/* Estilos base y variables */
:root {
  --primary-color: #4285f4;
  --primary-dark: #3367d6;
  --secondary-color: #34a853;
  --error-color: #ea4335;
  --warning-color: #fbbc05;
  --success-color: #34a853;
  --text-color: #202124;
  --light-gray: #f8f9fa;
  --medium-gray: #dadce0;
  --dark-gray: #5f6368;
  --border-color: #e0e0e0;
  --nav-height: 65px;
  --progress-color: var(--primary-color);
  --bmi-normal: #34a853;
  --bmi-overweight: #fbbc05;
  --bmi-obese: #ea4335;
  
  /* Variables para modo oscuro */
  --bg-color: #ffffff;
  --card-bg: #ffffff;
}

/* Estilos para modo oscuro */
.dark-mode {
  --bg-color: #121212;
  --text-color: #e0e0e0;
  --card-bg: #1e1e1e;
  --border-color: #333333;
  --light-gray: #2d2d2d;
  --medium-gray: #444444;
  --dark-gray: #a0a0a0;
}

/* Reset y estilos generales */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Roboto', 'Segoe UI', sans-serif;
}

body {
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--bg-color);
  padding: 20px 20px calc(20px + var(--nav-height));
  min-height: 100vh;
  transition: background-color 0.3s, color 0.3s;
}

/* Contenedores principales */
.container {
  background: var(--card-bg);
  padding: 20px;
  border-radius: 12px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
  margin-bottom: 20px;
  display: none;
  animation: fadeIn 0.3s ease;
  transition: background-color 0.3s, box-shadow 0.3s;
}

.container.active {
  display: block;
}

/* Barra de navegación - Estilos mejorados */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  background: var(--card-bg);
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
  height: var(--nav-height);
  z-index: 1000; /* Asegura que esté por encima de otros elementos */
  transition: all 0.3s ease;
}

.nav-btn {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  color: var(--dark-gray);
  font-size: 12px;
  padding: 5px;
  cursor: pointer;
  transition: all 0.3s;
  min-width: 60px; /* Ancho mínimo para cada botón */
}

.nav-btn.active {
  color: var(--primary-color);
  font-weight: bold;
}

.nav-btn .icon {
  font-size: 20px;
  margin-bottom: 3px;
  transition: transform 0.3s;
}

.nav-btn:hover .icon {
  transform: scale(1.1);
}

/* Resto de tus estilos existentes... */

/* Responsive - Asegurar visibilidad en móviles */
@media (max-width: 768px) {
  .bottom-nav {
    height: 60px;
  }
  
  .nav-btn .label {
    display: none;
  }
  
  .nav-btn .icon {
    font-size: 24px;
    margin-bottom: 0;
  }
}

@media (max-width: 480px) {
  .bottom-nav {
    height: 55px;
  }
  
  .nav-btn {
    padding: 2px;
  }
}

/* Animaciones */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Resto de tus estilos existentes... */

/* Estilos para modo oscuro */
.dark-mode {
  --bg-color: #121212;
  --text-color: #e0e0e0;
  --card-bg: #1e1e1e;
  --border-color: #333333;
  --light-gray: #2d2d2d;
  --medium-gray: #444444;
  --dark-gray: #a0a0a0;
}

/* Reset y estilos generales */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Roboto', 'Segoe UI', sans-serif;
}

body {
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--bg-color);
  padding: 20px 20px calc(20px + var(--nav-height));
  min-height: 100vh;
  transition: background-color 0.3s, color 0.3s;
}

/* Contenedores principales */
.container {
  background: var(--card-bg);
  padding: 20px;
  border-radius: 12px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
  margin-bottom: 20px;
  display: none;
  animation: fadeIn 0.3s ease;
  transition: background-color 0.3s, box-shadow 0.3s;
}

.container.active {
  display: block;
}

/* Tipografía */
h1, h2, h3, h4 {
  color: var(--primary-color);
  margin-bottom: 20px;
  text-align: center;
  font-weight: 500;
}

h2 {
  font-size: 1.5rem;
  border-bottom: 2px solid var(--light-gray);
  padding-bottom: 10px;
}

h3 {
  font-size: 1.3rem;
}

h4 {
  font-size: 1.1rem;
  text-align: left;
  margin-bottom: 10px;
}

/* Formularios y controles */
input, select {
  width: 100%;
  padding: 12px 15px;
  margin: 8px 0;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 16px;
  transition: border 0.3s;
  background-color: var(--card-bg);
  color: var(--text-color);
}

input:focus, select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(66, 133, 244, 0.2);
}

button {
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: 8px;
  padding: 12px;
  font-size: 16px;
  cursor: pointer;
  transition: all 0.3s;
  width: 100%;
  font-weight: 500;
}

button:hover {
  background-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

/* Componentes específicos */

/* Dashboard */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin: 20px 0;
}

.dashboard-card {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.05);
  text-align: center;
  transition: all 0.3s;
}

.dashboard-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.1);
}

.card-icon {
  font-size: 2.5rem;
  margin-bottom: 10px;
}

.card-value {
  font-size: 2rem;
  font-weight: bold;
  margin: 10px 0;
}

#current-weight {
  color: var(--primary-color);
}

#current-bmi.normal {
  color: var(--bmi-normal);
}

#current-bmi.overweight {
  color: var(--bmi-overweight);
}

#current-bmi.obese {
  color: var(--bmi-obese);
}

.card-subtext {
  color: var(--dark-gray);
  font-size: 0.9rem;
}

.trend-up {
  color: var(--error-color);
}

.trend-down {
  color: var(--success-color);
}

/* Barra de progreso */
progress {
  width: 100%;
  height: 8px;
  border-radius: 4px;
  margin-top: 10px;
  appearance: none;
}

progress::-webkit-progress-bar {
  background-color: var(--light-gray);
  border-radius: 4px;
}

progress::-webkit-progress-value {
  background-color: var(--progress-color);
  border-radius: 4px;
  transition: width 0.5s;
}

/* Gráficos */
.chart-container {
  position: relative;
  height: 300px;
  margin: 20px 0;
}

/* Sección de IA */
.ai-analysis {
  margin-top: 30px;
  background: var(--card-bg);
  padding: 20px;
  border-radius: 12px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.ai-card {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 20px;
  margin-top: 20px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
  border-left: 4px solid var(--primary-color);
}

.ai-metric {
  display: flex;
  justify-content: space-between;
  margin: 15px 0;
  font-size: 16px;
}

.ai-metric .label {
  color: var(--dark-gray);
  font-weight: 500;
}

.ai-metric .value {
  font-weight: bold;
}

.ai-metric .up {
  color: var(--error-color);
}

.ai-metric .down {
  color: var(--success-color);
}

.ai-recommendation {
  margin-top: 20px;
  padding-top: 15px;
  border-top: 1px solid var(--border-color);
}

.ai-recommendation p {
  background-color: var(--light-gray);
  padding: 12px;
  border-radius: 8px;
  font-size: 0.95rem;
}

/* Historial de pesos */
.weight-history {
  max-height: 60vh;
  overflow-y: auto;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 10px;
  background-color: var(--card-bg);
}

.weight-entry {
  display: flex;
  align-items: center;
  padding: 12px;
  margin: 5px 0;
  border-radius: 8px;
  transition: background-color 0.2s;
  justify-content: space-between;
}

.weight-entry:hover {
  background-color: var(--light-gray);
}

.weight-value {
  font-weight: bold;
  color: var(--primary-color);
  min-width: 70px;
}

.bmi {
  font-size: 0.85rem;
  padding: 3px 8px;
  border-radius: 12px;
  background-color: var(--light-gray);
  color: var(--dark-gray);
  margin: 0 10px;
}

.bmi.normal {
  background-color: rgba(52, 168, 83, 0.1);
  color: var(--bmi-normal);
}

.bmi.overweight {
  background-color: rgba(251, 188, 5, 0.1);
  color: var(--bmi-overweight);
}

.bmi.obese {
  background-color: rgba(234, 67, 53, 0.1);
  color: var(--bmi-obese);
}

.weight-date {
  color: var(--dark-gray);
  font-size: 0.9rem;
  min-width: 120px;
  text-align: right;
}

.entry-actions {
  display: flex;
  gap: 8px;
  margin-left: 10px;
}

.entry-actions button {
  width: auto;
  padding: 6px 10px;
  font-size: 14px;
  background: transparent;
  color: var(--dark-gray);
}

.entry-actions button:hover {
  background: var(--light-gray);
}

.weight-checkbox {
  margin-right: 10px;
}

/* Barra de navegación */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  background: var(--card-bg);
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
  height: var(--nav-height);
  z-index: 100;
}

.nav-btn {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  color: var(--dark-gray);
  font-size: 12px;
  padding: 5px;
  cursor: pointer;
  transition: all 0.3s;
}

.nav-btn.active {
  color: var(--primary-color);
  font-weight: bold;
}

.nav-btn .icon {
  font-size: 20px;
  margin-bottom: 3px;
}

/* Modales */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
}

.modal-content {
  background-color: var(--card-bg);
  margin: 10% auto;
  padding: 25px;
  border-radius: 12px;
  width: 90%;
  max-width: 400px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
  position: relative;
}

.close-modal {
  position: absolute;
  right: 15px;
  top: 10px;
  font-size: 24px;
  cursor: pointer;
  color: var(--dark-gray);
}

.confirm-buttons {
  display: flex;
  gap: 10px;
  margin-top: 20px;
}

.confirm-buttons button {
  flex: 1;
}

/* Estados especiales */
.danger-btn {
  background-color: var(--error-color);
}

.danger-btn:hover {
  background-color: #c5221f;
}

.success-btn {
  background-color: var(--success-color);
}

.success-btn:hover {
  background-color: #2d9246;
}

/* Animaciones */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

@keyframes fadeOut {
  from { opacity: 1; }
  to { opacity: 0; }
}

/* Notificaciones toast */
.toast {
  position: fixed;
  bottom: 20px;
  right: 20px;
  padding: 15px 25px;
  border-radius: 8px;
  color: white;
  z-index: 1000;
  animation: slideIn 0.3s ease-out;
  display: flex;
  align-items: center;
  gap: 10px;
}

.toast.success {
  background-color: var(--success-color);
}

.toast.error {
  background-color: var(--error-color);
}

.toast.warning {
  background-color: var(--warning-color);
}

.fade-out {
  animation: fadeOut 0.3s ease-out;
}

/* Selector de modelos IA */
.model-selector {
  margin: 15px 0;
}

.hint {
  font-size: 0.8rem;
  color: var(--dark-gray);
  margin-top: 5px;
}

/* Gráfico de predicciones */
#prediction-chart {
  margin-top: 20px;
  background: var(--light-gray);
  border-radius: 8px;
  padding: 10px;
}

/* Mensajes de estado */
.loading, .empty, .error {
  text-align: center;
  padding: 20px;
  color: var(--dark-gray);
}

.error {
  color: var(--error-color);
}

.error button {
  margin-top: 10px;
  background: var(--error-color);
}

/* Pestañas de tendencias */
.trend-tabs {
  display: flex;
  margin-bottom: 15px;
  border-bottom: 1px solid var(--border-color);
}

.trend-tab {
  padding: 8px 16px;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  color: var(--dark-gray);
  transition: all 0.3s;
  width: auto;
}

.trend-tab.active {
  border-bottom-color: var(--primary-color);
  color: var(--primary-color);
  font-weight: bold;
}

/* Sección de consejos */
.advice-categories {
  display: flex;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

.advice-category {
  padding: 8px 16px;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  color: var(--dark-gray);
  transition: all 0.3s;
  width: auto;
}

.advice-category.active {
  border-bottom-color: var(--primary-color);
  color: var(--primary-color);
  font-weight: bold;
}

.advice-list {
  list-style-type: none;
  padding: 0;
}

.advice-list li {
  padding: 10px;
  margin-bottom: 10px;
  background-color: var(--light-gray);
  border-radius: 8px;
}

/* Configuración - Estilos nuevos */
.settings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  margin: 20px 0;
}

.settings-card {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  transition: transform 0.3s, box-shadow 0.3s;
  border: 1px solid var(--border-color);
}

.settings-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.12);
}

.settings-card.danger-zone {
  border-left: 4px solid var(--error-color);
}

.settings-header {
  display: flex;
  align-items: center;
  margin-bottom: 15px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-color);
}

.settings-icon {
  font-size: 24px;
  margin-right: 10px;
  background: var(--primary-color);
  color: white;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.settings-card.danger-zone .settings-icon {
  background: var(--error-color);
}

.settings-content {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.setting-option {
  display: flex;
  flex-direction: column;
}

.switch-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  cursor: pointer;
}

.label-text {
  font-weight: 500;
  color: var(--text-color);
}

.radio-option {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  padding: 8px 0;
}

.radio-custom {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 2px solid var(--primary-color);
  position: relative;
}

.radio-option input:checked + .radio-custom::after {
  content: '';
  position: absolute;
  width: 10px;
  height: 10px;
  background: var(--primary-color);
  border-radius: 50%;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.color-themes {
  display: flex;
  gap: 10px;
  margin-top: 5px;
}

.color-option {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 2px solid var(--border-color);
  cursor: pointer;
  transition: transform 0.2s;
}

.color-option:hover {
  transform: scale(1.1);
}

.theme-primary {
  background: #4285f4;
}

.theme-secondary {
  background: #34a853;
}

.theme-tertiary {
  background: #fbbc05;
}

.settings-btn {
  width: 100%;
  padding: 12px;
  border-radius: 8px;
  border: none;
  background: var(--light-gray);
  color: var(--text-color);
  font-size: 16px;
  cursor: pointer;
  transition: all 0.3s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.settings-btn:hover {
  background: var(--medium-gray);
}

.danger-btn {
  background: rgba(234, 67, 53, 0.1);
  color: var(--error-color);
}

.danger-btn:hover {
  background: rgba(234, 67, 53, 0.2);
}

.settings-footer {
  display: flex;
  justify-content: space-between;
  margin-top: 30px;
  gap: 15px;
}

.primary-btn {
  background: var(--primary-color);
  color: white;
  flex: 1;
}

.secondary-btn {
  background: var(--light-gray);
  color: var(--text-color);
  flex: 1;
}

/* Form groups */
.form-group {
  margin-bottom: 15px;
}

.form-group label {
  display: block;
  margin-bottom: 5px;
  color: var(--dark-gray);
}

.radio-group {
  display: flex;
  gap: 15px;
  margin-top: 5px;
}

.radio-group label {
  display: flex;
  align-items: center;
  gap: 5px;
}

/* Quick actions */
.quick-actions {
  display: flex;
  gap: 10px;
  margin-top: 20px;
}

.quick-actions button {
  flex: 1;
}

/* History actions */
.history-actions {
  display: flex;
  gap: 10px;
  margin-bottom: 15px;
}

.history-actions button {
  flex: 1;
}

/* Input group */
.input-group {
  display: flex;
  gap: 10px;
}

.input-group input {
  flex: 1;
}

.input-group button {
  width: auto;
  min-width: 100px;
}

/* Responsive */
@media (max-width: 768px) {
  .dashboard-grid {
    grid-template-columns: 1fr 1fr;
  }

  .settings-grid {
    grid-template-columns: 1fr;
  }
  
  .settings-footer {
    flex-direction: column;
  }

  .container {
    padding: 15px;
  }

  .nav-btn .label {
    display: none;
  }

  .weight-entry {
    flex-wrap: wrap;
  }

  .weight-value, .bmi, .weight-date {
    margin: 5px 0;
  }
}

@media (max-width: 480px) {
  .dashboard-grid {
    grid-template-columns: 1fr;
  }

  body {
    padding: 10px 10px calc(10px + var(--nav-height));
  }

  .ai-metric {
    flex-direction: column;
  }

  .weight-entry {
    flex-direction: column;
    align-items: flex-start;
  }

  .entry-actions {
    align-self: flex-end;
    margin-top: 10px;
  }

  .quick-actions, .history-actions {
    flex-direction: column;
  }
  /* Reset de estilos para asegurar consistencia */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    color: #333;
}

/* Estilos del menú de navegación */
nav {
    background-color: #333;
    color: white;
    padding: 10px;
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: space-around;
}

nav ul li {
    position: relative;
}

nav ul li a {
    color: white;
    text-decoration: none;
    padding: 10px;
    display: block;
}

nav ul li:hover > ul {
    display: block;
}

/* Submenús */
nav ul ul {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: #444;
    list-style: none;
    padding: 0;
}

nav ul ul li {
    width: 150px;
}

nav ul ul li a {
    padding: 10px;
    display: block;
    color: white;
}

nav ul ul li a:hover {
    background-color: #555;
}

/* Asegurar que los menús sean visibles por defecto */
nav ul {
    display: block !important;
    visibility: visible !important;
    opacity: 1 !important;
}

/* Remover cualquier clase que oculte los menús */
.hidden, .menu-hidden {
    display: block !important;
    visibility: visible !important;
    opacity: 1 !important;
}

}