-img {
  height: 40px;
  width: auto;
  display: block;
  object-fit: contain;
  transition: opacity var(--transition);
}
.nav-logo-img:hover { opacity: 0.8; }
.nav-links { display: flex; gap: 2rem; }
.nav-links a {
  font-size: 0.875rem; font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition);
  position: relative;
}
.nav-links a::after {
  content: ''; position: absolute; bottom: -4px; left: 0; right: 0;
  height: 2px; background: var(--accent);
  transform: scaleX(0); transition: transform var(--transition);
}
.nav-links a:hover { color: var(--text-primary); }
.nav-links a:hover::after { transform: scaleX(1); }
.hamburger {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 4px;
}
.hamburger span {
  display: block; width: 24px; height: 2px;
  background: var(--text-primary); border-radius: 2px;
  transition: var(--transition);
}

/* ===========================
   HERO
=========================== */
#hero {
  position: relative; min-height: 100vh;
  background: var(--gradient-hero);
  display: flex; align-items: center; justify-content: center;
  text-align: center; overflow: hidden;
  padding-top: var(--nav-h);
}
#particleCanvas {
  position: absolute; inset: 0; pointer-events: none;
}
.hero-content {
  position: relative; z-index: 2;
  display: flex; flex-direction: column; align-items: center; gap: 1rem;
  padding: 2rem;
}
.hero-avatar {
  position: relative; width: 160px; height: 160px; margin-bottom: 0.5rem;
}
.hero-avatar img {
  width: 160px; height: 160px;
  border-radius: 50%; object-fit: cover;
  border: 3px solid var(--border-accent);
  box-shadow: 0 0 40px rgba(0,200,255,0.3);
  animation: floatAvatar 6s ease-in-out infinite;
}
@keyframes floatAvatar {
  0% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
  100% { transform: translateY(0px); }
}
.avatar-ring {
  position: absolute; inset: -8px;
  border-radius: 50%;
  border: 2px solid transparent;
  background: linear-gradient(135deg, var(--accent), var(--accent-2)) border-box;
  -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: destination-out; mask-composite: exclude;
  animation: spin 8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.hero-badge {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: var(--font-mono); font-size: 0.75rem;
  color: var(--accent); background: rgba(0,200,255,0.1);
  border: 1px solid var(--border-accent);
  padding: 0.3rem 1rem; border-radius: 50px;
  letter-spacing: 0.05em;
}
.hero-name {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800; line-height: 1.1;
  letter-spacing: -1px;
}
.accent { color: var(--accent); }
.hero-title {
  font-size: clamp(1.2rem, 2.8vw, 1.5rem);
  color: #cdd6ec; min-height: 1.8em;
  font-weight: 500;
  letter-spacing: 0.01em;
}
.hero-title::after {
  content: '|'; animation: blink 0.8s step-end infinite; margin-left: 4px;
  color: var(--accent);
}
@keyframes blink { 50% { opacity: 0; } }
.hero-location { color: var(--text-muted); font-size: 0.9rem; }
.hero-cta { display: flex; gap: 1rem; flex-wrap: wrap; justify-content: center; margin-top: 0.5rem; }
.btn {
  padding: 0.75rem 2rem; border-radius: 50px;
  font-weight: 600; font-size: 0.9rem;
  cursor: pointer; transition: all var(--transition);
  display: inline-block;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff; border: none;
  box-shadow: 0 0 20px rgba(0,200,255,0.3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 30px rgba(0,200,255,0.5);
}
.btn-ghost {
  background: transparent; color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-ghost:hover {
  border-color: var(--accent); color: var(--accent);
  transform: translateY(-2px);
}
.scroll-indicator {
  position: absolute; bottom: 2rem; left: 50%; transform: translateX(-50%);
  z-index: 2;
}
.scroll-indicator span {
  display: block; width: 20px; height: 32px;
  border: 2px solid var(--border-accent); border-radius: 10px;
  position: relative;
}
.scroll-indicator span::before {
  content: ''; position: absolute;
  top: 4px; left: 50%; transform: translateX(-50%);
  width: 4px; height: 8px;
  background: var(--accent); border-radius: 2px;
  animation: scroll-anim 1.5s ease infinite;
}
@keyframes scroll-anim { 0%,100%{top:4px;opacity:1} 80%{top:14px;opacity:0} }

/* ===========================
   SECTIONS
=========================== */
.section { padding: 6rem 1.5rem; }
.section-dark { background: var(--bg-secondary); }
.container { max-width: 1100px; margin: 0 auto; }
.section-title {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 700; margin-bottom: 3rem;
  text-align: center; letter-spacing: -0.5px;
}

/* ===========================
   ABOUT
=========================== */
.about-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 4rem; align-items: center;
}
.about-text p {
  color: var(--text-secondary); margin-bottom: 1.2rem; font-size: 1.05rem;
}
.about-text strong { color: var(--text-primary); }
.about-text em { color: var(--accent); font-style: normal; }
.about-stats {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem;
}
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: center;
  transition: all var(--transition);
}
.stat-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}
.stat-value {
  display: flex; justify-content: center; align-items: baseline; gap: 4px;
}
.stat-num {
  display: inline-block; font-size: 2.5rem; font-weight: 800;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  line-height: 1;
}
.stat-plus { color: var(--accent); font-size: 1.5rem; font-weight: 700; -webkit-text-fill-color: var(--accent); }
.stat-label { display: block; margin-top: 0.5rem; color: var(--text-secondary); font-size: 0.8rem; }

/* ===========================
   SKILLS
=========================== */
.skill-groups {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem;
}
.skill-group {
  background: linear-gradient(180deg, var(--bg-card) 0%, rgba(255,255,255,0.01) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius); padding: 2rem;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.skill-group:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
}
.skill-group-header {
  display: flex; align-items: center; gap: 0.75rem;
  margin-bottom: 1.2rem;
}
.skill-icon { font-size: 1.5rem; }
.skill-group-header h3 { font-size: 1.1rem; font-weight: 700; letter-spacing: 0.01em; color: var(--text-primary); }
.skill-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.tag {
  font-size: 0.75rem; font-weight: 600; letter-spacing: 0.02em;
  padding: 0.4rem 0.9rem; border-radius: 8px;
  border: 1px solid; transition: all 0.2s ease;
  backdrop-filter: blur(4px);
}
.tag:hover { transform: translateY(-1px); }
.tag-ai    { color: #00c8ff; border-color: rgba(0,200,255,0.3); background: rgba(0,200,255,0.08); }
.tag-mobile{ color: #7c5cfc; border-color: rgba(124,92,252,0.3); background: rgba(124,92,252,0.08); }
.tag-backend{color: #00e5a0; border-color: rgba(0,229,160,0.3); background: rgba(0,229,160,0.08); }
.tag-lead  { color: #ffa94d; border-color: rgba(255,169,77,0.3); background: rgba(255,169,77,0.08); }
.tag-ai:hover    { background: rgba(0,200,255,0.18); }
.tag-mobile:hover{ background: rgba(124,92,252,0.18); }
.tag-backend:hover{background: rgba(0,229,160,0.18); }
.tag-lead:hover  { background: rgba(255,169,77,0.18); }

/* ===========================
   TIMELINE
=========================== */
.timeline { position: relative; padding-left: 2rem; }
.timeline::before {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--accent), var(--accent-2), transparent);
}
.timeline-item {
  position: relative; margin-bottom: 2.5rem;
  opacity: 0; transform: translateX(-20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.timeline-item.visible { opacity: 1; transform: translateX(0); }
.timeline-dot {
  position: absolute; left: -2.5rem; top: 1.2rem;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 12px rgba(0,200,255,0.5);
  border: 2px solid var(--bg-primary);
}
.timeline-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.8rem;
  transition: all var(--transition);
}
.timeline-card:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
  transform: translateX(4px);
}
.timeline-header {
  display: flex; justify-content: space-between;
  align-items: flex-start; gap: 1rem; margin-bottom: 1rem;
  flex-wrap: wrap;
}
.timeline-card h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: 0.25rem; }
.company { color: var(--accent); font-size: 0.875rem; font-weight: 500; }
.timeline-date {
  font-size: 0.78rem; color: var(--text-muted);
  white-space: nowrap; padding-top: 0.2rem;
  font-family: var(--font-mono);
}
.timeline-card ul { padding-left: 1.2rem; }
.timeline-card li {
  color: var(--text-secondary); font-size: 0.92rem;
  margin-bottom: 0.4rem; list-style: disc;
}
.timeline-card strong { color: var(--text-primary); }

/* ===========================
   PORTFOLIO
=========================== */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.portfolio-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.8rem;
  position: relative; transition: all var(--transition);
  display: flex; flex-direction: column; gap: 0.75rem;
}
.portfolio-card:first-child { grid-column: span 2; }
.portfolio-card:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow), var(--shadow-card);
  transform: translateY(-5px);
}
.portfolio-badge {
  position: absolute; top: 1rem; right: 1rem;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff; font-size: 0.7rem; font-weight: 700;
  padding: 0.2rem 0.7rem; border-radius: 50px;
  letter-spacing: 0.05em; text-transform: uppercase;
}
.portfolio-icon { font-size: 2rem; }
.portfolio-card h3 { font-size: 1rem; font-weight: 700; }
.portfolio-client { color: var(--accent); font-size: 0.8rem; font-weight: 500; }
.portfolio-card > p { color: var(--text-secondary); font-size: 0.9rem; flex: 1; }
.portfolio-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.portfolio-tags span {
  font-size: 0.72rem; font-weight: 500;
  color: var(--text-muted); background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  padding: 0.2rem 0.6rem; border-radius: 50px;
  transition: var(--transition);
}
.portfolio-card:hover .portfolio-tags span {
  color: var(--accent); border-color: var(--border-accent);
}

/* ===========================
   EDUCATION & CERTS
=========================== */
.edu-certs-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 3rem;
}
.sub-heading {
  font-size: 1.1rem; font-weight: 700;
  margin-bottom: 1.5rem; color: var(--text-primary);
}
.sub-heading.mt { margin-top: 2rem; }
.edu-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.4rem;
  margin-bottom: 1.2rem; transition: all var(--transition);
}
.edu-card:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
  transform: translateX(4px);
}
.edu-badge {
  display: inline-block; font-size: 0.75rem; font-weight: 600;
  color: #ffa94d; background: rgba(255,169,77,0.1);
  border: 1px solid rgba(255,169,77,0.3);
  padding: 0.2rem 0.7rem; border-radius: 50px; margin-bottom: 0.5rem;
}
.edu-badge.gold {
  color: #ffd700; background: rgba(255,215,0,0.1);
  border-color: rgba(255,215,0,0.3);
}
.edu-card h4 { font-size: 0.95rem; font-weight: 600; margin-bottom: 0.25rem; }
.edu-card p { color: var(--text-secondary); font-size: 0.85rem; }
.edu-year { color: var(--text-muted); font-size: 0.78rem; font-family: var(--font-mono); }
.cert-list { display: flex; flex-direction: column; gap: 1rem; }
.cert-item {
  display: flex; gap: 1rem; align-items: flex-start;
  padding: 1rem; background: var(--bg-card);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  transition: all var(--transition);
}
.cert-item:hover { border-color: var(--border-accent); transform: translateX(4px); }
.cert-dot {
  width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; margin-top: 0.35rem;
}
.cert-dot.pmp  { background: #00c8ff; box-shadow: 0 0 8px rgba(0,200,255,0.6); }
.cert-dot.ai   { background: #7c5cfc; box-shadow: 0 0 8px rgba(124,92,252,0.6); }
.cert-dot.pte  { background: #00e5a0; box-shadow: 0 0 8px rgba(0,229,160,0.6); }
.cert-dot.ar   { background: #ffa94d; box-shadow: 0 0 8px rgba(255,169,77,0.6); }
.cert-dot.fr   { background: #ff6b9d; box-shadow: 0 0 8px rgba(255,107,157,0.6); }
.cert-item h4 { font-size: 0.9rem; font-weight: 600; margin-bottom: 0.15rem; }
.cert-item p { color: var(--text-secondary); font-size: 0.8rem; }
.awards-list { display: flex; flex-direction: column; gap: 0.75rem; }
.award-item {
  padding: 0.9rem 1.1rem; background: var(--bg-card);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  color: var(--text-secondary); font-size: 0.875rem;
  transition: all var(--transition);
}
.award-item:hover { border-color: rgba(255,215,0,0.3); color: var(--text-primary); transform: translateX(4px); }

/* ===========================
   CONTACT
=========================== */
.contact-container { text-align: center; }
.contact-sub { color: var(--text-secondary); margin-bottom: 2.5rem; font-size: 1.05rem; }
.contact-cards {
  display: flex; flex-wrap: wrap; gap: 1.2rem; justify-content: center;
}
.contact-card {
  display: flex; align-items: center; gap: 0.8rem;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 50px; padding: 1rem 1.8rem;
  font-size: 0.9rem; color: var(--text-primary);
  transition: all var(--transition); cursor: pointer;
}
.contact-card:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
  transform: translateY(-3px);
  color: var(--accent);
}
.contact-icon { font-size: 1.2rem; }

/* ===========================
   FOOTER
=========================== */
footer {
  text-align: center; padding: 2rem 1rem;
  background: var(--bg-primary);
  color: var(--text-muted); font-size: 0.85rem;
  border-top: 1px solid var(--border);
}

/* ===========================
   RESPONSIVE
=========================== */
@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .skill-groups { grid-template-columns: 1fr; }
  .portfolio-grid { grid-template-columns: 1fr 1fr; }
  .portfolio-card:first-child { grid-column: span 2; }
  .edu-certs-grid { grid-template-columns: 1fr; }
}
@media (max-width: 700px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .nav-links.open {
    display: flex; flex-direction: column;
    position: fixed; inset: var(--nav-h) 0 0 0;
    background: rgba(5,11,24,0.98);
    align-items: center; justify-content: center; gap: 2.5rem;
    font-size: 1.2rem;
  }
  .portfolio-grid { grid-template-columns: 1fr; }
  .portfolio-card:first-child { grid-column: span 1; }
  .about-stats { grid-template-columns: 1fr 1fr; }
  .timeline { padding-left: 1.2rem; }
  .timeline-dot { left: -1.7rem; }
}
@media (max-width: 480px) {
  .section { padding: 4rem 1rem; }
  .hero-avatar { width: 120px; height: 120px; }
  .hero-avatar img { width: 120px; height: 120px; }
  .btn { padding: 0.65rem 1.5rem; font-size: 0.85rem; }
  .timeline-header { flex-direction: column; }
}