/* Printable Worksheets for Kids — screen + print stylesheet.
   One file on purpose: the whole thing is well under a single TCP window, so
   splitting it would cost a round trip and save nothing.

   Print rules live at the bottom in @media print and are the real product:
   the sheet has to come out of a home printer on one page, in black, with the
   site chrome gone and the answer key absent. */

:root{
  --ink:#16181d;
  --ink-2:#4a5161;
  --ink-3:#6b7384;
  --line:#dfe3ea;
  --line-2:#eef1f6;
  --paper:#ffffff;
  --paper-2:#f7f8fb;
  --brand:#1d4ed8;
  --brand-d:#1736a8;
  --brand-w:#eef2ff;
  --accent:#b4530a;
  --wrap:1120px;
  --gut:clamp(16px,3.4vw,32px);
  --serif:Georgia,'Times New Roman',serif;
  --sans:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;
  --mono:ui-monospace,'SF Mono',Menlo,Consolas,monospace;
  --r:10px;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font:400 17px/1.65 var(--sans);
  -webkit-font-smoothing:antialiased;
}
img,svg{max-width:100%}
a{color:var(--brand);text-decoration-thickness:1px;text-underline-offset:2px}
a:hover{color:var(--brand-d)}
h1,h2,h3{font-family:var(--serif);line-height:1.2;letter-spacing:-.01em;margin:0}
button,select,input{font:inherit}
ol,ul{margin:0;padding:0;list-style:none}

.vh{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:-9999px;top:0;z-index:50;background:var(--brand);color:#fff;padding:10px 16px}
.skip:focus{left:8px;top:8px}
:focus-visible{outline:3px solid var(--brand);outline-offset:2px}

/* ------------------------------------------------------------------ header */
header.site{border-bottom:1px solid var(--line);background:var(--paper);
  position:sticky;top:0;z-index:30}
.bar{max-width:var(--wrap);margin:0 auto;padding:0 var(--gut);
  display:flex;align-items:center;gap:20px;min-height:62px}
.brand{font-family:var(--serif);font-weight:700;font-size:21px;color:var(--ink);
  text-decoration:none;letter-spacing:-.02em;flex:0 1 auto;line-height:1.2;
  padding:9px 0}
.brand-m{border-bottom:3px solid var(--brand);padding-bottom:1px}
.topnav{margin-left:auto;min-width:0}
.topnav ul{display:flex;gap:clamp(12px,1.6vw,24px);flex-wrap:wrap}
.topnav a{color:var(--ink-2);text-decoration:none;font-size:15px;font-weight:500;
  white-space:nowrap}
.topnav a:hover{color:var(--brand)}
.gbar{border-top:1px solid var(--line-2);background:var(--paper-2)}
.gbar ul{max-width:var(--wrap);margin:0 auto;padding:7px var(--gut);
  display:flex;gap:6px;overflow-x:auto;scrollbar-width:none}
.gbar ul::-webkit-scrollbar{display:none}
.gbar a{font-size:13px;font-weight:600;color:var(--ink-2);text-decoration:none;
  padding:4px 11px;border:1px solid var(--line);border-radius:99px;background:var(--paper);
  white-space:nowrap}
.gbar a:hover{border-color:var(--brand);color:var(--brand)}

.burger{display:none;margin-left:auto;background:none;border:1px solid var(--line);
  border-radius:8px;width:42px;height:38px;padding:9px 10px;cursor:pointer;
  flex-direction:column;justify-content:space-between}
.burger span:not(.vh){display:block;height:2px;background:var(--ink);border-radius:2px}
.drawer{display:none}
.drawer ul{padding:6px var(--gut)14px;border-top:1px solid var(--line-2)}
.drawer a{display:block;padding:11px 0;color:var(--ink);text-decoration:none;
  font-weight:500;border-bottom:1px solid var(--line-2)}

@media (max-width:860px){
  .topnav{display:none}
  .burger{display:flex}
  .drawer.on{display:block}
}
/* A long site name needs room to breathe next to the menu button, and room to
   wrap onto two lines on the narrowest phones. */
@media (max-width:560px){
  .bar{gap:12px}
  .brand{font-size:17px}
  .burger{flex:0 0 auto}
}
@media (max-width:380px){
  .brand{font-size:15.5px}
}

/* --------------------------------------------------------------- structure */
main{max-width:var(--wrap);margin:0 auto;padding:0 var(--gut) 56px}
.crumbs{padding:16px 0 4px;font-size:13.5px;color:var(--ink-3)}
.crumbs ol{display:flex;flex-wrap:wrap;gap:6px}
.crumbs li+li::before{content:"/";margin-right:6px;color:var(--line)}
.crumbs a{color:var(--ink-3);text-decoration:none}
.crumbs a:hover{color:var(--brand);text-decoration:underline}

.ph{padding:14px 0 26px;max-width:72ch}
.ph h1,.hero h1{font-size:clamp(28px,4.4vw,42px)}
.lede{color:var(--ink-2);font-size:clamp(16.5px,1.5vw,18.5px);margin:14px 0 0}
.hero{padding:clamp(28px,5vw,58px) 0 clamp(22px,3vw,34px);max-width:74ch}
.hero-ctas{display:flex;flex-wrap:wrap;gap:12px;margin:26px 0 0}

.pills{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0 0}
.pill{display:inline-block;font-size:13px;font-weight:600;text-decoration:none;
  padding:4px 11px;border-radius:99px;background:var(--brand-w);color:var(--brand-d);
  border:1px solid #dbe4ff}
.pill:hover{background:#e3e9ff;color:var(--brand-d)}
.pill-q{background:var(--paper-2);color:var(--ink-3);border-color:var(--line);
  font-family:var(--mono);font-size:12px}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;
  font-size:14.5px;font-weight:600;padding:9px 17px;border-radius:8px;cursor:pointer;
  border:1px solid var(--line);background:var(--paper);color:var(--ink);
  text-decoration:none;white-space:nowrap}
.btn:hover{border-color:var(--ink-3);color:var(--ink)}
.btn-p{background:var(--brand);border-color:var(--brand);color:#fff}
.btn-p:hover{background:var(--brand-d);border-color:var(--brand-d);color:#fff}

/* ------------------------------------------------------------------- lists */
.list{padding:8px 0}
.list h2,.rel h2,.notes h2{font-size:clamp(19px,2.1vw,23px);margin:34px 0 14px}
.list h2 a{color:inherit;text-decoration:none}
.list h2 a:hover{color:var(--brand)}
.list>h2:first-child{margin-top:8px}
.cards{display:grid;gap:12px;
  grid-template-columns:repeat(auto-fill,minmax(min(100%,255px),1fr))}
.card>a{display:flex;flex-direction:column;gap:5px;height:100%;
  padding:15px 16px;border:1px solid var(--line);border-radius:var(--r);
  text-decoration:none;background:var(--paper)}
.card>a:hover{border-color:var(--brand);background:var(--brand-w)}
.card-t{font-weight:600;color:var(--ink);font-size:15.5px;line-height:1.35}
.card-m{font-size:13px;color:var(--ink-3)}

/* --------------------------------------------------------------- worksheet */
.ws{margin:26px 0 0}
.ws-bar{display:flex;flex-wrap:wrap;align-items:center;gap:12px;
  padding-bottom:12px;border-bottom:2px solid var(--ink);margin-bottom:0}
.ws-bar h2{font-size:20px;margin-right:auto}
.ws-ctl{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.ctl{display:inline-flex;align-items:center;gap:7px;font-size:13.5px;
  font-weight:600;color:var(--ink-2)}
.ctl select{border:1px solid var(--line);border-radius:8px;padding:8px 9px;
  background:var(--paper);color:var(--ink);font-size:14.5px}

.sheet{border:1px solid var(--line);border-top:none;border-radius:0 0 var(--r) var(--r);
  padding:clamp(18px,3vw,32px);background:var(--paper)}
.sheet-h{display:flex;flex-wrap:wrap;gap:10px 24px;align-items:baseline;
  justify-content:space-between;padding-bottom:14px;margin-bottom:22px;
  border-bottom:1px solid var(--line)}
.sh-t{font-family:var(--serif);font-weight:700;font-size:19px;margin:0}
.sh-m{display:flex;gap:18px;margin:0;font-size:13px;color:var(--ink-3)}
.sh-m span{border-bottom:1px solid var(--line);min-width:90px;padding-bottom:1px}
.sheet-f{margin:24px 0 0;padding-top:12px;border-top:1px solid var(--line-2);
  font-size:11.5px;color:var(--ink-3);text-align:center;letter-spacing:.02em}

.probs{display:grid;gap:22px 18px;
  grid-template-columns:repeat(var(--per,4),minmax(0,1fr))}
.probs.lay-wide{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.probs.lay-word,.probs.lay-full{grid-template-columns:minmax(0,1fr);gap:20px}
.probs.lay-clock,.probs.lay-coins{grid-template-columns:repeat(4,minmax(0,1fr))}
.probs.lay-ld{grid-template-columns:repeat(3,minmax(0,1fr));gap:30px 22px}
@media (max-width:760px){
  .probs,.probs.lay-clock,.probs.lay-coins,.probs.lay-ld{
    grid-template-columns:repeat(2,minmax(0,1fr))}
  .probs.lay-wide{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:400px){
  .probs.lay-ld{grid-template-columns:minmax(0,1fr)}
}

.pr{display:flex;gap:9px;align-items:flex-start;min-width:0}
.pr-n{flex:0 0 auto;font-size:12px;font-weight:700;color:var(--ink-3);
  font-family:var(--mono);padding-top:3px;min-width:1.6em}

/* column arithmetic */
.cl{display:inline-grid;justify-items:end;font-family:var(--mono);
  font-size:clamp(16px,1.9vw,19px);line-height:1.5;min-width:0}
.cl-a,.cl-b{display:block;white-space:nowrap}
.cl-b{position:relative;padding-left:1.3em}
.cl-op{position:absolute;left:0;color:var(--ink-2)}
.cl-r{display:block;border-top:2px solid var(--ink);width:100%;min-width:3.4em;
  height:1.7em}

/* inline horizontal problem */
.ih{display:flex;flex-wrap:wrap;align-items:center;gap:7px;font-family:var(--mono);
  font-size:clamp(15px,1.8vw,17.5px);min-width:0}
.hint{font-family:var(--sans);font-size:12.5px;color:var(--ink-3);font-style:italic}

/* answer box */
.bx{display:inline-block;width:3.2em;height:1.65em;border:1.5px solid var(--ink-3);
  border-radius:4px;vertical-align:-.45em;background:var(--paper-2)}
.bx.sm{width:1.9em;height:1.5em;vertical-align:-.35em}

/* fractions */
.fr{display:inline-flex;flex-direction:column;align-items:center;
  vertical-align:middle;line-height:1.15;font-family:var(--mono)}
.fr-n{padding:0 .35em}
.fr-d{padding:0 .35em;border-top:1.6px solid var(--ink)}

/* long division */
.ld{display:inline-flex;align-items:stretch;font-family:var(--mono);
  font-size:clamp(16px,1.9vw,19px)}
/* The divisor sits on the dividend's own line, not at the foot of the
   bracket -- flex-end pushed it down past the working space. */
.ld-d{padding:.22em .4em 0 0;align-self:flex-start;line-height:1.5}
.ld-n{border-top:2px solid var(--ink);border-left:2px solid var(--ink);
  border-top-left-radius:60% 40%;padding:.22em .5em 1.5em .5em;line-height:1.5}

/* number chart */
.ch{display:grid;grid-template-columns:repeat(10,minmax(0,1fr));gap:2px;width:100%}
.ch-c{display:flex;align-items:center;justify-content:center;
  aspect-ratio:1;border:1px solid var(--line);font-family:var(--mono);
  font-size:clamp(10px,1.5vw,13px);background:var(--paper)}
.ch-b{background:var(--paper-2);border-color:var(--ink-3);border-width:1.5px}

/* clocks and coins */
.lay-clock .pr{flex-direction:column;align-items:center;gap:3px}
.lay-clock .pr-n{align-self:flex-start}
.clk{display:block;width:100%;max-width:118px;height:auto;color:var(--ink)}
.clk-l{display:block;border-bottom:1.5px solid var(--line);height:1.8em;
  width:min(100%,106px);margin:4px auto 0}
.coins{display:flex;flex-wrap:wrap;gap:5px}
.coin{width:38px;height:38px;color:var(--ink-2)}

/* word search */
.wsg{display:grid;grid-template-columns:repeat(var(--size,14),minmax(0,1fr));
  gap:1px;width:100%;max-width:640px;margin:0 auto}
.ws-c{display:flex;align-items:center;justify-content:center;aspect-ratio:1;
  font-family:var(--mono);font-size:clamp(9px,1.5vw,14px);font-weight:600;
  color:var(--ink);letter-spacing:.02em}
.wsl{display:flex;flex-wrap:wrap;gap:6px 14px;justify-content:center;
  margin-top:clamp(16px,2.2vw,24px);padding-top:14px;border-top:1px solid var(--line)}
.wsl span{font-family:var(--mono);font-size:13px;font-weight:600;
  letter-spacing:.04em;color:var(--ink-2)}

/* scramble / missing letters */
.scr{font-family:var(--mono);font-size:clamp(15px,2vw,18px);letter-spacing:.12em;
  font-weight:700}
.bx.wide{width:7em}

/* alphabetical order */
.abc{display:block}
.abc-w{display:inline-block;font-family:var(--mono);font-size:15px;
  padding:3px 10px;margin:0 6px 6px 0;border:1px solid var(--line);border-radius:6px;
  background:var(--paper-2)}
.abc-l{display:block;border-bottom:1.5px solid var(--line);height:2em;margin-top:6px}

/* grammar */
.gw{display:block;font-size:16px;line-height:1.7}
.opts{display:block;margin-top:8px;font-size:14px;color:var(--ink-2)}
.opts .bx{vertical-align:-.35em;margin-right:4px}

/* reading */
.probs.lay-read{grid-template-columns:minmax(0,1fr);gap:16px}
.psg{display:block;max-width:64ch;font-size:16.5px;line-height:1.75}
.psg b{display:block;font-family:var(--serif);font-size:19px;margin-bottom:10px}
.psg p{margin:0 0 12px}
.lay-read .pr:first-child{background:var(--paper-2);border:1px solid var(--line);
  border-radius:var(--r);padding:clamp(14px,2vw,22px);margin-bottom:10px}
.lay-read .pr:first-child .pr-n{display:none}
.wp-l.tall{height:3.2em}
.lay-read .wp-l{max-width:none}
.lay-full .pr-n{display:none}

/* handwriting */
.probs.lay-hand{grid-template-columns:minmax(0,1fr);gap:clamp(14px,2vw,22px)}
.lay-hand .pr{flex-direction:column;align-items:stretch;gap:5px}
.lay-hand .pr-n{align-self:flex-start}
.hw-l{font-size:13px;font-weight:600;color:var(--ink-3);letter-spacing:.01em}
.hw{display:block;width:100%;height:auto;color:var(--ink)}
.blanks{display:grid;gap:clamp(14px,2vw,22px);margin-top:clamp(14px,2vw,22px)}
.bl{display:block}
.bl[hidden]{display:none}

/* word problems */
.wp{display:block;font-size:16px;line-height:1.6}
.wp-l{display:block;border-bottom:1.5px solid var(--line);height:2.1em;margin-top:8px;
  max-width:16em}

/* answer key */
.key{margin:16px 0 0;border:1px solid var(--line);border-radius:var(--r);
  background:var(--paper-2)}
.key>summary{cursor:pointer;padding:13px 16px;font-weight:600;font-size:15px;
  list-style:none}
.key>summary::-webkit-details-marker{display:none}
.key>summary::before{content:"\25b8";display:inline-block;margin-right:9px;
  color:var(--ink-3);transition:transform .15s}
.key[open]>summary::before{transform:rotate(90deg)}
.key-c{font-weight:400;color:var(--ink-3);font-size:13.5px}
.keys{display:grid;gap:7px 16px;padding:4px 16px 18px;font-family:var(--mono);
  font-size:13.5px;grid-template-columns:repeat(auto-fill,minmax(min(100%,118px),1fr))}
.keys b{color:var(--ink-3);font-weight:700;margin-right:3px}

/* ------------------------------------------------------------------- notes */
.notes{margin:40px 0 0;max-width:72ch}
.notes p{color:var(--ink-2);margin:0 0 14px}
.mist{display:grid;gap:9px;margin:0 0 10px}
.mist li{position:relative;padding-left:26px;color:var(--ink-2)}
.mist li::before{content:"";position:absolute;left:6px;top:.62em;width:7px;height:7px;
  border-radius:2px;background:var(--accent)}
.rel{margin:40px 0 0}

.prose{max-width:70ch;padding:14px 0 10px}
.prose h1{font-size:clamp(27px,4.2vw,38px);margin-bottom:6px}
.prose h2{font-size:clamp(19px,2.1vw,23px);margin:34px 0 10px}
.prose p{color:var(--ink-2);margin:0 0 15px}
.prose .lede{color:var(--ink-2);margin:14px 0 4px}

/* --------------------------------------------------------------------- ads */
.ad{margin:26px 0;min-height:0}
.ad-footer{max-width:var(--wrap);margin:26px auto;padding:0 var(--gut)}

/* ------------------------------------------------------------------ footer */
footer.site{border-top:1px solid var(--line);background:var(--paper-2);
  padding:40px 0 34px}
.fcols{max-width:var(--wrap);margin:0 auto;padding:0 var(--gut);
  display:grid;gap:28px;grid-template-columns:repeat(auto-fit,minmax(min(100%,200px),1fr))}
.fcols h2{font-size:14px;text-transform:uppercase;letter-spacing:.06em;
  font-family:var(--sans);color:var(--ink-3);margin:0 0 12px}
.fcols ul{display:grid;gap:8px}
.fcols a{color:var(--ink-2);text-decoration:none;font-size:14.5px}
.fcols a:hover{color:var(--brand);text-decoration:underline}
.fnote{max-width:var(--wrap);margin:32px auto 0;padding:20px var(--gut) 0;
  border-top:1px solid var(--line);font-size:13.5px;color:var(--ink-3)}

/* no-JS: the controls do nothing without script, so hide them rather than
   offering a dead button. The sheet itself is already in the HTML. */
html:not(.js) .ws-ctl{display:none}

/* ------------------------------------------------------------------- print */
@media print{
  :root{--gut:0}
  @page{margin:12mm 11mm}
  html,body{background:#fff;color:#000;font-size:12pt}
  header.site,footer.site,.crumbs,.ws-bar,.key,.notes,.rel,.ad,.skip,
  .pills,.lede,.hero-ctas,.list{display:none!important}
  main{max-width:none;padding:0}
  .ws{margin:0}
  .sheet{border:none;padding:0;border-radius:0}
  .sheet-h{border-bottom:1.5pt solid #000;margin-bottom:7mm;padding-bottom:3mm}
  .sh-t{font-size:15pt}
  .sh-m{font-size:9pt;gap:10mm}
  .sh-m span{min-width:28mm;border-bottom:.5pt solid #555}
  .probs{gap:7mm 6mm}
  .probs.lay-ld{gap:10mm 7mm}
  .pr{break-inside:avoid;page-break-inside:avoid}
  .pr-n{font-size:8pt;color:#666}
  .cl,.ih,.ld{font-size:13pt}
  .cl-r,.ld-n,.ld-d,.fr-d{border-color:#000}
  .bx{border-color:#555;background:#fff}
  .ch-c{border-color:#999;font-size:9pt}
  .ch-b{background:#fff;border-color:#000}
  .clk{max-width:30mm;color:#000}
  .hw{color:#000}
  .ws-c{font-size:10pt;color:#000}
  .wsl span{font-size:9.5pt}
  .wsg{max-width:none}
  .psg{font-size:11.5pt;max-width:none}
  .lay-read .pr:first-child{background:#fff;border:none;padding:0}
  .gw{font-size:11.5pt}
  .abc-w{background:#fff;border-color:#999}
  .hw-l{font-size:9pt;color:#555}
  .blanks{gap:5mm;margin-top:5mm}
  .bl{break-inside:avoid;page-break-inside:avoid}
  .clk-l{border-color:#666}
  .coin{color:#000}
  .wp{font-size:11.5pt}
  .wp-l{border-color:#666}
  .sheet-f{color:#777;font-size:8pt;border-top:.5pt solid #ccc}
  a{color:#000;text-decoration:none}
}