:root {
  /* Color Tokens */
  --md-primary: #1A237E;
  --md-on-primary: #FFFFFF;
  --md-primary-container: #C5CAE9;
  --md-on-primary-container: #0D1259;
  --md-secondary: #0D47A1;
  --md-on-secondary: #FFFFFF;
  --md-tertiary: #00695C;
  --md-on-tertiary: #FFFFFF;
  --md-surface: #FAFAFA;
  --md-surface-dim: #F5F5F5;
  --md-surface-bright: #FFFFFF;
  --md-surface-container: #EEEEEE;
  --md-surface-container-low: #F5F5F5;
  --md-surface-container-high: #E0E0E0;
  --md-on-surface: #212121;
  --md-on-surface-variant: #616161;
  --md-outline: #BDBDBD;
  --md-outline-variant: #E0E0E0;
  --md-error: #B00020;
  --md-success: #00796B;
  --md-warning: #F57F17;
  --cl-purple: #6944BA;

  /* Shape */
  --md-shape-xs: 4px;
  --md-shape-sm: 8px;
  --md-shape-md: 12px;
  --md-shape-lg: 16px;
  --md-shape-xl: 28px;
  --md-shape-full: 9999px;

  /* Motion */
  --md-easing-standard: cubic-bezier(0.2, 0, 0, 1);
  --md-duration-short: 200ms;
  --md-duration-medium: 400ms;
}

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

body {
  font-family: 'Roboto', sans-serif;
  font-size: 14px;
  font-weight: 400;
  line-height: 1.5;
  color: var(--md-on-surface);
  background-color: var(--md-surface);
  display: flex;
  min-height: 100vh;
}

/* Navigation Rail */
.nav-rail {
  width: 80px;
  background-color: var(--md-surface-bright);
  border-right: 1px solid var(--md-outline-variant);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 16px 0;
  position: fixed;
  left: 0;
  top: 0;
  height: 100vh;
  z-index: 1000;
  overflow-y: auto;
}

.nav-rail-brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  margin-bottom: 24px;
  text-decoration: none;
  color: var(--md-primary);
  cursor: pointer;
}

.nav-rail-brand-icon {
  font-size: 28px;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-rail-brand-text {
  font-size: 10px;
  font-weight: 500;
  text-align: center;
  line-height: 1.2;
  max-width: 70px;
}

.nav-rail-divider {
  width: 56px;
  height: 1px;
  background-color: var(--md-outline-variant);
  margin: 16px 0;
}

.nav-rail-section {
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
  margin-bottom: 16px;
  width: 100%;
}

.nav-rail-section-label {
  font-size: 10px;
  font-weight: 500;
  color: var(--md-on-surface-variant);
  margin-top: 8px;
  margin-bottom: 4px;
  text-align: center;
  width: 100%;
}

.nav-rail-item {
  width: 56px;
  height: 56px;
  border-radius: var(--md-shape-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: var(--md-on-surface-variant);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--md-duration-short) var(--md-easing-standard);
  position: relative;
}

.nav-rail-item:hover {
  background-color: var(--md-surface-container);
  color: var(--md-primary);
}

.nav-rail-item.active {
  background-color: var(--md-primary-container);
  color: var(--md-primary);
}

/* Main Content */
main {
  flex: 1;
  margin-left: 80px;
  width: calc(100% - 80px);
  overflow-y: auto;
}

/* Content Container */
.content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px;
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--md-primary) 0%, var(--md-secondary) 100%);
  color: var(--md-on-primary);
  padding: 80px 40px;
  border-radius: var(--md-shape-lg);
  margin-bottom: 60px;
  text-align: center;
}

.hero-chip {
  display: inline-block;
  background-color: rgba(255, 255, 255, 0.2);
  color: var(--md-on-primary);
  padding: 6px 12px;
  border-radius: var(--md-shape-full);
  font-size: 12px;
  font-weight: 500;
  margin-bottom: 24px;
}

.hero h1 {
  font-family: 'Roboto Slab', serif;
  font-size: 48px;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 16px;
}

.hero-subtitle {
  font-size: 16px;
  line-height: 1.6;
  margin-bottom: 32px;
  opacity: 0.95;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-meta {
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
  font-size: 13px;
  opacity: 0.9;
}

.hero-meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Lead Text */
.lead {
  font-size: 20px;
  font-weight: 500;
  line-height: 1.6;
  color: var(--md-primary);
  margin-bottom: 24px;
}

/* Section Label */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--md-on-surface-variant);
  margin-bottom: 12px;
}

.section-label-icon {
  font-size: 16px;
}

/* Typography */
h2 {
  font-family: 'Roboto Slab', serif;
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 24px;
  color: var(--md-on-surface);
}

h3 {
  font-family: 'Roboto Slab', serif;
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--md-on-surface);
}

h4 {
  font-family: 'Roboto Slab', serif;
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--md-on-surface);
}

p {
  margin-bottom: 16px;
  line-height: 1.6;
}

a {
  color: var(--md-primary);
  text-decoration: none;
  transition: color var(--md-duration-short) var(--md-easing-standard);
}

a:hover {
  color: var(--md-secondary);
  text-decoration: underline;
}

/* Card Grid */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-bottom: 40px;
}

/* MD Card */
.md-card {
  background-color: var(--md-surface-bright);
  border-radius: var(--md-shape-md);
  padding: 24px;
  border: 1px solid var(--md-outline-variant);
  transition: all var(--md-duration-short) var(--md-easing-standard);
  display: flex;
  flex-direction: column;
}

.md-card:hover {
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  border-color: var(--md-outline);
}

.card-icon {
  font-size: 32px;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--md-shape-md);
  margin-bottom: 16px;
}

.card-icon.primary {
  background-color: var(--md-primary-container);
  color: var(--md-primary);
}

.card-icon.secondary {
  background-color: #C2D4F3;
  color: var(--md-secondary);
}

.card-icon.tertiary {
  background-color: #A3DEDC;
  color: var(--md-tertiary);
}

.card-icon.warning {
  background-color: #FEE5CC;
  color: var(--md-warning);
}

.md-card h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.md-card p {
  font-size: 14px;
  color: var(--md-on-surface-variant);
  margin-bottom: 0;
}

/* Metric Display */
.md-metric {
  background-color: var(--md-surface-container-low);
  border-radius: var(--md-shape-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.metric-row {
  display: flex;
  gap: 16px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.metric-row .md-metric {
  flex: 1;
  min-width: 140px;
}

.metric-value {
  font-family: 'Roboto Slab', serif;
  font-size: 32px;
  font-weight: 700;
  color: var(--md-primary);
  margin-bottom: 8px;
}

.metric-label {
  font-size: 12px;
  font-weight: 500;
  color: var(--md-on-surface-variant);
}

/* Chip */
.md-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: var(--md-shape-full);
  font-size: 12px;
  font-weight: 500;
}

.md-chip.success {
  background-color: #E8F5E9;
  color: var(--md-success);
}

.md-chip.warning {
  background-color: #FFF8E1;
  color: #F57F17;
}

.md-chip.error {
  background-color: #FFEBEE;
  color: var(--md-error);
}

.md-chip.info {
  background-color: var(--md-primary-container);
  color: var(--md-primary);
}

/* Banner */
.md-banner {
  background-color: var(--md-primary-container);
  border-left: 4px solid var(--md-primary);
  border-radius: var(--md-shape-sm);
  padding: 20px;
  margin: 32px 0;
  display: flex;
  gap: 16px;
}

.md-banner-icon {
  font-size: 24px;
  color: var(--md-primary);
  flex-shrink: 0;
}

.md-banner h4 {
  margin-bottom: 4px;
  color: var(--md-primary);
}

.md-banner p {
  margin-bottom: 0;
  color: var(--md-on-primary-container);
  font-size: 14px;
}

/* Table */
.md-table-container {
  overflow-x: auto;
  margin-bottom: 32px;
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--md-shape-md);
}

.md-table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--md-surface-bright);
}

.md-table thead {
  background-color: var(--md-surface-container);
  border-bottom: 2px solid var(--md-outline-variant);
}

.md-table th {
  padding: 16px;
  text-align: left;
  font-weight: 600;
  color: var(--md-on-surface);
  font-size: 13px;
  text-transform: uppercase;
}

.md-table td {
  padding: 16px;
  border-bottom: 1px solid var(--md-outline-variant);
  font-size: 14px;
}

.md-table tbody tr:hover {
  background-color: var(--md-surface-container-low);
}

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

/* Stepper */
.md-stepper {
  margin: 40px 0;
}

.step-item {
  display: flex;
  gap: 20px;
  margin-bottom: 32px;
  padding-bottom: 32px;
  border-left: 2px solid var(--md-outline-variant);
  padding-left: 20px;
  margin-left: 8px;
}

.step-item:last-child {
  border-left: none;
  padding-bottom: 0;
  margin-bottom: 0;
}

.step-number {
  background-color: var(--md-primary);
  color: var(--md-on-primary);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  flex-shrink: 0;
  margin-left: -31px;
  margin-top: -8px;
}

.step-content h4 {
  margin-bottom: 8px;
}

.step-content p {
  color: var(--md-on-surface-variant);
  margin-bottom: 0;
  font-size: 13px;
}

/* List */
.md-list {
  list-style: none;
  margin-bottom: 32px;
}

.md-list-item {
  display: flex;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--md-outline-variant);
  align-items: flex-start;
}

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

.md-list-icon {
  font-size: 24px;
  color: var(--md-primary);
  flex-shrink: 0;
}

.md-list-content h4 {
  margin-bottom: 4px;
}

.md-list-content p {
  margin-bottom: 0;
  color: var(--md-on-surface-variant);
  font-size: 14px;
}

/* Bar Chart */
.md-bar-container {
  margin: 40px 0;
}

.bar-item {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

.bar-label {
  min-width: 100px;
  font-weight: 500;
  font-size: 13px;
}

.bar-track {
  flex: 1;
  height: 32px;
  background-color: var(--md-surface-container);
  border-radius: var(--md-shape-sm);
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--md-primary) 0%, var(--md-secondary) 100%);
  border-radius: var(--md-shape-sm);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: 12px;
  color: var(--md-on-primary);
  font-weight: 600;
  font-size: 12px;
}

/* CTA Box */
.md-cta {
  background: linear-gradient(135deg, var(--md-primary) 0%, var(--md-secondary) 100%);
  color: var(--md-on-primary);
  border-radius: var(--md-shape-lg);
  padding: 40px;
  margin: 40px 0;
  text-align: center;
}

.md-cta h3 {
  color: var(--md-on-primary);
  margin-bottom: 12px;
}

.md-cta p {
  color: var(--md-on-primary);
  margin-bottom: 24px;
  opacity: 0.95;
}

.md-cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Button */
.md-btn {
  padding: 12px 24px;
  border-radius: var(--md-shape-sm);
  border: none;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--md-duration-short) var(--md-easing-standard);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.md-btn-primary {
  background-color: var(--md-primary);
  color: var(--md-on-primary);
}

.md-btn-primary:hover {
  background-color: var(--md-on-primary-container);
}

.md-btn-secondary {
  background-color: var(--md-surface-bright);
  color: var(--md-primary);
  border: 2px solid var(--md-primary);
}

.md-btn-secondary:hover {
  background-color: var(--md-primary-container);
}

.md-btn-ghost {
  background-color: rgba(255, 255, 255, 0.2);
  color: var(--md-on-primary);
  border: 2px solid var(--md-on-primary);
}

.md-btn-ghost:hover {
  background-color: rgba(255, 255, 255, 0.3);
}

/* Navigation Buttons */
.page-nav {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 60px;
  padding-top: 40px;
  border-top: 1px solid var(--md-outline-variant);
}

.page-nav .md-btn {
  flex: 1;
  text-align: center;
  justify-content: center;
}

/* Footer */
.page-footer {
  background-color: var(--md-surface-container);
  color: var(--md-on-surface-variant);
  text-align: center;
  padding: 32px 24px;
  font-size: 12px;
  margin-top: 60px;
  border-top: 1px solid var(--md-outline-variant);
}

/* Email Card */
.email-card {
  background-color: var(--md-surface-bright);
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--md-shape-md);
  overflow: hidden;
  margin-bottom: 32px;
}

.email-card-header {
  background-color: var(--md-surface-container);
  padding: 20px;
  border-bottom: 1px solid var(--md-outline-variant);
}

.email-card-header h3 {
  margin-bottom: 4px;
}

.email-number {
  display: inline-block;
  background-color: var(--md-primary);
  color: var(--md-on-primary);
  padding: 4px 8px;
  border-radius: var(--md-shape-xs);
  font-size: 11px;
  font-weight: 600;
  margin-right: 8px;
}

.email-card-body {
  padding: 24px;
}

.email-subject {
  background-color: var(--md-surface-container-low);
  padding: 12px;
  border-radius: var(--md-shape-sm);
  border-left: 3px solid var(--md-primary);
  font-weight: 500;
  font-size: 13px;
  margin-bottom: 16px;
  font-family: 'Courier New', monospace;
}

.email-timing {
  font-size: 12px;
  color: var(--md-on-surface-variant);
  margin-bottom: 16px;
  font-style: italic;
}

.email-body {
  font-size: 13px;
  line-height: 1.6;
  color: var(--md-on-surface);
  margin-bottom: 20px;
  white-space: pre-wrap;
  font-family: 'Courier New', monospace;
  background-color: var(--md-surface-dim);
  padding: 16px;
  border-radius: var(--md-shape-sm);
}

.email-strategic-note {
  background-color: #F0F4FF;
  border-left: 3px solid var(--md-secondary);
  padding: 12px 16px;
  border-radius: var(--md-shape-sm);
  font-size: 12px;
  color: var(--md-on-surface-variant);
}

/* Mobile Nav Fab */
.nav-fab {
  display: none;
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background-color: var(--md-primary);
  color: var(--md-on-primary);
  border: none;
  cursor: pointer;
  font-size: 24px;
  z-index: 999;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  transition: all var(--md-duration-short) var(--md-easing-standard);
}

.nav-fab:hover {
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
}

/* Responsive */
@media (max-width: 900px) {
  body {
    flex-direction: column;
  }

  .nav-rail {
    position: fixed;
    left: -80px;
    width: 80px;
    height: 100vh;
    transition: left var(--md-duration-medium) var(--md-easing-standard);
    z-index: 1001;
    box-shadow: 4px 0 8px rgba(0, 0, 0, 0.1);
  }

  .nav-rail.open {
    left: 0;
  }

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

  .nav-fab {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .content {
    padding: 24px;
  }

  .hero {
    padding: 60px 24px;
    margin-bottom: 40px;
  }

  .hero h1 {
    font-size: 32px;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .page-nav {
    flex-direction: column;
  }

  .page-nav .md-btn {
    width: 100%;
  }
}

/* Print Styles */
@media print {
  .nav-rail,
  .nav-fab,
  .page-nav {
    display: none;
  }

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

  .content {
    max-width: 100%;
    padding: 0;
  }

  body {
    flex-direction: column;
  }

  .hero {
    page-break-inside: avoid;
  }

  .md-card {
    page-break-inside: avoid;
  }

  .email-card {
    page-break-inside: avoid;
  }
}