/* ==========================================================================
   Gimnasio de cálculo mental rápido y mnemotecnia - Estilos canónicos
   Fijate Tools - Responsive, Dark/Light Mode, Touch Numpad
   ========================================================================== */

:root {
  --bg-primary: #0f172a;
  --bg-card: #1e293b;
  --bg-card-hover: #334155;
  --bg-input: #0f172a;
  --border-color: #334155;
  --border-focus: #38bdf8;
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --accent-primary: #38bdf8;
  --accent-primary-hover: #0ea5e9;
  --accent-success: #10b981;
  --accent-warning: #f59e0b;
  --accent-danger: #ef4444;
  --numpad-btn-bg: #334155;
  --numpad-btn-hover: #475569;
  --numpad-btn-active: #0ea5e9;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-hover: #f1f5f9;
  --bg-input: #ffffff;
  --border-color: #e2e8f0;
  --border-focus: #0284c7;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --accent-primary: #0284c7;
  --accent-primary-hover: #0369a1;
  --accent-success: #10b981;
  --accent-warning: #d97706;
  --accent-danger: #dc2626;
  --numpad-btn-bg: #e2e8f0;
  --numpad-btn-hover: #cbd5e1;
  --numpad-btn-active: #0284c7;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: clip;
  width: 100%;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  color: var(--text-primary);
}

.mono {
  font-family: 'JetBrains Mono', monospace;
}

/* Layout */
.main-wrapper {
  flex: 1 0 auto;
  width: 100%;
}

.tool-layout {
  max-width: 1200px;
  margin: 1.5rem auto 3rem;
  padding: 0 1rem;
}

.tool-with-sidebar {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
}

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

/* Encabezado */
.intro-header {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.intro-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(56, 189, 248, 0.12);
  color: var(--accent-primary);
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  border: 1px solid rgba(56, 189, 248, 0.25);
}

.intro-title {
  font-size: 1.6rem;
  line-height: 1.25;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.intro-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  max-width: 800px;
}

/* Selector de modos de juego */
.game-modes-nav {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.5rem;
}

.game-mode-btn {
  height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.game-mode-btn:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
}

.game-mode-btn.active {
  background: var(--accent-primary);
  color: #ffffff;
  border-color: var(--accent-primary);
  box-shadow: 0 0 15px rgba(56, 189, 248, 0.3);
}

/* Tarjeta de teoría y trucos (Modo Práctica) */
.theory-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--accent-primary);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.theory-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.theory-title {
  font-size: 1.15rem;
  font-weight: 700;
}

.theory-select {
  height: 40px;
  padding: 0 35px 0 0.75rem;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background-color: var(--bg-input);
  color: var(--text-primary);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' 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 10px center;
  cursor: pointer;
}

.theory-trick {
  font-size: 0.95rem;
  color: var(--text-primary);
  line-height: 1.45;
}

.theory-example-box {
  background: var(--bg-primary);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.88rem;
  color: var(--accent-primary);
}

/* Área central de juego */
.game-card {
  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;
}

/* Barra superior HUD del juego */
.game-hud-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.75rem;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.hud-group {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.hud-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
}

.hud-pill .val {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  color: var(--accent-primary);
}

.lives-container {
  display: flex;
  gap: 0.25rem;
  font-size: 1.1rem;
}

.btn-icon-sound {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  padding: 0.3rem 0.6rem;
  font-size: 0.8rem;
  cursor: pointer;
}

.btn-icon-sound.is-muted {
  opacity: 0.6;
}

/* Pantalla del problema */
.prompt-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1.5rem 1rem;
  background: var(--bg-primary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  text-align: center;
  min-height: 160px;
}

.prompt-tag {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.math-prompt {
  font-family: 'JetBrains Mono', monospace;
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: 0.02em;
  margin-bottom: 0.5rem;
}

.btn-voice {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  height: 36px;
  padding: 0 0.85rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--accent-primary);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  margin-top: 0.5rem;
}

/* Display de respuesta del usuario */
.answer-box {
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0.5rem auto 0;
}

.answer-screen {
  min-width: 180px;
  height: 56px;
  background: var(--bg-input);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-muted);
  padding: 0 1rem;
  transition: border-color 0.2s;
}

.answer-screen.has-value {
  color: var(--accent-primary);
  border-color: var(--accent-primary);
}

/* Mensaje de feedback */
.feedback-msg {
  min-height: 24px;
  text-align: center;
  font-size: 0.95rem;
  font-weight: 600;
  transition: all 0.2s ease;
}

.feedback-msg.correct {
  color: var(--accent-success);
}

.feedback-msg.wrong {
  color: var(--accent-danger);
}

/* Teclado numérico en pantalla (Numpad) */
.numpad-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.65rem;
  max-width: 360px;
  margin: 0 auto;
  width: 100%;
}

.numpad-key {
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--numpad-btn-bg);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.4rem;
  font-weight: 700;
  cursor: pointer;
  user-select: none;
  transition: all 0.1s ease;
}

.numpad-key:hover {
  background: var(--numpad-btn-hover);
}

.numpad-key:active {
  background: var(--numpad-btn-active);
  color: #ffffff;
  transform: scale(0.96);
}

.numpad-key.key-action {
  font-size: 1.1rem;
  font-family: 'Outfit', sans-serif;
}

.numpad-key.key-clear {
  color: var(--accent-danger);
}

.numpad-key.key-enter {
  background: var(--accent-primary);
  color: #ffffff;
  border-color: var(--accent-primary);
}

.numpad-key.key-enter:hover {
  background: var(--accent-primary-hover);
}

/* Sección de Técnicas y Guía de Mnemotecnia */
.card-section {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.section-title {
  font-size: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.techniques-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}

.tech-item-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.1rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.tech-item-name {
  font-weight: 700;
  font-size: 1rem;
  color: var(--accent-primary);
}

.tech-item-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

.tech-item-ex {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* Modal de fin de partida */
.modal-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  z-index: 9999;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.modal-backdrop.active {
  display: flex;
}

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

.modal-trophy-icon {
  font-size: 3rem;
}

.modal-title {
  font-size: 1.6rem;
  font-weight: 800;
}

.modal-stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
}

.modal-stat-item {
  display: flex;
  flex-direction: column;
}

.modal-stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

.modal-stat-val {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--accent-primary);
}

.btn-primary-modal {
  height: 48px;
  background: var(--accent-primary);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.2s;
}

.btn-primary-modal:hover {
  background: var(--accent-primary-hover);
}

/* Responsivo */
@media (max-width: 600px) {
  .math-prompt {
    font-size: 2.2rem;
  }

  .game-modes-nav {
    grid-template-columns: 1fr 1fr;
  }

  .numpad-key {
    height: 48px;
    font-size: 1.25rem;
  }
}

/* Impresión */
@media print {
  header, footer, .game-modes-nav, .numpad-grid, .btn-voice, .game-hud-bar, .tool-ad-sidebar, .tools-ad-banner-section {
    display: none !important;
  }
}