:root {
  --psc-message-navy: #142b4a;
  --psc-message-gold: #f6c431;
  --psc-message-bg: #f4f6f9;
  --psc-message-border: #dce2ea;
  --psc-message-muted: #687386;
  --psc-message-own-bubble: #FFF9C4;
  --psc-message-own-border: #E9E2C8;
  --psc-message-own-text: #1D2738;
  --psc-message-own-muted: #665F49;
}

.psc-message-header-button {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .45rem;
  min-height: 36px;
  padding: .42rem .78rem;
  border: 1px solid rgba(255, 255, 255, .5);
  border-radius: 999px;
  color: #fff;
  text-decoration: none;
  font-size: .84rem;
  font-weight: 700;
  line-height: 1;
  background: rgba(255, 255, 255, .08);
  transition: background-color .2s ease, border-color .2s ease, transform .2s ease;
}

.psc-message-header-button:hover,
.psc-message-header-button:focus-visible {
  color: #fff;
  background: rgba(255, 255, 255, .18);
  border-color: rgba(255, 255, 255, .85);
  transform: translateY(-1px);
}

.psc-message-unread-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  padding: 0 5px;
  border-radius: 999px;
  background: var(--psc-message-gold);
  color: #17233a;
  font-size: .7rem;
  font-weight: 900;
  box-shadow: 0 0 0 2px var(--psc-message-navy);
}

.message-student-btn {
  white-space: nowrap;
}

.psc-messaging-page {
  min-height: 100vh;
  background: var(--psc-message-bg);
  color: #182235;
}

.psc-messaging-navbar {
  background: var(--psc-message-navy);
  color: #fff;
  box-shadow: 0 10px 30px rgba(16, 35, 62, .16);
}

.psc-messaging-navbar .brand-logo {
  width: 38px;
  height: 38px;
  object-fit: contain;
}

.psc-messaging-shell {
  width: min(1320px, calc(100% - 28px));
  margin: 24px auto 42px;
}

.psc-messaging-layout {
  display: grid;
  grid-template-columns: minmax(290px, 360px) minmax(0, 1fr);
  min-height: calc(100vh - 150px);
  border: 1px solid var(--psc-message-border);
  border-radius: 22px;
  overflow: hidden;
  background: #fff;
  box-shadow: 0 18px 50px rgba(28, 49, 78, .11);
}

.psc-messaging-sidebar {
  border-right: 1px solid var(--psc-message-border);
  background: #fbfcfe;
  min-width: 0;
}

.psc-messaging-sidebar-header {
  padding: 20px;
  border-bottom: 1px solid var(--psc-message-border);
}

.psc-messaging-sidebar-header h1 {
  margin: 0;
  font-size: 1.32rem;
  font-weight: 800;
  color: var(--psc-message-navy);
}

.psc-messaging-sidebar-header p {
  margin: .35rem 0 0;
  color: var(--psc-message-muted);
  font-size: .88rem;
}

.psc-new-thread-panel {
  padding: 15px 20px;
  border-bottom: 1px solid var(--psc-message-border);
  background: #fff9e7;
}

.psc-thread-list {
  max-height: calc(100vh - 310px);
  overflow-y: auto;
}

.psc-thread-button {
  width: 100%;
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr) auto;
  gap: 11px;
  align-items: center;
  border: 0;
  border-bottom: 1px solid #edf0f5;
  background: transparent;
  padding: 15px 18px;
  text-align: left;
  color: inherit;
}

.psc-thread-button:hover,
.psc-thread-button:focus-visible {
  background: #f3f7fc;
}

.psc-thread-button.active {
  background: #eaf1fb;
  box-shadow: inset 4px 0 0 var(--psc-message-gold);
}

.psc-thread-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--psc-message-navy);
  color: #fff;
  font-weight: 800;
}

.psc-thread-copy {
  min-width: 0;
}

.psc-thread-title,
.psc-thread-counterpart,
.psc-thread-preview {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.psc-thread-title {
  font-weight: 800;
  color: #17233a;
  font-size: .93rem;
}

.psc-thread-counterpart,
.psc-thread-preview {
  color: var(--psc-message-muted);
  font-size: .78rem;
}

.psc-thread-unread {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 23px;
  height: 23px;
  border-radius: 999px;
  padding: 0 6px;
  background: var(--psc-message-gold);
  color: #17233a;
  font-size: .72rem;
  font-weight: 900;
}

.psc-conversation-panel {
  min-width: 0;
  display: flex;
  flex-direction: column;
  background: #fff;
}

.psc-conversation-header {
  min-height: 88px;
  padding: 18px 22px;
  border-bottom: 1px solid var(--psc-message-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.psc-conversation-header h2 {
  margin: 0;
  color: var(--psc-message-navy);
  font-size: 1.15rem;
  font-weight: 800;
}

.psc-conversation-header p {
  margin: .25rem 0 0;
  color: var(--psc-message-muted);
  font-size: .84rem;
}

.psc-message-list {
  flex: 1;
  min-height: 420px;
  max-height: calc(100vh - 300px);
  overflow-y: auto;
  padding: 24px;
  background:
    linear-gradient(rgba(244, 247, 251, .95), rgba(244, 247, 251, .95)),
    radial-gradient(circle at top right, rgba(246, 196, 49, .15), transparent 34%);
}

.psc-message-row {
  display: flex;
  margin-bottom: 14px;
}

.psc-message-row.mine {
  justify-content: flex-end;
}

.psc-message-bubble {
  max-width: min(74%, 680px);
  padding: 11px 14px;
  border-radius: 16px 16px 16px 4px;
  background: #fff;
  border: 1px solid var(--psc-message-border);
  box-shadow: 0 5px 18px rgba(34, 52, 78, .06);
}

.psc-message-row.mine .psc-message-bubble {
  background: var(--psc-message-own-bubble);
  color: var(--psc-message-own-text);
  border-color: var(--psc-message-own-border);
  border-radius: 16px 16px 4px 16px;
  box-shadow: 0 3px 12px rgba(81, 69, 31, .08);
}

.psc-message-sender {
  font-size: .72rem;
  font-weight: 800;
  margin-bottom: 5px;
  color: #53627a;
}

.psc-message-row.mine .psc-message-sender {
  color: #40516b;
}

.psc-message-text {
  margin: 0;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  line-height: 1.45;
}

.psc-message-time {
  display: block;
  margin-top: 6px;
  font-size: .68rem;
  opacity: .72;
  text-align: right;
}

.psc-message-composer {
  padding: 16px 20px;
  border-top: 1px solid var(--psc-message-border);
  background: #fff;
}

.psc-message-composer textarea {
  resize: vertical;
  min-height: 74px;
  max-height: 180px;
}

.psc-message-empty {
  min-height: 300px;
  display: grid;
  place-items: center;
  padding: 30px;
  text-align: center;
  color: var(--psc-message-muted);
}

.psc-message-empty i {
  display: block;
  font-size: 2.4rem;
  color: #9aa8bb;
  margin-bottom: 10px;
}

.psc-message-status {
  min-height: 20px;
  margin-top: 8px;
  font-size: .8rem;
}

@media (max-width: 860px) {
  .psc-messaging-shell {
    width: min(100% - 16px, 720px);
    margin-top: 12px;
  }

  .psc-messaging-layout {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .psc-messaging-sidebar {
    border-right: 0;
    border-bottom: 1px solid var(--psc-message-border);
  }

  .psc-thread-list {
    max-height: 300px;
  }

  .psc-message-list {
    max-height: 55vh;
    min-height: 360px;
    padding: 16px;
  }

  .psc-message-bubble {
    max-width: 88%;
  }
}

@media (max-width: 560px) {
  .psc-message-header-label {
    display: none;
  }

  .psc-message-header-button {
    width: 38px;
    padding: 0;
  }

  .psc-conversation-header {
    padding: 14px 16px;
  }

  .psc-message-composer {
    padding: 13px;
  }
}

.psc-message-header-button.psc-message-header-button-dark {
  color: var(--psc-message-navy);
  border-color: #c8d1df;
  background: #fff;
}

.psc-message-header-button.psc-message-header-button-dark:hover,
.psc-message-header-button.psc-message-header-button-dark:focus-visible {
  color: var(--psc-message-navy);
  border-color: var(--psc-message-navy);
  background: #f5f8fc;
}

.psc-message-header-button.psc-message-header-button-dark .psc-message-unread-badge {
  box-shadow: 0 0 0 2px #fff;
}

.student-row-actions {
  gap: .5rem;
  flex-wrap: wrap;
}

/* ==========================================================
   Messaging Experience Layer v2: sounds, toast, and emojis
   ========================================================== */

.psc-message-sound-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .42rem;
  min-height: 36px;
  padding: .42rem .72rem;
  border: 1px solid #c8d1df;
  border-radius: 999px;
  background: #fff;
  color: var(--psc-message-navy);
  font-size: .78rem;
  font-weight: 800;
  line-height: 1;
  white-space: nowrap;
  transition: background-color .2s ease, border-color .2s ease, transform .2s ease;
}

.psc-message-sound-toggle:hover,
.psc-message-sound-toggle:focus-visible {
  color: var(--psc-message-navy);
  border-color: var(--psc-message-navy);
  background: #f5f8fc;
  transform: translateY(-1px);
}

.psc-message-sound-toggle[data-message-sound-state="enabled"] {
  border-color: rgba(246, 196, 49, .9);
  background: #fff8db;
}

.psc-message-sound-toggle-navbar {
  color: #fff;
  border-color: rgba(255, 255, 255, .5);
  background: rgba(255, 255, 255, .08);
}

.psc-message-sound-toggle-navbar:hover,
.psc-message-sound-toggle-navbar:focus-visible {
  color: #fff;
  border-color: rgba(255, 255, 255, .85);
  background: rgba(255, 255, 255, .18);
}

.psc-message-sound-toggle-navbar[data-message-sound-state="enabled"] {
  color: #17233a;
  border-color: var(--psc-message-gold);
  background: var(--psc-message-gold);
}

.psc-message-sound-prompt {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 2147482000;
  width: min(360px, calc(100vw - 28px));
  padding: 17px;
  border: 1px solid #d9e0e9;
  border-radius: 17px;
  background: #fff;
  color: #17233a;
  box-shadow: 0 18px 55px rgba(19, 39, 67, .22);
}

.psc-message-sound-prompt strong {
  display: block;
  color: var(--psc-message-navy);
  font-size: .95rem;
}

.psc-message-sound-prompt p {
  margin: .4rem 0 .8rem;
  color: var(--psc-message-muted);
  font-size: .82rem;
  line-height: 1.45;
}

.psc-message-sound-prompt-actions {
  display: flex;
  gap: .55rem;
  justify-content: flex-end;
}

.psc-message-toast-container {
  position: fixed;
  top: 18px;
  right: 18px;
  z-index: 2147481900;
  display: grid;
  gap: 10px;
  width: min(350px, calc(100vw - 28px));
  pointer-events: none;
}

.psc-message-toast {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 11px;
  align-items: center;
  padding: 13px 14px;
  border: 1px solid #d7dee8;
  border-radius: 16px;
  background: #fff;
  color: #17233a;
  text-decoration: none;
  box-shadow: 0 18px 48px rgba(19, 39, 67, .2);
  opacity: 0;
  transform: translateY(-12px);
  transition: opacity .22s ease, transform .22s ease;
  pointer-events: auto;
}

.psc-message-toast.show {
  opacity: 1;
  transform: translateY(0);
}

.psc-message-toast:hover,
.psc-message-toast:focus-visible {
  color: #17233a;
  border-color: var(--psc-message-gold);
}

.psc-message-toast-icon {
  width: 42px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--psc-message-navy);
  color: var(--psc-message-gold);
  font-size: 1.15rem;
}

.psc-message-toast strong,
.psc-message-toast small {
  display: block;
}

.psc-message-toast strong {
  font-size: .88rem;
}

.psc-message-toast small {
  margin-top: .15rem;
  color: var(--psc-message-muted);
  font-size: .76rem;
}

.psc-message-compose-box {
  position: relative;
}

.psc-message-compose-box textarea {
  padding-right: 52px;
}

.psc-emoji-trigger {
  position: absolute;
  right: 10px;
  bottom: 10px;
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid #d8dee8;
  border-radius: 50%;
  background: #fff;
  font-size: 1.1rem;
  line-height: 1;
  transition: transform .18s ease, background-color .18s ease, border-color .18s ease;
}

.psc-emoji-trigger:hover,
.psc-emoji-trigger:focus-visible,
.psc-emoji-trigger[aria-expanded="true"] {
  border-color: var(--psc-message-gold);
  background: #fff8db;
  transform: scale(1.04);
}

.psc-emoji-picker[hidden] {
  display: none !important;
}

.psc-emoji-picker {
  position: absolute;
  left: 0;
  bottom: calc(100% + 10px);
  z-index: 1200;
  width: min(390px, calc(100vw - 42px));
  max-height: 330px;
  overflow-y: auto;
  padding: 13px;
  border: 1px solid #d8dfe9;
  border-radius: 16px;
  background: #fff;
  box-shadow: 0 18px 50px rgba(19, 39, 67, .2);
}

.psc-emoji-section + .psc-emoji-section {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid #edf0f5;
}

.psc-emoji-section h3 {
  margin: 0 0 7px;
  color: var(--psc-message-muted);
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .03em;
  text-transform: uppercase;
}

.psc-emoji-grid {
  display: grid;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  gap: 4px;
}

.psc-emoji-option {
  min-width: 0;
  height: 36px;
  border: 0;
  border-radius: 9px;
  background: transparent;
  font-size: 1.18rem;
  line-height: 1;
  transition: transform .15s ease, background-color .15s ease;
}

.psc-emoji-option:hover,
.psc-emoji-option:focus-visible {
  background: #f2f5f9;
  transform: scale(1.13);
}

.psc-emoji-empty {
  grid-column: 1 / -1;
  color: var(--psc-message-muted);
  font-size: .76rem;
}

@media (max-width: 640px) {
  .psc-message-sound-label {
    display: none;
  }

  .psc-message-sound-toggle,
  .psc-message-sound-toggle-compact {
    width: 38px;
    padding: 0;
  }

  .psc-message-sound-prompt {
    right: 10px;
    bottom: 10px;
  }

  .psc-message-toast-container {
    top: 10px;
    right: 10px;
  }

  .psc-emoji-grid {
    grid-template-columns: repeat(7, minmax(0, 1fr));
  }
}

/* ==========================================================
   Messaging Phase 3: typing presence and read receipts
   ========================================================== */

.psc-message-meta {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: .45rem;
  margin-top: 6px;
  font-size: .68rem;
  line-height: 1.2;
  opacity: .78;
}

.psc-message-meta .psc-message-time {
  display: inline;
  margin-top: 0;
  text-align: inherit;
}

.psc-message-delivery {
  display: inline-flex;
  align-items: center;
  gap: .18rem;
  font-weight: 700;
  white-space: nowrap;
}

.psc-message-delivery i {
  font-size: .8rem;
}

.psc-message-delivery.read {
  color: #ffe58f;
  opacity: 1;
}

.psc-typing-indicator {
  min-height: 27px;
  display: flex;
  align-items: center;
  gap: .48rem;
  margin: -3px 0 8px;
  color: #53627a;
  font-size: .78rem;
  font-weight: 700;
}

.psc-typing-indicator.d-none {
  display: none !important;
}

.psc-typing-dots {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  min-width: 28px;
}

.psc-typing-dots span {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--psc-message-navy);
  animation: pscTypingDot 1.1s infinite ease-in-out;
}

.psc-typing-dots span:nth-child(2) {
  animation-delay: .14s;
}

.psc-typing-dots span:nth-child(3) {
  animation-delay: .28s;
}

@keyframes pscTypingDot {
  0%, 60%, 100% {
    opacity: .32;
    transform: translateY(0);
  }
  30% {
    opacity: 1;
    transform: translateY(-3px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .psc-typing-dots span {
    animation: none;
    opacity: .75;
  }
}

@media (max-width: 560px) {
  .psc-message-meta {
    gap: .34rem;
  }

  .psc-message-delivery span {
    font-size: .64rem;
  }

  .psc-typing-indicator {
    font-size: .74rem;
  }
}

/* v20260722: profile-photo messaging and administrator header support */
.psc-thread-avatar {
  position: relative;
  overflow: hidden;
}

.psc-thread-avatar img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
}

.psc-thread-avatar.has-image img {
  opacity: 1;
}

.psc-thread-avatar-fallback {
  display: inline-grid;
  place-items: center;
  width: 100%;
  height: 100%;
}

.psc-message-avatar {
  width: 32px;
  height: 32px;
  flex: 0 0 32px;
  align-self: flex-end;
  font-size: .62rem;
}

.admin-navbar .psc-message-header-button {
  color: #18314f;
  border-color: #c8d3e0;
  background: #fff;
}

.admin-navbar .psc-message-header-button:hover,
.admin-navbar .psc-message-header-button:focus-visible {
  color: #18314f;
  border-color: #8da2bb;
  background: #f4f7fb;
}

.admin-navbar .psc-message-unread-badge {
  box-shadow: 0 0 0 2px #fff;
}

/* v20260722.1: clean white profile framing and safe inline links */
.psc-thread-avatar,
.psc-message-avatar {
  border: 2px solid #fff;
  background: #fff;
  color: var(--psc-message-navy);
  box-shadow: none;
}

.psc-thread-avatar img,
.psc-message-avatar img {
  background: #fff;
}

.psc-thread-avatar-fallback {
  background: #fff;
  color: var(--psc-message-navy);
}

.psc-message-text .psc-message-inline-link {
  color: #174f9b;
  font-weight: 700;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

.psc-message-row.mine .psc-message-text .psc-message-inline-link {
  color: #174f9b;
}

.psc-message-text .psc-message-inline-link:hover,
.psc-message-text .psc-message-inline-link:focus-visible {
  text-decoration-thickness: 2px;
  outline: none;
}


/* v20260722.2: soft-yellow outgoing message treatment */
.psc-message-row.mine .psc-message-time,
.psc-message-row.mine .psc-message-delivery {
  color: var(--psc-message-own-muted);
  opacity: 1;
}


/* Group read-position avatars v1.2 */
.psc-message-stack {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  min-width: 0;
  max-width: min(74%, 680px);
}
.psc-message-row.mine .psc-message-stack { align-items: flex-end; }
.psc-message-stack .psc-message-bubble { max-width: 100%; }
.psc-message-read-receipts {
  display: flex;
  align-items: center;
  gap: .4rem;
  min-height: 25px;
  margin-top: .28rem;
  padding: 0 .18rem;
  color: #68768a;
  font-size: .67rem;
  line-height: 1;
}
.psc-message-row.mine .psc-message-read-receipts { justify-content: flex-end; }
.psc-message-read-label { font-weight: 700; white-space: nowrap; }
.psc-message-read-avatar-group { display: inline-flex; align-items: center; padding-left: 4px; }
.psc-thread-avatar.psc-message-read-avatar {
  width: 23px;
  height: 23px;
  min-width: 23px;
  margin-left: -5px;
  border: 2px solid #fff;
  background: #fff;
  box-shadow: none;
}
.psc-thread-avatar.psc-message-read-avatar:first-child { margin-left: 0; }
.psc-message-read-avatar .psc-thread-avatar-fallback { font-size: .5rem; }
.psc-message-read-more {
  min-width: 23px;
  height: 23px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-left: -5px;
  padding: 0 5px;
  border: 2px solid #fff;
  border-radius: 999px;
  background: #edf2f7;
  color: #40516a;
  font-size: .58rem;
  font-weight: 800;
}
@media (max-width: 700px) {
  .psc-message-stack { max-width: 84%; }
  .psc-message-read-label { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
}