:root{color:#1b1d22;font-synthesis:none;text-rendering:optimizelegibility;-webkit-tap-highlight-color:transparent;background:#e9eae7;font-family:Tahoma,Segoe UI,Arial,sans-serif}*{box-sizing:border-box}html,body,#root{min-width:320px;min-height:100%;margin:0}body{overscroll-behavior:none;background:#e9eae7;min-height:100svh}button,a{font:inherit}button{-webkit-tap-highlight-color:transparent}button:focus-visible,a:focus-visible{outline-offset:2px;outline:3px solid #85a0ff}.app-shell{background:#f7f7f5;grid-template-rows:auto minmax(0,1fr);width:min(100%,520px);height:100svh;margin:0 auto;display:grid;overflow:hidden}.topbar{padding:max(8px, env(safe-area-inset-top)) 12px 10px}.topbar-row{grid-template-columns:48px minmax(0,1fr) 48px;align-items:center;column-gap:4px;min-height:44px;display:grid}.topbar h1{color:#202226;text-align:center;text-overflow:ellipsis;white-space:nowrap;margin:0;font-size:clamp(1.08rem,5vw,1.3rem);font-weight:800;line-height:1.25;overflow:hidden}.icon-button{color:#23252a;cursor:pointer;background:0 0;border:0;border-radius:11px;place-items:center;width:44px;height:44px;padding:10px;display:grid}.icon-button:active{background:#e9eae7}.icon-button svg{width:24px;height:24px}.menu-button{justify-self:start}.progress-count{color:#60636b;justify-self:end;font-family:Segoe UI,Tahoma,sans-serif;font-size:.78rem;font-weight:700}.progress-track{background:#dedfdd;border-radius:999px;height:3px;margin:3px 2px 8px;overflow:hidden}.progress-track span{border-radius:inherit;background:#3157d5;height:100%;display:block}.listen-control{color:#232a42;cursor:pointer;background:#eef1fb;border:1px solid #d6dcf1;border-radius:13px;flex-direction:row-reverse;justify-content:space-between;align-items:center;gap:10px;width:100%;min-height:58px;padding:7px 12px 7px 8px;display:flex}.listen-control:active,.listen-control.is-playing{background:#e5eafb}.listen-control>span:last-child{text-align:right;flex:1;font-size:clamp(.9rem,4vw,1rem);font-weight:700;line-height:1.45}.listen-icon{color:#fff;background:#3157d5;border-radius:11px;flex:0 0 42px;place-items:center;width:42px;height:42px;display:grid}.listen-icon svg{width:27px;height:27px}.exercise-area{min-height:0;padding:0 12px max(12px, env(safe-area-inset-bottom))}.answer-grid{grid-template-rows:repeat(2,minmax(0,1fr));grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;height:100%;display:grid}.answer-tile{color:#17191d;cursor:pointer;touch-action:manipulation;background:#fff;border:1px solid #d9dad7;border-radius:14px;grid-template-rows:minmax(0,1fr) auto;min-width:0;min-height:0;padding:6px 7px 10px;display:grid;position:relative;overflow:hidden}.answer-tile:not(:disabled):active{background:#f1f2f1}.answer-tile:disabled{color:#17191d;opacity:1;cursor:default}.image-stage{place-items:center;min-width:0;min-height:0;display:grid;overflow:hidden}.image-stage img{object-fit:contain;-webkit-user-select:none;user-select:none;width:108%;max-width:none;height:108%;display:block}.answer-tile strong{letter-spacing:-.01em;text-align:center;white-space:nowrap;direction:ltr;place-items:center;min-height:34px;font-family:Segoe UI,Arial,sans-serif;font-size:clamp(1.08rem,4.8vw,1.35rem);font-weight:800;line-height:1.2;display:grid}.answer-tile.is-correct{background:#eef9f2;border-color:#24905c;box-shadow:inset 0 0 0 2px #24905c}.answer-tile.is-wrong{color:#74777c;background:#e8e9e7;border-color:#d24747;box-shadow:inset 0 0 0 2px #d24747}.answer-tile.is-wrong .image-stage,.answer-tile.is-wrong strong{opacity:.48;filter:grayscale()}.feedback-mark{color:#fff;background:#24905c;border-radius:50%;place-items:center;width:32px;height:32px;display:grid;position:absolute;top:8px;right:8px;box-shadow:0 0 0 3px #fff}.is-wrong .feedback-mark{background:#d24747}.feedback-mark svg{width:21px;height:21px}.completion{text-align:center;place-content:center;justify-items:center;height:100%;padding:24px;display:grid}.completion-mark{color:#fff;background:#24905c;border-radius:50%;place-items:center;width:64px;height:64px;display:grid}.completion-mark svg{width:38px;height:38px}.completion-kicker{color:#62656c;margin:20px 0 2px;font-size:.9rem;font-weight:700}.completion h2{margin:0;font-size:2rem}.completion p:not(.completion-kicker){color:#454850;margin:8px 0 22px;font-size:1rem}.completion button,.menu-action{color:#fff;cursor:pointer;background:#3157d5;border:0;border-radius:11px;min-height:48px;padding:0 22px;font-weight:800}.word-topbar{padding-bottom:8px}.word-instruction{color:#454850;text-align:center;place-items:center;min-height:40px;margin:2px 0 0;font-size:clamp(.9rem,4vw,1rem);font-weight:700;display:grid}.word-exercise-area{padding-top:0}.word-question{grid-template-rows:minmax(0,1fr) auto;gap:10px;height:100%;display:grid}.word-image-card{background:#fff;border:1px solid #d9dad7;border-radius:18px;place-items:center;min-width:0;min-height:0;padding:14px;display:grid;overflow:hidden}.word-image-card img{object-fit:contain;-webkit-user-select:none;user-select:none;width:100%;max-width:380px;height:100%;display:block}.word-chip-list{gap:8px;display:grid}.word-chip{color:#17191d;cursor:pointer;touch-action:manipulation;background:#fff;border:1px solid #d9dad7;border-radius:14px;place-items:center;width:100%;min-height:58px;padding:9px 48px;display:grid;position:relative}.word-chip:not(:disabled):active{background:#f1f2f1}.word-chip:disabled{opacity:1;cursor:default}.word-chip strong{text-align:center;direction:ltr;font-family:Segoe UI,Arial,sans-serif;font-size:clamp(1.08rem,5vw,1.3rem);font-weight:800;line-height:1.2}.word-chip.is-correct{background:#eef9f2;border-color:#24905c;box-shadow:inset 0 0 0 2px #24905c}.word-chip.is-wrong{color:#74777c;background:#e8e9e7;border-color:#d24747;box-shadow:inset 0 0 0 2px #d24747}.word-chip.is-wrong strong{opacity:.48}.initial-start-layer{z-index:9;-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px);background:#f7f7f5e0;place-items:center;padding:24px;display:grid;position:fixed;inset:0}.initial-start-button{color:#232a42;cursor:pointer;background:#eef1fb;border:1px solid #d6dcf1;border-radius:15px;align-items:center;gap:12px;min-height:64px;padding:10px 14px 10px 18px;display:flex;box-shadow:0 8px 30px #202a4624}.initial-start-button strong{font-size:1rem}.menu-layer{z-index:10;position:fixed;inset:0}.menu-backdrop{cursor:default;background:#14161c59;border:0;width:100%;height:100%;padding:0;position:absolute;inset:0}.menu-panel{width:min(78vw,300px);height:100%;padding:max(12px, env(safe-area-inset-top)) 14px max(16px, env(safe-area-inset-bottom));background:#f7f7f5;flex-direction:column;gap:12px;display:flex;position:absolute;top:0;left:0}.menu-heading{border-bottom:1px solid #dedfdd;justify-content:space-between;align-items:center;gap:12px;min-height:50px;display:flex}.menu-heading>div{gap:1px;display:grid}.menu-heading span{color:#3157d5;letter-spacing:.12em;font-family:Segoe UI,Arial,sans-serif;font-size:.76rem;font-weight:900}.menu-heading strong{font-size:1rem}.menu-heading .icon-button{flex:0 0 44px}.menu-action{width:100%;margin-top:6px}.menu-action-secondary{color:#273c83;background:#eef1fb;border:1px solid #cbd3ee;margin-top:0}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}@media (width>=620px){body{padding:16px 0}.app-shell{border:1px solid #d3d5d2;border-radius:20px;height:min(840px,100svh - 32px);min-height:min(680px,100svh - 32px)}}@media (height<=620px){.topbar{padding-top:max(5px, env(safe-area-inset-top));padding-bottom:7px}.topbar-row{min-height:40px}.icon-button{width:40px;height:40px}.listen-control{min-height:50px}.listen-icon{flex-basis:38px;width:38px;height:38px}.answer-tile{padding-bottom:6px}.answer-tile strong{min-height:28px}.word-instruction{min-height:32px}.word-question{gap:7px}.word-image-card{border-radius:14px;padding:8px}.word-chip-list{gap:6px}.word-chip{min-height:46px}}