:root {
  /* Color Palette - Elegant Dark Theme */
  --color-primary: #00D4AA;
  --color-secondary: #6C5CE7;
  --color-accent: #FFB800;
  --color-bg-dark: #0A0E27;
  --color-bg-darker: #050816;
  --color-bg-card: #151B3B;
  --color-text-primary: #FFFFFF;
  --color-text-secondary: #A5B4CB;
  --color-text-muted: #6C7A96;
  --color-border: #1F2847;

  /* Typography */
  --font-display: 'Playfair Display', serif;
  --font-body: 'Work Sans', sans-serif;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;

  /* Animations */
  --transition-smooth: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: all 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

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

html { scroll-behavior: smooth; overflow-x: hidden; }

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

/* Navigation */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 1.5rem 0;
  background: rgba(10, 14, 39, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition-smooth);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 3rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-brand {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-menu { display: flex; list-style: none; gap: 3rem; }

.nav-menu a {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: 0.5px;
  position: relative;
  transition: var(--transition-smooth);
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: -5px; left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: var(--transition-smooth);
}

.nav-menu a:hover { color: var(--color-primary); }
.nav-menu a:hover::after { width: 100%; }

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 8rem 3rem 4rem;
  overflow: hidden;
}

.hero-background {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background:
    radial-gradient(circle at 20% 50%, rgba(108, 92, 231, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(0, 212, 170, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 40% 20%, rgba(255, 184, 0, 0.1) 0%, transparent 50%);
  animation: gradientShift 20s ease infinite;
}

@keyframes gradientShift {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.8; }
}

.hero-content {
  max-width: 1200px;
  text-align: center;
  position: relative;
  z-index: 1;
  animation: fadeInUp 1s ease-out;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(40px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-image-container { margin-bottom: 3rem; animation: fadeIn 1s ease-out 0.3s backwards; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.profile-image {
  width: 200px;
  height: 200px;
  margin: 0 auto;
  position: relative;
  border-radius: 50%;
  overflow: hidden;
  border: 4px solid var(--color-primary);
  box-shadow: 0 0 0 8px rgba(0, 212, 170, 0.1), 0 20px 60px rgba(0, 212, 170, 0.3);
  transition: var(--transition-smooth);
}

.profile-image:hover {
  transform: scale(1.05);
  box-shadow: 0 0 0 8px rgba(0, 212, 170, 0.2), 0 30px 80px rgba(0, 212, 170, 0.4);
}

.profile-image img { width: 100%; height: 100%; object-fit: cover; display: none; }
.profile-image img.loaded { display: block; }

.image-placeholder {
  width: 100%; height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-bg-card), var(--color-bg-dark));
  color: var(--color-text-muted);
}

.image-placeholder svg { width: 60px; height: 60px; margin-bottom: 0.5rem; }
.image-placeholder p { font-size: 0.85rem; font-weight: 500; }

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  animation: fadeInUp 1s ease-out 0.2s backwards;
}

.title-line { display: block; }
.title-line.highlight {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1.25rem, 3vw, 2rem);
  color: var(--color-text-secondary);
  font-weight: 500;
  margin-bottom: 1rem;
  animation: fadeInUp 1s ease-out 0.4s backwards;
}

.hero-description {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto 3rem;
  animation: fadeInUp 1s ease-out 0.6s backwards;
}

.hero-cta {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 1s ease-out 0.8s backwards;
}

.btn {
  padding: 1rem 2.5rem;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: 50px;
  transition: var(--transition-smooth);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border: 2px solid transparent;
  cursor: pointer;
  position: relative;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: var(--color-bg-dark);
  box-shadow: 0 10px 40px rgba(0, 212, 170, 0.3);
}

.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 15px 50px rgba(0, 212, 170, 0.4); }

.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-secondary:hover { background: var(--color-primary); color: var(--color-bg-dark); transform: translateY(-2px); }

.scroll-indicator {
  position: absolute;
  bottom: 3rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  color: var(--color-text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 2px;
  animation: fadeIn 1s ease-out 1s backwards;
}

.scroll-line {
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, var(--color-primary), transparent);
  animation: scrollAnimation 2s ease-in-out infinite;
}

@keyframes scrollAnimation {
  0%, 100% { transform: translateY(0); opacity: 0; }
  50% { transform: translateY(20px); opacity: 1; }
}

/* Container */
.container { max-width: 1400px; margin: 0 auto; padding: 0 3rem; }

/* Section Header */
.section-header {
  margin-bottom: 5rem;
  display: flex;
  align-items: center;
  gap: 2rem;
}

.section-number {
  font-family: var(--font-display);
  font-size: 5rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  opacity: 0.2;
  line-height: 1;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 900;
}

/* About Section */
.about { padding: 8rem 0; position: relative; }

.about-content {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 4rem;
  align-items: start;
}

.about-text .lead {
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--color-text-primary);
  margin-bottom: 2rem;
  line-height: 1.5;
}

.about-text p {
  color: var(--color-text-secondary);
  margin-bottom: 1.5rem;
  font-size: 1.125rem;
}

.about-highlights {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 3rem;
  padding-top: 3rem;
  border-top: 1px solid var(--color-border);
}

.highlight-item { text-align: center; }

.highlight-number {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
}

.highlight-label {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.about-info { display: flex; flex-direction: column; gap: 2rem; }

.info-card {
  background: var(--color-bg-card);
  padding: 2.5rem;
  border-radius: 20px;
  border: 1px solid var(--color-border);
  transition: var(--transition-smooth);
}

.info-card:hover {
  transform: translateY(-5px);
  border-color: var(--color-primary);
  box-shadow: 0 20px 60px rgba(0, 212, 170, 0.15);
}

.info-card h3 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  color: var(--color-primary);
}

.info-title { font-weight: 600; font-size: 1.125rem; margin-bottom: 0.5rem; }
.info-subtitle { color: var(--color-text-secondary); margin-bottom: 1rem; }
.info-location { color: var(--color-text-muted); font-size: 0.95rem; }

.cert-list { list-style: none; }
.cert-list li {
  color: var(--color-text-secondary);
  padding: 0.75rem 0;
  padding-left: 1.5rem;
  position: relative;
  font-size: 0.95rem;
}
.cert-list li::before { content: '→'; position: absolute; left: 0; color: var(--color-primary); font-weight: 700; }

/* Experience Section */
.experience { padding: 8rem 0; background: linear-gradient(180deg, transparent 0%, var(--color-bg-dark) 50%, transparent 100%); }

.timeline { position: relative; padding-left: 4rem; }
.timeline::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--color-primary), var(--color-secondary));
}

.timeline-item { position: relative; margin-bottom: 4rem; }
.timeline-marker {
  position: absolute;
  left: -4.5rem;
  top: 0.5rem;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-primary);
  box-shadow: 0 0 0 4px var(--color-bg-dark), 0 0 0 6px var(--color-primary);
}

.timeline-content {
  background: var(--color-bg-card);
  padding: 2.5rem;
  border-radius: 20px;
  border: 1px solid var(--color-border);
  transition: var(--transition-smooth);
}

.timeline-content:hover {
  transform: translateX(10px);
  border-color: var(--color-primary);
  box-shadow: 0 20px 60px rgba(0, 212, 170, 0.15);
}

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

.timeline-header h3 {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-primary);
}

.timeline-date {
  color: var(--color-text-muted);
  font-weight: 500;
  font-size: 0.95rem;
  background: rgba(0, 212, 170, 0.1);
  padding: 0.5rem 1rem;
  border-radius: 20px;
}

.timeline-company {
  color: var(--color-text-secondary);
  font-weight: 600;
  margin-bottom: 1.5rem;
  font-size: 1.125rem;
}

.timeline-achievements { list-style: none; }
.timeline-achievements li {
  color: var(--color-text-secondary);
  padding: 0.75rem 0;
  padding-left: 2rem;
  position: relative;
  line-height: 1.7;
}
.timeline-achievements li::before { content: '▹'; position: absolute; left: 0; color: var(--color-primary); font-size: 1.5rem; }

/* Projects Section */
.projects { padding: 8rem 0; }

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 2.5rem;
}

.project-card {
  background: var(--color-bg-card);
  padding: 2.5rem;
  border-radius: 20px;
  border: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
  transition: var(--transition-smooth);
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition-smooth);
}

.project-card:hover::before { transform: scaleX(1); }

.project-card:hover {
  transform: translateY(-10px);
  border-color: var(--color-primary);
  box-shadow: 0 30px 80px rgba(0, 212, 170, 0.2);
}

.project-number {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  opacity: 0.3;
  margin-bottom: 1rem;
  line-height: 1;
}

.project-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--color-text-primary);
}

.project-description { color: var(--color-text-secondary); line-height: 1.7; margin-bottom: 2rem; }

.project-tags { display: flex; flex-wrap: wrap; gap: 0.75rem; }

.tag {
  background: rgba(0, 212, 170, 0.1);
  color: var(--color-primary);
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.875rem;
  font-weight: 500;
  border: 1px solid rgba(0, 212, 170, 0.2);
}

/* Skills Section */
.skills { padding: 8rem 0; background: linear-gradient(180deg, transparent 0%, var(--color-bg-dark) 50%, transparent 100%); }

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2.5rem;
}

.skill-category {
  background: var(--color-bg-card);
  padding: 2.5rem;
  border-radius: 20px;
  border: 1px solid var(--color-border);
  transition: var(--transition-smooth);
}

.skill-category:hover {
  transform: translateY(-5px);
  border-color: var(--color-primary);
  box-shadow: 0 20px 60px rgba(0, 212, 170, 0.15);
}

.skill-category h3 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  color: var(--color-primary);
}

.skill-items { display: flex; flex-wrap: wrap; gap: 0.75rem; }

.skill-item {
  background: rgba(0, 212, 170, 0.1);
  color: var(--color-text-secondary);
  padding: 0.75rem 1.25rem;
  border-radius: 25px;
  font-size: 0.95rem;
  font-weight: 500;
  border: 1px solid rgba(0, 212, 170, 0.2);
  transition: var(--transition-smooth);
}
.skill-item:hover { background: var(--color-primary); color: var(--color-bg-dark); transform: translateY(-2px); }

/* Contact Section */
.contact { padding: 8rem 0; }

.contact-content { max-width: 800px; margin: 0 auto; }

.contact-lead {
  font-size: 1.5rem;
  color: var(--color-text-secondary);
  margin-bottom: 3rem;
  text-align: center;
  line-height: 1.6;
}

.contact-methods { display: flex; flex-direction: column; gap: 1.5rem; }

.contact-method {
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 2rem;
  background: var(--color-bg-card);
  border-radius: 20px;
  border: 1px solid var(--color-border);
  text-decoration: none;
  color: inherit;
  transition: var(--transition-smooth);
}

.contact-method:hover {
  transform: translateX(10px);
  border-color: var(--color-primary);
  box-shadow: 0 20px 60px rgba(0, 212, 170, 0.15);
}

.method-label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 600;
}

.method-value {
  font-size: 1.125rem;
  color: var(--color-text-primary);
  font-weight: 500;
}

/* Footer */
.footer {
  padding: 3rem 0;
  border-top: 1px solid var(--color-border);
  text-align: center;
  color: var(--color-text-muted);
}
.footer p { margin-bottom: 0.5rem; }
.footer-note { font-size: 0.875rem; opacity: 0.7; }

/* Responsive */
@media (max-width: 1024px) {
  .nav-container, .container { padding: 0 2rem; }
  .about-content { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-menu { gap: 1.5rem; font-size: 0.875rem; }
  .hero { padding: 6rem 1.5rem 3rem; }
  .section-header { flex-direction: column; align-items: flex-start; gap: 1rem; margin-bottom: 3rem; }
  .section-number { font-size: 3rem; }
  .about-highlights { grid-template-columns: 1fr; gap: 1.5rem; }
  .timeline { padding-left: 2rem; }
  .timeline-marker { left: -2.5rem; }
  .timeline-header { flex-direction: column; }
  .contact-method { flex-direction: column; text-align: center; gap: 1rem; }
}

@media (max-width: 480px) {
  .nav-container { padding: 0 1rem; }
  .nav-menu { flex-wrap: wrap; gap: 1rem; justify-content: center; }
  .hero-cta { flex-direction: column; align-items: stretch; }
  .btn { width: 100%; justify-content: center; }
}