body {
    font-family: "Segoe UI", Arial, sans-serif;
    background: #f4f6f8;
    margin: 30px;
    color: #222;
}

h2 {
    margin-bottom: 15px;
}

.controls {
    margin-bottom: 15px;
}

button {
    background: #2f3b52;
    color: white;
    border: none;
    padding: 8px 14px;
    margin-right: 5px;
    border-radius: 6px;
    transition: 0.2s;
}

button:hover {
    background: #44516b;
}

table {
    border-collapse: collapse;
    width: 100%;
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

th {
    background: #2f3b52;
    color: white;
    text-align: left;
}

th, td {
    padding: 10px;
}

tr:nth-child(even) {
    background: #f9fafb;
}

input {
    width: 100%;
    padding: 6px;
    border: 1px solid #ccd2da;
    border-radius: 6px;
    background: #fdfdfd;
    box-sizing: border-box;
}

.index {
    color: #888;
    width: 40px;
}

input[type="checkbox"] {
    transform: scale(1.2);
}

.debts {
    background: #eef2f7;
    font-size: 0.9em;
    color: #333;
}

#count {
    margin-left: 10px;
    color: #555;
}

#toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: #2f3b52;
    color: white;
    padding: 10px 16px;
    border-radius: 8px;
    opacity: 0;
    transition: 0.3s;
}

#toast.show {
    opacity: 1;
}