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

:root {
  /* Color Palette */
  --primary-color: #6366f1;
  --secondary-color: #8b5cf6;
  --accent-color: #ec4899;
  --dark-bg: #0f172a;
  --darker-bg: #020617;
  --card-bg: #1e293b;
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --border-color: #334155;
  --success-color: #10b981;
  --warning-color: #f59e0b;

  /* Spacing */
  --section-padding: 80px 0;
  --container-max-width: 1200px;

  /* Transitions */
  --transition-speed: 0.3s;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.2);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.3);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background-color: var(--darker-bg);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* ========================================
   Navigation Bar
   ======================================== */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(10px);
  padding: 1rem 0;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-brand a {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--text-primary);
  text-decoration: none;
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--secondary-color)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-speed);
  position: relative;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(
    90deg,
    var(--primary-color),
    var(--secondary-color)
  );
  transition: width var(--transition-speed);
}

.nav-link:hover {
  color: var(--text-primary);
}

.nav-link:hover::after {
  width: 100%;
}

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

.hamburger span {
  width: 25px;
  height: 3px;
  background: var(--text-primary);
  border-radius: 3px;
  transition: all var(--transition-speed);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--darker-bg) 0%, var(--dark-bg) 100%);
  position: relative;
  overflow: hidden;
  padding-top: 80px;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(
      circle at 20% 50%,
      rgba(99, 102, 241, 0.1) 0%,
      transparent 50%
    ),
    radial-gradient(
      circle at 80% 80%,
      rgba(139, 92, 246, 0.1) 0%,
      transparent 50%
    );
  animation: pulse 8s ease-in-out infinite;
}

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

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

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

.hero-title {
  font-size: 3.5rem;
  margin-bottom: 1rem;
  font-weight: 800;
}

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

.hero-subtitle {
  font-size: 1.5rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.hero-description {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 2rem;
}

.btn {
  padding: 12px 30px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  transition: all var(--transition-speed);
  display: inline-block;
  cursor: pointer;
}

.btn-primary {
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--secondary-color)
  );
  color: white;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.6);
}

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

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

.social-links {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
}

.social-links a {
  color: var(--text-secondary);
  font-size: 1.5rem;
  transition: all var(--transition-speed);
}

.social-links a:hover {
  color: var(--primary-color);
  transform: translateY(-3px);
}

/* ========================================
   Section Styles
   ======================================== */
section {
  padding: var(--section-padding);
}

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

.section-title::after {
  content: "";
  display: block;
  width: 80px;
  height: 4px;
  background: linear-gradient(
    90deg,
    var(--primary-color),
    var(--secondary-color)
  );
  margin: 1rem auto 0;
  border-radius: 2px;
}

/* ========================================
   About Section
   ======================================== */
.about {
  background: var(--dark-bg);
}

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

.about-text p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
  font-size: 1.1rem;
  line-height: 1.8;
}

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

.quote {
  font-size: 1.3rem;
  font-style: italic;
  color: var(--accent-color);
  text-align: center;
  margin-top: 2rem;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 2rem;
}

.stat-card {
  background: var(--card-bg);
  padding: 2rem;
  border-radius: 12px;
  text-align: center;
  border: 1px solid var(--border-color);
  transition: all var(--transition-speed);
}

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

.stat-card i {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: 1rem;
}

.stat-card h3 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--secondary-color)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-card p {
  color: var(--text-muted);
}

/* ========================================
   Skills Section
   ======================================== */
.skills {
  background: var(--darker-bg);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.skill-category {
  background: var(--card-bg);
  padding: 2rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  transition: all var(--transition-speed);
}

.skill-category:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-color);
}

.skill-category h3 {
  font-size: 1.3rem;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

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

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.skill-tag {
  background: rgba(99, 102, 241, 0.1);
  color: var(--text-secondary);
  padding: 0.5rem 1rem;
  border-radius: 20px;
  border: 1px solid rgba(99, 102, 241, 0.3);
  font-size: 0.9rem;
  transition: all var(--transition-speed);
}

.skill-tag:hover {
  background: rgba(99, 102, 241, 0.2);
  border-color: var(--primary-color);
  color: var(--text-primary);
  transform: scale(1.05);
}

/* ========================================
   Projects Section
   ======================================== */
.projects {
  background: var(--dark-bg);
}

.projects-subtitle {
  font-size: 1.8rem;
  margin: 3rem 0 2rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.projects-subtitle i {
  color: var(--primary-color);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.project-card {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 2rem;
  border: 1px solid var(--border-color);
  transition: all var(--transition-speed);
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-color);
}

.project-card.featured {
  border-color: var(--accent-color);
  background: linear-gradient(
    135deg,
    rgba(236, 72, 153, 0.05),
    rgba(99, 102, 241, 0.05)
  );
}

.project-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.project-card h4 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.project-card p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.project-tags span {
  background: rgba(139, 92, 246, 0.1);
  color: var(--text-secondary);
  padding: 0.3rem 0.8rem;
  border-radius: 15px;
  font-size: 0.85rem;
  border: 1px solid rgba(139, 92, 246, 0.3);
}

.project-links {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.project-link {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: all var(--transition-speed);
}

.project-link:hover {
  color: var(--secondary-color);
  transform: translateX(5px);
}

/* ========================================
   Contact Section
   ======================================== */
.contact {
  background: var(--darker-bg);
}

.contact-content {
  text-align: center;
}

.contact-content > p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 3rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.contact-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
}

.contact-card {
  background: var(--card-bg);
  padding: 2rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  text-decoration: none;
  color: var(--text-primary);
  transition: all var(--transition-speed);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.contact-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-color);
}

.contact-card i {
  font-size: 3rem;
  color: var(--primary-color);
}

.contact-card h4 {
  font-size: 1.3rem;
  margin: 0;
}

.contact-card p {
  color: var(--text-muted);
  margin: 0;
}

/* ========================================
   Footer
   ======================================== */
.footer {
  background: var(--darker-bg);
  padding: 2rem 0;
  text-align: center;
  border-top: 1px solid var(--border-color);
}

.footer p {
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.footer-tagline {
  font-style: italic;
  color: var(--accent-color);
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    left: -100%;
    top: 70px;
    flex-direction: column;
    background: var(--dark-bg);
    width: 100%;
    text-align: center;
    transition: left 0.3s;
    box-shadow: var(--shadow-lg);
    padding: 2rem 0;
  }

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

  .hero-title {
    font-size: 2.5rem;
  }

  .hero-subtitle {
    font-size: 1.2rem;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .about-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .section-title {
    font-size: 2rem;
  }

  .projects-subtitle {
    font-size: 1.5rem;
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }

  .btn {
    padding: 10px 20px;
    font-size: 0.9rem;
  }

  .stat-card {
    padding: 1.5rem;
  }

  .skill-category {
    padding: 1.5rem;
  }

  .project-card {
    padding: 1.5rem;
  }
}

/* ========================================
   Animations
   ======================================== */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.fade-in {
  animation: fadeIn 1s ease-in;
}

/* Smooth scrolling offset for fixed navbar */
section {
  scroll-margin-top: 80px;
}