/* Estilos generales y variables (CSS3) */
:root {
    --color-primary: #007aff;          /* Azul (Generar) */
    --color-primary-dark: #0056b3;
    --color-secondary: #34c759;         /* Verde (Imprimir) */
    --color-secondary-dark: #2a9e46;
    
    /* --- NUEVAS VARIABLES DE COLOR --- */
    --color-download: #ffc107;         /* Amarillo (Descargar) */
    --color-download-dark: #e0a800;
    --color-copy: #dc3545;             /* Rojo (Copiar) */
    --color-copy-dark: #c82333;
    
    --color-light-gray: #f0f0f0;
    --color-text: #333;
    --color-background: #f4f7f6;
    --color-white: #ffffff;
    --border-radius: 8px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--color-background);
    color: var(--color-text);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 1rem;
    box-sizing: border-box;
}

.container {
    background-color: var(--color-white);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    width: 100%;
    max-width: 600px;
    text-align: center;
}

h1 {
    color: #1a1a1a;
    margin-top: 0;
    font-size: 1.75rem;
}

/* Área de entrada */
.input-area {
    margin-bottom: 2rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.input-area label {
    font-weight: 600;
    text-align: left;
    font-size: 0.9rem;
}

/* Wrapper para Input y Botón Limpiar */
.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

#texto-input {
    padding: 0.85rem;
    font-size: 1rem;
    border: 1px solid #ccc;
    border-radius: var(--border-radius);
    transition: border-color 0.2s, box-shadow 0.2s;
    width: 100%; 
    padding-right: 3rem; 
}

#texto-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0,122,255,0.2);
}

/* Estilo del Botón Limpiar */
.limpiar-btn {
    position: absolute;
    right: 0.5rem; 
    padding: 0.5rem;
    background-color: transparent;
    border: none;
    cursor: pointer;
    color: #888;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s, color 0.2s;
}

.limpiar-btn:hover {
    background-color: #f0f0f0;
    color: #333;
}

/* Botón principal de generar */
#generar-btn {
    padding: 0.85rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-white);
    background-color: var(--color-primary);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: background-color 0.2s ease;
}

#generar-btn:hover {
    background-color: var(--color-primary-dark);
}

/* Contenedor del código de barras */
.barcode-container {
    padding: 1.5rem;
    border: 1px dashed #ddd;
    border-radius: var(--border-radius);
    min-height: 150px;
    display: flex;
    justify-content: center;
    align-items: center;
    background: var(--color-white);
}

#barcode {
    width: 100%;
    height: auto;
    max-width: 100%;
}

/* Contenedor de Botones de Acción */
.action-buttons-container {
    margin-top: 1.5rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 0.75rem;
}

.action-buttons-container button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem;
    font-size: 0.95rem;
    font-weight: 600;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.1s ease;
}

.action-buttons-container button:active {
    transform: scale(0.98);
}

/* Botón Imprimir (Verde) */
.btn-primary {
    background-color: var(--color-secondary);
    color: var(--color-white);
}
.btn-primary:hover {
    background-color: var(--color-secondary-dark);
}

/* --- REGLAS DE COLOR ACTUALIZADAS --- */

/* Botón Descargar (Amarillo) */
.btn-download {
    background-color: var(--color-download);
    color: #333; /* Texto oscuro para fondo amarillo */
}
.btn-download:hover {
    background-color: var(--color-download-dark);
}

/* Botón Copiar (Rojo) */
.btn-copy {
    background-color: var(--color-copy);
    color: var(--color-white); /* Texto blanco para fondo rojo */
}
.btn-copy:hover {
    background-color: var(--color-copy-dark);
}
/* ------------------------------------- */


/* Mensaje Toast */
.toast {
    visibility: hidden;
    min-width: 250px;
    background-color: #333;
    color: #fff;
    text-align: center;
    border-radius: 6px;
    padding: 1rem;
    position: fixed;
    z-index: 10;
    left: 50%;
    transform: translateX(-50%);
    bottom: 30px;
    font-size: 1rem;
    opacity: 0;
    transition: visibility 0s 0.5s, opacity 0.5s linear, transform 0.5s ease;
}

.toast.show {
    visibility: visible;
    opacity: 1;
    transform: translateX(-50%) translateY(-10px);
    transition: opacity 0.5s linear, transform 0.5s ease;
}


/* Estilos de Impresión */
@media print {
    
    @page {
        margin: 0;
        size: auto;
    }

    body > *:not(.print-container) {
        display: none !important;
    }

    body {
        background-color: #fff;
        display: flex;
        justify-content: center;
        align-items: center;
        width: 100%;
        height: 100%;
        margin: 0;
        padding: 0;
    }

    .print-container {
        display: block !important;
        width: 90%; 
        margin: 0 auto;
    }

    .barcode-container {
        border: none;
        padding: 0;
        box-shadow: none;
    }

    #barcode {
        width: 100%;
        height: auto;
    }
}