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0;display:grid}.bars-wrap{position:relative}.bars>div{flex-direction:column;justify-content:end;align-items:center;gap:7px;height:100%;display:flex}.bars i{background:linear-gradient(var(--accent-grad-a),var(--accent-grad-b));border-radius:8px 8px 4px 4px;width:100%;max-width:23px;min-height:10px;display:block}.bars span{color:var(--muted-3);font-size:9px}.curve-wrap{width:100%;height:150px;margin:10px 0 4px;position:relative}.chart-tip{z-index:3;background:var(--toast);color:#fff;text-align:center;pointer-events:none;white-space:nowrap;border-radius:9px;padding:6px 9px;position:absolute;transform:translate(-50%,calc(-100% - 9px));box-shadow:0 8px 20px #24263838}.chart-tip b{font-size:13px;display:block}.chart-tip small{opacity:.78;margin-top:1px;font-size:9px;display:block}.chart-tip:after{content:"";border:5px solid #0000;border-top-color:var(--toast);position:absolute;top:100%;left:50%;transform:translate(-50%)}.curve-stats{color:var(--muted-2);flex-wrap:wrap;gap:16px;font-size:10px;display:flex}.curve-stats b{color:var(--accent-ink);letter-spacing:-.03em;font-size:15px;display:block}.heatmap{flex-direction:column;flex:1;justify-content:center;align-items:center;padding:10px 0 8px;display:flex;position:relative;overflow:visible}.heatmap-scroll{width:100%;padding-bottom:4px;overflow-x:auto}.heatmap-grid{grid-template-rows:repeat(7,1fr);grid-auto-columns:1fr;grid-auto-flow:column;justify-content:center;gap:4px;width:100%;display:grid}.hm-tip{z-index:3;background:var(--toast);color:#fff;text-align:center;pointer-events:none;white-space:nowrap;border-radius:9px;padding:6px 9px;position:absolute;transform:translate(-50%,-120%);box-shadow:0 8px 20px #24263838}.hm-tip b{font-size:11px;display:block}.hm-tip small{opacity:.78;margin-top:1px;font-size:9px;display:block}.hm-tip:after{content:"";border:5px solid #0000;border-top-color:var(--toast);position:absolute;top:100%;left:50%;transform:translate(-50%)}.month-card{margin-top:14px}.lv-badge{letter-spacing:.02em;white-space:nowrap;border-radius:7px;padding:3px 7px;font-size:9px;font-weight:800}.lv-badge.lv0{background:var(--border-soft);color:var(--muted)}.lv-badge.lv1{background:var(--orange-soft);color:var(--orange-ink)}.lv-badge.lv2{background:var(--green-soft);color:var(--green-ink)}.lv-badge.lv3{background:var(--accent-soft);color:var(--accent-ink)}.lv-pill{background:var(--orange-soft);color:var(--orange-ink);border-radius:6px;padding:2px 6px;font-size:9px;font-weight:800}.snooze-row{flex-wrap:wrap;align-items:center;gap:6px;margin-top:9px;display:flex}.snooze-row span{opacity:.75;font-size:9.5px;font-weight:700}.snooze-row button{color:inherit;background:0 0;border:1px solid;border-radius:99px;padding:3px 9px;font-size:10px;font-weight:700;transition:background .15s}.snooze-row button:hover{background:var(--surface)}.checkin-card{background:var(--surface-card);border:1px solid var(--border);text-align:center;border-radius:25px;padding:44px 30px;box-shadow:0 24px 50px #3430680f}.checkin-ring{background:linear-gradient(145deg,var(--accent-bright),var(--accent-deep));color:#fff;width:64px;height:64px;box-shadow:0 12px 26px var(--accent-shadow);border-radius:50%;place-items:center;margin:0 auto 18px;display:grid}.checkin-card h3{letter-spacing:-.03em;margin:0 0 8px;font-size:20px}.checkin-card p{color:var(--muted);margin:0;font-size:12px}.checkin-btn{height:42px;margin:22px auto 0;font-size:13px}.checked-in{background:var(--green-soft);color:var(--green-ink);border-radius:11px;align-items:center;gap:6px;margin-top:18px;padding:9px 14px;font-size:12px;font-weight:700;display:inline-flex}.checkin-sub{color:var(--muted-2)!important;margin-top:14px!important;font-size:10px!important}.session-end{text-align:center;color:var(--muted);flex-direction:column;align-items:center;padding:44px 20px;display:flex}.session-end h3{color:var(--text-strong);margin:10px 0 6px;font-size:17px}.session-end p{margin:0 0 18px;font-size:12px}.session-end .primary{height:40px;padding:0 24px}.primary:disabled{opacity:.5;cursor:not-allowed;box-shadow:none;filter:saturate(.7)}.ratio-box{color:var(--muted);align-items:center;gap:8px;font-size:10px;font-weight:700;display:flex}.ratio-box input[type=range]{width:110px;accent-color:var(--accent)}.ratio-box span{white-space:nowrap}.hm-cell{aspect-ratio:1;background:var(--border-soft);border-radius:3.5px;width:100%;min-width:0;height:auto}.hm-cell.l1{background:color-mix(in srgb,var(--accent) 24%,var(--surface))}.hm-cell.l2{background:color-mix(in srgb,var(--accent) 46%,var(--surface))}.hm-cell.l3{background:color-mix(in srgb,var(--accent) 72%,var(--surface))}.hm-cell.l4{background:var(--accent)}.sheet-backdrop{z-index:40;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#1f1e3542;place-items:center;padding:18px;display:grid;position:fixed;inset:0}.account-sheet{background:color-mix(in srgb,var(--surface) 95%,transparent);border:1px solid var(--surface);border-radius:24px;width:min(440px,100%);max-height:calc(100dvh - 36px);padding:25px;overflow-y:auto;box-shadow:0 30px 70px #1d1b443d}.account-sheet header{justify-content:space-between;align-items:flex-start;display:flex}.account-sheet h2{letter-spacing:-.04em;margin:0;font-size:20px}.close-sheet{background:var(--border-soft);width:32px;height:32px;color:var(--muted);border-radius:10px;place-items:center;display:grid}.sheet-intro{color:var(--muted);margin:20px 0 15px;font-size:12px;line-height:1.6}.account-sheet label{border:1px solid var(--border);height:43px;color:var(--muted-4);border-radius:11px;align-items:center;gap:9px;margin-top:9px;padding:0 11px;display:flex}.account-sheet input{width:100%;color:var(--text);background:0 0;border:0;outline:0;font-size:12px}.auth-actions{gap:9px;margin-top:16px;display:flex}.auth-actions .primary{height:39px}.account-status{min-height:17px;color:var(--red-ink);margin:12px 0 0;font-size:11px}.account-status.visible{color:var(--text-soft)}.setup-hint{background:var(--accent-soft);color:var(--accent-ink);border-radius:12px;gap:9px;margin-top:12px;padding:12px;font-size:10px;line-height:1.55;display:flex}.setup-hint svg{flex:none;margin-top:2px}.setup-hint strong{font-size:11px}.setup-hint p{margin:3px 0 0}.setup-hint code{background:var(--surface);border-radius:4px;padding:1px 4px;font-family:ui-monospace,monospace}.dl-guide{width:min(520px,100%)}.dl-steps{counter-reset:dl;gap:9px;margin:18px 0 0;padding:0;list-style:none;display:grid}.dl-steps li{border:1px solid var(--border-2);background:var(--surface-soft);color:var(--text-soft);counter-increment:dl;border-radius:13px;padding:11px 12px 11px 42px;font-size:11.5px;line-height:1.6;position:relative}.dl-steps li:before{content:counter(dl);background:var(--accent);color:#fff;border-radius:7px;place-items:center;width:19px;height:19px;font-size:10px;font-weight:800;display:grid;position:absolute;top:11px;left:13px}.dl-steps b{color:var(--text-strong)}.dl-steps em{color:var(--accent-ink);font-style:normal;font-weight:700}.dl-sources{gap:9px;margin-top:16px;display:grid}.dl-sources a{border:1px solid var(--border-2);color:inherit;border-radius:14px;align-items:center;gap:11px;padding:12px;text-decoration:none;transition:border-color .2s,transform .15s;display:flex}.dl-sources a:hover{border-color:var(--accent);transform:translateY(-1px)}.dl-ic{background:var(--accent-soft);width:35px;height:35px;color:var(--accent-ink);border-radius:11px;flex:none;place-items:center;display:grid}.dl-sources a>svg{color:var(--muted-3);flex:none;margin-left:auto}.dl-sources strong{font-size:12px;display:block}.dl-sources p{color:var(--muted-2);margin:3px 0 0;font-size:10px;line-height:1.55}.dl-template{width:100%;height:41px;margin-top:17px}.dl-format{color:var(--muted-2);margin:12px 0 0;font-size:10px;line-height:1.7}.dl-format code{background:var(--border-soft);color:var(--accent-ink);border-radius:5px;padding:1px 5px;font-family:ui-monospace,monospace}.mobile-keyboard{z-index:25;background:color-mix(in srgb,var(--surface) 55%,transparent);-webkit-backdrop-filter:blur(36px)saturate(200%);backdrop-filter:blur(36px)saturate(200%);border-top:1px solid color-mix(in srgb,#fff 32%,var(--border-2));max-width:620px;padding:9px 9px calc(10px + env(safe-area-inset-bottom));will-change:transform,opacity;margin:0 auto;position:fixed;bottom:0;left:0;right:0;box-shadow:0 -16px 46px #18163a2e}.mobile-keyboard.kb-solid{background:var(--surface);-webkit-backdrop-filter:none;backdrop-filter:none}.mk-toolbar{justify-content:flex-end;gap:6px;padding:0 1px 7px;display:flex}.mk-dismiss{background:color-mix(in srgb,var(--surface) 55%,transparent);height:24px;color:var(--muted-2);letter-spacing:.02em;border:1px solid #0000000f;border-radius:99px;align-items:center;gap:3px;padding:0 9px;font-size:10px;font-weight:700;transition:transform .12s,color .15s;display:inline-flex}.mk-dismiss:active{transform:scale(.92)}.mk-panel{border:1px solid var(--border-2);background:color-mix(in srgb,var(--surface) 82%,#d9d9e6);border-radius:15px;margin-bottom:8px;padding:10px 12px;overflow:hidden;box-shadow:0 6px 22px #1414281f}.mk-panel-head{align-items:baseline;gap:8px;margin-bottom:9px;display:flex}.mk-panel-head strong{color:var(--text-strong);font-size:12px}.mk-panel-head span{color:var(--muted-2);font-size:9.5px}.mk-panel-row{justify-content:space-between;align-items:center;gap:10px;min-height:30px;display:flex}.mk-panel-row>span{color:var(--text-soft);font-size:11px;font-weight:600}.mk-height{flex:1;align-items:center;gap:8px;max-width:200px;display:flex}.mk-height input[type=range]{accent-color:var(--accent);flex:1;height:22px}.mk-height b{color:var(--muted);text-align:right;min-width:30px;font-size:10px}.mk-row{gap:6px;margin-bottom:7px;display:flex}.mk-key{height:var(--kb-key-h,46px);background:color-mix(in srgb,var(--surface) 74%,#d9d9e6);color:var(--text);touch-action:manipulation;-webkit-user-select:none;user-select:none;border:1px solid #0000000d;border-radius:11px;flex:1;place-items:center;font-size:18px;font-weight:600;transition:transform 70ms cubic-bezier(.2,.8,.2,1),filter 80ms,box-shadow 70ms;display:grid;box-shadow:0 1px #00000014,0 4px 10px #14142817}.mk-key:active{filter:brightness(.93);transform:scale(.93);box-shadow:0 1px 2px #14142824}.mk-key.on{background:var(--accent-soft);color:var(--accent-ink);border-color:#0000}.mk-bottom{margin-top:3px}.mk-mod{color:var(--muted-2);flex:1.5;font-size:19px}.mk-space{background:color-mix(in srgb,var(--surface) 88%,#d9d9e6);flex:4}.mk-return{background:var(--accent);color:#fff;box-shadow:0 3px 12px var(--accent-shadow);flex:1.8;font-size:13px;font-weight:700}:root[data-theme=dark] .mk-key{background:color-mix(in srgb,var(--surface) 58%,#000);color:var(--text);box-shadow:0 1px #0006,0 4px 10px #00000047}:root[data-theme=dark] .mk-key:active{box-shadow:0 1px 2px #0006}:root[data-theme=dark] .mk-space{background:color-mix(in srgb,var(--surface) 76%,#000)}:root[data-theme=dark] .mk-panel{background:color-mix(in srgb,var(--surface) 82%,#000)}:root[data-theme=dark] .mobile-keyboard{box-shadow:0 -16px 46px #0006}.app:has(.mobile-keyboard) .content{padding-bottom:calc(300px + (var(--kb-key-h,46px) - 46px) * 4)}.boot{z-index:99;text-align:center;background:radial-gradient(120% 120% at 50% 0%,color-mix(in srgb,var(--accent) 14%,var(--bg)) 0%,var(--bg) 58%);will-change:opacity,transform;flex-direction:column;justify-content:center;align-items:center;gap:0;transition:opacity .32s,transform .32s;display:flex;position:fixed;inset:0}.boot.leaving{opacity:0;transform:scale(1.03)}.boot .brand-icon{filter:drop-shadow(0 14px 34px color-mix(in srgb,var(--accent) 45%,transparent));animation:3.2s ease-in-out infinite boot-breathe}@keyframes boot-breathe{0%,to{transform:translateY(0)scale(1)}50%{transform:translateY(-6px)scale(1.03)}}.boot h1{letter-spacing:-.02em;color:var(--text-strong);margin:20px 0 0;font-size:26px;font-weight:800}.boot-tag{color:var(--muted-2);letter-spacing:.1em;margin:7px 0 0;font-size:11.5px}.boot-track{background:var(--border-soft);border-radius:99px;width:min(240px,64vw);height:6px;margin-top:34px;overflow:hidden}.boot-track i{background:var(--accent);height:100%;box-shadow:0 0 14px var(--accent-shadow);border-radius:99px;transition:width .2s;display:block}.boot-msg{color:var(--muted);min-height:15px;margin-top:14px;font-size:11px}.boot-note{color:var(--accent);max-width:min(300px,78vw);margin-top:10px;font-size:11px;line-height:1.5}.boot-skip{border:1px solid var(--border-2);background:var(--surface-soft);color:var(--muted-2);border-radius:99px;margin-top:30px;padding:9px 18px;font-size:11px;font-weight:600;transition:transform .12s,color .15s,border-color .15s}.boot-skip:active{transform:scale(.94)}.boot-skip:hover{color:var(--text);border-color:var(--accent)}.signed-in{background:var(--accent-soft);border-radius:14px;align-items:center;gap:10px;margin-top:21px;padding:13px;display:flex}.user-orb{background:var(--accent);color:#fff;border-radius:12px;place-items:center;width:36px;height:36px;display:grid}.signed-in strong{font-size:12px}.signed-in p{color:var(--muted);margin:3px 0;font-size:10px}.signed-in button{color:var(--accent-ink);background:0 0;align-items:center;gap:4px;margin-left:auto;font-size:10px;font-weight:700;display:flex}.setting-list{gap:8px;margin-top:20px;display:grid}.setting-row{border:1px solid var(--border-2);background:var(--surface-soft);border-radius:14px;align-items:center;gap:11px;padding:12px;display:flex}.setting-row>svg{color:var(--accent);background:var(--accent-soft);box-sizing:content-box;border-radius:10px;flex:none;width:31px;height:31px;padding:7px}.setting-text{flex:1;min-width:0}.setting-text strong{letter-spacing:-.01em;font-size:12px;display:block}.setting-text span{color:var(--muted-2);margin-top:3px;font-size:9.5px;line-height:1.5;display:block}.toggle{background:var(--toggle-off);border-radius:99px;flex:none;width:38px;height:22px;padding:0;transition:background .2s;position:relative}.toggle i{background:#fff;border-radius:50%;width:16px;height:16px;transition:transform .2s;position:absolute;top:3px;left:3px;box-shadow:0 1px 3px #2426382b}.toggle.on{background:var(--accent)}.toggle.on i{transform:translate(16px)}.segmented{background:var(--border-soft);border-radius:10px;flex:none;padding:3px;display:flex}.segmented button{color:var(--muted);white-space:nowrap;background:0 0;border-radius:8px;padding:6px 12px;font-size:10px;font-weight:700}.segmented button.sel{background:var(--surface);color:var(--accent);box-shadow:0 2px 6px #2a285a12}.swatches{flex-wrap:wrap;align-items:center;gap:7px;display:flex}.swatch{width:26px;height:26px;box-shadow:0 0 0 1px var(--border);border:2px solid #0000;border-radius:9px;position:relative}.swatch.sel{box-shadow:0 0 0 2px var(--text)}.swatch input{opacity:0;cursor:pointer;position:absolute;inset:0}.stepper{flex:none;align-items:center;gap:6px;display:flex}.stepper button{background:var(--border-soft);width:28px;height:28px;color:var(--accent-ink);border-radius:8px;place-items:center;display:grid}.stepper input{text-align:center;border:1px solid var(--border);width:44px;height:28px;color:var(--text);background:var(--surface);appearance:textfield;border-radius:8px;outline:none;font-size:13px;font-weight:700}.stepper input::-webkit-outer-spin-button{-webkit-appearance:none;margin:0}.stepper input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}.danger-zone{border-top:1px solid var(--border-2);margin-top:18px;padding-top:15px}.danger-zone button{background:var(--red-soft);color:var(--red);border-radius:10px;align-items:center;gap:6px;padding:9px 13px;font-size:10px;font-weight:700;display:flex}.mobile-nav{display:none}:root[data-theme=dark]{--bg:#10101a;--bg-deep:#12131f;--bg-glow:#1d1c36;--surface:#1a1b2b;--surface-soft:#20213a;--surface-glass:#141522d1;--surface-card:#191a29eb;--surface-daily:#191a2999;--text:#e9e9f4;--text-strong:#f0f1fb;--text-soft:#c3c6d8;--muted:#9a9eb5;--muted-2:#83879e;--muted-3:#70748c;--muted-4:#8d91a6;--border:#2b2d45;--border-2:#26283c;--border-soft:#22233a;--line:color-mix(in srgb,var(--text) 26%,transparent);--toggle-off:#33354e;--green:#38d3a3;--green-ink:#57e0b4;--green-bright:#4cd5a8;--green-soft:color-mix(in srgb,#15936e 18%,var(--surface));--green-border:#1d4a3c;--red:#f08aa0;--red-ink:#ff9cb2;--red-bright:#ff9cb2;--red-soft:color-mix(in srgb,#e0587a 16%,var(--surface));--red-border:#4a2733;--orange:#ffa84f;--orange-ink:#ffb066;--orange-soft:color-mix(in srgb,#fa9b38 16%,var(--surface));--gold:#ffd46b;--gold-ink:#ffe7a6;--toast:#262739;--accent-ink:color-mix(in srgb,var(--accent) 78%,#fff);--accent-grad-b:color-mix(in srgb,var(--accent) 60%,#000);--accent-bright:color-mix(in srgb,var(--accent) 82%,#fff);--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}:root[data-theme=dark] .avatars i{border-color:var(--surface)}@media (width<=1080px){.app{grid-template-columns:210px minmax(560px,1fr)}.insight{display:none}.content{padding:38px 42px}}@media (width<=700px){.app{background:radial-gradient(circle at 48% 0,var(--bg-glow) 0,transparent 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8px var(--accent-shadow);border:1.5px solid color-mix(in srgb,var(--surface) 72%,transparent);border-radius:99px;place-items:center;padding:0 4px;font-size:9px;font-style:normal;font-weight:800;display:grid;position:absolute;top:1px;left:50%;transform:translate(11px)}.mobile-nav button.selected{color:#fff;background:linear-gradient(145deg,var(--accent-bright),var(--accent-deep));box-shadow:0 7px 16px var(--accent-shadow)}.app:has(.mobile-keyboard) .mobile-nav{display:none}.app:has(.mobile-keyboard) .content{padding-bottom:300px}.app:has(.mobile-keyboard) .lesson-card{margin-bottom:18px}.content{padding:22px 14px calc(104px + env(safe-area-inset-bottom))}.topbar{margin-bottom:22px}.topbar h1{font-size:22px}.date{display:none}.settings{width:36px;height:36px}.lesson-card{border-radius:20px;padding:24px 18px 19px}.lesson-card h2{font-size:22px}.cn-sentence{font-size:19px}.english-line{gap:6px;font-size:21px}.gap-input{min-width:52px;padding:2px 4px}.learn-mode{grid-template-columns:1fr 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