.mts-support-detail { overflow: hidden; border: 1px solid var(--mts-border); border-radius: 22px; background: var(--mts-surface); box-shadow: var(--mts-shadow-md); }
.mts-support-detail-head { display: flex; align-items: center; justify-content: space-between; gap: 18px; min-height: 76px; padding: 16px 22px; color: #fff; background: linear-gradient(110deg, var(--mts-navy), var(--mts-blue)); }
.mts-support-detail-head small { color: rgba(255,255,255,.68); font-size: 12px; }
.mts-support-detail-head h2 { margin: 2px 0 0; color: #fff; font-size: 20px; line-height: 1.45; }
.mts-support-detail-head .mts-support-status { color: var(--mts-navy); background: var(--mts-gold); }
.mts-support-messages { display: flex; flex-direction: column; gap: 16px; max-height: 540px; overflow: auto; padding: 24px; background: linear-gradient(180deg, #f6f8fb, #eef3f8); scroll-behavior: smooth; }
.mts-support-message { width: min(78%, 700px); padding: 0; overflow: hidden; border: 1px solid #dce5ee; border-radius: 18px; background: #fff; box-shadow: 0 8px 22px rgba(15,35,59,.07); }
.mts-support-message.is-agent { align-self: flex-start; border-color: #183f70; }
.mts-support-message.is-customer { align-self: flex-end; border-color: #d7dfe8; }
.mts-support-message header { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 44px; padding: 10px 15px; color: var(--mts-navy); font-size: 13px; font-weight: 900; background: linear-gradient(135deg, #eef3f8, #dfe7f0); }
.mts-support-message.is-agent header { color: #fff; background: linear-gradient(135deg, var(--mts-navy), var(--mts-blue)); }
.mts-support-message header time { color: inherit; opacity: .7; font-size: 11px; font-weight: 500; white-space: nowrap; }
.mts-support-message > div { min-height: 86px; padding: 16px; color: var(--mts-text); background: linear-gradient(135deg, #fff, #fbfcfe); line-height: 1.9; }
.mts-support-message.is-agent > div { background: linear-gradient(135deg, #fff, #f2f7fc); }
.mts-support-message footer { padding: 9px 15px; border-top: 1px solid #e8edf3; color: var(--mts-muted); background: #f7f9fb; font-size: 11px; }
.mts-support-reply { padding: 20px 22px 12px; border-top: 1px solid var(--mts-border); background: var(--mts-surface); }
.mts-support-reply textarea { width: 100%; min-height: 142px; padding: 15px; border: 1px solid var(--mts-border); border-radius: 16px; color: var(--mts-text); background: #fff; font: inherit; resize: vertical; }
.mts-support-reply textarea:focus { outline: 0; border-color: var(--mts-cyan); box-shadow: 0 0 0 4px rgba(95,247,242,.16); }
.mts-support-reply input[type=file], .mts-support-field input[type=file] { width: 100%; padding: 11px; border: 1px dashed #bdcddd; border-radius: 13px; color: var(--mts-muted); background: var(--mts-surface-soft); font: inherit; }
.mts-support-detail > .mts-support-actions { margin: 0; padding: 12px 22px 22px; background: var(--mts-surface); }
.mts-support-attachments { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 10px; margin-top: 12px; }
.mts-support-attachment { min-width: 0; padding: 10px; border: 1px solid #d8e2ed; border-radius: 13px; color: var(--mts-blue); background: linear-gradient(145deg, #fff, #f1f5f9); font-size: 11px; text-overflow: ellipsis; white-space: nowrap; overflow: hidden; }
@media (max-width: 760px) { .mts-support-detail-head { min-height: 68px; padding: 13px 15px; } .mts-support-detail-head h2 { font-size: 17px; } .mts-support-messages { max-height: 480px; padding: 15px; } .mts-support-message { width: 90%; } .mts-support-reply { padding: 15px 14px 8px; } .mts-support-detail > .mts-support-actions { padding: 10px 14px 16px; } .mts-support-attachments { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

/* Conversation workspace refinement */
.mts-support-detail { border-radius: 22px; box-shadow: 0 16px 40px rgba(15,35,59,.1); }
.mts-support-detail-head { min-height: 102px; padding: 22px 26px; background: radial-gradient(circle at 90% 20%, rgba(244,194,67,.17), transparent 28%), linear-gradient(125deg,#06121d,#173e76); }
.mts-support-detail-head small { display: inline-flex; align-items: center; gap: 5px; color: var(--mts-gold); font-weight: 800; }
.mts-support-detail-head h2 { max-width: 620px; margin-top: 5px; font-size: 22px; }
.mts-support-detail-badges { justify-content: flex-start; }
.mts-support-detail-head .mts-support-status, .mts-support-detail-head .mts-support-priority { border: 1px solid rgba(255,255,255,.18); }
.mts-support-messages { max-height: 590px; padding: 28px 30px; gap: 18px; background: linear-gradient(180deg,#f7fafc,#edf3f8); }
.mts-support-message { width: min(76%, 700px); border-radius: 17px; box-shadow: 0 7px 20px rgba(15,35,59,.06); }
.mts-support-message.is-agent { align-self: flex-start; border-inline-start: 4px solid var(--mts-blue); }
.mts-support-message.is-customer { align-self: flex-end; border-inline-end: 4px solid var(--mts-gold); }
.mts-support-message header { padding: 11px 16px; }
.mts-support-message > div { min-height: 92px; padding: 18px; font-size: 13px; }
.mts-support-message footer { padding: 10px 16px; }
.mts-support-reply { padding: 22px 26px 14px; background: #fff; }
.mts-support-reply::before { content: "پاسخ شما"; display: block; margin-bottom: 9px; color: var(--mts-navy); font-size: 14px; font-weight: 900; }
.mts-support-reply textarea { min-height: 132px; border-radius: 14px; background: #fcfdff; }
.mts-support-reply input[type=file] { min-height: 64px; margin-top: 11px; padding: 18px 13px; }
.mts-support-detail > .mts-support-actions { justify-content: space-between; padding: 12px 26px 24px; }
@media (max-width: 760px) {
  .mts-support-detail-head { align-items: flex-start; flex-direction: column; min-height: 0; padding: 18px 16px; }
  .mts-support-detail-head h2 { font-size: 18px; }
  .mts-support-messages { padding: 18px 14px; }
  .mts-support-message { width: 92%; }
  .mts-support-reply { padding: 18px 15px 12px; }
  .mts-support-detail > .mts-support-actions { padding: 11px 15px 18px; }
}

/* Primary actions: send on the real left, close on its right. */
.mts-support-reply .mts-support-actions { display: flex; align-items: center; justify-content: flex-start; direction: ltr; gap: 8px; }
.mts-support-reply .mts-support-actions .mts-support-button { min-width: 158px; }
.mts-support-reply .mts-support-actions .is-danger { color: #fff; border-color: #c93845; background: linear-gradient(135deg,#b91c2c,#e0525c); box-shadow: 0 8px 18px rgba(185,28,44,.18); }
@media (max-width: 760px) { .mts-support-reply .mts-support-actions { flex-wrap: wrap; } .mts-support-reply .mts-support-actions .mts-support-button { min-width: 0; flex: 1 1 145px; } }

/* Final attachment/uploader overrides: detail.css is loaded after frontend.css. */
.mts-support-reply .mts-support-uploader { display: grid; width: 100%; min-height: 112px; margin-top: 9px; padding: 16px; border: 1px dashed #b8c9db; border-radius: 15px; background: linear-gradient(145deg,#f8fbff,#eef5fb); text-align: center; }
.mts-support-reply .mts-support-uploader input[type=file], .mts-support-field .mts-support-uploader input[type=file] { position: absolute; width: 1px; height: 1px; min-height: 1px; padding: 0; opacity: 0; pointer-events: none; }
.mts-support-reply .mts-support-uploader-icon, .mts-support-field .mts-support-uploader-icon { display: grid; place-items: center; width: 38px; height: 38px; border-radius: 12px; color: #fff; background: linear-gradient(135deg,var(--mts-navy),var(--mts-blue)); font-size: 24px; }
.mts-support-reply .mts-support-attachment-list { display: flex; flex-wrap: wrap; gap: 7px; }
.mts-support-reply .mts-support-attachment { display: inline-flex; align-items: center; justify-content: center; gap: 5px; width: 112px; min-width: 112px; height: 34px; padding: 6px 8px; border: 1px solid #d8e2ed; border-radius: 10px; color: var(--mts-blue); background: linear-gradient(145deg,#fff,#f1f5f9); font: inherit; font-size: 10px; font-weight: 850; cursor: pointer; }
.mts-support-reply .mts-support-attachment span:last-child { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.mts-support-detail > .mts-support-actions .is-danger { color: #fff; border-color: #c93845; background: linear-gradient(135deg,#b91c2c,#e0525c); box-shadow: 0 8px 18px rgba(185,28,44,.18); }

/* Conversation direction is explicit so RTL cannot invert the chat layout. */
.mts-support-message.is-customer { align-self: flex-end; }
.mts-support-message.is-agent { align-self: flex-start; }

/* File chips stay beside each other; overflow is horizontal when needed. */
.mts-support-reply .mts-support-upload-list, .mts-support-reply .mts-support-attachment-list { display: flex; flex-wrap: nowrap; align-items: center; gap: 7px; max-width: 100%; overflow-x: auto; padding-bottom: 2px; scrollbar-width: thin; }
.mts-support-reply .mts-support-upload-card, .mts-support-reply .mts-support-attachment { flex: 0 0 112px; }

/* Physical placement for RTL: customer right, support left. */
.mts-support-message.is-customer { align-self: unset; margin-left: auto; margin-right: 0; }
.mts-support-message.is-agent { align-self: unset; margin-left: 0; margin-right: auto; }
@media (max-width: 760px) { .mts-support-reply .mts-support-uploader { min-height: 104px; } .mts-support-reply .mts-support-attachment { width: 104px; min-width: 104px; } }

/* Match account controls and establish a clear action hierarchy. */
.mts-support-detail-head { min-height: 78px; padding: 16px 20px; }
.mts-support-detail-head h2 { font-size: 18px; }
.mts-support-messages { max-height: 500px; padding: 20px; gap: 14px; }
.mts-support-message { width: min(74%, 650px); }
.mts-support-message > div { min-height: 70px; padding: 14px; font-size: 12px; }
.mts-support-reply { padding: 16px 20px 10px; }
.mts-support-reply::before { margin-bottom: 6px; font-size: 12px; }
.mts-support-reply textarea { min-height: 112px; padding: 11px; font-size: 11px; }
.mts-support-reply input[type=file] { min-height: 52px; margin-top: 8px; padding: 13px 11px; font-size: 10px; }
.mts-support-reply .mts-support-actions { justify-content: flex-start; margin-top: 10px; padding-top: 0; }
.mts-support-reply .mts-support-button { min-height: 43px; }
.mts-support-detail > .mts-support-actions { justify-content: flex-start; margin: 0; padding: 10px 20px 17px; border-top: 1px solid var(--mts-border); }
.mts-support-detail > .mts-support-actions .mts-support-button { min-height: 37px; padding: 7px 13px; font-size: 10px; }
@media (max-width: 760px) {
  .mts-support-detail-head { min-height: 0; padding: 14px 15px; }
  .mts-support-detail-head h2 { font-size: 16px; }
  .mts-support-messages { max-height: 430px; padding: 14px; }
  .mts-support-message { width: 90%; }
  .mts-support-reply { padding: 14px 15px 9px; }
  .mts-support-detail > .mts-support-actions { padding: 9px 15px 14px; }
}

/* Conversation and composer refinement. */
.mts-support-detail-head { min-height: 84px; padding: 17px 22px; }
.mts-support-detail-head h2 { font-size: 19px; }
.mts-support-messages { max-height: 560px; padding: 22px; gap: 14px; }
.mts-support-message { width: min(74%, 680px); border-radius: 16px; }
.mts-support-message > div { min-height: 72px; padding: 14px 16px; }
.mts-support-reply { padding: 18px 22px 12px; }
.mts-support-reply textarea { min-height: 118px; padding: 13px 15px; border-radius: 13px; }
.mts-support-reply .mts-support-uploader { min-height: 92px; margin-top: 10px; padding: 12px; border-radius: 13px; }
.mts-support-reply .mts-support-actions { margin-top: 10px; }
@media (max-width: 760px) { .mts-support-detail-head { padding: 15px; } .mts-support-messages { padding: 14px; } .mts-support-message { width: 88%; } .mts-support-reply { padding: 15px 14px 10px; } }

/* Final conversation polish. Customer remains physically on the right; support on the left. */
.mts-support-detail-head { align-items: center; flex-wrap: wrap; }
.mts-support-detail-head > div:first-child { min-width: 0; }
.mts-support-detail-badges { display: flex; flex-wrap: wrap; gap: 6px; }
.mts-support-message { position: relative; }
.mts-support-message.is-customer { margin-left: auto; margin-right: 0; border-inline-end: 4px solid var(--mts-gold); }
.mts-support-message.is-agent { margin-left: 0; margin-right: auto; border-inline-start: 4px solid var(--mts-blue); }
.mts-support-message footer:empty { display: none; }
.mts-support-message footer .mts-support-attachment-list { display: flex; flex-wrap: nowrap; gap: 7px; overflow-x: auto; }
.mts-support-reply { position: relative; }
.mts-support-reply textarea::placeholder { color: #8a9bad; }
.mts-support-reply .mts-support-uploader.is-dragging { border-color: var(--mts-blue); box-shadow: 0 0 0 4px rgba(31,91,148,.1); }
@media (max-width: 760px) {
  .mts-support-detail-head { align-items: flex-start; }
  .mts-support-detail-back { order: 3; width: 100%; justify-content: center; }
  .mts-support-message.is-customer { margin-left: auto; margin-right: 0; }
  .mts-support-message.is-agent { margin-left: 0; margin-right: auto; }
}