body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    padding: 20px;
    background-color: #f4f4f9;
    color: #333;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background-color: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #eee;
    padding-bottom: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap; /* Allow items to wrap on smaller screens */
}

h1 {
    color: #1a73e8;
    margin: 0;
    font-size: 1.8em;
}

.year-filter {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 5px 10px 20px 0; /* Provides spacing when header items wrap */
}

#year-select {
    padding: 8px;
    border-radius: 4px;
    border: 1px solid #ccc;
    font-size: 1rem;
    cursor: pointer;
}

.add-btn {
    display: inline-block;
    padding: 8px 16px;
    background-color: #1a73e8;
    color: white;
    text-decoration: none;
    border-radius: 4px;
    font-weight: bold;
    transition: background-color 0.2s;
}
.add-btn:hover {
    background-color: #155ab6;
}

#loading {
    text-align: center;
    padding: 20px;
    font-style: italic;
    color: #777;
}

#ppe-table {
    width: 100%;
    border-collapse: collapse;
}

#ppe-table thead {
    background-color: #333;
    color: #fff;
}

#ppe-table th, #ppe-table td {
    padding: 5px 15px;
    text-align: left;
    vertical-align: middle;
    border-bottom: 1px solid #ddd;
}

#ppe-table tr {
    cursor: pointer;
}

#ppe-list > tr > td:nth-child(4) {
    text-align: center;
}

#ppe-table tbody tr:hover {
    background-color: #f5f5f5;
}

.receipt-link img {
    max-width: 100px;
    border-radius: 4px;
    transition: transform 0.2s;
}

.receipt-link:hover img {
    transform: scale(1.05);
}

/* Form Styles */
.form-container {
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid #eee;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
    color: #555;
}

.form-group input {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box; /* Important for padding and width */
}

#ppe-form button {
    width: 100%;
    padding: 12px;
    background-color: #1a73e8;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1em;
    font-weight: bold;
}

#ppe-form button:hover {
    background-color: #155ab6;
}

/* Mobile-friendly adjustments */
@media (max-width: 600px) {
    body {
        padding: 10px;
    }
    .container {
        padding: 15px;
    }
    #ppe-table, #ppe-table thead, #ppe-table tbody, #ppe-table th, #ppe-table td, #ppe-table tr {
        display: block;
    }
    #ppe-table thead tr {
        position: absolute;
        top: -9999px;
        left: -9999px;
    }
    #ppe-table tr {
        border: 1px solid #ccc;
        margin-bottom: 10px;
    }
    #ppe-table td {
        border: none;
        border-bottom: 1px solid #eee;
        position: relative;
        text-align: left;
    }
    #ppe-table td:before {
        position: absolute;
        left: 6px;
        width: 45%;
        padding-right: 10px;
        white-space: nowrap;
        text-align: left;
        font-weight: normal;
        content: attr(data-label);
    }
    /* Center the receipt image on mobile for consistency */
    #ppe-table td[data-label="Receipt"] {
        text-align: center;
    }
}