body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    color: #333;
    line-height: 1.6;
    overflow-x: hidden;
    background-color: #f0f2f5; 
}

.view {
    min-height: 100vh;
    width: 100%;
    display: none;
    flex-direction: column;
    align-items: center;
    box-sizing: border-box;
}

.view.active-view {
    display: flex;
}

#login-view {
    justify-content: center; 
    background-image: url('images/home_background.jpg');
    background-position: center;
}

.login-background-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6); 
    z-index: 1;
}

.login-container {
    position: relative;
    z-index: 2;
    background-color: rgba(255, 255, 255, 0.95);
    padding: 30px 40px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    text-align: center;
    width: 100%;
    max-width: 400px;
}

.login-logo {
    height: 80px;
    margin-bottom: 20px;
}

.login-container h2 {
    margin-top: 0;
    margin-bottom: 25px;
    color: #333;
    font-size: 1.8em;
}

.form-group {
    margin-bottom: 20px;
    text-align: left;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #555;
    font-weight: bold;
}

.form-group input[type="text"],
.form-group input[type="password"] {
    width: calc(100% - 20px);
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-size: 1em;
}

.login-btn {
    width: 100%;
    padding: 12px;
    font-size: 1.1em;
    cursor: pointer;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 5px;
    transition: background-color 0.3s ease;
    margin-top: 10px;
}

.login-btn:hover {
    background-color: #0056b3;
}

#login-error {
    margin-top: 15px;
    color: #d9534f; 
}

#app-header, #app-header-group {
    width: 100%;
    background-color: #fff; 
    padding: 10px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    box-sizing: border-box;
    position: sticky; 
    top: 0;
    z-index: 100; 
}

#header-logo, #header-logo-group {
    height: 50px; 
    display: block;
    margin-left: auto;
    margin-right: auto;
}

#logout-btn, #logout-btn-group {
    padding: 8px 15px;
    font-size: 0.9em;
    cursor: pointer;
    background-color: #dc3545; 
    color: white;
    border: none;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

#logout-btn:hover, #logout-btn-group:hover {
    background-color: #c82333;
}

#home-background-container {
    width: 100vw;
    height: 100vh;
    background-image: url('images/home_background.jpg');
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    display: flex;
    justify-content: center;
    align-items: center;
    box-sizing: border-box;
}


#home-main-content {
    text-align: center;
}

#home-group-buttons {
    display: flex;
    flex-direction: column;
    margin-left: -880px;
    align-items: center;
    background-color: rgba(255, 255, 255, 0.1);
    padding: 30px;
    border-radius: 50px;
}

.home-group-btn {
    padding: 5px 40px;
    margin-top: 30px;
    margin-bottom: 30px;
    font-size: 1.2em;
    cursor: pointer;
    background-color: #1b6f64; 
    color: #ffffff; 
    border: none;
    border-radius: 50px;
    transition: background-color 0.3s ease, color 0.3s ease, transform 0.2s ease;
    min-width: 100px;
    box-shadow: 0 4px 8px rgba(167, 182, 1, 0.359);
}

.home-group-btn:hover {
    background-color: #333333; 
    transform: translateY(-3px);
}


#app-header-group div { 
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}


#back-to-home-btn {
    position: absolute;  
    top: 20px;  
    left: 20px;   
    padding: 8px 15px;
    font-size: 0.9em;
    cursor: pointer;
    background-color: #0088ff;
    color: white;
    border: none;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

#back-to-home-btn:hover {
    background-color: #5a6268;
}

#group-page-title {
    font-size: 1.5em;
    margin: 0;
    color: #ff0000; 
    display: none;    
}


#group-background-container {
    width: 100%;
    flex-grow: 1;
    background-image: url('images/group_page_background.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    padding: 20px;
    box-sizing: border-box;
    display: flex; 
    justify-content: center;
    align-items: flex-start; 
}


#app-content-wrapper {
    background-color: rgba(255, 255, 255, 0.97); 
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 900px; 
}


.group-content h2 {
    color: #0b6761;
    border-bottom: 2px solid #1abc9c;
    padding-bottom: 10px;
    margin-bottom: 25px;
    font-size: 1.9em; 
    text-align: center;
}

.radio-buttons-container {
    display: grid;
    grid-template-columns: repeat(5, 1fr); 
    row-gap: 15px;
    column-gap: 100px; 
    margin-bottom: 25px;
    padding-bottom: 25px;
    border-bottom: 1px solid #eee;
}

.radio-item {    
    display: flex; 
    justify-content: center;
    align-items: center;
}

.radio-item input[type="radio"] {
    display: none;
}

.radio-item label {
    display: inline-block;
    padding: 10px 15px;
    width: 100px; 
    text-align: center;
    font-family: 'Times New Roman', Times, serif;
    font-size: 20px;
    border: 1px solid #d01616;
    border-radius: 50px; 
    cursor: pointer;
    background-color: #18767b;
    color: #ffffffff;
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
    box-sizing: border-box;
}


.radio-item input[type="radio"]:checked + label {
    background-color: #1abc9c;
    color: white;
    border-color: #16a085;
}

.radio-item label:hover {
    background-color: #e2e6ea;
}

.image-display-area {
    text-align: center; margin-top: 20px; min-height: 300px;
    border: 1px dashed #ddd; padding: 20px; background-color: #f9f9f9;
    border-radius: 5px;
}
.image-display-area img {
    max-width: 100%; height: auto; border-radius: 4px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.15);
}

.error-message { 
    color: #d9534f;
    font-weight: bold;    
}


@media (max-width: 850px) {    
    #app-header #header-logo, #app-header-group #header-logo-group {
        height: 40px;
    }
    #app-header .header-placeholder {
        width: 60px;
    }
    #app-header-group #back-to-home-btn, #app-header-group #logout-btn-group, #app-header #logout-btn {
        padding: 6px 10px;
        font-size: 0.8em;
    }

    #home-group-buttons {
        flex-direction: column;
        display: block;
        flex-direction: column;
        margin-top: -420px;
        align-items: center;
        background-color: rgba(255, 255, 255, 0.1);
        padding: 30px;
        border-radius: 50px;
    }
    .home-group-btn {
        min-width: 200px;
        margin: 10px 0; 
        padding: 5px 40px;
        margin-left: 30px;
        margin-right: 30px;
        font-size: 1.2em;
        cursor: pointer;
        background-color: #d01616; 
        color: #ffffff; 
        border: none;
        border-radius: 50px;
        transition: background-color 0.3s ease, color 0.3s ease, transform 0.2s ease;
        min-width: 100px;
        box-shadow: 0 4px 8px rgba(167, 182, 1, 0.359);
    }

    #group-page-dynamic-title {
        font-size: 1.5em;
    }
    #app-content-wrapper { padding: 15px; }

    .radio-buttons-container {
        grid-template-columns: repeat(auto-fit, minmax(60px, 1fr));
        gap: 8px;
    }
    .radio-item label {
        padding: 8px 10px;
        font-size: 0.9em;
    }
}
@media (max-width: 480px) {
     .radio-buttons-container {
        grid-template-columns: repeat(auto-fit, minmax(50px, 1fr));
    }
    #home-group-buttons {
        flex-direction: column;
        display: block;
        flex-direction: column;
        margin-top: -300px;
        align-items: center;
        background-color: rgba(255, 255, 255, 0.1);
        padding: 30px;
        border-radius: 50px;
    }
    .radio-item label {
        font-size: 0.8em;
        padding: 6px 8px;
    }
    .home-group-btn {       
        background-color: #d01616;         
    }
}