:root {
  --bg-primary: #f9fafb;
  --bg-secondary: #ffffff;
  --text-primary: #111827;
  --text-secondary: #4b5563;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] {
  --bg-primary: #111827;
  --bg-secondary: #1f2937;
  --text-primary: #ffffff;
  --text-secondary: #9ca3af;
  --accent: #60a5fa;
  --accent-hover: #3b82f6;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
}

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

body {
  font-family: system-ui, -apple-system, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  transition: background-color 0.3s, color 0.3s;
}

.loading-screen {
  position: fixed;
  inset: 0;
  background-color: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  transition: opacity 0.3s;
}

.loading-screen.hidden {
  opacity: 0;
  pointer-events: none;
}

.bounce {
  animation: bounce 1s infinite;
}

.loading-icon {
  width: 48px;
  height: 48px;
  color: var(--accent);
}

.loading-text {
  margin-left: 1rem;
  font-size: 1.5rem;
  font-weight: bold;
  animation: pulse 2s infinite;
}

.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background-color: var(--bg-secondary);
  box-shadow: var(--shadow);
  z-index: 50;
}

.navbar-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.navbar-left {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.navbar-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.menu-button,
.theme-button,
.social-link {
  padding: 0.5rem;
  border: none;
  background: none;
  color: var(--text-secondary);
  cursor: pointer;
  transition: color 0.3s;
}

.menu-button:hover,
.theme-button:hover,
.social-link:hover {
  color: var(--text-primary);
}

.logo {
  font-size: 1.25rem;
  font-weight: bold;
  color: var(--text-primary);
}

.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  height: 100%;
  width: 256px;
  background-color: var(--bg-secondary);
  box-shadow: var(--shadow);
  transform: translateX(-100%);
  transition: transform 0.3s;
  z-index: 40;
}

.sidebar.open {
  transform: translateX(0);
}

.sidebar-content {
  padding-top: 5rem;
  height: 100%;
  overflow-y: auto;
}

.sidebar-nav {
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: 0.375rem;
  transition: all 0.3s;
}

.sidebar-link:hover {
  background-color: var(--bg-primary);
  color: var(--text-primary);
}

.main-content {
  padding-top: 4rem;
  margin-left: 0;
  transition: margin-left 0.3s;
}

@media (min-width: 1024px) {
  .sidebar {
    transform: translateX(0);
  }
  
  .main-content {
    margin-left: 256px;
  }
}

.section {
  padding: 4rem 1rem;
}

.section-container {
  max-width: 48rem;
  margin: 0 auto;
}

.section-title {
  font-size: 1.875rem;
  font-weight: bold;
  margin-bottom: 2rem;
  color: var(--text-primary);
}

.about-card {
  background-color: var(--bg-secondary);
  border-radius: 0.5rem;
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: transform 0.3s;
}

.about-card:hover {
  transform: scale(1.02);
}

.profile-image {
  width: 100%;
  height: 16rem;
}

.profile-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about-text {
  padding: 2rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.skills-tags {
  padding: 0 2rem 2rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.tag {
  padding: 0.5rem 1rem;
  background-color: var(--accent);
  color: white;
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 500;
  transition: background-color 0.3s;
}

.tag:hover {
  background-color: var(--accent-hover);
}

.skills-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.skill-card {
  background-color: var(--bg-secondary);
  padding: 1.5rem;
  border-radius: 0.5rem;
  box-shadow: var(--shadow);
  transition: transform 0.3s;
}

.skill-card:hover {
  transform: scale(1.05);
}

.skill-card h3 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.skill-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.skill-list li {
  display: flex;
  align-items: center;
  color: var(--text-secondary);
  transition: transform 0.3s;
}

.skill-list li:hover {
  transform: translateX(0.5rem);
}

.skill-list li::before {
  content: "";
  display: inline-block;
  width: 0.5rem;
  height: 0.5rem;
  background-color: var(--accent);
  border-radius: 50%;
  margin-right: 0.5rem;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

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

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slide-up {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fade-in 0.6s ease-out forwards;
}

.slide-up {
  animation: slide-up 0.6s ease-out forwards;
}