/* ==========================================================================
   Variables y Estilos Globales
   ========================================================================== */
:root {
    --primary-color: #2e86a3;
    --secondary-color: #577590;
    --text-color: #444444;
    --background-color: #ffffff;
    --panel-background: #f5f5f5;
}

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

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #f0f0f0;
}

/* CORRECCIÓN IMÁGENES: Centrado automático */
img, video, svg {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 20px auto; /* Esto centra las imágenes vertical y horizontalmente */
}

/* ==========================================================================
   Encabezado y Navegación
   ========================================================================== */
header {
    background-color: var(--primary-color);
    padding: 1rem;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.mobile-menu-toggle {
    display: none;
    background: transparent;
    border: none;
    cursor: pointer;
}

.mobile-menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: #fff;
    margin: 5px 0;
    transition: 0.4s;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 20px;
}

nav ul li {
    position: relative;
}

nav ul li a {
    color: #fff;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.3s;
}

nav ul li a:hover {
    color: var(--panel-background);
}

.submenu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--panel-background);
    border-radius: 4px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    width: 250px;
    padding: 10px 0;
    z-index: 1001;
}

nav ul li:hover .submenu {
    display: block;
}

.submenu li {
    padding: 8px 15px;
}

.submenu li a {
    color: var(--text-color);
}

/* ==========================================================================
   Contenido Principal y Paneles
   ========================================================================== */
.admin-panel {
    margin-top: 80px;
    padding: 20px;
}

.login-container {
    max-width: 1200px;
    margin: 0 auto;
    background-color: #f3f4f6;
    padding: 2rem;
    border-radius: 0.5rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.router-login-box {
    text-align: center;
    background-color: #fff;
    color: var(--primary-color);
    padding: 30px;
    border-radius: 8px;
    margin: 20px 0;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    border: 2px solid var(--primary-color);
}

.router-login-box h2 {
    color: var(--primary-color);
    font-size: 1.8rem;
    margin-bottom: 20px;
    border-bottom: none;
}

.router-login-box .login-button {
    background-color: var(--primary-color);
    color: #fff;
    font-weight: 700;
    padding: 12px 24px;
    border-radius: 4px;
    text-decoration: none;
    display: inline-block;
    margin-top: 15px;
    transition: background-color 0.3s, transform 0.3s;
}

.router-login-box .login-button:hover {
    background-color: #236d85;
    transform: translateY(-2px);
}

/* ==========================================================================
   Botones y Elementos de UI
   ========================================================================== */
.login-button {
    display: inline-block;
    background-color: var(--secondary-color);
    color: #fff;
    padding: 12px 24px;
    text-decoration: none;
    border-radius: 4px;
    font-weight: 500;
    transition: background-color 0.3s, transform 0.3s;
}

.login-button:hover {
    background-color: #466380;
    transform: translateY(-2px);
}

.button-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin: 30px 0;
}

.panel-button {
    display: inline-block;
    background-color: var(--primary-color);
    color: #fff;
    padding: 15px 20px;
    text-decoration: none;
    border-radius: 4px;
    text-align: center;
    width: 100%;
    transition: background-color 0.3s, transform 0.3s;
}

.panel-button:hover {
    background-color: #236d85;
    transform: translateY(-2px);
}

/* ==========================================================================
   Tipografía y Estructura
   ========================================================================== */
h1, h2, h3, h4 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

h1 { font-size: 2.5rem; text-align: center; }
h2 { font-size: 2rem; border-bottom: 2px solid var(--primary-color); padding-bottom: 0.5rem; }
h3 { font-size: 1.5rem; }
p { margin-bottom: 1rem; }
.center { text-align: center; }

section {
    margin-bottom: 2rem;
    padding: 1rem;
    background-color: var(--panel-background);
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

ol, ul {
    margin-left: 2rem;
    margin-bottom: 1rem;
}

.columns {
    display: flex;
    gap: 2rem;
    margin-top: 2rem;
}

.column {
    flex: 1;
}

/* ==========================================================================
   TABLAS Y VIDEO (CORREGIDO PARA CENTRADO)
   ========================================================================== */

/* 1. Contenedor de la tabla */
.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: 20px auto; /* Centra el contenedor */
    border: 1px solid #ddd;
    border-radius: 4px;
    max-width: 100%;
}

/* 2. La tabla en sí */
table {
    width: 100%;
    border-collapse: collapse;
    background-color: #fff;
    margin: 0 auto; /* Asegura centrado */
}

/* 3. Celdas y Encabezados CENTRADOS */
th, td {
    padding: 12px 15px;
    text-align: center; /* Centra el texto dentro de las celdas */
    border: 1px solid #ddd;
}

th {
    background-color: var(--primary-color);
    color: #fff;
    font-weight: bold;
}

tr:nth-child(even) {
    background-color: #f9f9f9;
}

/* 4. Video Container (Respaldo para CSS) */
.video-container {
    width: 100%;
    max-width: 960px;
    margin: 20px auto;
    background: #000;
    border-radius: 8px;
    overflow: hidden;
    position: relative;
}

/* ==========================================================================
   Pie de Página
   ========================================================================== */
footer {
    background-color: var(--primary-color);
    color: #fff;
    padding: 20px;
    margin-top: 40px;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-nav ul {
    display: flex;
    gap: 20px;
    list-style: none;
}

.footer-nav a {
    color: #fff;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s;
}

.footer-nav a:hover {
    color: var(--panel-background);
}

/* ==========================================================================
   Media Queries (Móvil)
   ========================================================================== */
@media (max-width: 768px) {
    .header-content {
        flex-wrap: wrap; 
        align-items: center;
    }

    .mobile-menu-toggle {
        display: block;
        position: absolute;
        right: 1rem;
        top: 50%;
        transform: translateY(-50%);
    }

    .main-nav {
        display: none;
        width: 100%;
        margin-top: 1rem; 
    }

    .main-nav.active {
        display: block;
    }

    nav ul {
        flex-direction: column;
        width: 100%;
        background-color: var(--primary-color);
    }

    nav ul li {
        width: 100%;
        border-top: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    nav ul li a {
        display: block;
        padding: 15px;
    }

    .submenu {
        position: static;
        width: 100%;
        box-shadow: none;
        border-radius: 0;
        background-color: rgba(0, 0, 0, 0.1);
        padding-left: 15px;
        display: none;
    }

    nav ul li:hover .submenu {
        display: none;
    }

    nav ul li.active .submenu {
        display: block;
    }

    .footer-content {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }

    .footer-nav ul {
        flex-direction: column;
        gap: 10px;
    }

    .columns {
        flex-direction: column;
    }
    
    th, td {
        padding: 8px 5px;
        font-size: 14px;
    }
}

@media (max-width: 600px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
}