:root {
    --bg: #f5f5f5;
    --text: #222;
    --card: white;
}

body.dark {
    --bg: #121212;
    --text: white;
    --card: #1e1e1e;
}

body {
    font-family: Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    margin: 0;
    padding: 0;
}

header {
    display: flex;
    justify-content: space-between;
    padding: 15px 20px;
    background: var(--card);
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

h1 {
    margin: 0;
}

main {
    padding: 20px;
    display: grid;
    gap: 20px;
}

section {
    background: var(--card);
    padding: 15px;
    border-radius: 10px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

input, select, button {
    padding: 8px;
    margin: 5px;
    border-radius: 5px;
    border: 1px solid #ccc;
}

button {
    background: #007bff;
    color: white;
    cursor: pointer;
    border: none;
}

button:hover {
    background: #0056b3;
}

ul {
    list-style: none;
    padding: 0;
}

li {
    display: flex;
    justify-content: space-between;
    padding: 8px;
    border-bottom: 1px solid #ccc;
}

.delete-btn {
    background: red;
    color: white;
    border: none;
    padding: 5px 8px;
    border-radius: 5px;
    cursor: pointer;
}
.delete-btn:hover {
    background: darkred;
}