body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    background-color: #f0f2f5;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

#logout-btn {
    background-color: #dc3545;
    width: auto;
    padding: 10px 20px;
}

.search-container {
    margin-bottom: 20px;
}

#search-input {
    width: 100%;
    padding: 15px;
    font-size: 16px;
    border-radius: 5px;
    border: 1px solid #ddd;
}

.item-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
}

.item-card {
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
    padding: 20px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(.25,.8,.25,1);
}

.item-card:hover {
    box-shadow: 0 14px 28px rgba(0,0,0,0.25), 0 10px 10px rgba(0,0,0,0.22);
}

.fab-container {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 120px;
}
.fab {
    height: 60px;
    width: 60px;
    border-radius: 50%;
    background-color: #007bff;
    color: white;
    font-size: 24px;
    margin: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
    cursor: pointer;
    float: left;
}

.modal {
    display: none;
    position: fixed;
    z-index: 1;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.4);
}

.modal-content {
    background-color: #fefefe;
    margin: 15% auto;
    padding: 20px;
    border: 1px solid #888;
    width: 80%;
    max-width: 500px;
    border-radius: 8px;
}

.close-btn {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
}

.close-btn:hover,
.close-btn:focus {
    color: black;
    text-decoration: none;
    cursor: pointer;
}

/* Login Page */
.login-container {
    background-color: #fff;
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    width: 320px;
    margin: 100px auto;
    text-align: center;
}

input, textarea {
    width: 100%;
    padding: 12px;
    margin: 8px 0;
    box-sizing: border-box;
    border-radius: 5px;
    border: 1px solid #ccc;
}

button {
    width: 100%;
    padding: 12px;
    background-color: #007bff;
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
}

button:hover {
    background-color: #0056b3;
}

.error-message {
    color: red;
    margin-top: 10px;
}