.dashboard-core {
  --sidebar-from: #4f46e5;
  --sidebar-to: #0ea5e9;
  --sidebar-text: #ffffff;
  display: grid;
  grid-template-columns: 280px 1fr;
  min-height: 100vh;
  font-family: Inter, system-ui, -apple-system, sans-serif;
  background: #f3f6ff;
}

.dashboard-core-sidebar {
  background: linear-gradient(180deg, var(--sidebar-from), var(--sidebar-to));
  color: var(--sidebar-text);
  padding: 1rem;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.dashboard-core-sidebar-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.dashboard-core-user-name {
  margin: 0;
  font-weight: 600;
}

.dashboard-core-logout {
  color: var(--sidebar-text);
  opacity: 0.85;
  text-decoration: underline;
  font-size: 0.875rem;
}

.dashboard-core-nav {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.dashboard-core-nav-item {
  border: 0;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  border-radius: 0.8rem;
  background: transparent;
  color: inherit;
  font-weight: 500;
  padding: 0.65rem 0.75rem;
  cursor: pointer;
  transition: all 0.25s ease;
}

.dashboard-core-nav-item:hover,
.dashboard-core-nav-item.is-active {
  background: rgba(255, 255, 255, 0.2);
}

.dashboard-core-nav-icon svg {
  width: 1.2rem;
  height: 1.2rem;
}

.dashboard-core-main {
  display: grid;
  grid-template-rows: auto 1fr;
}

.dashboard-core-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid #d8e1ff;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.dashboard-core-title {
  margin: 0;
  color: #111827;
}

.dashboard-core-subtitle {
  margin: 0.35rem 0 0;
  color: #667085;
}

.dashboard-core-content {
  padding: 1.5rem;
}

.dashboard-core-panel {
  background: linear-gradient(180deg, #ffffff, #f7f9ff);
  border-radius: 1rem;
  box-shadow: 0 8px 24px rgba(16, 24, 40, 0.07);
  padding: 1.25rem;
}

.dashboard-core-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.dashboard-core-grid article {
  border-radius: 0.8rem;
  padding: 1rem;
  background: linear-gradient(120deg, #eef2ff, #e0f2fe);
}

.dashboard-core-list {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.dashboard-core-loader {
  display: none;
  padding: 0 1.5rem;
}

.dashboard-core-loader.is-loading {
  display: block;
}

.dashboard-core-spinner {
  width: 36px;
  height: 36px;
  border: 4px solid #e2e8f0;
  border-top-color: #2563eb;
  border-radius: 50%;
  animation: dashboard-core-spin 0.8s linear infinite;
}

.dashboard-core-fade-in {
  animation: dashboard-core-fade-in 0.2s ease;
}

.dashboard-core-hamburger {
  display: none;
  background: transparent;
  border: 0;
  padding: 0.4rem 0.2rem;
}

.dashboard-core-hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background: #fff;
  margin: 4px 0;
}

@media (prefers-color-scheme: dark) {
  .dashboard-core {
    background: #0f172a;
  }

  .dashboard-core-header {
    border-color: #1e293b;
  }

  .dashboard-core-title,
  .dashboard-core-panel {
    color: #e2e8f0;
  }

  .dashboard-core-panel {
    background: linear-gradient(180deg, #0b1220, #111827);
  }
}

@media (max-width: 900px) {
  .dashboard-core {
    grid-template-columns: 1fr;
  }

  .dashboard-core-sidebar {
    position: fixed;
    left: -100%;
    width: 280px;
    z-index: 1000;
    transition: left 0.25s ease;
  }

  .dashboard-core-sidebar.is-open {
    left: 0;
  }

  .dashboard-core-hamburger {
    display: inline-block;
    margin-bottom: 0.75rem;
  }
}

@keyframes dashboard-core-spin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes dashboard-core-fade-in {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}