body {
    font-family: Arial, sans-serif;
    background: #f2f4f8;
    padding: 20px;
}

.container {
    max-width: 600px;
    margin: auto;
    background: #fff;
    padding: 20px;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.center {
    text-align: center;
}

.small {
    font-size: 14px;
}

h2 {
    text-align: center;
}

label {
    display: block;
    margin-top: 10px;
    font-weight: bold;
}

input,
select {
    width: 100%;
    padding: 10px;
    margin-top: 5px;
    border-radius: 8px;
    border: 1px solid #bbb;
}

.error {
    border: 2px solid red !important;
    background: #ffeaea;
}

.btn-row {
    display: flex;
    margin-top: 15px;
}

button {
    flex: 1;
    margin: 4px;
    padding: 10px;
    background: #111;
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
}

.receipt {
    margin-top: 30px;
    padding: 20px;
    background: #fff;
    border-radius: 12px;
    border: 1px solid #ccc;
}

.title {
    font-size: 22px;
    font-weight: bold;
    text-align: center;
}

.line {
    margin: 6px 0;
    font-size: 15px;
}

.history-card {
    padding: 10px;
    margin-top: 8px;
    border-radius: 8px;
    background: #fafafa;
    border: 1px solid #ddd;
}

.hidden {
    display: none;
}

.icon-col {
    text-align: center;
    border-left: none !important;
    border-right: none !important;
}

.folder-icon {
    cursor: pointer;
    color: #333;
    transition: transform 0.15s ease, color 0.15s ease;
}

.folder-icon:hover {
    color: #000;
    transform: scale(1.15);
}