/* ── Fundamental Zone module styles ── */

/* ── App layout (single canvas + side panel) ── */
.app {
  display: flex;
  flex-direction: row;
  height: calc(100vh - 38px);
  overflow: hidden;
  gap: 0;
}

/* ── Display panel ── */
.display-panel {
  flex: 1 1 0;
  min-width: 0;
  display: flex;
  flex-direction: column;
  padding: 14px 16px 10px;
  gap: 8px;
  overflow: hidden;
}

.display-panel h1 {
  font-size: 1.1rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  flex-shrink: 0;
}

/* ── Canvas wrapper ── */
.fz-canvas-wrap {
  flex: 1 1 0;
  min-height: 0;
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  background: #0f0f1a;
  border: 1px solid rgba(108,99,255,0.15);
  box-shadow: 0 8px 32px rgba(0,0,0,0.35);
}

.fz-canvas {
  width: 100%;
  height: 100%;
}

.fz-canvas canvas {
  display: block;
}

.canvas-label {
  font-size: 0.65rem;
  color: var(--text-muted);
  text-align: center;
  flex-shrink: 0;
}

/* ── Control panel ── */
.control-panel {
  width: 260px;
  flex-shrink: 0;
  background: var(--bg-slide);
  border-left: 1px solid rgba(108,99,255,0.12);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  padding: 14px 14px 20px;
  gap: 0;
}

.panel-title {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(108,99,255,0.12);
  margin-bottom: 10px;
}

/* ── Sections ── */
.section {
  padding: 12px 0;
  border-bottom: 1px solid rgba(108,99,255,0.08);
}

.section:last-child {
  border-bottom: none;
}

.section h3 {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--accent-1);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

/* ── Buttons ── */
.fz-btn-row {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 6px;
}

.fz-btn {
  flex: 1;
  padding: 5px 10px;
  border: none;
  border-radius: 6px;
  font-family: 'Inter', sans-serif;
  font-size: 0.7rem;
  font-weight: 600;
  cursor: pointer;
  background: linear-gradient(135deg, var(--accent-1, #6c63ff), var(--accent-2, #e94560));
  color: #fff;
  transition: opacity 0.15s;
  white-space: nowrap;
}

.fz-btn:hover { opacity: 0.85; }
.fz-btn:disabled { opacity: 0.4; cursor: not-allowed; }

.fz-btn-secondary {
  background: rgba(108,99,255,0.2);
  border: 1px solid rgba(108,99,255,0.3);
  color: var(--text-secondary);
}

.fz-btn-secondary:hover {
  background: rgba(108,99,255,0.35);
  opacity: 1;
}

/* ── Sigma / N row ── */
.fz-sigma-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 8px;
}

.fz-sigma-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.fz-sigma-input {
  width: 54px;
  padding: 3px 6px;
  border-radius: 5px;
  border: 1px solid rgba(108,99,255,0.2);
  background: rgba(15,15,26,0.6);
  color: var(--text-primary);
  font-size: 0.7rem;
  text-align: center;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
}

/* ── Info rows ── */
.fz-info-row {
  margin-top: 4px;
}

.fz-info-label {
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.fz-info-value {
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 0.66rem;
  color: var(--text-primary);
  word-break: break-all;
}

/* ── About text ── */
.fz-about {
  font-size: 0.68rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 8px;
}

/* ── Fullscreen ── */
.fz-canvas-wrap:fullscreen {
  width: 100vw !important;
  height: 100vh !important;
  border-radius: 0 !important;
}

.fz-canvas-wrap:fullscreen .fz-canvas canvas {
  width: 100% !important;
  height: 100% !important;
}