.island-preview-stage { position: relative; height: 88px; margin-inline: -10px; isolation: isolate; overflow: hidden; pointer-events: none; }
.island-preview-stage[hidden] { display: none; }
.island-ribbon { --ir-surface: #10141d; --ir-ink: #f3f5f8; --ir-muted: #b2c1d5; --ir-active: #242b38; --ir-accent: #14fffa; position: absolute; height: 48px; max-width: calc(100% - 24px); color: var(--ir-ink); font-family: 'Microsoft YaHei UI', 'Microsoft YaHei', 'Segoe UI', sans-serif; font-size: 17px; font-weight: 700; line-height: 1; font-variant-numeric: tabular-nums; z-index: 1; overflow: hidden; border-radius: 24px; container-type: inline-size; pointer-events: auto; filter: drop-shadow(0 4px 12px #07101f26); }
.island-ribbon, .island-ribbon * { box-sizing: border-box; }
.island-ribbon[data-theme=light] { --ir-surface: #fcfdff; --ir-ink: #29486d; --ir-muted: #455d7b; --ir-active: #eaf4ff; --ir-accent: #65b2ed; --ir-cue: #ddf0ff; --ir-cue-ink: #1c517f; --ir-track: #cfdfee; --ir-progress-size: 2px; filter: drop-shadow(0 3px 8px #34567b24); }
.island-ribbon[data-theme=light] .ir-date, .island-ribbon[data-theme=light] .ir-courses { box-shadow: inset 0 0 0 1px #dce6f0; }
.island-ribbon[data-theme=light] .ir-course { color: #29486d; }
.island-ribbon[data-theme=light] .ir-course.is-past { color: var(--ir-muted); }
.island-ribbon[data-theme=light] .ir-course.is-current { color: #244c70; }
.island-ribbon[data-theme=light] .ir-time { color: #455d7b; }
.island-ribbon[data-theme=light] .ir-weekday { color: #455d7b; }
.island-ribbon[data-material=glass] { --ir-surface: rgb(20 39 59 / 72%); --ir-active: rgb(178 219 255 / 14%); --ir-cue: rgb(24 66 82 / 72%); --ir-cue-ink: #effcff; }
.island-ribbon[data-material=glass][data-theme=light] { --ir-surface: rgb(226 243 255 / 50%); --ir-active: rgb(242 250 255 / 55%); --ir-cue: rgb(209 237 255 / 68%); --ir-cue-ink: #1c517f; }
.island-ribbon[data-material=glass] :is(.ir-date, .ir-courses, .ir-message) { backdrop-filter: blur(18px) saturate(1.3); background-image: linear-gradient(160deg, #ffffff38, #ffffff05 48%, #a3d8ff16); box-shadow: inset 0 1px 1px #ffffffb3, inset 0 -1px 1px #40688940; }
.ir-layer { position: absolute; inset: 0; display: flex; gap: 12px; align-items: stretch; overflow: hidden; border-radius: 24px; }
.ir-layer { right: auto; width: 100%; }
.ir-divider { position: relative; flex: 0 0 var(--ir-divider-size, 12px); height: 36px; }
.ir-divider::after { content: ''; position: absolute; width: 1px; height: 18px; left: 50%; top: 9px; background: var(--ir-track, #737d8a); }
.ir-date { display: flex; align-items: center; justify-content: center; flex: 0 0 116px; gap: 6px; border-radius: 24px; background: var(--ir-surface); font-size: 16px; font-weight: 700; white-space: nowrap; }
.ir-calendar { font-size: 18px; font-weight: 700; }
.ir-date.is-stacked { flex-direction: column; gap: 0; }
.ir-date.is-stacked .ir-weekday { font-size: 12px; line-height: 18px; }
.ir-date.is-stacked .ir-calendar { font-size: 16px; line-height: 22px; }
.ir-courses { display: flex; align-items: center; justify-content: center; flex: 1; min-width: 0; gap: 8px; padding: 6px 12px; overflow: hidden; border-radius: 24px; background: var(--ir-surface); }
.ir-course { position: relative; display: flex; align-items: center; justify-content: center; flex: 0 0 60px; min-width: 0; height: 36px; font-size: 18px; font-weight: 700; white-space: nowrap; }
.ir-subject { overflow: hidden; text-overflow: ellipsis; }
.ir-course.is-current { flex: 0 0 194px; min-width: 0; gap: 10px; padding: 0 18px; border-radius: 14px; background: var(--ir-active); font-size: 20px; }
.ir-course.is-current strong { min-width: 0; overflow: hidden; text-overflow: ellipsis; font-size: inherit; font-weight: 700; }
.ir-course .ir-time { font-size: 14px; font-weight: 700; flex: none; }
.ir-course.is-current.is-stacked { flex-direction: column; gap: 0; padding-inline: 6px; height: 42px; font-size: 18px; }
.ir-course.is-current.is-stacked strong { line-height: 24px; }
.ir-course.is-current.is-stacked .ir-time { font-size: 12px; line-height: 16px; }
.ir-course.is-past { color: var(--ir-muted); }
.ir-progress { position: absolute; bottom: 0; left: 0; height: var(--ir-progress-size, 3px); width: 100%; background: var(--ir-accent); transform-origin: left; pointer-events: none; transition: transform 100ms linear; }
.ir-course-progress { position: absolute; bottom: 0; left: 12px; right: 12px; height: var(--ir-progress-size, 3px); border-radius: 2px; overflow: hidden; background: var(--ir-track, #737d8a); }
.ir-message { position: relative; display: flex; align-items: center; justify-content: center; flex: 1; min-width: 0; gap: 20px; padding: 0 18px; border-radius: 24px; background: var(--ir-surface); box-shadow: inset 0 calc(-1 * var(--ir-progress-size, 3px)) var(--ir-track, #717782); }
.ir-primary, .ir-secondary { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; min-width: 0; font-size: 20px; }
.ir-secondary { font-weight: 700; }
.ir-primary b, .ir-secondary strong { font-size: 22px; font-weight: 700; }
.ir-secondary .ir-detail-time { font-size: 16px; margin-left: 5px; }
.ir-message:has(.ir-secondary) > .ir-primary, .ir-secondary { flex: 1; text-align: center; }
.ir-accent { background: var(--ir-cue, var(--ir-accent)); color: var(--ir-cue-ink, #052a32); box-shadow: none; }
.ir-accent .ir-primary { font-size: 20px; font-weight: 700; }
.ir-accent { gap: 9px; }
.ir-icon { width: 22px; height: 22px; flex: none; }
.ir-pulse { position: absolute; left: 50%; top: 38px; border-radius: 50%; background: #14fffa; pointer-events: none; z-index: 0; }
@container (width < 480px) {
  .ir-layer { gap: 10px; }
  .ir-date { font-size: 14px; gap: 5px; }
  .ir-calendar { font-size: 16px; }
  .ir-courses { gap: 4px; padding-inline: 10px; }
  .ir-course { flex-basis: 44px; font-size: 16px; }
  .ir-course.is-current { font-size: 18px; gap: 8px; padding-inline: 12px; }
  .ir-course .ir-time { font-size: 13px; }
  .ir-message { gap: 8px; padding-inline: 12px; }
  .ir-primary, .ir-secondary { font-size: 14px; }
  .ir-primary b, .ir-secondary strong { font-size: 18px; }
  .ir-secondary .ir-detail-time { font-size: 12px; margin-left: 3px; }
  .ir-message:has(.ir-secondary) { flex-wrap: nowrap; }
  .ir-message:has(.ir-secondary) .ir-primary { flex: 0 0 auto; }
}
@media (prefers-reduced-motion: reduce) { .ir-pulse { display: none; } }
@media (prefers-reduced-motion: reduce) { .ir-progress { transition: none; } }