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

body {
    font-family: Georgia, serif;
    background: url('logo.jpg') center top repeat;
    background-size: cover;
    min-height: 100vh;
    position: relative;
    color: #222;
}

.overlay {
    position: fixed;
    inset: 0;
    background: rgba(255, 255, 255, 0.90);
    z-index: 0;
}

.wrapper {
    position: relative;
    z-index: 2;
    max-width: 480px;
    margin: auto;
    padding: 20px 14px 50px;
}

.header {
    text-align: center;
    margin-bottom: 20px;
}

.logo {
    width: 100%;
    max-width: 340px;
}

.calculator-card {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 28px;
    padding: 28px 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

h1 {
    text-align: center;
    margin-bottom: 30px;
    font-size: 34px;
    color: #35543b;
}

.field {
    margin-bottom: 34px;
}

.field-top {
    display: flex;
    justify-content: space-between;
    margin-bottom: 12px;
    font-size: 18px;
}

.field-top span {
    color: #9a9a9a;
}

.input-box {
    display: flex;
    align-items: center;
    border: 2px solid #ececec;
    border-radius: 18px;
    padding: 16px 24px;
    background: white;
    margin-bottom: 12px;
}

.value-input {
    border: none;
    outline: none;
    font-size: 28px;
    font-family: Georgia, serif;
    text-align: center;
    width: 100%;
    background: transparent;
}

.currency {
    font-size: 28px;
    color: #222;
    margin-left: 4px;
    flex-shrink: 0;
}

.input-box > #monthsValue {
    width: 100%;
    text-align: center;
    font-size: 28px;
}

input[type=range] {
    width: 100%;
    accent-color: #5f7544;
}

.results {
    background: #f5f4ef;
    border-radius: 20px;
    padding: 24px;
}

.result-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 18px;
    font-size: 22px;
}

.result-row:last-child {
    margin-bottom: 0;
}

.result-row strong {
    color: #35543b;
}

.whatsapp-btn {
    display: block;
    margin-top: 24px;
    text-align: center;
    text-decoration: none;
    background: linear-gradient(90deg, #5f7544, #425c35);
    color: white;
    padding: 20px;
    border-radius: 18px;
    font-size: 24px;
}
.banner-bottom {
    position: relative;
    z-index: 2;
    width: 100%;
    margin: 30px auto 20px;
    padding: 0 14px;
    text-align: center;
}

.banner-bottom img {
    width:70%;
    max-width: 100%;
    border-radius: 16px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

@media(max-width: 480px) {
    h1 {
        font-size: 28px;
    }
    
    .value-input,
    .currency,
    .input-box > #monthsValue {
        font-size: 24px;
    }
    
    .result-row {
        font-size: 18px;
    }
    
    .whatsapp-btn {
        font-size: 20px;
    }
}