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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background-color: #0d0d0d;
  color: #ffffff;
  line-height: 1.6;
  padding: 16px;
  padding-bottom: 32px;
  min-height: 100vh;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

/* Header */
.header {
  text-align: center;
  margin-bottom: 32px;
}

.header-icon {
  margin-bottom: 16px;
}

.header-title {
  font-size: 24px;
  font-weight: 700;
  color: #ffffff;
}

/* Table of Contents */
.toc {
  background: #1a1a1a;
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 32px;
}

.toc-item {
  display: block;
  color: #aaaaaa;
  text-decoration: none;
  padding: 10px 0;
  border-bottom: 1px solid #252525;
  transition: color 0.2s ease;
}

.toc-item:last-child {
  border-bottom: none;
}

.toc-item:hover {
  color: #ffffff;
}

.toc-num {
  color: #666;
  margin-right: 4px;
}

/* Content Sections */
.content {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.section {
  background: #1a1a1a;
  border-radius: 12px;
  padding: 20px;
}

.section-title {
  font-size: 18px;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid #333;
}

.section-body {
  color: #cccccc;
  font-size: 15px;
}

.section-body p {
  margin-bottom: 12px;
}

.section-body p:last-child {
  margin-bottom: 0;
}

.section-body strong {
  color: #ffffff;
}

.section-body ul {
  margin: 12px 0;
  padding-left: 20px;
}

.section-body li {
  margin-bottom: 8px;
}

.section-body .step {
  margin-bottom: 16px;
}

.section-body .step-title {
  color: #ffffff;
  font-weight: 600;
}

/* Footer */
.footer {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid #252525;
  text-align: center;
}

.disclaimer {
  color: #666;
  font-size: 13px;
  font-style: italic;
}