* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
:root {
  --primary-color: #4CAF50;
  --primary-dark: #388E3C;
  --primary-light: #81C784;
  --secondary-color: #2196F3;
  --text-color: #333;
  --text-light: #767676;
  --bg-color: #f8f8f8;
  --card-bg: #ffffff;
  --border-radius: 10px;
  --transition: all 0.3s ease;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  --gradient: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  --btn-gradient: linear-gradient(135deg, #4CAF50, #2196F3);
  --dot-pattern: radial-gradient(var(--primary-light) 1px, transparent 1px);
}

.dark-theme {
  --primary-color: #65e469;  /* Lighter Green */
  --secondary-color: #64b5fc; /* Lighter Blue */
  --bg-color: #1a1a1a;
  --text-color: #f0f0f0;
  --card-bg: #2a2a2a;
  --shadow: 0 5px 15px rgba(0,0,0,0.2);
  --dot-pattern: radial-gradient(#65e469 1px, transparent 1px);
}

body {
  font-family: 'Open Sans', Arial, sans-serif;
  margin: 0;
  padding: 0;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  background-image: var(--dot-pattern);
  background-size: 20px 20px;
  transition: background-color 0.3s, color 0.3s;
}

/* Logo and Navigation */
nav {
  background-color: rgba(255, 255, 255, 0.95);
  padding: 15px 30px;
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 20px;
  background-color: var(--bg-color);
}


nav .logo {
  font-size: 2rem;
  font-weight: 700;
  background: var(--gradient);
  color: white;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

nav ul {
  list-style-type: none;
  display: flex;
}

nav ul li {
  margin: 0 15px;
}

nav ul li a {
  color: var(--text-color);
  text-decoration: none;
  font-size: 16px;
  font-weight: 500;
  padding: 5px 10px;
  border-radius: 5px;
  transition: var(--transition);
  position: relative;
}

nav ul li a:hover {
  color: var(--primary-color);
}

/* Current page indicator */
nav ul li a.active {
  color: var(--primary-color);
}

nav ul li a.active::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 3px;
  background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
  bottom: -5px;
  left: 0;
}

/* Theme Toggle */
nav ul li a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: 0;
  left: 0;
  background: var(--gradient);
  transition: var(--transition);
}

nav ul li a:hover::after,
nav ul li a.active::after {
  width: 100%;
}

nav ul li a.active {
  font-weight: 600;
}

.theme-toggle {
  cursor: pointer;
  font-size: 1.2rem;
  transition: var(--transition);
}

.theme-toggle:hover {
  transform: rotate(30deg);
}

/* Page Header */
.page-header {
  text-align: center;
  padding: 80px 20px 60px;
}

.gradient-text {
  background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: inline-block;
  font-size: 3.5rem;
  font-weight: 700;
  margin-bottom: 25px;
}

.page-header p {
  font-size: 1.3rem;
  max-width: 800px;
  margin: 0 auto 30px;
  color: var(--text-color);
}

.header-underline {
  width: 120px;
  height: 5px;
  background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
  margin: 0 auto;
  border-radius: 5px;
}

/* Projects Section */
.projects-container {
  max-width: 1200px;
  margin: 40px auto;
  padding: 0 20px;
}

/* Project Card - Grid Layout */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 2rem;
  margin-top: 30px;
}

.project-card {
  background: var(--card-bg);
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 30px rgba(0,0,0,0.12);
}

.project-image {
  position: relative;
  height: 200px;
  overflow: hidden;
  cursor: pointer;
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.project-image:hover img {
  transform: scale(1.05);
}

.project-content {
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.project-title {
  font-size: 1.4rem;
  font-weight: 700;
  margin: 0 0 10px 0;
  color: var(--text-color);
  cursor: pointer;
}

.project-title:hover {
  color: var(--primary-color);
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 15px;
}

.project-tag {
  background-color: rgba(76, 176, 80, 0.1); /* Lighter green background */
  color: var(--primary-color);
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
}

.project-summary {
  color: var(--text-color);
  opacity: 0.8;
  font-size: 0.95rem;
  margin-bottom: 15px;
  line-height: 1.5;
}

.project-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: auto;
  gap: 10px;
}

.toggle-details {
  background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
  color: white;
  border: none;
  padding: 8px 16px;
  border-radius: 5px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--transition);
  flex-grow: 1;
  text-align: center;
}

.toggle-details:hover {
  opacity: 0.9;
  transform: translateY(-2px);
}

.project-details {
  margin-top: 15px;
  padding-top: 15px;
  border-top: 1px solid #eee;
  font-size: 0.95rem;
}

.project-details p {
  margin: 10px 0;
}

.project-details strong {
  color: var(--text-color);
  font-weight: 600;
}

.hidden {
  display: none;
}

/* Project metrics visualization */
.metrics-container {
  margin-top: 15px;
  background-color: rgba(0,0,0,0.03);
  padding: 15px;
  border-radius: 8px;
}

.metric-bar {
  height: 6px;
  background-color: rgba(0,0,0,0.05);
  border-radius: 3px;
  margin-bottom: 15px;
  position: relative;
}

.metric-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  border-radius: 3px;
  position: absolute;
  top: 0;
  left: 0;
}

.metric-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-color);
  opacity: 0.7;
  margin-bottom: 5px;
}

/* Footer */
footer {
  background-color: #222;
  color: white;
  padding: 60px 20px 20px;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 30px;
}

.footer-info h3 {
  font-size: 1.5rem;
  margin-bottom: 10px;
  background: var(--gradient);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.footer-info p {
  color: #ccc;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .project-grid {
    grid-template-columns: 1fr;
  }
  
  .navbar {
    flex-direction: column;
    padding: 15px;
  }
  
  .logo {
    margin-bottom: 15px;
  }
  
  nav ul {
    flex-direction: column;
    align-items: center;
    padding: 5px 0;
  }
  
  nav ul li {
    margin: 5px 0;
  }
  
  .gradient-text {
    font-size: 2.5rem;
  }
  
  .page-header p {
    font-size: 1.1rem;
  }
  
  .theme-toggle {
    position: absolute;
    top: 15px;
    right: 15px;
  }
}