/* ===== Reset & Base Styles ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Color Palette */
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-card: #1e293b;
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --accent-primary: #3b82f6;
  --accent-secondary: #8b5cf6;
  --accent-gradient: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
  --border-color: #334155;
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.3);
  --shadow-card: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-card-hover: 0 8px 20px rgba(59, 130, 246, 0.2);
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

body {
  font-family: var(--font-primary);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ===== Container ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ===== Hero Section ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, transparent 70%);
  top: -100px;
  right: -100px;
  border-radius: 50%;
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-20px); }
}

.hero-content {
  text-align: center;
  z-index: 1;
}

.profile-image {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  border: 4px solid var(--accent-primary);
  box-shadow: 0 0 30px rgba(59, 130, 246, 0.4);
  margin-bottom: 2rem;
  object-fit: cover;
  animation: fadeInUp 0.8s ease-out;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero .subtitle {
  font-size: 1.5rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  animation: fadeInUp 0.8s ease-out 0.4s both;
}

.hero .description {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 700px;
  margin: 0 auto 2rem;
  animation: fadeInUp 0.8s ease-out 0.6s both;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== Social Links ===== */
.social-links {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-top: 2rem;
  animation: fadeInUp 0.8s ease-out 0.8s both;
}

.social-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  background: var(--bg-card);
  color: var(--text-primary);
  text-decoration: none;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
  font-weight: 500;
}

.social-link:hover {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card-hover);
}

/* ===== Section Styles ===== */
.section {
  padding: 5rem 0;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 3rem;
  text-align: center;
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 80px;
  height: 4px;
  background: var(--accent-gradient);
  margin: 1rem auto 0;
  border-radius: 2px;
}

/* ===== Card Styles ===== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2rem;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-card);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--accent-primary);
}

.card-header {
  margin-bottom: 1.5rem;
}

.card-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.card-subtitle {
  font-size: 1.1rem;
  color: var(--accent-primary);
  margin-bottom: 0.5rem;
}

.card-meta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
}

.card-meta-item {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.card-content {
  color: var(--text-secondary);
  line-height: 1.7;
}

.card-content ul {
  list-style: none;
  margin-top: 1rem;
}

.card-content li {
  padding-left: 1.5rem;
  position: relative;
  margin-bottom: 0.5rem;
}

.card-content li::before {
  content: '▹';
  position: absolute;
  left: 0;
  color: var(--accent-primary);
  font-weight: bold;
}

/* ===== Skills Section ===== */
.skills-category {
  margin-bottom: 3rem;
}

.skills-category-title {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.skills-category-title::before {
  content: '';
  width: 4px;
  height: 1.5rem;
  background: var(--accent-gradient);
  border-radius: 2px;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1rem;
}

.skill-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1rem;
  transition: all 0.3s ease;
}

.skill-item:hover {
  border-color: var(--accent-primary);
  transform: translateX(5px);
}

.skill-name {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.skill-level {
  font-size: 0.85rem;
  color: var(--text-muted);
}

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

.skill-bar-fill {
  height: 100%;
  background: var(--accent-gradient);
  border-radius: 3px;
  transition: width 1s ease-out;
}

/* ===== Tags ===== */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.tag {
  display: inline-block;
  padding: 0.35rem 0.75rem;
  background: rgba(59, 130, 246, 0.1);
  color: var(--accent-primary);
  border: 1px solid rgba(59, 130, 246, 0.3);
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 500;
  transition: all 0.3s ease;
}

.tag:hover {
  background: rgba(59, 130, 246, 0.2);
  border-color: var(--accent-primary);
}

/* ===== Timeline (for Education/Career) ===== */
.timeline {
  position: relative;
  padding-left: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border-color);
}

.timeline-item {
  position: relative;
  margin-bottom: 3rem;
  padding-left: 2rem;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -2rem;
  top: 0.5rem;
  width: 12px;
  height: 12px;
  background: var(--accent-primary);
  border-radius: 50%;
  border: 3px solid var(--bg-primary);
  box-shadow: 0 0 0 4px var(--bg-card);
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.5rem;
  }
  
  .hero .subtitle {
    font-size: 1.2rem;
  }
  
  .cards-grid {
    grid-template-columns: 1fr;
  }
  
  .skills-grid {
    grid-template-columns: 1fr;
  }
  
  .social-links {
    flex-direction: column;
    align-items: center;
  }
  
  .container {
    padding: 0 1rem;
  }
  
  .section {
    padding: 3rem 0;
  }
}

/* ===== Scroll Animation ===== */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Footer ===== */
footer {
  background: var(--bg-secondary);
  padding: 3rem 0;
  text-align: center;
  border-top: 1px solid var(--border-color);
  margin-top: 5rem;
}

footer p {
  color: var(--text-muted);
  font-size: 0.9rem;
}