esun3d/app/code/Esun/CustomerMessage/view/frontend/web/css/messages.css

.account.customer-message-account-index .column.main,
.account.customer-message-order-contact .column.main {
    background: transparent;
    padding: 0 !important;
}

.esun-conversation-layout {
    background: #fff;
    border-radius: 7px;
    display: grid;
    grid-template-columns: 330px minmax(0, 1fr);
    min-height: 720px;
    overflow: hidden;
}

.esun-conversation-layout.is-order-conversation {
    display: block;
}

.esun-conversation-sidebar {
    border-right: 1px solid #e1e1e1;
    min-width: 0;
}

.esun-conversation-new {
    display: block;
    margin: 22px;
    text-align: center;
}

.esun-conversation-thread {
    border-top: 1px solid #ededed;
    color: #333;
    display: block;
    min-height: 78px;
    padding: 17px 48px 17px 22px;
    position: relative;
    text-decoration: none;
}

.esun-conversation-thread:hover,
.esun-conversation-thread.is-active {
    background: #f3faf6;
    color: #222;
    text-decoration: none;
}

.esun-conversation-thread strong,
.esun-conversation-thread span,
.esun-conversation-thread small {
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.esun-conversation-thread span,
.esun-conversation-thread small {
    color: #999;
    font-size: 13px;
    margin-top: 5px;
}

.esun-conversation-thread b {
    background: #18aa59;
    border-radius: 99px;
    color: #fff;
    font-size: 12px;
    min-width: 19px;
    padding: 2px 6px;
    position: absolute;
    right: 17px;
    text-align: center;
    top: 18px;
}

.esun-conversation-main {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.esun-conversation-main > header {
    align-items: center;
    border-bottom: 1px solid #e1e1e1;
    display: flex;
    justify-content: space-between;
    padding: 24px 30px;
}

.esun-conversation-main > header h1 {
    font-size: 27px;
    font-weight: 500;
    margin: 0;
}

.esun-conversation-main > header a {
    color: #18aa59;
}

.esun-conversation-messages {
    flex: 1;
    max-height: 650px;
    min-height: 420px;
    overflow-y: auto;
    padding: 30px;
}

.esun-conversation-entry {
    margin-bottom: 27px;
    max-width: 72%;
}

.esun-conversation-entry.is-customer {
    margin-left: auto;
}

.esun-conversation-entry > small {
    color: #888;
    display: block;
    margin-bottom: 8px;
}

.esun-conversation-entry.is-customer > small {
    text-align: right;
}

.esun-conversation-bubble {
    background: #f5f5f5;
    border-radius: 26px;
    line-height: 1.6;
    min-height: 24px;
    padding: 18px 23px;
}

.esun-conversation-entry.is-customer .esun-conversation-bubble {
    background: #e4f6ed;
}

.esun-conversation-images {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 13px;
}

.esun-conversation-images img {
    background: #fff;
    border-radius: 7px;
    height: 110px;
    object-fit: cover;
    width: 110px;
}

.esun-conversation-empty {
    color: #999;
    padding: 80px 20px;
    text-align: center;
}

.esun-conversation-compose {
    border-top: 1px solid #e1e1e1;
    padding: 22px 30px 25px;
}

.esun-conversation-compose > label > span {
    display: block;
    margin-bottom: 7px;
}

.esun-conversation-compose input.input-text,
.esun-conversation-compose textarea {
    box-sizing: border-box;
    margin-bottom: 15px;
    width: 100%;
}

.esun-conversation-compose__actions {
    align-items: center;
    display: flex;
    gap: 13px;
}

.esun-conversation-compose__actions > button {
    margin-left: auto;
    min-width: 120px;
}

.esun-conversation-upload {
    align-items: center;
    color: #18aa59;
    cursor: pointer;
    display: inline-flex;
    gap: 7px;
}

.esun-conversation-upload input {
    height: 1px;
    opacity: 0;
    overflow: hidden;
    position: absolute;
    width: 1px;
}

.esun-conversation-preview {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 12px;
}

.esun-conversation-preview img {
    border-radius: 5px;
    height: 72px;
    object-fit: cover;
    width: 72px;
}

@media (max-width: 900px) {
    .esun-conversation-layout { grid-template-columns: 260px minmax(0, 1fr); }
    .esun-conversation-entry { max-width: 88%; }
}

@media (max-width: 767px) {
    .esun-conversation-layout { display: block; min-height: 0; }
    .esun-conversation-sidebar { border-bottom: 1px solid #ddd; border-right: 0; max-height: 300px; overflow-y: auto; }
    .esun-conversation-main > header { padding: 20px; }
    .esun-conversation-main > header h1 { font-size: 22px; }
    .esun-conversation-messages { min-height: 330px; padding: 20px; }
    .esun-conversation-compose { padding: 20px; }
    .esun-conversation-compose__actions { align-items: flex-start; flex-wrap: wrap; }
    .esun-conversation-compose__actions > button { width: 100%; }
}