:root {
    --color-primary: #111111; 
    --color-secondary: #333333; 
    --color-background: #f4f7f6; 
    --color-text: #2c3e50;
}

body {
    font-family: 'Poppins', sans-serif;
    text-align: center;
    background: #f6f6f6;
    color: var(--color-text);
    min-height: 100vh;
    margin: 0;
    padding: 0; 
}

main {
    padding: 40px 0; 
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: calc(89vh - 100px); 
}

.contenedor {
    background-color: white;
    max-width: 600px;
    margin:80px 20px 0px 20px;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    box-sizing: border-box;
}

h1 {
    color: var(--color-primary);
    font-weight: 700;
    margin-bottom: 25px;
}

#imagenInput {
    display: none;
}

.file-label {
    display: inline-block;
    padding: 10px 20px;
    margin-bottom: 15px;
    background-color: var(--color-secondary);
    border-radius: 8px;
    cursor: pointer;
    color: white;
    transition: background-color 0.3s;
    text-decoration: none;
    border: 2px solid var(--color-secondary);
}
.file-label:hover {
    background-color: var(--color-primary);
    color: white;
}

button {
    background-color: var(--color-secondary);
    color: white;
    border: 2px solid var(--color-secondary);
    padding: 12px 30px;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s, border-color 0.3s;
    font-weight: 600;
}
button:hover {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    transform: scale(-10px);
}
button:disabled {
    background-color: #AAAAAA;
    border-color: #AAAAAA;
    cursor: not-allowed;
    transform: none;
}

#resultado {
    margin-top: 30px;
    padding: 20px;
    border: none;
    background-color: var(--color-background);
    border-radius: 10px;
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.05);
    display: inline-block;
    width: 100%;
    box-sizing: border-box;
    max-width: 350px;
}
#imagenOutput {
    max-width: 100% !important; 
    border-radius: 5px;
    height: auto;
}

#mensaje {
    margin-top: 15px;
    font-weight: 600;
    min-height: 20px;
    display: block; 
}

.spinner {
    border: 4px solid #f3f3f3; 
    border-top: 4px solid var(--color-primary); 
    border-radius: 50%; 
    width: 30px; 
    height: 30px; 
    animation: spin 1s linear infinite; 
    margin: 20px auto; 
    display: none; 
}

@keyframes spin { 
    0% { transform: rotate(0deg); } 
    100% { transform: rotate(360deg); } 
}