:root{font-family:sans-serif;background:var(--tg-bg-color);color:var(--tg-text-color)}*{box-sizing:border-box}body{margin:0;min-width:320px;background:var(--tg-bg-color);color:var(--tg-text-color)}button{font:inherit;border:0;cursor:pointer;color:var(--tg-text-color);background:var(--tg-secondary-bg-color)}main{min-height:100vh;padding:16px 16px 72px}.decks,.session{max-width:640px;margin:0 auto}.wide{width:100%}.primary{padding:12px 16px;border-radius:10px;background:var(--tg-button-color);color:var(--tg-button-text-color)}.deck-list{margin-top:12px}.deck{width:100%;display:flex;justify-content:space-between;align-items:center;padding:16px 0;border-bottom:1px solid var(--tg-hint-color);text-align:left}.counts{display:inline-flex;gap:6px;white-space:nowrap}.count-new{color:#2481cc}.count-learning{color:#e8a33d}.count-review{color:#4caf50}.hint{color:var(--tg-hint-color)}.centered{min-height:60vh;display:grid;place-items:center;text-align:center}nav{position:fixed;bottom:0;left:0;right:0;display:grid;grid-template-columns:1fr 1fr;padding:8px;background:var(--tg-secondary-bg-color)}nav button{padding:10px}nav .active{color:var(--tg-button-color)}.session-header{display:grid;grid-template-columns:auto 1fr auto;gap:10px;align-items:center;margin-bottom:24px}.close{font-size:28px;line-height:1;padding:0 4px}.card-content{min-height:40vh;padding:16px;margin-bottom:16px;background:var(--tg-secondary-bg-color);overflow-wrap:anywhere}.card-content img,.card-content audio{max-width:100%;display:block;margin:12px auto}.card-content hr{border:0;border-top:1px solid var(--tg-hint-color);margin:20px 0}.ratings{display:grid;grid-template-columns:repeat(4,1fr);gap:6px}.ratings button{padding:10px 4px;border-radius:8px}.ratings small{display:block;margin-top:4px;color:var(--tg-hint-color)}.done{min-height:80vh;display:grid;place-content:center;gap:16px;text-align:center}.stats{max-width:640px;margin:0 auto}.stats-block{padding:16px 0;border-bottom:1px solid var(--tg-hint-color)}.stats-block h2{margin:0 0 12px;font-size:17px}.stats-summary{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.stats-summary div{min-width:0}.stats-summary strong,.retention{display:block;font-size:28px;font-variant-numeric:tabular-nums}.stats-summary span{display:block;color:var(--tg-hint-color);font-size:12px}.heatmap-scroll{overflow-x:auto;padding-bottom:4px}.heatmap{display:grid;grid-template-columns:repeat(26,10px);grid-template-rows:repeat(7,10px);gap:2px;width:max-content}.heatmap-cell{width:10px;height:10px;border-radius:2px;background:var(--tg-secondary-bg-color)}.heatmap-level-1{background:color-mix(in srgb,var(--tg-button-color) 25%,var(--tg-secondary-bg-color))}.heatmap-level-2{background:color-mix(in srgb,var(--tg-button-color) 50%,var(--tg-secondary-bg-color))}.heatmap-level-3{background:color-mix(in srgb,var(--tg-button-color) 75%,var(--tg-secondary-bg-color))}.heatmap-level-4{background:var(--tg-button-color)}.forecast{display:block;width:100%;height:140px;overflow:visible}.forecast-overdue{fill:#e8a33d}.forecast-future{fill:var(--tg-button-color)}.forecast-label,.forecast-maximum{fill:var(--tg-hint-color);font-size:8px}.rating-breakdown{display:grid;gap:8px;margin-top:14px}.rating-row{display:grid;grid-template-columns:58px 1fr 30px;align-items:center;gap:8px;font-size:13px}.rating-row b{font-variant-numeric:tabular-nums;text-align:right}.rating-track{height:8px;border-radius:4px;overflow:hidden;background:var(--tg-secondary-bg-color)}.rating-track i{display:block;height:100%;border-radius:inherit}.rating-again{background:#e8574d}.rating-hard{background:#e8a33d}.rating-good{background:#4caf50}.rating-easy{background:#2481cc}