:root{color-scheme:light;--ink:#292333;--muted:#665b70;--accent:#594185;--lavender:#eee7f6;--line:#ded3e6;--paper:#fcf9f5}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.65 system-ui,"Microsoft YaHei",sans-serif}
header{max-width:1000px;margin:auto;padding:19px 24px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:16px;color:var(--accent)}
.brand{font:bold 40px Georgia,serif;text-decoration:none}.home-link{margin-left:auto}a{color:var(--accent)}
main{max-width:900px;margin:auto;padding:30px 24px 80px}.home{max-width:620px;margin:auto}
h1,h2,h3{line-height:1.3;margin:0 0 16px}h1{font-size:clamp(30px,5vw,46px)}h2{font-size:26px}h3{font-size:19px}
p{margin:8px 0 16px}.muted,small{color:var(--muted)}
button,.button{font:inherit;cursor:pointer;color:var(--accent);background:white;border:1px solid var(--line);border-radius:9px;padding:9px 15px;display:inline-block;text-decoration:none}
button:disabled{opacity:.45;cursor:default}.primary,[aria-selected="true"]{color:white;background:var(--accent);border-color:var(--accent)}
:focus-visible{outline:3px solid var(--accent);outline-offset:3px}::selection{background:var(--lavender);color:var(--ink)}
.resume{display:block;padding:18px;background:var(--lavender);border-radius:12px;text-decoration:none;font-weight:650}
.resume-card{display:grid;gap:3px;border:1px solid var(--line);box-shadow:0 8px 24px #39274d12}
.resume-card small{font-weight:500}.resume-card strong{font-size:22px;line-height:1.3}.resume-card span{color:var(--muted);font-weight:500}
.shortcuts.home-actions{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin:12px 0 18px}.home-actions .button{padding:10px 8px;text-align:center}.mobile-save-bar{display:none}
.shortcuts,.tabs,.actions,.catalog{display:flex;gap:10px;flex-wrap:wrap}.shortcuts{margin:12px 0 28px}.shortcuts a{flex:1;text-align:center}
.ask{padding-top:20px;border-top:1px solid var(--line);margin-top:24px}.ask label{display:block;font-size:21px;font-weight:650;margin-bottom:10px}
.ask input{font:inherit;width:100%;padding:12px;border:1px solid var(--accent);border-radius:9px;background:white}.ask button{margin-top:9px}.message{color:var(--muted);margin-bottom:0}
.catalog{margin-top:24px}.tabs{margin:20px 0 22px}.tabs button{flex:1;white-space:nowrap}
article{padding:20px 0;border-top:1px solid var(--line)}.english{font:clamp(21px,3vw,27px)/1.55 Georgia,serif;margin:8px 0 12px}
.zh{padding:12px 16px;background:white;border:1px solid var(--line);border-radius:8px}.reference-text{white-space:pre-wrap;overflow-wrap:anywhere}
.focused{background:var(--lavender);border-radius:3px}.saved-word{text-decoration:underline 2px var(--accent);text-underline-offset:4px}.saved-sentence{box-shadow:inset 0 -2px var(--accent)}
details{border:1px solid var(--line);border-radius:8px;padding:10px 14px;margin:10px 0}summary{cursor:pointer;color:var(--accent)}
.actions{margin-top:16px}.entry{border-top:1px solid var(--line);padding:14px 0}.entry h2{font-size:20px;margin-bottom:4px}
#selection-menu{position:fixed;z-index:5;display:flex;gap:4px;background:white;padding:5px;border:1px solid var(--line);border-radius:10px;box-shadow:0 4px 16px #39274d25}
#selection-menu[hidden]{display:none}#notice{position:fixed;bottom:16px;left:50%;transform:translateX(-50%);background:var(--accent);color:white;padding:6px 16px;border-radius:20px;white-space:nowrap;z-index:6}#notice:empty{display:none}
@media(max-width:480px){header,main{padding-left:16px;padding-right:16px}.tabs button{padding:7px 6px}.tabs{gap:5px}}

:root[data-theme="blue"]{--accent:#27578c;--lavender:#e3eefb;--line:#c9d9ea}
:root[data-theme="pink"]{--accent:#923b65;--lavender:#f9e7ef;--line:#ecd0de}
:root[data-theme="orange"]{--accent:#914615;--lavender:#fbeadb;--line:#ead4c0}
:root[data-theme="green"]{--accent:#32614a;--lavender:#e5efe6;--line:#cddfd1}
.theme-picker{margin-left:auto;display:flex;gap:4px;align-items:center}
.theme-picker button{--swatch:#594185;display:grid;place-items:center;width:32px;height:32px;padding:0;background:transparent;border:1px solid transparent;border-radius:50%}
.theme-picker button::before{content:"";width:17px;height:17px;border-radius:50%;background:var(--swatch)}
.theme-picker button[aria-pressed="true"]{border:2px solid var(--swatch)}
.theme-picker [data-theme="blue"]{--swatch:#27578c}
.theme-picker [data-theme="pink"]{--swatch:#923b65}
.theme-picker [data-theme="orange"]{--swatch:#914615}
.theme-picker [data-theme="green"]{--swatch:#32614a}
.home-link{margin-left:0;white-space:nowrap}
.account-link{white-space:nowrap;font-size:14px;text-decoration:none;border:1px solid var(--line);padding:6px 10px;border-radius:999px;background:white}
.trial-status{margin:14px 0;padding:10px 12px;border:1px solid var(--line);border-radius:9px;background:white;font-size:14px}
.account-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:18px}
.account-form,.account-card{padding:18px;border:1px solid var(--line);border-radius:12px;background:white}
.account-form h2,.account-card h2{font-size:22px}.account-form label{display:block;margin:12px 0;font-weight:600}
.account-form input{display:block;width:100%;margin-top:6px;padding:10px;font:inherit;border:1px solid var(--line);border-radius:8px;background:var(--paper)}
.account-form button{margin-top:6px}.danger-text{color:#a1263d}
.sync-status{font-size:14px;padding:8px 10px;border:1px dashed var(--line);border-radius:8px;background:#faf9ff}
.sync-status.sync-failed{border-color:#d69aa7;background:#fff5f7}
.sync-status button{margin-left:8px}
@media(max-width:700px){.account-grid{grid-template-columns:1fr}header{gap:8px}.account-link{font-size:12px;padding:5px 8px}.theme-picker{gap:2px}.theme-picker button{width:27px;height:27px}}
@media(max-width:480px){header{flex-wrap:wrap;gap:8px 12px}.theme-picker{margin-left:0}.home-link{margin-left:auto}}
.ai-note{display:block;margin-top:8px}.chat-history p{white-space:pre-wrap;overflow-wrap:anywhere;background:var(--lavender);padding:10px 14px;border-radius:8px}
.pending{color:var(--muted);font-style:italic}.year-switch{max-width:420px}
.questions{margin:26px 0 8px}.qitem summary{font-weight:600}.anchor{padding:8px 0;border-top:1px dashed var(--line)}.anchor:first-of-type{border-top:0}
.distractors{margin:16px 0}.distractors details{margin:8px 0;padding:8px 10px;border:1px solid var(--line);border-radius:8px;background:white}.distractors summary{cursor:pointer;font-weight:600}.distractors p{margin:8px 0}
.detail-block{margin:16px 0}.detail-block h3{margin:12px 0 6px;font-size:1rem}.detail-block details{margin:8px 0;padding:8px 10px;border:1px solid var(--line);border-radius:8px;background:white}.detail-block summary{cursor:pointer;font-weight:600}.detail-block p{margin:8px 0}
.qtable{width:100%;border-collapse:collapse;margin:8px 0 16px}.qtable th,.qtable td{border:1px solid var(--line);padding:6px 8px;text-align:center}
mark{background:var(--lavender);color:var(--ink);border-radius:3px;padding:0 2px}

.catalog-dialog{width:min(390px,100%);max-width:390px;height:100dvh;max-height:100dvh;margin:0 0 0 auto;padding:0;border:0;border-left:1px solid var(--line);background:var(--paper);color:var(--ink);box-shadow:-18px 0 50px #39274d26}
.catalog-dialog::backdrop{background:#29233355;backdrop-filter:blur(2px)}
.catalog-head{position:sticky;top:0;z-index:1;display:flex;align-items:flex-start;justify-content:space-between;gap:16px;padding:20px;background:var(--paper);border-bottom:1px solid var(--line)}
.catalog-head h2{margin:0;font-size:26px}.catalog-head .eyebrow{margin:0 0 2px;color:var(--muted);font-size:13px;letter-spacing:.08em;text-transform:uppercase}
.catalog-close{flex:none}
.catalog-body{height:calc(100dvh - 92px);overflow:auto;padding:8px 20px 40px;overscroll-behavior:contain}
.catalog-hint{color:var(--muted);font-size:14px;margin:4px 0 12px}
.catalog-year-block{border-bottom:1px solid var(--line)}
.catalog-year{display:flex;width:100%;align-items:center;justify-content:space-between;gap:12px;padding:15px 4px;border:0;background:transparent;color:var(--ink);text-align:left}
.catalog-year span{font-size:20px;font-weight:700}.catalog-year small{color:var(--muted);text-align:right}
.catalog-year[aria-expanded="true"]{color:var(--accent)}
.catalog-year-panel{padding:0 0 14px}
.catalog-type h3{margin:10px 0 7px;font-size:14px;color:var(--muted);letter-spacing:.04em}
.catalog-items{display:grid;gap:7px}
.catalog-item{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px 12px;border:1px solid var(--line);border-radius:9px;background:white;text-decoration:none}
.catalog-item:hover{border-color:var(--accent);background:var(--lavender)}.catalog-item small{color:var(--muted);white-space:nowrap}
@media(max-width:680px){
.catalog-dialog{width:100%;max-width:none;height:auto;max-height:80dvh;margin:auto 0 0;border-left:0;border-top:1px solid var(--line);border-radius:18px 18px 0 0;box-shadow:0 -18px 50px #39274d26}
.catalog-body{height:auto;max-height:calc(80dvh - 92px);padding-bottom:calc(28px + env(safe-area-inset-bottom))}
.home-actions{gap:7px}.home-actions .button{padding:10px 4px;font-size:14px}
main{padding-bottom:calc(112px + env(safe-area-inset-bottom))}
.mobile-save-bar{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:4;gap:8px;padding:10px 12px calc(10px + env(safe-area-inset-bottom));background:var(--paper);border-top:1px solid var(--line);box-shadow:0 -8px 24px #39274d18}
.mobile-save-bar button{flex:1;min-height:44px;padding:8px 10px}
.mobile-save-bar button:disabled{opacity:.45}
}

/* Part B ordering board (rc3 display fix, 2026-11-10) */
.ordering-slots{list-style:none;margin:0 0 1rem;padding:0;display:grid;gap:6px}
.ordering-slot{display:grid;grid-template-columns:5.2rem 1fr auto;gap:8px;align-items:center;padding:8px 10px;border:1px solid var(--line);border-radius:8px;background:var(--paper)}
.ordering-slot.fixed{background:#f4f1ea}
.ordering-slot.current{border-color:#3a7d4a;background:#f3fff6}