/* ===== CSS Variables ===== */
:root {
  --bg: #060608;
  --bg-secondary: #0d0d12;
  --bg-card: #111118;
  --bg-card-hover: #16161f;
  --border: rgba(255, 255, 255, 0.07);
  --border-hover: rgba(124, 58, 237, 0.4);
  --text: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #475569;
  --accent: #7c3aed;
  --accent-light: #a78bfa;
  --accent-2: #2563eb;
  --accent-glow: rgba(124, 58, 237, 0.15);
  --nav-height: 68px;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html { scroll-behavior: smooth; scroll-padding-top: var(--nav-height); }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { display: block; max-width: 100%; }

/* ===== Utilities ===== */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.gradient-text {
  background: linear-gradient(135deg, var(--accent-light), var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===== Navigation ===== */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 100;
  transition: background var(--transition), border-color var(--transition);
  border-bottom: 1px solid transparent;
}

#navbar.scrolled {
  background: rgba(6, 6, 8, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: var(--border);
}

.nav-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text);
  transition: color var(--transition);
}

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

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

.nav-links {
  display: flex;
  gap: 36px;
  align-items: center;
}

.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;
  width: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transition: width var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

/* ===== Hero ===== */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: var(--nav-height) 0 80px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black 0%, transparent 100%);
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
}

.glow-1 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(124,58,237,0.3), transparent);
  top: 5%;
  right: 5%;
}

.glow-2 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(37,99,235,0.2), transparent);
  bottom: 10%;
  left: 10%;
}

.hero-content {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 60px;
  align-items: center;
  width: 100%;
}

.hero-text { max-width: 580px; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(124, 58, 237, 0.1);
  border: 1px solid rgba(124, 58, 237, 0.25);
  color: var(--accent-light);
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: 100px;
  margin-bottom: 24px;
}

.badge-dot {
  width: 7px;
  height: 7px;
  background: #22c55e;
  border-radius: 50%;
  box-shadow: 0 0 8px #22c55e;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.hero-name {
  font-size: clamp(3.5rem, 8vw, 6rem);
  font-weight: 800;
  line-height: 1.0;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.hero-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 10px;
  letter-spacing: 0.02em;
}

.hero-subtitle {
  font-size: 0.9375rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  font-family: 'JetBrains Mono', monospace;
}

.hero-location {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 36px;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.stat { text-align: center; }

.stat-num {
  display: block;
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--accent-light), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
  margin-top: 2px;
}

.stat-divider {
  width: 1px;
  height: 36px;
  background: var(--border);
}

.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 10px;
  font-size: 0.9375rem;
  font-weight: 600;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  box-shadow: 0 4px 20px rgba(124, 58, 237, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(124, 58, 237, 0.5);
}

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

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

/* ===== Profile Photo ===== */
.hero-photo {
  position: relative;
  width: 280px;
  height: 280px;
  flex-shrink: 0;
}

.photo-ring {
  position: relative;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  padding: 3px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2), var(--accent-light));
  z-index: 1;
}

.profile-photo {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--bg);
}

.photo-blob {
  position: absolute;
  inset: -20px;
  background: radial-gradient(circle, rgba(124,58,237,0.2), transparent 70%);
  border-radius: 50%;
  z-index: 0;
  animation: blob 6s ease-in-out infinite;
}

@keyframes blob {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05) rotate(5deg); }
}

/* ===== Scroll Indicator ===== */
.scroll-indicator {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--text-muted), transparent);
  animation: scroll-line 2s ease-in-out infinite;
}

@keyframes scroll-line {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ===== Sections ===== */
section {
  padding: 100px 0;
}

section:nth-child(odd) {
  background: var(--bg-secondary);
}

.section-header {
  margin-bottom: 56px;
}

.section-tag {
  display: inline-block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8125rem;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 14px;
  letter-spacing: 0.05em;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--text);
}

/* ===== About ===== */
.about-content { max-width: 720px; }

.about-text {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 20px;
}

.about-text strong { color: var(--text); font-weight: 600; }

.about-highlights {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 36px;
}

.highlight-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  gap: 14px;
  align-items: flex-start;
  transition: border-color var(--transition), transform var(--transition);
}

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

.highlight-icon { font-size: 1.5rem; flex-shrink: 0; }

.highlight-card strong { display: block; font-weight: 600; margin-bottom: 4px; font-size: 0.9375rem; }
.highlight-card p { font-size: 0.8125rem; color: var(--text-secondary); line-height: 1.5; margin: 0; }

/* ===== Projects ===== */
.projects-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  opacity: 0;
  transition: opacity var(--transition);
}

.project-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

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

.project-card.featured {
  grid-column: 1 / -1;
}

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

.project-badge {
  display: inline-block;
  background: linear-gradient(135deg, rgba(124,58,237,0.2), rgba(37,99,235,0.2));
  border: 1px solid rgba(124,58,237,0.3);
  color: var(--accent-light);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 100px;
  margin-bottom: 14px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.project-title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
  line-height: 1.35;
}

.featured .project-title { font-size: 1.25rem; }

.project-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}

.project-highlights {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.project-highlights span {
  font-size: 0.8rem;
  color: var(--accent-light);
  background: rgba(124,58,237,0.08);
  padding: 3px 10px;
  border-radius: 100px;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.tag {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-family: 'JetBrains Mono', monospace;
}

.project-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: 'JetBrains Mono', monospace;
}

/* ===== Skills ===== */
.skills-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.skill-group {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color var(--transition);
}

.skill-group:hover { border-color: var(--border-hover); }

.skill-group-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.skill-icon { font-size: 1.2rem; }

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.skill-tag {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  cursor: default;
}

.skill-tag:hover {
  color: var(--text);
  border-color: rgba(167, 139, 250, 0.4);
  background: rgba(124, 58, 237, 0.08);
}

.skill-tag.primary {
  color: var(--accent-light);
  background: rgba(124, 58, 237, 0.08);
  border-color: rgba(124, 58, 237, 0.2);
}

.skill-tag.accent {
  color: #60a5fa;
  background: rgba(37, 99, 235, 0.08);
  border-color: rgba(37, 99, 235, 0.2);
}

/* ===== Timeline ===== */
.timeline {
  position: relative;
  padding-left: 32px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, var(--accent), transparent);
}

.timeline-item {
  position: relative;
  margin-bottom: 40px;
}

.timeline-item:last-child { margin-bottom: 0; }

.timeline-marker {
  position: absolute;
  left: -28px;
  top: 6px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg-secondary);
  box-shadow: 0 0 12px rgba(124, 58, 237, 0.6);
}

.timeline-content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 28px;
  transition: border-color var(--transition);
}

.timeline-content:hover { border-color: var(--border-hover); }

.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.timeline-role {
  font-size: 1.0625rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.timeline-company {
  font-size: 0.9375rem;
  color: var(--accent-light);
  font-weight: 500;
}

.timeline-right {
  text-align: right;
  flex-shrink: 0;
}

.timeline-date {
  display: block;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  font-family: 'JetBrains Mono', monospace;
  margin-bottom: 4px;
}

.timeline-location {
  display: block;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.timeline-bullets {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.timeline-bullets li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  padding-left: 16px;
  position: relative;
}

.timeline-bullets li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 0.8rem;
}

.timeline-note {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 10px;
}

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

.timeline-courses {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.timeline-courses strong { color: var(--text-secondary); }

/* ===== Contact ===== */
.contact-content { max-width: 600px; }

.contact-text {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 36px;
}

.contact-email {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 36px;
  transition: color var(--transition);
  letter-spacing: -0.02em;
}

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

.contact-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition);
}

.contact-link:hover {
  color: var(--text);
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

/* ===== Footer ===== */
footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 32px 0;
  text-align: center;
}

footer p {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.footer-sub {
  font-size: 0.8rem !important;
  margin-top: 6px;
  color: var(--text-muted) !important;
  opacity: 0.6;
}

/* ===== Animations ===== */
.animate-in {
  opacity: 0;
  transform: translateY(24px);
  animation: fadeUp 0.7s ease forwards;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }
.delay-5 { animation-delay: 0.5s; }
.delay-6 { animation-delay: 0.6s; }

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

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
  }
  .hero-text { max-width: 100%; }
  .hero-photo { margin: 0 auto; }
  .hero-badge { justify-content: center; }
  .hero-location { justify-content: center; }
  .hero-stats { justify-content: center; }
  .hero-cta { justify-content: center; }
  .scroll-indicator { display: none; }
  .projects-grid { grid-template-columns: 1fr; }
  .project-card.featured { grid-column: 1; }
  .skills-grid { grid-template-columns: 1fr; }
  .timeline-header { flex-direction: column; }
  .timeline-right { text-align: left; }
}

@media (max-width: 640px) {
  section { padding: 70px 0; }
  .nav-links { display: none; flex-direction: column; position: fixed; top: var(--nav-height); left: 0; right: 0; background: var(--bg); padding: 24px; gap: 20px; border-bottom: 1px solid var(--border); }
  .nav-links.open { display: flex; }
  .hamburger { display: flex; }
  .hero-name { font-size: 3rem; }
  .hero-photo { width: 200px; height: 200px; }
  .photo-ring { width: 190px; height: 190px; }
  .contact-email { font-size: 1.125rem; }
}