/* =============================================================
   369 TESLA OS Platform — Simulation Engine Styles
   ============================================================= */

/* ── Simulation Page Layout ──────────────────────────────────── */
.sim-hero {
  padding: calc(var(--nav-height) + 40px) 40px 40px;
  background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(123,47,247,0.15) 0%, transparent 70%);
  text-align: center;
}

.sim-page {
  padding: 40px;
  max-width: 1300px;
  margin: 0 auto;
}

/* ── Simulation Controls ─────────────────────────────────────── */
.sim-controls {
  background: var(--bg-card);
  border: var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.sim-controls-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
}

.sim-controls-title {
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 600;
  color: var(--cyan);
}

.process-input-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.input-group label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.input-group input,
.input-group select {
  background: var(--bg-base);
  border: var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 14px;
  color: var(--text-primary);
  transition: all var(--transition-normal);
  width: 100%;
}

.input-group input:focus,
.input-group select:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(0,212,255,0.1);
}

.input-group select option { background: var(--bg-card); }

/* Process Table */
.process-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: var(--border-subtle);
  margin-bottom: var(--space-lg);
}

.process-table {
  width: 100%;
  border-collapse: collapse;
}

.process-table th {
  background: rgba(0,212,255,0.08);
  padding: 12px 16px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--cyan);
  text-align: left;
  border-bottom: var(--border-subtle);
}

.process-table td {
  padding: 12px 16px;
  font-size: 14px;
  color: var(--text-secondary);
  border-bottom: var(--border-subtle);
  transition: background var(--transition-fast);
}

.process-table tr:last-child td { border-bottom: none; }
.process-table tr:hover td { background: var(--bg-hover); }

.process-table td input {
  background: transparent;
  border: 1px solid transparent;
  border-radius: 4px;
  padding: 4px 8px;
  color: var(--text-primary);
  font-size: 14px;
  width: 100%;
  transition: border-color var(--transition-fast);
}

.process-table td input:focus {
  outline: none;
  border-color: var(--cyan);
  background: rgba(0,212,255,0.05);
}

/* Process color labels */
.p-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
}

.p-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

/* ── Gantt Chart ─────────────────────────────────────────────── */
.sim-results {
  background: var(--bg-card);
  border: var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.sim-results-title {
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 600;
  color: var(--purple);
  margin-bottom: var(--space-xl);
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Gantt */
.gantt-container {
  overflow-x: auto;
  padding: var(--space-md) 0;
}

.gantt-chart {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: max-content;
}

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

.gantt-label {
  width: 60px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  text-align: right;
  flex-shrink: 0;
}

.gantt-bars {
  display: flex;
  align-items: center;
  gap: 2px;
}

.gantt-bar {
  height: 40px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  color: white;
  position: relative;
  cursor: pointer;
  transition: filter var(--transition-fast), transform var(--transition-fast);
  animation: barGrow 0.5s ease forwards;
  transform-origin: left center;
}

.gantt-bar:hover {
  filter: brightness(1.2);
  transform: scaleY(1.1);
  z-index: 1;
}

@keyframes barGrow {
  from { transform: scaleX(0); opacity: 0; }
  to   { transform: scaleX(1); opacity: 1; }
}

.gantt-timeline {
  display: flex;
  align-items: flex-start;
  gap: 2px;
  padding-left: 68px;
  margin-top: 4px;
}

.gantt-tick {
  font-size: 11px;
  color: var(--text-muted);
  text-align: center;
}

.gantt-idle {
  background: repeating-linear-gradient(
    45deg,
    rgba(255,255,255,0.03),
    rgba(255,255,255,0.03) 4px,
    transparent 4px,
    transparent 8px
  );
  border: 1px solid rgba(255,255,255,0.05);
  color: var(--text-muted) !important;
}

/* Process colors */
.p-0  { background: linear-gradient(135deg, #00d4ff, #0096cc); }
.p-1  { background: linear-gradient(135deg, #7b2ff7, #5a1fc4); }
.p-2  { background: linear-gradient(135deg, #ff6b35, #cc4400); }
.p-3  { background: linear-gradient(135deg, #00ff87, #00cc66); }
.p-4  { background: linear-gradient(135deg, #ffd700, #cc9900); }
.p-5  { background: linear-gradient(135deg, #ff2d87, #cc0060); }
.p-6  { background: linear-gradient(135deg, #40e0d0, #20a090); }
.p-7  { background: linear-gradient(135deg, #ff9f43, #cc7000); }

/* ── Result Stats ─────────────────────────────────────────────── */
.result-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-xl);
}

.result-stat {
  background: var(--bg-base);
  border: var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: center;
}

.result-stat-value {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 700;
  color: var(--cyan);
}

.result-stat-label {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* ── Process Queue Animation ─────────────────────────────────── */
.queue-visualization {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: var(--space-lg);
  background: var(--bg-base);
  border-radius: var(--radius-md);
  border: var(--border-subtle);
  overflow-x: auto;
  margin-top: var(--space-lg);
}

.queue-label {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  white-space: nowrap;
  margin-right: 8px;
}

.queue-item {
  min-width: 50px;
  height: 50px;
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  color: white;
  animation: queueIn 0.3s ease;
  flex-shrink: 0;
}

@keyframes queueIn {
  from { opacity: 0; transform: scale(0.5); }
  to   { opacity: 1; transform: scale(1); }
}

.queue-arrow {
  color: var(--text-muted);
  font-size: 16px;
}

/* ── Memory Frame Visualization ─────────────────────────────── */
.memory-frames {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  margin: var(--space-lg) 0;
}

.memory-frame {
  width: 80px;
  height: 80px;
  border: 2px solid var(--glass-border);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  transition: all var(--transition-normal);
  position: relative;
}

.memory-frame.page-hit {
  border-color: var(--green);
  background: rgba(0,255,135,0.1);
  animation: hitFlash 0.4s ease;
}

.memory-frame.page-fault {
  border-color: #ff3b5c;
  background: rgba(255,59,92,0.1);
  animation: faultShake 0.4s ease;
}

.memory-frame.empty {
  color: var(--text-muted);
  border-style: dashed;
}

.frame-number {
  position: absolute;
  top: 4px;
  left: 6px;
  font-size: 9px;
  color: var(--text-muted);
  font-weight: 400;
}

@keyframes hitFlash {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

@keyframes faultShake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}

/* ── Reference String ─────────────────────────────────────────── */
.ref-string-display {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin: var(--space-md) 0;
}

.ref-page {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  background: var(--bg-surface);
  border: var(--border-subtle);
  transition: all var(--transition-normal);
}

.ref-page.current {
  border-color: var(--cyan);
  background: rgba(0,212,255,0.1);
  box-shadow: var(--glow-cyan);
  transform: scale(1.15);
}

.ref-page.hit  { background: rgba(0,255,135,0.15); border-color: var(--green); color: var(--green); }
.ref-page.miss { background: rgba(255,59,92,0.15); border-color: #ff3b5c; color: #ff3b5c; }

/* ── Resource Graph (Deadlock) ─────────────────────────────────── */
.resource-graph-canvas {
  width: 100%;
  height: 400px;
  border: var(--border-subtle);
  border-radius: var(--radius-lg);
  background: var(--bg-base);
  position: relative;
}

/* ── Algorithm Selector ──────────────────────────────────────── */
.algo-selector {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  margin-bottom: var(--space-lg);
}

.algo-btn {
  padding: 10px 20px;
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 600;
  border: var(--border-subtle);
  background: var(--bg-surface);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-normal);
}

.algo-btn:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}

.algo-btn.active {
  background: rgba(0,212,255,0.15);
  border-color: var(--cyan);
  color: var(--cyan);
  box-shadow: var(--glow-cyan);
}

/* ── Simulation Lab Index ─────────────────────────────────────── */
.sim-lab-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-xl);
}

.sim-lab-card {
  background: var(--bg-card);
  border: var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  text-decoration: none;
  display: block;
}

.sim-lab-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--grad-primary);
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

.sim-lab-card:hover::before { transform: scaleX(1); }

.sim-lab-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0,212,255,0.3);
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
}

.sim-lab-icon {
  font-size: 40px;
  margin-bottom: var(--space-md);
  display: block;
}

.sim-lab-title {
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}

.sim-lab-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

.sim-lab-tag {
  display: inline-flex;
  margin-top: var(--space-md);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  background: rgba(0,212,255,0.1);
  color: var(--cyan);
  border: 1px solid rgba(0,212,255,0.2);
}

/* ── Disk Scheduling Graph ────────────────────────────────────── */
.disk-graph canvas {
  width: 100%;
  border-radius: var(--radius-md);
  border: var(--border-subtle);
}

/* ── Semaphore / Producer-Consumer ───────────────────────────── */
.pc-visualization {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: var(--space-xl);
  align-items: center;
  padding: var(--space-xl);
  background: var(--bg-base);
  border-radius: var(--radius-lg);
  border: var(--border-subtle);
}

.producer-area, .consumer-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
}

.buffer-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.buffer-slot {
  width: 60px;
  height: 60px;
  border: 2px solid var(--glass-border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 700;
  transition: all var(--transition-normal);
}

.buffer-slot.filled {
  border-color: var(--green);
  background: rgba(0,255,135,0.1);
  animation: bufferFill 0.3s ease;
}

@keyframes bufferFill {
  0% { transform: scale(0.8); }
  100% { transform: scale(1); }
}

/* ── Responsive ───────────────────────────────────────────────── */
@media (max-width: 768px) {
  .sim-page { padding: 20px; }
  .sim-hero { padding: calc(var(--nav-height) + 20px) 20px 20px; }
  .result-stats { grid-template-columns: repeat(2, 1fr); }
  .pc-visualization { grid-template-columns: 1fr; }
}