/* ============================================================
   comms.css
   ------------------------------------------------------------
   Communications UI — covers both:
     • Admin panel classes:    .comms-panel, .cm-*, .cm-dialog__*
     • Student-facing classes: .comms-center, .comms-tabs,
                               .comms-feed, .comms-item,
                               .comms-bell, .comms-dm
   ============================================================ */

/* ─────────────────────────────────────────────
   Admin — panel container & sub-tabs
   ───────────────────────────────────────────── */
.comms-panel {
  display: grid;
  gap: var(--space-4, 1rem);
}

.cm-subtabs {
  display: inline-flex;
  gap: 0.25rem;
  padding: 0.25rem;
  background: var(--color-surface-alt, #fafbfc);
  border: 1px solid var(--color-border, #e5e7eb);
  border-radius: var(--radius-md, 10px);
  width: fit-content;
}
.cm-subtabs__btn {
  appearance: none;
  border: 0;
  background: transparent;
  padding: 0.4rem 0.9rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-muted, #6b7280);
  border-radius: var(--radius-sm, 6px);
  cursor: pointer;
  transition: background 120ms ease, color 120ms ease;
}
.cm-subtabs__btn:hover {
  color: var(--color-text, #111827);
}
.cm-subtabs__btn[aria-selected="true"] {
  background: var(--color-surface, #fff);
  color: var(--color-text, #111827);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}
.cm-sub-mount {
  display: grid;
  gap: var(--space-3, 0.75rem);
}

/* ─────────────────────────────────────────────
   Admin — announcements list
   ───────────────────────────────────────────── */
.cm-anns {
  display: grid;
  gap: var(--space-3, 0.75rem);
}
.cm-anns__bar {
  display: flex;
  justify-content: flex-end;
}
.cm-anns__list {
  display: grid;
  gap: var(--space-2, 0.5rem);
}

.cm-ann {
  display: grid;
  gap: 0.4rem;
  padding: var(--space-3, 0.75rem) var(--space-4, 1rem);
  border: 1px solid var(--color-border, #e5e7eb);
  border-radius: var(--radius-md, 10px);
  background: var(--color-surface, #fff);
}
.cm-ann__head {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.cm-ann__pin {
  color: var(--color-warning, #d97706);
  font-size: 0.875rem;
}
.cm-ann__title {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text, #111827);
  flex: 1 1 auto;
}
.cm-ann__date {
  font-size: 0.75rem;
  color: var(--color-text-muted, #6b7280);
}
.cm-ann__body {
  margin: 0;
  font-size: 0.875rem;
  color: var(--color-text, #111827);
  line-height: 1.55;
  white-space: pre-wrap;
  word-break: break-word;
}
.cm-ann__meta {
  display: flex;
  gap: 1rem;
  font-size: 0.75rem;
  color: var(--color-text-muted, #6b7280);
  flex-wrap: wrap;
}
.cm-ann__actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.4rem;
}

.cm-empty {
  padding: var(--space-5, 1.5rem);
  text-align: center;
  color: var(--color-text-muted, #6b7280);
  font-style: italic;
  border: 1px dashed var(--color-border, #e5e7eb);
  border-radius: var(--radius-md, 10px);
  background: var(--color-surface-alt, #fafbfc);
}

/* ─────────────────────────────────────────────
   Admin — push broadcast form
   ───────────────────────────────────────────── */
.cm-push {
  display: grid;
  gap: var(--space-3, 0.75rem);
  padding: var(--space-4, 1rem);
  border: 1px solid var(--color-border, #e5e7eb);
  border-radius: var(--radius-md, 10px);
  background: var(--color-surface, #fff);
}
.cm-push__title {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text, #111827);
}
.cm-push__hint {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--color-text-muted, #6b7280);
}
.cm-push__form {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: var(--space-3, 0.75rem);
}
.cm-push__footer {
  display: flex;
  justify-content: flex-end;
}

/* ─────────────────────────────────────────────
   Admin — dialog / overlay
   ───────────────────────────────────────────── */
.cm-overlay {
  position: fixed;
  inset: 0;
  background: rgba(17, 24, 39, 0.55);
  display: grid;
  place-items: center;
  padding: 1rem;
  z-index: 50;
  overflow: auto;
}
.cm-dialog {
  display: grid;
  grid-template-rows: auto 1fr auto;
  width: min(640px, 100%);
  max-height: min(90vh, 720px);
  background: var(--color-surface, #fff);
  border-radius: var(--radius-lg, 14px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.25);
  overflow: hidden;
}
.cm-dialog__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3, 0.75rem) var(--space-4, 1rem);
  border-bottom: 1px solid var(--color-border, #e5e7eb);
}
.cm-dialog__title {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text, #111827);
}
.cm-dialog__close {
  appearance: none;
  border: 0;
  background: transparent;
  font-size: 1.25rem;
  line-height: 1;
  color: var(--color-text-muted, #6b7280);
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm, 6px);
}
.cm-dialog__close:hover {
  background: var(--color-surface-alt, #fafbfc);
  color: var(--color-text, #111827);
}
.cm-dialog__body {
  display: grid;
  gap: var(--space-3, 0.75rem);
  padding: var(--space-4, 1rem);
  overflow: auto;
}
.cm-dialog__row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));
  gap: var(--space-3, 0.75rem);
  align-items: end;
}
.cm-dialog__textarea {
  min-height: 6.5rem;
  resize: vertical;
  line-height: 1.55;
  font-family: inherit;
}
.cm-dialog__foot {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  padding: var(--space-3, 0.75rem) var(--space-4, 1rem);
  border-top: 1px solid var(--color-border, #e5e7eb);
  background: var(--color-surface-alt, #fafbfc);
}

/* ─────────────────────────────────────────────
   Student — Comms center wrapper
   ───────────────────────────────────────────── */
.comms-center {
  display: grid;
  gap: var(--space-4, 1rem);
  max-width: 900px;
  margin: 0 auto;
  padding: var(--space-4, 1rem);
}
.comms-center__header {
  display: grid;
  gap: 0.25rem;
}
.comms-center__title {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text, #111827);
}
.comms-center__sub {
  margin: 0;
  font-size: 0.875rem;
  color: var(--color-text-muted, #6b7280);
}

.comms-tabs {
  display: inline-flex;
  gap: 0.25rem;
  padding: 0.25rem;
  border: 1px solid var(--color-border, #e5e7eb);
  border-radius: var(--radius-md, 10px);
  background: var(--color-surface-alt, #fafbfc);
  width: fit-content;
}
.comms-tabs__btn {
  appearance: none;
  border: 0;
  background: transparent;
  padding: 0.4rem 0.9rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-muted, #6b7280);
  border-radius: var(--radius-sm, 6px);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
.comms-tabs__btn[aria-selected="true"] {
  background: var(--color-surface, #fff);
  color: var(--color-text, #111827);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}
.comms-badge {
  display: inline-grid;
  place-items: center;
  min-width: 1.1rem;
  height: 1.1rem;
  padding: 0 0.35rem;
  font-size: 0.6875rem;
  font-weight: 700;
  color: #fff;
  background: var(--color-danger, #dc2626);
  border-radius: 999px;
  line-height: 1;
}

/* ─────────────────────────────────────────────
   Student — feed of items (announcements + notifications)
   ───────────────────────────────────────────── */
.comms-feed {
  display: grid;
  gap: var(--space-2, 0.5rem);
}
.comms-item {
  display: grid;
  gap: 0.35rem;
  padding: var(--space-3, 0.75rem) var(--space-4, 1rem);
  border: 1px solid var(--color-border, #e5e7eb);
  border-radius: var(--radius-md, 10px);
  background: var(--color-surface, #fff);
  cursor: default;
}
.comms-item.is-unread {
  border-color: var(--color-primary, #2563eb);
  background: color-mix(in oklab, var(--color-primary, #2563eb) 6%, var(--color-surface, #fff));
}
.comms-item__head {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.comms-item__dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--color-primary, #2563eb);
  flex: 0 0 auto;
}
.comms-item__title {
  margin: 0;
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--color-text, #111827);
  flex: 1 1 auto;
}
.comms-item__pin {
  color: var(--color-warning, #d97706);
  font-size: 0.875rem;
}
.comms-item__date {
  font-size: 0.75rem;
  color: var(--color-text-muted, #6b7280);
}
.comms-item__body {
  margin: 0;
  font-size: 0.875rem;
  color: var(--color-text, #111827);
  line-height: 1.55;
  white-space: pre-wrap;
  word-break: break-word;
}
.comms-item__actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.4rem;
}

.comms-empty {
  padding: var(--space-6, 2rem) var(--space-5, 1.5rem);
  text-align: center;
  color: var(--color-text-muted, #6b7280);
  font-style: italic;
  border: 1px dashed var(--color-border, #e5e7eb);
  border-radius: var(--radius-md, 10px);
  background: var(--color-surface-alt, #fafbfc);
}

/* ─────────────────────────────────────────────
   Student — DM / conversations
   ───────────────────────────────────────────── */
.comms-dm {
  display: grid;
  grid-template-columns: minmax(14rem, 1fr) 2fr;
  gap: var(--space-3, 0.75rem);
  min-height: 24rem;
}
.comms-dm__left {
  display: grid;
  gap: 0.5rem;
  align-content: start;
}
.comms-dm__new {
  justify-self: stretch;
  width: 100%;
}
.comms-dm__list {
  display: grid;
  gap: 0.25rem;
  align-content: start;
  padding: 0.25rem;
  border: 1px solid var(--color-border, #e5e7eb);
  border-radius: var(--radius-md, 10px);
  background: var(--color-surface, #fff);
  max-height: 30rem;
  overflow: auto;
}

/* Contact picker overlay (新規会話) */
.comms-overlay {
  position: fixed;
  inset: 0;
  background: rgba(17, 24, 39, 0.55);
  display: grid;
  place-items: center;
  padding: 1rem;
  z-index: 60;
}
.comms-overlay__dialog {
  width: min(440px, 100%);
  max-height: min(80vh, 600px);
  background: var(--color-surface, #fff);
  border-radius: var(--radius-lg, 14px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.25);
  display: grid;
  grid-template-rows: auto 1fr;
  overflow: hidden;
}
.comms-overlay__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--color-border, #e5e7eb);
}
.comms-overlay__title {
  margin: 0;
  font-size: 1rem;
  font-weight: 800;
  color: var(--color-text, #111827);
}
.comms-overlay__close {
  appearance: none;
  border: 0;
  background: transparent;
  font-size: 1.25rem;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm, 6px);
  cursor: pointer;
  color: var(--color-text-muted, #6b7280);
}
.comms-overlay__close:hover {
  background: var(--color-surface-alt, #fafbfc);
  color: var(--color-text, #111827);
}
.comms-overlay__body {
  padding: 0.75rem 1rem 1rem;
  display: grid;
  gap: 0.5rem;
  overflow: hidden;
  grid-template-rows: auto 1fr;
}
.comms-overlay__filter {
  height: 2.25rem;
  padding: 0 0.6rem;
  border: 1px solid var(--color-border, #e5e7eb);
  border-radius: var(--radius-sm, 6px);
  font-size: 0.875rem;
}
.comms-overlay__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.2rem;
  overflow: auto;
}
.comms-overlay__item {
  appearance: none;
  width: 100%;
  text-align: left;
  padding: 0.5rem 0.7rem;
  border: 1px solid var(--color-border, #e5e7eb);
  border-radius: var(--radius-sm, 6px);
  background: var(--color-surface, #fff);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  font-size: 0.875rem;
}
.comms-overlay__item:hover {
  background: var(--color-surface-alt, #fafbfc);
  border-color: color-mix(in oklab, var(--color-primary, #2563eb) 40%, #fff);
}
.comms-overlay__item-name {
  color: var(--color-text, #111827);
  font-weight: 600;
}
.comms-overlay__item-tag {
  font-size: 0.6875rem;
  font-weight: 700;
  padding: 0.1rem 0.45rem;
  border-radius: 999px;
  color: var(--color-primary, #2563eb);
  background: color-mix(in oklab, var(--color-primary, #2563eb) 12%, #fff);
  border: 1px solid color-mix(in oklab, var(--color-primary, #2563eb) 40%, #fff);
}

/* Top menu + mobile tabbar unread badge */
.app-menu__item,
.mobile-tabbar__item {
  position: relative;
}
.nav-badge {
  position: absolute;
  top: 4px;
  right: 4px;
  min-width: 1rem;
  height: 1rem;
  padding: 0 0.3rem;
  font-size: 0.625rem;
  font-weight: 700;
  color: #fff;
  background: var(--color-danger, #dc2626);
  border-radius: 999px;
  display: inline-grid;
  place-items: center;
  line-height: 1;
  pointer-events: none;
}
.mobile-tabbar__item .nav-badge {
  top: 2px;
  right: 18%;
}
.comms-dm__convo {
  appearance: none;
  text-align: left;
  border: 0;
  background: transparent;
  padding: 0.6rem 0.75rem;
  border-radius: var(--radius-sm, 6px);
  cursor: pointer;
  display: grid;
  gap: 0.15rem;
}
.comms-dm__convo:hover {
  background: var(--color-surface-alt, #fafbfc);
}
.comms-dm__convo[aria-selected="true"] {
  background: color-mix(in oklab, var(--color-primary, #2563eb) 10%, var(--color-surface, #fff));
}
.comms-dm__convo-name {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text, #111827);
}
.comms-dm__convo-snip {
  font-size: 0.75rem;
  color: var(--color-text-muted, #6b7280);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.comms-dm__thread {
  display: grid;
  grid-template-rows: 1fr auto;
  border: 1px solid var(--color-border, #e5e7eb);
  border-radius: var(--radius-md, 10px);
  background: var(--color-surface, #fff);
  overflow: hidden;
  min-height: 24rem;
}
.comms-dm__msgs {
  padding: var(--space-3, 0.75rem);
  overflow: auto;
  display: grid;
  gap: 0.4rem;
  align-content: start;
  max-height: 28rem;
}
.comms-msg {
  max-width: 80%;
  padding: 0.45rem 0.7rem;
  border-radius: var(--radius-md, 10px);
  background: var(--color-surface-alt, #fafbfc);
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--color-text, #111827);
  white-space: pre-wrap;
  word-break: break-word;
}
.comms-msg.is-mine {
  justify-self: end;
  background: color-mix(in oklab, var(--color-primary, #2563eb) 14%, var(--color-surface, #fff));
}
.comms-msg__meta {
  font-size: 0.6875rem;
  color: var(--color-text-muted, #6b7280);
  margin-top: 0.15rem;
}

.comms-dm__compose {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.4rem;
  padding: var(--space-2, 0.5rem);
  border-top: 1px solid var(--color-border, #e5e7eb);
  background: var(--color-surface-alt, #fafbfc);
}
.comms-dm__compose textarea {
  min-height: 2.5rem;
  resize: vertical;
  padding: 0.45rem 0.6rem;
  border: 1px solid var(--color-border, #e5e7eb);
  border-radius: var(--radius-sm, 6px);
  font-family: inherit;
  font-size: 0.875rem;
}

/* ─────────────────────────────────────────────
   Responsive
   ───────────────────────────────────────────── */
@media (max-width: 720px) {
  .comms-dm {
    grid-template-columns: 1fr;
  }
  .comms-dm__list {
    max-height: 14rem;
  }
  .comms-dm__left {
    gap: 0.4rem;
  }
  .cm-dialog__row {
    grid-template-columns: 1fr;
  }
  .cm-push__form {
    grid-template-columns: 1fr;
  }
}