* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 20px;
    font-family: Arial, Helvetica, sans-serif;
    background: #f2f4f8;
}

.page {
    max-width: 700px;
    min-height: 90vh;
    margin: 0 auto;
    padding: 50px 30px 30px;
    background: #ffffff;
    border: 2px solid #2f4b7c;
}

.status {
    position: fixed;
    top: 10px;
    right: 20px;
    margin: 0;
    font-size: 14px;
}

.note-row {
    display: flex;
    align-items: center;
    gap: 30px;
    margin-bottom: 15px;
}

.note-box {
    width: 300px;
    max-width: 100%;
    min-height: 100px;
    padding: 10px;
    font-size: 16px;
    color: #ffffff;
    background: #4472c4;
    border: 1px solid #2f4b7c;
}

.note-display {
    margin-bottom: 15px;
    white-space: pre-wrap;
}

.btn {
    padding: 5px 20px;
    font-size: 16px;
    color: #ffffff;
    border: 1px solid;
    border-radius: 4px;
    cursor: pointer;
}

.btn-remove { background: #ed7d31; border-color: #ae5a21; }
.btn-add    { background: #70ad47; border-color: #507e32; }
.btn-back,
.btn-nav    { background: #2f4b7c; border-color: #1f3354; }

.nav .btn {
    margin-right: 10px;
}

.back-area {
    margin-top: 40px;
}