:root {
  --primary: #1e3a8a;
  --primary-light: #3b82f6;
  --accent: #f59e0b;
  --text-main: #1f2937;
  --text-muted: #4b5563;
  --bg-main: #f9fafb;
  --bg-card: #ffffff;
  --border: #e5e7eb;
  --danger: #dc2626;
  --success: #16a34a;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
  color: var(--text-main);
  background-color: var(--bg-main);
  line-height: 1.6;
}

.navbar {
  background-color: #ffffff;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.nav-container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--primary);
  font-weight: 700;
  font-size: 1.25rem;
}

.brand-badge {
  background: linear-gradient(135deg, #f59e0b, #ea580c);
  color: white;
  font-size: 0.75rem;
  padding: 0.2rem 0.5rem;
  border-radius: 9999px;
  font-weight: 600;
}

.nav-links {
  display: flex;
  gap: 1rem;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0.4rem 0.8rem;
  border-radius: 6px;
  transition: all 0.2s ease;
}

.nav-links a:hover, .nav-links a.active {
  color: var(--primary);
  background-color: #eff6ff;
}

.main-container {
  max-width: 900px;
  margin: 2.5rem auto;
  padding: 0 1.5rem;
}

.content-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2.5rem;
  box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05);
}

.page-header {
  border-bottom: 2px solid #f3f4f6;
  padding-bottom: 1.5rem;
  margin-bottom: 2rem;
}

.page-title {
  font-size: 2rem;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.meta-info {
  color: var(--text-muted);
  font-size: 0.9rem;
}

h2 {
  font-size: 1.35rem;
  color: #111827;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

h3 {
  font-size: 1.1rem;
  color: #374151;
  margin-top: 1.25rem;
  margin-bottom: 0.5rem;
}

p, ul, ol {
  margin-bottom: 1rem;
  color: #374151;
}

ul, ol {
  padding-left: 1.5rem;
}

li {
  margin-bottom: 0.4rem;
}

.highlight-box {
  background-color: #eff6ff;
  border-left: 4px solid var(--primary-light);
  padding: 1rem 1.25rem;
  border-radius: 0 8px 8px 0;
  margin: 1.5rem 0;
}

.warning-box {
  background-color: #fef2f2;
  border-left: 4px solid var(--danger);
  padding: 1rem 1.25rem;
  border-radius: 0 8px 8px 0;
  margin: 1.5rem 0;
}

.form-group {
  margin-bottom: 1.25rem;
}

label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: #374151;
  font-size: 0.95rem;
}

input[type="text"],
input[type="email"],
textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 1rem;
  font-family: inherit;
  transition: border-color 0.2s;
}

input:focus, textarea:focus {
  outline: none;
  border-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.btn {
  display: inline-block;
  background-color: var(--primary);
  color: white;
  border: none;
  padding: 0.8rem 1.5rem;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: background-color 0.2s;
}

.btn:hover {
  background-color: #1e40af;
}

.btn-danger {
  background-color: var(--danger);
}

.btn-danger:hover {
  background-color: #b91c1c;
}

.step-card {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
}

.step-number {
  display: inline-block;
  width: 28px;
  height: 28px;
  background: var(--primary);
  color: white;
  border-radius: 50%;
  text-align: center;
  line-height: 28px;
  font-weight: 700;
  font-size: 0.85rem;
  margin-right: 0.5rem;
}

footer {
  text-align: center;
  padding: 2.5rem 1.5rem;
  color: var(--text-muted);
  font-size: 0.9rem;
  border-top: 1px solid var(--border);
  background: white;
  margin-top: 4rem;
}

@media (max-width: 640px) {
  .content-card {
    padding: 1.5rem;
  }
  .page-title {
    font-size: 1.6rem;
  }
  .nav-container {
    flex-direction: column;
    align-items: flex-start;
  }
}