body {
    background-color: #f8f9fa;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    padding-top: 40px;
}

.main-card {
    max-width: 700px;
    margin: 0 auto;
    padding: 30px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.06);
}

.main-card h1 {
    text-align: center;
    font-weight: 700;
    color: #212529;
    margin-bottom: 30px;
    letter-spacing: 1px;
}

/* Поиск */
.search-box {
    margin-bottom: 24px;
}

/* Группа */
.group-card {
    margin-bottom: 20px;
    border: 1px solid #e9ecef;
    border-radius: 8px;
    overflow: hidden;
}

.group-header {
    background-color: #f8f9fa;
    padding: 14px 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-weight: 600;
    color: #495057;
}

.users-list {
    padding: 0;
}

.user-item {
    padding: 12px 16px;
    border-bottom: 1px solid #e9ecef;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.user-item:last-child {
    border-bottom: none;
}

.user-info strong {
    font-size: 1.05rem;
}

.user-info small {
    color: #6c757d;
    font-size: 0.875rem;
}

.btn-outline-primary {
    border-color: #0d6efd;
    color: #0d6efd;
}

.btn-outline-primary:hover {
    background-color: #0d6efd;
    color: white;
}

/* Модальное окно — улучшенное под стиль */
.modal-content {
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
}

.modal-header {
    border-bottom: none;
    padding-bottom: 10px;
}

.modal-title {
    font-weight: 700;
    font-size: 1.25rem;
}

.modal-body p {
    margin: 8px 0;
}