:root {
  --primary-color: #04AA6D;
  --primary-hover: #038a57;
  --bg-color: #ffffff;
  --sidebar-bg: #f1f1f1;
  --text-color: #2c3e50;
  --text-muted: #606f7b;
  --border-color: #e9ecef;
  --card-bg: #f8f9fa;
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Outfit', 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text-color);
  line-height: 1.6;
  background-color: var(--bg-color);
}

/* Layout */
.wrapper {
  display: flex;
  min-height: 100vh;
}

/* Sidebar styling (W3Schools inspired) */
.sidebar {
  width: 260px;
  background-color: var(--sidebar-bg);
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  overflow-y: auto;
  border-right: 1px solid var(--border-color);
  padding: 20px 0;
  z-index: 10;
}

.sidebar-header {
  padding: 10px 24px 20px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  margin-bottom: 15px;
}

.sidebar-header h3 {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary-color);
  display: flex;
  align-items: center;
  gap: 8px;
}

.sidebar-header p {
  margin: 4px 0 0;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.sidebar-menu {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sidebar-section-title {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  padding: 12px 24px 6px;
  font-weight: 700;
}

.sidebar-menu li a {
  display: block;
  padding: 10px 24px;
  color: #333333;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.2s ease;
  border-left: 4px solid transparent;
}

.sidebar-menu li a:hover {
  background-color: #e5e5e5;
  color: #000000;
}

.sidebar-menu li.active a {
  background-color: #ffffff;
  color: var(--primary-color);
  border-left-color: var(--primary-color);
  font-weight: 600;
}

/* Main Content Area */
.main-content {
  flex: 1;
  margin-left: 260px;
  padding: 40px 50px 80px;
  max-width: 1000px;
}

/* Header & Typography */
h1 {
  font-size: 2.25rem;
  font-weight: 800;
  color: #1e293b;
  margin-top: 0;
  margin-bottom: 20px;
}

h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: #334155;
  margin-top: 40px;
  margin-bottom: 16px;
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 8px;
}

h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: #475569;
  margin-top: 30px;
  margin-bottom: 12px;
}

p {
  margin-top: 0;
  margin-bottom: 16px;
  font-size: 1rem;
  color: #334155;
}

/* Navigation buttons (W3Schools prev/next) */
.nav-buttons {
  display: flex;
  justify-content: space-between;
  margin: 30px 0;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
}

.nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--primary-color);
  color: #ffffff;
  text-decoration: none;
  padding: 10px 20px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 4px;
  transition: background-color 0.2s ease;
}

.nav-btn:hover {
  background-color: var(--primary-hover);
}

.nav-btn.prev {
  background-color: #e2e8f0;
  color: #334155;
}

.nav-btn.prev:hover {
  background-color: #cbd5e1;
}

/* Callout Box / Card */
.tutorial-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 24px;
  margin: 24px 0;
  box-shadow: var(--shadow);
}

.tutorial-card.tip {
  border-left: 5px solid #3b82f6;
  background-color: #eff6ff;
}

.tutorial-card.warning {
  border-left: 5px solid #ef4444;
  background-color: #fef2f2;
}

.tutorial-card.info {
  border-left: 5px solid var(--primary-color);
  background-color: #e6f7f0;
}

/* Step list */
.step-list {
  list-style: none;
  padding: 0;
  margin: 24px 0;
}

.step-item {
  display: flex;
  gap: 16px;
  margin-bottom: 20px;
}

.step-num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--primary-color);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
  flex-shrink: 0;
}

.step-content h4 {
  margin: 4px 0 6px;
  font-size: 1.05rem;
  font-weight: 700;
  color: #1e293b;
}

/* Code container */
.code-container {
  background-color: #272822;
  color: #f8f8f2;
  border-radius: 6px;
  padding: 16px 20px;
  font-family: Consolas, Monaco, 'Andale Mono', 'Ubuntu Mono', monospace;
  font-size: 0.85rem;
  overflow-x: auto;
  margin: 20px 0;
}

/* Responsive design */
@media (max-width: 768px) {
  .wrapper {
    flex-direction: column;
  }
  .sidebar {
    width: 100%;
    position: relative;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }
  .main-content {
    margin-left: 0;
    padding: 30px 20px;
  }
}

.tutorial-img {
  width: 100%;
  max-width: 750px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  margin: 18px 0 24px 0;
  display: block;
}

/* FAQ Section Anchor Highlight Animation */
.faq-highlighted-section {
  position: relative;
  transition: all 0.4s ease !important;
}

.faq-highlighted-section.animate-glow {
  animation: border-swipe-glow 2s cubic-bezier(0.25, 0.8, 0.25, 1) forwards !important;
}

@keyframes border-swipe-glow {
  0% {
    box-shadow: 0 0 0 0px rgba(4, 170, 109, 0);
    border-color: var(--border-color);
  }
  15% {
    box-shadow: 0 0 0 8px rgba(4, 170, 109, 0.35);
    border-color: var(--primary-color);
    background-color: rgba(4, 170, 109, 0.06);
  }
  30% {
    box-shadow: 0 0 0 16px rgba(4, 170, 109, 0);
    border-color: var(--primary-color);
    background-color: rgba(4, 170, 109, 0.04);
  }
  100% {
    box-shadow: 0 0 0 0px rgba(4, 170, 109, 0);
    border-color: var(--border-color);
    background-color: transparent;
  }
}