body {
    font-family: Arial, sans-serif;
    background: #f0f2f5;
    margin: 0;
    padding: 40px;
}
.container {
    background: #fff;
    padding: 30px;
    max-width: 900px;
    margin: auto;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
h2 {
    text-align: center;
}
form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}
textarea, input, select {
    width: 100%;
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 6px;
}
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 15px;
}
table th, table td {
    padding: 8px;
    border: 1px solid #ccc;
}
button {
    padding: 12px;
    background: #007BFF;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
}
button:hover {
    background: #0056b3;
}
a {
    text-decoration: none;
    color: #007BFF;
}
a:hover {
    text-decoration: underline;
}
.nav {
    text-align: center;
    margin-bottom: 20px;
}
.calendar {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 10px;
    margin-top: 30px;
}
.day {
    background: #e9ecef;
    border-radius: 6px;
    padding: 10px;
    text-align: center;
    min-height: 80px;
    cursor: pointer;
}
.day:hover {
    background: #d6d8db;
}
.workout-type {
    display: block;
    margin-top: 5px;
    font-weight: bold;
    color: #333;
}
.message {
    color: green;
    text-align: center;
}
.today {
    background: #cce5ff;
    border: 2px solid #007BFF;
}