:root {
  --bg: #0b0d12;
  font-family: "Inter", "Segoe UI", system-ui, sans-serif;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: radial-gradient(circle at top right, rgba(0, 209, 255, 0.1), transparent 45%), #040608;
  color: #f5f7fb;
}
.dashboard-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 240px 1fr;
}
.dashboard-nav {
  background: rgba(8, 10, 14, 0.9);
  border-right: 1px solid rgba(255, 255, 255, 0.08);
  padding: 28px 12px;
}
.dashboard-header {
  padding: 16px 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.dashboard-nav h2 {
  margin: 0 0 18px;
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: #9fb4c8;
}
.dashboard-nav button {
  width: 100%;
  margin-bottom: 8px;
  border: none;
  background: transparent;
  padding: 12px 16px;
  text-align: left;
  font-size: 1rem;
  color: inherit;
  cursor: pointer;
  border-radius: 12px;
}
.dashboard-nav button.active,
.dashboard-nav button:hover {
  background: rgba(0, 209, 255, 0.1);
  box-shadow: 0 10px 30px rgba(0, 209, 255, 0.2);
}
.dashboard-content {
  background: #06070d;
  padding: 24px 28px 48px;
}
.dashboard-section {
  display: none;
}
.dashboard-section.active {
  display: block;
}
.section-grid {
  display: grid;
  gap: 18px;
}
.card {
  background: rgba(10, 13, 18, 0.9);
  border-radius: 18px;
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  box-shadow: 0 18px 30px rgba(0, 0, 0, 0.35);
}
.card header {
  font-size: 0.65rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: #8fa7bb;
  margin-bottom: 8px;
}
.card h3 {
  margin: 0;
  font-size: 1.4rem;
}
.theme-picker {
  display: flex;
  gap: 8px;
}
.theme-picker button {
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 999px;
  padding: 6px 10px;
  background: transparent;
  color: inherit;
  cursor: pointer;
}
.theme-picker button.active {
  border-color: rgba(0, 209, 255, 0.5);
  background: rgba(0, 209, 255, 0.12);
}
.language-toggle {
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 999px;
  padding: 6px 12px;
  background: transparent;
  cursor: pointer;
}
.dashboard-vault iframe {
  width: 100%;
  border: none;
  min-height: 720px;
  border-radius: 18px;
  overflow: hidden;
}
@media (max-width: 900px) {
  .dashboard-shell {
    grid-template-columns: 1fr;
  }
  .dashboard-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
  }
}