:root {
  --primary: #0f9b0f;
  --primary-light: #38ef7d;
  --dark: #1f2937;
  --gray: #6b7280;
  --bg: #f9fafb;
}

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

body {
  font-family: "Segoe UI", Arial, sans-serif;
  background: var(--bg);
  color: var(--dark);
}

/* Layout */
.wrapper {
  display: flex;
  max-width: 1300px;
  margin: auto;
  padding: 40px 20px;
  gap: 40px;
}

/* Sidebar */
.sidebar {
  width: 260px;
  position: sticky;
  top: 30px;
  align-self: flex-start;
  background: white;
  padding: 25px;
  border-radius: 12px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.05);
  height: fit-content;
}

.sidebar h3 {
  margin-bottom: 15px;
  color: var(--primary);
}

.sidebar ul {
  list-style: none;
}

.sidebar ul li {
  margin-bottom: 10px;
}

.sidebar ul li a {
  text-decoration: none;
  color: var(--gray);
  font-size: 14px;
  transition: 0.3s;
}

.sidebar ul li a:hover {
  color: var(--primary);
  padding-left: 5px;
}

/* Content */
.content {
  flex: 1;
  background: white;
  padding: 50px;
  border-radius: 12px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.05);
}

.content h1 {
  font-size: 32px;
  margin-bottom: 10px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.effective {
  color: var(--gray);
  margin-bottom: 30px;
}

.content h2 {
  margin-top: 50px;
  margin-bottom: 15px;
  color: var(--primary);
  border-left: 4px solid var(--primary);
  padding-left: 10px;
}

.content p {
  margin-bottom: 15px;
  line-height: 1.7;
}

.content ul {
  margin-left: 20px;
  margin-bottom: 15px;
}

/* Responsive */
@media(max-width: 992px) {
  .wrapper {
    flex-direction: column;
  }
  .sidebar {
    width: 100%;
    position: relative;
  }
}