NetMapper2026/frontend/src/app-shell.css

:root {
  color-scheme: dark;
  font-family: Inter, system-ui, sans-serif;
  background: #0b1020;
}

body {
  margin: 0;
  background: linear-gradient(180deg, #0b1020 0%, #111827 100%);
  color: #e5e7eb;
}

#root {
  min-height: 100vh;
}

.app-shell {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  min-height: 100vh;
}

.app-sidebar {
  border-right: 1px solid rgba(255,255,255,0.08);
  background: rgba(2, 6, 23, 0.75);
  backdrop-filter: blur(14px);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.app-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.app-brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, #1d4ed8, #2563eb);
  color: white;
  font-weight: 700;
}

.app-brand h1,
.app-header h2,
.shell-card h3 {
  margin: 0;
}

.app-brand p,
.app-header p {
  margin: 4px 0 0;
  color: #94a3b8;
}

.app-nav {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.app-nav-item {
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.03);
  border-radius: 12px;
  padding: 12px 14px;
  color: #e5e7eb;
  text-align: left;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.app-nav-item.active {
  background: rgba(37, 99, 235, 0.16);
  border-color: rgba(96, 165, 250, 0.35);
}

.app-nav-item small {
  color: #94a3b8;
}

.app-sidebar-footer,
.app-header-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.app-main {
  padding: 20px;
}

.app-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 20px;
}

.shell-pill {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(255,255,255,0.08);
  color: #cbd5e1;
  font-size: 12px;
}

.shell-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.shell-grid.two-columns {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.shell-card {
  background: rgba(17, 24, 39, 0.88);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 16px;
  padding: 16px;
}

.shell-card.accent {
  border-color: rgba(96, 165, 250, 0.35);
}

.shell-card.warning {
  border-color: rgba(251, 191, 36, 0.35);
}

.shell-card-body {
  margin-top: 12px;
}

.shell-list {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 8px;
  color: #cbd5e1;
}

@media (max-width: 1100px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .app-sidebar {
    border-right: 0;
    border-bottom: 1px solid rgba(255,255,255,0.08);
  }

  .shell-grid,
  .shell-grid.two-columns {
    grid-template-columns: 1fr;
  }
}