/* ── Reset & base ── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg: #0a0a0a;
  --win-bg: #3a3a3a;
  --win-border: #1a1a1a;
  --win-title: #2e2e2e;
  --win-title-active: #4a4a4a;
  --text: #c8c8c8;
  --term-green: #33ff66;
  --term-dim: #6fcf8a;
  --accent: #6a8fcf;
  --shadow: 2px 2px 6px rgba(0,0,0,0.6);
  --font-mono: 'IBM Plex Mono', 'DejaVu Sans Mono', 'Liberation Mono', 'Ubuntu Mono', Consolas, monospace;
  --font-ui: 'DejaVu Sans', 'Liberation Sans', 'Lucida Grande', system-ui, sans-serif;
  --font-ui-size: 12px;
  --font-mono-sm: 11px;
  --font-mono-xs: 10px;
  --transition: 0.15s ease;
}

@media (prefers-reduced-motion: reduce) {
  :root { --transition: 0s; }
  .sha-dot { animation: none !important; }
  .win { transition: none !important; }
}

html, body {
  background: var(--bg);
  overflow: hidden;
  width: 100vw;
  height: 100vh;
  font-family: var(--font-ui);
  font-size: var(--font-ui-size);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* Crisp monospace for all terminal-style UI */
.desktop,
.hash-dock,
.win-body,
.vm-screen,
.vm-screen div,
.vm-screen span,
.sha-panel,
.qubit-panel {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: geometricPrecision;
  font-feature-settings: 'liga' 0;
}

/* ── Game of Life background ── */
#canvas {
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  position: fixed;
  inset: 0;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1.2;
  z-index: 0;
  pointer-events: auto;
  cursor: default;
}

.cell {
  position: absolute;
  opacity: 0;
}

/* ── Desktop layer ── */
.desktop {
  position: fixed;
  inset: 0;
  z-index: 10;
  pointer-events: none;
}

.desktop > .win {
  pointer-events: auto;
}

/* ── Hash monitor dock ── */
.hash-dock {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 200;
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
  padding: 2px;
  background: linear-gradient(to top, rgba(0,0,0,0.85), rgba(0,0,0,0.4));
  pointer-events: auto;
  max-height: 45vh;
  overflow-y: auto;
}

.hash-dock .win {
  position: relative !important;
  left: auto !important;
  top: auto !important;
  flex: 1 1 130px;
  min-width: 124px;
  max-width: 220px;
  height: 148px !important;
  box-shadow: var(--shadow);
}

/* ── Window chrome (GTK2 / Motif) ── */
.win {
  position: absolute;
  display: flex;
  flex-direction: column;
  background: var(--win-bg);
  border: 2px solid var(--win-border);
  border-radius: 4px;
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: box-shadow var(--transition), border-color var(--transition);
  outline: none;
}

.win:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.win-focused {
  border-color: #5a7ab0;
  box-shadow: 3px 3px 10px rgba(0,0,0,0.75);
}

.win-minimized {
  height: 28px !important;
  min-height: 28px !important;
  overflow: hidden;
}

.win-minimized .win-body { display: none; }

.win-titlebar {
  display: flex;
  align-items: center;
  gap: 6px;
  height: 26px;
  padding: 0 4px 0 8px;
  background: linear-gradient(180deg, #555 0%, var(--win-title) 40%, #2a2a2a 100%);
  border-bottom: 1px solid #111;
  cursor: default;
  user-select: none;
  flex-shrink: 0;
}

.win-focused .win-titlebar {
  background: linear-gradient(180deg, #6a7a9a 0%, var(--win-title-active) 40%, #3a3a4a 100%);
}

.win-icon {
  font-size: 11px;
  width: 14px;
  text-align: center;
  flex-shrink: 0;
}

.win-title {
  flex: 1;
  font-family: var(--font-ui);
  font-size: var(--font-ui-size);
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: #e8e8e8;
  text-shadow: none;
  letter-spacing: 0.01em;
}

.win-controls {
  display: flex;
  gap: 2px;
  flex-shrink: 0;
}

.win-btn {
  width: 18px;
  height: 18px;
  border: 1px solid #222;
  border-radius: 2px;
  background: linear-gradient(180deg, #666, #444);
  color: #eee;
  font-size: 11px;
  line-height: 1;
  cursor: pointer;
  padding: 0;
  font-family: var(--font-ui);
}

.win-btn:hover { background: linear-gradient(180deg, #777, #555); }
.win-btn:focus-visible { outline: 1px solid var(--accent); }

.win-btn-close:hover {
  background: linear-gradient(180deg, #c44, #822);
}

.win-body {
  flex: 1;
  overflow: hidden;
  position: relative;
  background: #1e1e1e;
}

/* ── Resize handles ── */
.win-resize {
  position: absolute;
  z-index: 5;
}
.win-resize-n  { top: -3px; left: 8px; right: 8px; height: 6px; cursor: n-resize; }
.win-resize-s  { bottom: -3px; left: 8px; right: 8px; height: 6px; cursor: s-resize; }
.win-resize-e  { right: -3px; top: 8px; bottom: 8px; width: 6px; cursor: e-resize; }
.win-resize-w  { left: -3px; top: 8px; bottom: 8px; width: 6px; cursor: w-resize; }
.win-resize-ne { top: -3px; right: -3px; width: 10px; height: 10px; cursor: ne-resize; }
.win-resize-nw { top: -3px; left: -3px; width: 10px; height: 10px; cursor: nw-resize; }
.win-resize-se { bottom: -3px; right: -3px; width: 10px; height: 10px; cursor: se-resize; }
.win-resize-sw { bottom: -3px; left: -3px; width: 10px; height: 10px; cursor: sw-resize; }

body.wm-dragging {
  user-select: none;
  cursor: grabbing;
}

/* ── VM window ── */
.win-vm .win-body { background: #000; }

.vm-shell {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.vm-area {
  flex: 1;
  overflow: hidden;
  position: relative;
}

.vm-screen-wrap {
  width: 100%;
  height: 100%;
  min-height: 160px;
  outline: none;
  background: #000;
  position: absolute;
  inset: 0;
}

.vm-screen-wrap:focus-visible {
  outline: 2px solid var(--term-green);
  outline-offset: -2px;
}

.vm-screen {
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: var(--font-mono) !important;
  font-size: 12px !important;
  line-height: 14px !important;
  letter-spacing: 0;
}

/* v86 VGA text layer (div/span terminal) */
.vm-screen > div {
  font: 12px/14px var(--font-mono) !important;
  white-space: pre !important;
  color: #e8e8e8;
  padding: 2px 4px;
}

.vm-screen span {
  font: inherit !important;
}

.vm-screen canvas {
  width: 100% !important;
  height: 100% !important;
  image-rendering: auto;
}

.vm-status {
  height: 20px;
  padding: 0 8px;
  font-family: var(--font-mono);
  font-size: var(--font-mono-xs);
  font-weight: 400;
  color: var(--term-green);
  background: #0a0a0a;
  border-top: 1px solid #222;
  line-height: 20px;
}

.vm-progress {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: rgba(0,0,0,0.92);
  z-index: 10;
  transition: opacity 0.4s;
}

.vm-progress-hidden {
  opacity: 0;
  pointer-events: none;
}

.vm-progress-label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--term-green);
}

.vm-progress-bar {
  width: 70%;
  height: 6px;
  background: #222;
  border: 1px solid #444;
  border-radius: 2px;
  overflow: hidden;
}

.vm-progress-fill {
  height: 100%;
  width: 0%;
  background: var(--term-green);
  transition: width 0.2s;
}

.vm-error {
  color: #f66;
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 12px;
  text-align: center;
}

/* ── SHA monitor panels ── */
.win-sha .win-body { background: #2a2a2a; padding: 0; }
.win-sha .win-titlebar { height: 24px; }
.win-sha .win-title { font-size: var(--font-mono-xs); }

.sha-content { height: 100%; }

.sha-panel {
  padding: 4px 6px;
  font-family: var(--font-mono);
  font-size: var(--font-mono-sm);
  font-weight: 400;
  line-height: 1.55;
  height: 100%;
  overflow: hidden;
}

.sha-row {
  display: flex;
  justify-content: space-between;
  gap: 4px;
}

.sha-key {
  color: #888;
  flex-shrink: 0;
}

.sha-val {
  color: var(--term-green);
  text-align: right;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sha-hash { font-size: var(--font-mono-xs); color: var(--term-dim); font-weight: 400; }

.sha-activity {
  display: flex;
  gap: 3px;
  margin-top: 2px;
  justify-content: flex-end;
}

.sha-dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: #333;
  animation: sha-pulse 1.2s ease-in-out infinite;
}

.sha-dot:nth-child(2) { animation-delay: 0.2s; }
.sha-dot:nth-child(3) { animation-delay: 0.4s; }

.sha-active .sha-dot { background: var(--term-green); }

@keyframes sha-pulse {
  0%, 100% { opacity: 0.3; transform: scale(0.8); }
  50% { opacity: 1; transform: scale(1.2); }
}

.mono { font-family: var(--font-mono); }

/* ── Qubit simulator ── */
.win-qubit .win-body { background: #1a1a1a; padding: 0; }

.qubit-panel {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto auto;
  gap: 5px 8px;
  padding: 8px;
  font-family: var(--font-mono);
  font-size: var(--font-mono-sm);
  font-weight: 400;
  color: var(--term-green);
  height: 100%;
}

.qubit-state { grid-column: 1; grid-row: 1 / 3; line-height: 1.6; }
.qubit-ket { word-break: break-all; font-weight: 600; }
.qubit-sphere {
  grid-column: 2;
  grid-row: 1 / 3;
  align-self: center;
  width: 80px;
  height: 80px;
  background: #0a0a0a;
  border: 1px solid #333;
  border-radius: 50%;
}
.qubit-gates {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  gap: 3px;
}
.qubit-gates button {
  min-width: 26px;
  height: 22px;
  padding: 0 5px;
  font-family: var(--font-mono);
  font-size: var(--font-mono-sm);
  font-weight: 600;
  background: #2a2a2a;
  color: var(--term-green);
  border: 1px solid #444;
  border-radius: 2px;
  cursor: pointer;
}
.qubit-gates button:hover { background: #3a3a3a; }
.qubit-gates button:focus-visible { outline: 1px solid var(--accent); }
.qubit-meas { grid-column: 1 / -1; font-size: var(--font-mono-xs); color: #999; }
.qubit-circuit { grid-column: 1 / -1; font-size: var(--font-mono-xs); color: #6a8f6a; word-break: break-all; }
.qubit-angles { font-size: var(--font-mono-xs); color: #6fcf8a; }
.qubit-backend { font-size: var(--font-mono-xs); color: #557755; }
.qubit-meta { font-size: var(--font-mono-xs); color: #6a8f6a; }
.qubit-meas-hidden { visibility: hidden; }
.qubit-error { padding: 8px; color: #f66; }

/* ── Responsive ── */
@media (max-width: 900px) {
  .hash-dock .win {
    flex: 1 1 112px;
    min-width: 108px;
    height: 136px !important;
  }

  .sha-panel { font-size: var(--font-mono-xs); }
}

@media (max-width: 600px) {
  .hash-dock .win {
    flex: 1 1 46%;
    max-width: none;
  }
}