:root,html[data-theme="dark"],html:not([data-theme]){--unified-bg:#fef9e8;--unified-surface:#fff9ea;--unified-panel:#fef1cc;--unified-wash:#fde8ad;--unified-ink:#191f20;--unified-muted:#4c5456;--unified-action:#153c46;--unified-on-action:#fff;--unified-border:#e9dfc5;--unified-control:#807754;--unified-error:#9b2624;--unified-ok:#315a3a;--paper:var(--unified-bg);--paper-2:var(--unified-surface);--paper-3:var(--unified-panel);--ink:var(--unified-ink);--ink-2:var(--unified-muted);--ink-3:var(--unified-muted);--line:var(--unified-border);--accent:var(--unified-action);--accent-soft:var(--unified-panel);--seal:var(--unified-action);--seal-soft:var(--unified-panel);--gold:var(--unified-action);--ok:var(--unified-ok);--ok-soft:var(--unified-panel);--shadow:none;--radius:6px;--serif:"ExtHan","Songti SC","STSong",serif;--brush:var(--serif);--ghibli-bg:var(--unified-bg);--ghibli-primary:var(--unified-action);--ghibli-primary-dark:var(--unified-action);--ghibli-text:var(--unified-ink);--ghibli-text-light:var(--unified-muted);--ghibli-border-color:var(--unified-border);--ghibli-error-text:var(--unified-error);--ghibli-accent1:var(--unified-panel);--ghibli-accent2:var(--unified-wash);--ghibli-footer-bg:var(--unified-panel);--ghibli-shadow:none;--font-primary:system-ui,-apple-system,"PingFang SC",sans-serif}
/* Paper, mango and iris: services/pulse/OPERATIONS.md; RDFZ Blog app.css. */
:root{--unified-bg:#fffdf6;--unified-surface:#fff;--unified-panel:#fdf3cf;--unified-wash:#f2ebf6;--unified-ink:#1b1720;--unified-muted:#574d5f;--unified-action:#3a2a45;--unified-on-action:#fff;--unified-border:#e7e0d3;--unified-highlight:#fadc5e;--unified-on-highlight:#1b1720;--sidebar-width:208px;--page-gutter:clamp(24px,4vw,64px)}
*{box-sizing:border-box}body{margin:0;padding:0;background:var(--unified-bg);background-image:none;color:var(--unified-ink);font:15px/1.65 system-ui,-apple-system,"PingFang SC",sans-serif;height:auto;overflow:visible}button,input,select,textarea{font:inherit;color:inherit}button,a,input,select,textarea{touch-action:manipulation}button{min-height:44px;cursor:pointer}button:disabled{cursor:not-allowed}a{color:var(--unified-action);text-underline-offset:4px}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid var(--unified-action);outline-offset:3px}[hidden]{display:none!important}.legacy-decoration,.legacy-footer,.topbar,.theme-btn{display:none!important}
.unified-sidebar{position:fixed;inset:0 auto 0 0;width:var(--sidebar-width);z-index:25;padding:32px 20px;background:var(--unified-surface);border-right:1px solid var(--unified-border);display:flex;flex-direction:column}.unified-brand{padding:0 16px;text-decoration:none;font:650 30px/1.4 var(--serif);letter-spacing:.12em;color:var(--unified-ink)}.unified-brand small{display:block;margin-top:5px;font:12px/1.6 system-ui;letter-spacing:.04em;color:var(--unified-muted)}.unified-sidebar nav{display:grid;gap:6px;margin-top:42px}.unified-sidebar nav a{display:flex;align-items:center;padding:12px 16px;color:var(--unified-muted);text-decoration:none;border-radius:7px}.unified-sidebar nav a:hover{background:var(--unified-wash)}.unified-sidebar nav a[aria-current]{background:var(--unified-panel);color:var(--unified-ink);font-weight:650;box-shadow:inset 3px 0 var(--unified-highlight)}.unified-sidebar>p{margin-top:auto;padding:32px 16px 0;font-size:12px;color:var(--unified-muted)}.unified-legacy{padding:0 16px;font-size:12px;color:var(--unified-muted)}
.unified-topbar{position:relative;inset:auto;margin-left:var(--sidebar-width);width:auto;min-height:68px;padding:10px var(--page-gutter);display:flex;align-items:center;justify-content:space-between;gap:16px;border-bottom:1px solid var(--unified-border);background:var(--unified-bg);box-shadow:none;color:var(--unified-muted);font-size:13px;height:auto}.unified-topbar>div{display:flex;gap:22px;align-items:center}.unified-topbar button{background:none;border:0;padding:4px;color:var(--unified-muted)}.unified-topbar a{text-decoration:none}.mobile-wordmark,.unified-mobile-nav{display:none}.skip-link{position:fixed;top:-100px;left:220px;padding:12px;background:var(--unified-surface);z-index:100}.skip-link:focus{top:10px}
#view,#assessment-main{width:auto;max-width:1280px;margin:0 0 0 var(--sidebar-width);padding:36px var(--page-gutter) 120px;min-width:0}.unified-heading{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:26px}.unified-heading h1{margin:0;font:650 30px/1.35 system-ui;letter-spacing:-.03em}.unified-heading p{margin:8px 0 0;color:var(--unified-muted);max-width:46em}.unified-heading>a{flex-shrink:0;font-size:13px;text-decoration:none;padding:10px 14px;border:1px solid var(--unified-border);border-radius:6px}.unified-kicker{font:12px/1.5 system-ui;color:var(--unified-muted);margin-bottom:10px}.unified-button{display:inline-flex;align-items:center;justify-content:center;min-height:44px;text-decoration:none;border:1px solid var(--unified-control);border-radius:6px;padding:9px 16px;background:var(--unified-surface);color:var(--unified-action);line-height:1.5;text-align:center}.unified-primary{background:var(--unified-highlight)!important;color:var(--unified-on-highlight)!important;border:1px solid var(--unified-control);font-weight:600;border-radius:6px;padding:10px 16px}.unified-actions{display:flex;flex-wrap:wrap;gap:10px;align-items:center}.unified-stats{display:flex;gap:48px;margin:24px 0 30px;padding:18px 0;border-block:1px solid var(--unified-border)}.unified-stats strong{display:block;font-size:25px;font-weight:600;line-height:1.4;font-variant-numeric:tabular-nums}.unified-stats strong small{font-size:13px;color:var(--unified-muted);font-weight:400}.unified-stats span{font-size:12px;color:var(--unified-muted)}
.unified-study{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(235px,1fr);gap:36px;align-items:start}.unified-continue{padding:26px 30px;background:var(--unified-surface);border:1px solid var(--unified-border);border-radius:9px}.unified-continue h2{font:600 30px/1.4 var(--serif);margin:0 0 6px}.unified-continue>p{font-size:13px;color:var(--unified-muted);margin:0}.unified-continue blockquote{margin:22px 0 26px;padding:0;border:0;font:21px/1.9 var(--serif);color:var(--unified-ink)}.unified-study aside h2{font-size:17px;margin:2px 0 8px}.unified-study aside p{font-size:13px;color:var(--unified-muted);margin:0}.unified-list{margin:16px 0;padding:0;list-style:none}.unified-list li{padding:15px 0;border-bottom:1px solid var(--unified-border);display:flex;align-items:center;justify-content:space-between;gap:20px;min-width:0}.unified-list a{text-decoration:none}.unified-list small{display:block;margin-bottom:4px;color:var(--unified-muted);font-size:12px}.unified-list button{background:none;border:0;padding:0;color:var(--unified-action);text-align:left;line-height:1.8;min-width:0}.unified-list li>div{min-width:0;overflow-wrap:anywhere}.unified-list li>span{flex-shrink:0;font-size:13px}.unified-filters{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0}.unified-filters button{border:1px solid var(--unified-border);background:var(--unified-surface);padding:7px 16px;border-radius:6px;color:var(--unified-muted);font-size:13px}.unified-filters button[aria-pressed=true]{background:var(--unified-wash);border-color:var(--unified-control);color:var(--unified-action);font-weight:600}.unified-source{font-size:13px;color:var(--unified-muted);padding:12px 0;border-bottom:1px solid var(--unified-border)}.unified-table-wrap{overflow:auto}.unified-table{border-collapse:collapse;width:100%}.unified-table th,.unified-table td{padding:14px 12px;border-bottom:1px solid var(--unified-border);text-align:left}.unified-table th{font-size:12px;color:var(--unified-muted);font-weight:500}.unified-table td:last-child{text-align:right;font-variant-numeric:tabular-nums}.unified-empty{padding:28px 0;color:var(--unified-muted)}.unified-date{display:flex;align-items:center;gap:12px;font-size:13px}.unified-date input{border:1px solid var(--unified-control);border-radius:6px;background:var(--unified-surface);padding:8px}
.home-search{width:100%;border:1px solid var(--unified-control);border-radius:6px;background:var(--unified-surface);padding:13px 16px;font:inherit}.sect-head{margin-top:30px}.sect-head h2{font:600 17px system-ui}.piece-grid{display:block}.piece-card,.piece-card.not_started,.piece-card.in_progress,.piece-card.completed{width:100%;display:grid;grid-template-columns:40px minmax(0,1fr) minmax(140px,.85fr) 80px;align-items:center;gap:16px;border:0;border-bottom:1px solid var(--unified-border);padding:18px 8px;border-radius:0;background:transparent;box-shadow:none;text-align:left}.piece-card:hover{background:var(--unified-panel);transform:none;box-shadow:none}.piece-card .pc-title{font:600 20px/1.5 var(--serif);min-width:0}.piece-card .pc-meta{font:12px/1.8 system-ui;color:var(--unified-muted);display:flex;flex-wrap:wrap;gap:4px 8px}.piece-card .pc-state,.piece-card .pc-seal{position:static;display:grid;place-items:center;font-size:12px;width:34px;height:34px;border-radius:50%;line-height:1;letter-spacing:0}.piece-card .pc-state.not_started{color:var(--unified-muted);background:var(--unified-surface)}.pc-dots{justify-content:end;margin:0}.pc-hit{grid-column:2/-1;grid-row:2;margin:0}.pc-badge{font-size:10px;white-space:nowrap}
.piece-top{border-bottom:1px solid var(--unified-border);padding:0 0 20px;gap:16px}.piece-top h1{font:600 30px/1.4 var(--serif)}.piece-top p{margin-top:6px}.piece-journey{margin-block:20px}.mode-tabs{display:flex;gap:12px;border-bottom:1px solid var(--unified-border);background:none;padding:0;border-radius:0}.mode-tabs button{border:0;border-bottom:3px solid transparent;border-radius:0;background:none;box-shadow:none;padding:10px 18px;color:var(--unified-muted)}.mode-tabs button.on{border-color:var(--unified-action);color:var(--unified-action);background:none}.mode-tabs button.on .tab-dot{background:var(--unified-action)}.read-page{background:var(--unified-surface);padding:28px;border:1px solid var(--unified-border);border-radius:8px}.read-para{font:22px/2.1 var(--serif)}.sync-ribbon{border:0;background:transparent;border-radius:0;margin:0 0 20px;padding:0;font-size:12px;color:var(--unified-muted)}.sync-ribbon i{background:transparent!important}.stage-card,.dict-intro,.exam-card{box-shadow:none;border-radius:8px}.footer-note{line-height:1.8}.ask-fab{right:22px;bottom:24px;background:var(--unified-action);color:var(--unified-on-action)}#unified-history section{padding:12px 0 20px;border-bottom:1px solid var(--unified-border)}#unified-history h3{font-size:17px}#view>h2{font-size:20px;margin-top:36px}
#unified-theme{max-width:620px;width:calc(100% - 32px);max-height:calc(100dvh - 40px);overflow:auto;padding:26px;background:var(--unified-surface);color:var(--unified-ink);border:1px solid var(--unified-control);border-radius:10px}#unified-theme::backdrop{background:#0006}.dialog-heading{display:flex;justify-content:space-between;align-items:center;gap:16px}.dialog-heading h2{font-size:21px;margin:0}.dialog-heading button{background:none;border:0;color:inherit;font-size:25px}.unified-palettes{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:9px}.unified-palettes button{display:flex;align-items:center;gap:8px;background:var(--unified-surface);border:1px solid var(--unified-border);border-radius:6px;padding:9px;color:var(--unified-ink);font-size:12px}.unified-palettes span{flex-shrink:0;width:22px;height:24px;border:1px solid var(--unified-control);border-radius:4px}.unified-palettes [aria-pressed=true],.unified-modes [aria-pressed=true]{outline:2px solid var(--unified-action);outline-offset:1px}.unified-modes{display:flex;flex-wrap:wrap;gap:12px;margin-top:25px}.unified-modes button{background:var(--unified-surface);border:1px solid var(--unified-border);border-radius:6px;padding:8px 12px;color:inherit}.subtle{font-size:12px;color:var(--unified-muted)}.unified-notice{position:fixed;right:20px;bottom:100px;z-index:95;max-width:calc(100% - 40px);background:var(--unified-action);color:var(--unified-on-action);padding:15px;border-radius:6px}
#assessment-main .page-container{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(240px,1fr);gap:32px;height:auto;max-width:none;margin:0;padding:0;background:none;box-shadow:none;overflow:visible}#assessment-main .left-column,#assessment-main .right-column{width:auto;min-width:0;max-height:none;overflow:visible;padding:0;background:none;border:0;box-shadow:none}#assessment-main h1{font:650 30px/1.4 system-ui;text-align:left;margin:0 0 12px;color:var(--unified-ink)}#assessment-main h2{font:600 20px/1.4 system-ui;color:var(--unified-ink)}#assessment-main .account-panel,#assessment-main #leaderboard-panel{box-shadow:none;border:1px solid var(--unified-border);border-radius:8px;background:var(--unified-surface);padding:20px}#assessment-main .hero-quote{font-style:normal;text-align:left}#assessment-main button{border-radius:6px;box-shadow:none}#assessment-main .button-group{display:flex;flex-wrap:wrap;gap:12px}#assessment-main .button-group button{flex:1;background:var(--unified-highlight);color:var(--unified-on-highlight);min-width:140px}#assessment-main .leaderboard-tabs{display:flex;gap:6px}#assessment-main .leaderboard-tab{min-width:0;padding:8px 12px}#assessment-main #question-list{overflow-wrap:anywhere}#assessment-main #image-preview{max-width:100%;height:auto}#assessment-main input[type=file]{max-width:100%}#assessment-main #questions,#assessment-main #upload-section{background:var(--unified-surface);border:1px solid var(--unified-border);box-shadow:none;border-radius:8px}
@media(min-width:1550px){#view,#assessment-main{margin-left:calc(var(--sidebar-width) + (100vw - var(--sidebar-width) - 1280px)/2)}}
@media(max-width:1100px){:root{--sidebar-width:176px;--page-gutter:28px}.unified-sidebar{padding:28px 14px}.unified-brand{font-size:28px;padding:0 12px}.unified-brand small{font-size:11px}.unified-study{gap:26px}.piece-card{grid-template-columns:34px minmax(0,1fr) minmax(130px,.75fr)}.pc-dots{display:none}#assessment-main .page-container{grid-template-columns:1fr}.unified-study{grid-template-columns:1fr}.unified-study aside{padding-top:8px}.unified-study aside .unified-list{margin-top:4px}}
@media(max-width:760px){:root{--sidebar-width:0px;--page-gutter:22px}.unified-sidebar{display:none}.unified-topbar{margin:0;min-height:64px;padding:8px 22px}.unified-topbar>span{display:none}.unified-topbar>div{gap:18px}.unified-topbar .unified-account-status{display:none}.mobile-wordmark{display:block;font:600 26px var(--serif);letter-spacing:.08em;color:var(--unified-ink)}#view,#assessment-main{margin:0;padding:26px 22px 150px}.unified-heading{display:block;margin-bottom:22px}.unified-heading h1{font-size:26px}.unified-heading p{font-size:13px}.unified-heading>a{display:inline-block;margin-top:14px}.unified-study{gap:28px}.unified-continue{padding:22px}.unified-continue h2{font-size:28px}.unified-continue blockquote{font-size:20px;margin:18px 0 22px}.unified-stats{gap:36px;padding:16px 0;margin:20px 0 24px}.unified-stats strong{font-size:23px}.piece-card,.piece-card.not_started,.piece-card.in_progress,.piece-card.completed{grid-template-columns:30px minmax(0,1fr);padding:16px 0;gap:4px 12px}.piece-card .pc-title{font-size:20px}.piece-card .pc-state,.piece-card .pc-seal{grid-row:1/3;width:28px;height:28px;font-size:11px}.piece-card .pc-meta{grid-column:2;line-height:1.6}.pc-hit{grid-column:2;grid-row:auto}.piece-top h1{font-size:25px}.mode-tabs{gap:4px}.mode-tabs button{padding:10px 12px;flex:1}.read-page{padding:20px 14px}.read-para{font-size:21px;line-height:2.1}.unified-mobile-nav{position:fixed;inset:auto 0 0;z-index:35;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));padding:8px 10px max(8px,env(safe-area-inset-bottom));border-top:1px solid var(--unified-border);background:var(--unified-surface)}.unified-mobile-nav a{min-height:46px;display:flex;align-items:center;justify-content:center;padding:8px 2px;font-size:13px;color:var(--unified-muted);text-decoration:none;border-radius:6px}.unified-mobile-nav a[aria-current]{background:var(--unified-panel);color:var(--unified-ink);font-weight:600}.ask-fab{bottom:88px;right:18px}.skip-link{left:20px}.unified-palettes{grid-template-columns:repeat(2,minmax(0,1fr))}#unified-theme{padding:20px}.unified-modes{gap:8px}.unified-list li{gap:12px}.unified-filters{gap:6px}.unified-filters button{padding:7px 12px}#assessment-main h1{font-size:26px}#assessment-main .page-container{gap:26px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;animation:none!important;transition:none!important}}
/* Existing account and durable-work controls share the page's safe areas. */
.unified-sidebar{padding-bottom:82px}body[data-learning-surface=recite] #view{padding-bottom:32px}.learning-recovery{max-width:calc(1280px - 2 * var(--page-gutter));margin:20px var(--page-gutter) 20px calc(var(--sidebar-width) + var(--page-gutter));padding:16px 0;border:0;border-top:1px solid var(--unified-border);border-radius:0;color:var(--unified-muted);font-size:13px}.learning-recovery summary{cursor:pointer;min-height:32px}.learning-record-status{position:relative;inset:auto;transform:none;max-width:none;width:auto;margin:0 var(--page-gutter) 100px calc(var(--sidebar-width) + var(--page-gutter));padding:0;border:0;background:transparent;text-align:left;color:var(--unified-muted);font-size:12px}.learning-record-status:has(button){border:1px solid var(--unified-control);background:var(--unified-panel);padding:12px;border-radius:6px}.learning-recovery:empty{display:none}
@media(min-width:1550px){.learning-recovery,.learning-record-status{margin-left:calc(var(--sidebar-width) + (100vw - var(--sidebar-width) - 1280px)/2 + var(--page-gutter));margin-right:calc((100vw - var(--sidebar-width) - 1280px)/2 + var(--page-gutter))}}
@media(max-width:760px){.learning-recovery{margin:20px 22px}.learning-record-status{margin:0 22px 150px}}
.btn.primary,.chat-send,.chat-head .ch-seal,.mic-btn.recording{background:var(--unified-action);color:var(--unified-on-action)}.btn{border-radius:6px}.ask-fab{transform:none;border-radius:50%;box-shadow:none}.read-page{max-width:960px;margin-inline:auto}.read-hint{max-width:960px;margin-inline:auto}

/* In-flow My navigation and progress use the same measured learning state as the library. */
#unified-account-slot{display:inline-flex;align-items:center;width:40px;height:40px;flex-shrink:0}.unified-topbar>div{align-items:center}.unified-account-status{font-size:12px;white-space:nowrap}.unified-progress{margin:24px 0 30px;padding:22px 0;border-block:1px solid var(--unified-border)}.unified-progress-heading{display:flex;align-items:center;justify-content:space-between;gap:20px}.unified-progress h2,.unified-recent h2{font-size:17px;margin:0}.unified-progress-heading p{font-size:12px;color:var(--unified-muted);margin:6px 0 0}.unified-progress-heading>strong{font-size:36px;font-weight:600;font-variant-numeric:tabular-nums}.unified-progress-heading strong small{font-size:16px;margin-left:4px}.unified-progress-bar{display:block;width:100%;height:8px;margin:18px 0;border:0;border-radius:20px;overflow:hidden;appearance:none;background:var(--unified-border);color:var(--unified-action)}.unified-progress-bar::-webkit-progress-bar{background:var(--unified-border);border-radius:20px}.unified-progress-bar::-webkit-progress-value{background:var(--unified-action);border-radius:20px}.unified-progress-bar::-moz-progress-bar{background:var(--unified-action);border-radius:20px}.unified-progress-counts{display:flex;gap:28px;font-size:12px;color:var(--unified-muted)}.unified-progress-counts b{color:var(--unified-ink);font-size:16px;margin-right:4px}.unified-recent{margin-top:32px}.unified-recent ul{list-style:none;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:0 28px}.unified-recent li{border-bottom:1px solid var(--unified-border)}.unified-recent button{width:100%;display:grid;grid-template-columns:1fr auto;gap:8px;border:0;background:none;color:var(--unified-ink);padding:18px 0;text-align:left}.unified-recent button>span{font:19px var(--serif)}.unified-recent small{color:var(--unified-muted);font-variant-numeric:tabular-nums}.unified-recent progress{grid-column:1/-1;height:5px;margin:5px 0 0}.unified-recent a{font-size:12px}
@media(max-width:760px){.unified-topbar>div{gap:14px}.unified-progress{margin:20px 0 24px;padding:18px 0}.unified-progress-counts{gap:20px}.unified-progress-heading>strong{font-size:32px}.unified-recent ul{grid-template-columns:1fr}}

/* Reserve the async shell before its module and My session finish loading. */
:root{--unified-header-height:68px}html{scrollbar-gutter:stable}#unified-shell{min-height:var(--unified-header-height);overflow-anchor:none}.unified-topbar{height:var(--unified-header-height);min-height:var(--unified-header-height)}#unified-account-status{flex:0 0 6em;inline-size:6em;text-align:right}body[data-learning-surface=recite] #view{min-height:calc(100svh - var(--unified-header-height))}
@media(max-width:760px){:root{--unified-header-height:64px}}