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var(--space-3);font-size:var(--text-body-sm);font-weight:800;font-family:var(--font-ja);border:var(--border-sticker);background:var(--color-surface-raised);color:var(--color-text);border-radius:var(--radius-sm);cursor:pointer;white-space:nowrap;box-shadow:var(--shadow-card)}.btn-top-nav--icon{width:44px;min-width:44px;height:44px;min-height:44px;padding:0;display:inline-flex;align-items:center;justify-content:center;font-size:1.25rem;line-height:1;color:var(--color-text)}.btn-top-nav[hidden]{display:none}.btn-top-nav:active{transform:translate(1px,1px);box-shadow:2px 2px #5ec8ff8c;background:var(--color-surface-pressed)}.header{font-size:var(--text-title);color:var(--color-text);margin:0;font-weight:800;flex:1;text-align:left;line-height:1.35;min-width:0}.header[hidden],.top-bar[hidden],.top-bar--header-only .top-bar__nav{display:none}.top-bar--header-only 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.bottom-nav__item.is-active{color:var(--color-ink);font-weight:800;background:#5ec8ff38;box-shadow:inset 0 0 0 1.5px #2a3d7a47}.bottom-nav__icon{display:inline-flex;align-items:center;justify-content:center;width:32px;height:26px;border-radius:var(--radius-sm);color:inherit}.bottom-nav__icon svg{display:block;stroke:currentColor}.bottom-nav__label{font-size:.5rem;font-weight:700;line-height:1.1;letter-spacing:0;white-space:normal;text-align:center;max-width:100%}.bottom-nav__badge{position:absolute;top:2px;right:calc(50% - 22px);min-width:16px;height:16px;padding:0 4px;border-radius:999px;background:var(--color-error);color:#fff;font-size:.625rem;font-weight:800;line-height:16px;text-align:center}.bottom-nav__badge[data-badge-cleared]{background:#2a3d7a1f;color:var(--color-ink);font-weight:700}.bottom-nav__badge[hidden]{display:none}.bottom-nav__item:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}.study-actions-root{position:relative;z-index:1;display:flex;flex-direction:column;align-items:stretch;gap:6px;width:var(--dock-panel-width);max-width:100%;margin-inline:auto;padding:0;pointer-events:none;box-sizing:border-box;transform:translate(0);opacity:1;transition:transform .25s cubic-bezier(.22,1,.36,1),opacity .25s ease-out;will-change:transform,opacity}.study-actions-root.study-actions-root--dragging{transition:none}.study-actions-root.study-actions-root--exit-left{transform:translate(-42vw);opacity:0}.study-actions-root.study-actions-root--exit-right{transform:translate(42vw);opacity:0}.study-actions-root.study-actions-root--enter-prep{transition:none;transform:translate(0) scale(.98);opacity:0}.study-actions-root.study-actions-root--enter-active{transform:translate(0) scale(1);opacity:1}@media(prefers-reduced-motion:reduce){.study-actions-root{transition:none}}.study-actions-root[hidden],body.study-jump-sheet-open 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var(--space-6)}.skeleton-line--btn{width:100%;height:80px;margin-bottom:var(--space-3)}.skeleton-line--btn:last-of-type{margin-bottom:0}.top-deck-skeleton{height:100%;min-height:0;margin:0;border-radius:var(--radius-md)}.home-boot-skeleton.top-screen{display:flex;flex:1;flex-direction:column;min-height:0;gap:var(--space-3)}.home-boot-skeleton .top-screen__deck{flex:1;min-height:0;display:grid;grid-template-rows:minmax(0,1.15fr) minmax(0,1fr) minmax(0,1fr);gap:var(--space-3)}.study-loading{padding:var(--space-5) 0}.skeleton-card{min-height:240px;border-radius:var(--radius-lg);background:linear-gradient(90deg,var(--color-surface-muted) 0%,var(--color-surface-pressed) 50%,var(--color-surface-muted) 100%);background-size:200% 100%;animation:shimmer 1.2s ease-in-out infinite}.study-loading__text{margin-top:var(--space-3);font-size:var(--text-body-sm);color:var(--color-text-muted)}@keyframes shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}button{font-family:inherit}.btn-show{background:var(--color-accent);color:var(--color-on-accent);margin-bottom:var(--space-4);font-size:var(--text-body);font-weight:800;padding:var(--space-4);border-radius:var(--radius-md);border:none;width:100%;cursor:pointer;box-shadow:var(--shadow-primary)}.btn-show:active{transform:scale(.98)}.error-message{color:var(--color-error);margin-bottom:var(--space-4);line-height:1.55;text-align:left;font-size:var(--text-body-sm)}button:focus-visible,.study-card:focus-visible,.variant-accordion__trigger:focus-visible,.variant-accordion__speak:focus-visible,.genre-card:focus-visible,.top-nav-card:focus-visible,.home-tab:focus-visible,.home-menu__btn:focus-visible,.btn-top-nav:focus-visible,.btn-grade:focus-visible,.review-check:focus-within,.review-list__row:focus-visible,.review-list__sort:focus-visible{outline:3px solid var(--color-accent);outline-offset:2px}.review-list-screen{display:flex;flex:1 1 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var(--color-border);background:var(--color-surface-raised);color:var(--color-text);font-family:var(--font-ja);font-size:var(--text-body-sm);font-weight:600;box-shadow:var(--shadow-card)}.review-list__count{font-size:var(--text-caption);font-weight:700;color:var(--color-text-muted);white-space:nowrap}.review-list__status{margin:0;font-size:var(--text-body-sm);color:var(--color-text-muted);text-align:center;padding:var(--space-6) 0}.review-list__viewport{position:relative;flex:1 1 0;min-height:0;overflow-x:hidden;overflow-y:auto;border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-surface-raised);box-shadow:var(--shadow-card);-webkit-overflow-scrolling:touch;overscroll-behavior:contain}.review-list__spacer{width:100%;pointer-events:none}.review-list__rows{position:absolute;top:0;left:0;right:0;will-change:transform}.review-list__rows>[role=listitem]{width:100%}.review-list__row{width:100%;height:100%;min-height:0;padding:var(--space-2) var(--space-3);border:none;border-bottom:1px solid 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var(--color-border);flex-shrink:0}.study-jump-sheet__title{margin:0;font-size:var(--text-body);font-weight:800;color:var(--color-text)}.study-jump-sheet__close{flex-shrink:0;min-height:44px;padding:var(--space-2) var(--space-3);border:1px solid var(--color-border);border-radius:var(--radius-sm);background:var(--color-surface-raised);color:var(--color-text);font-family:var(--font-ja);font-size:var(--text-body-sm);font-weight:700;cursor:pointer}.study-jump-sheet__close:active{background:var(--color-surface-muted)}.study-jump-list__viewport{position:relative;flex:1;min-height:0;overflow-y:auto;-webkit-overflow-scrolling:touch}.study-jump-list__spacer{width:100%;pointer-events:none}.study-jump-list__rows{position:absolute;top:0;left:0;right:0;will-change:transform}.study-jump-list__row{width:100%;min-height:76px;padding:var(--space-3) var(--space-4);border:none;border-bottom:1px solid var(--color-border);background:transparent;text-align:left;cursor:pointer;display:flex;align-items:flex-start;gap:var(--space-3);box-sizing:border-box}.study-jump-list__row.is-current{background:var(--color-accent-soft)}.study-jump-list__row:last-child{border-bottom:none}.study-jump-list__row:active{background:var(--color-surface-muted)}.study-jump-list__row.is-current:active{background:var(--color-accent-soft)}.study-jump-list__row-index{flex-shrink:0;width:28px;height:28px;display:inline-flex;align-items:center;justify-content:center;border-radius:8px;background:var(--color-accent-soft);font-size:var(--text-caption);font-weight:800;color:var(--color-accent-dim);line-height:1}.study-jump-list__row.is-current .study-jump-list__row-index{background:var(--color-accent);color:#fff}.study-jump-list__row-body{min-width:0;display:flex;flex-direction:column;gap:var(--space-1)}.study-jump-list__prompt{font-size:var(--text-body-sm);font-weight:700;line-height:1.45}.study-jump-list__row-meta{font-size:var(--text-caption);font-weight:500;color:var(--color-text-muted);line-height:1.4}@keyframes study-jump-sheet-in{0%{opacity:0;transform:scale(.98)}to{opacity:1;transform:scale(1)}}.progress-jump-trigger:focus-visible,.study-jump-sheet__close:focus-visible,.study-jump-list__row:focus-visible{outline:3px solid var(--color-accent);outline-offset:2px}@media(prefers-reduced-motion:reduce){.card-stage{transition:none}.skeleton-card,.skeleton-line{animation:none}.progress-bar__fill{transition:none}.study-jump-sheet__panel,.study-milestone{animation:none}.voice-word,.voice-practice__wave span{transition:none}}