body {
    background: #111;
    color: #fff;
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 40px;
}

h1 {
    font-size: 36px;
    font-weight: 900;
    letter-spacing: 2px;
}

h2 {
    font-size: 20px;
    color: #f0c040;
}

h3 {
    font-size: 24px;
    margin-top: 40px;
    border-bottom: 2px solid #f0c040;
    padding-bottom: 10px;
}

.checklist li {
    margin: 10px 0;
    font-size: 18px;
}

textarea {
    width: 100%;
    height: 80px;
    margin: 10px 0;
    background: #222;
    color: #fff;
    border: 1px solid #444;
    padding: 10px;
}

#calendar {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 8px;
    margin-top: 20px;
}

.day {
    background: #222;
    padding: 20px;
    text-align: center;
    cursor: pointer;
    border: 1px solid #333;
    font-weight: bold;
}

.green { background: #2ecc71; }
.blue { background: #3498db; }
.yellow { background: #f1c40f; }
.red { background: #e74c3c; }
.black { background: #000; }