/* 學生平台 — 手機／平板／桌面響應式與觸控 */

@media (max-width: 1023px) {
  .portal-app {
    grid-template-columns: 1fr;
    padding-bottom: calc(64px + env(safe-area-inset-bottom, 0px));
  }

  .portal-sidebar {
    display: none;
  }

  .portal-chip--desktop-student {
    display: none;
  }

  .portal-topbar__student {
    display: inline-flex;
    max-width: min(42vw, 10rem);
  }

  .portal-topbar {
    padding-top: calc(0.75rem + env(safe-area-inset-top, 0px));
    gap: 0.5rem;
    min-width: 0;
  }

  .portal-topbar h2 {
    font-size: 1.05rem;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .portal-topbar__meta {
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 0.35rem;
    min-width: 0;
    max-width: 55%;
  }

  .portal-chip,
  .portal-chip--club,
  #portalActiveStudentName {
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .portal-topbar__student select {
    max-width: 100%;
  }

  .portal-content {
    padding: 1rem;
    padding-bottom: calc(1rem + env(safe-area-inset-bottom, 0px));
  }

  .portal-bottom-nav {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 20;
    background: var(--sw-surface);
    border-top: 1px solid var(--sw-border);
    padding: 0.35rem 0.25rem calc(0.35rem + env(safe-area-inset-bottom, 0px));
  }

  .portal-bottom-nav__item {
    appearance: none;
    border: none;
    background: transparent;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.15rem;
    font-size: 0.68rem;
    color: var(--sw-text-subtle);
    cursor: pointer;
    padding: 0.35rem 0.15rem;
    min-height: 44px;
  }

  .portal-bottom-nav__item span {
    font-size: 1.1rem;
    line-height: 1;
  }

  .portal-bottom-nav__item.is-active {
    color: var(--sw-primary-dark);
    font-weight: 700;
  }

  .portal-actions .portal-btn {
    min-height: 48px;
  }

  .portal-icon-btn {
    width: 44px;
    height: 44px;
    min-width: 44px;
    min-height: 44px;
  }

  .portal-btn--sm {
    min-height: 44px;
    padding: 0.55rem 0.85rem;
  }

  .portal-msg-tabs__btn {
    min-height: 44px;
    padding: 0.55rem 0.9rem;
  }

  .portal-cal__cell {
    min-height: 44px;
    font-size: 0.78rem;
  }

  .portal-msg-tabs {
    top: calc(3.25rem + env(safe-area-inset-top, 0px));
  }

  /* 避免 iOS Safari 聚焦自動縮放 */
  .portal-fg input,
  .portal-fg select,
  .portal-fg textarea,
  .portal-topbar__student select,
  .portal-login .portal-fg input {
    font-size: 16px;
  }

  .portal-welcome__club,
  .portal-welcome__hello,
  .portal-card__title,
  .portal-card__meta,
  .portal-kv dd,
  .portal-kv dt {
    overflow-wrap: anywhere;
    word-break: break-word;
  }

  .portal-content a,
  .portal-content button[data-download],
  .portal-content li {
    overflow-wrap: anywhere;
    word-break: break-word;
  }

  .portal-modal__sheet {
    max-height: min(92dvh, calc(100vh - env(safe-area-inset-top, 0px) - env(safe-area-inset-bottom, 0px)));
    padding-bottom: env(safe-area-inset-bottom, 0px);
  }

  .portal-modal__body {
    max-height: min(70dvh, 70vh);
    overflow: auto;
    -webkit-overflow-scrolling: touch;
  }
}

@media (max-width: 767px) {
  .portal-grid {
    grid-template-columns: 1fr;
  }

  .portal-cal__grid {
    gap: 0;
  }

  .portal-progress-row {
    grid-template-columns: 3.5rem 1fr 1.75rem;
    gap: 0.35rem;
    font-size: 0.8rem;
  }

  .portal-kv {
    grid-template-columns: 5.5rem 1fr;
  }
}

@media (max-width: 375px) {
  .portal-topbar {
    padding-left: 0.65rem;
    padding-right: 0.65rem;
  }

  .portal-content {
    padding-left: 0.75rem;
    padding-right: 0.75rem;
  }

  .portal-kv {
    grid-template-columns: 1fr;
    gap: 0.15rem 0;
  }

  .portal-kv dt {
    margin-top: 0.45rem;
  }

  .portal-bottom-nav__item {
    font-size: 0.62rem;
  }
}

@media (max-width: 320px) {
  .portal-welcome {
    gap: 0.5rem;
  }

  .portal-welcome__logo {
    width: 32px;
    height: 32px;
  }

  .portal-cal__dow,
  .portal-cal__cell {
    min-height: 40px;
    padding: 0.35rem 0.05rem;
    font-size: 0.7rem;
  }

  .portal-msg-tabs {
    gap: 0.25rem;
  }

  .portal-msg-tabs__btn {
    padding-left: 0.65rem;
    padding-right: 0.65rem;
    font-size: 0.8rem;
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .portal-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .portal-bottom-nav {
    display: none !important;
  }

  .portal-topbar__student {
    display: none !important;
  }

  .portal-app {
    padding-bottom: 0;
  }
}