:root {
  --bg-black: #000000;
  --card-bg: #09090b;
  --card-border: #18181b;
  --card-border-hover: #27272a;
  --text-primary: #f4f4f5;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  --accent-yellow: #ffcc00;
  --accent-yellow-dim: rgba(255, 204, 0, 0.12);
  --accent-green: #22c55e;
  --accent-red: #ef4444;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

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

body {
  background-color: var(--bg-black);
  color: var(--text-primary);
  font-family: var(--font-sans);
  min-height: 100vh;
  padding: 32px 24px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.app-container {
  max-width: 1160px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* Header */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  padding-bottom: 8px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.logo-mark {
  background: var(--accent-yellow);
  color: #000;
  font-weight: 800;
  font-size: 0.85rem;
  padding: 6px 10px;
  border-radius: 6px;
  letter-spacing: 0.5px;
}

.header h1 {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.subtitle {
  color: var(--text-muted);
  font-size: 0.825rem;
}

.subtitle a {
  color: var(--text-secondary);
  text-decoration: none;
}

.subtitle a:hover {
  color: var(--accent-yellow);
}

.header-actions {
  display: flex;
  gap: 10px;
}

/* Minimal Card Utility */
.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 20px;
  transition: border-color 0.2s ease;
}

.card:hover {
  border-color: var(--card-border-hover);
}

/* Metrics Grid */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

@media (max-width: 900px) {
  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.metric-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.metric-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.metric-value {
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-primary);
}

.metric-value .unit {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
}

.highlight-green {
  color: #22c55e !important;
}

.metric-value.highlight {
  color: var(--accent-yellow);
}

.metric-sub {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Plan Banner */
.plan-banner {
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: #0d0d11;
  border-color: #1f1f26;
}

.banner-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.banner-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
}

.banner-desc {
  font-size: 0.825rem;
  color: var(--text-muted);
}

.banner-badge {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 4px 10px;
  border-radius: 6px;
  background: var(--accent-yellow-dim);
  color: var(--accent-yellow);
  border: 1px solid rgba(255, 204, 0, 0.2);
}

.progress-bar-wrap {
  height: 4px;
  background: #18181b;
  border-radius: 2px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--accent-yellow);
  border-radius: 2px;
  width: 100%;
  transition: width 0.3s ease;
}

/* Main Grid */
.main-grid {
  display: grid;
  grid-template-columns: 2.2fr 1fr;
  gap: 16px;
}

@media (max-width: 860px) {
  .main-grid {
    grid-template-columns: 1fr;
  }
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.card-header h2 {
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.chart-tag, .count-tag {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.chart-wrapper {
  position: relative;
  height: 280px;
  width: 100%;
}

/* Controls & Form */
.settings-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 20px;
}

.segmented-control {
  display: flex;
  background: #121215;
  padding: 3px;
  border-radius: 8px;
  border: 1px solid var(--card-border);
}

.segment-btn {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.segment-btn.active {
  background: #202026;
  color: var(--text-primary);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 0.775rem;
  color: var(--text-muted);
}

.input-element {
  width: 100%;
  padding: 9px 12px;
  background: #121215;
  border: 1px solid var(--card-border);
  border-radius: 6px;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  outline: none;
  transition: border-color 0.2s ease;
}

.input-element:focus {
  border-color: #3f3f46;
}

.input-element.mono {
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: nowrap;
}

.select-month {
  height: 38px;
  width: 150px;
  padding: 0 12px;
  background: #121215;
  border: 1px solid var(--card-border);
  border-radius: 6px;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.825rem;
  outline: none;
  cursor: pointer;
}

/* Buttons */
.btn {
  font-family: var(--font-sans);
  font-size: 0.825rem;
  font-weight: 500;
  height: 38px;
  padding: 0 14px;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s ease;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-xs {
  height: 26px;
  padding: 0 10px;
  font-size: 0.75rem;
  border-radius: 4px;
}

.pagination-footer {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 12px;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--card-border);
}

.page-indicator {
  font-size: 0.775rem;
  color: var(--text-muted);
}

.btn-primary {
  background: var(--accent-yellow);
  color: #000;
  font-weight: 600;
}

.btn-primary:hover {
  background: #e6b800;
}

.btn-secondary {
  background: #1c1c21;
  color: var(--text-primary);
}

.btn-secondary:hover {
  background: #27272a;
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--card-border);
  color: var(--text-secondary);
}

.btn-outline:hover {
  border-color: #3f3f46;
  color: var(--text-primary);
}

.full-width {
  width: 100%;
}

.status-indicator {
  width: 6px;
  height: 6px;
  background: var(--accent-green);
  border-radius: 50%;
}

.stats-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-top: 14px;
  border-top: 1px solid var(--card-border);
  font-size: 0.825rem;
}

.stat-row {
  display: flex;
  justify-content: space-between;
  color: var(--text-muted);
}

.stat-row strong {
  color: var(--text-primary);
}

/* Minimal Table */
.table-container {
  overflow-x: auto;
}

.minimal-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.85rem;
}

.minimal-table th {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.775rem;
  padding: 10px 14px;
  border-bottom: 1px solid var(--card-border);
}

.minimal-table td {
  padding: 12px 14px;
  border-bottom: 1px solid #121215;
}

.type-pill {
  display: inline-block;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.725rem;
  font-weight: 500;
}

.type-pill.regular {
  background: #18181b;
  color: var(--text-secondary);
}

.type-pill.corrected {
  background: var(--accent-yellow-dim);
  color: var(--accent-yellow);
}

.raw-msg {
  font-family: var(--font-mono);
  font-size: 0.775rem;
  color: var(--text-muted);
  max-width: 480px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Modals */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(4px);
  z-index: 100;
  justify-content: center;
  align-items: center;
  padding: 16px;
}

.modal.active {
  display: flex;
}

.modal-card {
  max-width: 440px;
  width: 100%;
}

/* Fixed Modal Overlay */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.82);
  backdrop-filter: blur(4px);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 9999;
}

.modal-overlay.active {
  display: flex;
}

.modal-box {
  width: 100%;
  max-width: 420px;
  background: #09090b;
  border: 1px solid var(--card-border);
  border-radius: 10px;
  padding: 22px;
  box-shadow: 0 20px 40px rgba(0,0,0,0.8);
}

.close-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.4rem;
  cursor: pointer;
  line-height: 1;
}

.close-btn:hover {
  color: var(--text-primary);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.modal-header h3 {
  font-size: 1rem;
  font-weight: 600;
}

.modal-desc {
  font-size: 0.825rem;
  color: var(--text-secondary);
  margin-bottom: 18px;
  line-height: 1.4;
}

.modal-body .form-group {
  margin-bottom: 16px;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 12px;
  margin-top: 24px;
  padding-top: 14px;
  border-top: 1px solid var(--card-border);
}

/* Responsive Mobile Layout */
@media (max-width: 768px) {
  .app-container {
    padding: 14px 12px;
  }

  .header {
    flex-direction: column;
    align-items: stretch;
    gap: 14px;
  }

  .header-actions {
    flex-wrap: wrap;
    width: 100%;
  }

  .select-month {
    flex: 1 1 100%;
    width: 100%;
  }

  .header-actions .btn {
    flex: 1;
  }

  .metrics-grid {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .main-grid {
    grid-template-columns: 1fr;
  }

  .modal-box {
    width: 92%;
    margin: 0 auto;
    padding: 16px;
  }
}

@media (max-width: 480px) {
  .metrics-grid {
    grid-template-columns: 1fr;
  }
}

/* Upgraded Dashboard Features & Network Detail */
.side-panel-stack {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.chart-header-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.chart-controls {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.time-pills, .type-pills {
  display: inline-flex;
  background: #121215;
  padding: 3px;
  border-radius: 8px;
  border: 1px solid var(--card-border);
}

.pill-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 4px 10px;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.pill-btn:hover {
  color: var(--text-primary);
}

.pill-btn.active {
  background: var(--accent-yellow);
  color: #000;
  box-shadow: 0 0 10px rgba(255, 204, 0, 0.2);
}

.signal-metric-wrap {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.badge-signal {
  font-size: 0.68rem;
  font-weight: 700;
  background: rgba(34, 197, 94, 0.15);
  color: #22c55e;
  padding: 2px 6px;
  border-radius: 4px;
  letter-spacing: 0.5px;
  border: 1px solid rgba(34, 197, 94, 0.3);
}

.badge-pill-green {
  font-size: 0.72rem;
  font-weight: 600;
  color: #22c55e;
  background: rgba(34, 197, 94, 0.12);
  padding: 3px 8px;
  border-radius: 12px;
}

/* Gauges */
.gauge-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 10px;
}

.gauge-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.gauge-label-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--text-secondary);
}

.gauge-label-row strong {
  color: var(--accent-yellow);
  font-family: var(--font-mono);
}

/* 5G Signal & Tower Health Row */
.signal-metrics-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: 14px;
}

@media (max-width: 768px) {
  .signal-metrics-row {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 480px) {
  .signal-metrics-row {
    grid-template-columns: 1fr;
  }
}

.signal-box {
  background: #121215;
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sig-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.sig-val {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent-yellow);
  font-family: var(--font-mono);
}

.gauge-bar {
  width: 100%;
  height: 4px;
  background: #18181b;
  border-radius: 2px;
  overflow: hidden;
}

.gauge-fill {
  height: 100%;
  background: linear-gradient(90deg, #ffcc00, #22c55e);
  border-radius: 2px;
  transition: width 0.4s ease;
}

/* Network Info Grid */
.network-info-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--card-border);
}

@media (max-width: 768px) {
  .network-info-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 480px) {
  .network-info-grid {
    grid-template-columns: 1fr;
  }
}

.info-cell {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.info-label {
  font-size: 0.68rem;
  color: var(--text-muted);
  letter-spacing: 0.5px;
  font-weight: 600;
  text-transform: uppercase;
}

.info-val {
  font-size: 0.825rem;
  color: var(--text-primary);
  font-family: var(--font-mono);
}

/* Privacy Mode Masking */
.sensitive-data.masked {
  filter: blur(5px);
  user-select: none;
  transition: filter 0.2s ease;
}

.btn-privacy-active {
  background: rgba(34, 197, 94, 0.15) !important;
  color: #22c55e !important;
  border-color: #22c55e !important;
}