:root{color-scheme:light;--bg: #fff7ed;--surface: #ffffff;--surface-2: #ffedd5;--text: #000000;--muted: #6b7280;--border: #fed7aa;--primary: #f97316;--primary-strong: #ea580c;--primary-soft: #ffedd5;--green: #22c55e;--blue: #1cb0f6;--yellow: #ffc800;--red: #ff4b4b;--pink: #ff86d0;--shadow: 0 18px 45px rgba(154, 88, 30, .16);--button-shadow: inset 0 -4px 0 rgba(0, 0, 0, .16)}:root[data-theme=dark]{color-scheme:dark;--bg: #17120f;--surface: #241c17;--surface-2: #33251b;--text: #f9fafb;--muted: #b6aaa1;--border: #4b3424;--primary: #fb923c;--primary-strong: #f97316;--primary-soft: #3b2719;--green: #4ade80;--blue: #1cb0f6;--yellow: #fbbf24;--red: #f87171;--shadow: 0 18px 45px rgba(0, 0, 0, .28)}*{box-sizing:border-box}body{margin:0;min-width:320px;overflow-x:hidden;background:var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Microsoft YaHei,sans-serif}body.resizing-answer-dock{cursor:col-resize;-webkit-user-select:none;user-select:none}button,input,select,textarea{font:inherit}button{cursor:pointer;transition:transform .14s ease,box-shadow .14s ease,background .14s ease,border-color .14s ease}button:active{transform:translateY(2px) scale(.98)}button:disabled{cursor:not-allowed;opacity:.45}.app-shell{display:grid;grid-template-columns:248px minmax(0,1fr);min-height:100vh}.study-immersive-active .app-shell{display:block}.study-immersive-active .sidebar,.study-immersive-active .topbar,.study-immersive-active .study-selector{display:none}.study-immersive-active .main{min-height:100vh;width:min(1680px,100%);padding:14px clamp(8px,1.4vw,24px)}.sidebar{position:sticky;top:0;display:flex;flex-direction:column;gap:10px;height:100vh;padding:22px;background:var(--surface);border-right:1px solid var(--border)}.brand{display:flex;align-items:center;gap:10px;margin-bottom:18px;font-size:20px;font-weight:900}.brand-mark{display:grid;width:38px;height:38px;place-items:center;border-radius:8px;background:var(--primary);color:#fff;box-shadow:var(--button-shadow);animation:bob 2.8s ease-in-out infinite}.user-pill{display:flex;align-items:center;gap:8px;min-height:38px;margin:-4px 0 12px;padding:8px 10px;overflow:hidden;border:1px solid var(--border);border-radius:8px;background:var(--primary-soft);color:var(--primary-strong);font-weight:900}.user-pill svg{width:18px;height:18px;flex:0 0 auto}.user-pill span{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.nav-button,.deck-list-item{display:flex;align-items:center;gap:12px;width:100%;min-height:48px;padding:10px 12px;border:1px solid transparent;border-radius:8px;background:transparent;color:var(--muted);font-weight:800;text-align:left}.nav-button svg,.icon-button svg,.mini-button svg,.primary-button svg,.rating svg,.listen-button svg,.deck-menu-popover svg{width:20px;height:20px}.nav-button.active,.nav-button:hover,.deck-list-item.active,.deck-list-item:hover{background:var(--primary-soft);color:var(--primary-strong);border-color:var(--border)}.main{width:min(1180px,100%);margin:0 auto;padding:26px}.icp-footer{padding:22px 12px 2px;color:var(--muted);text-align:center;font-size:13px;font-weight:800}.icp-footer a{color:inherit;text-decoration:none}.icp-footer a:hover{color:var(--primary-strong);text-decoration:underline}.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:24px}.topbar h1,.hero-panel h2,.section-heading h2,.panel h2{margin:0}.topbar h1{font-size:34px}.eyebrow{margin:0 0 5px;color:var(--primary-strong);font-weight:900;letter-spacing:0}.top-actions,.rating-row,.word-title,.toolbar,.inline-form,.progress-line{display:flex;align-items:center;gap:10px}.panel-heading{display:flex;align-items:center;justify-content:space-between;gap:12px}.icon-button,.mini-button{display:inline-grid;width:42px;height:42px;place-items:center;border:1px solid var(--border);border-radius:8px;background:var(--surface);color:var(--text)}.icon-button:hover,.mini-button:hover,.deck-card:hover,.word-card:hover,.choice-grid button:hover,.mode-tabs button:hover{transform:translateY(-2px)}.mini-button{width:34px;height:34px}.icon-button.strong,.mini-button.starred{background:var(--primary);color:#fff}.mini-button.danger{color:var(--red)}.primary-button,.rating,.sync-button,.listen-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 18px;border:0;border-radius:8px;background:var(--primary);color:#fff;font-weight:900;box-shadow:var(--button-shadow)}.primary-button:hover{background:var(--primary-strong)}.secondary-button{background:var(--blue)}.danger-button{background:var(--red)}.sync-button{min-height:42px;border:1px solid var(--border);background:var(--surface);color:var(--text);box-shadow:none}.sync-button svg{width:18px;height:18px}.sync-button.syncing svg{animation:spin .9s linear infinite}.sync-button.success{border-color:color-mix(in srgb,var(--green),transparent 35%);color:var(--green)}.sync-button.error,.sync-button.conflict{border-color:color-mix(in srgb,var(--red),transparent 35%);color:var(--red)}.stack{display:flex;flex-direction:column;gap:18px}.hero-panel,.panel,.metric,.deck-card,.word-card,.study-panel{background:var(--surface);border:1px solid var(--border);border-radius:8px;box-shadow:var(--shadow)}.hero-panel{position:relative;display:flex;align-items:center;justify-content:space-between;gap:20px;overflow:hidden;padding:28px;animation:pop-in .36s cubic-bezier(.22,1.35,.36,1) both}.daily-hero{min-height:210px;border-color:color-mix(in srgb,var(--primary),var(--green) 28%);background:radial-gradient(circle at 78% 14%,color-mix(in srgb,var(--yellow),transparent 52%),transparent 24%),radial-gradient(circle at 18% 82%,color-mix(in srgb,var(--blue),transparent 72%),transparent 30%),linear-gradient(135deg,color-mix(in srgb,var(--surface),var(--primary-soft) 64%),color-mix(in srgb,var(--surface),var(--green) 10%))}.daily-hero.complete{border-color:color-mix(in srgb,var(--green),transparent 22%);background:radial-gradient(circle at 80% 18%,color-mix(in srgb,var(--yellow),transparent 42%),transparent 24%),radial-gradient(circle at 20% 78%,color-mix(in srgb,var(--blue),transparent 68%),transparent 32%),linear-gradient(135deg,color-mix(in srgb,var(--green),transparent 76%),color-mix(in srgb,var(--surface),var(--yellow) 10%))}.daily-hero>*:not(.daily-glow){position:relative;z-index:2}.daily-glow{position:absolute;right:-86px;top:-96px;width:260px;aspect-ratio:1;border:22px solid color-mix(in srgb,var(--yellow),transparent 44%);border-radius:999px;box-shadow:0 0 0 18px color-mix(in srgb,var(--green),transparent 84%),0 24px 70px color-mix(in srgb,var(--primary),transparent 62%);animation:daily-glow 2.8s ease-in-out infinite}.hero-panel h2{font-size:42px}.hero-panel p{color:var(--muted)}.daily-progress{width:min(420px,100%);height:14px;margin-top:16px;overflow:hidden;border:1px solid color-mix(in srgb,var(--primary),transparent 50%);border-radius:999px;background:color-mix(in srgb,var(--surface),transparent 20%)}.daily-progress span{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--green),var(--blue),var(--yellow));background-size:180% 100%;box-shadow:0 0 18px color-mix(in srgb,var(--green),transparent 58%);animation:progress-shine 1.8s linear infinite}.daily-medal{display:grid;width:108px;aspect-ratio:1;flex:0 0 auto;place-items:center;border:2px solid color-mix(in srgb,var(--yellow),transparent 22%);border-radius:999px;background:radial-gradient(circle at 34% 28%,white,color-mix(in srgb,var(--yellow),white 16%) 28%,var(--yellow) 66%);color:#7c2d12;box-shadow:inset 0 -8px #0000001f,0 20px 34px color-mix(in srgb,var(--yellow),transparent 58%);animation:medal-pop .7s cubic-bezier(.2,1.35,.24,1) both}.daily-medal svg{width:30px;height:30px}.daily-medal strong{margin-top:-16px;font-size:22px;line-height:1}.metric-grid,.deck-grid,.task-strip{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.task-item{display:grid;grid-template-columns:28px minmax(0,1fr);gap:4px 10px;align-items:center;padding:16px;border:1px solid var(--border);border-radius:8px;background:var(--surface);box-shadow:var(--shadow)}.task-item svg{grid-row:span 2;color:var(--primary-strong)}.task-item span{color:var(--muted);font-weight:900}.task-item strong{font-size:20px}.task-item.done{border-color:color-mix(in srgb,var(--green),transparent 35%)}.metric{padding:20px;animation:pop-in .3s cubic-bezier(.22,1.35,.36,1) both}.metric span,.deck-card span,.list-row span,.card-meta span,.hint,.word-card small,.empty-state{color:var(--muted)}.metric strong{display:block;margin-top:8px;font-size:30px}.section-heading{display:flex;align-items:center;justify-content:space-between}.deck-card{display:flex;flex-direction:column;align-items:flex-start;gap:8px;min-height:132px;padding:18px;color:var(--text);text-align:left;animation:slide-up .26s ease both}.deck-card strong{font-size:20px}.deck-icon{display:grid;width:38px;height:38px;place-items:center;border-radius:8px;background:var(--primary-soft);color:var(--primary-strong)}.list,.card-list,.deck-list{display:flex;flex-direction:column;gap:10px}.list-row,.word-card{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:16px;animation:slide-up .24s ease both}.list-row{border-bottom:1px solid var(--border)}.two-column{display:grid;grid-template-columns:minmax(360px,420px) minmax(0,1fr);gap:18px}.deck-workspace.deck-panel-collapsed{grid-template-columns:minmax(0,1fr)}.deck-workspace.deck-panel-collapsed .deck-sidebar-panel{display:none}.panel{min-width:0;padding:18px}.wide-panel{min-width:0}input,select,textarea{width:100%;min-height:44px;padding:10px 12px;border:1px solid var(--border);border-radius:8px;background:var(--surface);color:var(--text);outline:none}input:focus,select:focus,textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px color-mix(in srgb,var(--primary),transparent 78%)}.inline-form{margin:14px 0;align-items:stretch}.deck-list-row{position:relative;display:grid;grid-template-columns:minmax(0,1fr) 42px;gap:8px;align-items:center;animation:slide-up .22s ease both}.deck-list-row.depth-2{padding-left:14px}.deck-list-row.depth-3{padding-left:28px}.deck-list-row.depth-4{padding-left:42px}.deck-list-row.depth-5{padding-left:56px}.deck-list-item{display:grid;grid-template-columns:minmax(0,1fr) 58px;gap:10px;min-width:0;overflow:hidden;justify-content:stretch}.deck-name{display:inline-flex;align-items:center;gap:8px;min-width:0;overflow:hidden}.deck-name i{flex:0 0 auto;width:10px;height:10px;border-left:2px solid var(--blue);border-bottom:2px solid var(--blue)}.deck-name strong{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.deck-count{justify-self:end;min-width:44px;color:var(--muted);font-variant-numeric:tabular-nums;text-align:right;white-space:nowrap}.edit-row{display:flex;align-items:center;gap:6px}.deck-menu{position:relative;display:flex;flex-direction:column;align-items:flex-end;justify-content:flex-end}.deck-menu-popover{position:static;z-index:4;display:grid;min-width:138px;margin-top:6px;overflow:hidden;border:1px solid var(--border);border-radius:8px;background:var(--surface);box-shadow:var(--shadow);animation:pop-in .16s cubic-bezier(.22,1.35,.36,1) both}.deck-menu-popover button{display:flex;align-items:center;gap:8px;min-height:42px;padding:0 12px;border:0;border-bottom:1px solid var(--border);background:var(--surface);color:var(--text);font-weight:900;text-align:left}.deck-menu-popover button:last-child{border-bottom:0}.deck-menu-popover button:hover{background:var(--primary-soft);color:var(--primary-strong)}.deck-menu-popover button.danger{color:var(--red)}.edit-row{grid-column:1 / -1;padding-left:10px}.batch-toolbar,.study-session-controls{display:grid;grid-template-columns:auto minmax(120px,1fr) minmax(160px,220px) auto auto;gap:10px;align-items:center;margin:12px 0;padding:12px;border:1px solid var(--border);border-radius:8px;background:var(--primary-soft)}.batch-toolbar strong{min-width:0;color:var(--primary-strong)}.search{position:relative;width:100%}.search svg{position:absolute;left:12px;top:12px;width:20px;height:20px;color:var(--muted)}.search input{padding-left:42px}.card-form{display:grid;grid-template-columns:repeat(3,minmax(150px,1fr)) auto;gap:10px;margin:14px 0}.edit-card-form{grid-template-columns:repeat(3,minmax(150px,1fr)) auto auto;padding:12px;border:1px solid var(--border);border-radius:8px;background:var(--primary-soft)}.advanced-fields{display:grid;grid-column:1 / -1;grid-template-columns:repeat(2,minmax(160px,1fr));gap:10px;padding:10px;border:1px solid var(--border);border-radius:8px;background:color-mix(in srgb,var(--surface),var(--primary-soft) 36%)}.advanced-fields input:first-child,.advanced-fields .smart-textarea:first-child,.advanced-fields .smart-textarea.expanded:first-child,.card-form .smart-textarea.expanded{grid-column:1 / -1}.smart-textarea{resize:vertical}.smart-textarea.compact{min-height:42px;overflow-y:hidden}.smart-textarea.expanded{min-height:108px}.smart-field{position:relative;display:block;min-width:0}.smart-field.with-image-insert .smart-textarea{padding-right:48px}.smart-image-button{position:absolute;top:5px;right:5px;width:34px;height:34px;background:color-mix(in srgb,var(--surface),var(--primary-soft) 38%)}.smart-image-button svg{width:18px;height:18px}.word-card{align-items:flex-start}.word-title strong{font-size:22px}.phonetic{color:var(--muted);font-weight:800}.type-pill{display:inline-flex;align-items:center;min-height:26px;padding:0 8px;border-radius:8px;background:var(--primary-soft);color:var(--primary-strong);font-size:13px;font-weight:900;white-space:nowrap}.word-card p{margin:8px 0 4px}.card-meta{display:flex;flex-direction:column;align-items:flex-end;gap:8px;min-width:106px}.mode-tabs{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}.mode-tabs button{min-height:44px;border:1px solid var(--border);border-radius:8px;background:var(--surface);color:var(--muted);font-weight:900}.mode-tabs button.active{background:var(--primary);color:#fff;box-shadow:var(--button-shadow)}.study-panel{position:relative;display:grid;grid-template-rows:auto minmax(0,1fr) auto;max-height:calc(100vh - 150px);min-height:min(680px,calc(100vh - 150px));overflow:hidden;padding:22px;animation:study-card-in .22s ease both;--study-face-min: 32px;--study-face-max: 72px;--study-word-min: 38px;--study-word-max: 72px;--study-phonetic-min: 18px;--study-phonetic-max: 28px;--study-back-min: 22px;--study-back-max: 34px;--study-small-size: 16px;--study-question-size: 24px;--study-choice-size: 16px;--study-result-size: 16px;--study-text-align: center;--study-line-height: 1.5;--study-font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;--answer-dock-width: 300px;--answer-dock-gap: clamp(28px, 2.2vw, 40px);font-family:var(--study-font-family)}.study-fixed-top{display:grid;gap:12px;padding:0 2px 12px}.study-scroll{display:grid;min-height:0;overflow:auto;padding:0 2px 12px}.study-panel.entering{animation:study-card-in .22s ease both}.study-panel.leaving{animation:study-card-out .15s ease both}.study-panel.celebrating .question-box,.study-panel.celebrating .flip-card-face{border-color:color-mix(in srgb,var(--green),transparent 36%);box-shadow:inset 0 -7px color-mix(in srgb,var(--green),transparent 70%),0 16px 34px color-mix(in srgb,var(--green),transparent 78%)}.answer-celebration{position:absolute;inset:76px 18px auto;z-index:2;display:grid;place-items:center;min-height:170px;pointer-events:none}.celebration-ring{position:absolute;width:min(260px,62vw);aspect-ratio:1;border:4px solid color-mix(in srgb,var(--green),transparent 32%);border-radius:999px;box-shadow:0 0 0 14px color-mix(in srgb,var(--green),transparent 88%),0 0 44px color-mix(in srgb,var(--green),transparent 55%);animation:celebration-ring .76s ease-out both}.celebration-badge{position:relative;z-index:2;display:inline-flex;align-items:center;gap:8px;min-height:46px;padding:10px 16px;border:2px solid color-mix(in srgb,var(--green),transparent 30%);border-radius:999px;background:var(--green);color:#fff;font-size:18px;font-weight:950;box-shadow:inset 0 -4px #0000001f,0 14px 30px color-mix(in srgb,var(--green),transparent 66%);animation:celebration-badge .78s cubic-bezier(.2,1.4,.24,1) both}.celebration-badge svg{width:22px;height:22px}.answer-celebration i{position:absolute;z-index:1;width:10px;height:18px;border-radius:999px;background:var(--green);box-shadow:0 0 0 4px color-mix(in srgb,var(--green),transparent 82%);opacity:0;transform:translate(0) rotate(0) scale(.6);animation:celebration-burst .82s ease-out both}.answer-celebration i:nth-of-type(1){--tx: -128px;--ty: -54px;--rot: -26deg;background:var(--green)}.answer-celebration i:nth-of-type(2){--tx: -92px;--ty: -104px;--rot: 18deg;background:var(--yellow)}.answer-celebration i:nth-of-type(3){--tx: -30px;--ty: -126px;--rot: -8deg;background:var(--blue)}.answer-celebration i:nth-of-type(4){--tx: 42px;--ty: -120px;--rot: 24deg;background:var(--green)}.answer-celebration i:nth-of-type(5){--tx: 104px;--ty: -88px;--rot: -18deg;background:var(--yellow)}.answer-celebration i:nth-of-type(6){--tx: 134px;--ty: -28px;--rot: 32deg;background:var(--blue)}.answer-celebration i:nth-of-type(7){--tx: 118px;--ty: 42px;--rot: -12deg;background:var(--green)}.answer-celebration i:nth-of-type(8){--tx: 58px;--ty: 86px;--rot: 22deg;background:var(--yellow)}.answer-celebration i:nth-of-type(9){--tx: -8px;--ty: 104px;--rot: -30deg;background:var(--blue)}.answer-celebration i:nth-of-type(10){--tx: -72px;--ty: 76px;--rot: 18deg;background:var(--green)}.answer-celebration i:nth-of-type(11){--tx: -124px;--ty: 30px;--rot: -16deg;background:var(--yellow)}.answer-celebration i:nth-of-type(12){--tx: -146px;--ty: -18px;--rot: 28deg;background:var(--blue)}.rating-celebration{--rating-color: var(--green);position:absolute;inset:82px 18px auto;z-index:4;display:grid;place-items:center;min-height:190px;pointer-events:none}.rating-celebration.fuzzy{--rating-color: var(--yellow)}.rating-celebration.unknown{--rating-color: var(--red)}.rating-celebration-ring{position:absolute;width:min(310px,70vw);aspect-ratio:1;border:4px solid color-mix(in srgb,var(--rating-color),transparent 30%);border-radius:999px;box-shadow:0 0 0 18px color-mix(in srgb,var(--rating-color),transparent 88%),0 0 60px color-mix(in srgb,var(--rating-color),transparent 50%);animation:celebration-ring .82s ease-out both}.rating-celebration-badge{position:relative;z-index:2;display:grid;justify-items:center;gap:5px;min-width:min(360px,calc(100vw - 64px));padding:14px 18px;border:2px solid color-mix(in srgb,var(--rating-color),transparent 28%);border-radius:8px;background:color-mix(in srgb,var(--surface),var(--rating-color) 14%);color:var(--text);box-shadow:inset 0 -5px color-mix(in srgb,var(--rating-color),transparent 72%),0 18px 36px color-mix(in srgb,var(--rating-color),transparent 68%);animation:rating-badge .86s cubic-bezier(.2,1.38,.24,1) both}.rating-celebration-badge svg{width:30px;height:30px;color:var(--rating-color)}.rating-celebration-badge strong{font-size:clamp(22px,4vw,34px);font-weight:950}.rating-celebration-badge small{color:var(--muted);font-size:14px;font-weight:900}.rating-celebration i{position:absolute;z-index:1;width:11px;height:20px;border-radius:999px;background:var(--rating-color);box-shadow:0 0 0 5px color-mix(in srgb,var(--rating-color),transparent 84%);opacity:0;transform:translate(0) rotate(0) scale(.6);animation:celebration-burst .92s ease-out both}.rating-celebration i:nth-of-type(1){--tx: -150px;--ty: -42px;--rot: -28deg}.rating-celebration i:nth-of-type(2){--tx: -124px;--ty: -104px;--rot: 16deg;background:var(--blue)}.rating-celebration i:nth-of-type(3){--tx: -58px;--ty: -132px;--rot: -12deg}.rating-celebration i:nth-of-type(4){--tx: 12px;--ty: -146px;--rot: 24deg;background:var(--yellow)}.rating-celebration i:nth-of-type(5){--tx: 84px;--ty: -124px;--rot: -20deg}.rating-celebration i:nth-of-type(6){--tx: 140px;--ty: -78px;--rot: 30deg;background:var(--blue)}.rating-celebration i:nth-of-type(7){--tx: 164px;--ty: -14px;--rot: -16deg}.rating-celebration i:nth-of-type(8){--tx: 132px;--ty: 58px;--rot: 20deg;background:var(--yellow)}.rating-celebration i:nth-of-type(9){--tx: 72px;--ty: 104px;--rot: -32deg}.rating-celebration i:nth-of-type(10){--tx: 2px;--ty: 124px;--rot: 18deg;background:var(--blue)}.rating-celebration i:nth-of-type(11){--tx: -68px;--ty: 100px;--rot: -18deg}.rating-celebration i:nth-of-type(12){--tx: -126px;--ty: 58px;--rot: 28deg;background:var(--yellow)}.rating-celebration i:nth-of-type(13){--tx: -160px;--ty: 10px;--rot: -10deg}.rating-celebration i:nth-of-type(14){--tx: -140px;--ty: -76px;--rot: 34deg;background:var(--blue)}.study-panel.align-left .flip-card-face,.study-panel.align-left .question-box,.study-panel.align-left .result{text-align:left}.study-panel.align-left .flip-card .word-face,.study-panel.align-left .flip-card .word-back,.study-panel.align-left .flip-card .basic-face,.study-panel.align-left .flip-card .basic-back{justify-items:start}.study-panel.align-left .flip-card .basic-back,.study-panel.align-left .flip-card .basic-answer{text-align:left}.study-panel.align-left .choice-grid{justify-self:center}.study-panel.align-left .choice-grid button{justify-content:flex-start;text-align:left}.streak-heading{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.streak-heading h2{margin:0}.streak-badge{display:inline-flex;align-items:center;gap:7px;min-height:36px;padding:8px 12px;border:1px solid var(--border);border-radius:999px;background:var(--surface-2);color:var(--muted);font-weight:950}.streak-badge.done{border-color:color-mix(in srgb,var(--green),transparent 55%);background:color-mix(in srgb,var(--green),transparent 86%);color:var(--green)}.streak-badge svg{width:18px;height:18px}.progress-line{margin-bottom:18px;font-weight:900;color:var(--muted)}.progress-line div{flex:1;height:12px;overflow:hidden;border-radius:999px;background:var(--surface-2);transform:translateZ(0)}.progress-line i{display:block;width:100%;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--primary),var(--blue));transform:scaleX(var(--progress-ratio, 0));transform-origin:left center;transition:transform .26s cubic-bezier(.22,1,.36,1);will-change:transform}.study-actions{display:flex;align-items:center;justify-content:flex-end;gap:8px;flex-wrap:wrap}.text-tool{position:relative}.text-tool .mini-button.active{border-color:var(--primary);background:var(--primary-soft);color:var(--primary-strong)}.study-actions>.mini-button.active{border-color:var(--primary);background:var(--primary-soft);color:var(--primary-strong)}.study-schedule-pill{border-color:color-mix(in srgb,var(--primary),transparent 58%);background:var(--primary-soft);color:var(--primary-strong)}.text-tool-popover{position:absolute;right:0;top:calc(100% + 8px);z-index:8;display:grid;width:176px;gap:8px;padding:10px;border:1px solid var(--border);border-radius:8px;background:var(--surface);box-shadow:var(--shadow);animation:pop-in .14s cubic-bezier(.22,1.35,.36,1) both}.text-tool-popover.compact{width:152px}.text-tool-popover.font-popover{width:min(320px,86vw);max-height:min(520px,calc(100vh - 160px));overflow:auto}.text-tool-popover.font-popover small{color:var(--muted);font-size:12px;line-height:1.45;text-align:center}.text-tool-popover button{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:38px;padding:8px 10px;border:1px solid var(--border);border-radius:8px;background:var(--surface-2);color:var(--text);font-weight:900}.text-tool-popover button.active{border-color:var(--primary);background:var(--primary);color:#fff;box-shadow:var(--button-shadow)}.text-tool-popover svg{width:17px;height:17px}.study-selector{display:grid;gap:14px;box-shadow:none}.study-session-controls{grid-template-columns:minmax(180px,260px) minmax(160px,220px) minmax(120px,180px) auto;margin:0}.study-remaining{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.study-remaining span{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:8px 10px;border:1px solid var(--border);border-radius:8px;background:var(--surface-2);color:var(--primary-strong);font-weight:900;font-variant-numeric:tabular-nums}.compact-tabs{grid-template-columns:repeat(2,minmax(0,1fr))}.study-edit-form{display:grid;grid-template-columns:repeat(3,minmax(150px,1fr)) auto auto;gap:10px;margin-bottom:14px;padding:12px;border:1px solid var(--border);border-radius:8px;background:var(--primary-soft);animation:slide-up .18s ease both}.flip-card,.question-box{display:grid;width:100%;min-height:300px;place-items:center;padding:28px;border:2px solid var(--border);border-radius:8px;background:var(--surface-2);color:var(--text);text-align:var(--study-text-align);line-height:var(--study-line-height);box-shadow:inset 0 -7px color-mix(in srgb,var(--blue),transparent 72%);transition:background .18s ease,border-color .18s ease,box-shadow .18s ease}.flip-card{align-items:stretch;padding:0;border:0;background:transparent;box-shadow:none;perspective:1200px}.flip-card-inner{position:relative;display:grid;width:100%;min-height:300px;transform-style:preserve-3d;transition:transform .42s cubic-bezier(.22,1,.36,1)}.flip-card.flipped .flip-card-inner{transform:rotateY(180deg)}.flip-card-face{grid-area:1 / 1;display:grid;align-content:center;justify-items:center;width:100%;min-height:300px;padding:28px;border:2px solid var(--border);border-radius:8px;backface-visibility:hidden;background:var(--surface-2);box-shadow:inset 0 -7px color-mix(in srgb,var(--blue),transparent 72%);color:var(--text);text-align:var(--study-text-align);line-height:var(--study-line-height)}.flip-card-back{background:var(--primary-soft);transform:rotateY(180deg)}.flip-card-face>span{width:min(840px,100%);font-size:clamp(var(--study-face-min),8vw,var(--study-face-max));font-weight:950}.flip-card-face>.basic-face,.flip-card-face .basic-face,.flip-card-face .basic-back{font-size:var(--study-question-size)}.flip-card-face>.basic-face,.flip-card-face .basic-face{font-weight:900}.flip-card-face .basic-back{display:grid;gap:18px;justify-items:center;font-weight:400}.flip-card-face .basic-back.two-column-back{width:min(980px,100%)}.flip-card-face .basic-answer{display:block;width:100%;padding-top:18px;border-top:1px solid color-mix(in srgb,var(--border),transparent 20%);font-weight:400}.flip-card-face .basic-answer:first-child{padding-top:0;border-top:0}.flip-card-back .basic-face,.flip-card-face .basic-answer{font-weight:400}.flip-card-face .basic-back.two-column-back .basic-answer{column-count:2;column-gap:clamp(20px,3vw,42px);text-align:left}.flip-card-face .basic-back.two-column-back .basic-answer .markdown-text{display:block}.flip-card-face .basic-back.two-column-back .basic-answer .markdown-text>*{break-inside:avoid;margin-bottom:.78em}.markdown-text{display:grid;gap:.78em;line-height:inherit;white-space:normal;overflow-wrap:anywhere}.markdown-text :is(strong,em,code,a,del){overflow-wrap:anywhere}.markdown-text img{display:block;max-width:100%;max-height:min(420px,52vh);border-radius:8px;object-fit:contain}.markdown-text code{padding:.08em .32em;border:1px solid var(--border);border-radius:6px;background:color-mix(in srgb,var(--surface),var(--primary-soft) 48%);font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.92em}.code-block{position:relative;display:block;width:100%;overflow:hidden;border:1px solid color-mix(in srgb,var(--blue),transparent 55%);border-radius:8px;background:color-mix(in srgb,var(--surface),var(--blue) 7%);text-align:left}.code-block code{display:block;max-width:100%;max-height:min(420px,54vh);overflow:auto;padding:14px;border:0;border-radius:0;background:transparent;color:var(--text);font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,Liberation Mono,monospace;font-size:.88em;line-height:1.65;white-space:pre}.code-language{display:inline-flex;min-height:24px;margin:10px 10px 0;padding:2px 8px;border-radius:999px;background:var(--primary-soft);color:var(--primary-strong);font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:12px;font-weight:900}.math-inline,.math-block{font-weight:inherit}.math-inline{display:inline-block;max-width:100%;vertical-align:baseline;overflow-wrap:anywhere}.math-block{display:block;width:100%;overflow-x:auto;padding:14px 16px;border:1px solid color-mix(in srgb,var(--yellow),transparent 45%);border-radius:8px;background:color-mix(in srgb,var(--yellow),transparent 88%);font-size:1.08em;text-align:center}.math-block .katex-display{margin:0;overflow-x:auto;overflow-y:hidden;white-space:nowrap}.math-inline .katex{white-space:normal}.markdown-text a{color:var(--primary-strong)}.markdown-text ul,.markdown-text ol{display:grid;gap:calc((var(--study-line-height, 1.5) - 1) * .45em);margin:0;padding-left:1.25em;text-align:left}.markdown-text blockquote{display:grid;gap:calc((var(--study-line-height, 1.5) - 1) * .45em);margin:0;padding:.2em 0 .2em .8em;border-left:4px solid color-mix(in srgb,var(--primary),transparent 46%);color:var(--muted);text-align:left}.markdown-divider{width:100%;height:1px;margin:.35em 0;border:0;background:var(--border)}.markdown-heading{display:block;line-height:inherit}.markdown-heading.level-1{font-size:1.22em}.markdown-heading.level-2{font-size:1.14em}.markdown-heading.level-3{font-size:1.08em}.markdown-fragment,.markdown-paragraph,.markdown-line{display:block}.markdown-blank-line{display:block;min-height:calc(var(--blank-lines, 1) * .17em * var(--study-line-height, 1.5))}.markdown-fragment{display:grid;gap:.78em}.markdown-table-wrap{display:block;width:100%;overflow-x:auto}.markdown-table-wrap table{width:100%;min-width:360px;border-collapse:collapse;text-align:left}.markdown-table-wrap th,.markdown-table-wrap td{padding:.45em .55em;border:1px solid var(--border);vertical-align:top}.markdown-table-wrap th{background:var(--primary-soft);color:var(--primary-strong);font-weight:900}.flip-card .word-face,.flip-card .word-back{display:grid;gap:10px;justify-items:center;width:min(720px,100%);font-size:inherit}.labeled-markdown{display:grid;gap:.35em;width:100%;font-weight:400;text-align:inherit}.labeled-markdown-label{color:var(--muted);font-size:.82em;font-weight:500}.flip-card .word-text{font-size:clamp(var(--study-word-min),8vw,var(--study-word-max));font-weight:800;line-height:1}.flip-card .word-face em,.flip-card .word-back em{color:var(--primary-strong);font-size:clamp(var(--study-phonetic-min),3vw,var(--study-phonetic-max));font-style:normal;font-weight:900}.flip-card .word-meaning{font-size:clamp(var(--study-back-min),4vw,var(--study-back-max));font-weight:600}.flip-card .word-back small{max-width:60ch;margin-top:0;font-size:var(--study-small-size);font-weight:400;line-height:1.55}.flip-card small{display:block;margin-top:14px;color:var(--muted)}.question-box{align-content:center;gap:16px}.answer-layout{position:relative;display:grid;grid-template-columns:minmax(0,1fr);gap:var(--answer-dock-gap);align-items:start;width:100%}.answer-layout.with-dock{grid-template-columns:minmax(0,1fr) minmax(240px,var(--answer-dock-width))}.question-dock{position:sticky;top:0;align-self:start;z-index:1;display:grid;grid-template-rows:auto minmax(0,1fr);gap:8px;width:100%;max-width:100%;max-height:100%;overflow:hidden;padding:10px;border:1px solid var(--border);border-radius:8px;background:color-mix(in srgb,var(--surface),var(--primary-soft) 44%);box-shadow:var(--shadow)}.question-dock-resizer{position:absolute;top:0;bottom:0;left:calc((var(--answer-dock-gap) * -1) - 9px);width:calc(var(--answer-dock-gap) + 18px);border:0;border-radius:0;background:transparent;cursor:col-resize;touch-action:none}.question-dock-resizer:after{content:"";position:absolute;top:14px;bottom:14px;left:calc(50% - 2px);width:4px;border-radius:999px;background:color-mix(in srgb,var(--primary),transparent 62%);opacity:0;transition:opacity .14s ease,background .14s ease}.question-dock-resizer:hover:after,.question-dock-resizer:focus-visible:after,body.resizing-answer-dock .question-dock-resizer:after{opacity:1}.question-dock-title{display:flex;align-items:center;justify-content:space-between;gap:10px}.question-dock-title strong{color:var(--primary-strong);font-size:var(--study-small-size)}.question-dock-body{display:grid;align-content:start;gap:8px;min-height:0;overflow:auto;font-size:var(--study-small-size);line-height:var(--study-line-height)}.question-dock-prompt{gap:.72em;font-weight:800}.question-dock-options{display:grid;gap:6px;margin:0;padding:0}.question-dock-options>div{padding:7px 8px;border:1px solid var(--border);border-radius:8px;background:var(--surface)}.question-dock-options>div.correct{border-color:color-mix(in srgb,var(--green),transparent 35%);background:color-mix(in srgb,var(--green),transparent 84%)}.question-dock-options>div.selected:not(.correct){border-color:color-mix(in srgb,var(--red),transparent 35%);background:color-mix(in srgb,var(--red),transparent 86%)}.question-dock-body small{color:var(--muted)}.choice-question.short .question-text,.choice-question.short .question-note{width:min(680px,100%)}.choice-question.medium .question-text,.choice-question.medium .question-note{width:min(860px,100%)}.choice-question.long .question-text,.choice-question.long .question-note{width:min(940px,100%)}.question-box p,.question-text{width:min(840px,100%);margin:0;font-size:var(--study-question-size);font-weight:900;line-height:var(--study-line-height)}.blank-question .question-text{font-weight:500}.question-box small,.question-note{width:min(840px,100%);font-size:var(--study-small-size);color:var(--muted)}.blank-answer-form{display:grid;justify-items:center;width:100%;gap:16px}.blank-question-text{align-items:baseline}.blank-question-text .markdown-line{display:block}.blank-inline-input{width:min(11em,100%);min-width:min(9em,100%);min-height:1.9em;margin:0 .34em;padding:.08em .42em;border:1px solid var(--border);border-radius:6px;outline:0;background:color-mix(in srgb,var(--surface),transparent 8%);color:var(--text);font:inherit;font-weight:400;line-height:1.2;text-align:center;vertical-align:baseline;box-shadow:none;transition:background .14s ease,border-color .14s ease,box-shadow .14s ease}.blank-inline-input::placeholder{color:transparent}.blank-inline-input:focus{background:var(--surface);border-color:var(--blue);box-shadow:0 0 0 3px color-mix(in srgb,var(--blue),transparent 82%)}.blank-inline-input.right{border-color:var(--green);background:color-mix(in srgb,var(--green),transparent 86%)}.blank-inline-input.wrong{border-color:var(--red);background:color-mix(in srgb,var(--red),transparent 88%)}.blank-inline-input.standalone{display:block;width:min(420px,100%);margin:0}.blank-submit-button{min-width:min(180px,100%)}.blank-dock-gap{display:inline-block;width:5.8em;height:1.1em;margin:0 .34em;border-bottom:2px solid currentColor;opacity:.72;vertical-align:baseline}.choice-area{display:grid;width:min(680px,100%);gap:12px}.choice-area.medium{width:min(860px,100%)}.choice-area.long{width:min(940px,100%)}.choice-grid{display:grid;width:100%;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.choice-grid.medium{width:100%}.choice-grid.long{width:100%;grid-template-columns:1fr}.choice-grid button{display:inline-flex;align-items:center;justify-content:center;min-height:60px;padding:12px;border:1px solid var(--border);border-radius:8px;background:var(--surface);color:var(--text);font-size:var(--study-choice-size);font-weight:500;line-height:var(--study-line-height);overflow-wrap:anywhere;white-space:normal;box-shadow:inset 0 -3px color-mix(in srgb,var(--blue),transparent 72%)}.choice-grid button .markdown-text{width:100%}.choice-grid.medium button,.choice-grid.long button{min-height:68px;padding:14px 16px}.choice-grid button.correct{border-color:color-mix(in srgb,var(--green),transparent 35%);background:color-mix(in srgb,var(--green),transparent 82%);color:var(--text);animation:correct-pop .52s cubic-bezier(.2,1.4,.24,1) both;box-shadow:inset 0 -4px color-mix(in srgb,var(--green),transparent 65%),0 12px 22px color-mix(in srgb,var(--green),transparent 76%)}.choice-grid button.wrong{border-color:color-mix(in srgb,var(--red),transparent 35%);background:color-mix(in srgb,var(--red),transparent 84%);color:var(--text);animation:wrong-shake .36s ease both;box-shadow:inset 0 -4px color-mix(in srgb,var(--red),transparent 70%),0 12px 24px color-mix(in srgb,var(--red),transparent 82%)}.rating-row{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));position:sticky;bottom:0;z-index:3;width:100%;flex:0 0 auto;align-self:stretch;gap:10px;margin:12px 0 0;padding:0}.rating-row .rating{width:100%;min-width:0;border-radius:8px}.study-scale-control{display:grid;grid-template-columns:20px minmax(96px,150px) 58px;align-items:center;gap:8px;min-height:34px;padding:0 10px;border:1px solid var(--border);border-radius:8px;background:var(--surface);color:var(--muted);font-size:13px}.study-scale-control input{min-height:0;padding:0}.study-scale-control strong{color:var(--primary-strong);font-variant-numeric:tabular-nums;text-align:right;white-space:nowrap}.study-view.immersive{min-height:calc(100vh - 28px)}.study-view.immersive .study-panel{min-height:calc(100vh - 28px);max-height:calc(100vh - 28px);padding-inline:clamp(14px,2.5vw,36px)}.study-view.immersive .flip-card,.study-view.immersive .flip-card-inner,.study-view.immersive .flip-card-face,.study-view.immersive .question-box{min-height:min(72vh,760px)}.rating.known{background:var(--green)}.rating.fuzzy{background:var(--yellow)}.rating.unknown{background:var(--red)}.listen-button{min-width:220px}.result{display:grid;width:100%;gap:6px;padding:12px;border-radius:8px;color:var(--text);font-size:var(--study-small-size);text-align:var(--study-text-align);line-height:var(--study-line-height)}.result.right{background:color-mix(in srgb,var(--green),transparent 82%);animation:correct-pop .52s cubic-bezier(.2,1.4,.24,1) both;box-shadow:0 12px 24px color-mix(in srgb,var(--green),transparent 80%)}.result.wrong{border:1px solid color-mix(in srgb,var(--red),transparent 38%);background:color-mix(in srgb,var(--red),transparent 82%);animation:wrong-shake .36s ease both;box-shadow:0 12px 28px color-mix(in srgb,var(--red),transparent 80%)}.result span,.result small{overflow-wrap:anywhere}.feedback-block{display:grid;gap:6px;min-width:0;padding:10px;border-radius:8px;background:color-mix(in srgb,var(--surface),transparent 18%);font-size:var(--study-small-size);line-height:var(--study-line-height);text-align:left}.feedback-block>span{color:var(--text);font-size:inherit;font-weight:500}.feedback-block.other{background:color-mix(in srgb,var(--blue),transparent 88%)}.feedback-block .markdown-text{gap:.7em;font-weight:400}.study-complete-panel{position:relative;display:grid;min-height:min(620px,calc(100vh - 220px));place-items:center;overflow:hidden;padding:clamp(28px,6vw,72px) 22px;border:2px solid color-mix(in srgb,var(--green),transparent 40%);border-radius:8px;background:radial-gradient(circle at 50% 28%,color-mix(in srgb,var(--yellow),transparent 70%),transparent 28%),linear-gradient(135deg,color-mix(in srgb,var(--green),transparent 78%),color-mix(in srgb,var(--blue),transparent 82%)),var(--surface);text-align:center;box-shadow:var(--shadow);animation:finish-panel-in .48s cubic-bezier(.2,1.35,.24,1) both}.study-complete-panel>*:not(.finish-burst){position:relative;z-index:2}.study-complete-panel h2{margin:0;color:color-mix(in srgb,var(--green),var(--primary) 36%);font-size:clamp(56px,12vw,112px);line-height:1;text-shadow:0 8px 28px color-mix(in srgb,var(--yellow),transparent 48%)}.study-complete-panel p{max-width:34rem;margin:0;color:var(--muted);font-weight:900}.study-complete-panel .primary-button{margin-top:18px}.study-complete-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-top:18px}.study-complete-actions .primary-button{margin-top:0}.finish-burst{position:absolute;top:0;right:0;bottom:0;left:0;display:grid;place-items:center;pointer-events:none}.finish-medal{display:grid;width:clamp(74px,12vw,116px);aspect-ratio:1;place-items:center;border:3px solid color-mix(in srgb,var(--yellow),transparent 24%);border-radius:999px;background:radial-gradient(circle at 34% 24%,white,color-mix(in srgb,var(--yellow),white 10%) 28%,var(--yellow) 68%);color:#854d0e;box-shadow:inset 0 -9px #0000001f,0 20px 42px color-mix(in srgb,var(--yellow),transparent 48%);animation:medal-pop .76s cubic-bezier(.2,1.35,.24,1) .18s both}.finish-medal svg{width:46%;height:46%}.finish-orbit{width:min(420px,82vw);aspect-ratio:1;border:4px solid color-mix(in srgb,var(--green),transparent 34%);border-radius:999px;box-shadow:0 0 0 20px color-mix(in srgb,var(--yellow),transparent 88%),0 0 70px color-mix(in srgb,var(--blue),transparent 58%);animation:finish-orbit 1.2s ease-out both}.finish-burst i{position:absolute;width:12px;height:26px;border-radius:999px;opacity:0;background:var(--primary);animation:finish-spark 1.3s ease-out both}.finish-burst i:nth-of-type(3n+1){background:var(--green)}.finish-burst i:nth-of-type(3n+2){background:var(--blue)}.finish-burst i:nth-of-type(3n+3){background:var(--yellow)}.finish-burst i:nth-of-type(1){--tx: -210px;--ty: -92px;--rot: -24deg;animation-delay:40ms}.finish-burst i:nth-of-type(2){--tx: -158px;--ty: -172px;--rot: 18deg;animation-delay:70ms}.finish-burst i:nth-of-type(3){--tx: -70px;--ty: -214px;--rot: -8deg;animation-delay:30ms}.finish-burst i:nth-of-type(4){--tx: 38px;--ty: -220px;--rot: 26deg;animation-delay:90ms}.finish-burst i:nth-of-type(5){--tx: 142px;--ty: -168px;--rot: -18deg;animation-delay:20ms}.finish-burst i:nth-of-type(6){--tx: 212px;--ty: -82px;--rot: 32deg;animation-delay:60ms}.finish-burst i:nth-of-type(7){--tx: 220px;--ty: 34px;--rot: -12deg;animation-delay:.12s}.finish-burst i:nth-of-type(8){--tx: 160px;--ty: 132px;--rot: 22deg;animation-delay:80ms}.finish-burst i:nth-of-type(9){--tx: 64px;--ty: 190px;--rot: -30deg;animation-delay:.11s}.finish-burst i:nth-of-type(10){--tx: -52px;--ty: 202px;--rot: 18deg;animation-delay:10ms}.finish-burst i:nth-of-type(11){--tx: -152px;--ty: 140px;--rot: -16deg;animation-delay:90ms}.finish-burst i:nth-of-type(12){--tx: -220px;--ty: 48px;--rot: 28deg;animation-delay:50ms}.finish-burst i:nth-of-type(n+13){--tx: 0;--ty: -240px;--rot: 45deg;transform-origin:center}.finish-burst i:nth-of-type(13){rotate:0deg}.finish-burst i:nth-of-type(14){rotate:45deg}.finish-burst i:nth-of-type(15){rotate:90deg}.finish-burst i:nth-of-type(16){rotate:135deg}.finish-burst i:nth-of-type(17){rotate:180deg}.finish-burst i:nth-of-type(18){rotate:225deg}.range-row{display:grid;grid-template-columns:minmax(0,1fr) 64px;gap:12px;align-items:center}.range-row input{padding:0}.range-row strong{color:var(--primary-strong);font-variant-numeric:tabular-nums;text-align:right}.import-form,.settings-panel{display:grid;gap:16px}.template-links,.settings-actions{display:flex;flex-wrap:wrap;gap:10px}.template-links a{display:inline-flex;align-items:center;min-height:38px;padding:0 12px;border:1px solid var(--border);border-radius:8px;background:var(--primary-soft);color:var(--primary-strong);font-weight:900;text-decoration:none}label{display:grid;gap:8px;font-weight:900}textarea{resize:vertical}.schedule-box{padding:16px;border:1px solid var(--border);border-radius:8px;background:var(--primary-soft)}.schedule-box h3,.schedule-box p{margin:0}.schedule-box p{margin-top:8px;color:var(--muted)}.changelog-box{display:grid;gap:12px}.changelog-row{display:grid;grid-template-columns:90px 120px minmax(0,1fr);gap:10px;align-items:baseline;padding-top:12px;border-top:1px solid var(--border)}.changelog-row span,.changelog-row p{color:var(--muted)}.changelog-row p{margin-top:0}.empty-state{padding:22px;border:1px dashed var(--border);border-radius:8px;background:color-mix(in srgb,var(--surface),transparent 15%);text-align:center}.toast{position:fixed;right:22px;bottom:22px;z-index:10;max-width:min(360px,calc(100vw - 44px));padding:14px 16px;border:0;border-radius:8px;background:var(--text);color:var(--surface);font-weight:900;box-shadow:var(--shadow);animation:toast-in .24s cubic-bezier(.22,1.35,.36,1) both}.toast.error{background:var(--red);color:#fff}.rating-toast{--rating-color: var(--green);position:absolute;right:var(--rating-toast-right, 28px);bottom:var(--rating-toast-bottom, 90px);z-index:12;display:grid;grid-template-columns:36px minmax(0,1fr);align-items:center;gap:10px;max-width:min(420px,var(--rating-toast-max-width, calc(100% - 44px) ));padding:13px 15px;border:1px solid color-mix(in srgb,var(--rating-color),transparent 45%);border-radius:8px;background:color-mix(in srgb,var(--surface),var(--rating-color) 12%);color:var(--text);text-align:left;box-shadow:inset 0 -4px color-mix(in srgb,var(--rating-color),transparent 76%),0 18px 36px color-mix(in srgb,var(--rating-color),transparent 74%),var(--shadow);animation:toast-in .24s cubic-bezier(.22,1.35,.36,1) both}.rating-toast.fuzzy{--rating-color: var(--yellow)}.rating-toast.unknown{--rating-color: var(--red)}.rating-toast svg{width:32px;height:32px;color:var(--rating-color)}.rating-toast span{display:grid;min-width:0;gap:2px}.rating-toast strong{font-size:15px;font-weight:950}.rating-toast small{color:var(--muted);font-size:13px;font-weight:850;line-height:1.35}.auth-shell{display:grid;min-height:100vh;align-content:center;justify-items:center;gap:18px;padding:22px;background:linear-gradient(135deg,color-mix(in srgb,var(--primary),transparent 86%),transparent 42%),var(--bg)}.auth-panel{width:min(440px,100%);padding:26px;border:1px solid var(--border);border-radius:8px;background:var(--surface);box-shadow:var(--shadow);animation:pop-in .26s cubic-bezier(.22,1.35,.36,1) both}.auth-brand{margin-bottom:22px}.auth-panel h1{margin:0 0 18px;font-size:32px}.auth-form{display:grid;gap:14px}.auth-error{margin:0;padding:10px 12px;border-radius:8px;background:color-mix(in srgb,var(--red),transparent 84%);color:var(--red);font-weight:900}.text-button{margin-top:14px;min-height:38px;border:0;background:transparent;color:var(--primary-strong);font-weight:900}.about-panel{display:grid;gap:16px}.about-title,.modal-title{display:flex;align-items:center;justify-content:space-between;gap:12px}.about-title>svg{width:42px;height:42px;color:var(--primary-strong)}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:30;display:grid;place-items:center;padding:18px;background:#00000057}.modal-panel{width:min(760px,100%);max-height:min(760px,calc(100vh - 36px));overflow:auto;padding:20px;border:1px solid var(--border);border-radius:8px;background:var(--surface);box-shadow:var(--shadow);animation:pop-in .18s cubic-bezier(.22,1.35,.36,1) both}.modal-title h2{display:inline-flex;align-items:center;gap:8px;margin:0}.detail-grid,.conflict-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.detail-item,.conflict-grid>div{display:grid;gap:6px;min-width:0;padding:12px;border:1px solid var(--border);border-radius:8px;background:var(--primary-soft)}.detail-item span,.conflict-grid small{color:var(--muted);font-weight:800}.detail-item strong,.conflict-grid p{margin:0;overflow-wrap:anywhere}.conflict-grid h3{margin:0}@keyframes pop-in{0%{opacity:0;transform:translateY(12px) scale(.96)}to{opacity:1;transform:translateY(0) scale(1)}}@keyframes slide-up{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@keyframes daily-glow{0%,to{transform:translateY(0) scale(1)}50%{transform:translateY(8px) scale(1.04)}}@keyframes medal-pop{0%{opacity:0;transform:translateY(18px) scale(.72) rotate(-7deg)}62%{opacity:1;transform:translateY(-4px) scale(1.08) rotate(2deg)}to{opacity:1;transform:translateY(0) scale(1) rotate(0)}}@keyframes study-card-in{0%{opacity:0;transform:translateY(10px) scale(.985)}to{opacity:1;transform:translateY(0) scale(1)}}@keyframes study-card-out{0%{opacity:1;transform:translateY(0) scale(1)}to{opacity:0;transform:translateY(-8px) scale(.985)}}@keyframes celebration-ring{0%{opacity:0;transform:scale(.35)}18%{opacity:1}to{opacity:0;transform:scale(1.3)}}@keyframes celebration-badge{0%{opacity:0;transform:translateY(10px) scale(.72) rotate(-3deg)}38%{opacity:1;transform:translateY(-3px) scale(1.12) rotate(1deg)}68%{opacity:1;transform:translateY(0) scale(.98) rotate(0)}to{opacity:0;transform:translateY(-8px) scale(1.02)}}@keyframes rating-badge{0%{opacity:0;transform:translateY(12px) scale(.72) rotate(-2deg)}34%{opacity:1;transform:translateY(-6px) scale(1.08) rotate(1deg)}66%{opacity:1;transform:translateY(0) scale(1) rotate(0)}to{opacity:0;transform:translateY(-10px) scale(1.03)}}@keyframes celebration-burst{0%{opacity:0;transform:translate(0) rotate(0) scale(.45)}18%{opacity:1}to{opacity:0;transform:translate(var(--tx),var(--ty)) rotate(var(--rot)) scale(1)}}@keyframes correct-pop{0%{transform:scale(.98)}45%{transform:scale(1.045)}to{transform:scale(1)}}@keyframes wrong-shake{0%,to{transform:translate(0)}24%{transform:translate(-4px)}48%{transform:translate(4px)}72%{transform:translate(-2px)}}@keyframes finish-panel-in{0%{opacity:0;transform:translateY(18px) scale(.97)}to{opacity:1;transform:translateY(0) scale(1)}}@keyframes finish-orbit{0%{opacity:0;transform:scale(.34) rotate(0)}34%{opacity:1}to{opacity:.72;transform:scale(1.08) rotate(80deg)}}@keyframes finish-spark{0%{opacity:0;transform:translate(0) rotate(0) scale(.4)}20%{opacity:1}to{opacity:0;transform:translate(var(--tx),var(--ty)) rotate(var(--rot)) scale(1)}}@keyframes bob{0%,to{transform:translateY(0)}50%{transform:translateY(-3px)}}@keyframes progress-shine{to{background-position:180% 0}}@keyframes spin{to{transform:rotate(360deg)}}@keyframes toast-in{0%{opacity:0;transform:translateY(12px) scale(.96)}to{opacity:1;transform:translateY(0) scale(1)}}@media(max-width:900px){.app-shell{grid-template-columns:1fr}.sidebar{position:fixed;z-index:5;right:0;bottom:0;left:0;flex-direction:row;height:auto;padding:8px;border-top:1px solid var(--border);border-right:0;overflow-x:auto}.brand{display:none}.user-pill{flex:0 0 54px;justify-content:center;min-height:54px;margin:0;padding:8px}.user-pill span{display:none}.nav-button{flex:1 0 72px;justify-content:center;min-height:54px;padding:8px}.nav-button span{display:none}.main{padding:18px 18px calc(86px + env(safe-area-inset-bottom));width:100%}.topbar h1{font-size:28px}.hero-panel,.list-row,.word-card{align-items:stretch;flex-direction:column}.hero-panel h2{font-size:34px}.metric-grid,.deck-grid,.task-strip,.two-column,.card-form,.advanced-fields,.study-edit-form,.batch-toolbar,.study-session-controls,.changelog-row,.deck-workspace.deck-panel-collapsed{grid-template-columns:1fr}.mode-tabs{grid-template-columns:repeat(3,minmax(0,1fr))}.detail-grid,.conflict-grid{grid-template-columns:1fr}.answer-layout.with-dock{grid-template-columns:1fr;padding-right:0}.study-panel{max-height:calc(100vh - 126px);min-height:min(650px,calc(100vh - 126px))}.question-dock{position:static;width:100%;max-height:none}.question-dock-resizer{display:none}.card-meta{align-items:flex-start}}@media(max-width:520px){.main{padding:10px 10px calc(90px + env(safe-area-inset-bottom))}.topbar{align-items:flex-start;flex-direction:column;gap:12px}.top-actions{width:100%;flex-wrap:wrap;justify-content:flex-start}.panel,.wide-panel,.study-panel{min-width:0}.inline-form,.toolbar,.word-title{flex-wrap:wrap}.mode-tabs,.compact-tabs{grid-template-columns:1fr 1fr}.study-panel{max-height:calc(100vh - 112px);min-height:calc(100vh - 112px);padding:14px}.study-scroll{padding-bottom:10px}.study-panel .progress-line{gap:7px}.study-actions{justify-content:center;gap:6px}.text-tool-popover{position:fixed;right:10px;left:auto;top:auto;bottom:calc(78px + env(safe-area-inset-bottom));max-width:calc(100vw - 20px)}.choice-grid,.choice-grid.long{grid-template-columns:1fr}.choice-area,.choice-area.medium,.choice-area.long,.answer-layout,.answer-layout.with-dock,.question-dock,.question-box p,.question-text,.choice-question.short .question-text,.choice-question.medium .question-text,.choice-question.long .question-text,.choice-question.short .question-note,.choice-question.medium .question-note,.choice-question.long .question-note{width:100%;max-width:100%}.code-block code{font-size:.82em;white-space:pre-wrap}.rating-row{bottom:0;width:100%;margin-right:0;margin-left:0;gap:8px}.rating-toast{right:var(--rating-toast-right, 18px);bottom:var(--rating-toast-bottom, 82px);max-width:min(100%,var(--rating-toast-max-width, calc(100% - 36px) ))}.detail-grid,.conflict-grid,.task-strip{grid-template-columns:1fr}.sync-button span{display:none}.flip-card,.question-box{min-height:230px;padding:16px}.flip-card{padding:0}.flip-card-inner,.flip-card-face{min-height:230px}.flip-card-face{padding:16px}.flip-card-face .basic-back.two-column-back .basic-answer{column-count:1;text-align:var(--study-text-align)}.rating{min-height:50px;padding:0 8px;font-size:13px}.rating svg{width:17px;height:17px}.study-remaining{grid-template-columns:1fr 1fr}.study-session-controls{grid-template-columns:1fr}.text-tool-popover.font-popover{max-height:min(420px,calc(100vh - 140px))}.question-dock{overflow:visible;padding:10px}.result{text-align:left}.code-block{max-width:100%}.math-block{padding:12px;text-align:left}.choice-grid button{justify-content:flex-start;min-height:54px;text-align:left}.study-complete-panel{min-height:min(520px,calc(100vh - 150px));padding:28px 16px}}
