/* ==========================================================================
   DSP Frequency Shifter & Live Audio Router v2.5.0 - Theme & Component Styles
   ========================================================================== */

:root[data-theme="light"] {
  --pico-font-size: 100%;
  --accent-green: #1a7f37;
  --accent-red: #cf222e;
  --accent-amber: #9a6700;
  --accent-blue: #0969da;
  --panel-bg: #ffffff;
  --border-color: #d0d7de;
  --canvas-bg: #f6f8fa;
  --canvas-grid: #e1e4e8;
  --text-muted: #57606a;
  --tabulator-bg: #ffffff;
  --tabulator-row-even: #f6f8fa;
}

:root[data-theme="dark"] {
  --pico-font-size: 100%;
  --accent-green: #2ecc71;
  --accent-red: #e74c3c;
  --accent-amber: #f39c12;
  --accent-blue: #38bdf8;
  --panel-bg: #161b22;
  --border-color: #30363d;
  --canvas-bg: #05070a;
  --canvas-grid: #21262d;
  --text-muted: #8b949e;
  --tabulator-bg: #161b22;
  --tabulator-row-even: #0d1117;
}

body {
  padding-bottom: 3.5rem;
  user-select: none;
  -webkit-user-select: none;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.app-header {
  margin-top: 1rem;
  margin-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
}

.badge-indicator {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.28rem 0.7rem;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  white-space: nowrap;
}
.badge-green {
  background-color: rgba(46, 204, 113, 0.18);
  color: var(--accent-green);
  border: 1px solid var(--accent-green);
}
.badge-red {
  background-color: rgba(231, 76, 60, 0.18);
  color: var(--accent-red);
  border: 1px solid var(--accent-red);
}
.badge-amber {
  background-color: rgba(243, 156, 18, 0.18);
  color: var(--accent-amber);
  border: 1px solid var(--accent-amber);
}

.pulse-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: currentColor;
  box-shadow: 0 0 8px currentColor;
  animation: pulseAnim 1.4s infinite ease-in-out;
}
@keyframes pulseAnim {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

button, select, input[type="file"], input[type="range"] {
  min-height: 48px;
  font-size: 1rem;
  touch-action: manipulation;
}

.control-btn-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 0.65rem;
  margin-bottom: 1.25rem;
}

.btn-start {
  background-color: #1a7f37 !important;
  border-color: #1a7f37 !important;
  color: #ffffff;
  font-weight: bold;
}
:root[data-theme="dark"] .btn-start {
  background-color: #238636 !important;
  border-color: #2ea043 !important;
}

.btn-pause {
  background-color: #b08800 !important;
  border-color: #b08800 !important;
  color: #ffffff;
  font-weight: bold;
}
.btn-stop {
  background-color: #cf222e !important;
  border-color: #cf222e !important;
  color: #ffffff;
  font-weight: bold;
}
:root[data-theme="dark"] .btn-stop {
  background-color: #da3633 !important;
  border-color: #f85149 !important;
}

article.dsp-card {
  background-color: var(--panel-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.25rem;
  margin-bottom: 1.5rem;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.section-title {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
}

.visualizer-wrapper {
  position: relative;
  width: 100%;
  height: 120px;
  background-color: var(--canvas-bg);
  border-radius: 6px;
  border: 1px solid var(--border-color);
  overflow: hidden;
  margin-top: 0.75rem;
}

.visualizer-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: block;
}

.visualizer-legend {
  display: flex;
  gap: 1rem;
  font-size: 0.8rem;
  margin-top: 0.4rem;
  flex-wrap: wrap;
}
.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-weight: 600;
}
.legend-color-box {
  width: 12px;
  height: 12px;
  border-radius: 2px;
}

#diagnostics-table-container {
  font-size: 0.85rem;
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  min-height: 180px;
}

.tabulator {
  background-color: var(--tabulator-bg) !important;
  border: none !important;
  color: inherit !important;
}
.tabulator .tabulator-header {
  background-color: var(--panel-bg) !important;
  border-bottom: 1px solid var(--border-color) !important;
  color: inherit !important;
}
.tabulator .tabulator-row {
  background-color: var(--tabulator-bg) !important;
  color: inherit !important;
  border-bottom: 1px solid var(--border-color) !important;
}
.tabulator .tabulator-row:nth-child(even) {
  background-color: var(--tabulator-row-even) !important;
}

.feedback-warning {
  font-size: 0.85rem;
  color: var(--accent-amber);
  background: rgba(243, 156, 18, 0.1);
  padding: 0.6rem;
  border-radius: 6px;
  border-left: 4px solid var(--accent-amber);
  margin-top: 0.5rem;
  margin-bottom: 0.5rem;
}

.fallback-banner {
  background: rgba(231, 76, 60, 0.1);
  border: 1px solid var(--accent-red);
  padding: 0.85rem 1rem;
  border-radius: 6px;
  margin-top: 0.75rem;
  font-size: 0.88rem;
}

.instructions-card {
  background: rgba(0, 0, 0, 0.05);
  padding: 0.5rem 0.75rem;
  border-radius: 4px;
  margin: 0.5rem 0;
  font-size: 0.82rem;
  line-height: 1.4;
}
:root[data-theme="dark"] .instructions-card {
  background: rgba(255, 255, 255, 0.05);
}

.quick-offset-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(70px, 1fr));
  gap: 0.4rem;
  margin-top: 0.5rem;
}
.quick-offset-grid button {
  min-height: 40px;
  font-size: 0.85rem;
  padding: 0.2rem;
}

@media (max-width: 576px) {
  .control-btn-grid {
    grid-template-columns: 1fr;
  }
  .section-title {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.4rem;
  }
}