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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    sans-serif;
  line-height: 1.6;
  color: #333;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  transition: all 0.3s ease;
}

/* Dark mode styles */
body.dark-mode {
  background: linear-gradient(135deg, #0f0f23 0%, #1a1a2e 100%);
  color: #e2e8f0;
}

body.dark-mode .navbar {
  background: rgba(15, 15, 35, 0.95);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

body.dark-mode .nav-link {
  color: #e2e8f0;
}

body.dark-mode .nav-link:hover {
  color: #667eea;
}

body.dark-mode .section-title {
  color: #e2e8f0;
}

body.dark-mode .section-subtitle {
  color: rgba(226, 232, 240, 0.8);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 600;
  line-height: 1.2;
}

h1 {
  font-size: 3rem;
}
h2 {
  font-size: 2.5rem;
}
h3 {
  font-size: 2rem;
}
h4 {
  font-size: 1.5rem;
}
h5 {
  font-size: 1.25rem;
}
h6 {
  font-size: 1rem;
}

/* Dark mode toggle */
.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 1001;
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 50px;
  padding: 10px 15px;
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
  color: white;
  font-size: 0.9rem;
  font-weight: 500;
}

.theme-toggle:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: scale(1.05);
}

.theme-toggle-icon {
  font-size: 1.2rem;
  transition: transform 0.3s ease;
}

body.dark-mode .theme-toggle {
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

body.dark-mode .theme-toggle:hover {
  background: rgba(0, 0, 0, 0.5);
}