:root{color-scheme:light;--bg: #f5f5f4;--panel: #ffffff;--card: #ffffff;--chip: #f3f4f6;--muted: #6b7280;--text: #111827;--accent: #34d399;--accent-contrast: #ffffff;--accent-2: #34d399;--accent-surface: rgba(52, 211, 153, .12);--danger: #dc2626;--warn: #d97706;--ok: #34d399;--border: #e5e7eb}:root[data-theme=dark]{color-scheme:dark;--bg: #111113;--panel: #18191c;--card: #1f2023;--chip: #2b2c30;--muted: #9ca3af;--text: #f9fafb;--accent: #34d399;--accent-contrast: #f9fafb;--accent-2: #34d399;--accent-surface: rgba(52, 211, 153, .18);--danger: #fca5a5;--warn: #fbbf24;--ok: #34d399;--border: rgba(255, 255, 255, .12)}*,*:before,*:after{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;min-height:100dvh;display:flex;justify-content:center;padding:clamp(20px,4vw,48px)}#root{flex:1;display:flex}button,input,textarea,select{font:inherit;color:inherit}button{cursor:pointer}.app-shell{flex:1;width:100%;max-width:1400px;margin:0 auto;display:flex;flex-direction:column;gap:24px}.app-header{display:flex;align-items:center;justify-content:space-between;gap:16px;background:var(--panel);padding:clamp(16px,3vw,20px) clamp(18px,3vw,24px);border-radius:20px;border:1px solid var(--border)}.title{font-weight:700;letter-spacing:.3px;margin:0;font-size:clamp(1.2rem,3vw,1.5rem);white-space:nowrap}.subtitle{color:var(--muted);font-size:.95rem;margin-top:4px;max-width:680px;line-height:1.5}button{border:1px solid transparent;border-radius:12px;padding:8px 12px;background:transparent;color:inherit;font:inherit;cursor:pointer;transition:color .16s ease,background .16s ease,border .16s ease,transform .12s ease}button:hover{color:var(--text)}button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.button{border-radius:12px;padding:10px 16px;background:transparent;color:var(--accent);border:1px solid var(--accent);font-weight:600;letter-spacing:.02em}.button:hover{background:var(--accent-surface)}.button.compact{padding:6px 12px;font-size:.9rem;border-radius:10px}.button.secondary{background:var(--card);color:var(--text);border-color:var(--border)}.button.secondary:hover{background:var(--chip)}.button.ghost{background:transparent;border-color:var(--border);color:var(--muted)}.button.ghost:hover{background:var(--chip);color:var(--text)}.button.ok{background:var(--ok);border-color:var(--ok);color:#0a1f17}.button.ok:hover{background:#3fe0a5;border-color:#3fe0a5}.button.danger{background:var(--danger);border-color:var(--danger);color:#2d0707}.button.danger:hover{background:#fb8f8f;border-color:#fb8f8f}.pill{display:inline-flex;align-items:center;gap:4px;padding:4px 10px;border-radius:999px;background:var(--chip);font-size:.8rem}.toolbar{display:flex;gap:10px;align-items:center}.header-actions{display:flex;flex-wrap:wrap;gap:10px;justify-content:flex-end;align-items:center}.header-actions--desktop{width:100%}.header-menu{position:relative;display:none;margin-left:auto}.header-menu__trigger{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-width:120px}.header-menu__dropdown{position:absolute;top:calc(100% + 8px);right:0;min-width:200px;display:flex;flex-direction:column;gap:8px;padding:12px;border-radius:16px;background:var(--panel);border:1px solid var(--border);box-shadow:0 18px 40px #00000047;opacity:0;pointer-events:none;transform:translateY(-6px);transition:opacity .14s ease,transform .14s ease;z-index:20}.header-menu__dropdown.is-open{opacity:1;pointer-events:auto;transform:translateY(0)}.header-menu__dropdown .button{justify-content:flex-start;width:100%}@media (min-width: 768px){.title{font-size:clamp(1.3rem,2.2vw,1.6rem)}}@media (max-width: 700px){body{padding:14px;justify-content:flex-start}.app-shell{gap:16px}.app-header{flex-direction:column;align-items:flex-start;gap:10px;padding:12px 16px;border-radius:16px}.title{font-size:1.1rem;white-space:normal}.header-actions--desktop{display:none}.header-menu{display:flex;width:100%;flex-direction:column;gap:8px}.header-menu__trigger{width:100%}.header-menu__dropdown{position:static;min-width:100%;box-shadow:none;border-radius:12px;padding:8px;opacity:1;pointer-events:auto;transform:none;display:none;background:var(--card)}.header-menu__dropdown.is-open{display:flex}.header-menu__dropdown .button{justify-content:center}.workspace{padding:16px;border-radius:18px;gap:16px}.workspace-panels{gap:16px}.tabbar button{padding:6px 10px}.edit-header{padding:12px;border-radius:16px}.card{padding:12px}}.workspace{width:100%;display:flex;flex-direction:column;gap:24px;background:var(--panel);border-radius:24px;padding:clamp(20px,4vw,28px);border:1px solid var(--border)}.workspace-panels{display:flex;flex-direction:column;gap:20px;width:100%}.muted{color:var(--muted)}.small{font-size:.85rem}.stack{display:flex;flex-direction:column;gap:12px}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:12px}.card{background:var(--card);border-radius:14px;padding:14px;display:flex;flex-direction:column;gap:12px}.inline{display:flex;gap:8px;align-items:center}input:not([type=checkbox]):not([type=radio]),textarea,select{background:var(--card);color:var(--text);border-radius:10px;border:1px solid var(--border);padding:10px 12px;width:100%}input[type=range]{--range-progress: 0%;width:100%;height:4px;border-radius:999px;background:linear-gradient(var(--accent),var(--accent)) 0 0 / var(--range-progress) 100% no-repeat,linear-gradient(var(--border),var(--border)) 0 0 / 100% 100% no-repeat;cursor:pointer;-webkit-appearance:none;-moz-appearance:none;appearance:none}input[type=range]::-webkit-slider-runnable-track{height:4px;border-radius:inherit;background:transparent}input[type=range]::-moz-range-track{height:4px;border-radius:inherit;background:transparent}input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:18px;height:18px;border-radius:50%;background:var(--panel);border:2px solid var(--accent);box-shadow:0 0 0 2px var(--panel);transition:transform .14s ease}input[type=range]::-moz-range-thumb{width:18px;height:18px;border-radius:50%;background:var(--panel);border:2px solid var(--accent);box-shadow:0 0 0 2px var(--panel);transition:transform .14s ease}input[type=range]:active::-webkit-slider-thumb,input[type=range]:active::-moz-range-thumb{transform:scale(1.05)}textarea{resize:vertical;min-height:110px}.tabbar{display:flex;flex-wrap:wrap;gap:6px;padding:4px;border-radius:12px;border:1px solid var(--border);background:transparent;overflow-x:auto;overscroll-behavior-x:contain;scrollbar-width:none}.tabbar::-webkit-scrollbar{display:none}.tabbar button{background:transparent;color:var(--muted);border-radius:10px;padding:8px 14px;border-color:var(--border);font-weight:600}.tabbar button.active{background:var(--accent-surface);color:var(--accent);border-color:var(--accent)}.tabbar button:hover{border-color:var(--accent);color:var(--accent)}.tab-panel{display:none}.tab-panel.active{display:flex;flex-direction:column;gap:20px}.edit-tab{gap:24px}.edit-header{display:flex;flex-direction:column;gap:16px;padding:16px;background:var(--card);border-radius:20px;border:1px solid var(--border)}.edit-header__field{display:flex;flex-direction:column;gap:8px}.edit-label{font-size:.85rem;font-weight:600;letter-spacing:.2px;color:var(--muted)}.edit-header__actions{display:flex;flex-wrap:wrap;gap:10px;align-items:center}.menu{position:relative}.menu__panel{position:absolute;top:calc(100% + 8px);right:0;display:flex;flex-direction:column;gap:4px;min-width:190px;background:var(--card);border-radius:12px;border:1px solid var(--border);padding:8px;z-index:10}.menu__panel button{background:none;border:none;color:inherit;text-align:left;padding:8px 10px;border-radius:8px;font-weight:500}.menu__panel button:hover{background:var(--chip);color:var(--text)}.edit-toolbar{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;padding:0 4px}.edit-toolbar__buttons{display:flex;flex-wrap:wrap;gap:8px}.edit-rows{display:flex;flex-direction:column;gap:14px;padding-bottom:12px}.edit-row{background:var(--card);border-radius:20px;border:1px solid var(--border);padding:16px;display:flex;flex-direction:column;gap:12px}.edit-row__grid{display:grid;gap:12px}.edit-field{display:flex;flex-direction:column;gap:8px}.edit-row__remove{align-self:flex-end;padding:6px 12px}@media (min-width: 720px){.edit-header{flex-direction:row;align-items:flex-end;justify-content:space-between}.edit-header__field{flex:1}.edit-header__actions{align-self:flex-start}.edit-row__grid{grid-template-columns:repeat(2,minmax(0,1fr))}}.quick-import{gap:12px}.quick-import textarea{min-height:160px}.quick-import__actions{display:flex;flex-wrap:wrap;gap:8px;justify-content:flex-end}.quick-import__hint{line-height:1.5}.library{gap:16px}.library-header{display:flex;align-items:flex-start;justify-content:space-between;gap:16px}.library-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:12px}.library-item{display:flex;flex-direction:column;gap:12px;padding:14px;border-radius:14px;background:var(--card);border:1px solid var(--border)}.library-item.is-active{outline:2px solid var(--accent);outline-offset:0}.library-item__primary{display:flex;align-items:baseline;justify-content:space-between;gap:16px;background:none;border:none;color:inherit;padding:0;text-align:left;font:inherit;cursor:pointer}.library-item__primary:hover{text-decoration:underline}.library-item__title{font-weight:600}.library-item__meta{font-size:.85rem;color:var(--muted)}.library-item__actions{display:flex;flex-wrap:wrap;gap:8px}.library-item__actions .button{padding:6px 12px}.chip{display:inline-flex;align-items:center;gap:6px;padding:8px 12px;background:var(--chip);border-radius:999px}.slot{border:2px dashed var(--border);border-radius:12px;padding:12px;min-height:58px;display:flex;align-items:center;justify-content:space-between;gap:12px;transition:border .12s ease,background .12s ease}.slot.filled{border-style:solid;background:#f973161f}.slot.correct{outline:2px solid var(--ok)}.slot.incorrect{outline:2px solid var(--danger)}.match-columns{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}.notice{background:#ffffff14;border-radius:12px;padding:12px;font-size:.9rem}.flash-wrap{display:grid;gap:20px;justify-items:center;width:min(520px,100%);margin:0 auto}.flash-options{width:min(520px,100%);margin:0 auto;gap:16px}.flash-options__row{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;width:100%}.flash-options__row>span{margin-left:auto}.flash-options__actions{display:flex;flex-wrap:wrap;gap:8px;width:100%}.flash-options__actions .button{flex:1 1 160px;width:100%}.flash-toggles{display:flex;flex:1 1 100%;flex-wrap:wrap;gap:12px}.flash-toggles .toggle{flex:1 1 220px}.flash-queue-count{flex:0 0 auto;margin-left:auto;white-space:nowrap}.toggle{position:relative;display:flex;align-items:center;gap:16px;padding:12px 16px;border-radius:14px;border:1px solid var(--border);background:var(--chip);cursor:pointer;transition:border-color .16s ease,background .16s ease,opacity .16s ease;width:100%}.toggle:hover{border-color:var(--accent);background:var(--accent-surface)}.toggle__label{flex:1 1 auto;font-weight:600}.toggle input{position:absolute;opacity:0;pointer-events:none}.toggle__track{position:relative;flex:0 0 auto;width:46px;height:26px;border-radius:999px;background:var(--border);display:flex;align-items:center;padding:3px;transition:background .16s ease,box-shadow .16s ease;box-shadow:inset 0 0 0 1px #0000001f}.toggle__thumb{width:20px;height:20px;border-radius:50%;background:var(--card);box-shadow:0 2px 4px #00000040;transition:transform .16s ease,background .16s ease,box-shadow .16s ease}.toggle input:checked+.toggle__track{background:var(--accent);box-shadow:inset 0 0 0 1px #00000014}.toggle input:checked+.toggle__track .toggle__thumb{transform:translate(20px);background:#fff;box-shadow:0 2px 6px #00000040}.toggle input:focus-visible+.toggle__track{box-shadow:0 0 0 2px #fff6,0 0 0 4px #1890ff73}.toggle input:disabled+.toggle__track{background:#ffffff1f;box-shadow:inset 0 0 0 1px #00000014}.toggle input:disabled~.toggle__label{color:var(--muted)}.toggle[data-disabled=true]{cursor:not-allowed;opacity:.65}.toggle[data-disabled=true]:hover{border-color:var(--border);background:var(--chip)}.flash-card{background:var(--card);border-radius:18px;padding:clamp(24px,4vw,40px);display:flex;flex-direction:column;align-items:center;justify-content:center;aspect-ratio:3 / 2;width:100%;text-align:center;cursor:pointer;border:1px solid var(--border);transition:border-color .16s ease,background .16s ease;touch-action:pan-x}.flash-card:hover{border-color:var(--accent);background:var(--chip)}.flash-card:focus-visible{border-color:var(--accent);outline:none}.flash-term{font-size:clamp(1.4rem,2.5vw,1.8rem);font-weight:700}.flash-def{margin-top:14px;color:var(--muted);font-size:clamp(1rem,2vw,1.1rem);line-height:1.6}.center{display:grid;place-items:center}.sheet{position:fixed;top:0;right:0;bottom:0;left:0;display:flex;justify-content:flex-end;z-index:1200}.sheet__backdrop{position:absolute;top:0;right:0;bottom:0;left:0;background:#11111173}.sheet__panel{position:relative;height:100%;width:min(420px,100%);max-width:420px;background:var(--card);padding:24px;border-top-left-radius:24px;border-bottom-left-radius:24px;display:flex;flex-direction:column;gap:16px;overflow-y:auto;border:1px solid var(--border)}.sheet__header{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}.sheet__title{margin:0;font-size:1.25rem}.sheet__content{display:flex;flex-direction:column;gap:20px}@media (max-width: 640px){.sheet{justify-content:center}.sheet__panel{width:100%;border-radius:0}}.toast-container{position:fixed;inset:auto 20px 20px auto;display:flex;flex-direction:column;gap:10px;z-index:1000}.toast{background:var(--accent);color:var(--accent-contrast);padding:10px 14px;border-radius:10px;border:none}.footer{font-size:.85rem;color:var(--muted)}.kbd{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;background:#ffffff14;border-radius:6px;padding:2px 6px}.question-card{display:flex;flex-direction:column;gap:16px}.options{display:grid;gap:10px}.options label{display:grid;grid-template-columns:auto 1fr;gap:10px;align-items:center;padding:10px 12px;border-radius:12px;background:#ffffff0a;border:1px solid transparent}.options label.correct{border-color:var(--ok);background:#3ddc971a}.options label.incorrect{border-color:var(--danger);background:#ff6b6b1f}.options input[type=radio]{accent-color:var(--accent)}.flash-controls{display:grid;width:100%;gap:12px;grid-template-columns:repeat(auto-fit,minmax(180px,1fr))}.flash-controls .button{width:100%}@media (max-width: 560px){.flash-card{padding:clamp(20px,6vw,28px);border-radius:16px;aspect-ratio:auto;min-height:220px}.flash-term{font-size:clamp(1.2rem,4.5vw,1.6rem)}.flash-def{font-size:clamp(.95rem,4vw,1.05rem)}.flash-options__row{justify-content:flex-start}.flash-options__row>span{margin-left:0}}@media (max-width: 480px){.flash-wrap{gap:16px}.flash-controls{grid-template-columns:1fr}.flash-options__row{flex-direction:column;align-items:stretch}.flash-options__row>span{align-self:flex-start}.flash-options__actions,.flash-toggles{flex-direction:column}.flash-toggles .toggle{flex-basis:100%}.flash-queue-count{width:100%;margin-top:4px}}.hidden{display:none!important}.empty-state{color:var(--muted);font-size:.95rem}.tab-actions{display:flex;gap:8px;flex-wrap:wrap}.stretch{flex:1}.tab-summary{display:flex;align-items:center;justify-content:space-between;gap:12px}.tab-summary strong{font-weight:600}.tab-summary small{color:var(--muted)}.footer-link{color:inherit;text-decoration:underline}.card.tight{gap:8px}@media (max-width: 960px){.app{grid-template-columns:1fr}header{position:sticky;top:0;z-index:10}.side{order:2}.main{order:1}}@media (max-width: 640px){.row{grid-template-columns:1fr}.tab-summary{flex-direction:column;align-items:flex-start}}button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:2px solid var(--accent);outline-offset:2px}