body {
    font-family: Arial, sans-serif;
    background-color: #000;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 800px;
    margin: 20px auto;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    padding: 20px;
}

h1 {
    margin-left: 10px;
    font-size: 32px;
}

h1 span a {
    text-decoration: none;
    color: #007bff;
}

h1 span a:hover {
    text-decoration: underline;
    color: #0056b3;
}

h2 {
    font-size: 24px;
    padding: 20px;
    background-color: #ddd;
    text-align: center;
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin: 5px 0;
    font-weight: bold;
}

.form-group input[type="number"],
.form-group input[type="date"],
.form-group input[type="text"],
.form-group input[type="number"] {
    width: calc(100% - 10px);
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 16px;
}

.form-group input[type="number"]:focus,
.form-group input[type="date"]:focus,
.form-group input[type="text"]:focus,
.form-group input[type="number"]:focus {
    outline: none;
    border-color: #007bff;
}

.form-group button {
    width: 100%;
    padding: 10px;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    background-color: #007bff;
    color: #fff;
    cursor: pointer;
    transition: background-color 0.3s, color 0.3s;
}

.form-group button:hover {
    background-color: #0056b3;
}

#selectYearBtn, #addActivityBtn {
    margin-top: 10px;
}

#selectedDates {
    margin-bottom: 20px;
}

.calendar-container {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 5px;
    border-top: 2px solid #007bff;
    margin-top: 20px;
    margin-bottom: 20px;
    margin-left: -15px !important;
}

.day-label {
    font-weight: bold;
    text-align: center;
    margin-top: 10px;
    margin-bottom: 5px;
    padding: 10px;
    color: #000;
    background-color: #0056b3; 
}

.day-label.weekend {
    background-color: #d7389a; 
}

.day {
    border: 1px solid #ccc;
    padding: 10px;
    background-color: #007bff; 
    color: #fff;
    text-align: center;
    position: relative;
}

.weekend {
    background-color: #ff69b4; 
}

.activity {
    font-size: 14px;
    color: #333; 
    margin-top: 5px;
    padding: 5px;
}

.delete-btn {
    background-color: #000;
    color: #ff0000;
    margin-left: 5px;
}

#pdfButton, #pdfButton2, #pdfButton3 {
    background-color: #009000;
    color: #fff;
    border: none;
    padding: 10px 20px;
    cursor: pointer;
    padding-left: 40px; 
    background-image: url('pdf.png'); 
    background-repeat: no-repeat;
    background-position: 10px center; 
    background-size: 20px 20px;
}

#pdfButton, #pdfButton2 {
    margin-right: 10px;
}

#pdfButton:hover, #pdfButton2:hover, #pdfButton3:hover {
    background-color: #006000; 
}

#pdfButton:active, #pdfButton2:active, #pdfButton3:active {
    background-color: #004000;
}

#pdfContainer, #pdfContainer2, #pdfContainer3 {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 9999;
}

#closeButton, #closeButton2, #closeButton3 {
    position: absolute;
    top: -20px;
    right: 10px;
    background-color: #ff0000;
    color: #fff;
    border: none;
    padding: 5px 10px;
    cursor: pointer;
    border-radius: 5px;
}

#closeButton:hover, #closeButton2:hover, #closeButton3:hover {
    background-color: #cc0000;
}

#download-pdf {
    background-color: #009000; 
    border: none; 
    color: white; 
    padding: 15px 32px; 
    text-align: center; 
    text-decoration: none; 
    font-size: 16px; 
    margin: 4px 2px; 
    cursor: pointer; 
    border-radius: 10px; 
    display: none;
}  

#download-pdf:hover {
    background-color: #006000;
}

#download-pdf:active {
    background-color: #004000;
}

#task-calendar {
    display: inline-block;
    padding: 20px;
    font-size: 20px;
    margin: 10px;
    background-color: #28a745;
    color: #fff;
}

#task-calendar:hover {
    background-color: #218838;
}

#clear-calendar-button {
    background-color: #ff0000;
    margin: 10px 0;
    display: none;
}

#clear-calendar-button:hover {
    background-color: #cc0000;
}

.activity-item {
    font-size: 14px;
    color: #333;
    margin-top: 5px;
    padding: 5px;
    background-color: #f7f7f7;
    border-radius: 4px;
    position: relative;
    cursor: pointer;
}

.activity-item.editable:hover {
    border: 1px solid #ccc;
    padding: 4px;
    background-color: #e0e0e0;
}

@media screen and (max-width: 768px) {
    #pdfObject, #pdfObject2, #pdfObject3 {
        width: 100vw; 
        height: 70vh; 
    }
}

@media screen and (min-width: 800px) {
    #pdfObject, #pdfObject2, #pdfObject3 {
        width: 800; 
        height: 600; 
    }
}

@media screen and (max-width: 768px) {
    #PDF {
        flex-direction: column;
    }
    #pdfButton, #pdfButton2 {
        margin-bottom: 10px;
        margin-right: 0;
    }
}

@media screen and (max-width: 768px) {
    .calendar-container {
        grid-template-columns: repeat(7, 1fr);
        gap: 2px;
    }

    .day-label,
    .day {
        font-size: 10px;
        padding: 4px;
        min-width: 45px;
    }

    .activity {
        font-size: 9px;
        padding: 2px;
    }

    .activity-item {
        padding: 2px 3px;
        font-size: 9px;
    }

    .delete-btn {
        padding: 2px 3px;
        font-size: 7px;
    }
}

@media screen and (max-width: 420px) {
    .calendar-container {
        grid-template-columns: repeat(7, 1fr);
        gap: 2px;
        max-width: 350px;
    }

    .day-label,
    .day {
        font-size: 9px;
        padding: 3px;
        min-width: 45px;
    }

    .activity {
        font-size: 8px;
        padding: 2px;
    }

    .activity-item {
        padding: 2px 3px;
        font-size: 8px;
    }

    .delete-btn {
        padding: 2px 3px;
        font-size: 6px;
    }
}