:root {
  --bg-dark: #070a0e;
  --bg-card: #0d1219;
  --bg-card-border: #16202d;
  --accent-green: #00ff66;
  --accent-green-dim: rgba(0, 255, 102, 0.15);
  --accent-amber: #ffb300;
  --accent-amber-dim: rgba(255, 179, 0, 0.15);
  --accent-orange: #ff5500;
  --accent-cyan: #00e5ff;
  --text-primary: #e6f1ff;
  --text-muted: #8295a8;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

body {
  background-color: var(--bg-dark);
  color: var(--text-primary);
  font-family: var(--font-sans);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* CRT Scanline & Grid Effect Overlay */
body::before {
  content: " ";
  display: block;
  position: fixed;
  top: 0; left: 0; bottom: 0; right: 0;
  background: linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.25) 50%), linear-gradient(90deg, rgba(255, 0, 0, 0.03), rgba(0, 255, 0, 0.01), rgba(0, 0, 255, 0.03));
  z-index: 9999;
  background-size: 100% 3px, 6px 100%;
  pointer-events: none;
  opacity: 0.6;
}

header {
  background: #0a0f16;
  border-bottom: 2px solid var(--accent-orange);
  padding: 12px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
}

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

.brand-icon {
  font-size: 24px;
  animation: pulse 2s infinite;
}

.brand-title {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: 1.5px;
  color: var(--accent-green);
  text-shadow: 0 0 10px rgba(0, 255, 102, 0.4);
}

.brand-subtitle {
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.5px;
}

.nav-tabs {
  display: flex;
  gap: 8px;
}

.tab-btn {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid transparent;
  border-radius: 4px;
  padding: 8px 16px;
  font-size: 0.85rem;
  font-family: var(--font-mono);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.tab-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--bg-card-border);
}

.tab-btn.active {
  color: var(--accent-green);
  background: var(--accent-green-dim);
  border-color: var(--accent-green);
  box-shadow: 0 0 8px rgba(0, 255, 102, 0.2);
}

.header-status {
  display: flex;
  align-items: center;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.status-pill {
  padding: 4px 10px;
  border-radius: 20px;
  background: #111a24;
  border: 1px solid var(--bg-card-border);
  display: flex;
  align-items: center;
  gap: 6px;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #555;
}

.status-dot.active {
  background: var(--accent-green);
  box-shadow: 0 0 8px var(--accent-green);
}

main {
  flex: 1;
  padding: 20px 24px;
  max-width: 1600px;
  width: 100%;
  margin: 0 auto;
}

.tab-content {
  display: none;
}

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

/* Control Bar */
.control-bar {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: 6px;
  padding: 14px 18px;
  margin-bottom: 20px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.stream-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
}

.select-source, .input-custom {
  background: #06090e;
  border: 1px solid var(--bg-card-border);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 8px 12px;
  border-radius: 4px;
}

.select-source:focus, .input-custom:focus {
  outline: none;
  border-color: var(--accent-green);
}

.btn {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: 4px;
  cursor: pointer;
  border: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s ease;
}

.btn-primary {
  background: var(--accent-green);
  color: #000;
}

.btn-primary:hover {
  background: #00cc52;
  box-shadow: 0 0 10px rgba(0, 255, 102, 0.4);
}

.btn-danger {
  background: #e74c3c;
  color: #fff;
}

.btn-secondary {
  background: #1c2736;
  color: var(--text-primary);
  border: 1px solid var(--bg-card-border);
}

.btn-secondary:hover {
  background: #253347;
}

.audio-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.volume-slider {
  accent-color: var(--accent-green);
  cursor: pointer;
}

/* Dashboard Grid */
.grid-panels {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}

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

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

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--bg-card-border);
  padding-bottom: 8px;
}

.panel-title {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--accent-amber);
  display: flex;
  align-items: center;
  gap: 8px;
}

.canvas-container {
  width: 100%;
  height: 260px;
  position: relative;
  background: #000;
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid #16202d;
}

canvas {
  width: 100%;
  height: 100%;
  display: block;
}

/* FSK State Indicator */
.fsk-indicator-box {
  background: #080c12;
  border: 1px solid var(--bg-card-border);
  border-radius: 6px;
  padding: 16px;
  margin-bottom: 16px;
  text-align: center;
}

.fsk-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 900;
  padding: 10px 20px;
  border-radius: 6px;
  margin-bottom: 10px;
  letter-spacing: 2px;
  transition: all 0.2s;
}

.fsk-badge.fsk-0 {
  background: rgba(0, 229, 255, 0.2);
  color: var(--accent-cyan);
  border: 1px solid var(--accent-cyan);
  text-shadow: 0 0 10px var(--accent-cyan);
}

.fsk-badge.fsk-1 {
  background: rgba(0, 255, 102, 0.2);
  color: var(--accent-green);
  border: 1px solid var(--accent-green);
  text-shadow: 0 0 10px var(--accent-green);
}

.fsk-badge.fsk-carrier {
  background: rgba(255, 179, 0, 0.2);
  color: var(--accent-amber);
  border: 1px solid var(--accent-amber);
  text-shadow: 0 0 10px var(--accent-amber);
}

.fsk-badge.fsk-idle {
  background: #111a24;
  color: #6a7c8e;
  border: 1px solid #233142;
}

.fsk-badge.fsk-receiving {
  background: rgba(0, 150, 255, 0.15);
  color: #38bdf8;
  border: 1px solid #38bdf8;
  text-shadow: 0 0 10px rgba(56, 189, 248, 0.6);
  font-size: 1.15rem;
}

.fsk-metrics {
  display: flex;
  justify-content: space-around;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.fsk-metrics span {
  color: var(--text-primary);
  font-weight: bold;
}

/* Decoded stream displays */
.stream-box {
  background: #04070a;
  border: 1px solid #141c26;
  border-radius: 4px;
  padding: 12px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--accent-green);
  min-height: 70px;
  max-height: 140px;
  overflow-y: auto;
  word-break: break-all;
  margin-bottom: 12px;
}

.stream-box.hex {
  color: var(--accent-cyan);
}

.stream-box.ascii {
  color: #fff;
  font-size: 0.95rem;
}

/* Alert banner for detected Monolit */
.monolit-alert {
  background: rgba(255, 85, 0, 0.15);
  border: 1px solid var(--accent-orange);
  border-radius: 4px;
  padding: 10px 14px;
  color: #ff9d66;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  display: none;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

/* Export row */
.export-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 10px;
}

/* Logs search and table */
.logs-controls {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.search-input {
  flex: 1;
  min-width: 250px;
  background: #080d14;
  border: 1px solid var(--bg-card-border);
  color: #fff;
  font-family: var(--font-mono);
  padding: 10px 14px;
  border-radius: 4px;
}

.table-wrapper {
  overflow-x: auto;
  max-height: 700px;
  border: 1px solid var(--bg-card-border);
  border-radius: 6px;
}

.logs-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-align: left;
}

.logs-table th {
  background: #0f1722;
  color: var(--accent-amber);
  padding: 12px 14px;
  border-bottom: 2px solid var(--bg-card-border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.logs-table td {
  padding: 10px 14px;
  border-bottom: 1px solid #141d2a;
}

.logs-table tr:hover {
  background: rgba(0, 255, 102, 0.03);
}

.logs-table a {
  color: var(--accent-cyan);
  text-decoration: none;
}

.logs-table a:hover {
  text-decoration: underline;
}

@keyframes pulse {
  0% { opacity: 0.6; }
  50% { opacity: 1; }
  100% { opacity: 0.6; }
}

/* Spectrogram controls */
.wf-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.wf-select {
  background: #0b121a;
  color: var(--text-primary);
  border: 1px solid var(--bg-card-border);
  border-radius: 4px;
  padding: 3px 6px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.wf-check { display: flex; align-items: center; gap: 4px; cursor: pointer; }
.wf-range { width: 90px; }
.wf-range-value { min-width: 92px; color: var(--accent-amber); }
.wf-btn { padding: 3px 10px; font-size: 0.72rem; }
.wf-info { margin-left: 8px; font-weight: 400; color: var(--text-muted); font-size: 0.7rem; }
.wf-cursor { height: 16px; font-family: var(--font-mono); font-size: 0.72rem; color: var(--accent-cyan); }
#waterfallCanvas { image-rendering: auto; }