@import url('https://fonts.googleapis.com/css2?family=Newsreader:ital,opsz,wght@0,6..72,300;0,6..72,400;1,6..72,300&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root{
  color-scheme:light dark;
  --ground:#E4E7E4;
  --card:#FAFAF8;
  --ink:#232A2E;
  --moss:#3F5F4E;
  --on-moss:#F4F6F3;
  --muted:#5C665F;
  --faint:#6F7A73;
  --line:#C9D0C9;
  --ghost:#B4BCB6;
  --off:#C2CAC4;
  --on-off:#F0F2EF;
  --wash:#EDF1EE;
  --board-l:#EEF2EC;
  --board-d:#9CA89E;
  --piece-w:#FCFCFA;
  --piece-b:#1E2427;
  --warn:#9A5A4A;
  --card-shadow:none;
  --serif:'Newsreader', Georgia, serif;
  --mono:'IBM Plex Mono', ui-monospace, Menlo, monospace;
}

@media (prefers-color-scheme:dark){
  :root{
    --ground:#101417;
    --card:#191F22;
    --ink:#E6E9E4;
    --moss:#9CC0A8;
    --on-moss:#101619;
    --muted:#8B958E;
    --faint:#78837C;
    --line:#2B3438;
    --ghost:#4E5A54;
    --off:#2E3639;
    --on-off:#6E7873;
    --wash:#222B2C;
    --board-l:#5F6965;
    --board-d:#29332E;
    --piece-w:#F0F2EE;
    --piece-b:#0E1315;
    --warn:#D69C8E;
    --card-shadow:0 1px 0 rgba(255,255,255,.03) inset;
  }
}

*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{height:100%}
body{
  margin:0;
  background:var(--ground);
  color:var(--ink);
  font-family:var(--serif);
  display:flex;
  justify-content:center;
  padding:0 20px;
  padding-top:max(24px, env(safe-area-inset-top));
  padding-bottom:max(24px, env(safe-area-inset-bottom));
}

.frame{
  width:100%;
  max-width:560px;
  display:flex;
  flex-direction:column;
  min-height:100%;
}

/* ---- top rail ---- */
.rail{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.09em;
  text-transform:uppercase;
  color:var(--muted);
  padding-bottom:28px;
}
.rail button{
  font:inherit;
  letter-spacing:inherit;
  text-transform:inherit;
  background:none;
  border:0;
  color:var(--muted);
  padding:6px 0 6px 14px;
  cursor:pointer;
}
.rail button:hover{color:var(--moss)}
.count b{font-weight:500;color:var(--moss)}

/* ---- the card ---- */
.card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:2px;
  padding:34px 26px 26px;
  flex:1;
  display:flex;
  flex-direction:column;
}
.deck{
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--moss);
  background:none;
  border:0;
  padding:0 0 22px;
  margin:0;
  display:flex;
  align-items:center;
  gap:7px;
  cursor:pointer;
}
.deck svg{width:9px;height:9px;opacity:.7}
.deck:hover{color:var(--ink)}

/* ---- topic picker ---- */
.picktitle{
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--muted);
  padding-bottom:8px;
}
.pick{
  display:block;
  width:100%;
  text-align:left;
  background:none;
  border:0;
  border-bottom:1px solid var(--line);
  padding:17px 2px;
  font-family:var(--serif);
  font-size:21px;
  font-weight:300;
  color:var(--ink);
  cursor:pointer;
}
.pick:last-of-type{border-bottom:0}
.pick[data-live="1"]{color:var(--moss)}
.pick:hover{background:var(--wash)}
.pick em{
  font-family:var(--mono);
  font-size:10px;
  font-style:normal;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--muted);
  padding-left:9px;
}
.question{
  font-size:29px;
  line-height:1.28;
  font-weight:300;
  letter-spacing:-.01em;
  margin:0 0 30px;
  text-wrap:balance;
}
@media (max-width:380px){ .question{font-size:25px} }

textarea{
  width:100%;
  flex:1;
  min-height:120px;
  border:0;
  border-top:1px solid var(--line);
  background:transparent;
  padding:18px 0 0;
  font-family:var(--serif);
  font-size:19px;
  line-height:1.5;
  color:var(--ink);
  resize:none;
  outline:none;
}
textarea::placeholder{color:var(--ghost)}

.foot{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding-top:20px;
}
.save{
  font-family:var(--mono);
  font-size:13px;
  letter-spacing:.06em;
  background:var(--moss);
  color:var(--on-moss);
  border:0;
  border-radius:2px;
  padding:15px 30px;
  cursor:pointer;
}
.save:disabled{background:var(--off);color:var(--on-off);cursor:default}
.skip{
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.08em;
  background:none;
  border:0;
  color:var(--muted);
  padding:12px 0;
  cursor:pointer;
  text-align:left;
}
.skip:hover{color:var(--moss)}
.skip:disabled{color:var(--ghost);cursor:default}

/* ---- done ---- */
.done{
  flex:1;
  display:flex;
  flex-direction:column;
  justify-content:center;
  text-align:center;
  gap:16px;
}
.done .mark{
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--moss);
}
.done .line{
  font-size:26px;
  font-weight:300;
  font-style:italic;
  line-height:1.35;
}
.done .sub{
  font-family:var(--mono);
  font-size:12px;
  color:var(--muted);
  line-height:1.7;
}
.again{
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.08em;
  background:none;
  border:0;
  border-bottom:1px solid var(--line);
  color:var(--muted);
  padding:4px 0;
  margin:6px auto 0;
  cursor:pointer;
}
.again:hover{color:var(--moss);border-color:var(--moss)}

/* ---- archive ---- */
.entry{
  border-top:1px solid var(--line);
  padding:18px 0;
}
.entry:first-of-type{border-top:0}
.entry .q{font-size:15px;color:var(--muted);line-height:1.4;margin-bottom:7px}
.entry .a{font-size:18px;line-height:1.5;font-weight:300}
.entry .d{font-family:var(--mono);font-size:10px;letter-spacing:.08em;color:var(--faint);margin-top:9px;text-transform:uppercase}
.scroll{flex:1;overflow-y:auto;-webkit-overflow-scrolling:touch}
.empty{color:var(--muted);font-size:19px;font-weight:300;font-style:italic;padding:30px 0}

.fade{animation:fade .32s ease}
@keyframes fade{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){ .fade{animation:none} }


/* ---- memorize ---- */
.frag{
  font-size:27px;
  line-height:1.4;
  font-weight:300;
  margin:0;
  flex:1;
  display:flex;
  align-items:center;
  text-wrap:pretty;
}
@media (max-width:380px){ .frag{font-size:23px} }
.frag .blank{color:var(--ghost)}
.frag .hint{font-family:var(--mono);font-size:.7em;letter-spacing:.06em;color:var(--muted)}
.cue{
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--muted);
  padding-bottom:18px;
  line-height:1.7;
}
.cue b{color:var(--moss);font-weight:500}
.grades{display:flex;gap:10px;padding-top:20px}
.grades .save{flex:1;text-align:center}
.ghostbtn{
  flex:1;
  font-family:var(--mono);
  font-size:13px;
  letter-spacing:.06em;
  background:none;
  color:var(--muted);
  border:1px solid var(--line);
  border-radius:2px;
  padding:14px 0;
  cursor:pointer;
}
.ghostbtn:hover{color:var(--moss);border-color:var(--moss)}
.maprow{border-top:1px solid var(--line);padding:16px 0}
.maprow:first-of-type{border-top:0}
.maptitle{font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);display:flex;justify-content:space-between;gap:12px}
.bars{display:flex;gap:3px;padding-top:10px}
.bars i{height:7px;flex:1;border-radius:1px;background:var(--line)}
.bars i[data-l="1"]{background:var(--ghost)}
.bars i[data-l="2"]{background:var(--faint)}
.bars i[data-l="3"]{background:var(--muted)}
.bars i[data-l="4"]{background:var(--moss)}
.maptext{font-size:16px;line-height:1.5;font-weight:300;color:var(--muted);padding-top:12px}



/* ---- chess: the position ----
   Quiet board in the green-greys so moss stays reserved for progress and
   correctness. Coordinates and gapless squares are what tell this apart from
   the progress map, which has neither. */
.cwrap{
  display:grid;
  grid-template-columns:13px 1fr;
  grid-template-rows:1fr 15px;
  column-gap:5px;
  width:100%;
}
.cboard{
  grid-column:2;grid-row:1;
  display:grid;
  grid-template-columns:repeat(8,1fr);
  aspect-ratio:1/1;
  width:100%;
  border:1px solid var(--line);
  touch-action:manipulation;
}
/* Coordinates sit outside the squares: on the card they clear AA, and the
   labelled gutters are half of what tells this apart from the progress map. */
.cranks,.cfiles{
  display:flex;
  font-family:var(--mono);
  font-size:9px;
  letter-spacing:.06em;
  color:var(--muted);
  user-select:none;
}
.cranks{grid-column:1;grid-row:1;flex-direction:column}
.cfiles{grid-column:2;grid-row:2;align-items:center}
.cranks span,.cfiles span{flex:1;display:flex;align-items:center;justify-content:center}
.sq{
  position:relative;
  border:0;
  padding:0;
  background:var(--board-l);
  display:flex;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  font-size:clamp(20px,6.4vw,34px);
  line-height:1;
}
.sq[data-d="1"]{background:var(--board-d)}
.pc{
  pointer-events:none;
  font-family:"Segoe UI Symbol","Apple Symbols","DejaVu Sans",sans-serif;
  color:var(--piece-b);
}
.pc[data-c="w"]{
  color:var(--piece-w);
  text-shadow:0 1px 0 var(--piece-b),0 -1px 0 var(--piece-b),1px 0 0 var(--piece-b),-1px 0 0 var(--piece-b);
}
.pc[data-c="b"]{
  color:var(--piece-b);
  text-shadow:0 1px 0 var(--piece-w),0 -1px 0 var(--piece-w),1px 0 0 var(--piece-w),-1px 0 0 var(--piece-w);
}
.sq::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
}
.sq[data-m~="last"]::after{background:var(--moss);opacity:.14}
.sq[data-m~="sel"]::after{box-shadow:inset 0 0 0 3px var(--moss)}
.sq[data-m~="go"]::after{
  background:radial-gradient(circle at 50% 50%,var(--moss) 0 17%,transparent 18%);
  opacity:.5;
}
.sq[data-m~="take"]::after{box-shadow:inset 0 0 0 3px var(--moss);opacity:.55}

.turn{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--muted);
  padding:14px 0 0;
  line-height:1.6;
}
.turn b{color:var(--moss);font-weight:500}
.dots{display:flex;gap:5px;flex:0 0 auto}
.dots i{width:7px;height:7px;border-radius:50%;background:var(--line)}
.dots i[data-s="now"]{box-shadow:inset 0 0 0 1.5px var(--muted);background:none}
.dots i[data-s="hit"]{background:var(--moss)}
.dots i[data-s="miss"]{background:none;box-shadow:inset 0 0 0 1.5px var(--warn)}

.promo{
  display:flex;
  align-items:center;
  gap:8px;
  padding-top:16px;
}
.promolab{
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--muted);
  padding-right:4px;
}
.promo button{
  flex:1;
  font-size:26px;
  line-height:1;
  font-family:"Segoe UI Symbol","Apple Symbols","DejaVu Sans",sans-serif;
  color:var(--ink);
  background:none;
  border:1px solid var(--line);
  border-radius:2px;
  padding:10px 0;
  cursor:pointer;
}
.promo button:hover{border-color:var(--moss);color:var(--moss)}

/* ---- chess: the teaching text ---- */
.teach{
  font-size:19px;
  line-height:1.55;
  font-weight:300;
  margin:0 0 16px;
  text-wrap:pretty;
}
.teach.faint{font-size:16px;color:var(--muted);font-style:italic}

/* ---- chess: the progress map ----
   Not a position. Gaps between cells, motifs in visible pairs, rank titles,
   no coordinates, no pieces. */
.maprank{padding:0 0 18px}
.mapcells{display:flex;gap:9px;padding-top:9px}
.mappair{display:flex;gap:3px;flex:1}
.mapsq{
  flex:1;
  aspect-ratio:1/1;
  border:1px solid var(--line);
  border-radius:1px;
  background:linear-gradient(to top,var(--moss) 0 var(--fill,0%),var(--wash) var(--fill,0%) 100%);
  cursor:pointer;
  padding:0;
}
.mapsq[data-t="2"]{background:linear-gradient(to top,var(--moss) 0 var(--fill,0%),var(--line) var(--fill,0%) 100%)}
.mapsq[data-f="1"]{background:var(--moss);border-color:var(--moss)}
.mapsq:hover{border-color:var(--moss)}
.maplegend{
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--muted);
  line-height:1.7;
  padding-top:14px;
  border-top:1px solid var(--line);
}

/* ---- chess: the motif picker ---- */
.tierrow{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  border-bottom:1px solid var(--line);
  padding:13px 2px;
  font-size:19px;
  font-weight:300;
}
.tiers{display:flex;gap:6px;flex:0 0 auto}
.tiers button{
  width:34px;
  height:34px;
  font-family:var(--mono);
  font-size:12px;
  color:var(--muted);
  background:none;
  border:1px solid var(--line);
  border-radius:2px;
  cursor:pointer;
}
.tiers button[data-f="1"]{background:var(--moss);color:var(--on-moss);border-color:var(--moss)}
.tiers button:hover{border-color:var(--moss);color:var(--moss)}
.tiers button[data-f="1"]:hover{color:var(--on-moss)}

:focus-visible{outline:2px solid var(--moss);outline-offset:3px}