* {
  box-sizing: border-box;
}

:root {
  --brand: #00D1C7;
  --bg: #07101f;
  --panel: #0b1220;
  --panel-2: #020617;
  --text: #f8fafc;
  --muted: #94a3b8;
  --border: rgba(148, 163, 184, 0.24);
  --danger: #ef4444;
  --danger-dark: #991b1b;
  --grey: #475569;
  --ok: #22c55e;
  --warning: #f59e0b;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
}

button,
input {
  font-family: inherit;
}

.mobile-page {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background: radial-gradient(circle at top, rgba(0, 209, 199, 0.09), transparent 42%), var(--bg);
}

.mobile-header {
  padding: max(14px, env(safe-area-inset-top)) 14px 12px;
  background: rgba(2, 6, 23, 0.96);
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  gap: 12px;
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand {
  color: var(--brand);
  font-weight: 800;
  font-size: 18px;
}

.course {
  margin-top: 4px;
  color: var(--text);
  font-weight: 700;
  font-size: 13px;
  line-height: 1.25;
}

.header-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
  flex-shrink: 0;
}

.status-block {
  display: flex;
  align-items: center;
  gap: 7px;
  color: var(--muted);
  font-size: 12px;
  white-space: nowrap;
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
}

.status-idle {
  background: var(--warning);
}

.status-connected {
  background: var(--ok);
}

.status-error {
  background: var(--danger);
}

.logout-button,
.history-controls button,
.transcript-header button,
.email-row button {
  border: 1px solid rgba(0, 209, 199, 0.5);
  background: transparent;
  color: var(--brand);
  border-radius: 999px;
  font-weight: 800;
  cursor: pointer;
}

.logout-button {
  height: 30px;
  padding: 0 12px;
  border-color: rgba(239, 68, 68, 0.6);
  color: #fecaca;
  font-size: 12px;
}

.mobile-main {
  flex: 1;
  padding: 12px;
  display: grid;
  grid-template-rows: minmax(300px, 48dvh) auto minmax(260px, 1fr);
  gap: 12px;
  min-height: 0;
}

.blackboard-card,
.controls-card,
.transcript-card {
  border: 1px solid var(--border);
  background: rgba(11, 18, 32, 0.94);
  border-radius: 18px;
  overflow: hidden;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.24);
}

.card-header {
  min-height: 58px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  background: rgba(2, 6, 23, 0.45);
}

.card-header h1,
.card-header h2 {
  margin: 0;
  color: var(--text);
  font-size: 18px;
}

.card-header p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.history-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 12px;
}

.history-controls button {
  width: 34px;
  height: 30px;
}

.history-controls button:disabled {
  opacity: 0.45;
}

.blackboard-card {
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.blackboard-content {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  line-height: 1.5;
  color: #e5edf7;
  font-size: 15px;
  min-height: 0;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.blackboard-content h1,
.blackboard-content h2,
.blackboard-content h3 {
  color: var(--brand);
  line-height: 1.25;
  margin: 16px 0 8px;
}

.blackboard-content h1 {
  font-size: 22px;
  margin-top: 0;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.blackboard-content h2 {
  font-size: 18px;
}

.blackboard-content h3 {
  font-size: 16px;
}

.blackboard-content p {
  margin: 8px 0;
}

.blackboard-content ul,
.blackboard-content ol {
  margin: 8px 0 12px;
  padding-left: 22px;
}

.blackboard-content li {
  margin-bottom: 7px;
}

.blackboard-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0 16px;
  font-size: 13px;
}

.blackboard-content th,
.blackboard-content td {
  border: 1px solid rgba(255, 255, 255, 0.18);
  padding: 8px;
  vertical-align: top;
}

.blackboard-content th {
  color: var(--brand);
  background: rgba(255, 255, 255, 0.04);
}

.blackboard-content .bb-table-wrap {
  width: 100%;
  overflow-x: auto;
}

.controls-card {
  padding: 16px 12px;
  display: grid;
  justify-items: center;
  gap: 12px;
}

.mic-button {
    width: 70px;
    height: 70px;

    border-radius: 50%;
    border: none;

    font-size: 2rem;
    color: white;

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

    margin: 20px auto;

    transition: all 0.3s ease;
}

/* Mobile mic pictogram states:
   muted = mic off
   listening = mic on
*/
#micToggleBtn::before {
  content: "";
  width: 28px;
  height: 28px;
  display: inline-block;
  flex-shrink: 0;
  background-color: currentColor;

  /* Mic OFF icon */
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='black' d='M19 11h-2q0 .85-.275 1.6l1.475 1.475Q19 12.75 19 11ZM4.275 3L21 19.725L19.725 21L3 4.275L4.275 3ZM12 14q.575 0 1.075-.213L9 9.712V11q0 1.25.875 2.125T12 14Zm3-3V5q0-1.25-.875-2.125T12 2Q10.75 2 9.875 2.875T9 5v.175l6 6ZM11 21v-3.075q-2.6-.35-4.3-2.325Q5 13.625 5 11h2q0 2.075 1.463 3.538Q9.925 16 12 16q.85 0 1.613-.263l1.5 1.5q-.925.45-2.113.688V21h-2Z'/%3E%3C/svg%3E") center / contain no-repeat;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='black' d='M19 11h-2q0 .85-.275 1.6l1.475 1.475Q19 12.75 19 11ZM4.275 3L21 19.725L19.725 21L3 4.275L4.275 3ZM12 14q.575 0 1.075-.213L9 9.712V11q0 1.25.875 2.125T12 14Zm3-3V5q0-1.25-.875-2.125T12 2Q10.75 2 9.875 2.875T9 5v.175l6 6ZM11 21v-3.075q-2.6-.35-4.3-2.325Q5 13.625 5 11h2q0 2.075 1.463 3.538Q9.925 16 12 16q.85 0 1.613-.263l1.5 1.5q-.925.45-2.113.688V21h-2Z'/%3E%3C/svg%3E") center / contain no-repeat;
}

#micToggleBtn.mic-listening-active::before {
  /* Mic ON icon */
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='black' d='M12 14q-1.25 0-2.125-.875T9 11V5q0-1.25.875-2.125T12 2q1.25 0 2.125.875T15 5v6q0 1.25-.875 2.125T12 14Zm-1 7v-3.075q-2.6-.35-4.3-2.325Q5 13.625 5 11h2q0 2.075 1.463 3.538Q9.925 16 12 16t3.538-1.462Q17 13.075 17 11h2q0 2.625-1.7 4.6q-1.7 1.975-4.3 2.325V21h-2Z'/%3E%3C/svg%3E") center / contain no-repeat;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='black' d='M12 14q-1.25 0-2.125-.875T9 11V5q0-1.25.875-2.125T12 2q1.25 0 2.125.875T15 5v6q0 1.25-.875 2.125T12 14Zm-1 7v-3.075q-2.6-.35-4.3-2.325Q5 13.625 5 11h2q0 2.075 1.463 3.538Q9.925 16 12 16t3.538-1.462Q17 13.075 17 11h2q0 2.625-1.7 4.6q-1.7 1.975-4.3 2.325V21h-2Z'/%3E%3C/svg%3E") center / contain no-repeat;
}


.mic-off {
    background: #888888;
}

.mic-on {
    background: #16a34a;
}

.mic-status {
    text-align: center;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 20px;
}


.mic-on {
  background: linear-gradient(
      180deg,
      #22c55e,
      #15803d
  );
}

.mic-off {
  background: linear-gradient(180deg, #64748b, var(--grey));
}


.email-row {
  width: 80vw;
  max-width: 680px;
  display: flex;
  gap: 8px;
}

.email-row input {
  min-width: 0;
  flex: 1;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #020617;
  color: var(--text);
  padding: 0 12px;
  outline: none;
}

.email-row input:focus {
  border-color: var(--brand);
}

.email-row button {
  padding: 0 14px;
  height: 42px;
}

.transcript-card {
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.dialogue-history {
  flex: 1;
  overflow-y: auto;
  padding: 12px;
}

.dialogue-message {
  margin-bottom: 12px;
  padding: 11px 12px;
  border: 1px solid var(--border);
  border-radius: 15px;
}

.student-message {
  background: rgba(0, 209, 199, 0.08);
  margin-left: 24px;
}

.eva-message {
  background: rgba(15, 23, 42, 0.78);
  margin-right: 24px;
}

.system-message {
  background: rgba(245, 158, 11, 0.08);
  border-color: rgba(245, 158, 11, 0.36);
}

.message-meta {
  color: var(--brand);
  font-size: 12px;
  font-weight: 800;
  margin-bottom: 6px;
}

.message-time {
  color: var(--muted);
  font-weight: 400;
  margin-left: 6px;
}

.message-text {
  white-space: pre-wrap;
  font-size: 16px;
  line-height: 1.42;
}


#realtimeAudio {
  display: none;
}

@media (min-width: 800px) {
  .mobile-main {
    max-width: 860px;
    width: 100%;
    margin: 0 auto;
  }
}


/* v17 mobile-first layout: compact header, maximum Blackboard, mic above fold */
html, body {
  height: 100%;
  overflow-x: hidden;
}

.mobile-page {
  min-height: 100dvh;
}

.mobile-header.compact-header {
  min-height: 48px;
  padding: max(6px, env(safe-area-inset-top)) 10px 6px;
  align-items: center;
  gap: 8px;
}

.header-left-compact {
  min-width: 0;
}

.brand {
  font-size: 13px;
  line-height: 1.1;
}

.course {
  margin-top: 2px;
  font-size: 10.5px;
  line-height: 1.15;
  color: #cbd5e1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 64vw;
}

.header-right {
  gap: 4px;
}

.status-block {
  font-size: 10.5px;
  gap: 5px;
}

.status-dot {
  width: 8px;
  height: 8px;
}

.logout-button {
  height: 24px;
  padding: 0 9px;
  font-size: 10.5px;
}

.mobile-main {
  padding: 8px 10px 14px;
  gap: 8px;
  grid-template-rows: minmax(0, calc(100dvh - 48px - 112px - 32px)) auto auto auto auto;
  align-items: stretch;
}

.blackboard-card {
  min-height: 0;
}

.blackboard-card-header {
  min-height: 42px;
  padding: 7px 10px;
}

.card-header h1,
.card-header h2 {
  font-size: 14px;
}

.card-header p {
  margin-top: 2px;
  font-size: 10.5px;
}

.history-controls {
  gap: 5px;
  font-size: 10.5px;
}

.history-controls button {
  width: 28px;
  height: 25px;
  font-size: 13px;
}

.blackboard-content {
  padding: 12px 13px;
  font-size: 14px;
  line-height: 1.45;
}

.blackboard-content h1 {
  font-size: 18px;
}

.blackboard-content h2 {
  font-size: 15.5px;
}

.blackboard-content h3 {
  font-size: 14px;
}

.controls-card {
  padding: 9px 8px 10px;
  border-radius: 16px;
  box-shadow: none;
}



.below-fold-card {
  border: 1px solid var(--border);
  background: rgba(11, 18, 32, 0.94);
  border-radius: 18px;
  padding: 12px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.20);
}

.below-fold-title {
  color: var(--brand);
  font-weight: 800;
  font-size: 13px;
  margin-bottom: 8px;
}

.email-row {
  width: 100%;
  max-width: none;
}

.email-row button {
  min-width: 118px;
  font-size: 12px;
}

.transcript-card {
  min-height: 360px;
}

.mobile-footer {
  color: var(--muted);
  text-align: center;
  font-size: 11px;
  padding: 10px 0 max(14px, env(safe-area-inset-bottom));
}

@media (min-width: 800px) {
  .mobile-main {
    grid-template-rows: minmax(0, 620px) auto auto auto auto;
  }
}


/* v18: first viewport contains only compact header, Blackboard, and mic button.
   Session tools + transcript begin below the fold. */
.mobile-main {
  display: block;
  padding: 0 10px 14px;
  max-width: 860px;
  width: 100%;
  margin: 0 auto;
}


@media (min-width: 800px) {
  .mobile-main {
    max-width: 860px;
  }

  .primary-screen {
    height: calc(100dvh - 48px);
  }
}


.primary-screen {
  height: calc(100dvh - 48px);
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  gap: 8px;
  padding: 8px 0 12px;
  overflow: hidden;
}

.primary-screen .blackboard-card {
  min-height: 0;
  height: 100%;
  overflow: hidden;
}

.primary-screen .controls-card {
  flex-shrink: 0;
  margin: 0;
}

.below-fold-card {
  margin-top: 18px;
}

.transcript-card {
  margin-top: 12px;
}

.mobile-footer {
  margin-top: 12px;
}