:root{--bg:#f6f3ee;--ink:#243033;--muted:#657377;--line:#e3ddd2;--accent:#5c7ac8;--soft:#e8f0ff;--shadow:0 20px 50px rgba(48,39,28,.12)}*{box-sizing:border-box}body{margin:0;font-family:Inter,system-ui,sans-serif;color:var(--ink);background:radial-gradient(circle at top left,#fff7df 0,transparent 34%),var(--bg)}.site-header{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:34px clamp(18px,5vw,64px) 20px}.eyebrow{margin:0 0 6px;color:var(--accent);font-size:12px;font-weight:900;letter-spacing:.13em;text-transform:uppercase}h1,h2,h3{margin:0;line-height:1.08}h1{font-size:clamp(32px,5vw,58px);letter-spacing:-.055em}.subtitle{max-width:780px;margin:12px 0 0;color:var(--muted);line-height:1.6}button{border:0;border-radius:16px;font-weight:900;cursor:pointer;transition:.18s}button:hover{transform:translateY(-1px)}.primary-btn{padding:14px 18px;background:var(--ink);color:#fff;box-shadow:0 12px 28px rgba(36,48,51,.22);white-space:nowrap}.secondary-btn{padding:11px 14px;background:#fff;color:var(--ink);border:1px solid var(--line)}.full{width:100%}.app-shell{display:grid;grid-template-columns:minmax(300px,390px) 1fr;gap:24px;padding:20px clamp(18px,5vw,64px) 60px;align-items:start}.control-panel{position:sticky;top:18px;display:grid;gap:16px;max-height:calc(100vh - 36px);overflow-y:auto;padding-right:8px}.panel-card,.preview-area{background:rgba(255,255,255,.9);border:1px solid rgba(229,222,212,.92);border-radius:28px;box-shadow:var(--shadow)}.panel-card{padding:22px}.panel-card h2{font-size:18px;margin-bottom:18px}label{display:grid;gap:8px;margin:14px 0;color:#405054;font-size:13px;font-weight:850}input,select{width:100%;border:1px solid var(--line);background:#fff;border-radius:14px;padding:12px 13px;color:var(--ink);font:inherit}.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:12px}.option-card{margin:16px 0;padding:12px 14px;border-radius:18px;background:var(--soft);border:1px solid rgba(92,122,200,.16)}.toggle-row{display:flex;align-items:center;gap:10px;margin:10px 0}.toggle-row input{width:18px;height:18px;accent-color:var(--accent)}.button-row{display:grid;gap:10px;margin-top:16px}.info-list{display:grid;gap:9px;color:var(--muted);font-size:13px;font-weight:750}.info-list div{display:flex;justify-content:space-between;gap:14px;padding-bottom:9px;border-bottom:1px solid var(--line)}.info-list strong{color:var(--ink)}.preview-area{padding:22px;overflow:auto}.preview-toolbar{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-bottom:18px}.preview-toolbar h2{font-size:24px;letter-spacing:-.03em}.toolbar-actions{display:flex;flex-wrap:wrap;align-items:center;justify-content:flex-end;gap:10px}.page-indicator{padding:10px 13px;background:var(--soft);border-radius:999px;font-size:12px;font-weight:900}.worksheet-preview{display:grid;gap:22px;justify-items:center;padding:14px 0 30px}.page{position:relative;width:8.5in;height:11in;padding:.42in .42in .58in;background:#fffdf9;border-radius:14px;box-shadow:0 16px 45px rgba(52,43,34,.16);overflow:hidden;page-break-after:always;display:flex;flex-direction:column}.letter-size .page{width:8.5in;height:11in}.a4-size .page{width:8.27in;height:11.69in}.a5-size .page{width:5.83in;height:8.27in;padding:.28in .28in .45in}.page:before{content:"";position:absolute;inset:13px;border:2px solid var(--worksheet-line,#d7e2ff);border-radius:22px;pointer-events:none}.worksheet-header{position:relative;z-index:1;display:grid;gap:14px;border-bottom:2px solid var(--worksheet-line,#d7e2ff);padding-bottom:16px;margin-bottom:18px}.title-row{display:flex;justify-content:space-between;align-items:flex-start;gap:16px}.title-row h2{font-size:30px;letter-spacing:-.04em}.skill-badge{background:var(--worksheet-soft,#dff0ff);border-radius:999px;padding:9px 13px;font-size:12px;font-weight:900}.student-row{display:grid;grid-template-columns:1.1fr .7fr .7fr;gap:12px;color:var(--muted);font-size:13px;font-weight:800}.student-line{border-bottom:1.5px solid #d8d8d8;min-height:24px;color:var(--ink)}.instructions{position:relative;z-index:1;background:rgba(255,255,255,.76);border:1.5px solid var(--worksheet-line,#d7e2ff);border-radius:16px;padding:12px 14px;margin-bottom:16px;color:var(--muted);line-height:1.45;font-size:13px;font-weight:750}.problem-grid{position:relative;z-index:1;display:grid;grid-template-columns:1fr 1fr;gap:12px;flex:1 1 auto}.problem-card{border:1.5px solid var(--worksheet-line,#d7e2ff);border-radius:18px;background:rgba(255,255,255,.76);padding:13px;display:flex;flex-direction:column}.problem-number{color:var(--worksheet-accent,#5c7ac8);font-size:11px;font-weight:900;letter-spacing:.08em;text-transform:uppercase;margin-bottom:8px}.problem-text{font-size:20px;font-weight:850;line-height:1.3;margin-bottom:10px}.answer-line{margin-top:auto;border-bottom:1.8px solid #d8d8d8;min-height:28px}.work-space{display:grid;gap:8px;margin-top:12px}.work-space span{border-bottom:1px solid #ddd;min-height:18px}.answer-key-list{position:relative;z-index:1;display:grid;grid-template-columns:repeat(2,1fr);gap:10px 18px;font-size:15px;font-weight:800}.answer-key-list div{padding:10px 12px;border:1px solid var(--worksheet-line,#d7e2ff);border-radius:12px;background:rgba(255,255,255,.78)}.footer-note{position:absolute;z-index:1;bottom:24px;left:0;right:0;text-align:center;color:#a0a0a0;font-size:10px;font-weight:750}.theme-school{--worksheet-accent:#5c7ac8;--worksheet-soft:#dff0ff;--worksheet-line:#d7e2ff}.theme-cute{--worksheet-accent:#d9829d;--worksheet-soft:#ffe0ef;--worksheet-line:#f0d5df}.theme-minimal{--worksheet-accent:#31383d;--worksheet-soft:#f3f3f3;--worksheet-line:#d8dde0}.theme-colorful{--worksheet-accent:#2f8f83;--worksheet-soft:#e2f6ef;--worksheet-line:#cfe8df}.single-page-only .page:not(.active-page){display:none}@media(max-width:1120px){.app-shell{grid-template-columns:1fr}.control-panel{position:static;max-height:none;overflow:visible;padding-right:0}.site-header{flex-direction:column;align-items:flex-start}.page{transform:scale(.82);transform-origin:top center;margin-bottom:-1.8in}}@media(max-width:760px){.grid-2{grid-template-columns:1fr}.preview-toolbar{align-items:flex-start;flex-direction:column}.page{transform:scale(.56);margin-bottom:-4.6in}}@media print{body{background:#fff}.site-header,.control-panel,.preview-toolbar{display:none!important}.app-shell,.preview-area,.worksheet-preview{display:block;padding:0;margin:0;box-shadow:none;border:0;background:#fff}.worksheet-preview.single-page-only .page{display:flex!important}.page{border-radius:0;box-shadow:none;margin:0;transform:none!important;break-after:page;page-break-after:always}.letter-size .page{width:8.5in;height:11in}.a4-size .page{width:8.27in;height:11.69in}.a5-size .page{width:5.83in;height:8.27in}}

/* v5 Sheet Studio-style header link + collapsible sidebar */
.header-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap;justify-content:flex-end}.back-link{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:12px 16px;border-radius:16px;border:1px solid var(--line);background:rgba(255,255,255,.92);color:var(--ink);font-weight:900;text-decoration:none;box-shadow:0 12px 28px rgba(48,39,28,.08);white-space:nowrap;transition:.18s}.back-link:hover{transform:translateY(-1px);background:#fff}.collapsible-panel{padding:0;overflow:hidden}.panel-summary{list-style:none;display:flex;align-items:center;justify-content:space-between;gap:14px;padding:20px 22px;cursor:pointer;user-select:none}.panel-summary::-webkit-details-marker{display:none}.panel-summary:hover{background:rgba(92,122,200,.055)}.panel-content{padding:0 22px 22px}.panel-heading{display:flex;align-items:flex-start;gap:12px}.panel-heading h2{margin:0 0 4px;font-size:18px}.panel-heading p{margin:0;color:var(--muted);font-size:12px;line-height:1.35;font-weight:800}.step-number{display:grid;place-items:center;flex:0 0 auto;width:30px;height:30px;border-radius:999px;background:var(--soft);color:var(--accent);font-weight:900}.collapse-icon{flex:0 0 auto;width:34px;height:34px;border-radius:999px;border:1px solid var(--line);background:#fff;display:inline-grid;place-items:center;box-shadow:0 8px 18px rgba(48,39,28,.06)}.collapse-icon:before{content:"";width:9px;height:9px;border-right:2px solid var(--accent);border-bottom:2px solid var(--accent);transform:rotate(45deg);margin-top:-2px;transition:.18s}.collapsible-panel[open] .collapse-icon:before{transform:rotate(-135deg);margin-top:3px}.collapsible-panel:not([open]) .panel-summary{padding-bottom:18px}@media(max-width:1120px){.header-actions{justify-content:flex-start}}@media(max-width:760px){.panel-summary{padding:18px}.panel-content{padding:0 18px 18px}}


/* v6: keep worksheet questions inside printable page */
.page{
  padding:.36in .36in .52in;
}

.worksheet-header{
  gap:10px;
  padding-bottom:12px;
  margin-bottom:12px;
}

.title-row h2{
  font-size:26px;
}

.student-row{
  min-height:34px;
}

.instructions{
  padding:9px 12px;
  margin-bottom:12px;
  font-size:12px;
  line-height:1.35;
}

.problem-grid{
  gap:9px;
  min-height:0;
}

.problem-card{
  min-height:0;
  padding:10px 12px;
  border-radius:16px;
}

.problem-number{
  font-size:10px;
  margin-bottom:5px;
}

.problem-text{
  font-size:17px;
  line-height:1.18;
  margin-bottom:6px;
  word-break:break-word;
}

.answer-line{
  min-height:20px;
}

.work-space{
  gap:5px;
  margin-top:7px;
}

.work-space span{
  min-height:12px;
}

.footer-note{
  bottom:18px;
  font-size:9.5px;
}

.a5-size .page{
  padding:.24in .24in .4in;
}

.a5-size .title-row h2{
  font-size:20px;
}

.a5-size .problem-text{
  font-size:13px;
}

.a5-size .problem-card{
  padding:7px 8px;
}

.a5-size .work-space span{
  min-height:9px;
}

/* More compact layout for high question counts */
.page.compact-worksheet .worksheet-header{
  gap:8px;
  padding-bottom:10px;
  margin-bottom:10px;
}

.page.compact-worksheet .title-row h2{
  font-size:24px;
}

.page.compact-worksheet .instructions{
  padding:8px 10px;
  margin-bottom:10px;
}

.page.compact-worksheet .problem-grid{
  gap:8px;
}

.page.compact-worksheet .problem-card{
  padding:9px 10px;
  border-radius:15px;
}

.page.compact-worksheet .problem-text{
  font-size:16px;
  line-height:1.15;
}

.page.compact-worksheet .answer-line{
  min-height:18px;
}

.page.compact-worksheet .work-space{
  gap:4px;
  margin-top:6px;
}

.page.compact-worksheet .work-space span{
  min-height:10px;
}

@media print{
  .page{
    padding:.36in .36in .52in;
  }
}


/* v7: stronger fit for long word-problem worksheets */
.page.word-problem-page{
  padding:.30in .30in .46in;
}

.page.word-problem-page .worksheet-header{
  gap:6px;
  padding-bottom:8px;
  margin-bottom:8px;
}

.page.word-problem-page .title-row h2{
  font-size:22px;
  line-height:1.05;
}

.page.word-problem-page .skill-badge{
  padding:7px 10px;
  font-size:10px;
}

.page.word-problem-page .student-row{
  min-height:26px;
  font-size:11px;
  gap:8px;
}

.page.word-problem-page .student-line{
  min-height:18px;
}

.page.word-problem-page .instructions{
  padding:7px 9px;
  margin-bottom:8px;
  font-size:10.5px;
  line-height:1.25;
}

.page.word-problem-page .problem-grid{
  gap:7px;
  align-content:stretch;
}

.page.word-problem-page .problem-card{
  padding:7px 8px;
  border-radius:13px;
  overflow:hidden;
}

.page.word-problem-page .problem-number{
  font-size:9px;
  margin-bottom:3px;
  line-height:1;
}

.page.word-problem-page .problem-text{
  font-size:13.2px;
  line-height:1.08;
  margin-bottom:4px;
  letter-spacing:-.02em;
  font-weight:850;
}

.page.word-problem-page .answer-line{
  min-height:13px;
  border-bottom-width:1.3px;
}

.page.word-problem-page .work-space{
  gap:2px;
  margin-top:4px;
}

.page.word-problem-page .work-space span{
  min-height:6px;
}

.page.word-problem-page .footer-note{
  bottom:12px;
  font-size:8.5px;
}

/* The most crowded 12-question layouts need almost no extra work-space lines. */
.page.word-problem-page .problem-card .work-space span:nth-child(n+3){
  display:none;
}

.page.word-problem-page .problem-card .work-space{
  display:grid;
}

/* A5 long-word worksheets need a very tight layout. */
.a5-size .page.word-problem-page{
  padding:.18in .18in .34in;
}

.a5-size .page.word-problem-page .problem-text{
  font-size:10.5px;
}

.a5-size .page.word-problem-page .title-row h2{
  font-size:17px;
}

/* Extra print safety: hide overflow inside the problem area instead of letting cards spill outside the page. */
.page .problem-grid{
  overflow:hidden;
}

@media print{
  .page.word-problem-page{
    padding:.30in .30in .46in;
  }
}