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var(--color-accent-border)}.completion-action-row{--action-accent: var(--completion-accent, var(--color-secondary));--action-accent-soft: var(--completion-accent-soft, var(--color-secondary-soft));--action-accent-border: var(--completion-accent-border, var(--color-secondary-border));position:relative;display:grid;grid-template-columns:44px minmax(0,1fr);gap:var(--space-3);align-items:center;overflow:hidden;min-height:72px;padding:var(--space-3) var(--space-4);background:var(--color-surface);border:1px solid var(--action-accent-border);border-radius:var(--radius-lg);color:inherit;text-align:left;text-decoration:none;box-shadow:var(--shadow-sm)}.completion-action-row:before{position:absolute;top:0;bottom:0;left:0;width:5px;content:"";background:var(--action-accent)}.completion-action-row>*{position:relative;z-index:1}.completion-action-row:hover{background:var(--color-surface-muted);color:inherit}.completion-action-row:focus-visible{outline:none;box-shadow:var(--shadow-focus)}.completion-action-row.is-exam-action{--action-accent: var(--color-secondary);--action-accent-soft: var(--color-secondary-soft);--action-accent-border: var(--color-secondary-border)}.completion-action-row.is-lesson-action{--action-accent: var(--color-primary);--action-accent-soft: var(--color-primary-soft);--action-accent-border: var(--color-primary-border)}.completion-action-row.is-review-action{--action-accent: var(--color-warning);--action-accent-soft: var(--color-warning-soft);--action-accent-border: var(--color-warning-border)}.completion-action-row.is-home-action{--action-accent: var(--color-accent);--action-accent-soft: var(--color-accent-soft);--action-accent-border: var(--color-accent-border)}.completion-action-icon{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;background:var(--action-accent-soft);border:1px solid var(--action-accent-border);border-radius:var(--radius-lg);color:var(--action-accent);font-family:var(--font-brand);font-size:var(--text-md);font-weight:900;line-height:1}.completion-action-copy{display:flex;min-width:0;flex-direction:column;gap:2px}.completion-action-title{color:var(--color-text);font-size:var(--text-base);font-weight:760;line-height:var(--line-tight);overflow-wrap:anywhere}.completion-action-detail{color:var(--color-text-muted);font-size:var(--text-xs);line-height:var(--line-normal);overflow-wrap:anywhere}.activity-start-screen{padding-bottom:calc(104px + env(safe-area-inset-bottom))}.topbar{position:sticky;top:0;z-index:10;margin:-16px -16px 16px;padding:12px 16px;background:color-mix(in srgb,var(--color-canvas) 92%,transparent);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border-bottom:1px solid var(--color-border)}.quick-advance-bar{position:fixed;top:0;right:max(0px,calc((100vw - 430px)/2));left:max(0px,calc((100vw - 430px)/2));z-index:30;height:3px;overflow:hidden;background:transparent}.quick-advance-bar>span{display:block;width:100%;height:100%;background:var(--color-success);transform-origin:left center;animation:quick-advance .5s linear forwards}.screen-interaction-blocker{position:fixed;inset:0;z-index:25;cursor:wait;background:transparent}.screen-advance-click-layer{position:fixed;inset:0;z-index:24;padding:0;background:transparent;border:0;cursor:pointer}@keyframes quick-advance{0%{transform:scaleX(0)}to{transform:scaleX(1)}}.identity-line{height:4px;overflow:hidden;border-radius:999px;background:linear-gradient(90deg,var(--color-primary) 0 33%,var(--color-warning) 33% 66%,var(--color-accent) 66% 100%)}.study-mark{position:relative;width:54px;height:42px;flex:none}.study-card{position:absolute;inset:0;border:1px solid var(--color-border-strong);border-radius:8px;background:var(--color-surface-raised);box-shadow:var(--shadow-sm)}.study-card:nth-child(1){transform:translate(8px,-5px) rotate(5deg);border-color:var(--color-warning-border)}.study-card:nth-child(2){transform:translate(3px) rotate(-3deg);border-color:var(--color-accent-border)}.study-card:nth-child(3){display:grid;place-items:center;color:var(--color-primary);font-weight:800;letter-spacing:0}.bottom-action{position:fixed;right:max(16px,calc((100vw - 430px)/2 + 16px));bottom:0;left:max(16px,calc((100vw - 430px)/2 + 16px));z-index:20;padding:12px 0 16px;background:linear-gradient(180deg,transparent,var(--color-canvas) 24%)}.bottom-action-bar{position:fixed;right:0;bottom:0;left:0;z-index:20;display:flex;justify-content:center;padding:12px 16px calc(12px + env(safe-area-inset-bottom));background:color-mix(in srgb,var(--color-surface) 94%,transparent);border-top:1px solid var(--color-border);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.bottom-action-inner{display:grid;grid-template-columns:1fr;gap:var(--space-2);width:100%;max-width:calc(var(--app-max-width) - 32px)}.bottom-action-inner.two-actions{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}.bottom-action-inner>*{width:100%;min-width:0}.bottom-action-inner .bottom-action-button{padding-right:var(--space-3);padding-left:var(--space-3);font-size:var(--text-sm);line-height:var(--line-tight);white-space:nowrap}.metric-bar{display:grid;gap:2px;height:12px;overflow:hidden;padding:2px;background:var(--color-surface);border:1px solid var(--color-border-strong);border-radius:999px}.metric-bar-segment{min-width:4px;height:100%;background:var(--segment-fill);border:1px solid var(--segment-border);border-radius:999px}.metric-bar-segment.is-learned{--segment-fill: linear-gradient( 180deg, var(--color-accent-soft) 0%, color-mix(in srgb, var(--color-accent) 58%, var(--color-accent-soft)) 100% );--segment-border: var(--color-accent-border)}.metric-bar-segment.is-practice{--segment-fill: linear-gradient( 180deg, var(--color-warning-soft) 0%, color-mix(in srgb, var(--color-warning) 58%, var(--color-warning-soft)) 100% );--segment-border: var(--color-warning-border)}.metric-bar-segment.is-recent-fail{--segment-fill: linear-gradient( 180deg, var(--color-danger-soft) 0%, color-mix(in srgb, var(--color-danger) 58%, var(--color-danger-soft)) 100% );--segment-border: var(--color-danger-border)}.metric-bar-segment.is-unseen{--segment-fill: linear-gradient( 180deg, var(--color-surface-muted) 0%, color-mix(in srgb, var(--color-border-strong) 58%, var(--color-surface-muted)) 100% );--segment-border: var(--color-border-strong)}.metric-card-tone-accent{background:linear-gradient(180deg,color-mix(in srgb,var(--color-accent-soft) 72%,var(--color-surface)) 0%,var(--color-surface) 100%);border-color:var(--color-accent-border)}.metric-card-tone-warning{background:linear-gradient(180deg,color-mix(in srgb,var(--color-warning-soft) 72%,var(--color-surface)) 0%,var(--color-surface) 100%);border-color:var(--color-warning-border)}.metric-card-tone-danger{background:linear-gradient(180deg,color-mix(in srgb,var(--color-danger-soft) 72%,var(--color-surface)) 0%,var(--color-surface) 100%);border-color:var(--color-danger-border)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.hover\:border-\[var\(--color-border-strong\)\]:hover{border-color:var(--color-border-strong)}.hover\:bg-\[var\(--color-primary-hover\)\]:hover{background-color:var(--color-primary-hover)}.hover\:bg-\[var\(--color-secondary-soft\)\]:hover{background-color:var(--color-secondary-soft)}.hover\:bg-\[var\(--color-surface-muted\)\]:hover{background-color:var(--color-surface-muted)}.disabled\:pointer-events-none:disabled{pointer-events:none}.disabled\:opacity-55:disabled{opacity:.55}