/* PrintSpark Kids — site styles
   Palette: blue/yellow/green, rounded sans, kid-friendly. */
:root{
  --bg:#f5fbff;
  --surface:#ffffff;
  --ink:#0f1d3a;
  --ink-soft:#3b4a6b;
  --muted:#7986a8;
  --line:#e3ecf7;
  --line-soft:#eef4fb;

  --blue:#2563eb;
  --blue-deep:#1d4ed8;
  --blue-soft:#dbeafe;
  --yellow:#facc15;
  --yellow-deep:#b8860b;
  --yellow-soft:#fef3c7;
  --green:#16a34a;
  --green-deep:#15803d;
  --green-soft:#dcfce7;
  --pink:#ec4899;

  --shadow:0 1px 0 rgba(15,29,58,.04), 0 10px 30px -18px rgba(15,29,58,.25);
  --shadow-lift:0 4px 0 rgba(15,29,58,.04), 0 16px 40px -20px rgba(37,99,235,.35);
  --radius:18px;
  --radius-sm:12px;
  --max:1200px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
html,body{margin:0;padding:0}
body{
  background:var(--bg);
  color:var(--ink);
  font:16px/1.6 "Nunito","Quicksand",ui-rounded,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--blue-deep);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:var(--max);margin:0 auto;padding:0 22px}

/* a11y helpers */
.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--ink);color:#fff;padding:10px 16px;border-radius:0 0 12px 0;font-weight:800;z-index:100}
.skip-link:focus{left:0;text-decoration:none}
:focus-visible{outline:3px solid var(--blue);outline-offset:2px;border-radius:4px}
button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid var(--blue);outline-offset:2px}
/* Anchor jumps land below the sticky header */
:target,h1,h2,h3,[id]{scroll-margin-top:120px}
h1,h2,h3,h4{font-family:"Quicksand","Nunito",ui-rounded,system-ui,sans-serif;font-weight:800;letter-spacing:-.01em;color:var(--ink)}

/* header */
.site-header{background:linear-gradient(180deg,#fff 0,#f5fbff 100%);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50;backdrop-filter:saturate(140%) blur(6px)}
.header-inner{display:flex;align-items:center;gap:18px;padding:12px 22px}
.brand{display:inline-flex;align-items:center;gap:10px;font-family:"Quicksand","Nunito",sans-serif;font-weight:800;color:var(--ink);font-size:21px;text-decoration:none;flex-shrink:0}
.brand-mark{display:inline-grid;place-items:center;width:38px;height:38px;border-radius:12px;background:var(--blue);color:#fff;font-size:20px;box-shadow:0 4px 0 var(--blue-deep)}
.brand:hover{text-decoration:none}
.primary-nav{display:flex;gap:4px;margin-left:auto}
.primary-nav a{color:var(--ink);font-weight:700;font-size:15px;padding:10px 12px;border-radius:10px;min-height:44px;display:inline-flex;align-items:center}
.primary-nav a:hover{color:var(--blue-deep);background:var(--blue-soft);text-decoration:none}
.search{flex-shrink:0}
.search input{border:2px solid var(--line);background:#fff;border-radius:999px;padding:10px 18px;font:inherit;width:230px;color:var(--ink);transition:border-color .15s, box-shadow .15s;min-height:44px}
.search input:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 4px var(--blue-soft)}

/* mobile menu toggle (no JS, pure <details>) */
.nav-toggle{display:none;position:relative;margin-left:auto}
.nav-toggle summary{list-style:none;cursor:pointer;width:44px;height:44px;display:grid;place-items:center;border-radius:12px;background:var(--blue-soft);color:var(--blue-deep)}
.nav-toggle summary::-webkit-details-marker{display:none}
.nav-toggle-bars{display:inline-flex;flex-direction:column;gap:4px;width:20px}
.nav-toggle-bars span{display:block;height:3px;background:var(--blue-deep);border-radius:2px;transition:transform .18s ease, opacity .18s ease}
.nav-toggle[open] summary{background:var(--blue);color:#fff}
.nav-toggle[open] .nav-toggle-bars span{background:#fff}
.nav-toggle[open] .nav-toggle-bars span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[open] .nav-toggle-bars span:nth-child(2){opacity:0}
.nav-toggle[open] .nav-toggle-bars span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.nav-toggle-panel{position:absolute;right:0;top:calc(100% + 10px);background:#fff;border:2px solid var(--line);border-radius:16px;padding:10px;display:flex;flex-direction:column;min-width:220px;box-shadow:0 18px 40px -16px rgba(15,29,58,.25);z-index:60}
.nav-toggle-panel a{padding:12px 14px;border-radius:10px;color:var(--ink);font-weight:700;min-height:44px;display:flex;align-items:center}
.nav-toggle-panel a:hover{background:var(--blue-soft);color:var(--blue-deep);text-decoration:none}

.grade-strip{background:var(--ink);color:#fff}
.grade-strip .container{display:flex;gap:12px;padding:10px 22px;align-items:center}
.grade-strip-scroller{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.grade-strip a{color:#fff;font-weight:800;font-size:13px;letter-spacing:.04em;text-transform:uppercase;opacity:.9;padding:6px 12px;border-radius:999px;background:rgba(255,255,255,.08);min-height:32px;display:inline-flex;align-items:center}
.grade-strip a:hover{opacity:1;text-decoration:none;background:var(--blue)}
.grade-strip-label{font-size:12px;text-transform:uppercase;letter-spacing:.12em;opacity:.6;flex-shrink:0}

/* main */
.site-main{padding:30px 0 60px}
.page-head{margin:14px 0 26px}
.page-head h1{font-size:clamp(28px,4vw,46px);margin:8px 0 10px;line-height:1.1}
.eyebrow{text-transform:uppercase;letter-spacing:.12em;font-size:12px;font-weight:800;color:var(--green-deep);margin:0}
.eyebrow a{color:inherit}
.lede{font-size:18px;color:var(--ink-soft);max-width:70ch;margin:0}
.section{margin:48px 0}
.section-head h2{font-size:28px;margin:0 0 6px}
.section-head p{color:var(--ink-soft);margin:0 0 18px;max-width:60ch}
.section-head-row{display:flex;justify-content:space-between;align-items:end;gap:12px;flex-wrap:wrap}
.section-link{font-weight:800;color:var(--blue-deep)}

/* hero */
.hero{display:grid;grid-template-columns:1.1fr .9fr;gap:36px;align-items:center;
  background:
    radial-gradient(circle at 85% 20%,rgba(250,204,21,.45) 0,transparent 38%),
    radial-gradient(circle at 15% 80%,rgba(22,163,74,.30) 0,transparent 40%),
    linear-gradient(135deg,#dbeafe 0,#eff6ff 60%,#dcfce7 100%);
  border:2px solid var(--line);border-radius:28px;padding:42px;box-shadow:var(--shadow-lift)}
.hero h1{font-size:clamp(34px,5.2vw,58px);line-height:1.02;margin:10px 0 14px}
.hero h1 .hl{color:var(--blue-deep);background:linear-gradient(120deg,transparent 60%,var(--yellow) 60%);padding:0 .12em;border-radius:6px}
.hero .lede{font-size:18px;max-width:50ch}
.hero-cta{display:flex;gap:12px;margin:20px 0 24px;flex-wrap:wrap}
.btn{display:inline-block;padding:13px 22px;border-radius:999px;font-weight:800;text-decoration:none;border:0;transition:transform .08s ease, box-shadow .15s ease;cursor:pointer;font:inherit;font-weight:800}
.btn:hover{text-decoration:none;transform:translateY(-2px)}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 4px 0 var(--blue-deep)}
.btn-primary:hover{box-shadow:0 6px 0 var(--blue-deep)}
.btn-ghost{background:#fff;color:var(--ink);border:2px solid var(--line);box-shadow:0 4px 0 var(--line)}
.btn-ghost:hover{border-color:var(--blue);box-shadow:0 6px 0 var(--blue-soft)}
.btn-yellow{background:var(--yellow);color:#5a4500;box-shadow:0 4px 0 var(--yellow-deep)}
.hero-stats{list-style:none;display:flex;gap:14px;margin:0;padding:0;flex-wrap:wrap}
.hero-stats li{background:#fff;border:2px solid var(--line);padding:12px 16px;border-radius:14px;min-width:108px;display:flex;flex-direction:column;box-shadow:0 4px 0 var(--line)}
.hero-stats strong{font-size:24px;color:var(--blue-deep);font-family:"Quicksand",sans-serif}
.hero-stats span{font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.1em;font-weight:700}
.hero-art{position:relative}
.hero-art img{border-radius:22px;box-shadow:0 24px 50px -22px rgba(15,29,58,.4);border:4px solid #fff}

/* grade cards */
.grade-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:14px}
.grade-card{display:flex;flex-direction:column;gap:6px;padding:20px;border-radius:var(--radius);background:#fff;border:2px solid var(--line);box-shadow:0 4px 0 var(--line);text-decoration:none;color:var(--ink);transition:transform .1s, border-color .1s, box-shadow .1s}
.grade-card:hover{transform:translateY(-3px);border-color:var(--blue);box-shadow:0 7px 0 var(--blue-soft);text-decoration:none}
.grade-card-key{display:inline-grid;place-items:center;width:42px;height:42px;border-radius:12px;background:var(--yellow);color:#5a4500;font-weight:800;font-family:"Quicksand",sans-serif;font-size:18px;box-shadow:0 3px 0 var(--yellow-deep)}
.grade-card-key.is-blue{background:var(--blue);color:#fff;box-shadow:0 3px 0 var(--blue-deep)}
.grade-card-key.is-green{background:var(--green);color:#fff;box-shadow:0 3px 0 var(--green-deep)}
.grade-card-label{font-weight:800;font-size:18px;font-family:"Quicksand",sans-serif}
.grade-card-count{color:var(--muted);font-size:13px;font-weight:600}

/* worksheet card grid */
.grid-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(248px,1fr));gap:18px}
.card{position:relative;background:#fff;border:2px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;box-shadow:0 3px 0 var(--line);transition:transform .12s ease, border-color .12s ease, box-shadow .12s ease}
.card-title a{position:relative}
.card-title a::after{content:"";position:absolute;inset:0;border-radius:inherit;z-index:1}
.card:focus-within{border-color:var(--blue);box-shadow:0 6px 0 var(--blue-soft);transform:translateY(-3px)}
.card-title a:focus-visible{outline:none}
.card-title a:focus-visible::after{outline:3px solid var(--blue-deep);outline-offset:3px}
.card:hover{transform:translateY(-3px);border-color:var(--blue);box-shadow:0 6px 0 var(--blue-soft)}
.card-thumb{aspect-ratio:5/3;background:linear-gradient(135deg,#fff,var(--blue-soft));display:grid;place-items:center;padding:14px;border-bottom:2px dashed var(--line)}
.thumb-grid{display:flex;flex-direction:column;gap:6px;width:100%;font-family:"Courier New",ui-monospace,monospace;font-weight:700;color:var(--ink);font-size:14px;text-align:left}
.thumb-line{background:#fff;border:1px solid var(--line);border-radius:8px;padding:5px 9px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.card-body{padding:14px 16px 16px;display:flex;flex-direction:column;gap:8px;flex:1}
.card-tags{display:flex;gap:6px;flex-wrap:wrap}
.tag{font-size:11px;text-transform:uppercase;letter-spacing:.08em;font-weight:800;padding:4px 9px;border-radius:999px}
.tag-grade{background:var(--yellow-soft);color:var(--yellow-deep)}
.tag-skill{background:var(--green-soft);color:var(--green-deep)}
.tag-cc{background:var(--blue-soft);color:var(--blue-deep)}
.card-title{margin:0;font-size:17px;line-height:1.25}
.card-title a{color:var(--ink)}
.card-title a:hover{color:var(--blue-deep);text-decoration:none}
.card-desc{margin:0;color:var(--ink-soft);font-size:14px;flex:1}
.card-more{font-weight:800;color:var(--blue-deep)}

/* chips */
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0 22px}
.chip{padding:8px 16px;background:#fff;border:2px solid var(--line);border-radius:999px;font-weight:700;font-size:14px;color:var(--ink);box-shadow:0 2px 0 var(--line)}
.chip:hover{border-color:var(--blue);color:var(--blue-deep);text-decoration:none;box-shadow:0 4px 0 var(--blue-soft)}

/* layout-with-sidebar */
.layout-with-sidebar{display:grid;grid-template-columns:1fr 290px;gap:30px;align-items:start}
.sidebar{display:flex;flex-direction:column;gap:14px;position:sticky;top:96px}
.sidebar-block{background:#fff;border:2px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:0 3px 0 var(--line);font-size:14px;color:var(--ink-soft)}
.sidebar-block h3,.sidebar-block .sidebar-heading{margin:0 0 10px;font-size:15px;font-weight:800;color:var(--ink);font-family:"Quicksand",sans-serif;text-transform:uppercase;letter-spacing:.04em}
.card-title{font-size:18px;line-height:1.25;margin:0 0 8px}
.byline{margin:8px 0 0;color:var(--muted);font-size:13px}
.sidebar-block ul{margin:0;padding-left:18px;display:grid;gap:6px}
.sidebar-block ul.unstyled{padding-left:0;list-style:none}
.kv{display:grid;grid-template-columns:auto 1fr;gap:5px 12px;margin:0}
.kv dt{color:var(--muted);font-weight:700;text-transform:uppercase;font-size:11px;letter-spacing:.06em;align-self:center}
.kv dd{margin:0;color:var(--ink);font-weight:600}

/* prose */
.prose{max-width:75ch;color:var(--ink-soft);font-size:16.5px;line-height:1.75}
.prose h1,.prose h2,.prose h3{color:var(--ink);line-height:1.2;margin-top:1.6em}
.prose h2{font-size:26px}
.prose h3{font-size:20px}
.prose ul,.prose ol{padding-left:22px}
.prose code{background:var(--blue-soft);color:var(--blue-deep);padding:1px 7px;border-radius:6px;font-size:.9em}
.prose a{color:var(--blue-deep);font-weight:700}

/* worksheet preview */
.worksheet-article .worksheet-preview{background:#fff;border:2px solid var(--line);border-radius:var(--radius);padding:20px;margin:0 0 22px;box-shadow:var(--shadow)}
.worksheet-preview header{border-bottom:2px dashed var(--line);padding-bottom:10px;margin-bottom:12px}
.worksheet-preview h2{margin:0;font-size:22px}
.problem-list{list-style:decimal;padding-left:24px;margin:8px 0;display:grid;grid-template-columns:1fr 1fr;gap:8px 22px;font-family:"Courier New",ui-monospace,monospace;font-size:15px;color:var(--ink)}
.problem-list li{padding:4px 0}
.tag-row{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:6px}
.muted{color:var(--muted)}
.small{font-size:13px}

/* breadcrumbs */
.breadcrumbs{font-size:13px;color:var(--muted);margin:6px 0 0;font-weight:600}
.breadcrumbs a{color:var(--ink-soft)}
.breadcrumbs .bc-sep{margin:0 6px;opacity:.5}

/* lists on hub pages */
.grade-list,.skill-list{display:grid;gap:16px}
.grade-list-item,.skill-list-item{background:#fff;border:2px solid var(--line);border-radius:var(--radius);padding:22px;display:grid;grid-template-columns:240px 1fr;gap:22px;box-shadow:0 4px 0 var(--line)}
.skill-list-item{grid-template-columns:1fr}
.grade-list-key{display:inline-grid;place-items:center;width:48px;height:48px;border-radius:14px;background:var(--yellow);color:#5a4500;font-weight:800;font-family:"Quicksand",sans-serif;margin-bottom:8px;box-shadow:0 3px 0 var(--yellow-deep)}
.grade-list-meta h2,.skill-list-item h2{margin:0 0 4px;font-size:24px}
.grade-list-meta h2 a,.skill-list-item h2 a{color:var(--ink)}
.grade-list-meta h2 a:hover,.skill-list-item h2 a:hover{color:var(--blue-deep);text-decoration:none}
.grade-list-meta p,.skill-list-item p{color:var(--ink-soft);margin:0}
.grade-list-skills{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:10px}
.grade-list-skills li{background:var(--blue-soft);border-radius:12px;padding:10px 14px;font-size:14px;display:flex;flex-direction:column}
.grade-list-skills li a{color:var(--blue-deep);font-weight:700}
.grade-list-skills li span{color:var(--muted);font-size:11px;letter-spacing:.05em;text-transform:uppercase;font-weight:700}
.skill-list-grades{list-style:none;display:flex;flex-wrap:wrap;gap:8px;padding:0;margin:10px 0 0}
.skill-list-grades li a{background:var(--green-soft);color:var(--green-deep);padding:6px 14px;border-radius:999px;font-weight:700;font-size:13px}
.skill-list-grades li a:hover{background:var(--green);color:#fff;text-decoration:none}

/* pager */
.pager{display:flex;gap:6px;flex-wrap:wrap;justify-content:center;margin:24px 0}
.pager-link{padding:8px 14px;border-radius:10px;background:#fff;border:2px solid var(--line);color:var(--ink);font-weight:700;text-decoration:none;font-size:14px}
.pager-link:hover{border-color:var(--blue);text-decoration:none}
.pager-link.is-current{background:var(--blue);color:#fff;border-color:var(--blue)}

/* footer */
.site-footer{background:var(--ink);color:#cbd6ee;padding:42px 0 28px;margin-top:60px}
.footer-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:32px}
.site-footer h4{color:#fff;font-size:13px;text-transform:uppercase;letter-spacing:.1em;margin:0 0 10px;font-family:"Quicksand",sans-serif}
.site-footer ul{list-style:none;padding:0;margin:0;display:grid;gap:7px;font-size:14px}
.site-footer a{color:#cbd6ee}
.site-footer a:hover{color:#fff}
.brand-footer .brand-text{color:#fff}
.footer-tag{color:#94a3c4;margin:8px 0 12px;font-size:14px}
.footer-col-title{font-family:"Quicksand",sans-serif;font-size:15px;font-weight:800;text-transform:uppercase;letter-spacing:.04em;color:#cbd5ff;margin:0 0 10px;padding:0}
.footer-copy{color:#7e8aad;font-size:12px}
.footer-pbn{margin-top:14px;font-size:12px;color:#7e8aad;display:flex;gap:10px;flex-wrap:wrap}

/* search big */
.search-big{display:flex;gap:8px;max-width:520px;margin:8px 0}
.search-big input{flex:1;font-size:16px;padding:12px 18px}

/* misc */
.callout{background:linear-gradient(135deg,var(--yellow-soft),#fff);border:2px solid var(--yellow);border-radius:var(--radius);padding:18px 22px;margin:22px 0;color:var(--ink)}
.callout strong{color:var(--yellow-deep)}

/* responsive */
@media (max-width: 1080px){
  .primary-nav{gap:2px}
  .primary-nav a{padding:10px 9px;font-size:14px}
  .search input{width:180px}
}
@media (max-width: 980px){
  .hero{grid-template-columns:1fr;padding:28px;gap:24px}
  .hero-art{max-width:520px;margin:0 auto;width:100%}
  .layout-with-sidebar{grid-template-columns:1fr}
  .sidebar{position:static}
  .grade-list-item{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:24px}
  .primary-nav{display:none}
  .nav-toggle{display:block}
  .search{margin-left:auto}
  .search input{width:200px}
  .problem-list{grid-template-columns:1fr}
  .section{margin:36px 0}
}
@media (max-width: 720px){
  :root{--radius:14px}
  .container{padding:0 16px}
  .site-main{padding:18px 0 40px}
  .header-inner{padding:10px 16px;gap:10px;flex-wrap:wrap}
  .brand-text{font-size:18px}
  .brand-mark{width:34px;height:34px;font-size:18px}
  .search{order:3;flex-basis:100%;margin-left:0}
  .search input{width:100%}
  .nav-toggle{margin-left:auto;order:2}
  .grade-strip .container{padding:10px 16px}
  /* Horizontal scroll for grade pills — saves vertical real-estate */
  .grade-strip-scroller{flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch;padding-bottom:2px}
  .grade-strip-scroller::-webkit-scrollbar{display:none}
  .grade-strip a{flex-shrink:0;min-height:44px;padding:10px 14px}
  .grade-strip-label{display:none}
  .footer-grid a,.footer-grid li{min-height:44px;display:flex;align-items:center;padding:2px 0}
  .hero{padding:24px 20px;border-radius:22px}
  .hero h1{font-size:clamp(28px,8vw,40px)}
  .hero .lede{font-size:16px}
  .hero-cta .btn{flex:1;text-align:center;min-width:140px}
  .hero-stats{gap:8px}
  .hero-stats li{flex:1;min-width:calc(50% - 8px);padding:10px 12px}
  .hero-stats strong{font-size:20px}
  .grid-cards{grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:12px}
  .card-body{padding:12px 14px 14px}
  .card-title{font-size:15px}
  .card-thumb{padding:10px}
  .thumb-line{font-size:12px;padding:4px 7px}
  .grade-cards{grid-template-columns:repeat(2,1fr);gap:10px}
  .grade-card{padding:14px}
  .section-head h2,.prose h2{font-size:22px}
  .page-head h1,.hero h1{line-height:1.1}
  .breadcrumbs{font-size:12px}
  .breadcrumbs .bc-sep{margin:0 4px}
  .footer-grid{grid-template-columns:1fr;gap:20px}
  .site-footer{padding:32px 0 24px}
  .worksheet-article .worksheet-preview{padding:16px}
  .sidebar-block{padding:14px}
  .btn{padding:12px 18px}
}
@media (max-width: 420px){
  .hero{padding:20px 16px}
  .grade-cards{grid-template-columns:1fr}
  .grid-cards{grid-template-columns:1fr}
}

/* Larger laptops + desktops */
@media (min-width: 1280px){
  .grid-cards{grid-template-columns:repeat(auto-fill,minmax(260px,1fr))}
}

/* Honor user motion preferences */
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important;scroll-behavior:auto !important}
  .card:hover,.grade-card:hover,.btn:hover{transform:none}
}

/* Print — when teachers/parents Ctrl+P a worksheet page, hide chrome and ads */
@media print{
  .site-header,.site-footer,.sidebar,.hero-cta,.breadcrumbs,
  .nav-toggle,.primary-nav,.search,.grade-strip,
  .footer-pbn,.callout,.pager,
  [class*="adsense"],[id*="adsense"]{display:none !important}
  body{background:#fff;color:#000;font-size:12pt}
  a{color:#000;text-decoration:none}
  .container{max-width:100%;padding:0}
  .site-main{padding:0}
  .layout-with-sidebar{display:block}
  .worksheet-article .worksheet-preview{border:1px solid #000;box-shadow:none;page-break-inside:avoid}
  .problem-list{grid-template-columns:1fr 1fr;font-size:14pt}
  h1,h2,h3{color:#000;page-break-after:avoid}
  .tag{border:1px solid #000;background:#fff !important;color:#000 !important}
}