* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.container {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    max-width: 500px;
    width: 100%;
    animation: fadeIn 0.6s ease-out;
}

@keyframes fadeIn {
    from {
    opacity: 0;
    transform: translateY(-20px);
    }
    to {
    opacity: 1;
    transform: translateY(0);
    }
}

h1 {
    color: #667eea;
    text-align: center;
    margin-bottom: 35px;
    font-size: 2em;
    font-weight: 600;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

.input-group {
    margin-bottom: 25px;
    position: relative;
}

label {
    display: block;
    color: #333;
    font-weight: 500;
    margin-bottom: 8px;
    font-size: 0.95em;
    letter-spacing: 0.3px;
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

input[type="number"] {
    width: 100%;
    padding: 15px 50px 15px 15px;
    border: 2px solid #e0e0e0;
    border-radius: 12px;
    font-size: 1.1em;
    transition: all 0.3s ease;
    background: #fff;
    color: #333;
}

input[type="number"]:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
    transform: translateY(-2px);
}

input[type="number"]:hover {
    border-color: #764ba2;
}

.unit {
    position: absolute;
    right: 15px;
    color: #667eea;
    font-weight: 600;
    font-size: 1em;
    pointer-events: none;
}

button {
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1.1em;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
    margin-top: 10px;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

button:active {
    transform: translateY(0);
    box-shadow: 0 2px 10px rgba(102, 126, 234, 0.4);
}

/* Ocultar las flechas de incremento/decremento en Chrome, Safari, Edge, Opera */
input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

/* Ocultar las flechas en Firefox */
input[type="number"] {
    -moz-appearance: textfield;
}

@media (max-width: 600px) {
    .container {
    padding: 30px 20px;
    }

    h1 {
    font-size: 1.6em;
    }

    input[type="number"] {
    font-size: 1em;
    padding: 12px 45px 12px 12px;
    }

    button {
    font-size: 1em;
    padding: 12px;
    }
}