:root{--bg: var(--tg-theme-bg-color, #ffffff);--text: var(--tg-theme-text-color, #111111);--hint: var(--tg-theme-hint-color, #8e8e93);--link: var(--tg-theme-link-color, #2481cc);--button: var(--tg-theme-button-color, #2481cc);--button-text: var(--tg-theme-button-text-color, #ffffff);--secondary-bg: var(--tg-theme-secondary-bg-color, #f1f1f4);--section-bg: var(--tg-theme-section-bg-color, var(--bg));--accent: var(--tg-theme-accent-text-color, var(--link));--destructive: var(--tg-theme-destructive-text-color, #e5393b);--subtitle: var(--tg-theme-subtitle-text-color, var(--hint));--separator: color-mix(in srgb, var(--hint) 25%, transparent);--success: #2fb344;--warning: #f0a020;--state-new: color-mix(in srgb, var(--hint) 45%, transparent);--state-familiar: var(--warning);--state-learned: var(--success);--radius: 14px;--gutter: 16px;color-scheme:light dark}@media(prefers-color-scheme:dark){:root.no-tg{--bg: #17212b;--text: #f5f5f5;--hint: #708499;--link: #6ab3f3;--button: #5288c1;--secondary-bg: #232e3c;--section-bg: #17212b}}*{box-sizing:border-box}html,body{margin:0;padding:0;background:var(--secondary-bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;font-size:16px;line-height:1.4;-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent;overscroll-behavior:none}#root{min-height:100vh;min-height:var(--tg-viewport-stable-height, 100vh)}button,input,textarea,select{font:inherit;color:inherit}a{color:var(--link)}.page{max-width:640px;margin:0 auto;padding:12px var(--gutter) 96px}.page-title{font-size:22px;font-weight:700;margin:8px 0 4px;word-break:break-word}.page-subtitle{color:var(--hint);margin:0 0 12px;white-space:pre-wrap;word-break:break-word}.muted{color:var(--hint)}.small{font-size:14px}.center{text-align:center}.row{display:flex;align-items:center;gap:8px}.row-between{display:flex;align-items:center;justify-content:space-between;gap:8px}.grow{flex:1;min-width:0}.stack{display:flex;flex-direction:column;gap:8px}.mt{margin-top:16px}.mb{margin-bottom:16px}.section{background:var(--section-bg);border-radius:var(--radius);padding:12px 14px;margin-bottom:12px}.section-title{font-size:13px;font-weight:600;text-transform:uppercase;letter-spacing:.02em;color:var(--subtitle);margin:18px 4px 8px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:none;border-radius:12px;padding:12px 16px;min-height:46px;background:var(--section-bg);color:var(--link);font-weight:600;cursor:pointer;transition:transform .08s ease,opacity .15s ease;user-select:none}.btn:active:not(:disabled){transform:scale(.98)}.btn:disabled{opacity:.45;cursor:default}.btn-primary{background:var(--button);color:var(--button-text)}.btn-secondary{background:color-mix(in srgb,var(--button) 12%,transparent);color:var(--button)}.btn-danger{color:var(--destructive)}.btn-ghost{background:transparent}.btn-block{width:100%}.btn-small{min-height:36px;padding:6px 12px;font-size:14px;border-radius:10px}.btn-icon{min-width:46px;padding:0;font-size:22px}.fallback-back{border:none;background:none;color:var(--link);padding:6px 0;font-size:16px;cursor:pointer}.fallback-main{position:fixed;left:0;right:0;bottom:0;z-index:20;padding:10px var(--gutter) calc(10px + env(safe-area-inset-bottom));background:color-mix(in srgb,var(--secondary-bg) 92%,transparent);backdrop-filter:blur(8px)}.fallback-main .btn{max-width:608px;margin:0 auto;display:flex}.list{background:var(--section-bg);border-radius:var(--radius);overflow:hidden;margin-bottom:12px}.list-item{display:block;width:100%;text-align:left;border:none;background:none;padding:12px 14px;cursor:pointer;position:relative}.list-item+.list-item:before{content:"";position:absolute;top:0;left:14px;right:0;height:1px;background:var(--separator)}.list-item:active{background:color-mix(in srgb,var(--hint) 10%,transparent)}.set-title{font-weight:600;font-size:17px;word-break:break-word}.set-meta{color:var(--hint);font-size:14px;margin-top:2px}.badge{display:inline-block;font-size:12px;font-weight:600;border-radius:999px;padding:2px 8px;background:color-mix(in srgb,var(--warning) 18%,transparent);color:var(--warning)}.progress{display:flex;height:6px;border-radius:3px;overflow:hidden;background:var(--state-new);margin-top:8px}.progress>span{display:block;height:100%}.progress .learned{background:var(--state-learned)}.progress .familiar{background:var(--state-familiar)}.progress-big{height:10px;border-radius:5px}.legend{display:flex;flex-wrap:wrap;gap:4px 14px;font-size:13px;color:var(--hint);margin-top:8px}.legend i{display:inline-block;width:8px;height:8px;border-radius:50%;margin-right:5px;vertical-align:1px}.dot{display:inline-block;width:8px;height:8px;border-radius:50%;flex:none}.dot-new{background:var(--state-new)}.dot-familiar{background:var(--state-familiar)}.dot-learned{background:var(--state-learned)}.modes{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:12px 0}.mode-btn{border:none;border-radius:var(--radius);background:var(--section-bg);padding:14px 6px;display:flex;flex-direction:column;align-items:center;gap:6px;cursor:pointer;font-weight:600;font-size:14px}.mode-btn .icon{font-size:26px;line-height:1}.mode-btn:disabled{opacity:.4}.mode-btn:active:not(:disabled){transform:scale(.97)}.card-row{display:flex;gap:10px;align-items:baseline;padding:10px 14px;position:relative}.card-row+.card-row:before{content:"";position:absolute;top:0;left:14px;right:0;height:1px;background:var(--separator)}.card-row .t{font-weight:600;word-break:break-word;white-space:pre-wrap}.card-row .d{color:var(--subtitle);word-break:break-word;white-space:pre-wrap}.field{display:block;margin-bottom:12px}.field-label{display:block;font-size:13px;color:var(--hint);margin:0 4px 6px}.input,.textarea{width:100%;border:1px solid transparent;border-radius:12px;background:var(--section-bg);padding:11px 12px;outline:none;resize:none}.input:focus,.textarea:focus{border-color:var(--button)}.input.invalid,.textarea.invalid{border-color:var(--destructive)}.textarea-big{min-height:180px;resize:vertical;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:14px}.error-text{color:var(--destructive);font-size:14px;margin:4px 4px 8px}.editor-card{background:var(--section-bg);border-radius:var(--radius);padding:10px 10px 10px 12px;margin-bottom:10px}.editor-card .num{color:var(--hint);font-size:13px}.editor-card textarea{background:var(--secondary-bg);margin-top:6px}.editor-card.invalid{box-shadow:inset 0 0 0 1px var(--destructive)}.chips{display:flex;flex-wrap:wrap;gap:6px}.chip{border:none;border-radius:999px;padding:7px 12px;font-size:14px;cursor:pointer;background:var(--section-bg);color:var(--text)}.chip.active{background:var(--button);color:var(--button-text)}.segmented{display:flex;background:var(--section-bg);border-radius:10px;padding:2px}.segmented button{flex:1;border:none;background:none;border-radius:8px;padding:8px 6px;font-size:14px;cursor:pointer}.segmented button.active{background:var(--button);color:var(--button-text);font-weight:600}.switch-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 0}.switch{position:relative;width:46px;height:28px;flex:none}.switch input{opacity:0;width:0;height:0}.switch span{position:absolute;inset:0;border-radius:14px;background:var(--state-new);transition:background .2s}.switch span:after{content:"";position:absolute;top:3px;left:3px;width:22px;height:22px;border-radius:50%;background:#fff;transition:transform .2s;box-shadow:0 1px 3px #0003}.switch input:checked+span{background:var(--button)}.switch input:checked+span:after{transform:translate(18px)}.preview-item{padding:8px 12px;font-size:14px;position:relative}.preview-item+.preview-item:before{content:"";position:absolute;top:0;left:12px;right:0;height:1px;background:var(--separator)}.preview-item .idx{color:var(--hint);min-width:28px;display:inline-block}.preview-item.error{background:color-mix(in srgb,var(--destructive) 10%,transparent)}.preview-item.error .msg{color:var(--destructive)}.preview-item.warning .msg{color:var(--warning)}.preview-item .raw{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;white-space:pre-wrap;word-break:break-all}.sheet-backdrop{position:fixed;inset:0;background:#00000059;z-index:30;animation:fade .15s ease}.sheet{position:fixed;left:0;right:0;bottom:0;z-index:31;max-height:85vh;overflow:auto;background:var(--secondary-bg);border-radius:18px 18px 0 0;padding:16px var(--gutter) calc(20px + env(safe-area-inset-bottom));animation:slide-up .2s ease}.sheet-inner{max-width:608px;margin:0 auto}.sheet h3{margin:0 0 12px;font-size:18px}@keyframes fade{0%{opacity:0}}@keyframes slide-up{0%{transform:translateY(40px);opacity:0}}.flash-top{display:flex;align-items:center;justify-content:space-between;margin:4px 0 12px}.flash-stage{perspective:1200px;margin:0 auto;touch-action:pan-y}.flash-card{position:relative;width:100%;height:min(58vh,420px);min-height:240px;cursor:pointer;transform-style:preserve-3d;transition:transform .35s cubic-bezier(.2,.7,.3,1)}.flash-card.flipped{transform:rotateY(180deg)}.flash-card.dragging{transition:none}.flash-face{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;background:var(--section-bg);border-radius:20px;box-shadow:0 2px 12px #00000014;display:flex;align-items:center;justify-content:center;padding:24px;text-align:center;font-size:22px;font-weight:500;overflow:auto;white-space:pre-wrap;word-break:break-word}.flash-face.back{transform:rotateY(180deg)}.flash-face .side-label{position:absolute;top:12px;left:16px;font-size:12px;color:var(--hint);font-weight:400}.flash-card .tint{position:absolute;inset:0;border-radius:20px;pointer-events:none;opacity:0;transition:opacity .1s}.flash-card .tint.known{background:color-mix(in srgb,var(--success) 25%,transparent)}.flash-card .tint.unknown{background:color-mix(in srgb,var(--destructive) 25%,transparent)}.flash-controls{display:grid;grid-template-columns:52px 1fr 1fr 52px;gap:8px;margin-top:14px}.btn-known{background:color-mix(in srgb,var(--success) 16%,transparent);color:var(--success)}.btn-unknown{background:color-mix(in srgb,var(--destructive) 13%,transparent);color:var(--destructive)}.flash-hint{text-align:center;color:var(--hint);font-size:13px;margin-top:10px}.result-hero{text-align:center;padding:28px 8px 12px}.result-hero .big{font-size:48px;line-height:1.1}.result-hero h2{margin:12px 0 6px}.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(90px,1fr));gap:8px;margin:12px 0}.stat{background:var(--section-bg);border-radius:var(--radius);padding:12px;text-align:center}.stat b{display:block;font-size:24px}.stat span{font-size:13px;color:var(--hint)}.question-prompt{background:var(--section-bg);border-radius:20px;padding:22px 18px;min-height:120px;display:flex;align-items:center;justify-content:center;text-align:center;font-size:21px;font-weight:500;white-space:pre-wrap;word-break:break-word;margin-bottom:14px}.question-label{font-size:13px;color:var(--hint);margin:0 4px 6px}.options{display:grid;gap:8px}.option{border:2px solid transparent;border-radius:14px;background:var(--section-bg);padding:14px;text-align:left;font-size:17px;cursor:pointer;white-space:pre-wrap;word-break:break-word}.option:active:not(:disabled){transform:scale(.99)}.option.correct{border-color:var(--success);background:color-mix(in srgb,var(--success) 14%,var(--section-bg))}.option.wrong{border-color:var(--destructive);background:color-mix(in srgb,var(--destructive) 12%,var(--section-bg))}.option:disabled{cursor:default}.answer-input{font-size:18px;padding:14px}.feedback{border-radius:14px;padding:12px 14px;margin-top:12px}.feedback.ok{background:color-mix(in srgb,var(--success) 14%,transparent)}.feedback.typo{background:color-mix(in srgb,var(--warning) 16%,transparent)}.feedback.bad{background:color-mix(in srgb,var(--destructive) 12%,transparent)}.feedback .title{font-weight:700;margin-bottom:4px}.feedback .answer{font-size:18px;white-space:pre-wrap;word-break:break-word}.diff-bad{background:color-mix(in srgb,var(--warning) 45%,transparent);border-radius:3px}.your-answer{color:var(--hint);font-size:14px;margin-top:6px;word-break:break-word}.round-bar{display:flex;gap:4px;margin:4px 0 12px}.round-bar span{flex:1;height:5px;border-radius:3px;background:var(--state-new)}.round-bar span.done{background:var(--success)}.spinner{width:28px;height:28px;border-radius:50%;margin:48px auto;border:3px solid color-mix(in srgb,var(--hint) 30%,transparent);border-top-color:var(--button);animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.empty{text-align:center;padding:48px 16px;color:var(--hint)}.empty .big{font-size:44px;margin-bottom:10px}.toast{position:fixed;left:50%;bottom:90px;transform:translate(-50%);z-index:40;background:#000c;color:#fff;padding:10px 16px;border-radius:12px;font-size:14px;animation:fade .15s ease;max-width:calc(100% - 32px)}.card-img{display:block;max-width:100%;border-radius:10px;object-fit:contain;background:color-mix(in srgb,var(--hint) 10%,transparent)}.card-img.thumb{width:52px;height:52px;object-fit:cover;border-radius:8px;flex:none}.card-img.face{max-height:62%;margin:0 auto 12px}.card-img.prompt{max-height:220px;margin:0 auto 10px;cursor:zoom-in}.card-img.option-img{max-height:90px}.question-prompt,.flash-face{flex-direction:column}.side-text{white-space:pre-wrap;word-break:break-word}.img-zoom{position:fixed;inset:0;z-index:50;background:#000000e6;display:flex;align-items:center;justify-content:center;padding:16px;animation:fade .15s ease}.img-zoom img{max-width:100%;max-height:100%;object-fit:contain}.card-row .thumb-col{display:flex;gap:6px;flex:none}.side-row{display:flex;gap:8px;align-items:flex-start;margin-top:6px}.side-row textarea{margin-top:0!important;flex:1}.photo-btn{flex:none;width:44px;min-height:44px;border:none;border-radius:12px;cursor:pointer;font-size:20px;background:var(--secondary-bg);color:var(--hint)}.photo-btn:disabled{opacity:.5}.side-photo{position:relative;display:inline-block;margin-top:6px}.side-photo .card-img{max-height:120px}.side-photo .remove{position:absolute;top:4px;right:4px;width:26px;height:26px;border-radius:50%;border:none;background:#0009;color:#fff;font-size:13px;cursor:pointer;line-height:26px;padding:0}.uploading{font-size:13px;color:var(--hint);margin-top:6px}.quizlet-box{border:1px dashed var(--separator);border-radius:var(--radius);padding:12px;margin-bottom:12px}.quizlet-thumb{width:44px;height:44px;object-fit:cover;border-radius:6px;flex:none}.progress-line{height:6px;border-radius:3px;background:var(--state-new);overflow:hidden;margin:8px 0}.progress-line>span{display:block;height:100%;background:var(--button);transition:width .2s}