/* --------------------
   1) Estilos base modernos
-------------------- */

/* Quita margen/padding por defecto y usa caja ajustada */
* {
    box-sizing: border-box;
}

/* Ajustes generales de la página */
body {
    margin: 0;
    padding: 0;
    font-family: 'Inter', 'Roboto', sans-serif;
    background: linear-gradient(135deg, #FF6B35 0%, #D32F2F 50%, #FF8F00 100%);
    color: #333;
    min-height: 100vh;
    line-height: 1.6;
}

/* Contenedor principal con glassmorphism */
.main-container {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    margin: 20px;
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    border: 1px solid rgba(255, 255, 255, 0.18);
    overflow: hidden;
    min-height: calc(100vh - 40px);
}
  
/* --------------------
   2) Cabecera moderna
-------------------- */
.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.2), rgba(255, 255, 255, 0.1));
    backdrop-filter: blur(15px);
    padding: 1.5rem 2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    position: sticky;
    top: 0;
    z-index: 1000;
}

/* Logo/título del header */
.logo h1 {
    margin: 0;
    font-size: 1.8rem;
    font-weight: 700;
    color: #fff;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

/* Menú de navegación */
.navbar ul {
    list-style: none;
    display: flex;
    gap: 2rem;
    margin: 0;
    padding: 0;
}

.navbar li {
    margin: 0;
}

.navbar a {
    text-decoration: none;
    font-weight: 600;
    color: #fff;
    padding: 0.5rem 1rem;
    border-radius: 25px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.navbar a::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.navbar a:hover::before {
    left: 100%;
}

.navbar a:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}
/* Estilos para tipos de archivos */
.pdf, .nb, .book {
    list-style: none;
    background-repeat: no-repeat;
    background-position: left center;
    background-size: 24px 24px;
    padding: 0.8rem 0 0.8rem 40px;
    margin: 0.5rem 0;
    border-radius: 10px;
    background-color: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.pdf:hover, .nb:hover, .book:hover {
    background-color: rgba(255, 255, 255, 0.2);
    transform: translateX(10px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.pdf {
    background-image: url("../assets/icons/icon_pdf.png");
}

.nb {
    background-image: url("../assets/icons/icon_nb_mathematica.png");
}

.book {
    background-image: url("../assets/icons/book_icon.png");
}

.src {
    width: 100%;
    max-width: 600px;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease;
    margin: 1rem 0;
}

.src:hover {
    transform: scale(1.05);
}
/* Contenido principal moderno */
.recursividad-main {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 3rem;
}

/* Contenedor de archivos */
.files-container {
    flex: 1;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 2rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
}

/* Títulos de secciones */
.files-container h2 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    font-weight: 700;
    color: #fff;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    margin-top: 2rem;
}

.files-container h2:first-child {
    margin-top: 0;
}

.files-container ul {
    list-style: none;
    padding-left: 0;
    margin-bottom: 2rem;
}

.files-container li {
    margin-bottom: 0.8rem;
}

/* Enlaces dentro de los archivos */
.files-container a {
    text-decoration: none;
    color: #fff;
    font-weight: 500;
    transition: all 0.3s ease;
    display: block;
}

.files-container a:hover {
    color: #FF6B35;
}
  
/* --------------------
   4) Animación Recursiva moderna
-------------------- */
.recursion-animation {
    width: 300px;
    height: 300px;
    display: flex;
    justify-content: center;
    align-items: center;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    position: relative;
    overflow: hidden;
}

.recursion-animation::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: conic-gradient(from 0deg, transparent, rgba(255, 107, 53, 0.3), transparent);
    animation: rotateBackground 8s linear infinite;
}

/* Rotación infinita al icono */
.recursion-animation img {
    width: 80%;
    height: auto;
    animation: rotateRecursively 6s ease-in-out infinite;
    position: relative;
    z-index: 1;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.3));
}

/* Definimos los keyframes de las animaciones */
@keyframes rotateRecursively {
    0% {
        transform: rotate(0deg) scale(1);
    }
    25% {
        transform: rotate(90deg) scale(1.1);
    }
    50% {
        transform: rotate(180deg) scale(1.2);
    }
    75% {
        transform: rotate(270deg) scale(1.1);
    }
    100% {
        transform: rotate(360deg) scale(1);
    }
}

@keyframes rotateBackground {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}
  
/* --------------------
   5) Pie de página moderno
-------------------- */
.main-footer {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.05));
    backdrop-filter: blur(15px);
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding: 2rem;
    text-align: center;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
    margin-top: 3rem;
}
  
/* --------------------
   6) Media Queries responsivas
-------------------- */

/* Tablets grandes */
@media (max-width: 1024px) {
    .main-container {
        margin: 10px;
    }
    
    .recursividad-main {
        gap: 2rem;
    }
    
    .recursion-animation {
        width: 250px;
        height: 250px;
    }
}

/* Tablets */
@media (max-width: 900px) {
    .main-header {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
    }
    
    .navbar ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: 1rem;
    }
    
    .recursividad-main {
        flex-direction: column;
        align-items: center;
        padding: 1rem;
    }
    
    .files-container {
        width: 100%;
        margin-bottom: 2rem;
    }
    
    .recursion-animation {
        width: 220px;
        height: 220px;
    }
}

/* Móviles */
@media (max-width: 600px) {
    .main-container {
        margin: 5px;
        border-radius: 15px;
    }
    
    .main-header {
        padding: 1rem;
    }
    
    .logo h1 {
        font-size: 1.4rem;
    }
    
    .navbar ul {
        flex-direction: column;
        gap: 0.5rem;
        width: 100%;
    }
    
    .navbar a {
        font-size: 0.9rem;
        padding: 0.4rem 0.8rem;
    }
    
    .recursividad-main {
        padding: 1rem;
        margin: 1rem;
    }
    
    .files-container {
        padding: 1.5rem;
    }
    
    .files-container h2 {
        font-size: 1.5rem;
    }
    
    .recursion-animation {
        width: 180px;
        height: 180px;
    }
    
    .pdf, .nb, .book {
        background-size: 20px 20px;
        padding-left: 35px;
        font-size: 0.9rem;
    }
    
    .src {
        max-width: 100%;
    }
}

/* Móviles pequeños */
@media (max-width: 400px) {
    .logo h1 {
        font-size: 1.2rem;
    }
    
    .files-container {
        padding: 1rem;
    }
    
    .files-container h2 {
        font-size: 1.3rem;
    }
    
    .recursion-animation {
        width: 150px;
        height: 150px;
    }
}