@font-face{font-family:"Young Serif";src:url(fonts/youngserif-normal-400.woff2) format("woff2");font-display:swap}
@font-face{font-family:"Source Serif 4";src:url(fonts/sourceserif4-normal-400.woff2) format("woff2");font-weight:200 900;font-display:swap}

:root{
  --desk:#e9e4d6; --ink:#1e2226; --soft:#5d5f5a; --line:#cbc5b3;
  --paper:#fffdf7; --rule:#c5d6e6; --red:#d9675f;
  --pen:#24457a; --pen-ink:#fff; --good:#2c7a4b; --bad:#b0362c; --field:#fbf9f2;
  --serif:"Source Serif 4","Frank Ruhl Libre","David",Georgia,serif;
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans Hebrew",sans-serif;
}
@media (prefers-color-scheme:dark){
  :root{
    --desk:#191b1a; --ink:#e9e5da; --soft:#a3a399; --line:#383b38;
    --paper:#25282a; --rule:#34414d; --red:#a8544e;
    --pen:#9dbcee; --pen-ink:#10192a; --good:#7cc79a; --bad:#f08a80; --field:#202322;
  }
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--desk);color:var(--ink);font:16px/1.5 var(--sans)}
main{max-width:720px;margin:0 auto;padding:28px 18px 80px}
h1,h2{font-family:"Young Serif",var(--serif);font-weight:400;line-height:1.15;margin:0}
h1{font-size:2rem}
h2{font-size:1.25rem;margin:40px 0 10px}
p{margin:0 0 12px}
a{color:var(--pen)}
.soft{color:var(--soft)}
.small{font-size:.9rem}
[hidden]{display:none!important}

button,input,textarea,select{font:inherit;color:inherit}
.btn{background:var(--pen);color:var(--pen-ink);border:1px solid var(--pen);border-radius:4px;padding:10px 18px;cursor:pointer;text-decoration:none;display:inline-block}
.btn.plain{background:transparent;color:var(--ink);border-color:var(--line)}
.btn.no{background:transparent;color:var(--bad);border-color:var(--bad)}
.btn.yes{background:var(--good);border-color:var(--good);color:var(--paper)}
.btn:focus-visible,.link:focus-visible,a:focus-visible,.card:focus-visible{outline:2px solid var(--pen);outline-offset:2px}
.link{background:none;border:0;padding:0;color:var(--pen);text-decoration:underline;cursor:pointer}
.link.danger{color:var(--bad)}
input[type=text],textarea,select{background:var(--field);border:1px solid var(--line);border-radius:4px;padding:10px 12px;width:100%}
input[type=text]:focus,textarea:focus,select:focus{outline:2px solid var(--pen);outline-offset:-1px}
textarea{resize:vertical;min-height:4.5em;display:block}
select{width:auto;padding:6px 8px}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.row > input[type=text]{flex:1 1 200px;width:auto}

/* the index card */
.card{position:relative;width:100%;max-width:540px;aspect-ratio:5/3;margin:0 auto;display:block}
.card.flip{cursor:pointer}
.side{position:absolute;inset:0;border-radius:5px;padding:52px 22px 16px;overflow:hidden;
  background-color:var(--paper);
  background-image:linear-gradient(var(--red),var(--red)),repeating-linear-gradient(transparent 0 29px,var(--rule) 29px 30px);
  background-size:100% 1.5px,100% 100%;background-position:0 42px,0 43px;background-repeat:no-repeat;
  box-shadow:0 0 0 1px rgba(0,0,0,.07),0 14px 22px -16px rgba(0,0,0,.45);
  backface-visibility:hidden;-webkit-backface-visibility:hidden;
  transition:transform .42s cubic-bezier(.3,.7,.2,1);transform:perspective(1300px) rotateX(0)}
.side.back{transform:perspective(1300px) rotateX(180deg)}
.card.on .front{transform:perspective(1300px) rotateX(-180deg)}
.card.on .back{transform:perspective(1300px) rotateX(0)}
@media (prefers-reduced-motion:reduce){.side{transition:none}}
.tab{position:absolute;top:12px;left:22px;right:22px;font-size:.8rem;color:var(--soft);display:flex;justify-content:space-between}
.face{height:100%;width:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;text-align:center}
.face img{max-width:100%;max-height:100%;min-height:0;flex:0 1 auto;object-fit:contain;border-radius:3px}
.face p{margin:0;padding:.18em 0;overflow-x:hidden;font-family:var(--serif);max-height:100%;overflow:auto;overflow-wrap:anywhere;white-space:pre-wrap;flex:0 0 auto;max-width:100%}
.face img + p{max-height:40%}
.t-xl{font-size:clamp(1.8rem,8vw,3rem);line-height:1.1}
.t-l{font-size:clamp(1.3rem,5.5vw,2rem);line-height:1.2}
.t-m{font-size:1.2rem;line-height:1.35}
.t-s{font-size:1rem;line-height:1.4}

/* home */
.top{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:26px}
.top a{text-decoration:none;color:var(--ink);font-family:"Young Serif",var(--serif);font-size:1.15rem}
.lede{font-family:var(--serif);font-size:1.15rem;max-width:34em;margin:22px auto 0;text-align:center}
ul.list{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
ul.list > li{border-bottom:1px solid var(--line)}
.deckrow{display:flex;justify-content:space-between;gap:14px;align-items:baseline;padding:14px 2px;text-decoration:none;color:var(--ink)}
.deckrow b{font-family:var(--serif);font-weight:600;font-size:1.15rem;overflow-wrap:anywhere}
.deckrow span{color:var(--soft);white-space:nowrap;font-size:.9rem}
.deckrow:hover b{text-decoration:underline}

/* deck */
.name{font-family:"Young Serif",var(--serif);font-size:1.9rem;background:transparent!important;border-color:transparent!important;padding:2px 0!important}
.name:hover{border-bottom-color:var(--line)!important}
.modes{display:grid;grid-template-columns:1fr 1fr;gap:0 26px}
.modes a{display:block;padding:12px 2px;border-bottom:1px solid var(--line);text-decoration:none;color:var(--ink)}
.modes a b{color:var(--pen);font-family:var(--serif);font-size:1.15rem;font-weight:600}
.modes a:hover b{text-decoration:underline}
.modes a span{display:block;color:var(--soft);font-size:.9rem}
.opts{margin-top:14px;display:grid;gap:8px}
.opts label{display:flex;gap:8px;align-items:center}
.tabs{display:flex;gap:18px;margin-bottom:12px}
.tabs button{background:none;border:0;border-bottom:2px solid transparent;padding:4px 0;cursor:pointer;color:var(--soft)}
.tabs button[aria-selected=true]{color:var(--ink);border-bottom-color:var(--pen)}
.two{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.edface .lab{display:block;font-size:.85rem;color:var(--soft);margin-bottom:4px}
.edface textarea{font-family:var(--serif);font-size:1.1rem}
.edface .pic img{display:block;max-height:120px;max-width:100%;margin:8px 0 4px;border-radius:3px}
.edface .link{font-size:.9rem;margin-top:6px}
.cardrow{display:grid;grid-template-columns:1fr 1fr auto;gap:12px;align-items:center;padding:10px 2px}
.cardrow .tx{font-family:var(--serif);overflow-wrap:anywhere;display:flex;gap:8px;align-items:center;min-width:0}
.cardrow .tx img{height:34px;width:34px;object-fit:cover;border-radius:3px;flex:none}
.cardrow .tx.b{color:var(--soft)}
.cardrow .acts{display:flex;gap:12px;align-items:center;font-size:.9rem}
.lvl{display:inline-flex;gap:2px}
.lvl i{width:5px;height:11px;background:var(--line);border-radius:1px}
.lvl i.f{background:var(--good)}
.foot{margin-top:44px;display:flex;gap:8px 22px;flex-wrap:wrap;font-size:.95rem}

/* study */
.sbar{display:flex;justify-content:space-between;gap:12px;margin-bottom:26px;font-size:.95rem}
.sbar a{text-decoration:none;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.sbar span{color:var(--soft);white-space:nowrap}
.under{max-width:540px;margin:20px auto 0}
.under .row{justify-content:center}
.under form.row{justify-content:stretch}
.under input[type=text]{font-family:var(--serif);font-size:1.25rem}
.hint{text-align:center;color:var(--soft);font-size:.9rem;margin-top:14px}
.res{margin-top:14px;font-family:var(--serif);font-size:1.15rem}
.res .ok{color:var(--good)}
.res .lab{font:0.85rem var(--sans);color:var(--soft);display:inline-block;min-width:5.5em}
.res mark{background:none;color:var(--bad);text-decoration:underline;text-decoration-thickness:2px;font-weight:600}
.res mark.miss{color:var(--good)}
.choices{display:grid;gap:8px}
.choices button{text-align:start;background:var(--field);border:1px solid var(--line);border-radius:4px;padding:11px 14px;cursor:pointer;font-family:var(--serif);font-size:1.1rem;display:flex;gap:12px}
.choices button kbd{font:0.85rem var(--sans);color:var(--soft);padding-top:3px}
.choices button.right{border-color:var(--good);box-shadow:inset 0 0 0 1px var(--good)}
.choices button.wrong{border-color:var(--bad);color:var(--bad)}
.invisible{visibility:hidden}
.gap{margin-top:14px}

#toast{position:fixed;left:50%;bottom:18px;transform:translateX(-50%);background:var(--ink);color:var(--desk);padding:10px 16px;border-radius:4px;display:flex;gap:14px;max-width:calc(100vw - 24px);z-index:5}
#toast .link{color:inherit}

@media (max-width:560px){
  main{padding:18px 14px 70px}
  .two,.modes{grid-template-columns:1fr}
  .cardrow{grid-template-columns:1fr auto}
  .cardrow .tx.b{grid-column:1;grid-row:2;margin-top:-6px}
  .cardrow .acts{grid-row:1 / span 2;grid-column:2}
  .name{font-size:1.5rem}
  .side{padding:50px 14px 12px}
}