/* ==========================================================================
   base2ace Academy - Visualizer Page Styles (`array.html`)
   ========================================================================== */

/* Visualizer Top Bar & Control Layout */
.viz-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.viz-title-group h1 {
  font-size: 1.8rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.viz-title-group p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.viz-config-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--bg-surface);
  border: 1px solid var(--bg-surface-border);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
  flex-wrap: wrap;
}

.config-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.config-input {
  background: var(--bg-main);
  border: 1px solid var(--bg-surface-border);
  color: var(--text-main);
  padding: 0.35rem 0.6rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-code);
  font-size: 0.85rem;
  width: 65px;
  text-align: center;
}

.config-input:focus {
  outline: none;
  border-color: var(--primary);
}

/* Dual Column Visualizer Layout */
.viz-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 1.5rem;
}

@media (max-width: 1100px) {
  .viz-layout {
    grid-template-columns: 1fr;
  }
}

/* Visualizer Left Container */
.viz-canvas-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-surface-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  box-shadow: var(--shadow-card);
}

/* Categorized Operation Navigation Bar */
.op-nav-bar {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  border-bottom: 1px solid var(--bg-surface-border);
  padding-bottom: 0.85rem;
}

.op-nav-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.op-controls-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.op-category-pills {
  display: flex;
  gap: 0.35rem;
  background: var(--bg-surface);
  border: 1px solid var(--bg-surface-border);
  padding: 0.25rem;
  border-radius: var(--radius-md);
}

.op-cat-pill {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
}

.op-cat-pill:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.05);
}

.op-cat-pill.active {
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 2px 6px rgba(59, 130, 246, 0.3);
}

.op-dropdown-wrapper {
  position: relative;
}

.op-dropdown-select {
  background: var(--bg-surface);
  border: 1.5px solid var(--primary);
  color: var(--text-main);
  font-size: 0.88rem;
  font-weight: 600;
  font-family: var(--font-sans);
  padding: 0.45rem 2.2rem 0.45rem 0.85rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  outline: none;
  transition: var(--transition);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%3C3B82F6' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
}

.op-dropdown-select:focus, .op-dropdown-select:hover {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.op-dropdown-select optgroup {
  background: var(--bg-card);
  color: var(--text-muted);
  font-weight: 700;
  font-style: normal;
  padding: 0.4rem;
}

.op-dropdown-select option {
  background: var(--bg-main);
  color: var(--text-main);
  padding: 0.4rem;
  font-weight: 500;
}

/* Operation Tabs Bar */
.operation-tabs {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding-top: 0.25rem;
  flex-wrap: wrap;
}

.op-tab {
  background: transparent;
  border: 1px solid var(--bg-surface-border);
  color: var(--text-muted);
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.82rem;
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition);
}

.op-tab:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--text-muted);
}

.op-tab.active {
  background: rgba(59, 130, 246, 0.18);
  color: var(--primary);
  border-color: var(--primary);
  font-weight: 700;
}


/* Interactive Input Bar for Selected Operation */
.op-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--bg-surface);
  border: 1px solid var(--bg-surface-border);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  flex-wrap: wrap;
}

.op-input-group {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
}

.op-input-group label {
  color: var(--text-muted);
}

.op-input {
  background: var(--bg-main);
  border: 1px solid var(--bg-surface-border);
  color: var(--text-main);
  padding: 0.4rem 0.6rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-code);
  font-size: 0.88rem;
  width: 80px;
}

/* Memory Array Interactive Stage */
.array-stage {
  min-height: 240px;
  background: rgba(11, 15, 25, 0.7);
  border: 1px dashed rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  position: relative;
  overflow-x: auto;
}

.array-nodes-container {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 0;
}

/* Individual Array Node */
.array-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
}

.node-box {
  width: 65px;
  height: 65px;
  background: var(--bg-surface);
  border: 2px solid var(--bg-surface-border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-code);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
  transition: all 0.35s ease;
  position: relative;
}

.node-index {
  font-family: var(--font-code);
  font-size: 0.75rem;
  color: var(--text-dim);
  font-weight: 600;
}

.node-address {
  font-family: var(--font-code);
  font-size: 0.68rem;
  color: var(--secondary);
  opacity: 0.85;
}

/* Array Node Highlight States */
.array-node.highlight-current .node-box {
  border-color: var(--accent-amber);
  background: rgba(245, 158, 11, 0.2);
  box-shadow: 0 0 18px rgba(245, 158, 11, 0.4);
  transform: translateY(-8px) scale(1.05);
}

.array-node.highlight-success .node-box {
  border-color: var(--accent-green);
  background: rgba(16, 185, 129, 0.25);
  box-shadow: 0 0 20px rgba(16, 185, 129, 0.5);
  transform: translateY(-8px) scale(1.08);
}

.array-node.highlight-target .node-box {
  border-color: var(--accent-red);
  background: rgba(239, 68, 68, 0.2);
  box-shadow: 0 0 18px rgba(239, 68, 68, 0.4);
}

.array-node.highlight-pointer .node-box {
  border-color: var(--primary);
  background: rgba(59, 130, 246, 0.2);
  box-shadow: 0 0 18px var(--primary-glow);
}

.array-node.node-empty .node-box {
  border-style: dashed;
  color: var(--text-dim);
  background: transparent;
}

/* Pointer Arrow Indicator above Nodes */
.node-pointer {
  position: absolute;
  top: -28px;
  font-size: 0.75rem;
  font-family: var(--font-code);
  font-weight: 700;
  padding: 0.15rem 0.4rem;
  border-radius: var(--radius-sm);
  background: var(--accent-amber);
  color: #000;
  box-shadow: 0 2px 8px rgba(0,0,0,0.4);
}

.node-pointer::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 50%;
  transform: translateX(-50%);
  border-width: 5px 5px 0;
  border-style: solid;
  border-color: var(--accent-amber) transparent;
}

/* Step Execution Message & Progress Bar */
.step-banner {
  background: var(--bg-surface);
  border: 1px solid var(--bg-surface-border);
  border-left: 4px solid var(--primary);
  padding: 0.85rem 1.25rem;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.9rem;
}

.step-banner.success {
  border-left-color: var(--accent-green);
  background: rgba(16, 185, 129, 0.08);
}

.step-banner.warning {
  border-left-color: var(--accent-amber);
  background: rgba(245, 158, 11, 0.08);
}

.step-banner.error {
  border-left-color: var(--accent-red);
  background: rgba(239, 68, 68, 0.08);
}

/* Playback Control Strip */
.playback-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-surface);
  border: 1px solid var(--bg-surface-border);
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  flex-wrap: wrap;
  gap: 1.25rem;
}

.playback-buttons {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-wrap: wrap;
}

.btn-play-pause {
  background: linear-gradient(135deg, var(--primary), #2563eb) !important;
  color: #ffffff !important;
  font-weight: 700 !important;
  font-size: 0.95rem !important;
  padding: 0.55rem 1.35rem !important;
  box-shadow: 0 4px 15px var(--primary-glow) !important;
  min-width: 140px;
}

.btn-play-pause.playing {
  background: linear-gradient(135deg, #f59e0b, #d97706) !important;
  box-shadow: 0 4px 15px rgba(245, 158, 11, 0.4) !important;
}

.btn-step {
  background: var(--bg-main) !important;
  border: 1px solid rgba(255, 255, 255, 0.15) !important;
  color: var(--text-main) !important;
  font-weight: 600 !important;
}

.btn-step:hover {
  background: rgba(255, 255, 255, 0.1) !important;
  border-color: var(--primary) !important;
}

.btn-reset {
  background: rgba(239, 68, 68, 0.12) !important;
  border: 1px solid rgba(239, 68, 68, 0.3) !important;
  color: #fca5a5 !important;
}

.btn-reset:hover {
  background: rgba(239, 68, 68, 0.25) !important;
}

.speed-control {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.88rem;
  color: var(--text-muted);
  background: var(--bg-main);
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--bg-surface-border);
}

.speed-label-badge {
  font-family: var(--font-code);
  font-weight: 700;
  color: var(--secondary);
  font-size: 0.85rem;
  min-width: 85px;
}

.speed-slider {
  accent-color: var(--primary);
  cursor: pointer;
  width: 110px;
}

/* Step Counter Badge for Manual & Auto Play */
.step-counter-badge {
  background: rgba(59, 130, 246, 0.15);
  color: var(--primary);
  border: 1px solid rgba(59, 130, 246, 0.35);
  font-family: var(--font-code);
  font-weight: 700;
  font-size: 0.9rem;
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-md);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.step-counter-badge.manual {
  background: rgba(245, 158, 11, 0.15);
  color: var(--accent-amber);
  border-color: rgba(245, 158, 11, 0.35);
}

/* Right Panel: C Code Editor Window */
.code-panel {
  background: #0d1322;
  border: 1px solid var(--bg-surface-border);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.code-panel-header {
  background: rgba(15, 23, 42, 0.9);
  padding: 0.85rem 1.25rem;
  border-bottom: 1px solid var(--bg-surface-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.code-panel-title {
  font-size: 0.9rem;
  font-weight: 700;
  font-family: var(--font-code);
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.c-badge {
  background: rgba(59, 130, 246, 0.2);
  color: #60a5fa;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-family: var(--font-code);
}

.code-view {
  font-family: var(--font-code);
  font-size: 0.84rem;
  line-height: 1.6;
  padding: 1rem 0;
  overflow-x: hidden;
  flex-grow: 1;
}

.code-line {
  display: flex;
  padding: 0.15rem 1rem;
  transition: background 0.2s ease;
  white-space: pre-wrap;
  word-break: break-word;
}

.code-line.active-line {
  background: rgba(245, 158, 11, 0.2);
  border-left: 3px solid var(--accent-amber);
}

.line-num {
  width: 28px;
  color: var(--text-dim);
  user-select: none;
  font-size: 0.78rem;
  flex-shrink: 0;
}

.line-text {
  color: #e2e8f0;
  white-space: pre-wrap;
  word-break: break-word;
  flex-grow: 1;
}

/* Syntax Highlighting Tokens */
.syn-kw { color: #f472b6; font-weight: 600; } /* int, for, if, return */
.syn-fn { color: #60a5fa; }                   /* printf, malloc */
.syn-num { color: #38bdf8; }                  /* 0, 1, 4 */
.syn-op { color: #f59e0b; }                   /* =, +, <, & */
.syn-str { color: #34d399; }                  /* "%d" */
.syn-cmt { color: #64748b; font-style: italic; } /* // comments */

/* Variables Tracker Box below Code */
.variable-tracker {
  background: #080d1a;
  border-top: 3px solid rgba(59, 130, 246, 0.4);
  padding: 1.5rem 1.75rem;
  font-family: var(--font-code);
}

.var-tracker-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.1rem;
}

.var-tracker-title {
  color: #60a5fa;
  font-size: 1.05rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.var-list {
  display: flex;
  gap: 1.1rem;
  flex-wrap: wrap;
}

.var-item {
  background: linear-gradient(135deg, rgba(20, 30, 50, 0.95), rgba(12, 18, 32, 0.95));
  border: 2px solid rgba(59, 130, 246, 0.45);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.5), inset 0 0 12px rgba(59, 130, 246, 0.1);
  font-size: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.var-item:hover {
  transform: translateY(-2px);
  border-color: var(--secondary);
}

.var-name {
  color: #38bdf8;
  font-weight: 800;
  font-size: 1.2rem;
}

.var-equals {
  color: var(--text-dim);
  font-weight: 600;
}

.var-val {
  color: #f59e0b;
  font-weight: 800;
  font-size: 1.45rem;
  background: rgba(245, 158, 11, 0.15);
  padding: 0.15rem 0.6rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(245, 158, 11, 0.35);
}

/* Theory & Complexity Cards Below Stage */
.theory-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.theory-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-surface-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
}

.theory-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.complexity-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.complexity-table th, .complexity-table td {
  padding: 0.5rem 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--bg-surface-border);
}

.complexity-table th {
  color: var(--text-dim);
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
}

.comp-badge {
  font-family: var(--font-code);
  font-weight: 700;
  padding: 0.15rem 0.4rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
}

.comp-o1 { background: rgba(16, 185, 129, 0.15); color: var(--accent-green); }
.comp-on { background: rgba(245, 158, 11, 0.15); color: var(--accent-amber); }
.comp-ologn { background: rgba(59, 130, 246, 0.15); color: var(--primary); }

/* Memory Inspector Modal Content */
.mem-formula-box {
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.3);
  padding: 1.25rem;
  border-radius: var(--radius-md);
  margin-bottom: 1.5rem;
  text-align: center;
}

.mem-formula {
  font-family: var(--font-code);
  font-size: 1.15rem;
  font-weight: 700;
  color: #93c5fd;
  margin-top: 0.3rem;
}

.mem-table-wrapper {
  max-height: 300px;
  overflow-y: auto;
  margin-top: 1rem;
}

.mem-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-code);
  font-size: 0.85rem;
}

.mem-table th, .mem-table td {
  padding: 0.65rem 1rem;
  border: 1px solid var(--bg-surface-border);
  text-align: center;
}

.mem-table th {
  background: var(--bg-surface);
  color: var(--text-muted);
}

/* Code Line Highlighting for Playback Engine */
.code-line {
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.code-line.active-code-line {
  background: rgba(6, 182, 212, 0.25) !important;
  border-left: 3.5px solid var(--secondary) !important;
  box-shadow: 0 0 12px rgba(6, 182, 212, 0.3);
}
.code-line.active-code-line span {
  color: var(--text-main) !important;
  font-weight: 700 !important;
}

/* Mobile Touch & Layout Optimizations */
@media (max-width: 640px) {
  .op-controls {
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
  }

  .op-input-group {
    width: 100%;
    justify-content: space-between;
  }

  .op-input {
    flex-grow: 1;
    text-align: right;
  }

  .op-nav-bar {
    padding: 0.75rem;
  }

  .op-dropdown-select {
    width: 100%;
  }

  .matrix-layout-grid {
    grid-template-columns: 1fr !important;
  }

  .viz-header {
    flex-direction: column;
    align-items: stretch;
    gap: 0.85rem;
  }

  .mode-toggle-group {
    width: 100%;
    display: flex;
  }

  .btn-toggle {
    flex: 1;
    text-align: center;
  }

  /* Touch Friendly 42px+ Buttons on Mobile */
  .btn {
    min-height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    touch-action: manipulation;
  }
}