:root{--blue:#2861f5;--bg:#f7f9fc;--paper:#fff;--text:#202e43;--muted:#8092b0;--line:#dfe7f2;--soft:#eef5ff;--shadow:0 1px 3px #19365b0b;color-scheme:light;font:16px/1.55 Inter,'Segoe UI','Microsoft YaHei',sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text)}body.dark{--bg:#101724;--paper:#192436;--text:#e7edf8;--muted:#9daec5;--line:#32435b;--soft:#20395a;color-scheme:dark}button,input,select{font:inherit;color:inherit}button,a,select{touch-action:manipulation}button{cursor:pointer;background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:9px 15px}button:hover{color:var(--blue);border-color:#98b5ff}button:disabled{opacity:.5;cursor:wait}button.active,.primary{background:var(--blue);color:white;border-color:var(--blue)}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #79a3ff;outline-offset:3px}input,select{width:100%;background:var(--bg);border:1px solid var(--line);border-radius:14px;padding:11px 14px}h1,h2,h3,p{margin:0}h1{font-size:24px}h2{font-size:20px}h3{font-size:18px}.topbar{height:82px;background:var(--paper);border-bottom:1px solid var(--line);display:flex;align-items:center;gap:25px;padding:0 40px;position:sticky;top:0;z-index:20}.brand{display:flex;gap:7px;align-items:center;color:var(--blue);font-size:29px;font-weight:750;letter-spacing:-1px}.brand span{color:var(--text)}.brand b{color:var(--blue)}nav{margin-left:auto;display:flex;gap:20px}nav a{padding:10px 16px;border-radius:30px;white-space:nowrap;color:#4b5c78}nav a.active{background:var(--soft);color:var(--blue)}.account{border-radius:30px;white-space:nowrap;color:#587093;font-size:14px}.layout{display:grid;grid-template-columns:280px 1fr;min-height:calc(100vh - 82px)}.sidebar{padding:2px 12px 25px 10px;border-right:1px solid var(--line);overflow-y:auto;height:calc(100vh - 82px);position:sticky;top:82px}.panel{background:var(--paper);border:1px solid var(--line);border-radius:27px;box-shadow:var(--shadow);padding:20px;margin-bottom:14px}.panel-title{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;font-weight:700;font-size:20px}.blue{color:var(--blue)}.icon-button{padding:5px 10px;border:0;background:var(--bg);font-size:23px;border-radius:14px}.stats{display:grid;grid-template-columns:repeat(4,1fr);padding:6px 0 21px;border-bottom:1px solid var(--line);gap:5px}.stat{text-align:center;font-size:12px;color:var(--muted)}.stat strong{font-size:24px;display:block;line-height:1.35;color:#6651ff}.stat:nth-child(2) strong{color:#00a27a}.stat:nth-child(3) strong{color:#e38a00}.stat:nth-child(4) strong{color:#ee2362}.calendar-title{display:flex;justify-content:space-between;align-items:center;margin:8px 0 20px;font-size:14px;font-weight:650}.calendar{display:grid;grid-template-columns:repeat(7,1fr);gap:7px 1px;text-align:center;font-size:14px;color:#7187aa}.calendar span{display:grid;place-items:center;min-height:25px}.calendar .today{border-radius:50%;background:#009c78;color:#fff;font-weight:700}.calendar .studied{box-shadow:inset 0 -3px #2861f5}.field{margin:20px 0}.field label{display:block;font-size:14px;color:var(--muted);margin-bottom:10px}.segmented{display:flex;background:var(--bg);border:1px solid var(--line);padding:4px;border-radius:16px}.segmented button{flex:1;border:0;background:transparent;padding:5px;font-size:14px}.segmented button.selected{background:var(--paper);color:var(--blue);box-shadow:var(--shadow)}.content{padding:6px 32px 40px;min-width:0}.tabs{display:flex;border-bottom:1px solid var(--line);gap:4px;background:var(--paper);overflow:auto}.tabs button{border:0;border-radius:0;padding:17px 21px;font-weight:650;color:#64758e;white-space:nowrap}.tabs button.active{background:transparent;color:var(--blue);border-bottom:2px solid var(--blue)}.resultbar{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px 4px 14px;color:var(--muted);font-size:14px}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px}.card{background:var(--paper);border:1px solid #edf1f7;border-radius:21px;overflow:hidden;box-shadow:var(--shadow);transition:transform .15s;min-width:0}.card:hover{transform:translateY(-3px)}.cover{position:relative;aspect-ratio:16/9;background:#dae3ef;display:block;overflow:hidden}.cover img{width:100%;height:100%;object-fit:cover;display:block}.badge{position:absolute;left:10px;top:10px;background:linear-gradient(110deg,#4189ff,#795cff);color:#fff;border-radius:20px;padding:3px 11px;font-size:13px;font-weight:600}.badge.pending{background:#f2a000}.badge.done{background:#059e79}.heart{position:absolute;right:11px;top:11px;background:#fffffff0;border:0;border-radius:50%;width:40px;height:40px;padding:0;color:#8ca0ba;font-size:26px;display:grid;place-items:center}.heart.saved{color:#ed4b81}.duration{position:absolute;bottom:11px;right:10px;background:#000b;color:#fff;font-size:13px;padding:4px 10px;border-radius:7px;font-weight:600}.card-copy{padding:17px 20px}.card h3{overflow:hidden;white-space:nowrap;text-overflow:ellipsis;font-size:19px}.description{color:#7386a5;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:14px;margin:3px 0 12px}.tags{display:flex;gap:7px;flex-wrap:wrap;max-height:66px;overflow:hidden}.tag{font-size:12px;padding:4px 10px;border:1px solid #ffdced;border-radius:6px;background:#fff3f9;color:#ef2670}.tag:nth-child(2){color:#7140c8;background:#f3e8ff;border-color:#d8b8ff}.tag:nth-child(3){color:#92810a;background:#fffee1;border-color:#f6eca5}.card-footer{display:flex;justify-content:space-between;color:#92a2bc;font-size:12px;margin-top:15px;border-top:1px solid #f1f4f8;padding-top:13px}.accent{border:1px solid var(--line);border-radius:20px;padding:1px 10px;color:#6880a3;background:var(--bg)}.searchbox{display:flex;gap:10px;max-width:780px;margin:16px 0 20px}.searchbox input{background:var(--paper)}.searchbox button{white-space:nowrap}.empty{text-align:center;padding:110px 20px;color:var(--muted)}.empty-symbol{font-size:44px;display:block;margin-bottom:20px;color:#c5d3e4}.more{display:block;margin:25px auto}.breadcrumb{display:flex;align-items:center;gap:12px;margin:15px 0 20px}.subtitle{color:var(--muted);font-size:14px}.folders{display:flex;flex-direction:column;gap:10px}.folders button{text-align:left;display:flex;justify-content:space-between}.collection-tools{display:flex;gap:10px;margin:15px 0}.collection-tools button{font-size:14px;border-radius:30px}.saved-entry{background:var(--paper);border:1px solid var(--line);padding:20px;border-radius:18px;margin:14px 0;display:flex;gap:15px;align-items:flex-start}.saved-entry .entry-main{flex:1;min-width:0}.saved-entry h3{font-size:21px}.saved-entry p{color:var(--muted);margin-top:8px}.entry-buttons{display:flex;gap:8px;flex-wrap:wrap}.method{max-width:850px;margin:30px auto;padding:30px}.method section{padding:25px 0;border-bottom:1px solid var(--line)}.method p{margin-top:10px;color:var(--muted)}.player-header{display:flex;align-items:center;gap:14px;padding:15px 25px;background:var(--paper);border-bottom:1px solid var(--line)}.player-header h1{font-size:22px;flex:1}.player-grid{display:grid;grid-template-columns:minmax(350px,.95fr) minmax(380px,1.05fr);gap:22px;padding:22px 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.en{font-size:var(--subtitle-size,24px);font-weight:650;line-height:1.7;letter-spacing:.3px;margin-top:8px;color:var(--text)}.sentence .zh{font-size:calc(var(--subtitle-size,24px) * .82);color:#939fac;margin-top:10px;line-height:1.7}.sentence .phonetics{color:#7086a8;margin-top:8px;line-height:1.8}.word{border-radius:5px;cursor:pointer}.word.current-word{outline:3px solid #37d37c;outline-offset:2px}.highlight-word{color:#bb51ed}.highlight-phrase{color:#ed72ae}.sentence-star{background:transparent;border:0;padding:0 5px;font-size:26px;color:#8cb5e1}.sentence-star.saved{color:#f4b028}.player-toolbar{background:var(--paper);border:1px solid var(--line);border-radius:20px;padding:13px 10px;box-shadow:var(--shadow)}.tools-row{display:flex;justify-content:space-around;gap:2px}.tool{border:0;background:transparent;display:flex;flex-direction:column;align-items:center;padding:5px 9px;font-size:14px;color:#566579;gap:5px}.tool strong{font-size:23px;line-height:1.4}.tool.enabled{color:var(--blue);background:var(--soft)}.transport{display:flex;align-items:center;justify-content:space-around;border-top:1px solid var(--line);margin-top:12px;padding:14px 0 0}.transport button{border:0;font-size:22px}.transport .play{border-radius:50%;width:58px;height:58px;background:var(--blue);color:#fff;font-size:27px;box-shadow:0 5px 15px #2861f52b}.play-note{text-align:center;color:var(--muted);font-size:13px;min-height:24px;margin-top:7px}.loading{padding:60px;text-align:center;color:var(--muted)}.error-banner{background:#fff3ea;border:1px solid #ffccaa;padding:15px;color:#a34c13;border-radius:12px;margin:15px}dialog{border:1px solid var(--line);background:var(--paper);color:var(--text);border-radius:24px;width:min(560px,92vw);max-height:85vh;padding:30px;box-shadow:0 20px 100px #14234240}dialog::backdrop{background:#10203355;backdrop-filter:blur(3px)}.modal-close{position:absolute;right:12px;top:10px}.modal-section{margin:20px 0}.modal-section p{color:var(--muted);margin:10px 0}.vocab-list{max-height:55vh;overflow:auto}.vocab-row{padding:15px 0;border-bottom:1px solid var(--line);display:flex;gap:15px;justify-content:space-between}.vocab-row b{color:#a346dc}.vocab-row p{color:var(--muted);font-size:14px;margin:5px 0}.vocab-row button{align-self:center}.record-actions{display:flex;gap:10px;margin:20px 0}.recordings audio{width:100%;margin:12px 0}.note{font-size:14px;color:var(--muted)}#toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);padding:12px 23px;background:#24344cee;color:#fff;border-radius:14px;z-index:100;opacity:0;pointer-events:none;transition:opacity .2s;max-width:90vw}#toast.show{opacity:1}.hidden{display:none!important}.mobile-filter{display:none}.scroll-top{scroll-margin-top:90px}.search-hit{display:block;margin:12px 0;padding:20px;background:var(--paper);border:1px solid var(--line);border-radius:15px}.search-hit p{margin:8px 0}.search-hit small{color:var(--muted)}.folder-select{margin:10px 0}.account-info{line-height:2}.study-actions{display:flex;gap:10px;flex-wrap:wrap}.check-line{display:flex;align-items:center;justify-content:space-between;gap:15px;margin:20px 0}.check-line input{width:22px;height:22px}.blank-cover{display:grid;place-items:center;height:100%;color:#607a9e;background:#e8eef8;padding:20px;text-align:center}.calendar-nav{border:0;background:transparent;padding:5px;color:var(--muted)}
@media(min-width:1650px){.layout{grid-template-columns:290px 1fr}.content{padding-left:40px;padding-right:40px}.grid{gap:30px}.card-copy{padding:18px 20px}}
@media(max-width:1200px){.topbar{padding:0 20px;gap:10px}nav{gap:3px}nav a{padding:10px;font-size:14px}.account span{display:none}.layout{grid-template-columns:250px 1fr}.grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.content{padding:6px 20px 30px}.player-grid{padding:18px;gap:16px}.tool{padding:5px;font-size:13px}}
@media(max-width:760px){.topbar{height:64px;padding:0 15px}.brand{font-size:23px}.account{display:none}nav{gap:0}nav a{font-size:0;padding:9px 10px}nav a .nav-icon{font-size:22px}.layout{display:block}.sidebar{display:none;position:static;height:auto;padding:15px}.sidebar.open{display:block}.content{padding:0 14px 25px}.tabs button{padding:15px 17px}.tabs{margin:0 -14px;padding:0 10px}.grid{gap:17px;grid-template-columns:repeat(2,minmax(0,1fr))}.card{border-radius:15px}.card-copy{padding:12px}.card h3{font-size:16px;white-space:normal;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;line-height:1.45;height:46px}.description{font-size:12px}.tags{max-height:29px;gap:4px}.tag{font-size:12px;padding:2px 5px}.card-footer{margin-top:10px;padding-top:10px}.card-footer time{display:none}.heart{width:31px;height:31px;font-size:21px;right:7px;top:7px}.badge{font-size:12px;left:7px;top:8px;padding:2px 7px}.duration{font-size:12px;right:6px;bottom:7px;padding:2px 6px}.mobile-filter{display:block;padding:6px 12px}.player-page~#toast{bottom:180px}.player-header{padding:12px 15px;position:sticky;top:64px;z-index:11}.player-header h1{font-size:20px}.player-grid{display:flex;flex-direction:column;padding:10px 12px 180px;gap:10px}.video-column{position:sticky;top:126px;z-index:10;background:var(--bg);margin:-1px -1px 0}.video-frame{border-radius:20px}.video-info{display:none}.transcripts{height:auto;overflow:visible;padding:0;scroll-behavior:auto}.sentence{padding:16px 18px;border-radius:14px;margin-bottom:8px}.sentence .en{font-size:var(--subtitle-size,24px)}.sentence .zh{font-size:calc(var(--subtitle-size,24px) * .8)}.player-toolbar{position:fixed;bottom:0;left:0;right:0;z-index:30;border-radius:0;border:0;border-top:1px solid var(--line);padding:9px 10px max(9px,env(safe-area-inset-bottom))}.tool{font-size:14px;padding:2px 9px}.tool strong{font-size:25px}.transport{padding-top:8px;margin-top:8px}.transport .play{height:51px;width:51px}.transport button{padding:3px 10px}.play-note{display:none}.collection-layout .sidebar{display:block;padding:14px}.collection-layout .sidebar .panel{border-radius:18px;padding:15px;margin-bottom:10px}.collection-layout .sidebar .panel-title{margin:0 0 10px;font-size:18px}.collection-layout .folders{flex-direction:row;overflow:auto}.folders button{white-space:nowrap;gap:15px}.saved-entry{padding:15px;flex-wrap:wrap}.method{margin:10px;padding:20px}.modal-section h2{margin-right:15px}.empty{padding:70px 15px}.collection-tools{gap:6px}.collection-tools button{font-size:13px;padding:7px 12px}.account-info{font-size:14px}}
@media(max-width:760px){body:has(.player-page) .topbar{display:none}.player-header{top:0}.video-column{top:63px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
.site-footer{display:flex;justify-content:center;align-items:center;gap:18px;min-height:58px;padding:14px 20px;border-top:1px solid var(--line);background:var(--paper);color:var(--muted);font-size:13px}.site-footer a:empty{display:none}.site-footer a:hover{color:var(--blue)}body:has(.player-page) .site-footer{display:none}
.auth-topbar{position:relative}.auth-page{min-height:calc(100vh - 82px);display:grid;grid-template-columns:1.1fr .9fr;align-items:center;gap:7vw;padding:7vh 10vw;background:radial-gradient(circle at 15% 25%,#dceaff,transparent 35%),linear-gradient(135deg,#f8fbff,#eff5ff)}.auth-copy{max-width:650px}.auth-kicker{color:var(--blue);font-weight:750;letter-spacing:.18em}.auth-copy h1{font-size:clamp(45px,6vw,82px);line-height:1.05;letter-spacing:-.045em;margin:22px 0}.auth-copy p{font-size:19px;line-height:1.8;color:#60728e}.auth-points{display:flex;gap:24px;margin-top:32px;color:#34557f;font-weight:650}.auth-card{max-width:470px;width:100%;padding:36px;border-radius:28px}.auth-card h2{font-size:27px}.auth-submit{width:100%;margin:6px 0 15px;padding:13px}.admin-shell{max-width:1180px;margin:35px auto;padding:0 20px}.admin-card{max-width:550px;margin:0 auto 25px}.admin-actions{display:flex;gap:12px;align-items:center}.button-link{display:inline-block;border:1px solid var(--line);border-radius:12px;padding:9px 15px}.admin-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.admin-shell textarea{width:100%;background:var(--bg);color:var(--text);border:1px solid var(--line);border-radius:14px;padding:14px;font:16px/1.6 ui-monospace,monospace;margin:15px 0}.table-wrap{overflow:auto;margin-top:18px}table{border-collapse:collapse;width:100%}th,td{text-align:left;padding:13px;border-bottom:1px solid var(--line);white-space:nowrap}th{color:var(--muted)}
@media(max-width:760px){.auth-page{display:block;padding:45px 18px;min-height:calc(100vh - 64px)}.auth-copy{text-align:center}.auth-copy h1{font-size:42px;margin:16px 0}.auth-copy p{font-size:16px}.auth-points{justify-content:center;gap:10px;font-size:14px;margin:20px 0 28px}.auth-card{padding:24px}.admin-grid{grid-template-columns:1fr}.admin-shell{margin-top:15px}.admin-card{padding:22px}}