:root{--on-action:#fff;--action-bg:#303b67;--action-hover:#252d52;--accent-bg:#b34632;--on-accent:#fff;--success-soft:#e8f0e9;--danger-soft:#f6e5df;--ink-3:#696674;--control-disabled:#696674;--selection-bg:#d7dfef;color-scheme:light}
:root[data-theme=light]{--indigo:#174bc0;--indigo-deep:#123b96;--indigo-soft:#e9efff;--vermilion:#174bc0;--vermilion-deep:#123b96;--vermilion-soft:#e9efff;--paper:#f5f6f8;--paper-deep:#e7e9ef;--surface:#fff;--surface-strong:#fff;--ink:#20242d;--ink-2:#454c58;--ink-3:#626977;--border:#d2d6df;--border-strong:#8993a3;--danger:#b42e3d;--warning:#805014;--success:#216345;--action-bg:#174bc0;--action-hover:#123b96;--accent-bg:#174bc0;--shadow-soft:0 8px 26px #20242d08;--shadow-lift:0 12px 32px #20242d15}
:root[data-theme=dark]{color-scheme:dark;--indigo:#a9c4ff;--indigo-deep:#c9daff;--indigo-soft:#29354c;--vermilion:#ffb09c;--vermilion-deep:#ffd0c2;--vermilion-soft:#472f2a;--paper:#181b22;--paper-deep:#2b303b;--surface:#20252e;--surface-strong:#2b313d;--ink:#f0f2f7;--ink-2:#d0d5df;--ink-3:#acb5c4;--border:#424c5d;--border-strong:#737f91;--danger:#ffacb4;--warning:#f2c987;--success:#94d7b5;--success-soft:#213b30;--danger-soft:#432a32;--action-bg:#a9c4ff;--action-hover:#c9daff;--on-action:#142444;--accent-bg:#ffb09c;--on-accent:#381a12;--selection-bg:#425a83;--shadow-soft:0 8px 24px #0003;--shadow-lift:0 12px 36px #0006}
::selection{background:var(--selection-bg);color:var(--ink)}
input,textarea,select{color:var(--ink);background-color:var(--surface-strong);caret-color:var(--indigo)}
input::placeholder,textarea::placeholder{color:var(--ink-3);opacity:1}
:focus-visible{outline:2px solid var(--indigo);outline-offset:3px}
*{scrollbar-color:var(--border-strong) var(--paper)}
.btn-primary,.btn-act-primary,.review-tabs button.active,.spelling-keyboard button[data-key=enter]{background:var(--action-bg);color:var(--on-action)}
.btn-primary:hover,.btn-act-primary:hover{background:var(--action-hover);color:var(--on-action)}
.quiz-opt-btn.correct{background:var(--success-soft);color:var(--ink);border-color:var(--success)}
.quiz-opt-btn.wrong{background:var(--danger-soft);color:var(--ink);border-color:var(--danger)}
.quiz-opt-btn:disabled{opacity:1}.quiz-opt-btn:disabled:not(.correct):not(.wrong){color:var(--ink-2)}
button:disabled{cursor:default}
.theme-picker{border:0;padding:0;display:flex;flex-wrap:wrap;gap:10px;margin:20px 0}
.theme-picker legend{font-weight:700;margin-bottom:12px}.theme-picker button{display:grid;gap:8px;min-width:84px;padding:10px;border:2px solid var(--border);border-radius:10px;color:var(--ink);background:var(--surface)}
.theme-picker button[aria-pressed=true]{border-color:var(--indigo);font-weight:700}.theme-picker i{height:24px;border:1px solid var(--border);border-radius:4px;background:#f5f0e7}.theme-picker [data-theme-choice=light] i{background:#fff}.theme-picker [data-theme-choice=dark] i{background:#181b22}.theme-state{width:100%;font-size:13px;color:var(--ink-2);margin:0}
.appearance-settings{padding:20px}.appearance-settings h2{font-size:22px}.settings-back{display:inline-flex;align-items:center;min-height:44px;margin:8px 16px;color:var(--indigo)}
.personal-center,.training-topbar,.training-manual-next{display:none}
.personal-header svg{display:block;width:24px;height:24px;flex:none}
.personal-avatar svg{display:block;width:36px;height:36px;max-width:100%;max-height:100%}
.personal-panels{min-width:0}.personal-links h2{margin:0;font-size:15px;font-weight:700;line-height:1.5;color:var(--ink-2)}
@media(min-width:768px){
 .personal-home .personal-center{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;width:100%;max-width:1120px;margin:0 auto;padding:32px 24px}
 .personal-center>*{min-width:0}
 .personal-header{grid-column:1/-1;display:flex;align-items:center;justify-content:space-between;gap:20px}
 .personal-header h1{margin:0;font-size:30px;line-height:1.3}
 .personal-header>a{display:grid;place-items:center;width:44px;height:44px;flex:none;border:1px solid var(--border);border-radius:8px;background:var(--surface);color:var(--ink-2)}
 .personal-identity{grid-column:1/-1;display:flex;align-items:center;gap:20px;width:100%;min-width:0;padding:24px;text-align:left;font:inherit;color:var(--ink);background:var(--surface);border:1px solid var(--border);border-radius:12px}
 .personal-avatar{display:grid;place-items:center;width:72px;height:72px;flex:none;border-radius:50%;background:var(--indigo-soft);color:var(--indigo)}
 .personal-avatar svg{width:40px;height:40px}
 .personal-identity>span:nth-child(2){flex:1;min-width:0}
 .personal-identity strong{display:block;font-size:25px;line-height:1.4;overflow-wrap:anywhere}
 .personal-identity small{display:block;margin-top:6px;color:var(--ink-2);font-size:14px;line-height:1.5}
 .personal-identity>span:last-child{font-size:24px;color:var(--ink-3);flex:none}
 .personal-stats{display:flex;align-items:center;gap:24px;min-height:130px;padding:24px;border:1px solid var(--border);border-radius:12px;background:var(--surface);color:var(--ink)}
 .personal-stats>span{flex:1;min-width:0;font-size:14px;color:var(--ink-2)}
 .personal-stats strong{display:block;margin-top:6px;font-size:32px;line-height:1.3;color:var(--ink);overflow-wrap:anywhere}
 .personal-book{display:grid;align-content:center;gap:7px;min-height:130px;padding:24px;border:1px solid var(--border);border-radius:12px;background:var(--surface);color:var(--ink)}
 .personal-book strong{font-size:20px;line-height:1.4;overflow-wrap:anywhere}
 .personal-book small,.personal-book>span{font-size:14px;line-height:1.5;color:var(--ink-2)}
 .personal-panels{grid-column:1/-1;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;align-items:stretch}
 .personal-links{display:flex;flex-direction:column;min-width:0;padding:0 20px;border:1px solid var(--border);border-radius:12px;background:var(--surface)}
 .personal-links h2{padding:16px 0 12px;border-bottom:1px solid var(--border)}
 .personal-links a{display:flex;flex:1;align-items:center;justify-content:space-between;gap:16px;min-height:56px;padding:12px 0;border-bottom:1px solid var(--border);font-size:16px;line-height:1.5;color:var(--ink);overflow-wrap:anywhere}
 .personal-links a:last-child{border-bottom:0}
 .personal-links a>span:last-child,.personal-links a>b:last-child{color:var(--ink-3)}
 .personal-footnote{grid-column:1/-1;text-align:center;margin:4px 0 0;font-size:13px;line-height:1.5;color:var(--ink-3)}
}
.identity-dialog,.training-detail{border:1px solid var(--border);color:var(--ink);background:var(--surface);border-radius:16px;padding:20px;max-width:620px;width:calc(100% - 24px);max-height:calc(100dvh - 32px)}
dialog::backdrop{background:#0008}.identity-dialog label{display:block;margin:12px 0}.identity-dialog input[name=nickname]{display:block;min-height:44px;width:100%;border:1px solid var(--border);padding:10px}.identity-dialog footer{display:flex;justify-content:flex-end;gap:12px}
.identity-account{display:grid;gap:6px;margin:16px 0}.identity-account strong{font-size:20px;overflow-wrap:anywhere}.identity-account small{color:var(--ink-2);font-size:13px;line-height:1.5}
.training-detail[open]{display:flex;flex-direction:column;gap:16px}.training-detail header{display:flex;justify-content:space-between;align-items:center;gap:16px}.training-detail h2{margin:0;overflow-wrap:anywhere}.training-detail button{min-height:44px}.training-detail__body{overflow:auto;overscroll-behavior:contain}.training-detail footer .btn{width:100%}.training-detail .sentence-en{font-size:18px;line-height:1.6;margin:20px 0 8px}.training-detail .sentence-zh{color:var(--ink-2)}
.spelling-hint-toggle{display:block;min-height:44px;margin:12px auto;color:var(--indigo);font-weight:600}.spelling-hint{border-top:1px solid var(--border);padding:12px 0}.spelling-hint>p:first-child{color:var(--ink-2);text-align:center}.spelling-hint .quiz-sentence{border:0!important;padding:4px 0!important;margin:0!important}
@media(max-width:767px){
 .personal-center{display:block;padding:12px 16px 24px}.personal-header{display:flex;align-items:center;justify-content:space-between}.personal-header h1{font-size:24px;margin:8px 0}.personal-header a{display:grid;place-items:center;width:44px;height:44px}.personal-header svg{width:24px;height:24px}
 .personal-identity{width:100%;display:flex;align-items:center;gap:16px;padding:22px 0 24px;text-align:left;color:var(--ink)}.personal-avatar{width:64px;height:64px;flex:none;background:var(--indigo-soft);color:var(--indigo);border-radius:50%;display:grid;place-items:center}.personal-avatar svg{width:36px;height:36px}.personal-identity>span:nth-child(2){flex:1;min-width:0}.personal-identity strong{display:block;font-size:23px;overflow-wrap:anywhere}.personal-identity small{display:block;color:var(--ink-2);margin-top:5px}
 .personal-stats{display:flex;gap:32px;padding:20px;background:var(--surface);color:var(--ink);border-radius:12px}.personal-stats span{flex:1;font-size:13px;color:var(--ink-2)}.personal-stats strong{display:block;font-size:27px;font-weight:750;color:var(--ink);margin-top:4px}
 .personal-book{display:grid;gap:6px;padding:18px 20px;margin:12px 0 20px;background:var(--surface);border-radius:12px;color:var(--ink)}.personal-book small,.personal-book>span{color:var(--ink-2);font-size:13px}
 .personal-panels{display:grid;grid-template-columns:minmax(0,1fr);gap:18px}.personal-links{min-width:0;background:var(--surface);border-radius:12px;padding:0 16px}.personal-links h2{padding:16px 0 10px;border-bottom:1px solid var(--border)}.personal-links a{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:54px;border-bottom:1px solid var(--border);font-size:16px;color:var(--ink);overflow-wrap:anywhere}.personal-links a:last-child{border:0}.personal-links a span{color:var(--ink-3)}.personal-footnote{text-align:center;font-size:12px;color:var(--ink-3)}
 .profile-settings-wrapper:not(.is-settings-page){display:none}.personal-settings-page .settings-page>.page-heading{display:none}.personal-settings-page .settings-index{display:none}.personal-settings-page .settings-layout{display:block}
 body.training-session{height:100dvh;overflow:hidden;padding:0!important}.training-session>.site-header,.training-session>.mobile-nav{display:none!important;pointer-events:none!important}.training-session .site-main{height:100%;padding:0!important;max-width:none;margin:0}
 .training-topbar{display:flex;align-items:center;justify-content:space-between;gap:8px;min-height:52px;height:52px;padding:0 16px;border-bottom:1px solid var(--border);background:var(--paper);font-size:14px}.training-topbar>a,.training-topbar>button{min-height:44px;display:flex;align-items:center;color:var(--indigo)}.training-topbar>button:disabled{color:var(--ink-3);opacity:.65}
 .training-session .study-page,.training-session .review-workspace{padding:0!important;margin:0!important;height:100%;width:100%;max-width:none;display:flex;flex-direction:column;gap:0}
 .training-session .topbar,.training-session .review-compact-head,.training-session .study-page .main-grid>aside,.training-session .review-queue,.training-session .review-rules{display:none!important}
 .training-session .main-grid{display:block;flex:1;min-height:0;margin:0;padding:0;overflow:auto;overscroll-behavior:contain}.training-session .main-grid>main.panel{border:0;background:transparent;box-shadow:none;border-radius:0;padding:16px 16px 84px;min-height:100%}
 .training-session .mode-header,.training-session .quiz-word-meta,.training-session .task-kicker{display:none}.training-session .quiz-word-big{font-size:clamp(26px,9vw,42px);line-height:1.12;margin:0;overflow-wrap:anywhere;min-width:0;max-width:100%}.training-session .word-pronounce-row{margin:12px 0;gap:12px;min-width:0;display:flex}.training-session .word-pronounce-row .quiz-word-big{flex:1}.training-session .pronounce-button{min-height:44px;flex-shrink:0;padding:6px 10px;font-size:14px}
 .training-session .quiz-sentence{font-size:17px;line-height:1.5;margin:12px 0;padding:12px 0;border:0}.training-session .quiz-sentence-zh{font-size:13px;margin:4px 0 12px}.training-session .quiz-options{gap:9px;margin:16px 0 0}.training-session .quiz-opt-btn{min-height:54px;padding:10px 12px;font-size:16px;line-height:1.45;border-radius:9px;gap:12px;box-shadow:none}.training-session .opt-letter{font-size:16px;width:24px;min-width:24px;padding:0;border:0}.training-session .opt-text{overflow-wrap:anywhere}
 .training-session .review-layout{display:flex;flex-direction:column;flex:1;min-height:0;gap:0;margin:0}.training-session .review-sidebar{display:block;padding:0;margin:0}.training-session .review-tabs{position:static;box-shadow:none;display:grid;grid-template-columns:repeat(3,1fr);gap:0;margin:0;padding:0}.training-session .review-tabs button{min-height:54px;padding:5px;font-size:14px}.training-session .review-tabs small{font-size:11px;margin-top:3px}.training-session .review-task-card{flex:1;min-height:0;max-height:none!important;overflow:auto;border:0;box-shadow:none;border-radius:0;padding:12px 16px 78px;margin:0}.training-session .review-task-heading{margin:0;min-height:40px}.training-session .review-task-heading h1,.training-session .review-task-heading h2{font-size:17px}.training-session .review-task-heading .btn-fav-toggle{min-height:40px;padding:6px 12px}.training-session .review-mode-progress{display:none}
 .training-session .review-meaning-prompt{font-size:21px;margin:22px 0;text-align:center}.training-session .review-next-action,.training-session .study-card-primary-actions,.training-session .training-manual-next{position:fixed;z-index:45;bottom:var(--app-safe-bottom-inset,env(safe-area-inset-bottom,0px));left:16px;right:16px;margin:0 0 8px;width:calc(100% - 32px);min-height:48px;background:var(--action-bg);color:var(--on-action)}.training-session .training-manual-next{display:block}.training-session .study-card-primary-actions{display:flex;gap:8px;background:var(--paper);padding:8px 0}.training-session .study-card-primary-actions button{min-height:44px;flex:1;margin:0}.training-session .study-card-primary-actions #study-card-favorite{flex:0 0 70px}
 .training-session .study-card-word{margin:8px 0 16px}.training-session .study-card-word-main{font-size:36px}.training-session .answer-followup{margin:20px 0;padding:12px 0}.training-session .answer-followup h2{font-size:17px}.training-session .study-card-example .sentence-en{font-size:18px;line-height:1.55}
 body.training-session.has-spelling-keyboard{padding:0!important}.training-session.has-spelling-keyboard .main-grid,.training-session.has-spelling-keyboard .review-layout{margin-bottom:calc(var(--spelling-keyboard-height,220px) + 66px)}.training-session.has-spelling-keyboard .study-spelling-panel{max-height:none!important;overflow:visible!important;padding:0!important}.training-session.has-spelling-keyboard .review-task-card{padding-bottom:12px}.training-session.has-spelling-keyboard .main-grid>main.panel{padding-bottom:16px}.training-session.has-spelling-keyboard .spelling-hint-toggle{display:block!important}.training-session.has-spelling-keyboard .spelling-input--docked{height:48px;min-height:48px;border-radius:9px;font-size:23px}.spelling-keyboard{touch-action:none}.spelling-keyboard button{touch-action:none;user-select:none;-webkit-user-select:none}
 .training-session .spell-card,.training-session .study-spelling-panel{padding-bottom:0}.training-session .study-spelling-panel>div[x-text=currentMeanings]{font-size:21px!important;margin:28px 0!important;color:var(--ink)!important}.training-session .spelling-hint .quiz-sentence{font-size:17px}.training-session .spelling-hint .sentence-zh{font-size:14px}
}
@media(max-width:767px) and (max-height:500px){.training-topbar{height:44px;min-height:44px}.training-session .quiz-options{display:grid;grid-template-columns:1fr 1fr}.training-session .review-tabs button{min-height:44px}.training-session .word-pronounce-row{margin:0}.training-session .quiz-sentence{margin:4px 0;padding:4px 0}}

:root:not([data-theme=classic]) body{background:var(--paper);background-image:none}
:root:not([data-theme=classic]) body::before{display:none}
.site-header{background:var(--paper)}
.brand__mark{background:var(--action-bg);color:var(--on-action)}
.onboarding-rail{background:var(--action-bg);color:var(--on-action)}
.onboarding-brand,.onboarding-rail>p,.onboarding-steps li,.onboarding-steps li.is-current,.onboarding-steps li.is-complete{color:var(--on-action)}
.onboarding-steps li.is-current span{background:var(--accent-bg);color:var(--on-accent)}
.growth-current-rank,.growth-rank-card,.rank-current{background:var(--action-bg);color:var(--on-action)}
#cloze-bank button,.cloze-gap-button{background:var(--surface-strong);color:var(--ink)}
.completion-word{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 0;border-bottom:1px solid var(--border)}.completion-word button{min-height:44px;font-weight:700;color:var(--indigo);background:transparent}.completion-word span{font-size:13px;color:var(--ink-2)}
@media(max-width:767px){
 .personal-home>.site-header{display:none}.personal-identity{background:transparent}.personal-header{padding-top:8px}
 .training-session .study-quiz-phase{display:flex;flex-direction:column;min-height:calc(100dvh - 152px)}
 .training-session .study-quiz-phase>.word-pronounce-row{margin-top:clamp(12px,6dvh,52px)}
 .training-session .study-quiz-phase>.quiz-options{margin-top:auto;padding-top:20px}
 .training-session .review-mode-panel[x-show="mode==='choice'"]{display:flex;flex-direction:column;min-height:calc(100dvh - 232px)}
 .training-session .review-mode-panel>.quiz-options{margin-top:auto;padding-top:12px}
 .training-session .review-mode-panel>.word-pronounce-row{margin:18px 0}
 .training-session .quiz-sentence{background:transparent}
 .training-session .spell-result button{min-height:48px}
}
@media(max-width:767px) and (max-height:500px){.training-session .study-quiz-phase{min-height:0}.training-session .study-quiz-phase>.word-pronounce-row{margin-top:0}.training-session .review-mode-panel[x-show="mode==='choice'"]{min-height:0}}

button{background-color:transparent}

:root[data-theme=classic]{--vermilion:#b34632}
.task-book-cover,.task-book-cover>span,.plan-board__primary .eyebrow,.plan-modules span,.rank-ledger__identity .eyebrow,.rank-identity-metrics span{color:var(--on-action)}
.rank-ladder__node,.rank-ladder__status,.reading-difficulty-stars{color:var(--ink-3)}
.review-tabs--three button.active small{color:var(--on-action)}
.training-session .pronounce-button{white-space:nowrap;min-width:58px;width:auto}
[data-theme=dark] .wb-cover>span,[data-theme=dark] .wb-cover strong,[data-theme=dark] .wb-cover small{color:var(--on-action)}

.rank-ladder button .rank-ladder__node,.rank-ladder button .rank-ladder__status{color:var(--ink-3)}

.rank-ladder button.rank-ladder__step--current .rank-ladder__node,.rank-ladder button.rank-ladder__step--current .rank-ladder__status,.rank-ladder button.rank-ladder__step--reached .rank-ladder__node{color:var(--on-action)}