/* Root variables for colors, spacing, typography */
:root {
  --color-primary: #4a90e2;
  --color-secondary: #7b2ff7;
  --color-bg: #f9f9f9;
  --color-text: #333333;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --max-width: 1200px;
  --transition-speed: 0.3s;
}

/* Dark mode overrides */
html.dark {
  --color-bg: #121212;
  --color-text: #eeeeee;
}

/* Global Resets */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: 'Arial', sans-serif;
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}
a {
  color: inherit;
  text-decoration: none;
}
ul {
  list-style: none;
}
img {
  max-width: 100%;
  display: block;
}

/* Container */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

/* Navbar */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-sm) 0;
  position: sticky;
  top: 0;
  background-color: var(--color-bg);
  z-index: 1000;
}
.logo {
  font-size: 1.5rem;
  font-weight: bold;
}
.nav-toggle {
  background: none;
  border: none;
  cursor: pointer;
}
.nav-toggle .hamburger,
.nav-toggle .hamburger::before,
.nav-toggle .hamburger::after {
  display: block;
  width: 25px;
  height: 3px;
  background-color: var(--color-text);
  border-radius: 2px;
  position: relative;
  transition: background var(--transition-speed);
}
.nav-toggle .hamburger::before {
  content: '';
  position: absolute;
  top: -8px;
}
.nav-toggle .hamburger::after {
  content: '';
  position: absolute;
  top: 8px;
}
.nav-menu {
  display: none;
  flex-direction: column;
  width: 100%;
  background-color: var(--color-bg);
}
.nav-menu li {
  margin: var(--spacing-xs) 0;
}
.nav-menu a {
  display: block;
  padding: var(--spacing-xs) 0;
}
.nav-menu.nav-open {
  display: flex;
}

/* Theme toggle */
.theme-toggle {
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  margin-left: var(--spacing-sm);
}

/* Hero Section */
.hero {
  background: linear-gradient(to bottom right, var(--color-primary), var(--color-secondary));
  color: #ffffff;
  text-align: center;
  padding: var(--spacing-lg) 0;
}
.hero-content h1 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
}
.hero-content p {
  font-size: 1.1rem;
  margin-bottom: var(--spacing-md);
}
.btn {
  display: inline-block;
  background: linear-gradient(45deg, var(--color-secondary), var(--color-primary));
  color: #ffffff;
  padding: var(--spacing-sm) var(--spacing-md);
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: opacity var(--transition-speed);
}
.btn:hover {
  opacity: 0.9;
}
.btn-primary {
  background: var(--color-secondary);
}

/* Grid layouts */
.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
}
@media (min-width: 768px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 992px) {
  .card-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
.card {
  background-color: #ffffff;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  transition: transform var(--transition-speed);
}
.card:hover {
  transform: translateY(-5px);
}
.card img {
  width: 100%;
  height: 150px;
  object-fit: cover;
}
.card h3 {
  margin: var(--spacing-sm);
}
.card p {
  margin: 0 var(--spacing-sm) var(--spacing-sm);
}
.card-link {
  display: block;
  margin: 0 var(--spacing-sm) var(--spacing-md);
  color: var(--color-primary);
  font-weight: bold;
}

/* Sections and typography */
section {
  padding: var(--spacing-lg) 0;
}
section h2 {
  text-align: center;
  margin-bottom: var(--spacing-md);
}

/* Quick Tips box */
.quick-tips {
  background-color: #ffffff;
  border-left: 4px solid var(--color-secondary);
  padding: var(--spacing-md);
  margin: var(--spacing-lg) 0;
}
.quick-tips ul {
  list-style: disc inside;
}

/* Accordion */
.accordion-header {
  background-color: var(--color-primary);
  color: #ffffff;
  padding: var(--spacing-sm);
  cursor: pointer;
  margin-bottom: var(--spacing-xs);
}
.accordion-header.active {
  background-color: var(--color-secondary);
}
.accordion-content {
  max-height: 0;
  overflow: hidden;
  background-color: #ffffff;
  transition: max-height var(--transition-speed) ease;
  padding: 0 var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

/* Animate on scroll */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.animated {
  opacity: 1;
  transform: translateY(0);
}

/* Back to top and scroll progress */
#scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 4px;
  background: var(--color-secondary);
  width: 0;
  z-index: 2000;
}
#back-to-top {
  position: fixed;
  bottom: var(--spacing-lg);
  right: var(--spacing-lg);
  background-color: var(--color-secondary);
  color: #ffffff;
  border: none;
  padding: var(--spacing-sm);
  border-radius: 50%;
  font-size: 1.2rem;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
}
#back-to-top.show {
  display: flex;
}

/* Search input */
#search-input {
  width: 100%;
  padding: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
  border: 1px solid #cccccc;
  border-radius: 4px;
}

/* Footer */
.site-footer {
  background-color: var(--color-primary);
  color: #ffffff;
  padding: var(--spacing-lg) 0;
  text-align: center;
}
.site-footer a {
  color: #ffffff;
  margin: 0 var(--spacing-xs);
}
.newsletter form {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
}
.newsletter input[type="email"] {
  padding: var(--spacing-sm);
  border: none;
  border-radius: 4px 0 0 4px;
  flex: 1 1 200px;
}
.newsletter button {
  padding: var(--spacing-sm) var(--spacing-md);
  border: none;
  background-color: var(--color-secondary);
  color: #ffffff;
  border-radius: 0 4px 4px 0;
  cursor: pointer;
}
.social-share button {
  background: transparent;
  border: 1px solid #ffffff;
  color: #ffffff;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: 4px;
  cursor: pointer;
  margin: 0 var(--spacing-xs);
}