/* Variables generales del proyecto */
:root {
    --color-primary: #111111;
    --color-secondary: #f0f0f0;
    --color-special: #ddb978;
    --color-alternative: #a0583a;
    --font-primary: 'Georgia', serif;
    --font-weight-bold: 600;
    --transition: all 0.3s ease;
    --box-shadow-sm: 0 2px 5px rgba(0,0,0,0.2);
    --box-shadow-md: 0 4px 8px rgba(0,0,0,0.3);
    --box-shadow-lg: 0 5px 15px rgba(0,0,0,0.1);
    --navbar-transition-duration: 0.3s;
}

/* Estilo para la selección de texto */
::selection {
    background-color: var(--color-special);
    color: var(--color-primary);
}
::-webkit-selection {
    background-color: var(--color-special);
    color: var(--color-primary);
}

/* Estilos generales */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: var(--font-primary);
}

body {
    color: var(--color-primary);
    overflow-x: hidden;
    background-color: #f2f2f2; /* Color de fondo general de la página */
}

/* Estilos para la barra de navegación */
.navbar {
    background-color: black;
    padding: 1rem 0;
    transition: background-color 0.3s ease;
    border-bottom: 1px solid var(--color-special);
    will-change: transform;
}

.navbar .container {
    padding: 0 10px;
    max-width: 98%;
}

.navbar-brand {
    color: var(--color-special);
    font-weight: var(--font-weight-bold);
    font-size: 1.5rem;
    transition: color 0.3s ease;
}

/* Estilo para el logo en la barra de navegación */
.navbar-logo {
    height: 80px;
    width: auto;
    transition: transform 0.3s ease;
    margin: -20px 0;
    will-change: transform;
}

.nav-link {
    color: var(--color-secondary);
    margin: 0 0.5rem;
    transition: color 0.3s ease;
    position: relative;
    padding: 5px 0;
}

.nav-link h4 {
    color: var(--color-secondary);
    margin: 0;
    font-size: 1rem;
    transition: color 0.3s ease;
}

.nav-link:hover h4 {
    color: var(--color-special);
}

.nav-link:visited h4,
.nav-link:focus h4 {
    color: var(--color-secondary);
}

.nav-link:hover h4,
.nav-link:visited:hover h4,
.nav-link:focus:hover h4 {
    color: var(--color-special);
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: var(--color-special);
    transition: width 0.3s ease;
}

.nav-link:hover {
    color: var(--color-special);
}

.nav-link:hover::after,
.nav-link:visited:hover::after,
.nav-link:focus:hover::after {
    width: 100%;
}

.nav-link:focus,
.nav-link:visited {
    color: var(--color-secondary);
}

.nav-link:hover,
.nav-link:visited:hover,
.nav-link:focus:hover {
    color: var(--color-special);
}

/* Botón especial */
.btn-special {
    background-color: var(--color-special);
    color: var(--color-primary);
    border: none;
    font-weight: var(--font-weight-bold);
    transition: background-color 0.3s ease, color 0.3s ease, transform 0.3s ease;
    border-radius: 30px;
    padding: 0.5rem 1.5rem;
}

.btn-special:hover {
    background-color: var(--color-alternative);
    color: var(--color-secondary);
    transform: translateY(-2px);
}

/* Secciones */
section {
    padding: 4rem 0;
    position: relative;
}

.bg-light {
    background-color: #e5e5e5 !important; /* Tono gris humo */
}

/* Footer */
footer {
    background-color: var(--color-primary);
    padding: 1.5rem 0;
    color: var(--color-secondary);
}

footer p {
    margin-bottom: 0;
}

.footer-content {
    padding: 10px 0;
}

/* Menú hamburguesa */
.navbar-toggler {
    padding: 0.25rem;
    cursor: pointer;
    transition: transform var(--navbar-transition-duration);
    outline: none !important;
    border: 1px solid var(--color-special) !important;
}
.navbar-toggler:focus {
    box-shadow: none !important;
}
.navbar-toggler:active {
    transform: scale(0.95);
}
.navbar-toggler-icon {
    will-change: background-image;
}

@media (max-width: 768px) {
    .navbar-collapse {
        background-color: rgba(0, 0, 0, 0.95);
        padding: 1rem;
        border-radius: 0.5rem;
        text-align: center;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        width: 100%;
        margin: 0 auto;
        max-width: 95%;
        opacity: 0;
        transform: translateY(-10px);
        transform-origin: top center;
        visibility: hidden;
        transition: opacity var(--navbar-transition-duration) cubic-bezier(0,0,0.2,1),
        transform var(--navbar-transition-duration) cubic-bezier(0,0,0.2,1);
        will-change: opacity, transform;
        z-index: 1030;
        pointer-events: none;
        -webkit-backface-visibility: hidden;
        backface-visibility: hidden;
        border: 1px solid var(--color-special);
    }
    
    .navbar-collapse.show {
        opacity: 1;
        transform: translateY(0);
        visibility: visible;
        pointer-events: auto;
    }
    
    .navbar-collapse.collapsing {
        transition-duration: 0s !important;
    }
    
    .navbar-nav {
        align-items: center;
    }
    
    .navbar-nav .nav-item {
        margin: 0.3rem 0;
    }
    
    .navbar-nav .nav-link {
        padding: 0.5rem 1rem;
        display: inline-block;
    }
}

/* Estilos para el botón de subir */
.btn-scroll-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--color-primary);
    color: var(--color-secondary);
    border: 1px solid var(--color-secondary);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    z-index: 1000;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--box-shadow-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    will-change: transform, opacity;
}

/* Animación de rebote durante el hover para dispositivos de escritorio */
@media (hover: hover) and (pointer: fine) {
    .btn-scroll-top:hover {
        animation: bounce 0.5s ease infinite;
        box-shadow: var(--box-shadow-md);
    }
}

/* Animación de rebote durante el scroll en dispositivos móviles */
@media (hover: none) and (pointer: coarse) {
    .btn-scroll-top.scrolling {
        animation: bounce 0.5s ease infinite;
        box-shadow: var(--box-shadow-md);
    }
}

.btn-scroll-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-5px);
    }
}

@keyframes fadeIn {
    from { 
        opacity: 0;
        transform: translateY(20px);
    }
    to { 
        opacity: 1;
        transform: translateY(0);
    }
}