/**
 * Matrix Modern – UX-optimized styles for matrix calculators
 * Aligned with design-system and three-column tool layout
 */

/* ── Theme variables (per-tool overrides in JSP) ── */
.matrix-calc {
  --mc-accent: var(--tool-primary, #6366f1);
  --mc-accent-muted: rgba(99, 102, 241, 0.12);
  --mc-success-muted: rgba(16, 185, 129, 0.12);
}

/* ── Unified Matrix Theme (all matrix-*.jsp) ── */
.tool-page-container {
  min-height: auto;
  align-items: start;
}

.tool-input-column {
  position: relative;
  top: auto;
  max-height: none;
  overflow: visible;
}

.tool-output-column,
.tool-output-column .tool-card,
#resultArea,
#stepsArea {
  overflow: visible;
  max-height: none;
}

.matrix-calc .tool-card {
  border-radius: 0.75rem;
}

.matrix-calc .tool-card-header {
  padding: 0.75rem 0.9rem;
  font-size: 0.86rem;
}

.matrix-calc .tool-card-body {
  padding: 0.85rem;
}

.matrix-calc .tool-form-group {
  margin-bottom: 0.65rem;
}

.matrix-calc .tool-form-label {
  font-size: 0.78rem;
  margin-bottom: 0.3rem;
}

.matrix-calc .tool-input,
.matrix-calc .tool-select,
.matrix-calc .tool-textarea {
  font-size: 0.82rem;
  padding: 0.45rem 0.65rem;
}

.matrix-calc .tool-form-hint {
  font-size: 0.7rem;
}

.matrix-calc .tool-btn-outline {
  padding: 0.34rem 0.6rem;
  border-radius: 0.5rem;
  font-size: 0.75rem;
}

.matrix-calc .tool-action-btn {
  padding: 0.5rem 0.85rem;
  border-radius: 0.55rem;
  font-size: 0.8rem;
}

.matrix-calc .matrix-display {
  margin: 0.55rem 0;
  padding: 0.6rem;
}

.matrix-calc .result-card {
  margin: 0.55rem 0;
  padding: 1rem;
}

.matrix-calc .step-card {
  padding: 0.7rem 0.9rem;
  margin: 0.45rem 0;
}

.matrix-calc .step-number {
  width: 1.5rem;
  height: 1.5rem;
  font-size: 0.74rem;
}

.matrix-calc .step-description {
  font-size: 0.86rem;
  line-height: 1.55;
}

.matrix-calc .matrix-example-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.matrix-calc .matrix-example-btn {
  border-radius: 999px;
  padding: 0.35rem 0.55rem;
  font-size: 0.74rem;
  line-height: 1.2;
}

/* ── Result card – clean, prominent ── */
.matrix-calc .result-card {
  background: var(--bg-secondary, #f8fafc);
  border: 1px solid var(--border, #e2e8f0);
  border-radius: var(--radius-lg, 0.75rem);
  padding: var(--space-6, 1.5rem);
  margin: var(--space-4, 1rem) 0;
  box-shadow: var(--shadow-sm, 0 1px 2px rgba(0,0,0,0.05));
}

[data-theme="dark"] .matrix-calc .result-card {
  background: var(--bg-secondary);
  border-color: var(--border);
}

/* ── Steps section header ── */
.matrix-calc #stepsArea h5,
.matrix-calc .matrix-steps-header {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

/* ── Step cards – subtle, scannable ── */
.matrix-calc .step-card {
  background: var(--bg-primary, #fff);
  border: 1px solid var(--border, #e2e8f0);
  border-radius: var(--radius-md, 0.5rem);
  padding: var(--space-4, 1rem) var(--space-5, 1.25rem);
  margin: var(--space-3, 0.75rem) 0;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.matrix-calc .step-card:hover {
  border-color: var(--mc-accent);
  box-shadow: 0 2px 8px var(--mc-accent-muted);
}

[data-theme="dark"] .matrix-calc .step-card {
  background: var(--bg-secondary);
  border-color: var(--border);
}

[data-theme="dark"] .matrix-calc .step-card:hover {
  border-color: var(--mc-accent);
}

/* ── Step layout ── */
.matrix-calc .step-card .step-inner {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3, 0.75rem);
}

/* ── Step number – compact pill ── */
.matrix-calc .step-number {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.75rem;
  background: var(--mc-accent);
  color: #fff;
  border-radius: var(--radius-full, 9999px);
  font-size: 0.8125rem;
  font-weight: 600;
}

/* ── Step description ── */
.matrix-calc .step-description {
  flex: 1;
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--text-secondary, #475569);
}

/* ── Matrix / LaTeX display ── */
.matrix-calc .matrix-display {
  display: block;
  text-align: center;
  padding: var(--space-4, 1rem);
  margin: var(--space-3, 0.75rem) 0;
  background: var(--bg-primary, #fff);
  border-radius: var(--radius-md, 0.5rem);
  border: 1px solid var(--border, #e2e8f0);
  overflow-x: auto;
}

[data-theme="dark"] .matrix-calc .matrix-display {
  background: var(--bg-secondary);
  border-color: var(--border);
}

.matrix-calc .matrix-display .MathJax_Preview,
.matrix-calc .matrix-display script[type^="math/tex"] {
  display: none !important;
}

/* ── Info badges (rank, power, etc.) ── */
.matrix-calc .info-badge,
.matrix-calc .eigenvalue-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full, 9999px);
  font-size: 0.8125rem;
  font-weight: 500;
  background: var(--mc-accent-muted);
  color: var(--mc-accent);
  margin: 0.2rem;
}

[data-theme="dark"] .matrix-calc .info-badge,
[data-theme="dark"] .matrix-calc .eigenvalue-badge {
  background: rgba(99, 102, 241, 0.2);
  color: var(--tool-primary);
}

/* ── Eigenvalue / eigenvector cards (eigenvalue tool) ── */
.matrix-calc .eigenvalue-card,
.matrix-calc .eigenvector-card {
  background: var(--bg-secondary, #f8fafc);
  border: 1px solid var(--border, #e2e8f0);
  border-radius: var(--radius-md, 0.5rem);
  padding: var(--space-4, 1rem);
  margin: var(--space-3, 0.75rem) 0;
}

.matrix-calc .eigenvalue-card {
  border-left: 3px solid var(--tool-primary, #f59e0b);
}

.matrix-calc .eigenvector-card {
  border-left: 3px solid var(--info, #3b82f6);
}

[data-theme="dark"] .matrix-calc .eigenvalue-card,
[data-theme="dark"] .matrix-calc .eigenvector-card {
  background: var(--bg-secondary);
  border-color: var(--border);
}

/* ── Operation badge ── */
.matrix-calc .operation-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-full, 9999px);
  font-size: 0.875rem;
  font-weight: 500;
  background: var(--mc-accent-muted);
  color: var(--mc-accent);
  margin: 0.2rem;
}

/* ── Step content spacing (semantic) ── */
.matrix-calc .step-content-block { margin-top: 0.5rem }
.matrix-calc .step-content-block + .step-content-block { margin-top: 0.75rem }
.matrix-calc .step-section { margin-bottom: 1rem }
.matrix-calc .step-section:last-child { margin-bottom: 0 }

/* ── Text helpers for step content ── */
.matrix-calc .matrix-display.mt-2,
.matrix-calc .mt-2 { margin-top: 0.5rem }
.matrix-calc .matrix-display.mt-3,
.matrix-calc .mt-3 { margin-top: 0.75rem }
.matrix-calc .matrix-display.mt-4,
.matrix-calc .mt-4 { margin-top: 1rem }
.matrix-calc .mb-1 { margin-bottom: 0.25rem }
.matrix-calc .mb-2 { margin-bottom: 0.5rem }
.matrix-calc .mb-3 { margin-bottom: 1rem }
.matrix-calc .mb-4 { margin-bottom: 1.5rem }
.matrix-calc .text-primary { color: var(--mc-accent) }
.matrix-calc .text-secondary { color: var(--text-secondary) }
.matrix-calc .text-muted { color: var(--text-muted) }
.matrix-calc .text-dark { color: var(--text-primary) }
.matrix-calc .small { font-size: 0.8125rem; color: var(--text-secondary) }
.matrix-calc .font-weight-bold { font-weight: 600 }

/* ── Action buttons (Share URL, Download Image, Print Worksheet) ── */
.matrix-calc .tool-btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: transparent;
  border: 1.5px solid var(--border, #cbd5e1);
  color: var(--text-secondary, #475569);
  padding: 0.4rem 0.75rem;
  font-size: 0.8125rem;
  font-weight: 500;
  border-radius: 0.5rem;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}
.matrix-calc .tool-btn-outline:hover {
  border-color: var(--tool-primary, #3b82f6);
  color: var(--tool-primary, #3b82f6);
  background: var(--mc-accent-muted, rgba(59,130,246,0.08));
}
.matrix-calc .tool-btn-outline:active {
  transform: scale(0.97);
}
.matrix-calc .tool-btn-outline i,
.matrix-calc .tool-btn-outline svg {
  font-size: 0.75rem;
  opacity: 0.8;
}
.matrix-calc .tool-btn-print {
  background: linear-gradient(135deg, #64748b, #475569);
  color: #fff;
  border: none;
}
.matrix-calc .tool-btn-print:hover {
  background: linear-gradient(135deg, #475569, #334155);
  color: #fff;
  box-shadow: 0 2px 8px rgba(71,85,105,0.3);
}

[data-theme="dark"] .matrix-calc .tool-btn-outline {
  border-color: var(--border, #475569);
  color: var(--text-secondary, #94a3b8);
}
[data-theme="dark"] .matrix-calc .tool-btn-outline:hover {
  border-color: #60a5fa;
  color: #93c5fd;
  background: rgba(59,130,246,0.12);
}
[data-theme="dark"] .matrix-calc .tool-btn-print {
  background: linear-gradient(135deg, #475569, #334155);
}
[data-theme="dark"] .matrix-calc .tool-btn-print:hover {
  background: linear-gradient(135deg, #334155, #1e293b);
  box-shadow: 0 2px 8px rgba(0,0,0,0.4);
}

/* ── Collapsible steps section ── */
.matrix-steps-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  cursor: pointer;
  user-select: none;
}
.matrix-steps-toggle .steps-chevron {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 0.25rem;
  transition: transform 0.2s ease, background 0.15s;
  font-size: 0.75rem;
  color: var(--text-muted, #94a3b8);
}
.matrix-steps-toggle:hover .steps-chevron {
  background: var(--mc-accent-muted, rgba(99,102,241,0.1));
  color: var(--tool-primary, #6366f1);
}
.matrix-steps-toggle[aria-expanded="false"] .steps-chevron {
  transform: rotate(-90deg);
}
.matrix-steps-toggle[aria-expanded="true"] .steps-chevron {
  transform: rotate(0deg);
}
.matrix-steps-body {
  overflow: hidden;
  transition: max-height 0.3s ease, opacity 0.2s ease;
}
.matrix-steps-body.collapsed {
  max-height: 0 !important;
  opacity: 0;
  padding-top: 0 !important;
  padding-bottom: 0 !important;
}

/* ── Print Worksheet (align with magic-square-generator) ── */
@media print {
  body * { visibility: hidden !important; }
  #printArea, #printArea * { visibility: visible !important; }
  #printArea { position: absolute; top: 0; left: 0; width: 100%; padding: 1rem; }
}
#printArea .tool-card-header,
#printArea .card-header { background: #334155 !important; color: #fff !important; -webkit-print-color-adjust: exact; print-color-adjust: exact; }
#printArea .result-card, #printArea .step-card, #printArea .card { border: 1px solid #e2e8f0; break-inside: avoid; }
#printArea .matrix-display { border: 1px solid #e2e8f0; }
.print-exercise-blank { display: inline-block; min-width: 60px; border-bottom: 1px solid #000; margin: 0 4px; vertical-align: middle; }
.print-matrix-grid { border-collapse: collapse; }
.print-matrix-grid td { border: 1px solid #333; padding: 0.35rem 0.6rem; text-align: center; font-family: monospace; min-width: 2em; }

/* ── Responsive ── */
@media (max-width: 767px) {
  .matrix-calc .result-card { padding: var(--space-4) }
  .matrix-calc .step-card { padding: var(--space-3) var(--space-4) }
  .matrix-calc .matrix-display { padding: var(--space-3); font-size: 0.9em }
  .matrix-calc .step-number { width: 1.5rem; height: 1.5rem; font-size: 0.75rem }
}