:root {
  --text: #1a1a1a;
  --light-text: #555;
  --bg: #fafafa;
  --border: #ddd;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  font-family: "Source Sans Pro", sans-serif;
  color: var(--text);
  background: white;
  line-height: 1.6;
}

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

.sidebar-nav {
  position: fixed;
  left: 0;
  top: 0;
  width: 200px;
  height: 100vh;
  background-color: #f9f9f9;
  border-right: 1px solid var(--border);
  padding: 20px;
  overflow-y: auto;
  z-index: 100;
}

.nav-header {
  margin-bottom: 30px;
  padding-bottom: 15px;
  border-bottom: 1px solid var(--border);
}

.nav-header .back-link {
  font-size: 14px;
  color: #2196f3;
  text-decoration: none;
  font-weight: 600;
}

.nav-header .back-link:hover {
  text-decoration: underline;
}

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

.nav-list li {
  margin: 0 0 8px 0;
}

.nav-list a {
  display: block;
  padding: 10px 12px;
  color: var(--text);
  text-decoration: none;
  border-left: 3px solid transparent;
  transition: all 0.2s ease;
  font-size: 14px;
}

.nav-list a:hover {
  background-color: #f0f0f0;
  border-left-color: #2196f3;
  color: #2196f3;
}

.main-content {
  margin-left: 200px;
  flex: 1;
  width: calc(100% - 200px);
  padding-left: 2rem;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

/* Header and Navigation */
header {
  padding: 2rem 1.5rem;
  border-bottom: 2px solid var(--border);
  text-align: center;
}

header h1 {
  margin: 0;
  font-size: 2rem;
  font-weight: 700;
  font-family: "Merriweather", serif;
  color: var(--text);
}

.header-subtitle {
  margin: 0;
  color: var(--light-text);
  font-size: 1rem;
  font-weight: 400;
}

.back-link {
  color: #2196f3;
  text-decoration: none;
  font-weight: 600;
  transition: text-decoration 200ms ease;
}

.back-link:hover {
  text-decoration: underline;
}

/* Main Content */
main {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem 2rem 2rem 2rem;
}

main.main-page {
  margin: 0;
}

section {
  margin-bottom: 3rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}

section:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

h2 {
  margin: 0 0 1rem;
  font-size: 1.8rem;
  font-weight: 700;
  font-family: "Merriweather", serif;
  color: var(--text);
}

h3 {
  margin: 1.5rem 0 0.8rem;
  font-size: 1.1rem;
  font-weight: 600;
  font-family: "Source Sans Pro", sans-serif;
  color: var(--text);
}

h3:first-child {
  margin-top: 0;
}

p {
  margin: 0 0 1rem;
  color: var(--light-text);
  font-size: 1rem;
}

.subtitle {
  color: #888;
  font-size: 1.1rem;
  margin: 0;
}

ul {
  margin: 0 0 1rem;
  padding-left: 2rem;
  color: var(--light-text);
}

li {
  margin-bottom: 0.5rem;
}

strong {
  color: var(--text);
  font-weight: 600;
}

dl {
  margin: 0;
  color: var(--light-text);
}

dt {
  margin: 1rem 0 0.3rem;
  font-weight: 600;
  color: var(--text);
}

dd {
  margin: 0 0 0 1.5rem;
  padding: 0;
}

.table-wrapper {
  overflow-x: auto;
  margin: 1rem 0 1.5rem;
}

.benchmark-table {
  width: 100%;
  border-collapse: collapse;
  background: #fcfcfc;
  border: 1px solid var(--border);
}

.benchmark-table th,
.benchmark-table td {
  padding: 0.75rem 0.9rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
  font-size: 0.95rem;
  color: var(--light-text);
}

.benchmark-table th {
  background: #f4f4f4;
  color: var(--text);
  font-weight: 600;
}

.benchmark-table tr:last-child td {
  border-bottom: none;
}

.note {
  color: #999;
  font-style: italic;
  font-size: 0.95rem;
}

/* PDF Section */
.pdf-section {
  background: #f0f7ff;
  border: 2px solid #2196f3;
  border-radius: 8px;
  padding: 2rem;
  margin-bottom: 2rem;
}

.pdf-block h3 {
  margin-top: 0;
  color: #1565c0;
  font-size: 1.2rem;
}

.pdf-block p {
  margin: 0.8rem 0;
  color: var(--light-text);
}

.pdf-viewer {
  width: 100%;
  height: 600px;
  border: 1px solid #ccc;
  border-radius: 6px;
  overflow: hidden;
  margin: 1.5rem 0;
  background: #f9f9f9;
}

.pdf-viewer iframe {
  width: 100%;
  height: 100%;
  border: none;
}

.pdf-link {
  display: inline-block;
  background: #2196f3;
  color: white;
  padding: 0.8rem 1.5rem;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
  transition: background 200ms ease;
  margin: 0.5rem 0;
}

.pdf-link:hover {
  background: #1976d2;
}

.pdf-note {
  font-size: 0.85rem;
  color: #666;
  font-style: italic;
  margin-top: 1rem !important;
}

.pdf-note code {
  background: #fff;
  padding: 0.2rem 0.4rem;
  border-radius: 3px;
  font-family: monospace;
  color: #d32f2f;
}

/* Main Page Styles */
.sections-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin: 2rem 0;
  padding: 0;
  border: none;
}

.section-card {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 2rem;
  background: #fcfcfc;
  transition: all 200ms ease;
  display: flex;
  flex-direction: column;
}

.section-card:hover {
  border-color: #aaa;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.card-header {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1rem;
}

.card-number {
  font-size: 2rem;
  font-weight: 700;
  color: #ccc;
  line-height: 1;
  flex-shrink: 0;
}

.card-header h3 {
  margin: 0;
  font-size: 1.3rem;
}

.section-card p {
  flex-grow: 1;
  margin: 1rem 0;
  font-size: 0.95rem;
}

.card-link {
  display: inline-block;
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  border: 1px solid var(--border);
  padding: 0.7rem 1.2rem;
  border-radius: 4px;
  transition: all 200ms ease;
  margin-top: auto;
}

.card-link:hover {
  background: var(--text);
  color: white;
  border-color: var(--text);
}

.team-list {
  padding-left: 0;
  list-style: none;
}

.team-list li {
  margin-bottom: 0.3rem;
}

/* Footer */
footer {
  text-align: center;
  padding-top: 2rem;
  border-top: 2px solid var(--border);
  margin-top: 3rem;
  color: #888;
  font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 1200px) {
  .sidebar-nav {
    width: 180px;
  }

  .main-content {
    margin-left: 180px;
    width: calc(100% - 180px);
  }
}

@media (max-width: 900px) {
  .page-wrapper {
    flex-direction: column;
  }

  .sidebar-nav {
    position: static;
    width: 100%;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding: 15px 1.5rem;
  }

  .nav-header {
    display: inline-block;
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
    margin-right: 20px;
  }

  .nav-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0;
    margin-left: 20px;
  }

  .nav-list li {
    margin: 0;
    flex: 0 1 auto;
  }

  .nav-list a {
    padding: 8px 12px;
    border-left: none;
    border-bottom: 2px solid transparent;
    font-size: 13px;
  }

  .nav-list a:hover {
    border-left: none;
    border-bottom-color: #2196f3;
  }

  .main-content {
    margin-left: 0;
    width: 100%;
    padding-left: 0;
  }

  main {
    padding: 2rem 1.5rem;
  }

  .container {
    padding: 1.5rem 1rem;
  }

  header h1 {
    font-size: 1.5rem;
  }

  .header-subtitle {
    font-size: 0.9rem;
  }

  h2 {
    font-size: 1.4rem;
  }

  h3 {
    font-size: 1rem;
  }

  .sections-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}

@media (max-width: 600px) {
  .container {
    padding: 1.5rem 1rem;
  }

  header h1 {
    font-size: 1.3rem;
  }

  header {
    padding: 1.5rem 1rem;
  }

  h2 {
    font-size: 1.2rem;
  }

  h3 {
    font-size: 0.95rem;
  }

  .sidebar-nav {
    padding: 12px 1rem;
  }

  .nav-header {
    margin-right: 10px;
  }

  .nav-list {
    margin-left: 10px;
  }

  .nav-header .back-link {
    font-size: 12px;
  }

  .nav-list a {
    padding: 6px 8px;
    font-size: 12px;
  }

  .sections-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  main {
    padding: 1.5rem 1rem;
  }
}