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.nav-menu{position:relative}.nav-menu>summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:8px;min-height:44px}.nav-menu>summary::-webkit-details-marker{display:none}.nav-menu>summary span{font-size:11px;color:#7e8ca2}.nav-menu[open]>summary{color:var(--blue)}.nav-dropdown{position:absolute;top:calc(100% + 9px);left:-20px;width:260px;padding:14px;background:white;border:1px solid var(--line);box-shadow:0 14px 35px #17254418;border-radius:11px;z-index:20}.nav-dropdown a{display:block;font-size:13px;font-weight:500;padding:9px 11px;border-radius:5px}.nav-dropdown a:hover{background:#f1f6ff}.grade-menu .nav-dropdown{width:350px;display:grid;grid-template-columns:1fr 1fr;gap:3px}.topic-directory{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:25px}.topic-tile{padding:22px;border:1px solid var(--line);border-radius:12px;background:#fff}.topic-tile:hover{border-color:#a8c3f3;background:#fafcff}.topic-tile h3{font-size:16px;display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:10px}.topic-tile h3 span{color:#7094d0}.topic-tile p{font-size:12px;margin:0;line-height:1.8}.availability-note{border-left:3px solid #9eb9e8;border-radius:7px;background:#f5f8fd;padding:22px;margin-top:24px}.availability-note p{font-size:14px}.breadcrumb{display:flex;flex-wrap:wrap;gap:7px;line-height:1.8}.subject-directory+.subject-directory{border-top:1px solid var(--line)}.subject-card h3{font-size:16px}.grade-grid{grid-template-columns:repeat(7,minmax(0,1fr))}@media(max-width:1100px){.grade-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.topic-directory{grid-template-columns:repeat(2,minmax(0,1fr))}.nav{gap:16px}}@media(max-width:767px){.nav-menu>summary{padding:12px;min-height:44px}.nav-dropdown,.grade-menu .nav-dropdown{position:static;box-shadow:none;border:0;background:#f6f9ff;margin-bottom:8px;width:100%;padding:10px;border-radius:7px}.nav-menu:not([open]) .nav-dropdown{display:none}.grade-menu .nav-dropdown{grid-template-columns:1fr 1fr}.nav-dropdown a{padding:9px 12px;font-size:12px}.topic-directory{grid-template-columns:1fr}.grade-grid{grid-template-columns:repeat(2,minmax(0,1fr))}nav{max-height:calc(100vh - 85px);overflow:auto}.nav-menu .nav-dropdown{left:auto}.subject-card h3{font-size:17px}}@media print{.availability-note,.topic-directory{display:none}}
/* Keep dropdown panels out of the header's flex layout in every browser. */
header{position:relative;z-index:30}.nav{min-height:90px}.nav>.logo,.nav>.button{flex-shrink:0}.nav>nav{align-items:center;flex-shrink:0}.nav>nav>a{white-space:nowrap}.nav-menu{flex:0 0 auto;min-width:0}.nav-menu>summary{display:flex;align-items:center;justify-content:space-between;gap:8px;white-space:nowrap;list-style:none;user-select:none}.nav-menu>summary::marker{content:''}.nav-menu>summary::-webkit-details-marker{display:none}.nav-menu>.nav-dropdown{display:none;position:absolute;left:-18px;right:auto;top:calc(100% + 8px);width:260px;max-height:min(540px,calc(100vh - 120px));overflow-y:auto;overscroll-behavior:contain;padding:12px;background:#fff;border:1px solid #e1e8f2;border-radius:12px;box-shadow:0 15px 35px #17254420;z-index:40}.nav-menu[open]>.nav-dropdown{display:flex;flex-direction:column;gap:2px}.nav-menu.grade-menu[open]>.nav-dropdown{display:grid;grid-template-columns:1fr 1fr;width:350px;column-gap:10px}.nav-menu .nav-dropdown>a{display:block;white-space:normal;line-height:1.5;padding:10px 12px;border-radius:6px;font-size:13px;font-weight:550}.nav-menu .nav-dropdown>a:hover,.nav-menu .nav-dropdown>a:focus-visible{background:#edf4ff;color:var(--blue)}.nav-menu>summary span{transition:transform .15s}.nav-menu[open]>summary span{transform:rotate(180deg)}@media(max-width:767px){.nav{min-height:74px;height:74px}.nav>nav{align-items:stretch;flex-shrink:1}.nav-menu{width:100%}.nav-menu>summary{justify-content:space-between;min-height:46px;width:100%;padding:12px}.nav-menu>.nav-dropdown,.nav-menu.grade-menu[open]>.nav-dropdown{position:static;width:100%;max-height:none;border:0;box-shadow:none;background:#f4f8ff;margin:0 0 10px;padding:8px;overflow:visible}.nav-menu .nav-dropdown>a{font-size:13px;padding:11px 12px}.nav-menu.grade-menu[open]>.nav-dropdown{column-gap:5px}.nav>nav.open{display:flex}}
@media(min-width:768px){.nav-menu>.nav-dropdown{left:auto;right:0}}
.home-learning{padding-top:40px;padding-bottom:25px}.home-learning a{color:#235bd2;text-decoration:underline;text-decoration-color:#adc4ef;text-underline-offset:3px}.home-learning a:hover{text-decoration-color:currentColor}.home-learning h2{max-width:760px}.home-learning h3{font-size:21px;margin-top:28px}@media(max-width:767px){.home-learning{padding-top:24px;padding-bottom:12px}.home-learning h3{font-size:19px}}
/* Compact pastel topic navigation shared by subject and grade directories. */
.topic-directory{grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-top:22px}.topic-tile{padding:15px 17px;border-radius:10px;border:1px solid transparent;box-shadow:none;transition:border-color .15s,transform .15s}.topic-tile:nth-child(6n+1){background:#eaf5ef}.topic-tile:nth-child(6n+2){background:#edf3ff}.topic-tile:nth-child(6n+3){background:#f3edfb}.topic-tile:nth-child(6n+4){background:#fff2e7}.topic-tile:nth-child(6n+5){background:#fbf4df}.topic-tile:nth-child(6n){background:#fbeef3}.topic-tile h3{font-size:14px;line-height:1.4;letter-spacing:-.2px;margin-bottom:6px;gap:9px}.topic-tile h3 span{flex-shrink:0}.topic-tile p{font-size:11px;line-height:1.65;color:#53657e}.topic-tile:hover{border-color:#8eacd9;transform:translateY(-2px)}@media(max-width:1100px){.topic-directory{grid-template-columns:repeat(3,minmax(0,1fr))}}@media(max-width:767px){.topic-directory{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.topic-tile{padding:13px}.topic-tile h3{font-size:13px}.topic-tile p{font-size:11px}}@media(prefers-reduced-motion:reduce){.topic-tile:hover{transform:none}}
.topic-skill-guide{scroll-margin-top:28px;border-left:3px solid #b8cdee;background:#f7faff;border-radius:7px;padding:1px 22px 10px;margin:24px 0}.topic-skill-guide h3{margin-top:20px}
.reading-passage{margin-top:26px;padding:24px;background:#f4f8ff;border:1px solid #dce7f7;border-radius:10px}.reading-passage h2{font-size:23px}.reading-passage p{font-size:16px;line-height:1.95;color:#394b67;margin-bottom:0}@media(max-width:767px){.reading-passage{padding:18px}.reading-passage h2{font-size:21px}.reading-passage p{font-size:15px}}@media print{.reading-passage{background:#fff;border:1px solid #999;break-inside:avoid;padding:14px}.reading-passage .eyebrow{display:none}.reading-passage h2{font-size:17px}.reading-passage p{font-size:12px;line-height:1.6}}
/* More-section topic links retain the shared chip sizing and layout. */
.more-section .chips>a:nth-child(6n+1){background:#eaf5ef;border-color:#d9eae0}.more-section .chips>a:nth-child(6n+2){background:#edf3ff;border-color:#dce6f7}.more-section .chips>a:nth-child(6n+3){background:#f3edfb;border-color:#e5dcf2}.more-section .chips>a:nth-child(6n+4){background:#fff2e7;border-color:#f3e2d2}.more-section .chips>a:nth-child(6n+5){background:#fbf4df;border-color:#ece3c8}.more-section .chips>a:nth-child(6n){background:#fbeef3;border-color:#efdce5}.more-section .chips>a:hover{border-color:var(--blue)}
.availability-note .text-link{white-space:normal;overflow-wrap:anywhere}

/* Shared worksheet filters: clear controls and a compact, sticky desktop panel. */
.library > .filters{background:#f0f6ff;border:1px solid #cfddf5;border-top:4px solid var(--blue);border-radius:14px;padding:20px 18px;box-shadow:0 6px 20px #17254408;align-self:start}
.filters summary{display:flex;align-items:center;justify-content:space-between;gap:10px;color:var(--navy);font-size:15px;line-height:1.4;margin-bottom:18px;padding-bottom:15px;border-bottom:1px solid #d8e4f6}
.filters summary::after{content:'−';display:grid;place-items:center;flex:0 0 25px;height:25px;border-radius:7px;background:#dfeaff;color:var(--blue);font-size:19px;font-weight:500}
.filters details:not([open]) summary{margin-bottom:0;padding-bottom:0;border-bottom:0}
.filters details:not([open]) summary::after{content:'+'}
.filters label{color:#34496b;font-size:12px;font-weight:650;margin:14px 0}
.filters select{appearance:none;min-height:43px;padding:10px 30px 10px 11px;border:1px solid #c4d4eb;border-radius:8px;background:#fff url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%23557096' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E") no-repeat right 10px center;color:#253c61;font-size:12px;font-weight:500;line-height:1.4;margin-top:6px;cursor:pointer;transition:border-color .15s,box-shadow .15s}
.filters select:hover{border-color:#739ce0}
.filters select:focus-visible{outline:2px solid var(--blue);outline-offset:2px;border-color:var(--blue)}
.filters .reset-filters{display:block;width:100%;padding:10px 12px;margin-top:18px;border:1px solid #c7d9f7;border-radius:8px;background:#e1ecff;color:#2455ae;font-size:12px;font-weight:650;text-align:center}
.filters .reset-filters:hover{background:#d5e5ff;border-color:#9dbcec}
@media(min-width:768px){.library > .filters{position:sticky;top:22px;max-height:calc(100dvh - 44px);overflow-y:auto;scrollbar-width:thin;scrollbar-color:#afc6eb transparent}}
@media(max-width:767px){.library > .filters{position:static;padding:16px;margin-bottom:24px}.filters label{vertical-align:top}.filters summary{font-size:15px}.filters .reset-filters{margin-top:10px}}
@media(max-width:420px){.filters label{display:block;width:100%;margin-right:0}}

/* Homepage popular topics: colors only; shared chip dimensions stay unchanged. */
.topic-section .chips>a:nth-child(6n+1){background:#eaf5ef;border-color:#d9eae0}
.topic-section .chips>a:nth-child(6n+2){background:#edf3ff;border-color:#dce6f7}
.topic-section .chips>a:nth-child(6n+3){background:#f3edfb;border-color:#e5dcf2}
.topic-section .chips>a:nth-child(6n+4){background:#fff2e7;border-color:#f3e2d2}
.topic-section .chips>a:nth-child(6n+5){background:#fbf4df;border-color:#ece3c8}
.topic-section .chips>a:nth-child(6n){background:#fbeef3;border-color:#efdce5}

/* Touch layouts: existing grade and topic cards in a single horizontal row. */
@media screen and (max-width:1024px){
  .grade-grid,.topic-directory{
    grid-template-columns:none;
    grid-auto-flow:column;
    grid-auto-columns:clamp(155px,42vw,225px);
    overflow-x:auto;
    overscroll-behavior-x:contain;
    scroll-snap-type:x proximity;
    scroll-padding-inline:2px;
    padding-bottom:12px;
    scrollbar-width:thin;
    scrollbar-color:#bdcde5 transparent;
  }
  .topic-directory{grid-auto-columns:clamp(175px,44vw,260px)}
  .grade-grid>.grade-card,.topic-directory>.topic-tile{scroll-snap-align:start;min-width:0}
}

/* Homepage intro call to action. */
.hero-copy>.explore-worksheets{background:#c74735;border-color:#c74735;margin-bottom:22px}
.hero-copy>.explore-worksheets:hover{background:#ad3929;border-color:#ad3929}

/* Supplied WorksheetKoala wordmark, preserving header and footer layout. */
.logo .site-brand-logo{display:block;width:270px;height:44px;object-fit:cover;object-position:center;max-width:100%}
.footer .logo .site-brand-logo{width:240px;height:42px}
@media(max-width:767px){.logo .site-brand-logo{width:235px;height:42px}}

/* Results: encouraging koala and pastel next-step links. */
#results .results-koala{display:block;width:104px;height:104px;object-fit:contain;margin:0 auto 10px}
#results>.controls>a.button{color:var(--navy)}
#results>.controls>a.button:nth-child(1){background:#e4f3ed;border-color:#cce4d8}
#results>.controls>a.button:nth-child(2){background:#eeeafa;border-color:#dfd7ef}
#results>.controls>a.button:nth-child(3){background:#fff0e4;border-color:#efdccc}
#results>.controls>a.button:nth-child(1):hover{background:#d4eade}
#results>.controls>a.button:nth-child(2):hover{background:#e1daf3}
#results>.controls>a.button:nth-child(3):hover{background:#f7e2d1}
@media(max-width:767px){
#results>.chips>a:nth-child(6n+1){background:#eaf5ef;border-color:#d9eae0}
#results>.chips>a:nth-child(6n+2){background:#edf3ff;border-color:#dce6f7}
#results>.chips>a:nth-child(6n+3){background:#f3edfb;border-color:#e5dcf2}
#results>.chips>a:nth-child(6n+4){background:#fff2e7;border-color:#f3e2d2}
#results>.chips>a:nth-child(6n+5){background:#fbf4df;border-color:#ece3c8}
#results>.chips>a:nth-child(6n){background:#fbeef3;border-color:#efdce5}
}

/* Skill choices: the existing chip layout with shared pastel colors at every size. */
.skill-chips>a:nth-child(6n+1){background:#eaf5ef;border-color:#d9eae0}
.skill-chips>a:nth-child(6n+2){background:#edf3ff;border-color:#dce6f7}
.skill-chips>a:nth-child(6n+3){background:#f3edfb;border-color:#e5dcf2}
.skill-chips>a:nth-child(6n+4){background:#fff2e7;border-color:#f3e2d2}
.skill-chips>a:nth-child(6n+5){background:#fbf4df;border-color:#ece3c8}
.skill-chips>a:nth-child(6n){background:#fbeef3;border-color:#efdce5}

/* Sorting shares the existing sidebar filter styling. */
.filters .sort{min-width:0}

/* Worksheet-only print footer, centered in the reserved bottom margin. */
@page worksheet{margin:15mm 15mm 24mm}
@media print{
  body:has(#practice){page:worksheet}
  body:has(#practice)::after{
    content:'WorksheetKoala · worksheetkoala.com';
    position:fixed;
    left:0;
    right:0;
    bottom:-15mm;
    text-align:center;
    font:600 10pt/1.4 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
    letter-spacing:.2pt;
    color:#172544;
  }
}

/* Grade choices retain their size and use the shared pastel palette. */
.grade-chips>a:nth-child(6n+1){background:#eaf5ef;border-color:#d9eae0}
.grade-chips>a:nth-child(6n+2){background:#edf3ff;border-color:#dce6f7}
.grade-chips>a:nth-child(6n+3){background:#f3edfb;border-color:#e5dcf2}
.grade-chips>a:nth-child(6n+4){background:#fff2e7;border-color:#f3e2d2}
.grade-chips>a:nth-child(6n+5){background:#fbf4df;border-color:#ece3c8}
.grade-chips>a:nth-child(6n){background:#fbeef3;border-color:#efdce5}