body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #f5f5f5;
    color: #333;
}

header {
    background: #333;
    color: #fff;
    padding: 1rem;
}

header nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

a {
    color: #fff;
    text-decoration: none;
}

.login-container {
    max-width: 400px;
    margin: 2rem auto;
    padding: 2rem;
    background: #fff;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

.login-method {
    margin: 1rem 0;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.or {
    font-weight: bold;
}

.error {
    color: #ff0000;
    margin-bottom: 1rem;
}

.dashboard {
    max-width: 800px;
    margin: 2rem auto;
    padding: 2rem;
    background: #fff;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

.add-card {
    margin-bottom: 2rem;
}

.add-card textarea {
    width: 100%;
    min-height: 100px;
    padding: 0.5rem;
    margin-bottom: 1rem;
}

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1rem;
}

.card {
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 5px;
    padding: 1rem;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.card-content {
    margin-bottom: 1rem;
    white-space: pre-wrap;
}

.card-actions {
    display: flex;
    gap: 0.5rem;
}

button {
    padding: 0.5rem 1rem;
    background: #333;
    color: #fff;
    border: none;
    border-radius: 3px;
    cursor: pointer;
}

button:hover {
    background: #555;
}

.delete-btn {
    background: #cc0000;
}

.delete-btn:hover {
    background: #ff0000;
}