:root {
  --base-font-size: 1rem;
  --aws-orange: #ff9900;
  --aws-dark-blue: #232f3e;
  --aws-light-blue: #146eb4;
  --aws-squid-ink: #16191f;
  --aws-gray-100: #f2f3f3;
  --aws-gray-200: #eaeded;
  --aws-gray-300: #d5dbdb;
  --aws-gray-600: #687078;
  --border-radius: 8px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
  --transition: all 0.2s ease;
}

* {
  margin: 0;
  padding: 0;
  font-family: "Amazon Ember", "Noto Sans", Arial, sans-serif;
  line-height: 1.6;
  box-sizing: border-box;
}

body {
  background: var(--aws-gray-100);
  color: var(--aws-dark-blue);
}

header {
  background: linear-gradient(135deg, var(--aws-squid-ink) 0%, var(--aws-dark-blue) 100%);
  position: relative;
  overflow: hidden;
}

header h1 {
  color: #fff;
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 300;
  text-align: center;
  padding: 2rem 0;
  margin: 0;
}

.container {
  display: flex;
  max-width: 72rem;
  margin: -2rem auto 0;
  gap: 1.5rem;
  padding: 0 1.5rem;
  height: calc(100vh - 200px);
  position: relative;
  z-index: 2;
}

.left-panel {
  flex: 1;
  background: #fff;
  border-radius: var(--border-radius);
  padding: 1.5rem;
  box-shadow: var(--shadow-md);
  overflow-y: auto;
}

.right-panel {
  flex: 1;
  background: #fff;
  border-radius: var(--border-radius);
  padding: 1.5rem;
  box-shadow: var(--shadow-md);
  overflow-y: auto;
}

.category {
  margin-bottom: 2rem;
}

.category h3 {
  color: var(--aws-dark-blue);
  font-size: 1.25rem;
  font-weight: 500;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--aws-gray-200);
}

.question-list {
  list-style: none;
  padding: 0;
}

.question-list li {
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.question-list a {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 0.8rem 1rem;
  text-decoration: none;
  color: var(--aws-dark-blue);
  background: var(--aws-gray-100);
  border-radius: calc(var(--border-radius) / 2);
  transition: var(--transition);
  border-left: 4px solid transparent;
  font-size: 0.875rem;
}

.question-number {
  font-weight: 600;
  color: var(--aws-dark-blue);
  min-width: 20px;
  flex-shrink: 0;
}

.question-text {
  flex: 1;
}

.question-list a:hover {
  background: #fff9f0;
  border-left-color: var(--aws-orange);
  transform: translateX(5px);
  color: var(--aws-light-blue);
}

.question-list a.active {
  background: var(--aws-light-blue);
  color: #fff;
  border-left-color: var(--aws-orange);
}

.full-page-link {
  float: right;
  color: var(--aws-light-blue);
  text-decoration: none;
  font-size: 0.875rem;
  padding: 0.25rem 0.5rem;
  border-radius: calc(var(--border-radius) / 2);
  transition: var(--transition);
}

.full-page-link:hover {
  background: var(--aws-orange);
  color: #fff;
}

.anecdote {
  background: linear-gradient(135deg, #fff9f0 0%, #fff4e4 100%);
  padding: 1.5rem;
  border-radius: var(--border-radius);
  margin: 2rem 0;
  border-left: 4px solid var(--aws-orange);
}

.anecdote h3 {
  color: var(--aws-dark-blue);
  margin-bottom: 1rem;
}

#question-detail {
  min-height: 300px;
}

#question-detail h2 {
  color: var(--aws-dark-blue);
  margin-bottom: 1rem;
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 400;
}

#question-detail h3 {
  color: var(--aws-light-blue);
  font-size: 1.25rem;
  font-weight: 500;
  margin: 1.5rem 0 1rem 0;
}

#question-detail p {
  color: var(--aws-dark-blue);
  font-size: var(--base-font-size);
  margin-bottom: 1rem;
  line-height: 1.6;
}

#question-detail ul {
  padding: 0 0 0 1.4rem;
  margin-bottom: 1rem;
}

#question-detail li {
  color: var(--aws-dark-blue);
  padding-left: 0.5rem;
  margin: 0.2rem 0;
}

.question-meta {
  background: linear-gradient(135deg, #fff9f0 0%, #fff4e4 100%);
  padding: 1rem;
  border-radius: calc(var(--border-radius) / 2);
  margin: 1rem 0;
  border-left: 4px solid var(--aws-orange);
}

.question-meta strong {
  color: var(--aws-dark-blue);
  font-weight: bold;
}

@media (max-width: 768px) {
  .container {
    flex-direction: column;
    height: auto;
    padding: 0 1rem;
  }
  
  header h1 {
    font-size: 1.6rem;
  }
}