:root {
    --primary-color: #003087;
    --secondary-color: #00a8e8;
    --background-color: #f5f5f5;
    --text-color: #333;
    --white: #ffffff;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

header {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 0px 0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.logo {
    max-width: 150px;
    height: auto;
}

h1,
h2 {
    color: var(--primary-color);
    margin-bottom: 20px;
}

h1,
h3 {
    color: var(--white);

}

.card {
    background-color: var(--white);
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    padding: 30px;
    margin-bottom: 20px;
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: 0 6px 8px rgba(0, 0, 0, 0.15);
}

.btn {
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    padding: 12px 20px;
    font-size: 16px;
    cursor: pointer;
    border-radius: 25px;
    transition: background-color 0.3s, transform 0.2s;
    text-decoration: none;
    display: inline-block;
    margin: 5px;
    text-align: center;
        min-width: 160px;
}

.btn:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
}

.btn:active {
    background-color: var(--secondary-color);
    transform: translateY(0);
}

.btn:disabled {
    background-color: #cccccc;
    cursor: not-allowed;
}

.btn.selected {
    background-color: var(--secondary-color);
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="file"] {
    width: 100%;
    padding: 12px;
    margin: 10px 0;
    border: 1px solid #ddd;
    border-radius: 4px;
    box-sizing: border-box;
    font-size: 16px;
}

.hidden {
    display: none;
}

#weightDisplay {
    font-size: 24px;
    font-weight: bold;
    margin: 20px 0;
    text-align: center;
}

footer {
    background-color: var(--primary-color);
    color: var(--white);
    text-align: center;
    padding: 20px 0;
    margin-top: 40px;
}

.slider-container-horizontal {
display: flex;
justify-content: space-around;
align-items: center;
width: 100%;
}

.slider-item {
display: flex;
flex-direction: column;
align-items: center;
width: 45%; 
}

.slider-item input[type="range"] {
width: 100%;
margin: 10px 0;
}


.button-group {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    margin: 20px 0;
}

.button-group label {
    width: 100%;
    margin-bottom: 10px;
    font-weight: bold;
}

#bed-preview {
    width: 300px;
    height: 150px;
    background-color: #e0e0e0;
    border: 2px solid var(--primary-color);
    margin: 20px auto;
    position: relative;
    overflow: hidden;
    border-radius: 10px;
}

#mattress {
    width: 100%;
    height: 100%;
    background-color: var(--white);
    position: absolute;
    transition: all 0.3s ease;
}

.pillow-controls {
display: flex;
align-items: center;
background-color: #e6f3ff;
padding: 20px;
border-radius: 8px;
margin-bottom: 20px;
justify-content: space-between;
}

.pillow-buttons-container {
display: flex;
flex-direction: column;
align-items: flex-start;
margin-right: 20px;
}

.pillow-buttons-container .btn {
margin: 5px 0;
width: 100px; 
height: 40px; 
display: flex;
align-items: center;
justify-content: center;
}

.center-container {
display: flex;
align-items: center;
justify-content: center;
flex-grow: 1; 
flex-direction: row;
}

#weightDisplay {
text-align: center;
margin-right: 20px;
}

#tareButton {
margin-left: 20px;
}



.measurement-buttons,
.download-buttons,
.preset-buttons,
.optional-pillow-buttons {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 20px;
}

.optional-pillow-buttons .btn {
    flex: 1;
    margin: 5px;
}

.progress-bar {
    width: 100%;
    height: 10px;
    background-color: #e0e0e0;
    border-radius: 5px;
    margin: 20px 0;
    overflow: hidden;
}

.progress {
    height: 100%;
    background-color: var(--secondary-color);
    width: 0;
    transition: width 0.5s ease;
}

#results-page {
    text-align: center;
}

#pillow-results {
    margin: 20px 0;
}

.pillow-result {
    background-color: #f0f8ff;
    border: 1px solid #b0d4ff;
    border-radius: 8px;
    padding: 15px;
    margin-bottom: 15px;
}

.pillow-result h3 {
    color: var(--primary-color);
    margin-top: 0;
}

.preset-buttons {
    display: flex;
    justify-content: space-around;
    margin: 20px 0;
}

.btn-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 10px 0;
}

.btn-group .btn {
    width: 100%;
    margin: 5px 0;
}

@media (min-width: 600px) {
    .btn-group {
        flex-direction: row;
        justify-content: space-between;
    }

    .btn-group .btn {
        width: auto;
    }
}