* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #0b1020;
  --panel: #121a2f;
  --panel-soft: #17213a;
  --border: #26304d;
  --text: #eaf0ff;
  --muted: #9aa8cc;
  --primary: #4f8cff;
  --success: #20c997;
  --warning: #f4b740;
  --danger: #ff6b6b;
  --shadow: 0 16px 40px rgba(4, 8, 20, 0.35);
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: radial-gradient(circle at top right, #1b2750 0%, #0b1020 50%, #090d18 100%);
  color: var(--text);
  line-height: 1.5;
  padding: 24px;
}

.app-shell {
  max-width: 1240px;
  margin: 0 auto;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
  padding: 22px;
  background: linear-gradient(160deg, rgba(79, 140, 255, 0.2), rgba(18, 26, 47, 0.96));
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow);
}

.topbar h1 {
  font-size: 1.45rem;
}

.subtitle {
  color: var(--muted);
  font-size: .95rem;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.service-pill {
  padding: 8px 12px;
  border-radius: 999px;
  font-size: .85rem;
  border: 1px solid var(--border);
  background: var(--panel);
}

.tabs {
  display: flex;
  gap: 10px;
  margin-bottom: 16px;
}

.tab-btn {
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--muted);
  border-radius: 10px;
  padding: 10px 14px;
  cursor: pointer;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px; /* Added for Icon spacing */
}

.tab-btn.active {
  color: white;
  border-color: transparent;
  background: linear-gradient(135deg, #4f8cff, #2f6cdf);
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(140px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}

.kpi-card {
  padding: 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: linear-gradient(160deg, rgba(255,255,255,0.04), rgba(255,255,255,0.01));
}

.kpi-title {
  color: var(--muted);
  font-size: .82rem;
  margin-bottom: 6px;
}

.kpi-card h3 {
  font-size: 1.25rem;
  margin-bottom: 4px;
}

.kpi-meta {
  color: var(--muted);
  font-size: .8rem;
}

.kpi-card.warning h3 { color: var(--warning); }
.kpi-card.danger h3 { color: var(--danger); }

.dashboard-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.full-width {
  grid-column: 1 / -1;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px;
  box-shadow: var(--shadow);
  margin-bottom: 14px;
}

.card h2 {
  font-size: 1.05rem;
  margin-bottom: 12px;
}

.card-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.alerts-list,
.activity-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.alert-item,
.activity-item {
  background: var(--panel-soft);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
}

.alert-item.warning { border-left: 4px solid var(--warning); }
.alert-item.error { border-left: 4px solid var(--danger); }
.alert-item.info { border-left: 4px solid var(--primary); }

.activity-meta,
.muted {
  color: var(--muted);
  font-size: .85rem;
}

.trend-chart {
  display: flex;
  align-items: end;
  gap: 8px;
  min-height: 160px;
  padding: 10px;
  border-radius: 10px;
  background: var(--panel-soft);
  border: 1px solid var(--border);
}

.trend-col {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: end;
  align-items: center;
  gap: 6px;
}

.trend-bars {
  width: 100%;
  display: flex;
  align-items: end;
  justify-content: center;
  gap: 4px;
  min-height: 110px;
}

.trend-bar {
  width: 9px;
  border-radius: 999px;
}

.trend-bar.keys { background: #4f8cff; }
.trend-bar.activations { background: #20c997; }

.trend-label { font-size: .72rem; color: var(--muted); }

.trend-legend {
  display: flex;
  gap: 16px;
  margin-bottom: 8px;
  font-size: .82rem;
  color: var(--muted);
}

.legend-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  display: inline-block;
  margin-right: 6px;
}

.upload-area {
  border: 1px dashed #5573b9;
  border-radius: 10px;
  padding: 30px 16px;
  text-align: center;
  cursor: pointer;
  background: var(--panel-soft);
  margin-bottom: 16px;
}

.upload-area:hover {
  border-color: #79a1ff;
}

.upload-area svg {
  color: #79a1ff;
  margin-bottom: 8px;
}

.upload-area .sub {
  color: var(--muted);
}

.version-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 10px;
  margin-bottom: 14px;
}

.info-item {
  background: var(--panel-soft);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px;
}

.info-item label {
  display: block;
  color: var(--muted);
  font-size: .75rem;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.value {
  font-weight: 600;
}

.status {
  padding: 3px 10px;
  border-radius: 999px;
  font-size: .75rem;
  font-weight: 700;
}

.status.success {
  background: rgba(32, 201, 151, 0.2);
  color: #72ffd8;
}

.status.error {
  background: rgba(255, 107, 107, 0.2);
  color: #ffb0b0;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.form-group {
  margin-bottom: 12px;
}

.form-group label {
  display: block;
  margin-bottom: 6px;
  font-size: .9rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  border: 1px solid var(--border);
  background: var(--panel-soft);
  color: var(--text);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: .95rem;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
}

.button-group {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.btn {
  border: none;
  border-radius: 10px;
  padding: 10px 14px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.btn-primary {
  background: linear-gradient(135deg, #4f8cff, #2f6cdf);
  color: white;
}

.btn-secondary {
  background: #2a3554;
  color: #d4def9;
  border: 1px solid var(--border);
}

.btn-danger {
  background: linear-gradient(135deg, #ff6b6b, #ef4444);
  color: white;
}

.btn-sm {
  padding: 6px 10px;
  font-size: .82rem;
}

.btn:disabled {
  opacity: .55;
  cursor: not-allowed;
}

.progress {
  background: #212b46;
  border-radius: 999px;
  height: 8px;
  overflow: hidden;
  margin-top: 10px;
}

.progress-bar {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, #4f8cff, #20c997);
}

.file-selected {
  padding: 10px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--panel-soft);
}

.message {
  margin-top: 10px;
  padding: 10px 12px;
  border-radius: 10px;
  display: none;
}

.message.success {
  background: rgba(32, 201, 151, 0.2);
  color: #75f8d3;
}

.message.error {
  background: rgba(255, 107, 107, 0.2);
  color: #ffb7b7;
}

.loading {
  color: var(--muted);
  padding: 14px;
}

.table-wrap {
  overflow-x: auto;
}

.files-table {
  width: 100%;
  border-collapse: collapse;
}

.files-table th,
.files-table td {
  padding: 10px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: .9rem;
  vertical-align: top;
}

.files-table th {
  color: #c0cbed;
  font-weight: 700;
}

.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 16px 0;
}

.overlay {
  position: fixed;
  inset: 0;
  background: rgba(2, 6, 14, .65);
  display: none; /* Changed to none for initial load */
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 18px;
}

.overlay-card {
  width: min(520px, 95vw);
  background: #101833;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px;
  box-shadow: var(--shadow);
}

footer {
  text-align: center;
  color: var(--muted);
  margin-top: 20px;
}

@media (max-width: 1050px) {
  .kpi-grid {
    grid-template-columns: repeat(3, minmax(140px, 1fr));
  }
  .dashboard-grid {
    grid-template-columns: 1fr;
  }
  .form-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  body {
    padding: 12px;
  }
  .topbar {
    flex-direction: column;
    align-items: flex-start;
  }
  .tabs {
    overflow-x: auto;
  }
  .kpi-grid {
    grid-template-columns: repeat(2, minmax(120px, 1fr));
  }
  .button-group {
    flex-direction: column;
  }
  .btn {
    width: 100%;
  }
}