.observer-builder {
    padding: 34px 0 42px;
    background: var(--surface-soft);
}

.observer-builder-inner {
    display: grid;
    gap: 22px;
}

.observer-builder-heading {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 290px;
    align-items: end;
    gap: 32px;
}

.observer-builder-heading h1 {
    max-width: 760px;
    margin: 5px 0 8px;
    font-size: clamp(2rem, 4vw, 3.35rem);
    line-height: 1.02;
    letter-spacing: 0;
}

.observer-builder-heading > div > p:last-child {
    max-width: 720px;
    margin: 0;
    color: var(--muted);
    font-size: 1.03rem;
}

.observer-experimental-label {
    display: inline-flex;
    align-items: center;
    min-height: 27px;
    padding: 4px 8px;
    border: 1px solid color-mix(in srgb, var(--amber) 52%, var(--line));
    border-radius: 5px;
    color: color-mix(in srgb, var(--amber) 68%, var(--ink));
    background: color-mix(in srgb, var(--amber) 10%, var(--surface));
    font-size: 0.73rem;
    font-weight: 900;
    letter-spacing: 0;
    text-transform: uppercase;
}

.observer-builder-note {
    display: grid;
    gap: 7px;
    padding: 15px 16px;
    border-left: 3px solid var(--teal);
    color: var(--muted);
    background: color-mix(in srgb, var(--surface) 82%, var(--teal-soft));
}

.observer-builder-note strong {
    color: var(--ink);
    font-size: 0.96rem;
}

.observer-builder-note span {
    position: relative;
    padding-left: 15px;
    font-size: 0.82rem;
}

.observer-builder-note span::before {
    position: absolute;
    top: 0.48em;
    left: 0;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--teal);
    content: "";
}

.observer-builder-error {
    padding: 11px 13px;
    border: 1px solid color-mix(in srgb, var(--coral) 48%, var(--line));
    border-radius: 6px;
    color: color-mix(in srgb, var(--coral) 70%, var(--ink));
    background: color-mix(in srgb, var(--coral) 9%, var(--surface));
    font-weight: 800;
}

.observer-builder-form {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 64px minmax(0, 1fr);
    gap: 18px;
    padding: 20px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--surface);
    box-shadow: 0 16px 42px color-mix(in srgb, var(--ink) 7%, transparent);
}

.observer-picker-column {
    display: grid;
    align-content: start;
    gap: 8px;
    min-width: 0;
}

.observer-picker-column > label,
.observer-lesson-options > label,
.observer-duration-row > label {
    color: var(--ink);
    font-size: 0.78rem;
    font-weight: 900;
    text-transform: uppercase;
}

.observer-picker-column select,
.observer-duration-row select,
.observer-lesson-options textarea {
    width: 100%;
    border: 1px solid color-mix(in srgb, var(--teal) 35%, var(--line));
    border-radius: 6px;
    color: var(--ink);
    background: var(--surface-soft);
    font: inherit;
    transition: border-color 140ms ease, box-shadow 140ms ease, background 140ms ease;
}

.observer-picker-column select,
.observer-duration-row select {
    min-height: 46px;
    padding: 0 40px 0 12px;
}

.observer-lesson-options textarea {
    min-height: 82px;
    padding: 11px 12px;
    resize: vertical;
}

.observer-picker-column select:focus,
.observer-duration-row select:focus,
.observer-lesson-options textarea:focus {
    outline: none;
    border-color: var(--teal);
    background: var(--surface);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--teal) 17%, transparent);
}

.observer-search-select {
    position: relative;
    min-width: 0;
}

.observer-search-select.is-enhanced > select {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0 0 0 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

.observer-search-select.is-open {
    z-index: 80;
}

.observer-combobox,
.observer-combobox-input {
    min-width: 0;
}

.observer-combobox[hidden],
.observer-combobox-popover[hidden],
.observer-combobox-empty[hidden] {
    display: none !important;
}

.observer-combobox {
    position: relative;
}

.observer-combobox-input {
    display: grid;
    grid-template-columns: 34px minmax(0, 1fr) 40px;
    align-items: center;
    min-height: 46px;
    overflow: hidden;
    border: 1px solid color-mix(in srgb, var(--teal) 35%, var(--line));
    border-radius: 6px;
    background: var(--surface-soft);
    transition: border-color 140ms ease, box-shadow 140ms ease, background 140ms ease;
}

.observer-combobox-input:focus-within {
    border-color: var(--teal);
    background: var(--surface);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--teal) 17%, transparent);
}

.observer-combobox-input > img {
    justify-self: end;
    opacity: 0.7;
}

.observer-combobox-input input {
    width: 100%;
    min-width: 0;
    height: 44px;
    padding: 0 8px;
    border: 0;
    outline: 0;
    color: var(--ink);
    background: transparent;
    font: inherit;
    font-weight: 760;
}

.observer-combobox-input input::placeholder {
    color: var(--muted);
    font-weight: 600;
}

.observer-combobox-input button {
    display: grid;
    place-items: center;
    align-self: stretch;
    width: 40px;
    padding: 0;
    border: 0;
    border-left: 1px solid var(--line);
    color: var(--ink);
    background: transparent;
    cursor: pointer;
    transition: color 140ms ease, background 140ms ease;
}

.observer-combobox-input button:hover,
.observer-combobox-input button:focus-visible {
    outline: 0;
    color: var(--teal);
    background: color-mix(in srgb, var(--teal) 11%, transparent);
}

.observer-combobox-input button img {
    transition: transform 150ms ease;
}

.observer-combobox-input button.is-open img {
    transform: rotate(180deg);
}

.observer-combobox-popover {
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    left: 0;
    z-index: 90;
    display: grid;
    overflow: hidden;
    border: 1px solid color-mix(in srgb, var(--teal) 38%, var(--line));
    border-radius: 7px;
    background: var(--surface);
    box-shadow: 0 18px 42px color-mix(in srgb, var(--ink) 18%, transparent);
}

.observer-combobox-summary {
    min-height: 33px;
    padding: 8px 11px;
    border-bottom: 1px solid var(--line);
    color: var(--muted);
    background: var(--surface-soft);
    font-size: 0.7rem;
    font-weight: 750;
    line-height: 1.35;
}

.observer-combobox-results {
    max-height: 326px;
    overflow-y: auto;
    overscroll-behavior: contain;
    scrollbar-color: color-mix(in srgb, var(--teal) 42%, var(--line)) transparent;
}

.observer-combobox-option {
    position: relative;
    display: grid;
    grid-template-columns: 38px minmax(0, 1fr);
    align-items: center;
    gap: 10px;
    width: 100%;
    min-height: 58px;
    padding: 6px 10px;
    border: 0;
    border-bottom: 1px solid color-mix(in srgb, var(--line) 72%, transparent);
    color: var(--ink);
    text-align: left;
    background: var(--surface);
    cursor: pointer;
    transition: background 120ms ease, box-shadow 120ms ease;
}

.observer-combobox-option:last-child {
    border-bottom: 0;
}

.observer-combobox-option:hover,
.observer-combobox-option.is-active {
    background: color-mix(in srgb, var(--teal) 11%, var(--surface));
}

.observer-combobox-option.is-selected {
    box-shadow: inset 3px 0 0 var(--teal);
}

.observer-combobox-option img {
    display: block;
    width: 38px;
    height: 46px;
    object-fit: cover;
    border: 1px solid var(--line);
    border-radius: 4px;
    background: var(--surface-muted);
}

.observer-combobox-option > span {
    min-width: 0;
}

.observer-combobox-option strong,
.observer-combobox-option small {
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.observer-combobox-option strong {
    font-size: 0.82rem;
    line-height: 1.3;
}

.observer-combobox-option small {
    margin-top: 2px;
    color: var(--muted);
    font-size: 0.7rem;
}

.observer-combobox-empty {
    margin: 0;
    padding: 18px 12px;
    color: var(--muted);
    text-align: center;
    font-size: 0.8rem;
}

html[data-theme-tone="dark"] .observer-combobox-input > img,
html[data-theme-tone="dark"] .observer-combobox-input button img {
    filter: brightness(0) invert(1);
}

.observer-profile-preview {
    display: grid;
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 14px;
    min-height: 154px;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 7px;
    background: color-mix(in srgb, var(--surface) 86%, var(--teal-soft));
}

.observer-profile-preview.is-student {
    background: color-mix(in srgb, var(--surface) 88%, var(--amber) 7%);
}

.observer-profile-preview > a {
    align-self: start;
    overflow: hidden;
    border-radius: 6px;
    background: var(--surface-muted);
}

.observer-profile-preview img {
    display: block;
    width: 96px;
    height: 120px;
    object-fit: cover;
}

.observer-profile-preview > div {
    min-width: 0;
}

.observer-profile-preview span {
    color: var(--teal);
    font-size: 0.68rem;
    font-weight: 900;
    text-transform: uppercase;
}

.observer-profile-preview h2 {
    margin: 2px 0 1px;
    font-size: 1.15rem;
    line-height: 1.18;
}

.observer-profile-preview strong {
    display: block;
    overflow: hidden;
    color: var(--ink);
    font-size: 0.82rem;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.observer-profile-preview p {
    display: -webkit-box;
    margin: 7px 0 0;
    overflow: hidden;
    color: var(--muted);
    font-size: 0.8rem;
    line-height: 1.42;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 3;
}

.observer-pair-arrow {
    display: grid;
    align-content: center;
    justify-items: center;
    color: var(--teal);
}

.observer-pair-arrow span {
    font-size: 2rem;
    font-weight: 900;
    line-height: 1;
}

.observer-pair-arrow small {
    margin-top: 4px;
    color: var(--muted);
    font-size: 0.66rem;
    font-weight: 900;
    text-transform: uppercase;
}

.observer-lesson-options {
    display: grid;
    grid-column: 1 / -1;
    grid-template-columns: minmax(0, 1fr) 190px;
    gap: 7px 16px;
    padding-top: 16px;
    border-top: 1px solid var(--line);
}

.observer-lesson-options > label {
    grid-column: 1;
}

.observer-lesson-options textarea {
    grid-column: 1;
}

.observer-duration-row {
    display: grid;
    grid-column: 2;
    grid-row: 1 / span 2;
    align-content: start;
    gap: 7px;
}

.observer-builder-actions {
    display: flex;
    grid-column: 1 / -1;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    padding-top: 15px;
    border-top: 1px solid var(--line);
}

.observer-builder-actions p {
    max-width: 670px;
    margin: 0;
    color: var(--muted);
    font-size: 0.78rem;
}

.observer-builder-actions p strong {
    color: var(--ink);
}

.observer-start-button {
    flex: 0 0 auto;
    min-width: 236px;
}

.observer-start-button img {
    filter: brightness(0) invert(1);
}

.observer-boundary-band {
    padding: 25px 0;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    background: var(--surface);
}

.observer-boundary-band .section-inner {
    display: grid;
    grid-template-columns: minmax(280px, 0.8fr) minmax(0, 1fr);
    align-items: center;
    gap: 34px;
}

.observer-boundary-band h2 {
    margin: 3px 0 0;
    font-size: 1.35rem;
}

.observer-boundary-band p:last-child {
    margin: 0;
    color: var(--muted);
}

.page-observer-classroom .classroom-app .classroom-stage {
    grid-template-columns: 66px minmax(0, 1fr) 370px;
    grid-template-rows: minmax(0, 1fr);
}

.page-observer-classroom .classroom-app.is-whiteboard-tools-folded[data-workspace-tab="whiteboard"] .classroom-stage,
.page-observer-classroom .classroom-app[data-workspace-tab]:not([data-workspace-tab="whiteboard"]) .classroom-stage {
    grid-template-columns: minmax(0, 1fr) 370px;
}

.observer-classroom-header {
    gap: 12px;
}

.observer-classroom-pair {
    display: flex;
    align-items: center;
    gap: 9px;
    min-width: 255px;
}

.observer-pair-avatars {
    position: relative;
    flex: 0 0 66px;
    height: 44px;
}

.observer-pair-avatars img {
    position: absolute;
    top: 1px;
    width: 42px;
    height: 42px;
    object-fit: cover;
    border: 2px solid var(--surface);
    border-radius: 50%;
    background: var(--surface-muted);
}

.observer-pair-avatars img:first-child {
    left: 0;
    z-index: 2;
}

.observer-pair-avatars img:last-child {
    right: 0;
}

.observer-classroom-pair-copy {
    display: grid;
    min-width: 0;
}

.observer-classroom-pair-copy > span {
    color: var(--teal);
    font-size: 0.61rem;
    font-weight: 900;
    text-transform: uppercase;
}

.observer-classroom-pair-copy strong {
    overflow: hidden;
    font-size: 0.85rem;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.observer-classroom-pair-copy strong i {
    margin: 0 3px;
    color: var(--muted);
    font-style: normal;
}

.observer-classroom-pair-copy small {
    max-width: 270px;
    overflow: hidden;
    color: var(--muted);
    font-size: 0.67rem;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.observer-classroom-controls {
    gap: 7px;
}

.observer-control-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    min-height: 40px;
    padding: 0 12px;
    border: 1px solid var(--line);
    border-radius: 6px;
    color: var(--ink);
    background: var(--surface);
    font: inherit;
    font-size: 0.78rem;
    font-weight: 900;
    cursor: pointer;
    transition: transform 140ms ease, border-color 140ms ease, background 140ms ease, box-shadow 140ms ease;
}

.observer-control-button:hover:not(:disabled) {
    transform: translateY(-1px);
    border-color: var(--teal);
    background: var(--teal-soft);
    box-shadow: 0 6px 16px color-mix(in srgb, var(--ink) 9%, transparent);
}

.observer-control-button.is-stop {
    color: color-mix(in srgb, var(--coral) 74%, var(--ink));
}

.observer-control-button:disabled {
    cursor: wait;
    opacity: 0.62;
}

.observer-control-button[hidden],
.observer-classroom-controls .classroom-call-button[hidden] {
    display: none !important;
}

.observer-lesson-panel {
    display: grid;
    grid-template-rows: auto auto minmax(0, 1fr) auto;
    min-width: 0;
    min-height: 0;
    border-left: 1px solid var(--line);
    background: var(--surface);
}

.observer-lesson-panel > header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 12px 13px 9px;
}

.observer-lesson-panel > header > div {
    display: grid;
}

.observer-lesson-panel > header span:first-child {
    color: var(--teal);
    font-size: 0.62rem;
    font-weight: 900;
    text-transform: uppercase;
}

.observer-lesson-panel > header strong {
    font-size: 0.96rem;
}

.observer-live-pill {
    padding: 4px 7px;
    border: 1px solid var(--line);
    border-radius: 999px;
    color: var(--muted);
    background: var(--surface-soft);
    font-size: 0.65rem;
    font-weight: 900;
}

.observer-live-pill.is-live {
    border-color: color-mix(in srgb, var(--teal) 45%, var(--line));
    color: color-mix(in srgb, var(--teal) 75%, var(--ink));
    background: color-mix(in srgb, var(--teal) 10%, var(--surface));
}

.observer-live-pill.is-paused {
    border-color: color-mix(in srgb, var(--amber) 48%, var(--line));
    color: color-mix(in srgb, var(--amber) 72%, var(--ink));
}

.observer-speaker-key {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 6px;
    padding: 0 10px 9px;
    border-bottom: 1px solid var(--line);
}

.observer-speaker-key a {
    display: flex;
    align-items: center;
    gap: 7px;
    min-width: 0;
    padding: 6px;
    border: 1px solid transparent;
    border-radius: 6px;
    color: var(--ink);
    background: var(--surface-soft);
    transition: border-color 140ms ease, background 140ms ease;
}

.observer-speaker-key a:hover {
    border-color: var(--teal);
    background: var(--teal-soft);
}

.observer-speaker-key img {
    flex: 0 0 auto;
    width: 32px;
    height: 32px;
    object-fit: cover;
    border-radius: 50%;
}

.observer-speaker-key a > span {
    display: grid;
    min-width: 0;
}

.observer-speaker-key strong {
    overflow: hidden;
    font-size: 0.72rem;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.observer-speaker-key small {
    color: var(--muted);
    font-size: 0.6rem;
}

.observer-transcript {
    min-height: 0;
    padding: 11px;
    overflow-y: auto;
    scroll-behavior: smooth;
}

.observer-transcript-empty {
    display: grid;
    justify-items: center;
    max-width: 250px;
    margin: 24px auto;
    color: var(--muted);
    text-align: center;
}

.observer-transcript-empty img {
    margin-bottom: 8px;
}

.observer-transcript-empty strong {
    color: var(--ink);
}

.observer-transcript-empty p {
    margin: 5px 0 0;
    font-size: 0.75rem;
    line-height: 1.5;
}

.observer-turn {
    display: grid;
    gap: 5px;
    margin-bottom: 10px;
    padding: 10px 11px;
    border: 1px solid var(--line);
    border-radius: 7px;
    background: var(--surface-soft);
}

.observer-turn.is-tutor {
    border-left: 3px solid var(--teal);
}

.observer-turn.is-student {
    border-left: 3px solid var(--amber);
    background: color-mix(in srgb, var(--surface) 93%, var(--amber) 7%);
}

.observer-turn > header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 8px;
}

.observer-turn > header strong {
    font-size: 0.72rem;
}

.observer-turn > header time {
    color: var(--muted);
    font-size: 0.59rem;
    font-variant-numeric: tabular-nums;
}

.observer-turn-copy {
    color: var(--ink);
    font-size: 0.78rem;
    line-height: 1.5;
}

.observer-turn-copy.is-typing {
    min-height: 1.5em;
    white-space: pre-wrap;
}

.observer-turn-copy.is-typing::after {
    display: inline-block;
    width: 2px;
    height: 1em;
    margin-left: 2px;
    border-radius: 1px;
    background: currentColor;
    vertical-align: -0.12em;
    animation: observer-typewriter-caret 720ms steps(1, end) infinite;
    content: "";
}

@keyframes observer-typewriter-caret {
    50% {
        opacity: 0;
    }
}

.observer-turn-copy > :first-child {
    margin-top: 0;
}

.observer-turn-copy > :last-child {
    margin-bottom: 0;
}

.observer-turn-copy pre {
    max-width: 100%;
    padding: 8px;
    overflow: auto;
    border-radius: 5px;
    background: var(--surface-muted);
    font-size: 0.7rem;
}

.observer-activity {
    display: flex;
    align-items: flex-start;
    gap: 7px;
    margin: 8px 1px;
    color: var(--muted);
    font-size: 0.68rem;
    line-height: 1.4;
}

.observer-activity::before {
    flex: 0 0 auto;
    width: 7px;
    height: 7px;
    margin-top: 0.35em;
    border-radius: 50%;
    background: var(--teal);
    content: "";
}

.observer-activity.is-error::before {
    background: var(--coral);
}

.observer-activity.is-working::before {
    animation: observer-pulse 900ms ease-in-out infinite;
}

@media (prefers-reduced-motion: reduce) {
    .observer-turn-copy.is-typing::after {
        animation: none;
    }
}

.observer-lesson-panel > footer {
    display: flex;
    justify-content: space-between;
    gap: 10px;
    padding: 8px 11px;
    border-top: 1px solid var(--line);
    color: var(--muted);
    font-size: 0.61rem;
    font-weight: 800;
}

.page-observer-classroom.is-observer-tutor-speaking .observer-speaker-key a:first-child,
.page-observer-classroom.is-observer-student-speaking .observer-speaker-key a:last-child {
    border-color: var(--teal);
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--teal) 24%, transparent);
}

@keyframes observer-pulse {
    50% { opacity: 0.35; transform: scale(0.78); }
}

@media (max-width: 1250px) {
    .page-observer-classroom .classroom-app .classroom-stage {
        grid-template-columns: 66px minmax(0, 1fr) 330px;
    }

    .page-observer-classroom .classroom-app.is-whiteboard-tools-folded[data-workspace-tab="whiteboard"] .classroom-stage,
    .page-observer-classroom .classroom-app[data-workspace-tab]:not([data-workspace-tab="whiteboard"]) .classroom-stage {
        grid-template-columns: minmax(0, 1fr) 330px;
    }

    .observer-classroom-pair {
        min-width: 205px;
    }

    .observer-classroom-pair-copy small {
        display: none;
    }

    .observer-classroom-controls .classroom-learning-timer {
        display: none;
    }
}

@media (max-width: 980px) {
    .page-observer-classroom .classroom-app {
        grid-template-rows: 64px minmax(0, 1fr);
    }

    .page-observer-classroom .classroom-app .classroom-stage {
        grid-template-columns: 66px minmax(0, 1fr);
        grid-template-rows: minmax(0, 1fr) 218px;
    }

    .page-observer-classroom .classroom-app.is-whiteboard-tools-folded[data-workspace-tab="whiteboard"] .classroom-stage,
    .page-observer-classroom .classroom-app[data-workspace-tab]:not([data-workspace-tab="whiteboard"]) .classroom-stage {
        grid-template-columns: minmax(0, 1fr);
        grid-template-rows: minmax(0, 1fr) 218px;
    }

    .page-observer-classroom .classroom-toolbar {
        grid-column: 1;
        grid-row: 1;
    }

    .page-observer-classroom .classroom-board-region {
        grid-column: 2;
        grid-row: 1;
    }

    .page-observer-classroom .classroom-app.is-whiteboard-tools-folded[data-workspace-tab="whiteboard"] .classroom-board-region,
    .page-observer-classroom .classroom-app[data-workspace-tab]:not([data-workspace-tab="whiteboard"]) .classroom-board-region {
        grid-column: 1;
    }

    .page-observer-classroom .observer-lesson-panel {
        grid-column: 1 / -1;
        grid-row: 2;
        border-top: 1px solid var(--line);
        border-left: 0;
    }

    .observer-speaker-key {
        display: none;
    }

    .observer-transcript {
        display: flex;
        gap: 9px;
        overflow-x: auto;
        overflow-y: hidden;
    }

    .observer-transcript-empty {
        align-self: center;
        min-width: 320px;
        margin: 0 auto;
    }

    .observer-turn {
        flex: 0 0 min(360px, 76vw);
        margin: 0;
        overflow-y: auto;
    }
}

@media (max-width: 760px) {
    .observer-builder-heading,
    .observer-boundary-band .section-inner {
        grid-template-columns: 1fr;
        gap: 18px;
    }

    .observer-builder-form {
        grid-template-columns: 1fr;
        padding: 15px;
    }

    .observer-pair-arrow {
        transform: rotate(90deg);
    }

    .observer-pair-arrow small {
        display: none;
    }

    .observer-lesson-options {
        grid-template-columns: 1fr;
    }

    .observer-lesson-options > label,
    .observer-lesson-options textarea,
    .observer-duration-row {
        grid-column: 1;
        grid-row: auto;
    }

    .observer-builder-actions {
        align-items: stretch;
        flex-direction: column;
    }

    .observer-start-button {
        width: 100%;
        min-width: 0;
    }
}

@media (max-width: 680px) {
    .page-observer-classroom .classroom-app .classroom-stage {
        grid-template-columns: 1fr;
        grid-template-rows: 58px minmax(0, 1fr) 210px;
    }

    .page-observer-classroom .classroom-app.is-whiteboard-tools-folded[data-workspace-tab="whiteboard"] .classroom-stage,
    .page-observer-classroom .classroom-app[data-workspace-tab]:not([data-workspace-tab="whiteboard"]) .classroom-stage {
        grid-template-columns: 1fr;
        grid-template-rows: minmax(0, 1fr) 210px;
    }

    .page-observer-classroom .classroom-toolbar {
        grid-column: 1;
        grid-row: 1;
    }

    .page-observer-classroom .classroom-board-region {
        grid-column: 1;
        grid-row: 2;
    }

    .page-observer-classroom .classroom-app.is-whiteboard-tools-folded[data-workspace-tab="whiteboard"] .classroom-board-region,
    .page-observer-classroom .classroom-app[data-workspace-tab]:not([data-workspace-tab="whiteboard"]) .classroom-board-region {
        grid-row: 1;
    }

    .page-observer-classroom .observer-lesson-panel {
        grid-column: 1;
        grid-row: 3;
    }

    .page-observer-classroom .classroom-app.is-whiteboard-tools-folded[data-workspace-tab="whiteboard"] .observer-lesson-panel,
    .page-observer-classroom .classroom-app[data-workspace-tab]:not([data-workspace-tab="whiteboard"]) .observer-lesson-panel {
        grid-row: 2;
    }

    .observer-pair-avatars,
    .observer-classroom-pair-copy > span,
    .observer-classroom-pair-copy small,
    .observer-classroom-controls .classroom-session-state,
    .observer-classroom-controls .classroom-leave-button {
        display: none;
    }

    .observer-classroom-pair {
        min-width: 0;
    }

    .observer-classroom-pair-copy strong {
        max-width: 115px;
        font-size: 0.72rem;
    }

    .observer-control-button,
    .observer-classroom-controls .classroom-call-button {
        width: auto;
        min-width: 40px;
        padding: 0 9px;
    }

    .observer-classroom-controls .classroom-call-button span,
    .observer-control-button.is-stop span {
        display: none;
    }
}

@media (max-width: 480px) {
    .observer-builder {
        padding-top: 24px;
    }

    .observer-profile-preview {
        grid-template-columns: 78px minmax(0, 1fr);
    }

    .observer-profile-preview img {
        width: 78px;
        height: 98px;
    }
}