feat(island): 对齐 ClassIsland 课表提醒并恢复开合动画
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<script setup lang="ts">
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import { computed, nextTick, onMounted, onUnmounted, ref, watch } from 'vue';
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import type { IslandAppearance, IslandLessonReminder } from '@classhelper/shared';
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const props = defineProps<{
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reminder: IslandLessonReminder;
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now: number;
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appearance: IslandAppearance;
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motion: boolean;
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}>();
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const root = ref<HTMLElement>();
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const width = ref(480);
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const mask = computed(() => props.now < props.reminder.maskUntil);
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const title = computed(
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() => ({ prepare: '即将上课', 'on-class': '上课', break: '课间休息' })[props.reminder.kind],
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);
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const leftSeconds = computed(() =>
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Math.max(0, Math.ceil((props.reminder.lessonStartsAt - props.now) / 1000)),
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);
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const progress = computed(() =>
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Math.max(
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0,
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Math.min(
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1,
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(props.reminder.endsAt - props.now) / Math.max(1, props.reminder.endsAt - props.reminder.startedAt),
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),
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),
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);
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const course = computed(() =>
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props.reminder.kind === 'break' ? props.reminder.nextCourseName : props.reminder.courseName,
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);
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const time = computed(() =>
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props.reminder.kind === 'break'
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? `${props.reminder.nextStartTime || ''}–${props.reminder.nextEndTime || ''}`
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: `${props.reminder.startTime}–${props.reminder.endTime}`,
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);
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const regions = ref([0, 0, 0, 0, 0]);
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let frame = 0;
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// ClassIsland SlantedMaskControl：5 个斜切区域、30°偏移、两侧向中央打开，中央向两侧关闭。
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const polygons = computed(() => {
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const offset = Math.tan(Math.PI / 6) * 40;
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const total = width.value + offset;
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const edges = [0, 0.1, 0.3, 0.7, 0.9, 1];
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return regions.value.map((p, i) => {
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const center = (total * (edges[i]! + edges[i + 1]!)) / 2;
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const half = ((total * (edges[i + 1]! - edges[i]!) + 0.5) * p) / 2;
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return `${center - half},0 ${center + half},0 ${center + half - offset},40 ${center - half - offset},40`;
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});
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});
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function animateMask() {
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cancelAnimationFrame(frame);
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const target = mask.value ? 1 : 0;
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if (!props.motion) {
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regions.value = [target, target, target, target, target];
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return;
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}
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const from = [...regions.value];
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const started = performance.now();
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const delays = mask.value ? [0, 90, 120, 90, 0] : [120, 90, 0, 90, 120];
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const update = (at: number) => {
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const elapsed = (at - started) * props.appearance.speed;
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regions.value = from.map((value, i) => {
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const p = Math.max(0, Math.min(1, (elapsed - delays[i]!) / 360));
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const eased = target ? 1 - (1 - p) ** 4 : p * p;
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return value + (target - value) * eased;
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});
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if (elapsed < 480) frame = requestAnimationFrame(update);
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};
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frame = requestAnimationFrame(update);
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}
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watch(
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[mask, () => props.reminder.id, () => props.motion, () => props.appearance.speed],
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() => {
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if (mask.value) regions.value = [0, 0, 0, 0, 0];
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animateMask();
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},
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{ flush: 'post' },
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);
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let observer: ResizeObserver | undefined;
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onMounted(() => {
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observer = new ResizeObserver(() => {
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if (root.value) width.value = root.value.offsetWidth;
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});
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if (root.value) observer.observe(root.value);
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void nextTick(animateMask);
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});
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onUnmounted(() => {
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observer?.disconnect();
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cancelAnimationFrame(frame);
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});
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</script>
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<template>
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<div
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ref="root"
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class="ci-lesson"
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:class="{ 'ci-mask-active': mask }"
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:data-kind="reminder.kind"
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:style="{
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'--ci-speed': appearance.speed,
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'--ci-duration': motion ? `${200 / appearance.speed}ms` : '0ms',
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'--ci-title-duration': motion ? `${250 / appearance.speed}ms` : '0ms',
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'--ci-scale-duration': motion ? `${750 / appearance.speed}ms` : '0ms',
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'--ci-delay': motion ? `${260 / appearance.speed}ms` : '0ms',
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}"
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role="status"
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aria-live="polite"
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>
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<div class="ci-lesson-info">
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<span v-if="reminder.kind === 'prepare'" class="ci-countdown">
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距上课还剩
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<strong>{{ leftSeconds }}</strong>
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秒
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</span>
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<span v-else class="ci-countdown">课间休息</span>
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<span class="ci-lesson-course">
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<span>下节课是：</span>
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<strong>{{ course }}</strong>
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<small>{{ time }}</small>
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</span>
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</div>
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<div class="ci-lesson-progress" :style="{ transform: `scaleX(${progress})` }" />
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<svg class="ci-mask" :viewBox="`0 0 ${width} 40`" preserveAspectRatio="none" aria-hidden="true">
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<polygon v-for="(points, i) in polygons" :key="i" :points="points" />
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</svg>
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<div class="ci-mask-title" :class="{ 'ci-title-in': mask }">
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<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.8" aria-hidden="true">
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<path d="M6 9a6 6 0 0 1 12 0v4l2 3H4l2-3V9Zm4 10a2 2 0 0 0 4 0" />
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</svg>
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<strong>{{ title }}</strong>
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<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.8" aria-hidden="true">
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<circle cx="12" cy="12" r="9" />
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<path d="M12 7v5l3 2" />
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</svg>
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</div>
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</div>
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</template>
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<style scoped>
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.ci-lesson {
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position: relative;
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width: max-content;
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min-width: 300px;
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max-width: 800px;
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height: 40px;
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overflow: hidden;
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color: #fff;
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font-size: 16px;
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line-height: 1;
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border-radius: 8px;
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background: #20202080;
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}
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.ci-lesson-info {
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height: 40px;
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display: flex;
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align-items: center;
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justify-content: center;
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gap: 24px;
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padding: 0 28px;
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white-space: nowrap;
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transition: opacity var(--ci-duration) ease-in;
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}
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.ci-mask-active .ci-lesson-info {
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opacity: 0;
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}
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.ci-countdown {
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flex-shrink: 0;
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}
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.ci-countdown strong {
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font-variant-numeric: tabular-nums;
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}
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.ci-lesson-course {
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min-width: 0;
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display: flex;
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align-items: center;
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justify-content: center;
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gap: 6px;
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}
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.ci-lesson-course strong {
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font-size: 20px;
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min-width: 0;
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overflow: hidden;
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text-overflow: ellipsis;
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}
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.ci-lesson-course small {
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font-size: 14px;
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font-variant-numeric: tabular-nums;
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}
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.ci-mask {
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position: absolute;
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inset: 0;
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width: 100%;
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height: 40px;
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fill: var(--island-accent, #60a5fa);
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pointer-events: none;
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}
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.ci-mask-title {
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position: absolute;
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inset: 0;
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display: flex;
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justify-content: center;
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align-items: center;
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gap: 8px;
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opacity: 0;
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font-size: 18px;
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transform: scale(1.1);
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transition:
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opacity var(--ci-duration) linear,
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transform var(--ci-duration) cubic-bezier(0.5, 0, 0.75, 0);
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pointer-events: none;
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}
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.ci-mask-title svg {
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width: 20px;
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height: 20px;
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}
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.ci-title-in {
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animation:
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ci-title-enter var(--ci-title-duration) var(--ci-delay) cubic-bezier(0.25, 1, 0.5, 1) both,
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ci-title-scale var(--ci-scale-duration) var(--ci-delay) cubic-bezier(0.25, 1, 0.5, 1) both;
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}
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.ci-mask-title:not(.ci-title-in) {
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animation: ci-title-leave var(--ci-duration) linear both;
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}
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@keyframes ci-title-enter {
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from {
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opacity: 0;
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}
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to {
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opacity: 1;
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}
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}
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@keyframes ci-title-scale {
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from {
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transform: scale(1.1);
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}
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to {
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transform: scale(1);
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}
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}
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@keyframes ci-title-leave {
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from {
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opacity: 1;
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transform: scale(1);
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}
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to {
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opacity: 0;
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transform: scale(1.1);
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}
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}
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.ci-lesson-progress {
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position: absolute;
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bottom: 0;
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left: 0;
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width: 100%;
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height: 2px;
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background: var(--island-accent, #60a5fa);
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transform-origin: left;
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transition: transform 50ms linear;
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}
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</style>
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