/* ═══════════════════════════════════════════════════════
   LMAX Disruptor Terminal Sim — Stylesheet
   Terminal / CRT aesthetic with green-on-black palette
════════════════════════════════════════════════════════ */

/* ── Design tokens ───────────────────────────────────── */
:root {
  /* Backgrounds (darkest → lightest) */
  --bg:     #0a0c0a;
  --bg2:    #0f1210;
  --bg3:    #141814;

  /* Borders */
  --border: #1f2b1f;

  /* Brand colours */
  --green:  #39ff14;
  --green2: #22cc00;
  --green3: #0f7a00;
  --green4: #063d00;
  --amber:  #ffb300;
  --red:    #ff3b3b;
  --cyan:   #00e5ff;

  /* Text hierarchy */
  --text:   #c8e6c8;   /* primary */
  --text2:  #7da87d;   /* secondary */
  --text3:  #4a6b4a;   /* muted */

  /* Glow shadows */
  --glow:   0 0 8px  #39ff1440;
  --glow2:  0 0 16px #39ff1466;
  --glow3:  0 0 32px #39ff1488;
}

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

/* ── Base ────────────────────────────────────────────── */
body {
  background: var(--bg);
  color: var(--text);
  font-family: 'JetBrains Mono', 'Share Tech Mono', monospace;
  font-size: 12px;
  line-height: 1.5;
  min-height: 100vh;
  overflow-x: hidden;
}

/* CRT scanline overlay */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.12) 2px,
    rgba(0, 0, 0, 0.12) 4px
  );
  pointer-events: none;
  z-index: 9999;
}

/* CRT vignette */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 60%, rgba(0,0,0,0.7) 100%);
  pointer-events: none;
  z-index: 9998;
}

/* ── Header ──────────────────────────────────────────── */
.header {
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
}

.header-title {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* macOS-style window control dots */
.dot-row { display: flex; gap: 6px; }
.dot      { width: 10px; height: 10px; border-radius: 50%; }
.dot.red  { background: #ff5f57; box-shadow: 0 0 6px #ff5f57aa; }
.dot.amber{ background: #ffbd2e; box-shadow: 0 0 6px #ffbd2eaa; }
.dot.grn  { background: #27c93f; box-shadow: 0 0 6px #27c93faa; }

.title-text {
  font-size: 13px;
  font-weight: 700;
  color: var(--green);
  letter-spacing: 3px;
  text-transform: uppercase;
  text-shadow: var(--glow2);
}

.header-meta {
  display: flex;
  gap: 24px;
  align-items: center;
}

.meta-item {
  font-size: 10px;
  color: var(--text3);
  letter-spacing: 1px;
}

.meta-item span {
  color: var(--green);
  font-weight: 500;
}

/* ── Main layout ─────────────────────────────────────── */
/*
  Two-column grid:
    Left  (1fr)   — ring canvas, spans both rows
    Right (340px) — stats panel (top) + log panel (bottom)
*/
.layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  grid-template-rows: auto 1fr;
  gap: 1px;
  height: calc(100vh - 49px);
  background: var(--border); /* gap colour */
}

.panel {
  background: var(--bg);
  overflow: hidden;
}

/* Section header bar used inside panels */
.panel-header {
  padding: 6px 14px;
  background: var(--bg3);
  border-bottom: 1px solid var(--border);
  font-size: 10px;
  color: var(--text3);
  letter-spacing: 2px;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 8px;
}

.panel-header::before {
  content: '▸';
  color: var(--green);
}

/* ── Ring buffer canvas ──────────────────────────────── */
.ring-panel {
  grid-row: 1 / 3;   /* spans both rows */
  display: flex;
  flex-direction: column;
}

#ringCanvas {
  flex: 1;
  display: block;
  width: 100%;
}

/* ── Stats panel ─────────────────────────────────────── */
.stats-panel {
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--border);
}

/* 2-column grid of stat blocks */
.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  flex: 1;
}

.stat-block {
  background: var(--bg);
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.stat-label {
  font-size: 9px;
  color: var(--text3);
  letter-spacing: 2px;
  text-transform: uppercase;
}

.stat-value {
  font-size: 22px;
  font-weight: 700;
  color: var(--green);
  text-shadow: var(--glow2);
  line-height: 1;
}

/* Colour modifier classes for stat values */
.stat-value.amber { color: var(--amber); text-shadow: 0 0 12px #ffb30066; }
.stat-value.red   { color: var(--red);   text-shadow: 0 0 12px #ff3b3b66; }
.stat-value.cyan  { color: var(--cyan);  text-shadow: 0 0 12px #00e5ff66; }

/* Progress bar beneath a stat */
.stat-bar {
  height: 3px;
  background: var(--bg3);
  border-radius: 2px;
  overflow: hidden;
  margin-top: 4px;
}

.stat-bar-fill {
  height: 100%;
  background: var(--green3);
  border-radius: 2px;
  transition: width 0.3s ease;
  box-shadow: 0 0 6px var(--green3);
}

.stat-bar-fill--cyan {
  background: var(--cyan);
  box-shadow: 0 0 6px var(--cyan);
}

/* ── Controls panel ──────────────────────────────────── */
.controls-panel {
  padding: 10px 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: var(--bg);
}

.control-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.ctrl-label {
  font-size: 10px;
  color: var(--text3);
  letter-spacing: 1px;
  min-width: 90px;
  text-transform: uppercase;
}

/* ── Buttons ─────────────────────────────────────────── */
.btn {
  background: transparent;
  border: 1px solid var(--green3);
  color: var(--green);
  font-family: inherit;
  font-size: 10px;
  letter-spacing: 1px;
  padding: 4px 12px;
  cursor: pointer;
  text-transform: uppercase;
  transition: all 0.15s;
  white-space: nowrap;
}

.btn:hover {
  background: var(--green4);
  border-color: var(--green);
  box-shadow: var(--glow);
}

.btn--active {
  background: var(--green3);
  border-color: var(--green);
  color: #000;
  box-shadow: var(--glow2);
}

.btn--danger {
  border-color: #7a1515;
  color: var(--red);
}

.btn--danger:hover {
  background: #3d0a0a;
  border-color: var(--red);
}

.btn--amber {
  border-color: #7a5200;
  color: var(--amber);
}

.btn--amber:hover {
  background: #3d2900;
  border-color: var(--amber);
}

/* ── Range sliders ───────────────────────────────────── */
input[type=range] {
  -webkit-appearance: none;
  flex: 1;
  height: 3px;
  background: var(--bg3);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}

input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 6px var(--green);
  cursor: pointer;
}

.range-val {
  font-size: 10px;
  color: var(--green);
  min-width: 32px;
  text-align: right;
}

/* ── Pill selector groups (topology, wait strategy, etc.) */
.ws-group {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.ws-pill {
  font-size: 9px;
  padding: 3px 8px;
  border: 1px solid var(--border);
  color: var(--text3);
  cursor: pointer;
  letter-spacing: 0.5px;
  transition: all 0.15s;
  background: transparent;
  font-family: inherit;
  text-transform: uppercase;
}

.ws-pill.sel {
  border-color: var(--amber);
  color: var(--amber);
  background: #3d2900;
}

.ws-pill:hover {
  border-color: var(--text3);
  color: var(--text);
}

/* ── Terminal log panel ──────────────────────────────── */
.log-panel {
  display: flex;
  flex-direction: column;
  background: var(--bg);
}

#logOutput {
  flex: 1;
  overflow-y: auto;
  padding: 8px 14px 14px;
  font-size: 10px;
  line-height: 1.7;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

#logOutput::-webkit-scrollbar       { width: 4px; }
#logOutput::-webkit-scrollbar-thumb { background: var(--border); }

/* One line in the log output */
.log-line {
  display: flex;
  gap: 8px;
  align-items: baseline;
}

.log-ts {
  color: var(--text3);
  min-width: 70px;
}

/* Coloured tag badge (PROD / CONS / SYS / WARN) */
.log-tag {
  padding: 0 5px;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 1px;
  border-radius: 2px;
  min-width: 52px;
  text-align: center;
  display: inline-block;
}

.log-tag.producer { background: var(--green4); color: var(--green); border: 1px solid var(--green3); }
.log-tag.consumer { background: #001f3d;       color: var(--cyan);  border: 1px solid #005577; }
.log-tag.system   { background: #3d2a00;       color: var(--amber); border: 1px solid #7a5200; }
.log-tag.warn     { background: #3d0a0a;       color: var(--red);   border: 1px solid #7a1515; }

/* Log message body — inline colour helpers */
.log-msg        { color: var(--text2); flex: 1; }
.log-msg .hi    { color: var(--text); }
.log-msg .green { color: var(--green); }
.log-msg .cyan  { color: var(--cyan); }
.log-msg .amber { color: var(--amber); }
.log-msg .red   { color: var(--red); }

/* Fake shell prompt at the bottom of the log */
.prompt-line {
  padding: 6px 14px;
  font-size: 10px;
  color: var(--text3);
  border-top: 1px solid var(--border);
}

.prompt-line::before {
  content: '$ ';
  color: var(--green);
}

/* ── Slot colour legend ───────────────────────────────── */
.legend {
  display: flex;
  gap: 14px;
  padding: 6px 14px;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 9px;
  color: var(--text3);
  letter-spacing: 1px;
}

.legend-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

/* ── Animations ──────────────────────────────────────── */
@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

.cursor {
  animation: blink 1s infinite;
  color: var(--green);
}