:root {
    --bg: #fff;
    --text: #696565;
    --primary: #4caf50;
    --header: #e0e0e0;
    --card: #f9f9f9;
}
body {
    background: var(--bg);
    color: var(--text);
    font-family: 'Segoe UI', Arial, sans-serif;
    margin: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}
header {
    background: var(--header);
    padding: 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
header h1 {
    margin: 0;
    font-size: 2rem;
}
nav a {
    margin: 0 0.5rem;
    text-decoration: none;
    color: var(--text);
    font-weight: bold;
}
#theme-toggle {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: #4caf50;
}
main {
    flex: 1;
    padding: 2rem;
}
footer {
    background: var(--header);
    text-align: center;
    padding: 1rem;
}
.item-list {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 1rem;
}
.item-card {
    background: var(--card);
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    padding: 1rem;
    min-width: 220px;
    flex: 1 1 220px;
}
.item-card h3 {
    margin-top: 0;
}
form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    max-width: 400px;
}
form input, form textarea {
    padding: 0.5rem;
    border: 1px solid #ccc;
    border-radius: 4px;
}
form button {
    background: var(--primary);
    color: #fff;
    border: none;
    padding: 0.75rem;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
}
form button:hover {
    background: #388e3c;
}

/* Dark theme */
body.dark {
    --bg: #181818;
    --text: #f1f1f1;
    --primary: #81c784;
    --header: #232323;
    --card: #222;
}