/* --- RESET BÁSICO --- */
* {
    margin: 0; padding: 0; box-sizing: border-box;
    font-family: 'Segoe UI', system-ui, sans-serif;
}

/* =========================================
   PALETA DE COLORES (MODO CLARO)
   ========================================= */
:root {
    --color-primario: #055220;
    --color-oscuro: #1e293b; /* Para el footer */
    --texto-titulos: #1e293b; /* Separado para los h1 y h2 */
    --texto-oscuro: #334155; /* Texto de párrafos y enlaces */
    --blanco: #ffffff; /* Fondos de botones y tarjetas */
    --fondo-suave: #f8fafc; /* Fondo de la página y navbar */
    
    /* Sombras para los botones */
    --sombra-clara: #ffffff;
    --sombra-oscura: rgba(95, 157, 231, 0.48);
}

/* =========================================
   PALETA DE COLORES (MODO OSCURO - ESTILO GITHUB)
   ========================================= */
body.dark-mode {
    --color-primario: #2ea043; /* El verde característico de los botones de GitHub */
    --color-oscuro: #010409; /* Footer casi negro puro */
    --texto-titulos: #e6edf3; /* Blanco suave para títulos */
    --texto-oscuro: #8b949e; /* Gris tenue de GitHub para texto secundario */
    --blanco: #161b22; /* Fondo de tarjetas (un tono arriba del fondo general) */
    --fondo-suave: #0d1117; /* El fondo exacto de la página de GitHub */
    
    /* Sombras ajustadas para el fondo más oscuro */
    --sombra-clara: rgba(255, 255, 255, 0.01);
    --sombra-oscura: rgba(0, 0, 0, 0.6);
}

body {
    background-color: var(--fondo-suave);
    color: var(--texto-oscuro);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: background-color 0.3s ease, color 0.3s ease; /* Transición suave al cambiar de modo */
}

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

/* --- BARRA DE NAVEGACIÓN --- */
.navbar {
    display: flex; justify-content: space-between; align-items: center;
    padding: 15px 5%; 
    background-color: var(--fondo-suave); 
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    position: sticky; top: 0; z-index: 1000;
    transition: background-color 0.3s ease;
}

.logo { display: flex; align-items: center; gap: 10px; }
.img-logo { width: 40px; height: 40px; border-radius: 8px; background: #e2e8f0; object-fit: contain; }

.nav-links { list-style: none; display: flex; gap: 15px; align-items: center; }
.nav-auth { display: flex; gap: 15px; align-items: center; }

/* =========================================
   BOTONES ANIMADOS "ECO" (Estilo Uiverse)
   ========================================= */
.nav-btn-eco {
    position: relative;
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    text-decoration: none;
    padding: 0.6em 1.2em;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    border-radius: 6em;
    transition: all 0.2s;
    border: none;
    color: var(--texto-oscuro);
    background-color: var(--blanco);
    box-shadow: -4px -2px 16px 0px var(--sombra-clara), 4px 2px 16px 0px var(--sombra-oscura);
}

.nav-btn-eco i {
    font-size: 1.1rem;
}

.nav-btn-eco:hover {
    transform: translateY(-3px);
    box-shadow: -2px -1px 8px 0px var(--sombra-clara), 2px 1px 8px 0px var(--sombra-oscura);
    color: var(--color-primario);
}

.nav-btn-eco:active {
    transform: translateY(-1px);
    box-shadow: 0 5px 10px var(--sombra-oscura);
}

.nav-btn-eco::after {
    content: "";
    display: inline-block;
    height: 100%;
    width: 100%;
    border-radius: 100px;
    position: absolute;
    top: 0;
    left: 0;
    z-index: -1;
    transition: all 0.4s;
    background-color: var(--blanco);
}

.nav-btn-eco:hover::after {
    transform: scaleX(1.4) scaleY(1.6);
    opacity: 0;
}

/* Variante para el botón de Registro */
.nav-btn-eco.primary {
    background-color: var(--color-primario);
    color: var(--blanco);
}
.nav-btn-eco.primary::after {
    background-color: var(--color-primario);
}
.nav-btn-eco.primary:hover {
    color: var(--blanco);
}

/* Ajuste específico para el icono de 3 rayitas */
.menu-icon.nav-btn-eco {
    padding: 0.6em 1em;
}

/* --- CONTENIDO PRINCIPAL --- */
.main-content {
    flex: 1;
    padding: 60px 5%;
    text-align: center;
}

.main-content h1, .main-content h2 {
    color: var(--texto-titulos);
    margin-bottom: 20px;
    transition: color 0.3s ease;
}

/* Formularios */
form label {
    display: block;
    font-weight: bold;
    margin-bottom: 5px;
    color: var(--texto-oscuro);
}

form input:focus, form textarea:focus {
    outline: none;
    border-color: var(--color-primario) !important;
    box-shadow: 0 0 5px rgba(37, 99, 235, 0.3);
}

/* --- FOOTER --- */
.footer {
    background-color: var(--color-oscuro);
    color: #cbd5e1; padding: 40px 5% 20px; text-align: center;
    transition: background-color 0.3s ease;
}
.footer-container { margin-bottom: 20px; }
.footer-links-box a { color: #cbd5e1; text-decoration: none; margin: 0 10px; transition: 0.3s; }
.footer-links-box a:hover { color: var(--color-primario); }
.footer-bottom { border-top: 1px solid #334155; padding-top: 20px; font-size: 0.85rem; }

/* --- DISEÑO RESPONSIVE (CELULARES) --- */
@media (max-width: 768px) {
    .navbar { flex-direction: column; gap: 15px; padding: 20px; }
    .nav-links { flex-direction: column; text-align: center; gap: 15px; width: 100%; }
    .nav-auth { width: 100%; justify-content: center; }
}

/* =========================================
   MENÚ DESPLEGABLE (Estilo Uiverse)
   ========================================= */
.menu-container {
    position: relative;
    display: inline-block;
}

.menu-dropdown {
    display: none; 
    position: absolute;
    right: 0;
    top: calc(100% + 10px);
    background-color: #0D1117; 
    min-width: 220px;
    border-radius: 8px;
    z-index: 1000;
    box-shadow: 0 10px 25px rgba(0,0,0,0.3);
    border: 1px solid #30363d;
    padding: 10px;
    flex-direction: column;
    gap: 5px;
}

.menu-dropdown.show {
    display: flex;
}

.menu-header {
    color: #8b949e;
    font-size: 0.85rem;
    padding: 5px 10px 10px 10px;
    border-bottom: 1px solid #21262C;
    margin-bottom: 5px;
}
.menu-header strong {
    color: #e6edf3;
}

.menu-item {
    background-color: transparent;
    border: none;
    padding: 10px 12px;
    color: #e6edf3;
    display: flex;
    align-items: center;
    position: relative;
    gap: 12px;
    cursor: pointer;
    border-radius: 6px;
    text-decoration: none;
    font-size: 0.95rem;
    transition: background-color 0.2s;
}

.menu-item i {
    width: 20px;
    text-align: center;
    color: #7D8590;
    font-size: 1.1rem;
}

.menu-item:not(:active):hover,
.menu-item:focus {
    background-color: #21262C;
}

.menu-item:focus,
.menu-item:active {
    background-color: #1A1F24;
    outline: none;
}

.menu-item::before {
    content: "";
    position: absolute;
    top: 10%;
    left: -10px; 
    width: 4px;
    height: 80%;
    background-color: #2F81F7;
    border-radius: 0 5px 5px 0;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.menu-item:focus::before,
.menu-item:active::before,
.menu-item:hover::before {
    opacity: 1;
}

.menu-dropdown:hover > :not(.menu-item:hover):not(.menu-header) {
    transition: 300ms;
    filter: blur(1px);
    transform: scale(0.96, 0.96);
    opacity: 0.7;
}

.menu-item.logout {
    margin-top: 5px;
    border-top: 1px solid #21262C;
    border-radius: 0 0 6px 6px;
}
.menu-item.logout:hover {
    background-color: rgba(248, 81, 73, 0.1); 
}
.menu-item.logout i {
    color: #f85149;
}
.menu-item.logout:hover::before {
    background-color: #f85149; 
}

/* =========================================
   TOGGLE MODO OSCURO (Lógica Corregida)
   ========================================= */
.theme-toggle-container {
    justify-content: space-between;
    cursor: pointer;
}

.toggle-switch {
    position: relative;
    width: 50px;
    height: 26px;
    --light: #d8dbe0;
    --dark: #28292c;
    margin-right: 5px;
    pointer-events: none; 
}

.switch-label {
    position: absolute;
    width: 100%;
    height: 100%;
    background-color: var(--light); 
    border-radius: 13px;
    cursor: pointer;
    border: 2px solid var(--dark);
    overflow: hidden;
}

.checkbox {
    position: absolute;
    display: none;
}

.slider {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 13px;
    transition: 0.3s;
    background-color: var(--light); 
}

.checkbox:checked ~ .slider {
    background-color: var(--dark);
}

.slider::before {
    content: "";
    position: absolute;
    top: 3px;
    left: 4px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background-color: var(--dark); 
    box-shadow: none; 
    transition: 0.3s;
}

.checkbox:checked ~ .slider::before {
    transform: translateX(24px);
    background-color: transparent; 
    box-shadow: inset 6px -2px 0px 0px var(--light); 
}
.navbar-toggle {
    margin-right: 15px;
    /* Alineación vertical perfecta */
    display: flex;
    align-items: center;
}
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        padding: 15px;
    }
    .nav-links {
        margin-top: 15px;
        gap: 10px;
        flex-wrap: wrap;
        justify-content: center;
    }
}