/* Fuente amigable */
@import url('https://fonts.googleapis.com/css2?family=Comic+Neue:wght@700&family=Fredoka+One&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Fredoka+One&display=swap');

/* Siempre calcular bien el ancho */
* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    /* ❌ no forzar height:100% para no sumar con 100vh del contenedor */
    overflow-x: hidden; /* solo oculta scroll horizontal */
    font-family: 'Comic Neue', cursive;
    background: #fff8e1;
}

/* App Layout */
.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh; /* ocupa toda la pantalla */
    width: 100%;
    max-width: 100vw;
    overflow-x: hidden;
}

.app-header {
    background: linear-gradient(to right, #FF9A3D, #FFD93D);
    color: #333;
    padding: 12px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
    flex-shrink: 0; /* ✅ evita que empuje el contenido */
    width: 100%;
    max-width: 100vw;
    overflow-x: hidden;
}

.header-left {
    font-family: 'Fredoka One', cursive;
    font-size: 1.8em;
    display: flex;
    align-items: center;
    gap: 8px;
    color: #ff4081;
    text-shadow: 1px 1px #fff;
}

.header-right .header-about {
    background: linear-gradient(to right, #36D1DC, #5B86E5);
    color: white;
    padding: 8px 18px;
    border-radius: 20px;
    font-size: 1.1em;
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease;
}

    .header-right .header-about:hover {
        background: linear-gradient(to right, #5B86E5, #36D1DC);
        transform: scale(1.08);
    }

/* App Body */
.app-body {
    display: flex;
    flex: 1;
    position: relative;
    min-height: 0; /* ✅ crítico: permite que el hijo flex (sidebar/main) no desborde */
    width: 100%;
    max-width: 100vw;
    overflow-x: hidden;
}

/* Sidebar - escritorio */
.sidebar {
    background: linear-gradient(to bottom, #8E2DE2, #4A00E0);
    color: white;
    width: 240px;
    /* ❌ min-height:100vh causaba header + 100vh => scrollbar
       ✅ usar altura del contenedor flex (.app-body) */
    height: 100%;
    min-height: 0;
    padding: 15px;
    box-shadow: 2px 0 8px rgba(0,0,0,0.1);
    position: relative;
    z-index: 2000;
    transition: left .3s ease-in-out;
    flex-shrink: 0;
}

    .sidebar nav ul {
        list-style: none;
        padding: 0;
        margin: 0;
    }

        .sidebar nav ul li {
            margin: 10px 0;
        }

            /* Links de menú */
            .sidebar nav ul li a,
            .sidebar nav ul li .nav-link {
                display: flex;
                align-items: center;
                gap: 10px;
                font-size: 1.2em;
                font-weight: bold;
                padding: 12px 18px;
                border-radius: 12px;
                text-decoration: none;
                background: transparent;
                color: #fff !important; /* blanco siempre */
                transition: all 0.3s;
            }

                /* Activo */
                .sidebar nav ul li a.active,
                .sidebar nav ul li .nav-link.active {
                    background: #ff80ab !important;
                    color: #fff !important;
                    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
                }

                /* Hover */
                .sidebar nav ul li a:hover,
                .sidebar nav ul li .nav-link:hover {
                    background: #ffd54f !important;
                    color: #000 !important;
                    transform: scale(1.05);
                }

/* Main Content */
.main-content {
    flex: 1;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    /* ✅ evitar desbordes horizontales dentro del flex */
    min-width: 0;
    max-width: 100%;
    overflow-x: hidden;
}

/* Palabras */
.palabras-container {
    text-align: center;
    padding: 1rem;
    width: 100%;
    max-width: 900px;
}

.tarjeta-palabra {
    background: linear-gradient(180deg, #fff8b3, #ffd580);
    padding: 2rem;
    border-radius: 20px;
    margin: 1rem auto;
    width: 100%;
    max-width: 600px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    overflow-wrap: break-word; /* ✅ texto largo no empuja el ancho */
}

.imagen-palabra {
    max-width: 220px;
    margin: 1rem auto;
    display: block;
}

.tts-buttons {
    margin-top: 1rem;
}

.btn-tts {
    font-size: 1rem;
    padding: 0.8rem 1.5rem;
    margin: 0.3rem;
    border-radius: 15px;
    border: none;
    cursor: pointer;
    color: #fff;
}

.btn-es {
    background: linear-gradient(45deg, #ff6a00, #ff1493);
}

.btn-en {
    background: linear-gradient(45deg, #007bff, #00c6ff);
}

.btn-nav {
    background: linear-gradient(45deg, #28a745, #85e085);
    margin: 0.5rem;
    padding: 1rem 2rem;
    border-radius: 15px;
    border: none;
    color: white;
    font-weight: bold;
}

.progreso {
    margin: 0 1rem;
    font-size: 1rem;
}

/* Botón hamburguesa */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
    margin-left: 1rem;
}

    .hamburger span {
        width: 25px;
        height: 3px;
        background: #333;
        border-radius: 2px;
    }

/* Overlay */
.overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 1500;
}

    .overlay.show {
        display: block;
    }

/* RESPONSIVE */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        top: 0;
        left: -240px;
        width: 220px;
        /* ✅ en móvil, al ser fija, debe medir viewport real */
        height: 100dvh;
        min-height: 0;
        padding-top: 70px; /* espacio para el header si se superpone */
        overflow-y: auto;
    }

        .sidebar.open {
            left: 0;
        }

    .hamburger {
        display: flex;
    }

    /* Ocultar el botón "Acerca de" en móvil y cuando el menú esté abierto */
    .header-right {
        display: none;
    }

    .hide-on-mobile {
        display: none !important;
    }

    .main-content {
        padding: 1rem;
    }
}

@media (max-width: 480px) {
    .tarjeta-palabra {
        max-width: 320px;
        padding: 1rem;
    }

    .imagen-palabra {
        max-width: 120px;
    }

    .btn-tts, .btn-nav {
        font-size: 0.9rem;
        padding: 0.6rem 1rem;
    }
}

/* Bienvenida */
.bienvenida {
    text-align: center;
    margin: 2rem auto;
    padding: 2rem;
    max-width: 700px;
    border-radius: 20px;
    background: linear-gradient(180deg, #ffcc80, #ffb74d);
    box-shadow: 0 6px 18px rgba(0,0,0,0.25);
}

    .bienvenida h1 {
        font-family: 'Fredoka One', cursive;
        font-size: 2.2rem;
        margin-bottom: 1rem;
        color: #ff4081;
        text-shadow: 2px 2px #fff;
    }

    .bienvenida p {
        font-size: 1.2rem;
        margin: 0.8rem 0;
        line-height: 1.5;
    }

    .bienvenida .btn {
        background: linear-gradient(45deg, #ff4081, #ff80ab);
        color: #fff;
        font-size: 1.2rem;
        padding: 0.8rem 1.5rem;
        margin-top: 1.5rem;
        border: none;
        border-radius: 30px;
        box-shadow: 0 5px 12px rgba(0,0,0,0.3);
        cursor: pointer;
        transition: transform 0.2s ease;
    }

        .bienvenida .btn:hover {
            transform: scale(1.08);
        }