:root{color-scheme:light;--ink:#1d1d1f;--muted:#77777f;--blue:#0071e3;--orange:var(--blue);--green:#248a3d;--surface:#fff;--box:#f5f5f7;--border:#e5e5ea;font-family:-apple-system,BlinkMacSystemFont,"SF Pro Display","SF Pro Text","Helvetica Neue",Arial,sans-serif;font-synthesis:none;-webkit-font-smoothing:antialiased}
*{box-sizing:border-box}html,body{margin:0;height:100%;overflow:hidden;background:#f5f5f7;color:var(--ink);font-size:16px}button,input,select{font:inherit}button{color:inherit;border:0;background:none;cursor:pointer;-webkit-tap-highlight-color:transparent;touch-action:manipulation;transition:background .18s,color .18s,box-shadow .18s,transform .18s}button:disabled{opacity:.35;cursor:default}button:active:not(:disabled){transform:scale(.96)}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #0071e380;outline-offset:4px}a{color:inherit;text-decoration:none}svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.65;stroke-linecap:round;stroke-linejoin:round;vertical-align:middle}p,h1,h2,h3{margin:0}[hidden]{display:none!important}
/* A quiet app shell and a compact segmented navigation. */
.app-toolbar{height:82px;padding:0 48px;display:flex;align-items:center;justify-content:space-between;gap:24px;background:#ffffffb8;border-bottom:1px solid #00000008;backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);position:relative;z-index:6}.brand{display:inline-flex;gap:10px;align-items:center;font-size:25px;font-weight:650;letter-spacing:-1px;min-width:160px}.brand-dot{color:var(--blue)}.brand-mark{height:34px;width:34px;background:linear-gradient(145deg,#2997ff,#0066cc);border:1px solid #ffffff40;box-shadow:0 2px 5px #0071e320,inset 0 1px 0 #ffffff40;color:white;display:grid;place-items:center;border-radius:11px}.brand-mark svg{width:25px;height:25px;stroke-width:1.9}.main-nav{display:flex;align-items:center;gap:4px;padding:5px;background:#eeeeef;border-radius:100px}.nav-item{min-height:35px;padding:8px 20px;border-radius:100px;color:#64646b;font-size:13px;font-weight:550;white-space:nowrap;display:flex;align-items:center;gap:6px}.nav-item:hover{color:var(--ink)}.nav-item.active{background:#fff;color:var(--ink);box-shadow:0 2px 6px #0000000c,0 0 1px #0000000f}.nav-icon{display:none}.nav-count{background:#0071e312;color:var(--blue);border-radius:20px;padding:2px 5px;min-width:19px;font-size:10px;text-align:center}.language-button{display:flex;align-items:center;justify-content:center;gap:9px;background:#fff;padding:10px 13px;border:1px solid #e8e8ed;border-radius:100px;font-size:13px;font-weight:550;min-height:42px}.language-button:hover{background:#f5f5f7}.language-button .flag{font-size:19px;line-height:1}.language-button svg{width:12px;height:12px;color:#8e8e93}
.workspace{height:calc(100dvh - 82px);display:flex;flex-direction:column;padding:24px 24px 28px;max-width:620px;margin:0 auto}.workspace-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:0 5px 20px;flex:none}.workspace-heading h1{font-size:29px;letter-spacing:-.95px;font-weight:650;line-height:1.15}.workspace-heading p{font-size:13px;color:var(--muted);margin-top:5px;letter-spacing:-.1px}.scroll-hint{display:flex;align-items:center;gap:7px;font-size:11px;color:#8e8e93;white-space:nowrap}.scroll-hint svg{width:16px;height:16px}.app{position:relative;width:100%;max-width:560px;height:100%;min-height:0;flex:1;margin:0 auto;background:#fff;border:1px solid #0000000a;border-radius:26px;overflow:hidden;box-shadow:0 18px 60px -24px #17223a30,0 3px 10px #00000004}
/* Native video feed; full frames for cinema, vertical frames for conversation. */
.feed{height:100%;overflow-y:auto;scroll-snap-type:y mandatory;overscroll-behavior:contain;scrollbar-width:none}.feed::-webkit-scrollbar{display:none}.feed-current,.feed-preview{height:100%;position:relative;display:flex;flex-direction:column;scroll-snap-align:start;scroll-snap-stop:always;isolation:isolate;background:white}.feed-preview{pointer-events:none;user-select:none}.sourcebar{height:66px;min-height:66px;padding:12px 19px;display:flex;align-items:center;gap:10px;background:#fff}.source-avatar{height:34px;width:34px;flex:none;background:#f1f1f4;color:#6d6d74;border:1px solid #00000004;border-radius:11px;display:grid;place-items:center;font-size:14px;font-weight:600}.source-text{flex:1;min-width:0}.clip-title{font-size:13px;font-weight:600;line-height:1.4;letter-spacing:-.2px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.source-link{display:block;color:#8a8a91;font-size:10px;margin-top:3px;line-height:1.3}.clip-level{font-size:10px;font-weight:600;letter-spacing:.2px;color:#707079;border:1px solid #e8e8ed;border-radius:6px;padding:4px 6px}.video-space{position:relative;flex:1;min-height:150px;background:#08090c;overflow:hidden}.video-holder{width:100%;height:100%}.video-holder video,.video-holder img{display:block;width:100%;height:100%;object-fit:cover;object-position:center}.play-toggle{position:absolute;inset:0;display:grid;place-items:center;width:100%;height:100%;padding:0}.play-toggle span{width:60px;height:60px;background:#16161b50;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid #ffffff35;border-radius:50%;display:grid;place-items:center;opacity:0;transition:opacity .2s;box-shadow:0 4px 20px #0002}.play-toggle.paused span,.play-toggle:focus-visible span{opacity:1}.play-toggle svg{width:24px;height:24px;color:#fff;margin-left:3px}.play-toggle:focus-visible{outline-offset:-5px}.player-error{position:absolute;inset:25% 20px auto;background:#24242ee0;backdrop-filter:blur(12px);color:white;text-align:center;padding:20px;font-size:13px;border-radius:18px}.player-error button{color:#2997ff;padding:12px;font-weight:600}
/* Subtitles and learning controls. */
.learning-area{position:relative;flex:none;height:236px;min-height:236px;padding:18px 24px 58px;background:#fff}.transcript-label{display:flex;align-items:center;justify-content:space-between;gap:8px;padding-bottom:13px;font-size:10px;color:#92929a}.transcript-label span:first-child{color:#77777f;font-weight:600}.transcript{height:134px;overflow:auto;overscroll-behavior:contain;scrollbar-width:none}.transcript::-webkit-scrollbar{display:none}.caption-line{display:none;padding:1px 0 8px}.caption-line.current{display:block}.caption-words{display:flex;flex-wrap:wrap;gap:11px 7px;align-items:flex-end}.word{display:inline-flex;flex-direction:column;align-items:center;gap:5px;border-radius:5px;padding:0;max-width:100%}.word .target{font-size:24px;line-height:1.25;font-weight:600;letter-spacing:-.65px;border-bottom:1.5px solid #0071e350;padding:0 1px 3px;white-space:nowrap}.word .reading{font-size:10px;line-height:1.15;font-weight:400;color:#9999a1;white-space:nowrap;max-width:125px}.word:hover .target{color:var(--blue);border-color:var(--blue)}.word.saved .target{border-color:#248a3d70}.word.selected .target{color:var(--blue);background:#e8f3ff;border-radius:5px 5px 0 0;border-color:var(--blue)}.sentence-translation{font-size:14px;line-height:1.55;letter-spacing:-.15px;color:#7d7d85;margin-top:15px}.tool-rail{position:absolute;bottom:6px;left:20px;display:flex;gap:3px;align-items:center}.rail-button{height:40px;width:38px;display:grid;place-items:center;padding:9px;color:#8a8a93;border-radius:11px}.rail-button svg{height:18px;width:18px}.rail-button:hover{background:#f5f5f7;color:var(--ink)}.rail-button.active{color:var(--blue)}.rate-button{font-size:12px;font-weight:600;letter-spacing:-.3px}.feed-next{position:absolute;right:17px;bottom:6px;display:flex;align-items:center;gap:3px}.feed-next button{display:grid;place-items:center;height:38px;width:34px;border-radius:11px;color:#7d7d86}.feed-next button:hover{background:#f5f5f7;color:var(--blue)}.feed-next svg{height:17px;width:17px}.clip-bottom{flex:none;height:64px;padding:0 24px 8px;background:white}.clip-progress{display:block;width:100%;height:13px;appearance:none;-webkit-appearance:none;background:transparent;margin:0;padding:0;cursor:pointer;--progress:0%}.clip-progress::-webkit-slider-runnable-track{height:3px;background:linear-gradient(to right,var(--blue) var(--progress),#ededf2 var(--progress));border-radius:10px}.clip-progress::-webkit-slider-thumb{appearance:none;-webkit-appearance:none;height:10px;width:10px;background:var(--blue);border:2px solid white;margin-top:-3.5px;border-radius:50%;opacity:0;box-shadow:0 0 3px #0003}.clip-progress:hover::-webkit-slider-thumb,.clip-progress:focus-visible::-webkit-slider-thumb{opacity:1}.clip-progress::-moz-range-track{height:3px;border-radius:10px;background:#ededf2}.clip-progress::-moz-range-progress{height:3px;background:var(--blue)}.clip-progress::-moz-range-thumb{height:8px;width:8px;background:var(--blue);border:2px solid white;border-radius:50%}.bottom-links{display:flex;gap:3px;height:38px;align-items:center}.clip-time{color:#92929a;font-size:10px;font-variant-numeric:tabular-nums;letter-spacing:.1px}.plain-button{height:38px;width:36px;display:grid;place-items:center;padding:9px;border-radius:10px;color:#85858e}.plain-button svg{width:17px;height:17px}.plain-button:hover{background:#f5f5f7;color:var(--ink)}.plain-button.active{color:var(--blue)}.share-button{margin-left:auto}.feed-preview .learning-area{overflow:hidden}.feed-preview .caption-line{display:block}.feed-preview .clip-bottom{padding-top:20px;font-size:11px;color:var(--muted)}
/* Translucent definition cards. */
.dictionary{position:absolute;z-index:5;bottom:300px;left:16px;right:16px;background:#fffffff5;backdrop-filter:blur(36px) saturate(1.5);-webkit-backdrop-filter:blur(36px) saturate(1.5);border:1px solid #ffffffc0;border-radius:24px;box-shadow:0 12px 44px #12213a2b,0 0 0 1px #00000005;padding:21px;overflow:auto;scrollbar-width:thin;max-height:415px;animation:appear .18s ease-out}.dictionary-top{display:flex;align-items:flex-start;gap:10px}.word-heading{flex:1;min-width:0}.dictionary h2{font-size:29px;font-weight:650;letter-spacing:-.9px;line-height:1.15}.word-ipa{display:block;font-size:12px;color:#8e8e96;margin-top:7px}.knowledge-badge{display:grid;place-items:center;min-width:29px;height:29px;padding:4px;border-radius:50%;color:var(--blue);background:#0071e310;font-size:12px;font-weight:600}.dictionary-close{height:28px;width:28px;border-radius:50%;background:#efeff2;color:#8b8b92;display:grid;place-items:center;padding:6px}.dictionary-close svg{height:13px;width:13px;stroke-width:2.2}.word-details{display:flex;align-items:center;gap:9px;margin-top:16px}.pos{padding:3px 7px;border-radius:6px;background:#eeeef2;color:#7f7f88;font-size:10px}.word-level{color:var(--green);font-size:10px;font-weight:600}.word-speak{margin-left:auto;height:33px;width:33px;padding:7px;color:var(--blue);background:#0071e309;border-radius:50%;display:grid;place-items:center}.word-speak svg{height:17px;width:17px}.dictionary-tabs{margin-top:15px;display:flex;padding:3px;gap:2px;border-radius:10px;background:#ededf2}.dictionary-tabs button{flex:1;display:flex;gap:5px;align-items:center;justify-content:center;min-height:30px;padding:6px 3px;border-radius:8px;font-size:10px;font-weight:500;color:#7a7a83}.dictionary-tabs button.active{background:white;color:var(--ink);box-shadow:0 1px 4px #0000000d}.dictionary-tabs svg{height:13px;width:13px}.dictionary-content{font-size:14px;line-height:1.6;margin-top:15px;max-height:180px;overflow-y:auto;scrollbar-width:thin}.definition-box{padding:13px;background:#f5f5f7;border-radius:13px}.definition-box .pos{display:inline-block;margin-bottom:7px;font-size:10px}.dictionary-content h3{font-size:11px;font-weight:500;color:#8e8e96;margin:9px 0}.dictionary-content .context{margin-bottom:7px}.dictionary-content .fr{font-size:13px;color:#7f7f88}.dictionary-content .practice{padding-top:12px;margin-top:12px;border-top:1px solid var(--border)}.dictionary-content .note{font-size:10px;color:#92929a;margin-top:10px}.dictionary-dots{display:flex;justify-content:center;gap:5px;padding-top:15px}.dictionary-dots span{height:4px;width:4px;background:#d8d8de;border-radius:50%}.dictionary-dots .active{background:var(--blue)}.knowledge-row{display:flex;gap:5px;justify-content:space-between;border-top:1px solid var(--border);margin-top:14px;padding-top:12px}.knowledge-row button{height:33px;width:33px;display:grid;place-items:center;border-radius:9px;background:#f5f5f7;color:#77777f;font-size:12px}.knowledge-row button.active{color:white;background:var(--blue)}.knowledge-row button:last-child{color:var(--green)}.knowledge-row svg{width:15px;height:15px}
/* Notebook, search and review. */
.screen{position:absolute;inset:0;z-index:5;background:#fff;display:flex;flex-direction:column;overflow:hidden}.screen-header{display:flex;align-items:center;gap:14px;padding:24px;min-height:86px}.screen-header h1{font-size:28px;font-weight:650;letter-spacing:-.9px;flex:1}.screen-header button{height:34px;width:34px;display:grid;place-items:center;padding:7px;background:#f5f5f7;border-radius:50%;color:#7a7a83}.screen-header svg{height:18px;width:18px}.library-toolbar{display:flex;align-items:center;gap:12px;padding:0 24px 18px}.library-toolbar span{flex:1;font-size:12px;color:var(--muted)}.orange-button{background:var(--blue);color:#fff;border-radius:100px;padding:11px 19px;font-size:13px;font-weight:550;min-height:40px}.orange-button:hover{background:#0077ed}.outline-button{background:#f1f1f4;color:var(--blue);border-radius:100px;padding:11px 20px;font-size:13px;font-weight:500;min-height:42px}.library-words{flex:1;min-height:0;overflow-y:auto;padding:0 24px 22px;scrollbar-width:thin}.saved-word-row{display:flex;align-items:center;gap:8px;padding:21px 0;border-bottom:1px solid #ededf2}.word-row-main{flex:1;min-width:0}.saved-word-row h2{font-size:22px;font-weight:600;letter-spacing:-.6px;margin-bottom:6px}.saved-word-row p{font-size:13px;line-height:1.5;color:#77777f}.saved-word-row small{display:block;font-size:10px;color:#a0a0a8;margin-top:8px}.saved-word-row button{color:#8f8f97;padding:6px;height:32px;width:28px;border-radius:8px}.saved-word-row button:hover{color:var(--blue);background:#f5f5f7}.saved-word-row svg{height:15px;width:15px}.small-badge{width:23px;height:23px;display:grid;place-items:center;border-radius:50%;color:var(--blue);background:#0071e30d;font-size:10px}.library-footer{display:flex;justify-content:space-between;padding:18px 24px;border-top:1px solid var(--border);font-size:10px;color:#9999a1}.library-footer button{font-size:11px;color:var(--blue);padding:0}.empty{margin:auto 24px;text-align:center;color:var(--muted);line-height:1.7;font-size:14px}.empty h2{color:var(--ink);font-size:25px;font-weight:600;letter-spacing:-.7px;line-height:1.3;margin-bottom:14px}.empty button{margin-top:20px}.search-header{display:flex;align-items:center;gap:12px;padding:24px 22px 5px}.search-header input{flex:1;min-width:0;background:#f1f1f4;border:1px solid transparent;border-radius:13px;padding:13px 14px;color:var(--ink);font-size:15px}.search-header input::placeholder{color:#a0a0a8}.search-header button{font-size:13px;color:var(--blue);padding:10px 0}.search-results{flex:1;min-height:0;padding:18px 23px;overflow-y:auto;scrollbar-width:thin}.search-label{font-size:11px;color:#92929a;padding:0 0 12px}.search-result{width:100%;display:flex;align-items:center;gap:14px;padding:16px 0;text-align:left;border-bottom:1px solid #ededf2}.search-result img{width:88px;height:61px;border-radius:10px;flex:none;object-fit:cover;background:#f5f5f7}.search-result strong{display:block;font-size:14px;line-height:1.45;font-weight:550;letter-spacing:-.2px}.search-result span{display:block;font-size:10px;color:#92929a;margin-top:7px;line-height:1.5}
.review{background:#f5f5f7}.review-header{display:flex;align-items:center;gap:13px;padding:20px 24px;height:66px;min-height:66px}.review-header button{height:28px;width:28px;padding:5px;color:#8e8e96}.review-header svg{height:17px;width:17px}.review-progress{flex:1;height:4px;background:#e0e0e6;border-radius:10px;overflow:hidden}.review-progress span{display:block;height:100%;background:var(--blue);border-radius:inherit}.review-counter{font-size:10px;color:#8e8e96;font-variant-numeric:tabular-nums}.review-card-space{perspective:1200px;flex:1;min-height:0;margin:0 24px 20px}.review-card{height:100%;position:relative;transform-style:preserve-3d;transition:transform .35s cubic-bezier(.2,.7,.3,1)}.review-card.flipped{transform:rotateY(180deg)}.card-face{position:absolute;inset:0;border-radius:23px;background:white;border:1px solid #00000005;box-shadow:0 6px 24px #18244406;backface-visibility:hidden;overflow:hidden}.card-front{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:24px;text-align:center;width:100%}.card-front h2{font-size:clamp(32px,7vw,48px);font-weight:600;line-height:1.25;letter-spacing:-1.4px}.card-front .reveal{margin-top:25px;color:#aaaab2;font-size:12px;font-weight:400}.card-back{transform:rotateY(180deg);padding:25px;overflow-y:auto;scrollbar-width:thin}.card-back-title{display:flex;align-items:center;justify-content:center;gap:10px}.card-back-title .word-speak{margin-left:0}.card-back h2{text-align:center;font-size:29px;font-weight:600;letter-spacing:-.9px}.card-back .ipa{text-align:center;margin:7px 0 24px;color:#92929a;font-size:12px}.card-back h3{color:#92929a;font-size:11px;font-weight:500;margin:19px 0 10px}.card-back .definition-box{font-size:14px;line-height:1.6}.card-context{font-size:14px;line-height:1.65}.card-context .selected{color:var(--blue);font-weight:550}.card-context small{display:block;margin-top:7px;font-size:12px;color:#8e8e96}.context-video{display:block;width:100%;aspect-ratio:16/9;padding:0;position:relative;border-radius:13px;overflow:hidden;background:#000;margin-top:16px}.context-video img{width:100%;height:100%;object-fit:cover}.context-video .context-play{position:absolute;inset:50% auto auto 50%;transform:translate(-50%,-50%);width:43px;height:43px;border-radius:50%;background:#ffffff40;backdrop-filter:blur(12px);display:grid;place-items:center;color:white;border:1px solid #ffffff30}.context-video svg{height:18px;width:18px;margin-left:2px}.context-video video,video.context-video{object-fit:contain;background:#000}.review-ratings{flex:none;display:flex;gap:12px;margin:0 24px 24px}.review-ratings button{flex:1;border-radius:16px;padding:13px 5px;min-height:61px;font-size:14px;line-height:1.3;font-weight:550}.review-ratings small{display:block;margin-top:4px;font-size:10px;font-weight:400;opacity:.7}.review-ratings .again{background:#ffe9e7;color:#d3443b}.review-ratings .good{background:var(--blue);color:white}.review .empty{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center}
/* Light, translucent sheets with familiar iOS controls. */
.sheet{position:fixed;inset:auto 0 26px;margin:0 auto;width:min(480px,calc(100% - 32px));max-height:85dvh;overflow-y:auto;border:1px solid #ffffffa0;border-radius:28px;background:#fffffff7;backdrop-filter:blur(40px) saturate(1.4);-webkit-backdrop-filter:blur(40px) saturate(1.4);color:var(--ink);padding:27px;box-shadow:0 25px 90px #14213b30;font-family:inherit}.sheet::backdrop{background:#1b243840;backdrop-filter:blur(5px);-webkit-backdrop-filter:blur(5px)}.sheet-top{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:25px}.sheet-top h2{font-size:23px;letter-spacing:-.7px;font-weight:600;line-height:1.25}.sheet-top button{width:29px;height:29px;flex:none;border-radius:50%;background:#eeeef2;color:#92929a;display:grid;place-items:center;padding:7px}.sheet-top svg{width:14px;height:14px;stroke-width:2}.language-options{display:flex;padding:4px;gap:4px;background:#eeeef2;border-radius:14px;margin-bottom:24px}.language-options button{flex:1;min-height:44px;border-radius:10px;padding:11px 5px;font-size:14px;color:#808089}.language-options .active{background:white;color:var(--ink);box-shadow:0 1px 5px #0000000b;font-weight:500}.setting-row{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:17px 0;border-top:1px solid var(--border);font-size:13px;line-height:1.5}.setting-row input{appearance:none;-webkit-appearance:none;flex:none;width:43px;height:26px;background:#dedee3;border:0;border-radius:30px;position:relative;cursor:pointer;margin:0;transition:background .2s}.setting-row input:before{content:'';position:absolute;height:22px;width:22px;left:2px;top:2px;border-radius:50%;background:white;box-shadow:0 1px 4px #0002;transition:transform .2s}.setting-row input:checked{background:#34c759}.setting-row input:checked:before{transform:translateX(17px)}.settings-note{color:#92929a;font-size:11px;line-height:1.7;margin-top:20px}.info-rows{font-size:13px;line-height:1.65}.info-rows div{display:flex;justify-content:space-between;gap:24px;padding:12px 0;border-bottom:1px solid var(--border)}.info-rows span{color:#92929a}.info-rows .info-note{margin-top:19px;color:#86868f;font-size:12px}.info-rows a{display:inline-block;margin-top:18px;color:var(--blue);font-size:12px}.toast{position:fixed;bottom:28px;left:50%;transform:translate(-50%,10px);z-index:15;background:#fffffff2;backdrop-filter:blur(24px);border:1px solid #00000008;border-radius:100px;box-shadow:0 5px 24px #14213b20;color:#50505a;padding:13px 21px;font-size:12px;opacity:0;pointer-events:none;transition:.2s;width:max-content;max-width:90%;text-align:center}.toast.show{opacity:1;transform:translate(-50%,0)}.no-reading .reading{display:none}.no-reading .word{gap:0}.immersive .sourcebar{display:none}.app:fullscreen{max-width:620px;margin:auto;border-radius:0}@keyframes appear{from{opacity:0;transform:translateY(5px) scale(.99)}to{opacity:1;transform:none}}
@media(max-width:650px){.app-toolbar{height:calc(69px + env(safe-area-inset-top));padding:env(safe-area-inset-top) 20px 0;gap:12px;border-bottom:0;background:#f5f5f7;backdrop-filter:none}.brand{min-width:0;font-size:24px;gap:8px}.brand-mark{width:31px;height:31px;border-radius:10px}.brand-mark svg{width:23px;height:23px}.language-button{min-height:36px;font-size:12px;padding:8px 11px;gap:7px}.language-button .flag{font-size:17px}.main-nav{position:fixed;left:16px;right:16px;bottom:calc(12px + env(safe-area-inset-bottom));width:min(440px,calc(100% - 32px));margin:auto;z-index:10;min-height:62px;justify-content:space-around;padding:5px;gap:3px;background:#ffffffe8;border:1px solid #ffffffc0;box-shadow:0 4px 28px #14213b13,0 0 0 1px #00000004;backdrop-filter:blur(28px) saturate(1.5);-webkit-backdrop-filter:blur(28px) saturate(1.5)}.nav-item{position:relative;flex:1;flex-direction:column;gap:4px;min-height:50px;padding:6px;border-radius:100px;font-size:9px;font-weight:500;letter-spacing:-.1px;color:#92929a}.nav-icon{display:block;height:21px}.nav-icon svg{height:21px;width:21px;stroke-width:1.7}.nav-item.active{color:var(--blue);background:#0071e30c;box-shadow:none}.nav-count{position:absolute;top:5px;left:calc(50% + 7px);font-size:8px;padding:1px 4px;min-width:15px;background:var(--blue);color:white;border:2px solid #fff}.workspace{max-width:520px;height:calc(100dvh - 69px - env(safe-area-inset-top) - 88px - env(safe-area-inset-bottom));padding:0 12px 4px}.workspace-heading{display:none}.app{border-radius:24px;border-color:#00000004;box-shadow:0 5px 24px #14213b09}.sourcebar{height:60px;min-height:60px;padding:11px 16px;gap:8px}.source-avatar{width:31px;height:31px;font-size:12px;border-radius:10px}.clip-title{font-size:12px}.source-link{font-size:9px}.clip-level{font-size:9px;padding:3px 5px}.learning-area{padding-left:19px;padding-right:19px}.word .target{font-size:23px}.word .reading{font-size:9px}.caption-words{gap:10px 6px}.transcript-label{font-size:9px}.tool-rail{left:12px;gap:1px}.rail-button{width:35px}.feed-next{right:11px}.clip-bottom{padding-left:20px;padding-right:20px}.dictionary{left:10px;right:10px;padding:18px;border-radius:21px}.sheet{inset:auto 0 0;width:100%;border-radius:28px 28px 0 0;padding:26px 24px calc(26px + env(safe-area-inset-bottom))}.toast{bottom:calc(90px + env(safe-area-inset-bottom))}.screen-header{padding:22px}.saved-word-row{gap:5px}.library-words,.library-toolbar{padding-left:20px;padding-right:20px}}
@media(max-height:740px){.app-toolbar{height:64px}.workspace{height:calc(100dvh - 64px);padding-top:16px;padding-bottom:18px}.workspace-heading{padding-bottom:13px}.workspace-heading h1{font-size:25px}.workspace-heading p{font-size:12px}.sourcebar{height:54px;min-height:54px;padding-top:8px;padding-bottom:8px}.learning-area{height:205px;min-height:205px;padding-top:13px}.transcript-label{padding-bottom:10px}.word .target{font-size:21px}.word .reading{font-size:9px}.sentence-translation{font-size:12px;margin-top:11px}.clip-bottom{height:55px;padding-bottom:0}.video-space{min-height:100px}.review-header{height:56px;min-height:56px;padding-top:12px;padding-bottom:12px}.review-card-space{margin-bottom:14px}.review-ratings{margin-bottom:18px}.card-back{padding:20px}.card-back .ipa{margin-bottom:16px}}
@media(max-width:650px) and (max-height:740px){.app-toolbar{height:calc(62px + env(safe-area-inset-top))}.workspace{height:calc(100dvh - 62px - env(safe-area-inset-top) - 85px - env(safe-area-inset-bottom));padding-top:0;padding-bottom:0}.main-nav{min-height:58px;bottom:calc(10px + env(safe-area-inset-bottom))}.nav-item{min-height:46px}}
@media(max-height:500px) and (min-width:651px){.app-toolbar{height:52px;padding:0 24px}.workspace{height:calc(100dvh - 52px);padding:10px 0;max-width:780px}.workspace-heading{display:none}.app{max-width:760px}.feed-current,.feed-preview{display:grid;grid-template-columns:1fr 1fr;grid-template-rows:50px minmax(0,1fr) 54px}.sourcebar{grid-column:1/-1;height:50px;min-height:50px}.video-space{grid-column:1;grid-row:2/4;min-height:0}.learning-area{grid-column:2;grid-row:2;min-height:0!important;height:100%!important;padding:13px 18px 49px}.transcript{height:calc(100% - 28px)!important}.clip-bottom{grid-column:2;grid-row:3;height:54px;padding:0 18px}.transcript-label span:last-child{display:none}.dictionary{right:auto;width:calc(50% - 20px);bottom:12px!important;max-height:calc(100% - 74px)!important}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{transition:none!important;animation:none!important;scroll-behavior:auto!important}.review-card{transform:none!important}.card-face{backface-visibility:visible}.card-back{transform:none}}

/* Rounded iPhone-style bubbles: every pill is a real control. */
.app{border-radius:30px}
.source-avatar{border-radius:50%;background:#f0f1f5}
.clip-level{border:0;border-radius:100px;background:#f1f1f5;padding:5px 8px}
.caption-words{gap:10px 6px}
.word{gap:5px;border-radius:15px}
.word .target{font-size:21px;letter-spacing:-.5px;padding:5px 9px 6px;border:1px solid #e8eaf0;border-radius:14px;background:#f3f4f7;line-height:1.2;transition:background .16s,color .16s,border-color .16s}
.word .reading{font-size:9px;color:#94949e}
.word:hover .target{color:var(--blue);background:#eaf3fe;border-color:#0071e330}
.word.saved .target{color:#0066cc;border-color:#0071e325;background:#edf5ff}
.word.selected .target{background:var(--blue);border-color:var(--blue);color:#fff;border-radius:14px;box-shadow:0 3px 8px #0071e320}
.sentence-translation{display:inline-block;max-width:100%;margin-top:14px;padding:10px 13px;border-radius:16px 16px 16px 5px;background:#f2f2f7;color:#73737e;font-size:13px;line-height:1.45}
.tool-rail{bottom:5px;left:15px;gap:3px;padding:4px;border-radius:100px;background:#f2f2f6;border:1px solid #00000002}
.rail-button{width:34px;height:34px;padding:8px;border-radius:50%;color:#8a8a95}
.rail-button:hover{background:#fff;box-shadow:0 1px 5px #00000006}
.rail-button.active{background:#fff;color:var(--blue);box-shadow:0 1px 5px #00000008}
.feed-next{bottom:5px;right:15px;gap:2px;padding:4px;background:#f2f2f6;border:1px solid #00000002;border-radius:100px}
.feed-next button{width:30px;height:34px;border-radius:50%}
.feed-next button:hover{background:#fff;color:var(--blue)}
.bottom-links{gap:7px}
.plain-button{width:31px;height:31px;padding:8px;border-radius:50%;background:#f5f5f8}
.plain-button svg{width:15px;height:15px}
.plain-button.active{background:#eaf3ff}
.dictionary{border-radius:28px;box-shadow:0 8px 24px #12213a18,0 0 0 1px #00000005}
.dictionary-tabs{border-radius:100px;padding:4px}
.dictionary-tabs button{border-radius:100px}
.dictionary-close,.sheet-top button{position:relative}
.dictionary-close:after,.sheet-top button:after{content:'';position:absolute;inset:-7px;border-radius:50%}
.review-ratings button{border-radius:100px}
.language-options{border-radius:100px}
.language-options button{border-radius:100px}
@media(max-width:650px){.app{border-radius:28px}.word .target{font-size:21px;padding:5px 8px 6px}.tool-rail{left:12px;gap:2px}.rail-button{width:31px}.feed-next{right:12px}.feed-next button{width:28px}.dictionary{border-radius:25px}.sheet{inset:auto 12px calc(12px + env(safe-area-inset-bottom));width:calc(100% - 24px);border-radius:30px;padding:25px 22px}.main-nav{border-radius:100px}.toast{border-radius:100px}}
@media(max-height:740px){.word .target{font-size:19px;padding:4px 7px 5px}.sentence-translation{font-size:12px;padding:8px 11px;margin-top:11px}.caption-words{gap:8px 5px}}
@media(min-width:651px) and (max-width:820px){.app-toolbar{padding-left:22px;padding-right:22px;gap:12px}.brand{min-width:0;font-size:23px}.nav-item{padding-left:15px;padding-right:15px}}

/* Keep the toolbar balanced without a brand label. */
.app-toolbar{justify-content:flex-end}.main-nav{margin-right:auto}

.account-chip{display:flex;align-items:center;gap:9px;margin-right:8px;color:#8793a5;font-size:11px;white-space:nowrap}.account-chip svg{width:27px;height:27px;padding:5px;border:1px solid #e8edf5;border-radius:50%;color:#74839b}.account-error{position:fixed;z-index:20;bottom:100px;left:50%;transform:translateX(-50%);width:min(460px,90%);padding:15px 20px;border:1px solid #ead9d5;border-radius:16px;background:#fff5f3;color:#a65b4c;font-size:13px;line-height:1.6;box-shadow:0 8px 30px #0001}.account-error button{font-size:12px;color:#0878f9;margin-left:15px}.youtube-space{min-height:200px}.youtube-space iframe{height:100%;width:100%;border:0}.quota-copy{font-size:16px;line-height:1.7;color:#7c8aa0}.quota-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:25px}.quota-actions a{border-radius:100px;background:#0878f9;color:white;padding:13px 18px;font-size:13px}.quota-actions a:last-child{background:#edf2f8;color:#71819a}@media(max-width:650px){.account-chip{margin-left:auto;margin-right:auto;font-size:10px}.account-chip svg{width:26px;height:26px}.app-toolbar{gap:8px}.language-button{font-size:11px;padding:8px 10px}.youtube-space{min-height:200px}.language-options button{font-size:12px}}