:root {
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --secondary: #64748b;
  --dark: #0f172a;
  --light: #f8fafc;
  --accent: #f59e0b;
  --success: #10b981;
}

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

body {
  font-family: "Inter", sans-serif;
  color: var(--dark);
  overflow-x: hidden;
  background: #ffffff;
}

html {
  scroll-behavior: smooth;
}

/* Navbar */
.navbar {
  padding: 1rem 0;
  background: rgba(15, 23, 42, 0.95) !important;
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
}

.navbar-brand {
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, #ffffff 0%, #94a3b8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.navbar-brand i {
  color: var(--accent);
}

.nav-link {
  font-weight: 500;
  margin: 0 0.5rem;
  position: relative;
  transition: color 0.3s ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: -5px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: all 0.3s ease;
  transform: translateX(-50%);
}

.nav-link:hover::after {
  width: 80%;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #334155 100%);
  color: white;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 2rem 0;
}

.hero::before {
  content: "";
  position: absolute;
  width: 500px;
  height: 500px;
  background: radial-gradient(
    circle,
    rgba(37, 99, 235, 0.15) 0%,
    transparent 70%
  );
  border-radius: 50%;
  top: -100px;
  right: -100px;
  animation: float 6s ease-in-out infinite;
}

.hero::after {
  content: "";
  position: absolute;
  width: 400px;
  height: 400px;
  background: radial-gradient(
    circle,
    rgba(245, 158, 11, 0.1) 0%,
    transparent 70%
  );
  border-radius: 50%;
  bottom: -100px;
  left: -100px;
  animation: float 8s ease-in-out infinite;
}

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

.hero .container {
  position: relative;
  z-index: 1;
}

.hero-avatar {
  animation: fadeInUp 0.8s ease;
}

.avatar-circle {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  font-weight: 700;
  color: white;
  margin: 0 auto;
  box-shadow: 0 20px 40px rgba(37, 99, 235, 0.3);
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  line-height: 1.2;
  animation: fadeInUp 0.8s ease 0.2s both;
}

.hero h1 span {
  background: linear-gradient(135deg, #f59e0b 0%, #fbbf24 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero .lead {
  font-size: 1.4rem;
  color: #e2e8f0;
  margin-bottom: 0.5rem;
  animation: fadeInUp 0.8s ease 0.3s both;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: #cbd5e1;
  margin-bottom: 2rem;
  animation: fadeInUp 0.8s ease 0.4s both;
}

.hero-buttons {
  animation: fadeInUp 0.8s ease 0.5s both;
}

.hero .btn-primary {
  padding: 0.875rem 2.5rem;
  font-weight: 600;
  border-radius: 50px;
  background: var(--accent);
  border: none;
  box-shadow: 0 10px 25px rgba(245, 158, 11, 0.3);
  transition: all 0.3s ease;
}

.hero .btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 35px rgba(245, 158, 11, 0.4);
  background: #d97706;
}

.hero .btn-outline-light {
  padding: 0.875rem 2.5rem;
  font-weight: 600;
  border-radius: 50px;
  border: 2px solid white;
  transition: all 0.3s ease;
}

.hero .btn-outline-light:hover {
  background: white;
  color: var(--dark);
  transform: translateY(-3px);
}

.hero-social {
  animation: fadeInUp 0.8s ease 0.6s both;
}

.social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 45px;
  height: 45px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  color: white;
  margin: 0 0.5rem;
  transition: all 0.3s ease;
  font-size: 1.2rem;
}

.social-link:hover {
  background: var(--accent);
  color: white;
  transform: translateY(-5px);
}

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

/* Section Styling */
.section {
  padding: 5rem 0;
  position: relative;
}

.section h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  position: relative;
  display: inline-block;
}

.section h2::after {
  content: "";
  position: absolute;
  bottom: -10px;
  left: 0;
  width: 60px;
  height: 4px;
  background: var(--accent);
  border-radius: 2px;
}

.text-center h2::after {
  left: 50%;
  transform: translateX(-50%);
}

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

.about-stats {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}

.stat-item {
  flex: 1;
  min-width: 150px;
}

.stat-item h3 {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.stat-item p {
  color: var(--secondary);
  font-size: 0.95rem;
}

.about-card {
  background: var(--light);
  padding: 2rem;
  border-radius: 16px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.about-card h4 {
  font-size: 1.2rem;
  margin-bottom: 0.75rem;
  color: var(--dark);
}

.about-card h4 i {
  color: var(--accent);
  margin-right: 0.5rem;
}

.about-card p {
  color: var(--secondary);
  margin-bottom: 0.5rem;
}

.about-card hr {
  margin: 1.5rem 0;
  opacity: 0.2;
}

/* Experience Timeline */
.timeline {
  position: relative;
  padding-left: 40px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--primary), var(--accent));
}

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

.timeline-dot {
  position: absolute;
  left: -46px;
  top: 0;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
  border: 4px solid var(--light);
  box-shadow: 0 0 0 4px rgba(245, 158, 11, 0.2);
}

.timeline-content {
  background: white;
  padding: 1.5rem;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  transition: all 0.3s ease;
}

.timeline-content:hover {
  transform: translateX(10px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.timeline-date {
  display: inline-block;
  background: var(--primary);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.timeline-content h4 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 0.25rem;
}

.timeline-content .company {
  color: var(--secondary);
  font-weight: 600;
  margin-bottom: 1rem;
}

.timeline-content ul {
  margin: 0;
  padding-left: 1.25rem;
}

.timeline-content li {
  color: var(--secondary);
  margin-bottom: 0.5rem;
  line-height: 1.6;
}

/* Skills Section */
.skill-card {
  background: white;
  padding: 1.5rem;
  border-radius: 16px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  transition: all 0.3s ease;
  text-align: center;
  height: 100%;
}

.skill-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 40px rgba(37, 99, 235, 0.15);
}

.skill-icon {
  font-size: 3rem;
  color: var(--primary);
  margin-bottom: 1rem;
}

.skill-card h5 {
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 1rem;
}

.skill-bar {
  height: 8px;
  background: #e2e8f0;
  border-radius: 10px;
  overflow: hidden;
}

.skill-progress {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 10px;
  transition: width 1s ease;
}

/* Projects Section */
.project-card {
  background: white;
  border-radius: 16px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  transition: all 0.3s ease;
  overflow: hidden;
  height: 100%;
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

.project-image {
  height: 200px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  position: relative;
  overflow: hidden;
}

.project-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
}

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

.project-overlay i {
  font-size: 3rem;
  color: white;
}

.project-body {
  padding: 1.5rem;
}

.project-body h4 {
  font-weight: 700;
  font-size: 1.3rem;
  color: var(--dark);
  margin-bottom: 0.75rem;
}

.project-body > p {
  color: var(--secondary);
  margin-bottom: 1rem;
  line-height: 1.6;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.tech-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: var(--light);
  color: var(--primary);
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
}

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

.btn-outline-primary {
  border: 2px solid var(--primary);
  color: var(--primary);
  padding: 0.5rem 1.25rem;
  border-radius: 50px;
  font-weight: 600;
  transition: all 0.3s ease;
}

.btn-outline-primary:hover {
  background: var(--primary);
  color: white;
  transform: translateX(3px);
}

/* GitHub Stats */
.stat-box {
  background: white;
  padding: 2rem 1.5rem;
  border-radius: 16px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  transition: all 0.3s ease;
}

.stat-box:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

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

.stat-box h3 {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 0.5rem;
}

.stat-box p {
  color: var(--secondary);
  margin: 0;
}

/* Contribution Graph */
.contribution-graph {
  background: white;
  padding: 2rem;
  border-radius: 16px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.contribution-graph h4 {
  font-weight: 700;
  color: var(--dark);
}

.graph-container {
  overflow-x: auto;
  padding: 1rem 0;
}

.contribution-calendar {
  display: grid;
  grid-template-rows: repeat(7, 12px);
  grid-auto-flow: column;
  gap: 3px;
  min-width: 800px;
}

.contribution-day {
  width: 12px;
  height: 12px;
  border-radius: 2px;
  background: #ebedf0;
  cursor: pointer;
  transition: all 0.2s ease;
}

.contribution-day:hover {
  transform: scale(1.5);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  z-index: 10;
}

.contribution-day.level-0 {
  background: #ebedf0;
}
.contribution-day.level-1 {
  background: #9be9a8;
}
.contribution-day.level-2 {
  background: #40c463;
}
.contribution-day.level-3 {
  background: #30a14e;
}
.contribution-day.level-4 {
  background: #216e39;
}

.contribution-legend {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  justify-content: flex-end;
  font-size: 0.85rem;
  color: var(--secondary);
  margin-top: 1rem;
}

.legend-box {
  width: 12px;
  height: 12px;
  border-radius: 2px;
}

.legend-box.level-0 {
  background: #ebedf0;
}
.legend-box.level-1 {
  background: #9be9a8;
}
.legend-box.level-2 {
  background: #40c463;
}
.legend-box.level-3 {
  background: #30a14e;
}
.legend-box.level-4 {
  background: #216e39;
}

/* Responsive */
@media (max-width: 768px) {
  .contribution-calendar {
    grid-template-rows: repeat(7, 10px);
    min-width: 600px;
  }

  .contribution-day {
    width: 10px;
    height: 10px;
  }

  .legend-box {
    width: 10px;
    height: 10px;
  }
}
/* Recent Activity */
.recent-activity {
  background: white;
  padding: 2rem;
  border-radius: 16px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.recent-activity h4 {
  font-weight: 700;
  color: var(--dark);
}

.activity-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.activity-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1rem;
  background: var(--light);
  border-radius: 12px;
  transition: all 0.3s ease;
}

.activity-item:hover {
  background: #e2e8f0;
  transform: translateX(5px);
}

.activity-icon {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: white;
  flex-shrink: 0;
}

.activity-icon.commit {
  background: var(--primary);
}
.activity-icon.pr {
  background: var(--success);
}
.activity-icon.star {
  background: var(--accent);
}
.activity-icon.repo {
  background: var(--secondary);
}

.activity-content {
  flex: 1;
}

.activity-content p {
  margin: 0;
  color: var(--dark);
  font-size: 0.95rem;
}

.activity-time {
  font-size: 0.85rem;
  color: var(--secondary);
}

/* Contact Section */
#contact {
  background: linear-gradient(135deg, var(--dark) 0%, #1e293b 100%);
}

#contact h2 {
  color: white;
}

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

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.contact-item i {
  font-size: 1.5rem;
  color: var(--accent);
  margin-top: 0.25rem;
}

.contact-item h5 {
  font-size: 1rem;
  font-weight: 600;
  color: white;
  margin-bottom: 0.25rem;
}

.contact-item p {
  color: #cbd5e1;
  margin: 0;
}

.contact-form {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  padding: 2rem;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.contact-form .form-control {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: white;
  padding: 0.875rem 1rem;
  border-radius: 8px;
}

.contact-form .form-control:focus {
  background: rgba(255, 255, 255, 0.15);
  border-color: var(--accent);
  color: white;
  box-shadow: 0 0 0 0.2rem rgba(245, 158, 11, 0.25);
}

.contact-form .form-control::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

.contact-form .btn-primary {
  padding: 0.875rem;
  font-weight: 600;
  border-radius: 8px;
  background: var(--accent);
  border: none;
  transition: all 0.3s ease;
}

.contact-form .btn-primary:hover {
  background: #d97706;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(245, 158, 11, 0.3);
}

/* Footer */
.footer {
  background: #000000;
  color: #64748b;
  padding: 2rem 0;
}

.footer-social {
  display: flex;
  gap: 1rem;
  justify-content: center;
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.1);
  color: #94a3b8;
  transition: all 0.3s ease;
}

.footer-social a:hover {
  background: var(--accent);
  color: white;
  transform: translateY(-3px);
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.5rem;
  }

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

  .hero-subtitle {
    font-size: 1rem;
  }

  .section {
    padding: 3rem 0;
  }

  .section h2 {
    font-size: 2rem;
  }

  .about-stats {
    gap: 1rem;
  }

  .stat-item {
    min-width: 100px;
  }

  .timeline {
    padding-left: 30px;
  }

  .timeline-dot {
    left: -37px;
  }

  .project-links {
    flex-direction: column;
  }

  .contribution-calendar {
    grid-template-columns: repeat(53, 10px);
  }

  .contribution-day {
    width: 10px;
    height: 10px;
  }

  .footer-social {
    justify-content: center;
  }
}

@media (min-width: 769px) {
  .footer-social {
    justify-content: flex-end;
  }
}