:root {
  --df-dark: #0b2d4d;
  --df-blue: #2f80ed;
  --df-bg: #f4f7fb;
  --df-border: #dde5ef;
  --df-text: #172033;
  --df-muted: #6b778c;
  --df-panel: #ffffff;
}

[data-theme="dark"] {
  --df-dark: #071827;
  --df-blue: #4fa3ff;
  --df-bg: #101722;
  --df-border: #243244;
  --df-text: #edf4ff;
  --df-muted: #aab8cc;
  --df-panel: #172232;
}

body {
  background: var(--df-bg);
  color: var(--df-text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
}

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

.sidebar {
  background: var(--df-dark);
  color: #fff;
  padding: 18px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 6px 22px;
  border-bottom: 1px solid rgba(255,255,255,.14);
  margin-bottom: 16px;
}

.brand-logo {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  background: #fff;
  color: var(--df-dark);
  display: grid;
  place-items: center;
  font-weight: 800;
  overflow: hidden;
  padding: 4px;
}

.brand-logo img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.brand-title {
  font-size: .95rem;
  font-weight: 800;
  line-height: 1.15;
}

.nav-btn {
  width: 100%;
  color: rgba(255,255,255,.82);
  background: transparent;
  border: 0;
  border-radius: 8px;
  padding: 11px 12px;
  display: flex;
  align-items: center;
  gap: 10px;
  text-align: left;
  text-decoration: none;
  transition: .18s ease;
  font-weight: 600;
}

.nav-btn:hover,
.nav-btn.active {
  color: #fff;
  background: rgba(79,163,255,.22);
}

.main {
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.topbar {
  background: var(--df-panel);
  border-bottom: 1px solid var(--df-border);
  padding: 14px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  position: sticky;
  top: 0;
  z-index: 10;
}

.content {
  padding: 22px;
}

.panel,
.metric,
.table-wrap {
  background: var(--df-panel);
  border: 1px solid var(--df-border);
  border-radius: 8px;
}

.metric {
  padding: 18px;
  min-height: 122px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.metric small,
.muted {
  color: var(--df-muted);
}

.metric strong {
  display: block;
  font-size: 1.65rem;
  margin-top: 8px;
}

.icon-box {
  width: 42px;
  height: 42px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: rgba(47,128,237,.12);
  color: var(--df-blue);
  flex: 0 0 auto;
}

.panel-header {
  padding: 16px 18px;
  border-bottom: 1px solid var(--df-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.panel-body {
  padding: 18px;
}

.form-control,
.form-select {
  border-color: var(--df-border);
  background-color: var(--df-panel);
  color: var(--df-text);
}

.btn-primary {
  background: var(--df-blue);
  border-color: var(--df-blue);
}

.table {
  --bs-table-bg: transparent;
  --bs-table-color: var(--df-text);
  --bs-table-border-color: var(--df-border);
}

.badge-soft {
  background: rgba(47,128,237,.12);
  color: var(--df-blue);
  border: 1px solid rgba(47,128,237,.2);
}

.login-screen {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  background: linear-gradient(135deg, rgba(11,45,77,.95), rgba(47,128,237,.82));
}

.login-box {
  width: min(430px, 100%);
  background: #fff;
  color: #172033;
  border-radius: 8px;
  padding: 28px;
  box-shadow: 0 24px 80px rgba(0,0,0,.22);
}

@media (max-width: 992px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    height: auto;
    position: relative;
  }

  .nav-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 6px;
  }

  .content {
    padding: 16px;
  }
}