/* ==========================================================================
   Circuito vertical de canicas y simulador de físicas - Estilos Oficiales
   Cumplimiento estricto de estándares Fijate Tools: Outfit / Inter / JetBrains Mono
   ========================================================================== */

:root {
  --font-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Outfit', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Paleta Modo Oscuro (Predeterminado) */
  --bg-primary: #0b0f19;
  --bg-card: #131b2e;
  --bg-card-hover: #1b2640;
  --bg-card-secondary: #0f1626;
  --border-color: #1e293b;
  --border-focus: #38bdf8;
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --accent-cyan: #38bdf8;
  --accent-blue: #3b82f6;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;
  --accent-purple: #a855f7;
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 32px rgba(0, 0, 0, 0.5);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-hover: #f1f5f9;
  --bg-card-secondary: #f8fafc;
  --border-color: #e2e8f0;
  --border-focus: #0284c7;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --accent-cyan: #0284c7;
  --accent-blue: #2563eb;
  --accent-emerald: #059669;
  --accent-amber: #d97706;
  --accent-rose: #e11d48;
  --accent-purple: #9333ea;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.12);
}

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

body {
  font-family: var(--font-base);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.5;
  overflow-x: clip;
  width: 100%;
  max-width: 100%;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-main);
}

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

/* Layout Canónico */
.main-wrapper.tool-layout {
  max-width: 1200px;
  margin: 1.5rem auto 3rem;
  padding: 0 1rem;
  width: 100%;
  flex: 1 0 auto;
}

.tool-with-sidebar {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
}

.tool-main-content {
  flex: 1 1 0%;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* Tarjeta Principal */
.card-main {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

@media (max-width: 640px) {
  .card-main {
    padding: 1rem;
    gap: 1rem;
  }
}

/* Encabezado del Nivel / Modo */
.circuit-header-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.circuit-title-area {
  flex: 1 1 260px;
}

.circuit-title-area h2 {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  letter-spacing: -0.01em;
}

.circuit-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-top: 0.3rem;
  line-height: 1.45;
}

/* Pestañas de modo (Desafíos / Taller libre) */
.circuit-tabs-nav,
.mode-tabs {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--bg-card-secondary);
  padding: 0.3rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.2);
}

.circuit-tabs-nav .tab-btn,
.tab-btn,
.btn-tab {
  min-height: 40px;
  padding: 0.45rem 1.15rem;
  font-family: var(--font-heading);
  font-size: 0.92rem;
  font-weight: 600;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  user-select: none;
  -webkit-user-select: none;
}

.circuit-tabs-nav .tab-btn svg,
.tab-btn svg,
.btn-tab svg {
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.circuit-tabs-nav .tab-btn:hover,
.tab-btn:hover,
.btn-tab:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.05);
}

.circuit-tabs-nav .tab-btn:hover svg,
.tab-btn:hover svg,
.btn-tab:hover svg {
  transform: scale(1.1);
}

.circuit-tabs-nav .tab-btn.active,
.tab-btn.active,
.btn-tab.active {
  background: var(--accent-cyan);
  color: #ffffff;
  font-weight: 700;
  border-color: rgba(255, 255, 255, 0.15);
  box-shadow: 0 2px 10px rgba(56, 189, 248, 0.35);
}

[data-theme="light"] .circuit-tabs-nav,
[data-theme="light"] .mode-tabs {
  background: #e2e8f0;
  border-color: #cbd5e1;
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.06);
}

[data-theme="light"] .circuit-tabs-nav .tab-btn,
[data-theme="light"] .tab-btn,
[data-theme="light"] .btn-tab {
  color: #64748b;
}

[data-theme="light"] .circuit-tabs-nav .tab-btn:hover,
[data-theme="light"] .tab-btn:hover,
[data-theme="light"] .btn-tab:hover {
  color: #0f172a;
  background: rgba(255, 255, 255, 0.7);
}

[data-theme="light"] .circuit-tabs-nav .tab-btn.active,
[data-theme="light"] .tab-btn.active,
[data-theme="light"] .btn-tab.active {
  background: var(--accent-cyan);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(2, 132, 199, 0.3);
}

/* Barra de Puesta en Marcha / Acciones */
.circuit-action-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  background: var(--bg-card-secondary);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.action-buttons-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.btn-action-main {
  min-height: 42px;
  padding: 0 1.25rem;
  border-radius: var(--radius-md);
  border: none;
  background: var(--accent-emerald);
  color: #ffffff;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.15s ease;
  box-shadow: var(--shadow-sm);
}

.btn-action-main:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
}

.btn-action-main.btn-running {
  background: var(--accent-amber);
}

.btn-action-main.btn-paused {
  background: var(--accent-emerald, #10b981);
  box-shadow: 0 0 14px rgba(16, 185, 129, 0.4);
}

.btn-action-sub {
  min-height: 42px;
  padding: 0 0.9rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-main);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: all 0.15s ease;
}

.btn-action-sub:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-focus);
}

.action-settings-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
}

.control-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.control-pill select {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  font-family: var(--font-base);
  font-size: 0.85rem;
  padding: 0.35rem 0.6rem;
  border-radius: var(--radius-sm);
  outline: none;
  cursor: pointer;
  max-width: 140px;
}

.control-pill select:focus {
  border-color: var(--border-focus);
}

/* Área de Simulación / Tablero Vertical */
.canvas-wrapper {
  position: relative;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  background: #000000;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-color);
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.4);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.canvas-wrapper.canvas-drop-active {
  border-color: #38bdf8;
  box-shadow: 0 0 25px rgba(56, 189, 248, 0.35), inset 0 0 15px rgba(56, 189, 248, 0.2);
}

#webgl-container {
  width: 100%;
  height: 680px;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  touch-action: none;
  user-select: none;
  cursor: default;
}

#webgl-container:active {
  cursor: default;
}

#webgl-container canvas {
  width: 100% !important;
  height: 100% !important;
  display: block;
  outline: none;
}

@media (max-width: 768px) {
  #webgl-container {
    height: 520px;
  }
}

/* HUD Telemetría flotante */
.hud-overlay {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  padding: 0.6rem 0.9rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  pointer-events: none;
  box-shadow: var(--shadow-md);
}

.hud-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  font-size: 0.8rem;
  color: #cbd5e1;
}

.hud-val {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--accent-cyan);
}

.star-pill {
  color: #475569;
  font-size: 1rem;
  transition: color 0.2s ease;
}

/* Indicador flotante de estado de la simulación */
.circuit-status-banner {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background: rgba(15, 23, 42, 0.9);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.45rem 0.9rem;
  border-radius: 9999px;
  font-size: 0.8rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  z-index: 35;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
  transition: all 0.25s ease;
  pointer-events: none;
}

.circuit-status-banner .status-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  display: inline-block;
  flex-shrink: 0;
}

.circuit-status-banner.status-running {
  border-color: rgba(16, 185, 129, 0.5);
  color: #a7f3d0;
}

.circuit-status-banner.status-running .status-dot {
  background: #10b981;
  box-shadow: 0 0 8px #10b981;
  animation: pulse-dot 1.5s infinite ease-in-out;
}

.circuit-status-banner.status-paused {
  border-color: rgba(245, 158, 11, 0.5);
  background: rgba(30, 27, 18, 0.94);
  color: #fde68a;
}

.circuit-status-banner.status-paused .status-dot {
  background: #f59e0b;
  box-shadow: 0 0 8px #f59e0b;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}

/* Toast flotante de aviso e información contextual */
.circuit-toast {
  position: absolute;
  top: 1.1rem;
  left: 50%;
  transform: translateX(-50%) translateY(-15px);
  background: rgba(15, 23, 42, 0.96);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(56, 189, 248, 0.4);
  color: #f8fafc;
  padding: 0.55rem 1.25rem;
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.55rem;
  box-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.6), 0 0 15px rgba(56, 189, 248, 0.15);
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s cubic-bezier(0.16, 1, 0.3, 1), transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.25s;
  z-index: 55;
  white-space: nowrap;
}

.circuit-toast.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.circuit-toast.toast-warning {
  border-color: rgba(245, 158, 11, 0.5);
  box-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.6), 0 0 15px rgba(245, 158, 11, 0.2);
}

.circuit-toast.toast-info {
  border-color: rgba(56, 189, 248, 0.4);
}

.circuit-toast.toast-locked {
  border-color: rgba(239, 68, 68, 0.5);
  box-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.6), 0 0 15px rgba(239, 68, 68, 0.25);
}

.circuit-toast-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

/* Barra contextual fija para la pieza seleccionada (Dock inferior centrado) */
.piece-controls-dock {
  position: absolute;
  bottom: 1.25rem;
  left: 50%;
  transform: translateX(-50%) translateY(12px);
  display: flex;
  align-items: center;
  gap: 0.65rem;
  background: rgba(15, 23, 42, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(56, 189, 248, 0.35);
  border-radius: 9999px;
  padding: 0.4rem 0.6rem 0.4rem 0.9rem;
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.6), 0 0 15px rgba(56, 189, 248, 0.2);
  z-index: 25;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.22s cubic-bezier(0.16, 1, 0.3, 1), transform 0.22s cubic-bezier(0.16, 1, 0.3, 1);
  max-width: calc(100% - 1.5rem);
  white-space: nowrap;
}

.piece-controls-dock.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.dock-piece-info {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding-right: 0.25rem;
  user-select: none;
}

.dock-piece-badge {
  font-size: 0.8rem;
  font-weight: 700;
  color: #38bdf8;
  letter-spacing: 0.02em;
}

.dock-piece-meta {
  font-size: 0.72rem;
  font-family: 'JetBrains Mono', monospace;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.08);
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
}

.dock-actions {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.btn-dock {
  width: 36px;
  height: 36px;
  min-width: 36px;
  min-height: 36px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(30, 41, 59, 0.85);
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.16s ease;
}

.btn-dock:hover {
  background: rgba(56, 189, 248, 0.2);
  border-color: #38bdf8;
  color: #ffffff;
  transform: scale(1.06);
}

.btn-dock:active {
  transform: scale(0.96);
}

.btn-dock.btn-dock-delete:hover {
  background: rgba(239, 68, 68, 0.25);
  border-color: #ef4444;
  color: #ef4444;
}

.btn-dock.btn-dock-close {
  width: 30px;
  height: 30px;
  min-width: 30px;
  min-height: 30px;
  border-radius: 50%;
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
}

.btn-dock.btn-dock-close:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-main);
}

.dock-sep {
  width: 1px;
  height: 18px;
  background: rgba(255, 255, 255, 0.15);
  margin: 0 0.15rem;
}

@media (max-width: 640px) {
  .piece-controls-dock {
    bottom: 0.75rem;
    padding: 0.35rem 0.5rem;
    gap: 0.4rem;
  }

  .dock-piece-badge {
    font-size: 0.75rem;
    max-width: 75px;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .btn-dock {
    width: 34px;
    height: 34px;
    min-width: 34px;
    min-height: 34px;
  }
}

/* Panel de Herramientas / Catálogo de piezas */
.toolbox-section {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.toolbox-title {
  font-size: 0.95rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
}

.toolbox-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 0.6rem;
}

.tool-item {
  position: relative;
  min-height: 48px;
  background: var(--bg-card-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.5rem 0.6rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.3rem;
  color: var(--text-main);
  cursor: grab;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  transition: all 0.15s ease;
}

.tool-item:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-focus);
  transform: translateY(-2px);
}

.tool-item:active {
  cursor: grabbing;
}

.tool-item.disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
  filter: grayscale(0.8);
}

/* Avatar fantasma de arrastre desde la caja de herramientas hacia el lienzo 3D */
.toolbox-drag-ghost {
  position: fixed;
  top: 0;
  left: 0;
  pointer-events: none;
  z-index: 10000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  padding: 0.55rem 0.85rem;
  background: rgba(15, 23, 42, 0.94);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 2px solid #38bdf8;
  border-radius: var(--radius-md);
  color: #ffffff;
  font-size: 0.78rem;
  font-weight: 700;
  box-shadow: 0 14px 35px rgba(0, 0, 0, 0.7), 0 0 25px rgba(56, 189, 248, 0.5);
  transform: translate(-50%, -50%) scale(1.1);
  will-change: transform, left, top;
}

.toolbox-drag-ghost svg {
  width: 28px;
  height: 28px;
  stroke: #38bdf8;
}

.tool-item-icon {
  color: var(--accent-cyan);
}

.tool-item-name {
  font-size: 0.75rem;
  font-weight: 600;
  text-align: center;
}

.tool-item-badge {
  position: absolute;
  top: 4px;
  right: 6px;
  background: var(--accent-blue);
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 1px 5px;
  border-radius: 999px;
}

/* Panel de Niveles */
.levels-section {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.levels-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 0.6rem;
}

.level-card {
  min-height: 64px;
  background: var(--bg-card-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.2rem;
  cursor: pointer;
  transition: all 0.15s ease;
  color: var(--text-main);
}

.level-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-focus);
}

.level-card.current {
  border-color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.1);
}

.level-card.locked {
  opacity: 0.45;
  cursor: not-allowed;
  filter: grayscale(0.9);
}

.level-card-number {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.1rem;
}

.level-card-stars {
  display: flex;
  gap: 2px;
}

.star-icon {
  font-size: 0.75rem;
  color: #475569;
}

.star-icon.active {
  color: #fbbf24;
}

.level-card-title {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

/* Sección Didáctica y de Fundamentos */
.card-educational {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-md);
}

.edu-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
  margin-top: 1rem;
}

.edu-item {
  background: var(--bg-card-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
}

.edu-item h4 {
  font-size: 1rem;
  color: var(--accent-cyan);
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.edu-item p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Modales Institucionales Canónicos */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 1rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.modal-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  max-width: 440px;
  width: 100%;
  box-shadow: var(--shadow-lg);
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  transform: scale(0.95);
  transition: transform 0.2s ease;
}

.modal-backdrop.open .modal-card {
  transform: scale(1);
}

.modal-card h3 {
  font-size: 1.5rem;
}

.modal-stars-container {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
}

.star-huge {
  font-size: 2.5rem;
  color: #334155;
  transition: transform 0.3s ease, color 0.3s ease;
}

.star-huge.active {
  color: #fbbf24;
  text-shadow: 0 0 12px #f59e0b;
  transform: scale(1.15);
}

.modal-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
}

.modal-actions {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
}

.btn-modal-primary {
  min-height: 42px;
  padding: 0 1.5rem;
  border-radius: var(--radius-md);
  border: none;
  background: var(--accent-emerald);
  color: #ffffff;
  font-family: var(--font-heading);
  font-weight: 700;
  cursor: pointer;
  transition: filter 0.15s ease;
}

.btn-modal-primary:hover {
  filter: brightness(1.1);
}

.btn-modal-secondary {
  min-height: 42px;
  padding: 0 1.25rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: var(--bg-card-secondary);
  color: var(--text-main);
  font-family: var(--font-heading);
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease;
}

.btn-modal-secondary:hover {
  background: var(--bg-card-hover);
}

.modal-card-wide {
  max-width: 580px;
}

.modal-header-custom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.75rem;
}

.modal-header-custom h3 {
  margin: 0;
  font-size: 1.35rem;
}

.btn-modal-close {
  background: transparent;
  border: none;
  font-size: 1.6rem;
  line-height: 1;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  transition: color 0.15s ease, background 0.15s ease;
}

.btn-modal-close:hover {
  color: #ef4444;
  background: rgba(239, 68, 68, 0.1);
}

.modal-form-group {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.4rem;
  width: 100%;
}

.modal-input-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}

.modal-text-input {
  width: 100%;
  min-height: 42px;
  padding: 0.6rem 0.85rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-card-secondary);
  color: var(--text-main);
  font-family: var(--font-base);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.modal-text-input:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.2);
}

.modal-actions-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  flex-wrap: wrap;
}

.modal-action-buttons {
  display: flex;
  gap: 0.5rem;
}

/* Lista de pistas guardadas en el modal */
.saved-circuits-container {
  max-height: 280px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin: 0.25rem 0;
  padding-right: 0.25rem;
}

.saved-circuit-card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: var(--bg-card-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: border-color 0.15s ease, background 0.15s ease;
}

.saved-circuit-card:hover {
  border-color: var(--border-focus);
  background: var(--bg-card-hover);
}

.saved-circuit-info {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.25rem;
  text-align: left;
  flex: 1;
  min-width: 0;
}

.saved-circuit-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

.saved-circuit-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.badge-meta {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.12rem 0.45rem;
  border-radius: 4px;
  background: rgba(56, 189, 248, 0.1);
  color: #38bdf8;
  font-size: 0.72rem;
  font-weight: 600;
}

.saved-circuit-actions {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-shrink: 0;
}

.btn-circuit-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  min-height: 34px;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: filter 0.15s ease, background 0.15s ease;
}

.btn-circuit-load {
  background: rgba(16, 185, 129, 0.15);
  border-color: rgba(16, 185, 129, 0.3);
  color: #34d399;
}

.btn-circuit-load:hover {
  background: #10b981;
  color: #ffffff;
}

.btn-circuit-export {
  background: rgba(56, 189, 248, 0.12);
  border-color: rgba(56, 189, 248, 0.25);
  color: #38bdf8;
  padding: 0.35rem 0.5rem;
}

.btn-circuit-export:hover {
  background: #0284c7;
  color: #ffffff;
}

.btn-circuit-delete {
  background: rgba(239, 68, 68, 0.12);
  border-color: rgba(239, 68, 68, 0.25);
  color: #f87171;
  padding: 0.35rem 0.5rem;
}

.btn-circuit-delete:hover {
  background: #dc2626;
  color: #ffffff;
}

.empty-circuits-notice {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 2rem 1rem;
  color: var(--text-muted);
  font-size: 0.9rem;
  text-align: center;
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-md);
}

/* Tooltip flotante de pieza al hover 3D */
.piece-tooltip {
  position: fixed;
  pointer-events: none;
  z-index: 30;
  background: rgba(15, 23, 42, 0.92);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(56, 189, 248, 0.3);
  color: #f1f5f9;
  font-family: var(--font-base);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.12s ease, transform 0.12s ease;
}

.piece-tooltip.visible {
  opacity: 1;
  transform: translateY(0);
}

/* HUD Divisor entre secciones */
.hud-divider {
  height: 1px;
  background: rgba(255, 255, 255, 0.08);
  margin: 0.15rem 0;
}

/* HUD valores secundarios con color más suave */
.hud-val-secondary {
  color: var(--accent-amber) !important;
  font-size: 0.75rem;
}

/* Animación de flash al capturar pantalla */
@keyframes screenshotFlash {
  0% { opacity: 0; }
  20% { opacity: 0.6; }
  100% { opacity: 0; }
}

.canvas-wrapper.screenshot-flash::after {
  content: '';
  position: absolute;
  inset: 0;
  background: white;
  animation: screenshotFlash 0.4s ease-out forwards;
  pointer-events: none;
  z-index: 15;
}

/* Responsividad Táctil Móvil */
@media (max-width: 768px) {
  .circuit-header-bar {
    flex-direction: column;
    align-items: stretch;
    gap: 0.85rem;
  }

  .circuit-tabs-nav {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    width: 100%;
  }

  .circuit-tabs-nav .tab-btn {
    width: 100%;
    justify-content: center;
    min-height: 42px;
  }

  .circuit-action-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .action-buttons-group {
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .btn-action-main {
    grid-column: span 2;
    justify-content: center;
    width: 100%;
  }

  .btn-action-sub {
    justify-content: center;
  }

  .action-settings-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    width: 100%;
  }

  .control-pill {
    flex-direction: column;
    align-items: flex-start;
  }

  .control-pill select {
    width: 100%;
    max-width: 100%;
    min-width: 0;
  }

  .toolbox-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .levels-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}