.student-page {
    min-width: 760px;
    min-height: 100vh;
    min-height: 100dvh;
    overflow-x: auto;
    background:
        radial-gradient(circle at 14% 5%, rgba(0, 144, 255, 0.07), transparent 26rem),
        var(--color-bg);
}

.student-app {
    width: min(1440px, 100%);
    min-height: 100vh;
    min-height: 100dvh;
    margin: 0 auto;
    padding: 26px clamp(24px, 4vw, 56px) 32px;
}

.student-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 74px;
    gap: 24px;
}

.student-brand {
    margin: 0;
    color: var(--color-black);
    font-size: clamp(1.6rem, 2.8vw, 2.35rem);
    line-height: 1;
    letter-spacing: -0.035em;
}

.session-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 11px 16px;
    border: 1px solid var(--color-border);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.86);
    font-size: 0.92rem;
}

.session-meta span { color: var(--color-grey-light); }
.session-meta strong { color: var(--color-grey-dark); }

.student-main { padding-top: 22px; }
.student-view { width: 100%; }

.lobby-card,
.complete-card {
    border: 1px solid var(--color-border);
    border-radius: 26px;
    background: var(--color-white);
    box-shadow: var(--shadow-card);
}

.lobby-card { padding: clamp(26px, 4vw, 48px); }

.lobby-copy {
    display: flex;
    align-items: center;
    gap: 18px;
    margin-bottom: 28px;
}

.lobby-copy h2,
.complete-card h2 {
    margin-bottom: 8px;
    color: var(--color-black);
    font-size: clamp(1.7rem, 3vw, 2.45rem);
    letter-spacing: -0.035em;
}

.lobby-copy p,
.complete-card p {
    margin-bottom: 0;
    color: var(--color-grey-light);
    font-size: 1.05rem;
}

.student-step {
    display: grid;
    flex: 0 0 auto;
    place-items: center;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    color: var(--color-white);
    background: var(--color-blue);
    font-size: 1.15rem;
    font-weight: 800;
}

.class-groups {
    display: grid;
    gap: 28px;
}

.class-group h3 {
    margin: 0 0 12px;
    color: var(--color-grey-dark);
    font-size: 0.9rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.workgroup-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.workgroup-button {
    position: relative;
    min-height: 104px;
    padding: 18px 20px;
    border: 1px solid #dfe6ed;
    border-radius: 18px;
    color: var(--color-grey-dark);
    background: #fbfcfd;
    text-align: center;
    cursor: pointer;
    transition: transform 150ms ease, border-color 150ms ease, box-shadow 150ms ease;
    touch-action: manipulation;
}

.workgroup-button:not(:disabled):hover,
.workgroup-button:not(:disabled):focus-visible {
    transform: translateY(-2px);
    border-color: rgba(0, 144, 255, 0.45);
    box-shadow: 0 9px 22px rgba(0, 144, 255, 0.11);
    outline: none;
}

.workgroup-button:disabled {
    cursor: not-allowed;
    opacity: 0.46;
}

.workgroup-name {
    display: block;
    margin-bottom: 8px;
    color: var(--color-black);
    font-size: 1.15rem;
    font-weight: 800;
}

.workgroup-meta {
    color: var(--color-grey-light);
    font-size: 0.88rem;
}

.student-message {
    margin: 12px 0 24px;
    padding: 16px 18px;
    border: 1px solid #e2e7ec;
    border-radius: 14px;
    color: var(--color-grey-dark);
    background: #f8fafc;
}

.student-message.is-waiting {
    border-color: rgba(0, 144, 255, 0.16);
    background: rgba(0, 144, 255, 0.055);
}

.lesson-view {
    min-height: calc(100vh - 130px);
    min-height: calc(100dvh - 130px);
}

.lesson-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    margin-bottom: 14px;
}

.lesson-title-block h2 {
    margin: 2px 0 0;
    color: var(--color-black);
    font-size: clamp(1.55rem, 2.8vw, 2.25rem);
    letter-spacing: -0.035em;
}

.task-progress {
    margin: 0;
    color: var(--color-blue);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.09em;
    text-transform: uppercase;
}

.pie-timer {
    --timer-angle: 360deg;
    display: grid;
    flex: 0 0 auto;
    place-items: center;
    width: 68px;
    height: 68px;
    border-radius: 50%;
    background: conic-gradient(var(--color-blue) var(--timer-angle), #dfe5eb 0);
    box-shadow: 0 5px 15px rgba(17, 17, 17, 0.08);
}

.pie-timer.is-low {
    background: conic-gradient(var(--color-red) var(--timer-angle), #f0dce1 0);
}

.pie-timer-inner {
    display: grid;
    place-items: center;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    color: var(--color-grey-dark);
    background: var(--color-white);
    font-size: 0.9rem;
    font-weight: 800;
    font-variant-numeric: tabular-nums;
}

.lesson-board {
    display: grid;
    grid-template-columns: minmax(0, 1fr) clamp(210px, 24vw, 310px);
    min-height: min(590px, calc(100vh - 220px));
    min-height: min(590px, calc(100dvh - 220px));
    overflow: hidden;
    border: 1px solid var(--color-border);
    border-radius: 26px;
    background: var(--color-white);
    box-shadow: var(--shadow-card);
}

.task-workspace {
    display: grid;
    grid-template-rows: minmax(280px, 1.08fr) minmax(190px, 0.82fr);
    min-width: 0;
    border-right: 1px solid var(--color-border);
}

.sentence-area,
.options-area {
    position: relative;
    min-width: 0;
    padding: clamp(22px, 3vw, 38px);
}

.sentence-area {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.options-area {
    border-top: 1px solid var(--color-border);
    background: #fafbfd;
}

.workspace-label {
    position: absolute;
    top: 18px;
    left: 22px;
    margin: 0;
    color: var(--color-grey-light);
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.sentence-line {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    justify-content: center;
    gap: 14px 11px;
    width: 100%;
    padding-top: 22px;
}

.sentence-part {
    display: grid;
    grid-template-rows: minmax(46px, auto) 22px;
    align-items: end;
    justify-items: center;
    min-width: 42px;
}

.static-text,
.slot-line {
    display: flex;
    align-items: center;
    min-height: 46px;
    color: var(--color-black);
    font-size: clamp(1.18rem, 2.15vw, 1.72rem);
    font-weight: 650;
    line-height: 1.25;
}

.sentence-slot {
    min-width: 112px;
    cursor: pointer;
}

.slot-line {
    justify-content: center;
    min-width: 112px;
    padding: 3px 12px 5px;
    border-bottom: 3px solid var(--color-grey-dark);
    transition: border-color 150ms ease, background 150ms ease, transform 150ms ease;
}

.sentence-slot.is-drop-target .slot-line,
.sentence-slot.is-selected-target .slot-line {
    border-color: var(--color-blue);
    background: rgba(0, 144, 255, 0.07);
    transform: translateY(-2px);
}

.sentence-slot.is-pending .slot-line {
    border-color: var(--color-blue);
    color: var(--color-blue);
    background: rgba(0, 144, 255, 0.055);
}

.sentence-slot.is-solved .slot-line {
    border-color: var(--color-green);
    background: rgba(50, 230, 151, 0.075);
}

.sentence-slot.is-revealed .slot-line {
    border-color: var(--color-green);
    color: var(--color-black);
    background: rgba(50, 230, 151, 0.30);
}

.part-index {
    display: grid;
    place-items: center;
    width: 21px;
    height: 21px;
    border-radius: 50%;
    color: var(--color-white);
    background: var(--color-black);
    font-size: 0.68rem;
    font-weight: 800;
}

.option-tray {
    display: flex;
    flex-wrap: wrap;
    align-content: center;
    justify-content: center;
    gap: 12px;
    min-height: 100%;
    padding-top: 20px;
}

.option-chip {
    min-height: 50px;
    padding: 0 18px;
    border: 1px solid #dce3e9;
    border-radius: 999px;
    color: var(--color-grey-dark);
    background: var(--color-white);
    box-shadow: 0 4px 12px rgba(17, 17, 17, 0.07);
    font-size: clamp(0.98rem, 1.6vw, 1.12rem);
    font-weight: 750;
    cursor: grab;
    user-select: none;
    -webkit-user-select: none;
    touch-action: none;
    transition: transform 120ms ease, border-color 120ms ease, box-shadow 120ms ease, opacity 120ms ease;
}

.option-chip:active { cursor: grabbing; }

.option-chip:hover,
.option-chip.is-selected {
    border-color: var(--color-blue);
    box-shadow: 0 6px 16px rgba(0, 144, 255, 0.15);
    transform: translateY(-1px);
}

.option-chip.is-dragging-source { opacity: 0.28; }
.option-chip.is-hidden { visibility: hidden; }
.option-chip.is-wrong { animation: chipWrong 420ms ease; }

.drag-ghost {
    position: fixed;
    z-index: 5000;
    pointer-events: none;
    margin: 0;
    opacity: 0.96;
    transform: scale(1.04) rotate(-1deg);
    box-shadow: 0 12px 30px rgba(17, 17, 17, 0.2);
}

.reaction-panel {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 28px 20px;
    overflow: hidden;
    background: linear-gradient(180deg, #fbfdff 0%, #f3f8fc 100%);
    text-align: center;
}

.reaction-bot {
    position: relative;
    width: min(180px, 82%);
    aspect-ratio: 1 / 1.16;
    margin-bottom: 22px;
    transform-origin: center bottom;
}

.bot-antenna {
    position: absolute;
    top: 0;
    left: 50%;
    width: 7px;
    height: 30px;
    border-radius: 6px;
    background: var(--color-grey-dark);
    transform: translateX(-50%);
}

.bot-antenna span {
    position: absolute;
    top: -8px;
    left: 50%;
    width: 17px;
    height: 17px;
    border-radius: 50%;
    background: var(--color-blue);
    transform: translateX(-50%);
}

.bot-head {
    position: absolute;
    top: 24px;
    left: 8%;
    width: 84%;
    height: 48%;
    border: 7px solid var(--color-grey-dark);
    border-radius: 34px;
    background: var(--color-white);
    box-shadow: inset 0 -8px 0 rgba(164, 164, 164, 0.12);
}

.bot-face {
    position: absolute;
    inset: 18% 13%;
    border-radius: 24px;
    background: #eef7ff;
}

.bot-eye {
    position: absolute;
    top: 32%;
    width: 15px;
    height: 15px;
    border-radius: 50%;
    background: var(--color-blue);
    transition: height 150ms ease, transform 150ms ease, background 150ms ease;
}

.bot-eye-left { left: 25%; }
.bot-eye-right { right: 25%; }

.bot-mouth {
    position: absolute;
    left: 50%;
    bottom: 24%;
    width: 42px;
    height: 10px;
    border-bottom: 5px solid var(--color-grey-dark);
    border-radius: 0 0 30px 30px;
    transform: translateX(-50%);
    transition: all 160ms ease;
}

.bot-body {
    position: absolute;
    bottom: 0;
    left: 21%;
    width: 58%;
    height: 35%;
    border: 7px solid var(--color-grey-dark);
    border-radius: 28px 28px 18px 18px;
    background: var(--color-blue);
}

.bot-body span {
    position: absolute;
    top: 27%;
    left: 50%;
    width: 26%;
    aspect-ratio: 1;
    border-radius: 50%;
    background: var(--color-white);
    transform: translateX(-50%);
}

.reaction-text {
    color: var(--color-black);
    font-size: 1.15rem;
}

.reaction-hint {
    max-width: 230px;
    margin: 8px 0 0;
    color: var(--color-grey-light);
    font-size: 0.9rem;
    line-height: 1.45;
}

.timeout-skip-button {
    min-width: 128px;
    margin-top: 20px;
    touch-action: manipulation;
}

.timeout-skip-button[hidden] {
    display: none !important;
}

.reaction-bot[data-reaction="thinking"] { animation: botThinking 650ms ease-in-out infinite alternate; }
.reaction-bot[data-reaction="thinking"] .bot-antenna span { animation: antennaThinking 520ms ease-in-out infinite alternate; }

.reaction-bot[data-reaction="correct"] .bot-eye {
    height: 8px;
    border-radius: 8px;
    background: var(--color-green);
}
.reaction-bot[data-reaction="correct"] .bot-mouth {
    width: 48px;
    height: 25px;
    border: 0;
    border-bottom: 6px solid var(--color-green);
    border-radius: 0 0 50% 50%;
}
.reaction-bot[data-reaction="correct"] { animation: botYes 420ms ease; }

.reaction-bot[data-reaction="incorrect"] { animation: botNo 430ms ease; }
.reaction-bot[data-reaction="incorrect"] .bot-eye { background: var(--color-red); }
.reaction-bot[data-reaction="incorrect"] .bot-mouth {
    width: 38px;
    height: 18px;
    border: 0;
    border-top: 5px solid var(--color-red);
    border-radius: 50% 50% 0 0;
}

.reaction-bot[data-reaction="alert"] { animation: botAlert 520ms ease-in-out infinite alternate; }
.reaction-bot[data-reaction="alert"] .bot-antenna span,
.reaction-bot[data-reaction="alert"] .bot-eye { background: var(--color-red); }

.reaction-bot[data-reaction="completed"] { animation: botJump 720ms cubic-bezier(.22,.8,.33,1); }
.reaction-bot[data-reaction="completed"] .bot-antenna span,
.reaction-bot[data-reaction="completed"] .bot-eye { background: var(--color-green); }

.complete-view {
    display: grid;
    min-height: calc(100vh - 150px);
    min-height: calc(100dvh - 150px);
    place-items: center;
}

.complete-card {
    width: min(620px, 100%);
    padding: 50px;
    text-align: center;
}

.complete-card .button { margin-top: 26px; }

.complete-icon {
    display: grid;
    place-items: center;
    width: 82px;
    height: 82px;
    margin: 0 auto 24px;
    border-radius: 50%;
    color: var(--color-white);
    background: var(--color-green);
    font-size: 2.2rem;
    font-weight: 900;
    box-shadow: 0 12px 30px rgba(50, 230, 151, 0.28);
}

.blocked-dot {
    width: 28px;
    height: 28px;
    margin: 0 auto 26px;
    border-radius: 50%;
    background: var(--color-red);
    box-shadow: 0 0 0 12px rgba(230, 50, 88, 0.09);
}

.student-toast {
    position: fixed;
    z-index: 6000;
    left: 50%;
    bottom: 26px;
    max-width: min(620px, calc(100vw - 48px));
    padding: 13px 18px;
    border-radius: 999px;
    color: var(--color-white);
    background: var(--color-grey-dark);
    box-shadow: 0 10px 26px rgba(17, 17, 17, 0.22);
    transform: translateX(-50%);
    font-weight: 700;
}

.confetti-layer {
    position: fixed;
    z-index: 5500;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.confetti-piece {
    position: absolute;
    top: -20px;
    width: var(--w);
    height: var(--h);
    border-radius: 2px;
    background: var(--piece-color);
    animation: confettiFall var(--duration) cubic-bezier(.18,.73,.44,1) var(--delay) forwards;
}

@keyframes botThinking {
    from { transform: translateY(0) rotate(-1deg); }
    to { transform: translateY(-7px) rotate(1deg); }
}

@keyframes antennaThinking {
    from { transform: translateX(-50%) scale(0.75); opacity: 0.55; }
    to { transform: translateX(-50%) scale(1.15); opacity: 1; }
}

@keyframes botYes {
    0%, 100% { transform: rotate(0); }
    35% { transform: rotate(4deg) scale(1.03); }
    70% { transform: rotate(-3deg); }
}

@keyframes botNo {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px) rotate(-3deg); }
    50% { transform: translateX(10px) rotate(3deg); }
    75% { transform: translateX(-7px) rotate(-2deg); }
}

@keyframes botAlert {
    from { transform: scale(0.98); }
    to { transform: scale(1.045); }
}

@keyframes botJump {
    0%, 100% { transform: translateY(0) scale(1); }
    42% { transform: translateY(-34px) scale(1.03, 0.98); }
    70% { transform: translateY(4px) scale(0.98, 1.04); }
}

@keyframes chipWrong {
    0%, 100% { transform: translateX(0); }
    33% { transform: translateX(-6px); }
    66% { transform: translateX(6px); }
}

@keyframes confettiFall {
    0% { transform: translate3d(0, -10px, 0) rotate(0deg); opacity: 1; }
    100% { transform: translate3d(var(--drift), calc(100vh + 70px), 0) rotate(var(--spin)); opacity: 0.95; }
}

@media (max-width: 1050px) {
    .student-app { padding: 20px 24px 26px; }
    .student-main { padding-top: 12px; }
    .lesson-board { grid-template-columns: minmax(0, 1fr) 220px; }
    .task-workspace { grid-template-rows: minmax(250px, 1fr) minmax(180px, .72fr); }
    .sentence-area, .options-area { padding: 22px; }
    .reaction-panel { padding-inline: 14px; }
    .workgroup-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-height: 720px) and (orientation: landscape) {
    /* iPad landscape: use the actually visible Safari viewport and spend less
       vertical space on chrome around the exercise. */
    .student-app {
        min-height: 100dvh;
        padding: 8px clamp(20px, 3vw, 36px);
    }

    .student-topbar {
        min-height: 44px;
        gap: 16px;
    }

    .student-topbar .eyebrow {
        margin-bottom: 3px;
        font-size: 0.69rem;
    }

    .student-brand {
        font-size: 1.65rem;
    }

    .session-meta {
        padding: 8px 13px;
        font-size: 0.84rem;
    }

    .student-main {
        padding-top: 6px;
    }

    .lesson-view {
        min-height: 0;
    }

    .lesson-header {
        margin-bottom: 6px;
        gap: 16px;
    }

    .lesson-title-block h2 {
        margin-top: 1px;
        font-size: 1.55rem;
        line-height: 1;
    }

    .task-progress {
        font-size: 0.69rem;
    }

    .pie-timer {
        width: 56px;
        height: 56px;
    }

    .pie-timer-inner {
        width: 43px;
        height: 43px;
        font-size: 0.82rem;
    }

    .lesson-board {
        height: calc(100vh - 142px);
        height: calc(100dvh - 142px);
        min-height: 0;
        border-radius: 20px;
    }

    .task-workspace {
        grid-template-rows: minmax(190px, 1.08fr) minmax(140px, 0.82fr);
    }

    .sentence-area,
    .options-area {
        padding: 18px 20px;
    }

    .workspace-label {
        top: 12px;
        left: 18px;
        font-size: 0.66rem;
    }

    .sentence-line {
        padding-top: 14px;
        gap: 10px 9px;
    }

    .sentence-part {
        grid-template-rows: minmax(42px, auto) 20px;
    }

    .static-text,
    .slot-line {
        min-height: 42px;
    }

    .option-tray {
        gap: 10px;
        padding-top: 14px;
    }

    .option-chip {
        min-height: 44px;
        padding-inline: 16px;
    }

    .reaction-panel {
        padding: 12px 14px;
    }

    .reaction-lottie {
        width: clamp(150px, 70%, 195px);
        min-height: 145px;
        max-height: 195px;
        margin-bottom: 6px;
    }

    .reaction-text {
        font-size: 1.05rem;
    }

    .reaction-hint {
        margin-top: 4px;
        font-size: 0.84rem;
        line-height: 1.25;
    }

    .timeout-skip-button {
        min-height: 44px;
        margin-top: 10px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        scroll-behavior: auto !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* v0.6 — Lottie reaction character */
.reaction-lottie {
    display: block;
    width: clamp(170px, 76%, 250px);
    max-width: 100%;
    aspect-ratio: 1 / 1;
    height: auto;
    min-height: 170px;
    max-height: 300px;
    margin: 0 auto 18px;
}


@media (max-height: 720px) and (orientation: landscape) {
    .reaction-lottie {
        width: clamp(150px, 70%, 195px);
        min-height: 145px;
        max-height: 195px;
        margin-bottom: 6px;
    }
}


/* v0.6.6 — maximize Lottie width and align reaction content to the top */
.reaction-panel {
    justify-content: flex-start;
    padding: 0 0 16px;
}

.reaction-lottie {
    width: 100%;
    max-width: none;
    min-height: 0;
    max-height: min(300px, 42dvh);
    margin: 0 auto 8px;
}

.reaction-text,
.reaction-hint {
    width: calc(100% - 28px);
    max-width: 230px;
    box-sizing: border-box;
}

@media (max-height: 720px) and (orientation: landscape) {
    .reaction-panel {
        padding: 0 0 8px;
    }

    .reaction-lottie {
        width: 100%;
        max-width: none;
        min-height: 0;
        max-height: min(220px, 34dvh);
        margin: 0 auto 4px;
    }

    .reaction-text,
    .reaction-hint {
        width: calc(100% - 24px);
    }
}

/* v0.9 — Discussion student view */
.discussion-student-board {
    position: relative;
    display: grid;
    grid-template-rows: auto auto minmax(0, 1fr) auto;
    gap: 18px;
    min-height: min(590px, calc(100dvh - 220px));
    padding: clamp(24px, 3vw, 38px);
    overflow: hidden;
    border: 1px solid var(--color-border);
    border-radius: 26px;
    background: var(--color-white);
    box-shadow: var(--shadow-card);
}

.discussion-student-intro {
    position: relative;
    padding-top: 22px;
    text-align: center;
}
.discussion-workspace-label { left: 0; top: 0; }
.discussion-student-intro h3 {
    margin: 0 0 5px;
    color: var(--color-black);
    font-size: clamp(1.25rem, 2vw, 1.65rem);
    letter-spacing: -.025em;
}
.discussion-student-intro > p:not(.workspace-label) {
    margin: 0;
    color: var(--color-grey-light);
}

.discussion-sentence-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}
.discussion-sentence-list.is-successive {
    grid-template-columns: minmax(0, 1fr);
}
.discussion-sentence-list.is-successive .discussion-sentence-card {
    min-height: 92px;
}
.discussion-sentence-list.is-successive .discussion-sentence-card p {
    font-size: clamp(1.08rem, 2vw, 1.42rem);
}
.discussion-sentence-card {
    display: grid;
    grid-template-columns: 34px minmax(0, 1fr);
    align-items: center;
    gap: 12px;
    min-height: 76px;
    padding: 14px 16px;
    border: 1px solid #dfe6ed;
    border-radius: 16px;
    background: #fbfcfd;
}
.discussion-sentence-number {
    display: grid;
    place-items: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    color: var(--color-white);
    background: var(--color-blue);
    font-weight: 800;
}
.discussion-sentence-card p {
    margin: 0;
    color: var(--color-black);
    font-size: clamp(1rem, 1.7vw, 1.28rem);
    font-weight: 700;
    line-height: 1.38;
}

.discussion-support-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px;
    min-height: 0;
}
.discussion-support-card {
    min-width: 0;
    padding: 14px;
    border: 1px solid var(--color-border);
    border-radius: 15px;
    background: #f7f9fb;
}
.discussion-support-card:nth-child(1) { background: #f0fff8; }
.discussion-support-card:nth-child(2) { background: #fff0f8; }
.discussion-support-card:nth-child(3) { background: #fefff0; }
.discussion-support-card:nth-child(4) { background: #f4faff; }
.discussion-support-card h4 {
    margin: 0 0 10px;
    color: var(--color-grey-dark);
    font-size: .72rem;
    letter-spacing: .08em;
    text-transform: uppercase;
}
.discussion-support-phrases {
    display: grid;
    gap: 7px;
}
.discussion-support-phrases span {
    display: block;
    padding: 8px 10px;
    border-radius: 10px;
    color: var(--color-grey-dark);
    background: var(--color-white);
    box-shadow: 0 2px 7px rgba(17, 17, 17, .04);
    font-size: clamp(.8rem, 1.15vw, .96rem);
    line-height: 1.3;
}

.discussion-student-actions {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
}
.discussion-previous-button,
.discussion-done-button { min-width: 150px; }
.discussion-previous-button[hidden],
.discussion-previous-button.is-hidden {
    display: none !important;
}

@media (max-height: 720px) and (orientation: landscape) {
    .discussion-student-board {
        min-height: calc(100dvh - 142px);
        height: calc(100dvh - 142px);
        gap: 10px;
        padding: 16px 20px;
    }
    .discussion-student-intro { padding-top: 17px; }
    .discussion-student-intro h3 { font-size: 1.15rem; }
    .discussion-sentence-list { gap: 8px; }
    .discussion-sentence-card { min-height: 58px; padding: 9px 12px; }
    .discussion-sentence-number { width: 27px; height: 27px; font-size: .78rem; }
    .discussion-sentence-card p { font-size: clamp(.92rem, 1.45vw, 1.12rem); }
    .discussion-support-grid { gap: 8px; }
    .discussion-support-card { padding: 9px; }
    .discussion-support-card h4 { margin-bottom: 6px; font-size: .66rem; }
    .discussion-support-phrases { gap: 5px; }
    .discussion-support-phrases span { padding: 5px 7px; font-size: .78rem; }
    .discussion-done-button { min-height: 42px; }
}

/* v0.10 — Poll student task */
.poll-student-board {
    position: relative;
    min-height: min(590px, calc(100dvh - 220px));
    padding: clamp(24px, 3.4vw, 44px);
    border: 1px solid var(--color-border);
    border-radius: 26px;
    background: var(--color-white);
    box-shadow: var(--shadow-card);
}
.poll-student-intro {
    position: relative;
    padding-top: 26px;
    text-align: center;
}
.poll-workspace-label { left: 0; top: 0; }
.poll-student-intro h3 {
    margin: 0 0 7px;
    color: var(--color-black);
    font-size: clamp(1.35rem, 2.5vw, 2rem);
    letter-spacing: -.025em;
}
.poll-student-intro > p:not(.workspace-label) { margin: 0; color: var(--color-grey-light); }
.poll-choice-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 13px;
    width: min(1120px, 100%);
    margin: clamp(24px, 3vw, 38px) auto 0;
}
.poll-choice-card {
    position: relative;
    display: grid;
    grid-template-columns: 38px minmax(0, 1fr) 24px;
    align-items: center;
    gap: 12px;
    min-height: 86px;
    padding: 15px 17px;
    border: 2px solid #e0e6eb;
    border-radius: 18px;
    background: #fbfcfd;
    cursor: pointer;
    transition: transform 140ms ease, border-color 140ms ease, box-shadow 140ms ease, background 140ms ease;
}
.poll-choice-card:hover,
.poll-choice-card.is-selected {
    transform: translateY(-1px);
    border-color: var(--color-blue);
    background: rgba(0,144,255,.045);
    box-shadow: 0 7px 19px rgba(0,144,255,.1);
}
.poll-choice-card.is-submitted {
    border-color: var(--color-green);
    background: rgba(50,230,151,.08);
}
.poll-choice-card.is-frozen {
    cursor: default;
}
.poll-choice-card.is-frozen:not(.is-submitted) {
    opacity: .72;
}
.poll-choice-card input {
    position: absolute;
    width: 1px;
    height: 1px;
    opacity: 0;
    pointer-events: none;
}
.poll-choice-number {
    display: grid;
    place-items: center;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    color: var(--color-white);
    background: var(--color-black);
    font-weight: 850;
}
.poll-choice-text {
    color: var(--color-black);
    font-size: clamp(1.28rem, 2vw, 1.62rem);
    font-weight: 750;
    line-height: 1.18;
    text-transform: uppercase;
}
.poll-choice-marker {
    display: grid;
    place-items: center;
    width: 22px;
    height: 22px;
    border: 2px solid #cbd4dc;
    border-radius: 50%;
    background: var(--color-white);
}
.poll-choice-card.is-selected .poll-choice-marker::after,
.poll-choice-card:has(input:checked) .poll-choice-marker::after {
    content: '';
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-blue);
}
.poll-choice-card.is-submitted .poll-choice-marker::after { background: var(--color-green); }
.poll-student-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 18px;
    margin-top: clamp(22px, 3vw, 36px);
}
.poll-status { min-width: 150px; margin: 0; color: var(--color-grey-light); text-align: right; }
.poll-vote-button { min-width: 150px; }

@media (max-height: 720px) and (orientation: landscape) {
    .poll-student-board { min-height: calc(100dvh - 142px); padding: 17px 22px; }
    .poll-student-intro { padding-top: 17px; }
    .poll-student-intro h3 { font-size: 1.18rem; }
    .poll-choice-list { gap: 9px; margin-top: 17px; }
    .poll-choice-card { min-height: 66px; padding: 10px 12px; border-radius: 14px; }
    .poll-choice-number { width: 28px; height: 28px; font-size: .78rem; }
    .poll-choice-text { font-size: clamp(1.08rem, 1.6vw, 1.28rem); }
    .poll-student-actions { margin-top: 14px; }
    .poll-vote-button { min-height: 42px; }
}

/* v0.18.3 — Discussion and Poll use the same topbar chrome as Sentences. */
.student-app.is-discussion-layout .discussion-student-board,
.student-app.is-poll-layout .poll-student-board {
    position: relative;
}

@media (max-height: 720px) and (orientation: landscape) {
    .student-app.is-discussion-layout .student-main,
    .student-app.is-poll-layout .student-main {
        padding-top: 6px;
    }

    .student-app.is-discussion-layout .discussion-student-board,
    .student-app.is-poll-layout .poll-student-board {
        min-height: calc(100dvh - 80px);
        height: calc(100dvh - 80px);
        border-radius: 20px;
    }

    .student-app.is-discussion-layout .discussion-student-intro,
    .student-app.is-poll-layout .poll-student-intro {
        padding-right: 190px;
    }
}

/* v0.11 — waiting gate between lesson blocks */
.waiting-view {
    display: grid;
    min-height: calc(100dvh - 130px);
    place-items: center;
}

.waiting-card {
    width: min(760px, 100%);
    padding: clamp(24px, 4vh, 42px) clamp(28px, 5vw, 58px);
    border: 1px solid var(--color-border);
    border-radius: 28px;
    background: var(--color-white);
    box-shadow: var(--shadow-card);
    text-align: center;
}

.waiting-robot-wrap {
    position: relative;
    display: grid;
    place-items: center;
    width: min(360px, 62vw);
    max-width: 100%;
    margin: 0 auto 8px;
}

.waiting-lottie {
    display: block;
    width: 100%;
    max-width: 100%;
    aspect-ratio: 1 / 1;
    height: auto;
    max-height: 38dvh;
}

.waiting-card h2 {
    margin: 5px 0 10px;
    color: var(--color-black);
    font-size: clamp(2rem, 4vw, 3.15rem);
    letter-spacing: -.04em;
}

.waiting-card > p:not(.eyebrow),
.waiting-message {
    max-width: 590px;
    margin: 0 auto;
    color: var(--color-grey-light);
    font-size: clamp(.98rem, 1.7vw, 1.12rem);
    line-height: 1.55;
}

.waiting-progress {
    margin-top: 20px;
    color: var(--color-grey-dark);
    font-size: .88rem;
    font-weight: 800;
}

.waiting-pulse {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 10px;
    color: var(--color-blue);
    font-size: .82rem;
    font-weight: 750;
}

.waiting-pulse::before {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-blue);
    content: '';
    animation: waitingPulse 1.25s ease-in-out infinite;
}

@keyframes waitingPulse {
    0%, 100% { opacity: .35; transform: scale(.8); }
    50% { opacity: 1; transform: scale(1.15); }
}

@media (max-height: 720px) and (orientation: landscape) {
    .waiting-view { min-height: calc(100dvh - 106px); }
    .waiting-card { padding-block: 18px 22px; }
    .waiting-robot-wrap { width: min(250px, 31vw); margin-bottom: 0; }
    .waiting-lottie { max-height: 31dvh; }
    .waiting-card h2 { margin-block: 2px 6px; font-size: clamp(1.65rem, 3vw, 2.25rem); }
    .waiting-progress { margin-top: 12px; }
}

/* v0.12 Explanation overlay */
.explanation-overlay{position:fixed;z-index:9000;inset:0;display:grid;grid-template-rows:1fr 1fr 1fr;background:rgba(0,0,0,.80);color:#fff;overflow:hidden;padding:20px 5vw 18px}
.explanation-overlay[hidden]{display:none!important}
.explanation-third{display:flex;align-items:center;justify-content:center;min-height:0;text-align:center}
.explanation-text{max-width:min(1150px,78vw);color:#fff;font-size:clamp(22px,2.5vw,42px);line-height:1.3;text-align:center}
.explanation-text *{max-width:100%}
.explanation-animation-wrap{overflow:hidden}
.explanation-lottie{display:block;width:min(390px,34vh,44vw);height:min(390px,34vh,44vw);max-width:100%;max-height:100%}
.explanation-action-wrap{align-items:center}
.explanation-okay{min-width:min(520px,65vw);min-height:74px;padding:14px 34px;border:0;border-radius:18px;background:var(--color-blue);color:#fff;font:inherit;font-size:clamp(1.15rem,2vw,1.55rem);font-weight:800;box-shadow:0 12px 28px rgba(0,144,255,.28);cursor:pointer}
.explanation-close{position:absolute;z-index:4;top:20px;right:24px;display:grid;place-items:center;width:48px;height:48px;border:0;border-radius:50%;background:transparent;color:#fff;cursor:pointer}
.explanation-close .fa-icon{display:block;width:24px;height:24px;background:currentColor;-webkit-mask:var(--icon-url) center / contain no-repeat;mask:var(--icon-url) center / contain no-repeat;filter:none}
.explanation-close .i-xmark{--icon-url:url('/assets/icons/xmark.svg')}
.explanation-pie{--explanation-angle:360deg;position:absolute;top:78px;right:25px;display:grid;place-items:center;width:52px;height:52px;border-radius:50%;background:conic-gradient(#fff var(--explanation-angle),rgba(255,255,255,.18) 0)}
.explanation-pie-inner{display:grid;place-items:center;width:40px;height:40px;border-radius:50%;background:rgba(0,0,0,.78);color:#fff;font-size:.8rem;font-weight:800}
.explanation-dont-show{position:absolute;right:24px;bottom:20px;display:flex;align-items:center;gap:8px;color:#fff;font-size:.95rem;cursor:pointer}
.explanation-dont-show input{width:20px;height:20px;accent-color:var(--color-blue)}
@media(max-height:720px) and (orientation:landscape){.explanation-overlay{padding-block:10px}.explanation-close{top:10px}.explanation-pie{top:62px}.explanation-dont-show{bottom:10px}.explanation-okay{min-height:58px}.explanation-lottie{width:min(280px,30vh,36vw);height:min(280px,30vh,36vw)}}

/* v0.12.3 Explanation rich text: CSP-safe size classes (no inline style attributes). */
.explanation-text .explanation-font-size-20{font-size:20px}
.explanation-text .explanation-font-size-24{font-size:24px}
.explanation-text .explanation-font-size-28{font-size:28px}
.explanation-text .explanation-font-size-32{font-size:32px}
.explanation-text .explanation-font-size-40{font-size:40px}
.explanation-text .explanation-font-size-48{font-size:48px}

/* v0.12.4 — iPad-first Sentences layout */
.student-app.is-task-topbar-layout .student-topbar {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
    align-items: center;
}

.student-brand-block { min-width: 0; }
.student-topbar-center {
    display: grid;
    min-width: 210px;
    place-items: center;
    text-align: center;
}
.student-topbar-right {
    display: flex;
    min-width: 0;
    align-items: center;
    justify-content: flex-end;
}

.student-app.is-task-topbar-layout .lesson-title-block {
    min-width: 190px;
    text-align: left;
}
.student-app.is-task-topbar-layout .lesson-title-block h2 {
    margin: 2px 0 0;
    font-size: clamp(1.55rem, 2.8vw, 2.25rem);
    line-height: 1;
}

.student-app.is-sentence-layout .lesson-board {
    position: relative;
    grid-template-columns: minmax(0, 1fr) clamp(240px, 24vw, 320px);
    grid-template-rows: minmax(270px, 1.35fr) minmax(190px, .75fr);
    overflow: visible;
}

.student-app.is-sentence-layout .task-workspace {
    display: contents;
}

.student-app.is-sentence-layout .sentence-area {
    grid-column: 1 / -1;
    grid-row: 1;
    min-width: 0;
    border: 0;
    border-bottom: 1px solid var(--color-border);
    border-radius: 26px 26px 0 0;
    background: var(--color-white);
}

.student-app.is-sentence-layout .options-area {
    grid-column: 1;
    grid-row: 2;
    min-width: 0;
    border-top: 0;
    border-radius: 0 0 0 26px;
}

.student-app.is-sentence-layout .reaction-panel {
    position: relative;
    z-index: 30;
    grid-column: 2;
    grid-row: 2;
    min-width: 0;
    overflow: visible;
    border-top: 1px solid var(--color-border);
    border-left: 1px solid var(--color-border);
    border-radius: 0 0 26px 0;
}

.task-meta-slot {
    position: absolute;
    z-index: 8;
    top: 17px;
    right: 20px;
}

.student-app.is-task-topbar-layout .task-meta-slot .session-meta {
    display: flex;
    background: rgba(255, 255, 255, .94);
}

.student-app.is-sentence-layout .sentence-line {
    flex-wrap: wrap;
    gap: 14px 10px;
    padding: 32px clamp(8px, 2vw, 28px) 14px;
}

.student-app.is-sentence-layout .static-text,
.student-app.is-sentence-layout .slot-line {
    white-space: nowrap;
}

/* Only actual gaps get a visible number. Static sentence parts keep the
   vertical index row empty so all baselines remain aligned. */
.student-app.is-sentence-layout .sentence-part:has(.static-text) .part-index {
    display: none;
}

.student-app.is-sentence-layout .timeout-skip-button {
    position: absolute;
    z-index: 12;
    right: 22px;
    bottom: 18px;
    min-width: 145px;
    margin: 0;
}

/* Reaction feedback becomes a temporary speech bubble above the robot.
   The layered, slightly rotated silhouette is adapted from the referenced
   CodePen speech-bubble idea; motion uses a reduced organic bounce. */
.reaction-bubble {
    position: absolute;
    z-index: 300;
    right: 16px;
    bottom: calc(100% - 20px);
    width: min(330px, calc(100vw - 56px));
    padding: 17px 44px 16px 19px;
    border-width: 0;
    border-color: transparent;
    border-radius: 18px;
    color: var(--color-black);
    background: #eaf6ff;
    box-shadow: 0 14px 34px rgba(17, 17, 17, .14);
    text-align: left;
    transform: rotate(-1.2deg);
    transform-origin: 78% 100%;
    isolation: isolate;
}

.reaction-bubble[hidden] { display: none !important; }

.reaction-bubble-text {
    display: block;
    width: 100%;
    transform: rotate(3deg);
    transform-origin: center;
}

.reaction-bubble::after {
    position: absolute;
    z-index: -2;
    inset: -2px;
    border-radius: inherit;
    background: rgba(255, 255, 255, .96);
    box-shadow: 0 7px 18px rgba(17, 17, 17, .08);
    content: '';
    transform: rotate(2deg) translate(5px, -3px) scale(1.01);
}

.reaction-bubble::before {
    position: absolute;
    z-index: -1;
    right: 100px;
    bottom: -24px;
    width: 34px;
    height: 30px;
    background: rgba(255, 255, 255, .96);
    clip-path: polygon(0 0, 100% 0, 72% 100%);
    content: '';
    transform: rotate(-8deg);
}

.reaction-bubble.is-bouncing {
    animation: reactionBubbleBounce 1.65s cubic-bezier(.28, .84, .42, 1) both;
}

.reaction-bubble .reaction-text,
.reaction-bubble .reaction-hint {
    display: block;
    width: auto;
    max-width: none;
    color: inherit;
    text-align: left;
}

.reaction-bubble .reaction-text {
    font-size: 1.05rem;
}

.reaction-bubble .reaction-hint {
    margin: 4px 0 0;
    color: #68727c;
    font-size: .86rem;
    line-height: 1.3;
}

.reaction-bubble-close {
    position: absolute;
    z-index: 4;
    top: 7px;
    right: 8px;
    display: grid;
    place-items: center;
    width: 32px;
    height: 32px;
    padding: 0;
    border: 0;
    border-radius: 50%;
    color: var(--color-grey-dark);
    background: transparent;
    cursor: pointer;
}

.reaction-bubble-close:hover,
.reaction-bubble-close:focus-visible {
    background: rgba(0, 144, 255, .08);
    outline: none;
}

.reaction-bubble-close .fa-icon {
    display: block;
    width: 16px;
    height: 16px;
    background: currentColor;
    -webkit-mask: var(--icon-url) center / contain no-repeat;
    mask: var(--icon-url) center / contain no-repeat;
}
.reaction-bubble-close .i-xmark { --icon-url: url('/assets/icons/xmark.svg'); }

@keyframes reactionBubbleBounce {
    0%   { transform: rotate(-1.2deg) scale(1, 1) translateY(0); }
    12%  { transform: rotate(-1.2deg) scale(1.025, .975) translateY(0); }
    32%  { transform: rotate(-1.2deg) scale(.985, 1.015) translateY(-9px); }
    52%  { transform: rotate(-1.2deg) scale(1.012, .988) translateY(0); }
    62%  { transform: rotate(-1.2deg) scale(1, 1) translateY(-3px); }
    72%, 100% { transform: rotate(-1.2deg) scale(1, 1) translateY(0); }
}

@media (max-height: 720px) and (orientation: landscape) {
    .student-app.is-task-topbar-layout .student-topbar {
        min-height: 48px;
        grid-template-columns: minmax(0, 1fr) minmax(190px, auto) minmax(0, 1fr);
    }

    .student-app.is-task-topbar-layout .lesson-title-block {
        min-width: 190px;
    }

    .student-app.is-task-topbar-layout .lesson-title-block h2 {
        font-size: 1.65rem;
    }

    .student-app.is-sentence-layout .student-main {
        padding-top: 6px;
    }

    .student-app.is-sentence-layout .lesson-board {
        height: calc(100dvh - 80px);
        min-height: 0;
        grid-template-columns: minmax(0, 1fr) clamp(230px, 24vw, 300px);
        grid-template-rows: minmax(210px, 1.38fr) minmax(150px, .72fr);
        border-radius: 20px;
    }

    .student-app.is-sentence-layout .sentence-area {
        padding: 18px 20px;
        border-radius: 20px 20px 0 0;
    }

    .student-app.is-sentence-layout .options-area {
        padding: 18px 20px;
        border-radius: 0 0 0 20px;
    }

    .student-app.is-sentence-layout .reaction-panel {
        padding: 0 0 6px;
        border-radius: 0 0 20px 0;
    }

    .student-app.is-sentence-layout .sentence-line {
        gap: 9px 8px;
        padding: 28px 8px 10px;
    }

    .student-app.is-sentence-layout .static-text,
    .student-app.is-sentence-layout .slot-line {
        min-height: 42px;
        font-size: clamp(1.08rem, 2vw, 1.55rem);
    }

    .student-app.is-sentence-layout .sentence-slot,
    .student-app.is-sentence-layout .slot-line {
        min-width: 105px;
    }

    .student-app.is-task-topbar-layout .task-meta-slot {
        top: 12px;
        right: 16px;
    }

    .student-app.is-task-topbar-layout .task-meta-slot .session-meta {
        padding: 8px 13px;
        font-size: .84rem;
    }

    .student-app.is-sentence-layout .reaction-lottie {
        width: 100%;
        max-width: none;
        max-height: min(205px, 30dvh);
        margin: 0 auto;
    }

    .student-app.is-sentence-layout .timeout-skip-button {
        right: 18px;
        bottom: 14px;
        min-height: 42px;
    }

    .reaction-bubble {
        right: 12px;
        bottom: calc(100% - 14px);
        width: min(300px, 34vw);
        padding: 14px 38px 13px 16px;
        border-radius: 15px;
    }

    .reaction-bubble .reaction-text { font-size: .98rem; }
    .reaction-bubble .reaction-hint { font-size: .8rem; }
}


/* v0.19 — teacher-authored Waiting task content */
.waiting-message .explanation-font-size-20{font-size:20px}
.waiting-message .explanation-font-size-24{font-size:24px}
.waiting-message .explanation-font-size-28{font-size:28px}
.waiting-message .explanation-font-size-32{font-size:32px}
.waiting-message .explanation-font-size-40{font-size:40px}
.waiting-message .explanation-font-size-48{font-size:48px}
.waiting-message p,.waiting-message div{margin:.2em 0}


/* v0.20.2 — voluntary Sprinter tasks offered from the Waiting screen */
.waiting-sprinter-bubble {
    position: absolute;
    z-index: 30;
    left: 50%;
    bottom: calc(100% - 42px);
    width: min(360px, calc(100vw - 64px));
    padding: 17px 20px;
    border: 0;
    border-radius: 18px;
    color: var(--color-black);
    background: #eaf6ff;
    box-shadow: 0 14px 34px rgba(17,17,17,.14);
    text-align: center;
    cursor: pointer;
    transform: translateX(-50%) rotate(-1.2deg);
    transform-origin: 62% 100%;
    isolation: isolate;
    animation: waitingSprinterBubbleBounce 1.65s cubic-bezier(.28,.84,.42,1) both;
}
.waiting-sprinter-bubble[hidden] { display: none !important; }
.waiting-sprinter-bubble::after {
    position: absolute;
    z-index: -2;
    inset: -2px;
    border-radius: inherit;
    background: rgba(255,255,255,.96);
    box-shadow: 0 7px 18px rgba(17,17,17,.08);
    content: '';
    transform: rotate(3deg) translate(5px, -3px) scale(1.01);
}
.waiting-sprinter-bubble::before {
    position: absolute;
    z-index: -1;
    right: 175px;
    bottom: -24px;
    width: 34px;
    height: 30px;
    background: rgba(255,255,255,.96);
    clip-path: polygon(0 0,100% 0,72% 100%);
    content: '';
    transform: rotate(-8deg);
}
.waiting-sprinter-bubble:hover,
.waiting-sprinter-bubble:focus-visible {
    outline: none;
    box-shadow: 0 18px 40px rgba(17,17,17,.18), 0 0 0 3px rgba(0,144,255,.12);
}
.waiting-sprinter-bubble:disabled { cursor: default; opacity: .65; }
.waiting-sprinter-bubble-text {
    display: block;
    width: 100%;
    transform: rotate(3deg);
    transform-origin: center;
}
.waiting-sprinter-bubble p,
.waiting-sprinter-bubble div { margin: .15em 0; }
.waiting-sprinter-bubble .explanation-font-size-20{font-size:20px}
.waiting-sprinter-bubble .explanation-font-size-24{font-size:24px}
.waiting-sprinter-bubble .explanation-font-size-28{font-size:28px}
.waiting-sprinter-bubble .explanation-font-size-32{font-size:32px}
.waiting-sprinter-bubble .explanation-font-size-40{font-size:40px}
.waiting-sprinter-bubble .explanation-font-size-48{font-size:48px}
@keyframes waitingSprinterBubbleBounce {
    0%   { opacity: 1; transform: translateX(-50%) rotate(-1.2deg) scale(1, 1) translateY(0); }
    12%  { transform: translateX(-50%) rotate(-1.2deg) scale(1.025, .975) translateY(0); }
    32%  { transform: translateX(-50%) rotate(-1.2deg) scale(.985, 1.015) translateY(-9px); }
    52%  { transform: translateX(-50%) rotate(-1.2deg) scale(1.012, .988) translateY(0); }
    62%  { transform: translateX(-50%) rotate(-1.2deg) scale(1, 1) translateY(-3px); }
    72%, 100% { opacity: 1; transform: translateX(-50%) rotate(-1.2deg) scale(1, 1) translateY(0); }
}
@media (max-height: 720px) and (orientation: landscape) {
    .waiting-sprinter-bubble {
        bottom: calc(100% - 30px);
        width: min(330px, calc(100vw - 54px));
        padding: 13px 16px;
    }
}


/* v0.20.7 — blocked Student access pulse and reopen feedback */
#blockedView .blocked-dot {
    position: relative;
    z-index: 0;
    isolation: isolate;
}

#blockedView .blocked-dot::before,
#blockedView .blocked-dot::after {
    position: absolute;
    z-index: -1;
    inset: 0;
    border: 3px solid var(--color-red);
    border-radius: 50%;
    content: '';
    opacity: 0;
    transform: scale(1);
    animation: blockedDotPulse 1.8s cubic-bezier(.2, .65, .3, 1) infinite;
}

#blockedView .blocked-dot::after {
    animation-delay: .6s;
}

@keyframes blockedDotPulse {
    0% { opacity: .62; transform: scale(.9); }
    70% { opacity: 0; transform: scale(2.45); }
    100% { opacity: 0; transform: scale(2.45); }
}