/* ===== CSS Variables ===== */
:root {
  --bg: #0a0a0f;
  --bg-secondary: #111118;
  --bg-card: #16161e;
  --bg-card-hover: #1c1c26;
  --text: #e4e4e7;
  --text-secondary: #a1a1aa;
  --accent: #6366f1;
  --accent-light: #818cf8;
  --accent-glow: rgba(99, 102, 241, 0.15);
  --accent-green: #22c55e;
  --accent-orange: #f59e0b;
  --border: #27272a;
  --border-light: #3f3f46;
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --max-width: 1200px;
}

/* ===== Reset ===== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
}

a { color: var(--accent-light); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent); }

img { max-width: 100%; display: block; }

::selection {
  background: var(--accent);
  color: #fff;
}

/* ===== Navigation ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 1rem 0;
  transition: var(--transition);
  background: transparent;
}

.nav.scrolled {
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 0.6rem 0;
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent-light);
}

.nav-logo:hover { color: var(--accent); }

.nav-menu {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.nav-link:hover {
  color: var(--accent-light);
  background: var(--accent-glow);
}

.nav-link--cta {
  background: var(--accent);
  color: #fff !important;
  padding: 0.5rem 1.25rem;
}

.nav-link--cta:hover {
  background: var(--accent-light);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 5px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 6rem 2rem 2rem;
  overflow: hidden;
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(99, 102, 241, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99, 102, 241, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 40%, transparent 100%);
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 50%, var(--accent-glow) 0%, transparent 50%),
              radial-gradient(circle at 70% 50%, rgba(34, 197, 94, 0.05) 0%, transparent 50%);
  animation: heroGlow 8s ease-in-out infinite alternate;
}

@keyframes heroGlow {
  0% { transform: translate(0, 0); }
  100% { transform: translate(-5%, 5%); }
}

.hero-content {
  max-width: var(--max-width);
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-greeting {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--accent-light);
  margin-bottom: 0.5rem;
}

.hero-name {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.accent { color: var(--accent-light); }

.hero-title {
  font-size: clamp(1.2rem, 2.5vw, 1.8rem);
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.hero-description {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 520px;
  line-height: 1.8;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  margin-bottom: 3rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.8rem;
  font-family: var(--font);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: var(--transition);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  background: var(--accent-light);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 30px rgba(99, 102, 241, 0.4);
}

.btn-outline {
  background: transparent;
  color: var(--accent-light);
  border: 1.5px solid var(--accent);
}

.btn-outline:hover {
  background: var(--accent-glow);
  color: var(--accent-light);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 1rem 2.5rem;
  font-size: 1.1rem;
}

.hero-stats {
  display: flex;
  gap: 2.5rem;
}

.stat {
  text-align: center;
}

.stat-number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text);
  display: block;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* Hero Visual */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.hero-image-wrapper {
  position: relative;
  width: 300px;
  height: 300px;
}

.hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
  position: relative;
  z-index: 2;
  border: 3px solid var(--accent);
}

.hero-image-ring {
  position: absolute;
  inset: -12px;
  border-radius: 50%;
  border: 1px solid var(--accent);
  opacity: 0.3;
  animation: ringPulse 3s ease-in-out infinite;
}

.hero-image-ring--outer {
  inset: -28px;
  opacity: 0.15;
  animation-delay: 1.5s;
}

@keyframes ringPulse {
  0%, 100% { transform: scale(1); opacity: 0.3; }
  50% { transform: scale(1.05); opacity: 0.1; }
}

.floating-badge {
  position: absolute;
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 0.5rem 1rem;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  z-index: 3;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  animation: float 4s ease-in-out infinite;
}

.badge-1 { top: 10%; left: -5%; animation-delay: 0s; color: #00ADD8; }
.badge-2 { top: 5%; right: -5%; animation-delay: 1s; color: #3776AB; }
.badge-3 { bottom: 10%; left: -10%; animation-delay: 2s; color: #336791; }
.badge-4 { bottom: 5%; right: -5%; animation-delay: 3s; color: #4285F4; }

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
}

.scroll-mouse {
  width: 26px;
  height: 40px;
  border: 2px solid var(--text-secondary);
  border-radius: 13px;
  display: flex;
  justify-content: center;
  padding-top: 8px;
  opacity: 0.5;
  transition: var(--transition);
}

.scroll-indicator:hover .scroll-mouse { opacity: 1; border-color: var(--accent-light); }

.scroll-wheel {
  width: 3px;
  height: 8px;
  background: var(--accent-light);
  border-radius: 3px;
  animation: scrollDown 2s ease-in-out infinite;
}

@keyframes scrollDown {
  0% { transform: translateY(0); opacity: 1; }
  100% { transform: translateY(12px); opacity: 0; }
}

/* ===== Sections ===== */
.section {
  padding: 6rem 2rem;
}

.section--dark {
  background: var(--bg-secondary);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-title {
  font-size: clamp(1.8rem, 3vw, 2.2rem);
  font-weight: 800;
  margin-bottom: 3rem;
}

.section-number {
  font-family: var(--font-mono);
  color: var(--accent-light);
  font-size: 1rem;
  font-weight: 500;
  display: block;
  margin-bottom: 0.5rem;
}

/* ===== About ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 1.2rem;
  font-size: 1.05rem;
}

.about-text strong {
  color: var(--text);
}

.about-highlights {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem;
}

.highlight-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: var(--transition);
}

.highlight-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 8px 30px var(--accent-glow);
}

.highlight-icon {
  width: 44px;
  height: 44px;
  background: var(--accent-glow);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  font-size: 1.2rem;
  color: var(--accent-light);
}

.highlight-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.highlight-card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ===== Timeline ===== */
.timeline {
  position: relative;
  padding-left: 3rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), var(--border));
}

.timeline-item {
  position: relative;
  margin-bottom: 2.5rem;
}

.timeline-marker {
  position: absolute;
  left: -3rem;
  top: 6px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--bg-secondary);
  border: 2px solid var(--border-light);
  z-index: 1;
  transition: var(--transition);
}

.timeline-marker.active {
  border-color: var(--accent);
  background: var(--accent);
  box-shadow: 0 0 20px var(--accent-glow);
}

.timeline-content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.8rem;
  transition: var(--transition);
}

.timeline-content:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 20px var(--accent-glow);
}

.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1rem;
  gap: 1rem;
}

.timeline-role {
  font-size: 1.15rem;
  font-weight: 700;
}

.timeline-company {
  color: var(--accent-light);
  font-size: 0.95rem;
  font-weight: 500;
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
  white-space: nowrap;
  background: rgba(99, 102, 241, 0.1);
  padding: 0.25rem 0.75rem;
  border-radius: 50px;
}

.timeline-details {
  list-style: none;
}

.timeline-details li {
  position: relative;
  padding-left: 1.2rem;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.92rem;
}

.timeline-details li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--accent-light);
}

/* ===== Projects ===== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  opacity: 0;
  transition: var(--transition);
}

.project-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.project-card:hover::before { opacity: 1; }

.project-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.project-icon {
  font-size: 1.8rem;
  color: var(--accent-light);
}

.project-badge {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.75rem;
  border-radius: 50px;
  background: rgba(99, 102, 241, 0.15);
  color: var(--accent-light);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge--accent {
  background: rgba(34, 197, 94, 0.15);
  color: var(--accent-green);
}

.badge--green {
  background: rgba(245, 158, 11, 0.15);
  color: var(--accent-orange);
}

.project-name {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.project-subtitle {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.project-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.project-tech span {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.3rem 0.7rem;
  background: rgba(99, 102, 241, 0.08);
  border: 1px solid var(--border);
  border-radius: 50px;
  color: var(--text-secondary);
}

/* ===== Skills ===== */
.skills-container {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.skill-category {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.8rem;
}

.skill-category h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 1.2rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.skill-category h3 i {
  color: var(--accent-light);
}

.skill-item {
  margin-bottom: 1rem;
}

.skill-info {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.4rem;
  font-size: 0.9rem;
}

.skill-info span:last-child {
  color: var(--text-secondary);
  font-size: 0.8rem;
}

.skill-bar {
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  overflow: hidden;
}

.skill-progress {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  border-radius: 3px;
  width: 0;
  transition: width 1.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag {
  font-size: 0.85rem;
  padding: 0.4rem 1rem;
  background: rgba(99, 102, 241, 0.08);
  border: 1px solid var(--border);
  border-radius: 50px;
  color: var(--text-secondary);
  transition: var(--transition);
}

.tag:hover {
  border-color: var(--accent);
  color: var(--accent-light);
  background: var(--accent-glow);
}

/* ===== Certifications ===== */
.certs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.2rem;
}

.cert-card {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: var(--transition);
}

.cert-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.cert-icon {
  width: 50px;
  height: 50px;
  min-width: 50px;
  background: var(--accent-glow);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: var(--accent-light);
}

.cert-info h3 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 0.15rem;
}

.cert-info p {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.cert-year {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-light);
}

/* ===== Contact ===== */
.contact-content {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.contact-text {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.8;
}

.contact-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-top: 2rem;
}

.contact-links a {
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 1.2rem;
  transition: var(--transition);
}

.contact-links a:hover {
  color: var(--accent-light);
  border-color: var(--accent);
  background: var(--accent-glow);
  transform: translateY(-4px);
}

/* ===== Footer ===== */
.footer {
  padding: 2rem;
  text-align: center;
  border-top: 1px solid var(--border);
  background: var(--bg);
}

.footer p {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.footer strong { color: var(--text); }

.footer-sub {
  font-size: 0.75rem !important;
  margin-top: 0.3rem;
}

/* ===== Animations ===== */
.animate-in {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 0.8s ease forwards;
}

.delay-1 { animation-delay: 0.15s; }
.delay-2 { animation-delay: 0.3s; }
.delay-3 { animation-delay: 0.45s; }
.delay-4 { animation-delay: 0.6s; }

@keyframes fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Responsive ===== */
@media (max-width: 968px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-description { margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
  .hero-stats { justify-content: center; }

  .hero-visual { order: -1; }
  .hero-image-wrapper { width: 220px; height: 220px; }

  .badge-1 { left: 0; }
  .badge-3 { left: 0; }

  .about-grid { grid-template-columns: 1fr; gap: 2rem; }
  .projects-grid { grid-template-columns: 1fr; }
  .skills-container { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--bg-secondary);
    flex-direction: column;
    align-items: flex-start;
    padding: 5rem 2rem;
    transition: var(--transition);
    border-left: 1px solid var(--border);
    gap: 0.5rem;
  }

  .nav-menu.active { right: 0; }

  .nav-toggle { display: flex; z-index: 1001; }

  .nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  .nav-toggle.active span:nth-child(2) { opacity: 0; }
  .nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .section { padding: 4rem 1.5rem; }

  .timeline { padding-left: 2rem; }
  .timeline-marker { left: -2rem; }

  .timeline-header { flex-direction: column; }

  .hero-stats { gap: 1.5rem; }

  .about-highlights { grid-template-columns: 1fr; }

  .floating-badge { display: none; }
}