/* Student-only PWA: login (desktop + phone) and in-app phone tab bar. */

:root {
  --student-app-accent: #0284c7;
  --student-app-accent-dark: #0369a1;
  --student-app-bg: #f0f9ff;
  --student-app-ink: #0f172a;
  --student-app-muted: #475569;
  --student-app-tab-h: 4.15rem;
}

body.student-app-login {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--student-app-ink);
  background:
    radial-gradient(circle at 12% 18%, rgba(14, 165, 233, 0.16), transparent 42%),
    radial-gradient(circle at 88% 82%, rgba(2, 132, 199, 0.12), transparent 40%),
    linear-gradient(160deg, #e0f2fe 0%, #f8fafc 48%, #ecfeff 100%);
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}

.student-app-login__shell {
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  grid-template-columns: 1fr;
  max-width: 72rem;
  margin: 0 auto;
}

.student-app-login__brand {
  padding: 1.75rem 1.35rem 0.75rem;
  text-align: center;
}

.student-app-login__seal {
  width: 4.75rem;
  height: 4.75rem;
  border-radius: 50%;
  object-fit: contain;
  background: #fff;
  padding: 0.28rem;
  box-shadow: 0 10px 28px rgba(2, 132, 199, 0.18);
}

.student-app-login__kicker {
  margin: 0.85rem 0 0.2rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--student-app-accent-dark);
}

.student-app-login__brand h1 {
  margin: 0;
  font-size: 1.65rem;
  letter-spacing: -0.03em;
}

.student-app-login__lead {
  margin: 0.45rem auto 0;
  max-width: 28rem;
  color: var(--student-app-muted);
  font-size: 0.95rem;
  line-height: 1.5;
}

.student-app-login__points {
  list-style: none;
  margin: 1rem auto 0;
  padding: 0;
  max-width: 22rem;
  text-align: left;
  color: var(--student-app-muted);
  font-size: 0.88rem;
}

.student-app-login__points li {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  margin-bottom: 0.4rem;
}

.student-app-login__points i {
  color: var(--student-app-accent);
  width: 1.1rem;
  text-align: center;
}

.student-app-login__panel {
  padding: 1rem 1.25rem 2rem;
}

.student-app-login__panel h2 {
  margin: 0 0 0.25rem;
  font-size: 1.35rem;
}

.student-app-login__hint {
  margin: 0 0 1rem;
  color: var(--student-app-muted);
  font-size: 0.9rem;
  line-height: 1.45;
}

.student-app-login__alert {
  background: #fef2f2;
  color: #991b1b;
  border: 1px solid #fecaca;
  border-radius: 0.9rem;
  padding: 0.75rem 0.9rem;
  font-size: 0.88rem;
  margin-bottom: 1rem;
}

.student-app-login__label {
  display: block;
  font-size: 0.8rem;
  font-weight: 650;
  margin: 0 0 0.35rem;
}

.student-app-login__input {
  width: 100%;
  box-sizing: border-box;
  margin-bottom: 0.9rem;
  padding: 0.85rem 0.95rem;
  border: 1.5px solid #dbeafe;
  border-radius: 0.9rem;
  font-size: 1rem;
  background: #fff;
}

.student-app-login__input:focus {
  outline: none;
  border-color: var(--student-app-accent);
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.18);
}

.student-app-login__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  width: 100%;
  box-sizing: border-box;
  border: none;
  border-radius: 0.9rem;
  padding: 0.9rem 1rem;
  background: var(--student-app-accent);
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  cursor: pointer;
  box-shadow: 0 8px 18px rgba(2, 132, 199, 0.22);
}

.student-app-login__btn:hover,
.student-app-login__btn:focus-visible {
  background: var(--student-app-accent-dark);
  color: #fff;
}

.student-app-login__btn--small {
  width: auto;
  padding: 0.45rem 0.85rem;
  font-size: 0.85rem;
  box-shadow: none;
}

.student-app-login__link {
  display: block;
  text-align: center;
  margin-top: 0.85rem;
  color: var(--student-app-accent-dark);
  font-weight: 650;
  font-size: 0.9rem;
  text-decoration: none;
}

.student-app-login__link--muted {
  color: var(--student-app-muted);
  font-weight: 500;
}

.student-app-login__text-btn {
  border: none;
  background: transparent;
  color: var(--student-app-muted);
  font-size: 0.8rem;
  cursor: pointer;
  padding: 0.35rem 0.2rem;
}

.student-app-install-banner {
  margin-top: 1.35rem;
  padding: 0.9rem;
  border-radius: 1rem;
  background: #fff;
  border: 1px solid #bae6fd;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.06);
}

.student-app-install-banner p {
  margin: 0.2rem 0 0;
  color: var(--student-app-muted);
  font-size: 0.82rem;
}

.student-app-install-banner__actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.7rem;
}

.student-app-ios-sheet {
  position: fixed;
  inset: 0;
  z-index: 1080;
  background: rgba(15, 23, 42, 0.45);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 1rem;
  padding-bottom: calc(1rem + env(safe-area-inset-bottom));
}

.student-app-ios-sheet[hidden] {
  display: none;
}

.student-app-ios-sheet__card {
  width: min(28rem, 100%);
  background: #fff;
  border-radius: 1.15rem;
  padding: 1.15rem 1.2rem 1.25rem;
}

.student-app-ios-sheet__card h3 {
  margin: 0 0 0.65rem;
}

.student-app-ios-sheet__card ol {
  margin: 0 0 1rem;
  padding-left: 1.2rem;
  color: var(--student-app-muted);
  line-height: 1.55;
  font-size: 0.92rem;
}

@media (min-width: 992px) {
  .student-app-login__shell {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: stretch;
    min-height: 100vh;
  }

  .student-app-login__brand {
    display: flex;
    flex-direction: column;
    justify-content: center;
    text-align: left;
    padding: 3rem 3rem 3rem 2.5rem;
  }

  .student-app-login__lead,
  .student-app-login__points {
    margin-left: 0;
    margin-right: 0;
  }

  .student-app-login__panel {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 3rem 2.5rem;
  }

  .student-app-login__form,
  .student-app-install-banner,
  .student-app-login__alert {
    max-width: 26rem;
  }

  .student-app-ios-sheet {
    align-items: center;
  }
}

/* Logged-in student chrome */
body.app-shell-sidebar--student {
  padding-bottom: 0;
}

.student-app-tabbar {
  display: none;
}

.student-app-page-install {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.65rem;
  margin-bottom: 1rem;
  padding: 0.75rem 0.9rem;
  border: 1px solid rgba(2, 132, 199, 0.22);
  border-radius: 0.9rem;
  background: rgba(14, 165, 233, 0.08);
}

.student-app-page-install p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--student-app-muted, #475569);
}

html[data-bs-theme="dark"] .student-app-page-install {
  background: rgba(14, 165, 233, 0.12);
  border-color: rgba(125, 211, 252, 0.25);
}

@media (max-width: 991.98px) {
  .student-app-tabbar {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1040;
    height: calc(var(--student-app-tab-h) + env(safe-area-inset-bottom));
    padding: 0.2rem 0.2rem calc(0.28rem + env(safe-area-inset-bottom));
    background: var(--bs-body-bg, #fff);
    border-top: 1px solid rgba(15, 23, 42, 0.08);
    box-shadow: 0 -8px 24px rgba(15, 23, 42, 0.06);
  }

  body.app-shell-sidebar--student .admin-main-wrap > main.app-main {
    padding-bottom: calc(var(--student-app-tab-h) + env(safe-area-inset-bottom) + 0.75rem) !important;
  }

  .student-app-tab {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.12rem;
    min-width: 0;
    text-decoration: none;
    color: #64748b;
    font-size: 0.62rem;
    font-weight: 650;
    letter-spacing: 0.01em;
    cursor: pointer;
    margin: 0;
    border: 0;
    background: transparent;
    -webkit-tap-highlight-color: transparent;
  }

  .student-app-tab.is-active {
    color: var(--student-app-accent);
  }

  .student-app-tab__icon {
    position: relative;
    font-size: 1.05rem;
    line-height: 1;
  }

  .student-app-tab__label {
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .student-app-tab__badge {
    position: absolute;
    top: -0.45rem;
    right: -0.7rem;
    min-width: 1rem;
    height: 1rem;
    padding: 0 0.22rem;
    border-radius: 999px;
    background: #dc2626;
    color: #fff;
    font-size: 0.58rem;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
}

@media (display-mode: standalone), (display-mode: minimal-ui) {
  body.app-shell-sidebar--student .admin-topbar {
    padding-top: env(safe-area-inset-top);
  }

  body.student-app-standalone.app-shell-sidebar--student .admin-sidebar-brand-text {
    font-size: 0.95rem;
  }
}

html[data-bs-theme="dark"] .student-app-tabbar {
  background: var(--bs-body-bg);
  border-top-color: rgba(255, 255, 255, 0.12);
  box-shadow: 0 -8px 24px rgba(0, 0, 0, 0.28);
}

html[data-bs-theme="dark"] .student-app-tab {
  color: #94a3b8;
}

html[data-bs-theme="dark"] .student-app-tab.is-active {
  color: #38bdf8;
}

.student-subject-dash-card {
  background: var(--bs-body-bg, #fff);
}

html[data-bs-theme="dark"] .student-subject-dash-card {
  background: rgba(15, 23, 42, 0.35);
}

.student-topic-list .list-group-item:last-child {
  border-bottom: 0;
}

.offline-week-open {
  border: 0;
  background: var(--bs-light, #f8fafc);
}

.offline-week-open[aria-expanded="true"] {
  background: rgba(2, 132, 199, 0.08);
}

.offline-week-box .offline-choose-item.active {
  border-color: #0284c7;
  background: rgba(2, 132, 199, 0.08);
}

.student-offline-jump-card .form-label {
  margin-bottom: 0.25rem;
}

.student-faculty-topic-row:last-child {
  margin-bottom: 0 !important;
}