:root {
    --primary: #3695D3;
    --accent: #9CD2C6;
    --glass-bg: rgba(75, 93, 186, 0.85);
    --text-primary: #ffffff;
    --card-bg: rgba(255, 255, 255, 0.1);
    --footer-bg: rgba(75, 93, 186, 0.85);
    --bg-light: #ffffff;
    --text-dark: #000000;
    --dark-bg-color1: #1a1a2e;
    --dark-bg-color2: #16213e;
    --dark-bg-color3: #0f3460;
    --dark-bg-color4: #2d5595;
    --light-bg-color1: #e0f2f7;
    --light-bg-color2: #c8e8f2;
    --light-bg-color3: #b0e0e9;
    --light-bg-color4: #98d8e0;
}

html, body {
    height: 100%;
    margin: 0;
    font-family: "Poppins", sans-serif;
    color: var(--text-primary);
    background: linear-gradient(-45deg, var(--dark-bg-color1), var(--dark-bg-color2), var(--dark-bg-color3), var(--dark-bg-color4));
    background-size: 400% 400%;
    animation: gradient 15s ease infinite;
    overflow: hidden;
    transition: all 1s ease;
}
body.fade-transition { transition: all 1s ease; }
@keyframes gradient { 0% { background-position: 0% 50%; } 50% { background-position: 100% 50%; } 100% { background-position: 0% 50%; } }

/* MENU LATERAL GENERAL */
#sidebar {
    width: 260px;
    background: var(--glass-bg);
    backdrop-filter: blur(6px);
    padding: 80px 20px 40px;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
   
    overflow-y: auto;
    z-index: 1000;
    transition: transform 0.7s cubic-bezier(0.68, -0.55, 0.27, 1.55);
}
#sidebar ul { list-style: none; padding: 0; margin: 0; }
#sidebar li { margin-bottom: 12px; }

/* Estilos base de los enlaces del sidebar (modo oscuro) */
#sidebar a {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    padding: 12px 18px;
    border-radius: 30px;
    font-weight: 500;
    transition: all 0.5s ease;
    color: var(--text-primary);
    cursor: pointer;
    background: var(--card-bg);
}
#sidebar a:hover {
    background: var(--accent);
    color: var(--text-dark);
    transform: translateX(5px);
    text-shadow: 0 0 12px var(--accent), 0 0 20px var(--accent);
    box-shadow: 0 0 10px var(--accent), 0 0 20px var(--accent);
}
#sidebar a.programacion-btn {
    background: var(--accent);
    color: var(--text-dark);
    font-weight: bold;
}
#sidebar a.programacion-btn:hover {
    background: #4B5DBA;
    color: #fff;
}

/* Redes Sociales */
.social-links-container { display: flex; justify-content: space-around; gap: 8px; margin-top: 12px; }
.social-links-container a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    font-size: 2rem;
    color: var(--text-primary);
    background: var(--card-bg);
    transition: all 0.5s ease;
    text-decoration: none;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}
.social-links-container a:hover {
    background: var(--accent);
    color: var(--text-dark);
    transform: scale(1.1);
    box-shadow: 0 0 10px var(--accent), 0 0 20px var(--accent);
    text-shadow: none;
}

/* HAMBURGER */
.hamburger {
    position: fixed;
    top: 16px;
    left: 16px;
    z-index: 1001;
    font-size: 2rem;
    color: #ffffff;
    cursor: pointer;
    background: rgba(0, 0, 0, 0.4);
    border-radius: 8px;
    padding: 5px 10px;
    transition: all 0.5s ease-in-out;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
}
.hamburger:hover {
    background: var(--accent);
    color: var(--text-dark);
    box-shadow: 0 0 20px var(--accent);
}
@media (max-width: 991.98px) {
    .hamburger { display: block; }
    #sidebar { transform: translateX(-100%); }
    #sidebar.open { transform: translateX(0); }
    main { margin-left: 0 !important; }
}
@media (min-width: 992px) { .hamburger { display: none; } }

/* TEMA */
#theme-toggle {
    position: fixed;
    top: 16px;
    right: 16px;
    z-index: 1002;
    background: rgba(0, 0, 0, 0.4);
    color: #ffffff;
    border: none;
    padding: 8px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.5s ease-in-out;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
}
#theme-toggle:hover {
    background: var(--accent);
    color: var(--text-dark);
    box-shadow: 0 0 20px var(--accent), 0 0 30px var(--accent);
}

/* MAIN */
main {
    margin-left: 260px;
    height: 100%;
    display: flex;
    flex-direction: column;

}
.hero {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 0 20px;
    text-align: center;
    color: var(--text-primary);
    transition: all 1s ease;
}
.hero h1 {
    font-size: 2.5rem;
    margin: 0;
    color: var(--text-primary);
    text-shadow: 2px 2px 6px rgba(0, 0, 0, 0.7);
    transition: all 1s ease;
}
#player-container {
    width: 100%;
    max-width: 1280px;
    aspect-ratio: 16/9;
    background: rgba(0, 0, 0, 0.4);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.6);
    margin-top: 20px;
    transition: all 1s ease;
}
/* Estilos para el reproductor en sí, para que se adapte al contenedor */
#player {
    width: 100%;
    height: 100%;
}

/* FOOTER */
footer {
    text-align: center;
    padding: 20px 10px;
    background: var(--footer-bg);
    backdrop-filter: blur(6px);
    font-size: 0.9rem;
    color: var(--text-primary);
    flex-shrink: 0;
    transition: all 1s ease;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.3);
}
footer .bar { display: inline; color: var(--accent); }
footer .footer-line1, footer .footer-line2 { display: inline; }
@media (max-width: 576px) {
    footer .footer-line1, footer .footer-line2 { display: block; }
    footer .bar { display: none; }
}

/* Modal */
.modal-dialog { max-width: 900px; margin: 1.75rem auto; }
@media (max-width: 768px) { .modal-dialog { max-width: 95%; } }
.modal-content { position: relative; }
.modal-body {
    overflow-y: scroll;
    -ms-overflow-style: none; /* IE and Edge */
    scrollbar-width: none; /* Firefox */
}
.modal-body::-webkit-scrollbar {
    display: none; /* Chrome, Safari, Opera*/
}

/* Estilos del botón de cerrar MEJORADOS */
.close-btn {
    position: absolute;
    top: 15px;
    right: 15px;
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.2);
    font-size: 24px;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
    z-index: 1050;
    display: flex;
    align-items: center;
    justify-content: center;
}

.close-btn i { color: #333; }
.close-btn:hover {
    background: #e63946;
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    transform: rotate(90deg);
}
.close-btn:hover i { color: #fff; }

/* Ajustes del botón de cerrar para pantallas pequeñas */
@media (max-width: 576px) {
    .close-btn {
        top: 10px;
        right: 10px;
        width: 35px;
        height: 35px;
        font-size: 20px;
    }
}

/* MODO CLARO (sobreescribe estilos del modo oscuro) */
body.light-mode {
    --text-primary: #23005c;
    background: linear-gradient(-45deg, var(--light-bg-color1), var(--light-bg-color2), var(--light-bg-color3), var(--light-bg-color4));
    background-size: 400% 400%;
    animation: gradient-light 15s ease infinite;
}
@keyframes gradient-light { 0% { background-position: 0% 50%; } 50% { background-position: 100% 50%; } 100% { background-position: 0% 50%; } }

/* Estilos del menú y botones en modo claro */
body.light-mode #sidebar { background: rgba(189, 222, 237, 0.85); }
body.light-mode #sidebar a {
    color: var(--text-dark);
    background: rgba(255, 255, 255, 0.7);
}
body.light-mode #sidebar a:hover {
    background: var(--primary);
    color: #fff !important;
    box-shadow: 0 0 10px var(--primary), 0 0 20px var(--primary);
}
body.light-mode #sidebar a.programacion-btn {
    background: var(--accent);
    color: var(--text-dark) !important;
}
body.light-mode #sidebar a.programacion-btn:hover {
    background: var(--primary);
    color: #fff !important;
}
body.light-mode .social-links-container a {
    color: var(--text-dark);
    background: rgba(255, 255, 255, 0.7);
}
body.light-mode .social-links-container a:hover {
    background: var(--primary);
    color: #fff !important;
}
body.light-mode .hamburger {
    color: var(--text-dark);
    background: rgba(0, 0, 0, 0.1);
}
body.light-mode .hamburger:hover {
    background: var(--primary);
    color: var(--text-primary);
    box-shadow: 0 0 20px var(--primary);
}
body.light-mode #theme-toggle {
    color: var(--text-dark);
    background: rgba(0, 0, 0, 0.1);
}
body.light-mode #theme-toggle:hover {
    background: var(--primary);
    color: var(--text-primary);
    box-shadow: 0 0 20px var(--primary);
}
body.light-mode .hero h1 { color: #23005c; text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.2); }
body.light-mode #player-container { background: rgba(0, 0, 0, 0.1); }

/* Regla para el footer en modo claro */
body.light-mode footer {
    background: var(--primary);
    color: #fff;
}

/* Animaciones del modal */
@keyframes fadeInZoomSlide { 0% { opacity: 0; transform: translateX(-50px) scale(0.8); } 100% { opacity: 1; transform: translateX(0) scale(1); } }
@keyframes fadeOutZoomSlide { 0% { opacity: 1; transform: translateX(0) scale(1); } 100% { opacity: 0; transform: translateX(-50px) scale(0.8); } }
.modal.fade .modal-dialog { transition: none; transform: none; opacity: 1; }
.modal-anim-in .modal-dialog { animation: fadeInZoomSlide 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards; }
.modal-anim-out .modal-dialog { animation: fadeOutZoomSlide 0.5s cubic-bezier(0.55, 0.085, 0.68, 0.53) forwards; }
.modal:not(.modal-anim-in):not(.modal-anim-out) .modal-dialog { opacity: 0; transform: translateX(-50px) scale(0.8); }