/*
  ============================================
  --- VARIABLES GLOBALES (PALETA DE COLORES) ---
  ============================================
*/
:root {
  --primary-color: #ea4c89; /* Rosa principal de Dribbble */
  --primary-hover-color: #f072a7; /* Rosa más claro para hover */
  --background-color: #121212; /* Fondo oscuro principal */
  --card-bg-color: #1f1f1f; /* Fondo para tarjetas y formularios */
  --input-bg-color: #2a2a2a; /* Fondo para los campos de texto */
  --text-primary-color: #ffffff; /* Texto principal blanco */
  --text-secondary-color: #b3b3b3; /* Texto secundario grisáceo */
  --border-color: #3a3a3a; /* Color para bordes sutiles */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica,
    Arial, sans-serif;
  --border-radius: 10px; /* Bordes redondeados para todo */
}

/*
  ============================================
  --- ESTILOS GLOBALES Y RESET ---
  ============================================
*/
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family);
  background-color: var(--background-color);
  color: var(--text-primary-color);
  line-height: 1.6;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

/*
  ============================================
  --- ENCABEZADO Y NAVEGACIÓN ---
  ============================================
*/
.main-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background-color: var(--card-bg-color);
  border-bottom: 1px solid var(--border-color);
  position: sticky; /* Se mantiene fijo al hacer scroll */
  top: 0;
  z-index: 1000;
}

.logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--text-primary-color);
  text-decoration: none;
}

.main-nav a {
  color: var(--text-secondary-color);
  text-decoration: none;
  margin-left: 1.5rem;
  font-weight: 500;
  transition: color 0.2s ease-in-out;
}

.main-nav a:hover {
  color: var(--text-primary-color);
}

/* Estilos para el Menú Hamburguesa */
.hamburger-btn {
  display: none; /* Oculto en pantallas grandes */
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 1001;
}

.hamburger-btn .line {
  display: block;
  width: 25px;
  height: 3px;
  background-color: var(--text-primary-color);
  margin: 5px 0;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

/*
  ============================================
  --- FORMULARIOS (LOGIN Y REGISTRO) ---
  ============================================
*/
.form-card {
  background-color: var(--card-bg-color);
  padding: 2.5rem;
  border-radius: var(--border-radius);
  max-width: 450px;
  margin: 4rem auto;
  text-align: center;
}

.form-card h1 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.form-card p {
  color: var(--text-secondary-color);
  margin-bottom: 2rem;
}

.input-group {
  margin-bottom: 1.5rem;
  text-align: left;
}

.input-group label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.input-group input {
  width: 100%;
  padding: 1rem;
  background-color: var(--input-bg-color);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  color: var(--text-primary-color);
  font-size: 1rem;
}

.input-group input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(234, 76, 137, 0.2);
}

.register-link { /* NUEVO ESTILO */
  margin-top: 2rem;
  font-size: 0.9rem;
  color: var(--text-secondary-color);
}

.register-link a {
  color: var(--primary-color);
  font-weight: bold;
}

/*
  ============================================
  --- BOTONES ---
  ============================================
*/
.btn {
  display: block;
  width: 100%;
  padding: 1rem;
  border: none;
  border-radius: var(--border-radius);
  font-size: 1rem;
  font-weight: bold;
  cursor: pointer;
  text-align: center;
  text-decoration: none;
  transition: transform 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

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

.btn-secondary {
  background-color: var(--input-bg-color);
  color: var(--text-primary-color);
  margin-top: 1rem;
}

/*
  ============================================
  --- PÁGINA PRINCIPAL (TARJETAS DE JUEGO) ---
  ============================================
*/
.page-title {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.page-subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary-color);
  margin-bottom: 3rem;
}

.game-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.game-card {
  background-color: var(--card-bg-color);
  padding: 1.5rem;
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease-in-out, box-shadow 0.2s ease-in-out;
}

.game-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.game-card h3 {
  margin-bottom: 0.5rem;
}

.game-card p {
  color: var(--text-secondary-color);
  flex-grow: 1; /* Empuja el botón hacia abajo */
}

.game-card .btn {
  margin-top: 1.5rem;
}

/*
  ============================================
  --- PÁGINA DE COLOREAR ---
  ============================================
*/
.toolbar {
  background-color: var(--card-bg-color);
  padding: 1rem;
  border-radius: var(--border-radius);
  margin-bottom: 2rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 1.5rem;
}

.tool-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.tool-btn {
  background-color: var(--input-bg-color);
  color: var(--text-primary-color);
  border: 1px solid var(--border-color);
  padding: 0.5rem 1rem;
  cursor: pointer;
  border-radius: 8px;
  font-weight: 500;
  transition: background-color 0.2s ease;
}

.tool-btn:hover,
.tool-btn.active {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
}

.canvas-container {
  position: relative;
  width: 100%;
  max-width: 800px;
  aspect-ratio: 4 / 3;
  margin: 0 auto;
  touch-action: none; /* Previene el scroll en el canvas en móviles */
}

.canvas-container canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: var(--border-radius);
}

#backgroundCanvas {
    background-color: white;
}

/*
  ============================================
  --- DISEÑO RESPONSIVO (MÓVILES) ---
  ============================================
*/
@media (max-width: 768px) {
  .main-nav {
    display: none; /* Ocultamos la navegación por defecto en móvil */
    position: absolute;
    top: 68px; /* Altura del header */
    left: 0;
    width: 100%;
    background-color: var(--card-bg-color);
    flex-direction: column;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
  }

  .main-nav.is-open {
    display: flex; /* La mostramos cuando se presiona el botón */
  }

  .main-nav a {
    margin: 0;
    padding: 1rem 2rem;
    width: 100%;
  }

  .hamburger-btn {
    display: block; /* Mostramos el botón hamburguesa en móvil */
  }

  .container {
    padding: 1rem;
  }

  .form-card {
    margin: 2rem auto;
    padding: 1.5rem;
  }
}