:root {
  --messages-bg: #f8fbff;
  --messages-panel: #ffffff;
  --messages-border: #e2e8f0;
  --messages-primary: #2563eb;
  --messages-muted: #64748b;
  --messages-text: #0f172a;
}

.messages-shell {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.messages-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  border: 1px solid var(--messages-border);
  border-radius: 1.25rem;
  background: linear-gradient(135deg, #ffffff 0%, #f8fbff 100%);
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.05);
}

.messages-eyebrow {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--messages-primary);
}

.messages-title {
  font-size: 1.5rem;
  font-weight: 800;
  margin: 0.2rem 0 0.2rem;
  color: var(--messages-text);
}

.messages-subtitle {
  margin: 0;
  color: var(--messages-muted);
}

.messages-action-btn {
  border: 0;
  border-radius: 999px;
  padding: 0.7rem 1rem;
  color: white;
  font-weight: 700;
  cursor: pointer;
}

.messages-layout {
  display: grid;
  grid-template-columns: minmax(280px, 370px) 1fr;
  gap: 1rem;
  min-height: 72vh;
}

.messages-sidebar,
.messages-main {
  border: 1px solid var(--messages-border);
  border-radius: 1.25rem;
  background: var(--messages-panel);
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.05);
}

.messages-sidebar {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-height: 0;
}

.messages-search-wrap {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 1rem;
  border-bottom: 1px solid var(--messages-border);
}

.messages-search-wrap input {
  border: 0;
  outline: 0;
  width: 100%;
  font-size: 0.95rem;
}

.messages-list {
  display: flex;
  flex-direction: column;
  flex: 1 1 auto;
  min-height: 0;
  padding: 0.75rem;
  gap: 0.5rem;
  overflow-y: auto;
  overflow-x: hidden;
  max-height: min(40rem, calc(100vh - 13rem));
  scrollbar-width: thin;
  scrollbar-color: #cbd5e1 transparent;
}

.messages-list::-webkit-scrollbar {
  width: 0.45rem;
}

.messages-list::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: 999px;
}

.messages-list::-webkit-scrollbar-track {
  background: transparent;
}

.messages-list-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: 0.85rem 0.9rem;
  border-radius: 0.95rem;
  border: 1px solid transparent;
  background: #f8fafc;
  text-align: left;
}

.messages-list-item.active {
  background: #e8f0ff;
  border-color: #bfdbfe;
}

.messages-list-main {
  min-width: 0;
}

.messages-list-title {
  font-weight: 700;
  color: var(--messages-text);
}

.messages-list-preview {
  font-size: 0.84rem;
  color: var(--messages-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.messages-list-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.3rem;
  flex-shrink: 0;
}

.messages-list-time {
  font-size: 0.74rem;
  color: var(--messages-muted);
}

.messages-unread {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.4rem;
  height: 1.4rem;
  border-radius: 999px;
  background: var(--messages-primary);
  color: white;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0 0.35rem;
}

.messages-main {
  display: flex;
  flex-direction: column;
  min-height: 0;
  height: 100%;
  overflow: hidden;
}

.messages-chat {
  display: flex;
  flex-direction: column;
  min-height: 0;
  height: 100%;
}

.messages-empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  text-align: center;
  padding: 2rem;
  color: var(--messages-muted);
}

.messages-empty-icon {
  width: 3rem;
  height: 3rem;
  border-radius: 999px;
  background: #e8f0ff;
  color: var(--messages-primary);
  display: grid;
  place-items: center;
  font-size: 1.2rem;
  margin-bottom: 0.8rem;
}

.messages-chat {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.messages-chat-header {
  padding: 1rem 1.2rem;
  border-bottom: 1px solid var(--messages-border);
}

.messages-chat-title {
  font-weight: 800;
  color: var(--messages-text);
}

.messages-chat-subtitle {
  font-size: 0.86rem;
  color: var(--messages-muted);
}

.messages-feed {
  flex: 1 1 auto;
  min-height: 0;
  max-height: calc(100vh - 220px);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  overflow-y: auto;
  background: linear-gradient(180deg, #fcfdff 0%, #f8fbff 100%);
}

.messages-feed::-webkit-scrollbar {
  width: 9px;
}

.messages-feed::-webkit-scrollbar-thumb {
  background: rgba(100, 116, 139, 0.25);
  border-radius: 999px;
}

.messages-day-divider {
  align-self: center;
  padding: 0.28rem 0.7rem;
  border-radius: 999px;
  background: #e2e8f0;
  color: var(--messages-muted);
  font-size: 0.74rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.messages-bubble {
  max-width: 78%;
  padding: 0.8rem 0.95rem;
  border-radius: 1rem 1rem 1rem 0.35rem;
  background: #ffffff;
  border: 1px solid var(--messages-border);
  align-self: flex-start;
}

.messages-bubble.mine {
  align-self: flex-end;
  border-radius: 1rem 1rem 0.35rem 1rem;
  background: #e8f0ff;
  border-color: #bfdbfe;
}

.messages-bubble-meta {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--messages-primary);
  margin-bottom: 0.25rem;
}

.messages-bubble-body {
  color: var(--messages-text);
  white-space: pre-wrap;
}

.messages-bubble-footer {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 0.35rem;
  margin-top: 0.45rem;
  font-size: 0.72rem;
  color: var(--messages-muted);
}

.messages-read-receipt {
  color: var(--messages-muted);
  font-weight: 700;
}

.messages-read-receipt.read {
  color: var(--messages-primary);
}

.messages-attachment {
  display: inline-block;
  margin-top: 0.45rem;
  color: var(--messages-primary);
  font-weight: 600;
}

.messages-composer {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem;
  border-top: 1px solid var(--messages-border);
  background: #ffffff;
}

.messages-attachment-btn {
  width: 2.8rem;
  height: 2.8rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: #f1f5f9;
  color: var(--messages-primary);
  cursor: pointer;
  border: 1px solid transparent;
}

.messages-composer-body {
  display: flex;
  flex-direction: column;
  width: 100%;
  min-height: 0;
}

.messages-composer textarea {
  width: 100%;
  border-radius: 1.6rem;
  border: 1px solid var(--messages-border);
  padding: 0.85rem 1rem;
  resize: none;
  min-height: 2.8rem;
  max-height: 7rem;
  line-height: 1.4;
  font-size: 0.95rem;
}

.messages-send-btn {
  border: 0;
  border-radius: 999px;
  padding: 0.88rem 1.2rem;
  background: linear-gradient(135deg, var(--messages-primary) 0%, #3b82f6 100%);
  color: white;
  font-weight: 700;
  cursor: pointer;
  min-width: 5.2rem;
}

.messages-empty-mini {
  padding: 1rem;
  color: var(--messages-muted);
  font-size: 0.9rem;
  text-align: center;
}

.messages-modal {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.45);
  display: grid;
  place-items: center;
  padding: 1rem;
  z-index: 1100;
}

.messages-modal-card {
  width: min(100%, 420px);
  background: white;
  border-radius: 1.25rem;
  padding: 1.25rem;
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.16);
}

.messages-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.8rem;
}

.messages-modal-close {
  border: 0;
  background: transparent;
  font-size: 1.2rem;
  cursor: pointer;
}

.messages-modal-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 0.45rem;
}

.messages-modal-select {
  width: 100%;
  border: 1px solid var(--messages-border);
  border-radius: 0.8rem;
  padding: 0.75rem;
  margin-bottom: 1rem;
}

.messages-modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.6rem;
}

.messages-modal-cancel,
.messages-modal-confirm {
  border: 0;
  border-radius: 999px;
  padding: 0.7rem 1rem;
  cursor: pointer;
  font-weight: 700;
}

.messages-modal-cancel {
  background: #f1f5f9;
  color: var(--messages-text);
}

.messages-modal-confirm {
  background: linear-gradient(135deg, var(--messages-primary) 0%, #3b82f6 100%);
  color: white;
}

.hidden {
  display: none !important;
}

@media (max-width: 991px) {
  .messages-layout {
    grid-template-columns: 1fr;
  }

  .messages-sidebar {
    max-height: 40vh;
  }
}