:root {
  --ttos-bg-green: #2e5a44;
  --ttos-surface-dark: #234533;
  --ttos-accent: #a3e635;
  --ttos-text: #ffffff;
  --ttos-muted: rgba(255, 255, 255, 0.84);
  --ttos-line: rgba(255, 255, 255, 0.18);
  --ttos-max-width: 800px;
  --ttos-line-height: 1.65;
}

* {
  box-sizing: border-box;
}

body {
  background: var(--ttos-bg-green);
  color: var(--ttos-text);
  font-family: Arial, Helvetica, sans-serif;
  line-height: var(--ttos-line-height);
  margin: 0;
}

.ttos-container {
  max-width: var(--ttos-max-width);
  margin: 0 auto;
  padding: 48px 16px;
}

.ttos-nav-shell {
  background: var(--ttos-surface-dark);
  border-bottom: 1px solid var(--ttos-line);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.ttos-nav-inner {
  max-width: var(--ttos-max-width);
  margin: 0 auto;
  padding: 10px 16px;
}

.ttos-nav-scroller {
  overflow-x: auto;
  overflow-y: hidden;
  white-space: nowrap;
  -webkit-overflow-scrolling: touch;
}

.ttos-nav-links {
  display: inline-flex;
  gap: 18px;
  white-space: nowrap;
}

.ttos-nav-links a {
  color: var(--ttos-text);
  text-decoration: none;
  font-size: 0.95rem;
}

.ttos-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 16px;
  margin: 24px 0;
}

.ttos-card {
  background: var(--ttos-surface-dark);
  border: 1px solid var(--ttos-line);
  border-radius: 14px;
  padding: 18px;
  height: 280px;
  overflow-y: auto;
  overflow-x: hidden;
  align-self: start;
}

.ttos-boundary {
  border: 1px solid var(--ttos-line);
  border-radius: 14px;
  padding: 18px;
  margin: 32px 0;
  color: var(--ttos-muted);
}

.ttos-muted {
  color: var(--ttos-muted);
}