/* ==========================================================================
   SISTEMA DE DISEÑO - TECHCHAT & ALPHAINSIT ACADEMY
   Hoja de Estilos Global (main.css)
   ========================================================================== */

:root {
  /* Brand Tokens Oficiales (TechChat · Alphainsit Academy) */
  --brand-primary:     #1D1E94; /* Índigo corporativo */
  --color-interactive: #0E9BB5; /* Cian interactivo */
  --color-danger:      #D93A2B; /* Rojo peligro / alerta */
  --neutral-200:       #D8D8DE; /* Gris borde secundario / botón secundario */
  
  /* Superficies y Neutrales */
  --ai-fog:            #F4F5FA; /* Fondo niebla */
  --color-bg:          var(--ai-fog);
  --color-surface:     #FFFFFF; /* Blanco */
  --color-border:      #E2E4F0;
  
  /* Texto */
  --brand-ink:         #1B1D3A; /* Tinta principal */
  --brand-muted:       #545454; /* Gris secundario */
  --color-text:        var(--brand-ink);
  --color-muted:       var(--brand-muted);

  /* Paleta térmica científica (diagramas y curvas) */
  --thermal-cold: #0B3D91; /* Azul profundo */
  --thermal-cool: #2E86DE; /* Azul medio */
  --thermal-mid:  #F5D547; /* Amarillo */
  --thermal-warm: #E8722C; /* Naranja */
  --thermal-hot:  #C0392B; /* Rojo */

  /* Mapeo clásico compatible */
  --color-primary: var(--brand-primary);

  /* Tipografía */
  --font-display: 'Montserrat', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Bordes y Sombras */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-card: 0 4px 16px rgba(27, 29, 58, 0.06);
  --transition: 0.25s ease;
}

/* --- Reseteo y Estilos Base --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-primary);
}

p {
  margin-bottom: 1rem;
}

a {
  color: var(--color-interactive);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-primary);
}

/* --- CABECERA GLOBAL HORIZONTAL (CINTILLO SUPERIOR) --- */
.app-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: #FFFFFF;
  border-bottom: 1.5px solid var(--neutral-200);
  width: 100%;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 10px 24px;
  height: 64px;
  box-shadow: 0 2px 8px rgba(27, 29, 58, 0.04);
}

.header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-right {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 16px;
}

.header-main-title {
  font-family: var(--font-display);
  font-weight: 800;
  color: var(--brand-primary);
  font-size: 1.35rem;
  text-align: center;
  margin: 0;
}

.logo-tc-svg {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  transition: transform var(--transition);
}

.logo-tc-svg:hover {
  transform: scale(1.05);
}

.brand-endorsement {
  font-size: 0.78rem;
  color: var(--color-muted);
}

.brand-endorsement strong {
  color: var(--brand-primary);
  font-weight: 700;
}

/* --- SIDEBAR REPOSITORIO DE TEMA --- */
#sidebar {
  width: 320px;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  position: fixed;
  top: 64px;
  bottom: 0;
  left: 0;
  display: flex;
  flex-direction: column;
  padding: 24px 18px;
  z-index: 100;
  overflow-y: auto;
  transition: transform 0.3s ease;
}

.brand-box {
  padding-bottom: 18px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 18px;
}

.brand-title {
  font-size: 1.15rem;
  color: var(--color-primary);
  line-height: 1.25;
  font-weight: 700;
}

.brand-subtitle {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-interactive);
  margin-top: 4px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.nav-btn {
  width: 100%;
  text-align: left;
  background: transparent;
  border: 1px solid transparent;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.84rem;
  color: var(--color-text);
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-btn:hover {
  background: rgba(14, 155, 181, 0.08);
  color: var(--color-interactive);
}

.nav-btn.active {
  background: var(--color-primary);
  color: var(--color-surface);
  box-shadow: 0 4px 12px rgba(29, 30, 148, 0.25);
}

.nav-btn .mod-num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  opacity: 0.85;
}

.sidebar-divider {
  height: 1px;
  background: var(--color-border);
  margin: 16px 0;
}

.sidebar-title {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
  padding-left: 6px;
}

/* --- CONTENIDO PRINCIPAL --- */
#main-content {
  margin-left: 320px;
  flex: 1;
  padding: 36px 44px;
  max-width: 1200px;
  transition: margin-left 0.2s ease, padding 0.2s ease;
}

.module-header {
  margin-bottom: 24px;
  border-bottom: 2px solid var(--color-border);
  padding-bottom: 12px;
}

.module-header h2 {
  font-size: 1.75rem;
  line-height: 1.3;
}

.module-header p {
  color: var(--color-muted);
  font-size: 0.98rem;
  margin-top: 4px;
}

/* --- TARJETAS Y COMPONENTES --- */
.thermo-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 26px;
  box-shadow: var(--shadow-card);
  margin-bottom: 24px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  margin-top: 16px;
}

.grid-dos-columnas {
  grid-template-columns: repeat(2, 1fr);
}

@media (max-width: 768px) {
  .grid-dos-columnas {
    grid-template-columns: 1fr;
  }
}

.formula-box {
  background: #ECEFF8;
  border-left: 4px solid var(--color-primary);
  padding: 14px 18px;
  margin: 16px 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 1rem;
}

.note-box {
  background: #EBF8FA;
  border-left: 4px solid var(--color-interactive);
  padding: 14px 18px;
  margin: 16px 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.92rem;
}

/* Badges */
.badge {
  display: inline-block;
  padding: 4px 10px;
  font-size: 0.72rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-primary { background: rgba(29, 30, 148, 0.1); color: var(--color-primary); }
.badge-interactive { background: rgba(14, 155, 181, 0.15); color: var(--color-interactive); }
.badge-danger { background: rgba(217, 58, 43, 0.15); color: var(--color-danger); }
.badge-success { background: rgba(16, 185, 129, 0.15); color: #10b981; }
.badge-warning { background: rgba(245, 158, 11, 0.15); color: #d97706; }

/* Botones técnicos */
.control-btn {
  background-color: var(--color-surface);
  border: 2px solid var(--color-interactive);
  color: var(--color-interactive);
  padding: 9px 16px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.88rem;
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font-body);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.control-btn:hover {
  background-color: var(--color-interactive);
  color: var(--color-surface);
}

.control-btn.active {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-surface);
}

.search-input {
  width: 100%;
  padding: 12px 18px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.95rem;
  margin-bottom: 20px;
  outline: none;
}

.search-input:focus {
  border-color: var(--color-interactive);
}

/* Acordeón */
.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  margin-bottom: 10px;
  overflow: hidden;
  background: var(--color-surface);
}

.faq-question {
  width: 100%;
  padding: 16px 20px;
  background: #FAFAFD;
  border: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--color-primary);
  text-align: left;
}

.faq-question:hover {
  background: #F0F2FA;
}

.faq-icon {
  font-size: 1.3rem;
  color: var(--color-interactive);
  transition: transform var(--transition);
}

.faq-answer {
  display: none;
  padding: 18px 20px;
  border-top: 1px solid var(--color-border);
  font-size: 0.9rem;
  background: var(--color-surface);
}

.faq-item.active .faq-answer {
  display: block;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
  color: var(--color-danger);
}

/* Banco de Opción Múltiple (autoevaluación con corrección automática) */
.mc-score-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 12px 18px;
  margin-bottom: 20px;
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-primary);
  font-size: 0.9rem;
}

.mc-group-title {
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-primary);
  margin: 28px 0 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-border);
}

.mc-group-title:first-child {
  margin-top: 0;
}

.mc-question {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 18px 20px;
  margin-bottom: 14px;
  background: var(--color-surface);
}

.mc-question-text {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
  line-height: 1.5;
}

.mc-options {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.mc-option {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  text-align: left;
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: var(--color-text);
  cursor: pointer;
  transition: all var(--transition);
}

.mc-option:hover:not(.mc-disabled) {
  border-color: var(--color-interactive);
  background: #EBF8FA;
}

.mc-option-key {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.76rem;
  color: var(--color-muted);
}

.mc-disabled {
  cursor: default;
}

.mc-option.mc-correct {
  border-color: var(--color-interactive);
  background: rgba(14, 155, 181, 0.08);
}

.mc-option.mc-correct .mc-option-key {
  background: var(--color-interactive);
  border-color: var(--color-interactive);
  color: #ffffff;
}

.mc-option.mc-incorrect {
  border-color: var(--color-danger);
  background: rgba(217, 58, 43, 0.06);
}

.mc-option.mc-incorrect .mc-option-key {
  background: var(--color-danger);
  border-color: var(--color-danger);
  color: #ffffff;
}

.mc-justification {
  margin-top: 12px;
  padding: 12px 16px;
  background: var(--color-bg);
  border-left: 3px solid var(--color-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.84rem;
  line-height: 1.55;
  color: var(--color-text);
}


/* Pioneros Históricos */
.pioneer-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-card);
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.pioneer-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(27, 29, 58, 0.12);
  border-color: var(--color-interactive);
}

.pioneer-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 8px;
}

.pioneer-avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid rgba(14, 155, 181, 0.2);
  background-color: var(--color-bg);
  flex-shrink: 0;
}

.pioneer-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.machine-schematic {
  background: #f1f5f9;
  padding: 8px 12px;
  border-radius: 6px;
  margin: 10px 0;
  border: 1px solid var(--color-border);
  font-size: 0.84rem;
  line-height: 1.45;
  color: var(--brand-ink);
}

.machine-schematic .katex {
  font-size: 0.95em;
}

/* Áreas de Aplicación */
.area-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 20px;
}

.area-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}

.area-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(27, 29, 58, 0.12);
  border-color: var(--color-interactive);
}

.area-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: 8px 8px 0 0;
  display: block;
}

.area-card-body {
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex-grow: 1;
}

.area-card-body h4 {
  font-size: 1.05rem;
  color: var(--color-primary);
  font-weight: 700;
}

.area-card-body p {
  font-size: 0.86rem;
  color: var(--color-muted);
  line-height: 1.5;
}

/* --- CATÁLOGO DE TEMAS (PORTADA) --- */
.catalog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  margin-top: 10px;
}

.catalog-card {
  background: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-card);
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 220px;
  cursor: pointer;
  position: relative;
}

.catalog-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(27, 29, 58, 0.12);
  border-color: var(--color-interactive);
}

.catalog-card.disabled {
  cursor: not-allowed;
  opacity: 0.85;
}

.catalog-card.disabled:hover {
  transform: none;
  box-shadow: var(--shadow-card);
  border-color: var(--color-border);
}

.catalog-card-num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-interactive);
  text-transform: uppercase;
}

.catalog-card-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--brand-primary);
  margin-top: 4px;
  margin-bottom: 8px;
  line-height: 1.3;
}

.catalog-card-desc {
  font-size: 0.84rem;
  color: var(--brand-muted);
  line-height: 1.45;
  flex-grow: 1;
}

.catalog-card-footer {
  margin-top: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* --- CONTENIDO PENDIENTE DE ANEXAR (figuras / enunciados suministrados por el usuario) --- */
.content-pending {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  border: 2px dashed var(--color-interactive);
  background: rgba(14, 155, 181, 0.06);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  margin: 18px 0;
}

.content-pending-icon {
  font-size: 1.5rem;
  line-height: 1;
  flex-shrink: 0;
}

.content-pending strong {
  display: block;
  color: var(--color-primary);
  font-size: 0.88rem;
  margin-bottom: 4px;
}

.content-pending p {
  font-size: 0.85rem;
  color: var(--color-muted);
  margin: 0;
  line-height: 1.55;
}

.content-pending code {
  font-family: var(--font-mono);
  background: #FFFFFF;
  border: 1px solid var(--color-border);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 0.82em;
  color: var(--color-primary);
}

/* --- TABLAS DE DATOS (propiedades termodinamicas) --- */
.table-scroll {
  overflow-x: auto;
  margin: 16px 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 0.83rem;
  min-width: 480px;
}

.data-table caption {
  caption-side: top;
  text-align: left;
  font-family: var(--font-body);
  font-weight: 700;
  color: var(--color-primary);
  padding: 10px 12px;
  font-size: 0.85rem;
  background: #FAFAFD;
  border-bottom: 1px solid var(--color-border);
}

.data-table th, .data-table td {
  padding: 7px 12px;
  text-align: center;
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}

.data-table thead th {
  background: var(--color-primary);
  color: #FFFFFF;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.data-table tbody tr:nth-child(even) { background: var(--color-bg); }
.data-table tbody tr:hover { background: rgba(14, 155, 181, 0.08); }
.data-table tbody tr.row-highlight { background: rgba(245, 213, 71, 0.25); font-weight: 700; }
.data-table tbody tr.row-ellipsis td { color: var(--color-muted); font-style: italic; }

/* --- DIAGRAMAS SVG INTEGRADOS --- */
.svg-diagram-box {
  background: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 1.25rem 0;
}

.svg-diagram-box svg {
  max-width: 100%;
  height: auto;
}

.svg-diagram-caption {
  margin-top: 0.75rem;
  font-size: 0.85rem;
  color: var(--color-muted);
  font-weight: 500;
  text-align: center;
}

/* --- RESPONSIVIDAD MEDIA QUERIES --- */
@media (max-width: 992px) {
  body {
    flex-direction: column;
  }
  #sidebar {
    width: 100%;
    position: relative;
    top: 0;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--color-border);
    transform: none !important;
  }
  #main-content {
    margin-left: 0;
    padding: 24px 16px;
  }
}