/* === RETRO TERMINAL THEME === */
:root {
  --bg: #0a0a0a;
  --bg-2: #050505;
  --green: #00ff41;
  --green-dim: #008f11;
  --green-faint: #5a8a5a;
  --border: #1a1a1a;
  --border-2: #2a2a2a;
  --glow: 0 0 8px #00ff41;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--green);
  font-family: 'Courier New', 'Monaco', monospace;
  font-size: 14px;
  min-height: 100vh;
  overflow-x: hidden;
}

.dim { color: var(--green-faint); }
.small { font-size: 11px; }
.mono { font-family: 'Courier New', 'Monaco', monospace; }

/* CRT scanlines */
.scanlines {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    to bottom,
    rgba(0, 255, 65, 0.03) 0px,
    rgba(0, 255, 65, 0.03) 1px,
    transparent 1px,
    transparent 3px
  );
  z-index: 9999;
}
.scanlines.off { display: none; }

/* Header */
.boot-header {
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-2);
}
.boot-header h1 {
  margin: 0;
  font-size: 18px;
  font-weight: normal;
  text-shadow: var(--glow);
  letter-spacing: 1px;
}
.cursor {
  display: inline-block;
  animation: blink 1s steps(2) infinite;
}
@keyframes blink {
  0%, 50% { opacity: 1; }
  50.01%, 100% { opacity: 0; }
}

/* Layout */
.layout {
  display: grid;
  grid-template-columns: 35% 65%;
  gap: 0;
  min-height: calc(100vh - 60px);
}

.panel {
  padding: 20px;
  overflow-y: auto;
}
.left-panel {
  border-right: 1px solid var(--border);
  background: var(--bg-2);
}
.right-panel {
  display: flex;
  flex-direction: column;
}

/* Control groups */
.control-group {
  margin-bottom: 22px;
  padding-bottom: 16px;
  border-bottom: 1px dashed var(--border-2);
}
.control-group:last-child { border-bottom: none; }

.group-title {
  display: block;
  font-size: 12px;
  color: var(--green-dim);
  margin-bottom: 10px;
  letter-spacing: 1px;
  text-shadow: 0 0 4px var(--green-dim);
}

/* Inputs */
.input, select, input[type="text"] {
  width: 100%;
  background: var(--bg);
  color: var(--green);
  border: 1px solid var(--green-dim);
  padding: 8px 10px;
  font-family: inherit;
  font-size: 13px;
  margin-bottom: 8px;
  outline: none;
}
.input:focus { border-color: var(--green); box-shadow: var(--glow); }

/* Buttons */
.btn {
  background: transparent;
  color: var(--green);
  border: 1px solid var(--green);
  padding: 8px 14px;
  font-family: inherit;
  font-size: 12px;
  cursor: pointer;
  letter-spacing: 1px;
  transition: all 0.15s;
}
.btn:hover:not(:disabled) {
  background: rgba(0, 255, 65, 0.1);
  box-shadow: var(--glow);
  text-shadow: var(--glow);
}
.btn:disabled {
  color: var(--green-dim);
  border-color: var(--green-dim);
  cursor: not-allowed;
  opacity: 0.5;
}

.btn-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.btn-row .btn { flex: 1; min-width: 90px; }

/* Dropzone */
.dropzone {
  border: 1px dashed var(--green-dim);
  padding: 20px;
  text-align: center;
  margin-bottom: 10px;
  transition: all 0.15s;
}
.dropzone.dragover {
  border-color: var(--green);
  background: rgba(0, 255, 65, 0.05);
  box-shadow: var(--glow) inset;
}
.dropzone p { margin: 6px 0; }

.preview-wrap {
  margin-top: 10px;
  border: 1px solid var(--border-2);
  padding: 4px;
  text-align: center;
}
.preview-wrap img {
  max-width: 100%;
  max-height: 120px;
  display: block;
  margin: 0 auto;
  filter: brightness(0.9);
}

/* Sliders */
.slider-row {
  margin-bottom: 12px;
}
.slider-row label {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  margin-bottom: 4px;
  color: var(--green);
}
.val { color: var(--green); text-shadow: 0 0 4px var(--green); }

input[type="range"] {
  width: 100%;
  -webkit-appearance: none;
  appearance: none;
  height: 4px;
  background: var(--border-2);
  outline: none;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  background: var(--green);
  border: 1px solid var(--green);
  cursor: pointer;
  box-shadow: var(--glow);
}
input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  background: var(--green);
  border: 1px solid var(--green);
  cursor: pointer;
}

/* Toggle row */
.toggle-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 4px;
}
.toggle-row label {
  font-size: 12px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.toggle-row input[type="checkbox"] {
  accent-color: var(--green);
}

/* Output */
.output-header {
  display: flex;
  justify-content: space-between;
  padding: 4px 8px;
  margin-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.ascii-output {
  flex: 1;
  margin: 0;
  padding: 12px;
  background: #000;
  color: var(--green);
  font-family: 'Courier New', 'Monaco', monospace;
  font-size: 9px;
  line-height: 1.0;
  letter-spacing: 0;
  white-space: pre;
  overflow: auto;
  border: 1px solid var(--border);
  resize: both;
  min-height: 400px;
}

.status {
  margin: 6px 0 0 0;
  min-height: 14px;
}
.status.ok { color: var(--green); }
.status.err { color: #ff4141; text-shadow: 0 0 4px #ff4141; }

/* Mobile */
@media (max-width: 768px) {
  .layout {
    grid-template-columns: 1fr;
  }
  .left-panel {
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
  .ascii-output { font-size: 7px; }
}