:root {
  --bg: #777;
  --panel: #c0c0c0;
  --soft-panel: #f5f5f5;
  --teal: #008080;
  --teal-dark: #008080;
  --teal-mid: #008080;
  --student-primary: #234569;
  --student-dark: #234569;
  --text: #2f2f2f;
  --white: #f5f5f5;
  --shadow: rgba(0, 0, 0, 0.25);
  --font-main: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-heading: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}
body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-main);
  display: flex;
  justify-content: center;
  align-items: stretch;
  padding: 10px;
  -webkit-tap-highlight-color: transparent;
}

.app-shell {
  width: 100%;
  max-width: 520px;
  min-height: calc(100vh - 20px);
  display: flex;
  align-items: center;
  justify-content: center;
}

.screen {
  display: none;
  width: 100%;
  background: var(--panel);
  border-radius: 18px;
  box-shadow: 0 8px 18px var(--shadow);
  padding: 18px;
  text-align: center;
}

.screen.active {
  display: block;
}

h1,
h2,
h3 {
  font-family: var(--font-heading);
  letter-spacing: 0.02em;
  font-weight: 700;
  margin-top: 0;
  color: var(--teal);
}

.admin-theme {
  background: #a8a8a8;
}

.admin-theme h2,
.admin-theme h3 {
  color: var(--teal-dark);
}

.student-theme {
  background: #a8a8a8;
}


.student-theme h1 {color: var(--student-dark);}
.student-theme h2 {color: var(--student-dark);}
.student-theme h3 { color: var(--student-dark);}

.student-theme {
  --teal: #234569;
  --teal-dark: #234569;
  --teal-mid: #234569;
}

.student-theme .auth-box {
  border-color: rgba(35, 69, 105, 0.35);
}

.student-theme input,
.student-theme select {
  border-color: #234569;
  color: #234569;
}

.student-theme button {
  background: #234569;
}

.student-theme h1,
.student-theme h2,
.student-theme h3 {
  color: #234569;
}

.app-logo {
  width: 38vw;
  max-width: 200px;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 8px;
  margin: 0 auto 15px;
  display: block;
    background-color: transparent;

}


#auth-screen.student-theme {
  --teal: #234569;
  --teal-dark: #234569;
  --teal-mid: #234569;
  --student-primary: #234569;
  --student-dark: #234569;
}

#auth-screen.student-theme h1,
#auth-screen.student-theme h2,
#auth-screen.student-theme h3 {
  color: #234569;
}

#auth-screen.student-theme button {
  background: #234569;
}

#auth-screen.student-theme input,
#auth-screen.student-theme select {
  border-color: #234569;
  color: #234569;
}

#auth-screen.student-theme .auth-box {
  border-color: rgba(35, 69, 105, 0.35);
}


.subtitle,
.helper-text,
.mini-text {
  color: #444;
  font-size: 0.95rem;
  line-height: 1.4;
}

.auth-box {
  background: var(--soft-panel);
  border-radius: 14px;
  padding: 16px;
  margin-top: 18px;
  border: 1px solid rgba(0, 128, 128, 0.25);
}

.hidden {
  display: none;
}

input,
select {
  width: 100%;
  padding: 13px;
  border-radius: 10px;
  border: 1px solid var(--teal);
  font-size: 1rem;
  color: var(--teal-dark);
  margin: 10px 0 14px;
  background: var(--white);
}

#modify-subject-select {
  min-height: 64px;
  padding: 18px;
  font-size: 1.1rem;
}


button {
  border: 0;
  border-radius: 10px;
  padding: 13px 16px;
  font-size: 1rem;
  font-family: var(--font-main);
  font-weight: 700;
  letter-spacing: 0.02em;
  cursor: pointer;
  color: var(--white);
  background: var(--teal);
  box-shadow: 0 4px 8px rgba(0,0,0,0.16);
  width: 100%;
  min-height: 48px;
}

button:active {
  transform: scale(0.97);
}

.admin-theme button {
  background: var(--teal-dark);
}

.student-theme button {
  background: var(--student-dark);
}

.small-btn {
  width: auto;
  min-height: 38px;
  padding: 8px 12px;
  font-size: 0.85rem;
}

.top-bar,
.nav-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  text-align: left;
  border-bottom: 2px solid rgba(0, 0, 0, 0.18);
  padding-bottom: 12px;
  margin-bottom: 18px;
}

.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.home-card {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 14px;
  text-align: left;
  padding: 18px;
}

.card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.2);
  border-radius: 50%;
  width: 36px;
  height: 36px;
  color: white;
  font-family: var(--font-main);
  font-weight: bold;
}

.list-stack {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.list-btn {
  text-align: left;
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap; 
  overflow-x: auto;
   flex-shrink: 0; 
  gap: 10px;     
  justify-content: space-between;
  align-items: center;
}

.dashboard-section {
  background: var(--soft-panel);
  border-radius: 14px;
  padding: 14px;
  margin-bottom: 14px;
  text-align: left;
}

.task-card {
  background: #f5f5f5;
  border-radius: 14px;
  padding: 14px;
  text-align: left;
  border-left: 6px solid var(--student-dark);
  box-shadow: 0 2px 5px rgba(0,0,0,0.08);
  margin-bottom: 10px;
}

.admin-task-card {
  border-left-color: var(--teal-dark);
}

.task-title {
  font-weight: bold;
  color: #222;
  margin-bottom: 5px;
}

.task-meta {
  font-size: 0.85rem;
  color: #555;
}


.status-pill {
  display: inline-block;     
  
  margin-top: 10px;
  padding: 6px 9px;
  border-radius: 999px;
  font-size: 0.8rem;
  background: #e5e4e2;
  color: #222;
}

.error-message {
  color: #8b0000;
  font-weight: bold;
  min-height: 20px;
}

.stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.stat-card {
  background: var(--soft-panel);
  border-radius: 14px;
  padding: 14px;
  text-align: center;
}

.stat-number {
  font-size: 2rem;
  font-weight: bold;
  color: var(--teal-dark);
}
.subject-panel h3 {
  margin-bottom: 14px;
}

.subject-add-row {
  display: grid;
  grid-template-columns: 1fr 52px;
  gap: 8px;
  align-items: center;
  margin-bottom: 10px;
}

.subject-add-row input {
  margin: 0;
}

.enter-btn {
  width: 52px;
  min-width: 52px;
  height: 52px;
  padding: 0;
  border-radius: 14px;
  font-size: 1.4rem;
  font-family: var(--font-main);
}

.pending-subject-chip {
  background: #e5e4e2;
  color: #333;
  border-radius: 999px;
  padding: 8px 12px;
  margin: 6px 0;
  font-size: 0.95rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.pending-subject-chip button {
  width: auto;
  min-height: 28px;
  padding: 4px 8px;
  font-size: 0.75rem;
  margin-left: 8px;
}

.save-btn {
  margin-top: 12px;
}

#modify-subject-box {
  margin-top: 12px;
}

.status-action-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  align-items: center;
  margin: 12px 0;
}

.status-display {
  background: #e5e4e2;
  color: #333;
  border-radius: 12px;
  padding: 12px;
  font-weight: bold;
  text-align: left;
  font-size: 0.95rem;
}

.status-toggle-btn {
  width: auto;
  min-width: 130px;
  min-height: 44px;
  padding: 10px 12px;
  font-size: 0.8rem;
}

@media (max-width: 420px) {
  .status-action-row {
    grid-template-columns: 1fr;
  }

  .status-toggle-btn {
    width: 100%;
  }
}

.subject-heading {
  background: var(--teal-dark);
  color: var(--white);
  padding: 10px 12px;
  border-radius: 12px;
  font-family: var(--font-heading);
  letter-spacing: 0.02em;
  text-align: left;
  margin-top: 12px;
}

.student-theme .subject-heading {
  background: var(--student-dark);
}

.progress-bar-wrap {
  background: #ddd;
  height: 10px;
  border-radius: 999px;
  overflow: hidden;
  margin-top: 8px;
}

.progress-bar-fill {
  height: 100%;
  background: var(--teal-dark);
  border-radius: 999px;
}

.student-theme .progress-bar-fill {
  background: var(--student-dark);
}

.task-actions {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  margin-top: 12px;
}

.task-status-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.clickable-card {
  cursor: pointer;
}

.mini-progress-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 10px;
}

.mini-progress-box {
  background: #e5e4e2;
  border-radius: 12px;
  padding: 10px;
  text-align: center;
}

.mini-progress-number {
  font-size: 1.4rem;
  font-weight: bold;
  color: var(--teal-dark);
}

.progress-list-button {
  background: var(--teal);
  color: var(--white);
  border-radius: 16px;
  padding: 16px;
  margin-bottom: 10px;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  text-align: left;
  gap: 10px;
}

.progress-list-title {
  font-family: var(--font-heading);
  letter-spacing: 0.02em;
  font-size: 1.1rem;
}

.progress-indicators {
  display: flex;
  flex-direction: column;
  gap: 6px;
  align-items: flex-end;
}

.progress-pill {
  background: #e5e4e2;
  color: var(--teal);
  padding: 5px 10px;
  border-radius: 999px;
  font-size: 0.85rem;
  white-space: nowrap;
}

.student-status-row {
  background: #696969;
  color: var(--white);
  border-radius: 8px;
  padding: 12px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 8px;
  align-items: center;
  margin-bottom: 5px;
  text-align: left;
}

.student-status-name {
  font-weight: bold;
}

.status-action {
  text-align: center;
  color: #C0C0C0 ;
  cursor: pointer;
  font-size: 0.85rem;
}

.status-tick {
  font-size: 1.4rem;
  font-weight: bold;
}

.group-heading {
  background: var(--teal);
  color: var(--white);
  padding: 10px;
  border-radius: 8px;
  text-align: center;
  font-family: var(--font-heading);
  margin: 15px 0 8px;
}

@media (max-width: 520px) {
  .student-status-row {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .student-status-name {
    text-align: center;
  }
}

.status-action {
  min-height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.save-btn {
  margin-top: 16px;
}

.progress-list-button {
  background: var(--teal);
  color: var(--white);
  border-radius: 16px;
  padding: 16px;
  margin-bottom: 10px;
  display: grid;
  grid-template-columns: 1fr 220px;
  align-items: center;
  text-align: left;
  gap: 14px;
}

.progress-list-title {
  font-family: var(--font-heading);
  letter-spacing: 0.02em;
  font-size: 1.1rem;
}

.progress-bars {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.progress-bar-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.progress-bar-label {
  width: 68px;
  font-size: 0.78rem;
  color: var(--white);
  opacity: 0.95;
  text-align: right;
}

.progress-track {
  flex: 1;
  height: 14px;
  background: silver;
  border: 1px solid rgba(255,255,255,0.85);
  border-radius: 999px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  border-radius: 999px;
}

.progress-fill-complete {
  background: limegreen;
}

.progress-fill-verified {
  background: gold;
}

.student-status-row {
  background: #696969;
  color: var(--white);
  border-radius: 8px;
  padding: 12px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 8px;
  align-items: center;
  margin-bottom: 5px;
  text-align: left;
}

.student-status-name {
  font-weight: bold;
}

.status-action {
  text-align: center;
  cursor: pointer;
  font-size: 0.85rem;
  min-height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.status-tick {
  font-size: 1.4rem;
  font-weight: bold;
}

.status-tick-complete {
  color: limegreen;
}

.status-tick-verified {
  color: gold;
}

.group-heading {
  background: var(--teal);
  color: var(--white);
  padding: 10px;
  border-radius: 8px;
  text-align: center;
  font-family: var(--font-heading);
  margin: 15px 0 8px;
}

@media (max-width: 700px) {
  .progress-list-button {
    grid-template-columns: 1fr;
  }

  .progress-bar-label {
    width: 60px;
    font-size: 0.74rem;
  }
}

@media (max-width: 520px) {
  .student-status-row {
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    overflow-x: auto;
    gap: 8px;
    align-items: center;
    text-align: left;
    padding: 10px;
  }

  .student-status-name {
    flex: 1 0 110px;
    min-width: 110px;
    text-align: left;
    font-size: 0.95rem;
    line-height: 1.05;
    overflow-wrap: anywhere;
  }

  .status-action {
    flex: 0 0 82px;
    width: 82px;
    min-width: 82px;
    min-height: 44px;
    font-size: 0.68rem;
    line-height: 1.05;
    white-space: normal;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .status-tick {
    font-size: 1.6rem;
  }
}

@media (min-width: 600px) {
  .card-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.progress-button-list {
  display: grid;
  gap: 14px;
  margin-top: 16px;
}

.progress-drill-button {
  width: 100%;
  border: 1px solid rgba(192, 192, 192, 0.45);
  background: rgba(255, 255, 255, 0.06);
  border-radius: 18px;
  padding: 16px;
  text-align: left;
  cursor: pointer;
  color: inherit;
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.12);
}

.progress-drill-button:hover {
  transform: translateY(-1px);
  border-color: rgba(255, 255, 255, 0.45);
}

.progress-button-title {
  display: block;
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.dual-progress {
  display: grid;
  gap: 8px;
}

.progress-line {
  display: grid;
  grid-template-columns: 76px 1fr;
  align-items: center;
  gap: 10px;
}

.progress-label {
  font-size: 0.78rem;
  opacity: 0.82;
}

.progress-track {
  display: block;
  height: 9px;
  overflow: hidden;
  border-radius: 999px;
  background: silver;
}

.progress-fill {
  display: block;
  height: 100%;
  border-radius: inherit;
}

.progress-fill-complete {
  background: limegreen;
}

.progress-fill-verified {
  background: gold;
}

.progress-header-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.progress-group-block {
  margin-top: 18px;
}

.progress-group-block h4 {
  margin: 0 0 10px;
  font-size: 0.95rem;
  opacity: 0.9;
}

.progress-student-list {
  display: grid;
  gap: 10px;
}

.progress-student-row {
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 10px;
  padding: 12px;
  border: 1px solid rgba(192, 192, 192, 0.35);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.045);
}

.progress-student-name {
  font-weight: 650;
}

.status-toggle {
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 7px 11px;
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.06);
}

.status-toggle.is-complete {
  color: limegreen;
  border-color: rgba(50, 205, 50, 0.45);
}

.status-toggle.is-verified {
  color: gold;
  border-color: rgba(255, 215, 0, 0.5);
}

.status-toggle.is-off {
  color: lightgrey;
  border-color: rgba(211, 211, 211, 0.25);
}

.save-progress-button {
  margin-top: 20px;
  width: 100%;
}

@media (max-width: 640px) {
  .progress-student-row {
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    overflow-x: auto;
    gap: 8px;
    align-items: center;
    text-align: left;
    padding: 10px;
  }

  .progress-student-name {
    flex: 1 0 110px;
    min-width: 110px;
    text-align: left;
    font-size: 0.95rem;
    line-height: 1.05;
    overflow-wrap: anywhere;
  }

  .status-toggle {
    flex: 0 0 82px;
    width: 82px;
    min-width: 82px;
    min-height: 44px;
    padding: 5px 4px;
    font-size: 0.68rem;
    line-height: 1.05;
    white-space: normal;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
  }
}


/* Reusable Save Changes and Return button */
.save-return-btn {
  width: auto;
  min-width: 155px;
  min-height: 44px;
  padding: 10px 14px;
  border-radius: 10px;
  font-size: 0.85rem;
  white-space: nowrap;
  text-align: center;
}

.save-return-btn:disabled {
  opacity: 0.65;
  cursor: wait;
}

/* Progress headers: stronger teal divider under the header */
#progress-subjects-screen .nav-header,
#progress-tasks-screen .nav-header,
#progress-task-students-screen .nav-header {
  border-bottom: 3px solid var(--teal);
}

.student-theme#progress-subjects-screen .nav-header,
.student-theme#progress-tasks-screen .nav-header,
.student-theme#progress-task-students-screen .nav-header {
  border-bottom-color: var(--student-dark);
}

/* Thin separator used instead of thick teal group rows */
.group-separator-line {
  height: 3px;
  background: var(--teal);
  border-radius: 999px;
  margin: 18px 0 12px;
}

@media (max-width: 520px) {
  .save-return-btn {
    min-width: 145px;
    padding: 9px 10px;
    font-size: 0.78rem;
  }
}


/* Student Resources */
.resource-subject-button {
  background: var(--student-dark);
  color: var(--white);
  border-radius: 16px;
  padding: 16px;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  text-align: left;
  gap: 12px;
}

.resource-subject-title {
  font-family: var(--font-heading);
  letter-spacing: 0.02em;
  font-size: 1.08rem;
}

.resource-count-pill {
  background: #e5e4e2;
  color: var(--student-dark);
  padding: 6px 10px;
  border-radius: 999px;
  font-family: var(--font-main);
  font-size: 0.82rem;
  font-weight: bold;
  white-space: nowrap;
}

.resource-section {
  background: var(--soft-panel);
  border-radius: 14px;
  padding: 14px;
  margin-bottom: 14px;
  text-align: left;
}

.resource-section h3 {
  margin-bottom: 12px;
}

.resource-list {
  display: grid;
  gap: 10px;
}

.task-resource-group {
  margin-top: 12px;
}

.task-resource-heading {
  background: var(--student-dark);
  color: var(--white);
  padding: 9px 11px;
  border-radius: 10px;
  font-weight: bold;
  margin-bottom: 8px;
}

.resource-card {
  background: #e5e4e2;
  border-radius: 14px;
  padding: 12px;
  border-left: 5px solid var(--student-dark);
}

.resource-card-main {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 10px;
}

.resource-type-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--student-dark);
  color: var(--white);
  border-radius: 999px;
  padding: 5px 9px;
  font-size: 0.72rem;
  font-weight: bold;
  min-width: 58px;
}

.resource-name {
  font-weight: bold;
  color: #222;
  line-height: 1.25;
}

.resource-player {
  width: 100%;
  margin: 6px 0 10px;
}

.resource-open-btn {
  min-height: 40px;
  padding: 9px 12px;
  font-size: 0.82rem;
  width: 100%;
}

@media (max-width: 420px) {
  .resource-subject-button {
    grid-template-columns: 1fr;
  }

  .resource-count-pill {
    justify-self: start;
  }

  .resource-card-main {
    align-items: flex-start;
    flex-direction: column;
  }
}

/* Student Resource Category Layout */
.resource-category-grid {
  display: grid;
  gap: 12px;
}

.resource-category-button {
  background: var(--student-dark);
  color: var(--white);
  border-radius: 16px;
  padding: 16px;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  text-align: left;
  gap: 12px;
}

.resource-category-button.is-empty {
  opacity: 0.55;
  cursor: not-allowed;
}

.resource-category-main {
  display: grid;
  gap: 4px;
}

.resource-category-title {
  font-family: var(--font-heading);
  letter-spacing: 0.02em;
  font-size: 1.08rem;
}

.resource-category-subtitle {
  font-family: var(--font-main);
  font-size: 0.82rem;
  opacity: 0.9;
  letter-spacing: 0;
}

.resource-subject-group h3 {
  border-bottom: 2px solid var(--student-dark);
  padding-bottom: 8px;
  margin-bottom: 10px;
}

.resource-task-list {
  display: grid;
  gap: 8px;
}

.student-resource-row {
  display: grid;
  grid-template-columns: 1fr 44px;
  gap: 10px;
  align-items: center;
  background: #e5e4e2;
  border-radius: 12px;
  padding: 10px;
  text-align: left;
  border-left: 5px solid var(--student-dark);
}

.student-resource-row-main {
  min-width: 0;
}

.student-resource-title {
  font-weight: bold;
  color: #1f3f60;
  line-height: 1.25;
  overflow-wrap: anywhere;
}

.student-resource-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 6px;
  color: #555;
  font-size: 0.82rem;
}

.small-badge {
  min-width: 46px;
  padding: 4px 7px;
  font-size: 0.68rem;
}

.resource-arrow-btn {
  width: 44px;
  min-width: 44px;
  height: 44px;
  min-height: 44px;
  padding: 0;
  border-radius: 50%;
  font-family: var(--font-main);
  font-size: 2rem;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.resource-arrow-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

@media (max-width: 420px) {
  .resource-category-button {
    grid-template-columns: 1fr;
  }

  .resource-count-pill {
    justify-self: start;
  }
}


/* Inline audio player for student resources */
.inline-audio-player {
  grid-column: 1 / -1;
  margin-top: 10px;
  width: 100%;
}

.resource-audio-control {
  width: 100%;
  display: block;
  margin-top: 8px;
}

.student-resource-meta .resource-type-badge {
  margin-right: 0;
}

/* Student resource module grouping and inline previews */
.resource-module-block {
  margin-top: 12px;
}

.resource-module-heading {
  background: rgba(35, 69, 105, 0.12);
  color: var(--student-dark);
  border-left: 5px solid var(--student-dark);
  border-radius: 10px;
  padding: 9px 11px;
  font-weight: bold;
  margin-bottom: 8px;
  text-align: left;
}

.inline-resource-preview {
  grid-column: 1 / -1;
  margin-top: 10px;
  width: 100%;
}

.resource-video-control {
  width: 100%;
  display: block;
  margin-top: 8px;
  border-radius: 10px;
  background: #111;
}

.resource-format-text {
    display: none;
}


/* Temporary student landing page: two large square buttons */
.student-main-button-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-top: 24px;
}

.student-main-button {
  aspect-ratio: 1 / 1;
  min-height: 150px;
  border-radius: 22px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  text-align: center;
  font-size: 1.25rem;
}

.student-main-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.18);
  border-radius: 50%;
  width: 54px;
  height: 54px;
  color: white;
  font-family: var(--font-main);
  font-weight: bold;
  font-size: 1.5rem;
}

@media (max-width: 420px) {
  .student-main-button-grid {
    grid-template-columns: 1fr;
  }

  .student-main-button {
    aspect-ratio: auto;
    min-height: 130px;
  }
}


/* Admin Attendance */
.attendance-date-row {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 14px;
  margin: 12px 0 20px;
}

.attendance-date-row input[type="date"] {
  margin: 0;
  text-align: center;
  font-family: var(--font-main);
}

.attendance-date-label {
  color: var(--teal-dark);
  font-family: var(--font-heading);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.attendance-filter-box {
  background: var(--soft-panel);
  border-radius: 14px;
  padding: 14px;
  margin-bottom: 16px;
}

.attendance-filter-box button {
  margin-top: 10px;
}

.attendance-group-heading {
  background: var(--teal-dark);
  color: var(--white);
  padding: 10px;
  border-radius: 10px;
  text-align: center;
  font-family: var(--font-heading);
  letter-spacing: 0.02em;
  margin: 16px 0 8px;
}

.attendance-register-row {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 14px 0;
  border-bottom: 2px solid #e5e4e2;
  text-align: left;
}

.attendance-student-name {
  color: var(--teal-dark);
  font-weight: bold;
  font-size: 1.05rem;
  overflow-wrap: anywhere;
}

.attendance-toggle {
  width: auto;
  min-width: 132px;
  min-height: 44px;
  border-radius: 10px;
  font-family: var(--font-main);
  font-weight: bold;
  letter-spacing: 0;
  box-shadow: none;
}

.attendance-toggle.is-present {
  background: #e8f5e9;
  color: forestgreen;
}

.attendance-toggle.is-absent {
  background: #ffebee;
  color: crimson;
}

.attendance-save-btn {
  margin-top: 18px;
}

.attendance-report-header,
.attendance-report-row {
  display: grid;
  grid-template-columns: 1fr 90px 72px;
  gap: 8px;
  align-items: center;
}

.attendance-report-header {
  background: #e5e4e2;
  border-bottom: 3px solid var(--teal-dark);
  color: var(--teal-dark);
  font-family: var(--font-heading);
  letter-spacing: 0.02em;
  padding: 10px 8px;
  text-align: left;
}

.attendance-report-row {
  background: #777;
  color: var(--white);
  border-radius: 8px;
  padding: 12px 10px;
  margin-top: 5px;
  text-align: left;
  cursor: pointer;
}

.attendance-report-row div:nth-child(2),
.attendance-report-row div:nth-child(3),
.attendance-report-header div:nth-child(2),
.attendance-report-header div:nth-child(3) {
  text-align: center;
}

.attendance-absent-dates {
  display: none;
  background: #696969;
  color: #f5f5f5;
  border-radius: 0 0 8px 8px;
  padding: 10px;
  font-size: 0.9rem;
  text-align: left;
}

.attendance-absent-dates.is-open {
  display: block;
}

.attendance-stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 16px;
}

.attendance-stat-card {
  background: var(--teal-dark);
  color: var(--white);
  border-radius: 14px;
  padding: 16px;
  text-align: center;
}

.attendance-stat-label {
  font-family: var(--font-heading);
  letter-spacing: 0.02em;
  margin-bottom: 8px;
}

.attendance-stat-number {
  font-size: 2.2rem;
  font-weight: bold;
  font-family: var(--font-main);
}

.attendance-breakdown-card {
  background: var(--soft-panel);
  border-radius: 14px;
  padding: 14px;
  margin-bottom: 16px;
  text-align: left;
}

.attendance-breakdown-row {
  margin-bottom: 12px;
}

.attendance-breakdown-label {
  display: flex;
  justify-content: space-between;
  font-weight: bold;
  color: #424242;
  margin-bottom: 5px;
}

.attendance-bar-track {
  height: 10px;
  background: #ddd;
  border-radius: 999px;
  overflow: hidden;
}

.attendance-bar-fill {
  height: 100%;
  background: limegreen;
  border-radius: 999px;
}

.attendance-perfect-list {
  background: #e8f5e9;
  border: 1px solid #c8e6c9;
  border-radius: 10px;
  padding: 10px;
  max-height: 260px;
  overflow-y: auto;
}

.attendance-perfect-row {
  color: #2e7d32;
  font-weight: bold;
  border-bottom: 1px dashed #a5d6a7;
  padding: 8px 4px;
}

@media (max-width: 520px) {
  .attendance-date-row {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .attendance-date-label {
    text-align: right;
  }

  .attendance-register-row {
    grid-template-columns: 1fr;
  }

  .attendance-toggle {
    width: 100%;
  }

  .attendance-report-header,
  .attendance-report-row {
    grid-template-columns: 1fr 72px 58px;
    font-size: 0.9rem;
  }

  .attendance-stat-grid {
    grid-template-columns: 1fr 1fr;
  }
}



/* =========================
   Final mobile cosmetic updates
========================= */

/* Staff Dashboard: four ordered cards with alternating teal shades */
.staff-dashboard-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.staff-dashboard-grid .home-card {
  min-height: 82px;
  justify-content: flex-start;
}

.staff-dashboard-grid .home-card:nth-child(odd) {
  background: var(--teal-dark);
}

.staff-dashboard-grid .home-card:nth-child(even) {
  background: #66b3b3;
}

/* Student home title */
#student-home-title {
  font-weight: bold;
  margin-bottom: 4px;
}

#student-welcome {
  margin: 0;
}

/* Attendance: compact, mobile-safe date rows */
.attendance-date-row {
  width: 100%;
  max-width: 100%;
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 4px 0 8px;
}

.attendance-date-row input[type="date"] {
  flex: 1 1 auto;
  min-width: 0;
  max-width: 100%;
  width: auto;
  margin: 0;
  padding: 11px 9px;
  text-align: center;
  font-family: var(--font-main);
}

.attendance-date-row-compact {
  margin-top: 0;
  margin-bottom: 5px;
}

.attendance-date-label {
  flex: 0 0 auto;
  color: var(--teal-dark);
  font-family: var(--font-heading);
  letter-spacing: 0.02em;
  white-space: nowrap;
  font-size: 0.92rem;
}

.attendance-filter-box {
  padding: 10px;
  margin-bottom: 10px;
}

.attendance-filter-box .attendance-date-row {
  margin: 0 0 5px;
}

.attendance-filter-box button {
  margin-top: 5px;
}

/* Mark Register feedback and top save */
.attendance-absence-feedback {
  margin: 0 0 8px;
  color: var(--teal-dark);
  font-weight: bold;
  text-align: left;
  font-size: 0.95rem;
}

#attendance-register-screen .nav-header {
  margin-bottom: 8px;
}

#attendance-register-screen .attendance-save-btn {
  margin-top: 0;
}

/* Replace attendance group labels with thin teal separators */
.attendance-group-heading {
  display: none;
}

.attendance-group-line {
  height: 2px;
  background: var(--teal-dark);
  border-radius: 999px;
  margin: 10px 0 6px;
}

/* Tighter attendance rows */
.attendance-register-row {
  padding: 9px 0;
  gap: 9px;
}

.attendance-report-row {
  margin-top: 2px;
  padding: 9px 8px;
}

.attendance-report-header {
  padding: 8px;
}

.attendance-absent-dates {
  padding: 8px;
}

/* Stats: label and percentage as two aligned columns */
.attendance-breakdown-label,
.attendance-breakdown-label-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  column-gap: 12px;
  align-items: center;
}

@media (max-width: 520px) {
  .attendance-date-row,
  .attendance-filter-box .attendance-date-row {
    flex-wrap: nowrap;
    gap: 6px;
  }

  .attendance-date-row input[type="date"] {
    font-size: 0.95rem;
    padding: 10px 7px;
  }

  .attendance-date-label {
    font-size: 0.78rem;
  }

  .attendance-register-row {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    flex-wrap: nowrap;
  }

  .attendance-student-name {
    min-width: 0;
    flex: 1 1 auto;
    font-size: 0.98rem;
  }

  .attendance-toggle {
    flex: 0 0 auto;
    width: auto;
    min-width: 112px;
    padding: 8px 9px;
    font-size: 0.78rem;
  }

  .attendance-report-header,
  .attendance-report-row {
    grid-template-columns: minmax(0, 1fr) 68px 54px;
    gap: 5px;
    font-size: 0.82rem;
  }

  .save-return-btn.attendance-save-btn {
    min-width: 134px;
    font-size: 0.74rem;
  }
}


/* Attendance dashboard: larger mobile-friendly menu buttons */
#attendance-dashboard .list-stack {
  gap: 22px;
}

#attendance-dashboard .list-btn {
  min-height: 72px;
  padding: 20px 22px;
  border-radius: 16px;
  font-size: 1.08rem;
  justify-content: flex-start;
  box-shadow: 0 8px 16px rgba(0,0,0,0.18);
}

@media (max-width: 520px) {
  #attendance-dashboard .list-stack {
    gap: 18px;
  }

  #attendance-dashboard .list-btn {
    min-height: 70px;
    padding: 18px 20px;
    font-size: 1rem;
  }
}


/* Student Progress task resource links */
.student-task-link-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-top: 7px;
}

.student-task-link-btn {
  width: auto;
  min-width: 34px;
  min-height: 30px;
  padding: 4px 8px;
  border-radius: 8px;
  font-family: var(--font-main);
  font-size: 0.78rem;
  font-weight: bold;
  letter-spacing: 0;
  line-height: 1;
  background: var(--student-dark);
  color: var(--white);
  box-shadow: 0 2px 5px rgba(0,0,0,0.18);
}

.student-task-inline-player {
  flex: 1 1 100%;
  width: 100%;
  margin-top: 6px;
}

.student-task-media-control {
  width: 100%;
  max-width: 260px;
  display: block;
}

@media (max-width: 520px) {
  .student-task-link-row {
    gap: 5px;
    margin-top: 6px;
  }

  .student-task-link-btn {
    min-width: 32px;
    min-height: 28px;
    padding: 4px 7px;
    font-size: 0.72rem;
  }

  .student-task-media-control {
    max-width: 220px;
  }
}


/* Manual refresh buttons */
.manual-refresh-btn {
  min-width: 92px;
  background: #0a8f8f;
}

.manual-refresh-btn:disabled {
  opacity: 0.65;
  cursor: wait;
}

.nav-header .manual-refresh-btn {
  margin-left: auto;
}

@media (max-width: 520px) {
  .nav-header {
    flex-wrap: wrap;
  }

  .nav-header h2 {
    flex: 1 1 100%;
    margin-bottom: 4px;
  }

  .nav-header .manual-refresh-btn {
    min-width: 104px;
    flex: 1 1 auto;
    order: 2;
    margin-left: 0;
  }

  .nav-header .small-btn:not(.manual-refresh-btn) {
    flex: 0 0 auto;
    order: 3;
  }
}



/* Final progress/module refinements */
.manual-refresh-btn {
  width: 48px;
  min-width: 48px;
  height: 44px;
  min-height: 44px;
  padding: 0;
  font-family: var(--font-main);
  font-size: 1.35rem;
  font-weight: bold;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.admin-theme .task-resource-heading,
.admin-theme .subject-heading-thin {
  background: var(--teal-dark);
  color: var(--white);
}

.group-separator-line {
  height: 8px;
  background: var(--teal-dark);
  border-radius: 999px;
  margin: 18px 0 14px;
}

.student-theme .group-separator-line {
  background: var(--student-dark);
}

@media (max-width: 520px) {
  .nav-header .manual-refresh-btn {
    flex: 0 0 48px;
    min-width: 48px;
    width: 48px;
  }

  .group-separator-line {
    height: 8px;
  }
}

/* Student Resources: subject drill-down screen */
.resource-subject-button-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 12px;
}

.resource-subject-drill-button {
  min-height: 96px;
  border-radius: 16px;
  padding: 14px 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: var(--student-dark);
  color: var(--white);
}

.admin-theme .resource-subject-drill-button {
  background: var(--teal-dark);
}

.resource-subject-button-title {
  font-family: var(--font-heading);
  letter-spacing: 0.02em;
  font-size: 1rem;
  line-height: 1.15;
  overflow-wrap: anywhere;
}

@media (max-width: 360px) {
  .resource-subject-button-grid {
    gap: 9px;
  }

  .resource-subject-drill-button {
    min-height: 86px;
    padding: 12px 8px;
  }

  .resource-subject-button-title {
    font-size: 0.9rem;
  }
}


/* Student Resources: module drill-down screen uses the same two-column button layout as subjects */
#student-resources-modules .resource-subject-button-grid {
  margin-top: 12px;
}

/* Shared Resources: admin view uses teal instead of student blue */
.admin-theme .resource-category-button,
.admin-theme .resource-subject-drill-button,
.admin-theme .resource-arrow-btn,
.admin-theme .resource-type-badge {
  background: var(--teal-dark);
}

.admin-theme .student-resource-row,
.admin-theme .resource-card {
  border-left-color: var(--teal-dark);
}

.admin-theme .student-resource-title {
  color: var(--teal-dark);
}

.admin-theme .resource-subject-group h3 {
  border-bottom-color: var(--teal-dark);
}

.admin-theme .resource-module-heading {
  background: rgba(0, 128, 128, 0.12);
  color: var(--teal-dark);
  border-left-color: var(--teal-dark);
}

.admin-theme .resource-count-pill {
  color: var(--teal-dark);
}

/* Splash Screen */
.splash-screen {
  position: fixed;
  inset: 0;
  background: #ffffff;
  z-index: 99999;

  display: flex;
  align-items: center;
  justify-content: center;

  transition: opacity 0.35s ease, visibility 0.35s ease;
}

.splash-screen.splash-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.splash-card {
  text-align: center;
  padding: 24px;
}

.splash-logo {
  width: min(60vw, 230px);
  max-width: 230px;
  aspect-ratio: 1920 / 1324;
  object-fit: contain;
  display: block;
  margin: 0 auto 16px auto;
}

.splash-loading-text {
  font-size: 0.9rem;
  color: dimgray;
  font-weight: 600;
  letter-spacing: 0.04em;
}


/* Hide module headings only in resource screens */
.resource-section .resource-module-heading,
.resource-subject-group .resource-module-heading {
  display: none;
}

.resource-section .resource-module-block,
.resource-subject-group .resource-module-block {
  margin-top: 6px;
}



/* Hide subject heading inside resource result pages */
.resource-subject-group > h3 {
  display: none;
}

.resource-subject-group {
  margin-top: 0;
}

.resource-subject-group .resource-module-block {
  margin-top: 0;
}


/* =========================
   Modern Mark Register makeover
   - Header and save button on one row
   - Sticky date / absentee summary
   - Student List heading
   - Cleaner student rows and group dividers
========================= */

#attendance-register-screen {
  background: #f7fafa;
}

#attendance-register-screen.screen {
  padding: 18px 14px;
}

.attendance-modern-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
  text-align: left;
}

.attendance-modern-header h2 {
  margin: 0;
  font-size: clamp(2rem, 9vw, 3rem);
  line-height: 1;
  letter-spacing: 0;
}

.attendance-modern-header .attendance-save-btn {
  flex: 0 0 auto;
  width: auto;
  min-width: 150px;
  min-height: 46px;
  margin: 0;
  padding: 10px 14px;
  border-radius: 14px;
  font-size: 0.9rem;
  box-shadow: 0 8px 16px rgba(0, 128, 128, 0.22);
}

.attendance-register-sticky {
  position: sticky;
  top: 0;
  z-index: 50;
  padding: 8px 0 12px;
  margin-bottom: 4px;
  background: #f7fafa;
}



.attendance-summary-card {
  display: grid;
  grid-template-columns: 1fr 1px 1fr;
  align-items: stretch;
  gap: 12px;
  background: #ffffff;
  border: 1px solid rgba(0, 128, 128, 0.12);
  border-radius: 18px;
  padding: 14px;
  box-shadow: 0 10px 22px rgba(0, 0, 0, 0.08);
}

.attendance-summary-item {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  text-align: left;
}

.attendance-summary-icon {
  flex: 0 0 42px;
  width: 42px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(0, 128, 128, 0.10);
  color: var(--teal-dark);
  font-size: 1.25rem;
}

.attendance-summary-text {
  min-width: 0;
  display: grid;
  gap: 2px;
}

.attendance-summary-label {
  color: #6b6b6b;
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.attendance-summary-card input[type="date"] {
  width: 100%;
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--teal-dark);
  font-size: 1.02rem;
  font-weight: 800;
  text-align: left;
  box-shadow: none;
}

.attendance-summary-divider {
  width: 1px;
  background: rgba(0, 0, 0, 0.12);
}

.attendance-summary-card .attendance-absence-feedback {
  margin: 0;
  color: var(--teal-dark);
  font-size: 1.02rem;
  line-height: 1.1;
  text-align: left;
}

.attendance-summary-subtext {
  color: #666;
  font-size: 0.82rem;
  line-height: 1.1;
}

.attendance-list-heading {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 10px -14px 14px;
  padding: 11px 16px;
  background: linear-gradient(90deg, rgba(0, 128, 128, 0.16), rgba(0, 128, 128, 0.04));
  color: var(--teal-dark);
  font-weight: 800;
  font-size: 1.08rem;
  text-align: left;
}

.attendance-list-icon {
  flex: 0 0 34px;
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(0, 128, 128, 0.13);
  font-size: 1rem;
}

#attendance-register-screen .attendance-group-line {
  height: 7px;
  background: linear-gradient(90deg, rgba(0, 128, 128, 0.95), rgba(0, 128, 128, 0.50));
  border-radius: 999px;
  margin: 16px 3px 12px;
}

#attendance-register-screen .attendance-group-line:first-of-type {
  margin-top: 4px;
}

#attendance-register-screen .attendance-register-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 13px 14px;
  margin-bottom: 10px;
  border: 1px solid rgba(0, 128, 128, 0.08);
  border-bottom: 1px solid rgba(0, 128, 128, 0.08);
  border-radius: 17px;
  background: #ffffff;
  box-shadow: 0 5px 14px rgba(0, 0, 0, 0.06);
}

.attendance-student-main {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.attendance-student-avatar {
  flex: 0 0 44px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 128, 128, 0.10);
  color: var(--teal-dark);
  font-weight: 900;
  letter-spacing: 0.02em;
}

#attendance-register-screen .attendance-student-name {
  color: #14313a;
  font-size: 1.02rem;
  font-weight: 800;
  line-height: 1.15;
}

#attendance-register-screen .attendance-toggle {
  min-width: 122px;
  min-height: 42px;
  padding: 8px 12px;
  border-radius: 15px;
  font-size: 0.84rem;
  letter-spacing: 0.03em;
  box-shadow: none;
}

#attendance-register-screen .attendance-toggle.is-present {
  background: #eaf8ed;
  color: #16821f;
}

#attendance-register-screen .attendance-toggle.is-absent {
  background: #fff0f1;
  color: #c01832;
}

@media (max-width: 520px) {
  #attendance-register-screen.screen {
    padding: 16px 12px;
  }

  .attendance-modern-header {
    gap: 8px;
  }

  .attendance-modern-header h2 {
    font-size: clamp(1.75rem, 8vw, 2.4rem);
  }

  .attendance-modern-header .attendance-save-btn {
    min-width: 128px;
    min-height: 42px;
    padding: 8px 10px;
    font-size: 0.76rem;
    border-radius: 13px;
  }

  .attendance-register-sticky {
    top: 0;
    padding-top: 6px;
  }

  .attendance-summary-card {
    gap: 8px;
    padding: 12px 10px;
    border-radius: 16px;
  }

  .attendance-summary-item {
    gap: 7px;
  }

  .attendance-summary-icon {
    flex-basis: 34px;
    width: 34px;
    height: 34px;
    font-size: 1rem;
  }

  .attendance-summary-card input[type="date"],
  .attendance-summary-card .attendance-absence-feedback {
    font-size: 0.86rem;
  }

  .attendance-summary-label {
    font-size: 0.62rem;
  }

  .attendance-summary-subtext {
    font-size: 0.72rem;
  }

  .attendance-list-heading {
    margin-left: -12px;
    margin-right: -12px;
  }

  #attendance-register-screen .attendance-register-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    padding: 12px 10px;
    gap: 8px;
  }

  .attendance-student-main {
    gap: 8px;
  }

  .attendance-student-avatar {
    flex-basis: 36px;
    width: 36px;
    height: 36px;
    font-size: 0.82rem;
  }

  #attendance-register-screen .attendance-student-name {
    font-size: 0.94rem;
  }

  #attendance-register-screen .attendance-toggle {
    min-width: 105px;
    padding: 7px 8px;
    font-size: 0.72rem;
  }
}

@media (max-width: 360px) {
  .attendance-modern-header {
    flex-wrap: wrap;
  }

  .attendance-modern-header .attendance-save-btn {
    width: 100%;
  }

  .attendance-summary-card {
    grid-template-columns: 1fr;
  }

  .attendance-summary-divider {
    width: 100%;
    height: 1px;
  }
}

/* PDF.js in-app viewer */
body.pdf-viewer-open {
  padding: 0;
}

body.pdf-viewer-open .app-shell {
  max-width: none;
  min-height: 100vh;
  align-items: stretch;
  justify-content: stretch;
}

#pdf-viewer-screen.screen {
  padding: 0;
}

body.pdf-viewer-open #pdf-viewer-screen.screen {
  min-height: 100vh;
  border-radius: 0;
}

.pdf-viewer-header {
  margin: 0;
  padding: 10px 12px;
  border-bottom: 2px solid rgba(0, 0, 0, 0.18);
}

.pdf-viewer-header h2 {
  margin: 0;
  font-size: 1rem;
  line-height: 1.2;
}

.pdf-viewer-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
}

.pdf-viewer-actions .small-btn {
  width: auto;
  min-width: 64px;
}

.pdf-direct-btn {
  opacity: 0.92;
}

.pdf-viewer-frame {
  display: block;
  width: 100%;
  height: calc(100vh - 62px);
  border: 0;
  background: #f5f5f5;
}

@media (max-width: 520px) {
  .pdf-viewer-header {
    flex-wrap: nowrap;
    gap: 8px;
    padding: 8px;
  }

  .pdf-viewer-header h2 {
    flex: 1 1 auto;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .pdf-viewer-actions {
    gap: 6px;
  }

  .pdf-viewer-actions .small-btn {
    min-width: 56px;
    padding: 8px 9px;
    font-size: 0.78rem;
  }

  .pdf-viewer-frame {
    height: calc(100vh - 54px);
  }
}


/* =========================
   Manage Students - modern mobile UI
========================= */

.student-admin-screen {
  background: #f7fafa;
  padding: 18px 14px;
}

.student-admin-modern-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
  text-align: left;
}

.student-admin-modern-header h2 {
  margin: 0;
  font-size: clamp(2rem, 8vw, 2.8rem);
  line-height: 1;
  letter-spacing: 0;
}

.student-admin-mode-toggle {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  background: #ffffff;
  border: 1px solid rgba(0, 128, 128, 0.12);
  border-radius: 18px;
  padding: 8px;
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.07);
  margin-bottom: 14px;
}

.student-admin-mode-btn {
  min-height: 46px;
  border-radius: 14px;
  box-shadow: none;
  background: #e5e4e2;
  color: #305050;
}

.student-admin-mode-btn.is-active {
  background: var(--teal-dark);
  color: var(--white);
}

.student-admin-card,
.student-admin-result-card {
  background: #ffffff;
  border: 1px solid rgba(0, 128, 128, 0.12);
  border-radius: 18px;
  padding: 15px;
  margin-bottom: 14px;
  box-shadow: 0 10px 22px rgba(0, 0, 0, 0.08);
  text-align: left;
}

.student-admin-card-title {
  color: var(--teal-dark);
  font-weight: 900;
  font-size: 1.08rem;
  margin-bottom: 12px;
  text-align: left;
}

.student-admin-label {
  display: block;
  color: #4f6666;
  font-size: 0.76rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 10px;
  margin-bottom: 5px;
}

.student-admin-help,
.student-admin-feedback {
  color: #666;
  font-size: 0.86rem;
  line-height: 1.35;
  margin: 4px 0 0;
  text-align: left;
}

.student-admin-feedback {
  color: var(--teal-dark);
  font-weight: 800;
  min-height: 20px;
  margin: 10px 0;
}

.student-admin-radio-row,
.student-subject-check-row,
.student-module-check-row {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 10px;
  align-items: center;
  text-align: left;
  color: #14313a;
  font-weight: 750;
  margin: 8px 0;
}

.student-admin-radio-row input,
.student-subject-check-row input,
.student-module-check-row input {
  width: 20px;
  height: 20px;
  margin: 0;
  accent-color: var(--teal-dark);
}

.student-assignment-options {
  margin-top: 12px;
}

.student-assignment-subject-card {
  background: #f7fafa;
  border: 1px solid rgba(0, 128, 128, 0.12);
  border-left: 6px solid var(--teal-dark);
  border-radius: 16px;
  padding: 12px;
  margin-bottom: 10px;
}

.student-subject-check-row {
  font-size: 1rem;
  margin-bottom: 10px;
}

.student-module-check-list {
  display: grid;
  gap: 7px;
  margin-left: 8px;
}

.student-module-check-row {
  grid-template-columns: auto 1fr auto;
  background: #ffffff;
  border-radius: 12px;
  padding: 9px;
  margin: 0;
  font-size: 0.94rem;
  border: 1px solid rgba(0, 128, 128, 0.08);
}

.student-module-check-row small {
  color: #667;
  font-weight: 800;
  white-space: nowrap;
}

.student-admin-action-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 9px;
  margin: 12px 0 14px;
}

.student-admin-action-grid.two-col,
.student-admin-action-grid.three-col {
  grid-template-columns: 1fr 1fr;
}

.student-admin-action-grid.three-col button:last-child {
  grid-column: 1 / -1;
}

.student-link-box {
  background: #e5e4e2;
  color: #14313a;
  border-radius: 14px;
  padding: 12px;
  font-size: 0.9rem;
  font-weight: 800;
  overflow-wrap: anywhere;
  border-left: 5px solid var(--teal-dark);
}

.student-message-preview {
  margin-top: 12px;
  background: #f7fafa;
  border-radius: 14px;
  padding: 10px;
  border: 1px solid rgba(0, 128, 128, 0.10);
}

.student-message-preview summary {
  color: var(--teal-dark);
  font-weight: 900;
  cursor: pointer;
}

.student-message-preview pre {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  font-family: var(--font-main);
  font-size: 0.88rem;
  line-height: 1.4;
  color: #333;
  margin: 10px 0 0;
}

.student-search-results {
  display: grid;
  gap: 10px;
  margin-bottom: 14px;
}

.student-search-card {
  width: 100%;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  background: #ffffff;
  color: #14313a;
  text-align: left;
  border: 1px solid rgba(0, 128, 128, 0.12);
  border-radius: 17px;
  padding: 12px;
  box-shadow: 0 5px 14px rgba(0, 0, 0, 0.06);
}

.student-search-main {
  display: grid;
  min-width: 0;
  gap: 3px;
}

.student-search-main strong {
  overflow-wrap: anywhere;
}

.student-search-main small {
  color: #666;
  font-weight: 700;
}

.student-status-badge {
  border-radius: 999px;
  padding: 6px 9px;
  font-size: 0.72rem;
  font-weight: 900;
  white-space: nowrap;
}

.student-status-badge.is-active {
  background: #eaf8ed;
  color: #16821f;
}

.student-status-badge.is-inactive {
  background: #fff0f1;
  color: #c01832;
}

.selected-student-heading {
  display: flex;
  align-items: center;
  gap: 12px;
  background: #f7fafa;
  border-radius: 15px;
  padding: 10px;
  margin-bottom: 12px;
}

.selected-student-heading div {
  display: grid;
  gap: 3px;
}

.selected-student-heading small {
  color: #666;
  font-weight: 700;
}

.student-active-toggle {
  margin-top: 10px;
  box-shadow: none;
}

.student-active-toggle.is-active {
  background: #eaf8ed;
  color: #16821f;
}

.student-active-toggle.is-inactive {
  background: #fff0f1;
  color: #c01832;
}

@media (max-width: 520px) {
  .student-admin-screen {
    padding: 16px 12px;
  }

  .student-admin-modern-header h2 {
    font-size: clamp(1.75rem, 8vw, 2.35rem);
  }

  .student-admin-modern-header .small-btn {
    min-width: 82px;
  }

  .student-admin-card,
  .student-admin-result-card {
    padding: 13px;
    border-radius: 17px;
  }

  .student-admin-action-grid.two-col,
  .student-admin-action-grid.three-col {
    grid-template-columns: 1fr;
  }

  .student-admin-action-grid.three-col button:last-child {
    grid-column: auto;
  }

  .student-search-card {
    grid-template-columns: auto minmax(0, 1fr);
  }

  .student-status-badge {
    grid-column: 2;
    justify-self: start;
  }

  .student-module-check-row {
    grid-template-columns: auto 1fr;
  }

  .student-module-check-row small {
    grid-column: 2;
  }
}

/* Manage Students: temporary disabled manual assignment + editable message */
.student-admin-radio-row.is-disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.student-admin-radio-row.is-disabled input,
.student-admin-radio-row.is-disabled span {
  cursor: not-allowed;
}

.student-admin-coming-soon {
  display: inline-block;
  margin-left: 6px;
  padding: 3px 7px;
  border-radius: 999px;
  background: #e5e4e2;
  color: #555;
  font-size: 0.68rem;
  font-weight: 900;
  vertical-align: middle;
}

.student-message-textarea {
  width: 100%;
  min-height: 230px;
  resize: vertical;
  margin: 8px 0 6px;
  padding: 12px;
  border: 1px solid rgba(0, 128, 128, 0.25);
  border-radius: 14px;
  background: #f7fafa;
  color: #14313a;
  font-family: var(--font-main);
  font-size: 0.92rem;
  line-height: 1.45;
  white-space: pre-wrap;
}

.student-message-textarea:focus {
  outline: 2px solid rgba(0, 128, 128, 0.22);
  border-color: var(--teal-dark);
}

/* Manage Students: scrollable full student list and prefilled edit fields */
.student-admin-action-grid.compact-actions {
  margin-top: 8px;
  margin-bottom: 4px;
}

.student-list-card {
  padding-bottom: 10px;
}

.managed-student-list {
  display: grid;
  gap: 9px;
  max-height: min(58vh, 520px);
  overflow-y: auto;
  padding: 2px 2px 8px;
  -webkit-overflow-scrolling: touch;
}

.managed-student-group-heading {
  position: sticky;
  top: 0;
  z-index: 2;
  background: linear-gradient(90deg, rgba(0, 128, 128, 0.16), rgba(0, 128, 128, 0.04));
  color: var(--teal-dark);
  border-left: 6px solid var(--teal-dark);
  border-radius: 12px;
  padding: 9px 12px;
  margin: 8px 0 2px;
  font-weight: 900;
  text-align: left;
}

.managed-student-list .student-search-card {
  margin: 0;
}

.student-prefilled-input {
  color: #777;
  background: #f2f3f3;
  border-color: rgba(0, 128, 128, 0.22);
  font-weight: 650;
}

.student-prefilled-input:focus {
  color: #14313a;
  background: #ffffff;
  outline: 2px solid rgba(0, 128, 128, 0.18);
  border-color: var(--teal-dark);
}

@media (max-width: 520px) {
  .managed-student-list {
    max-height: 54vh;
  }

  .managed-student-group-heading {
    padding: 8px 10px;
    margin-top: 7px;
  }
}