:root{
  --purple:#8E63F2; --blue:#1FA8E8; --yellow:#F7C532; --coral:#FF655B; --navy:#1F255F;
  --panel:rgba(255,255,255,.90); --muted:#667091; --shadow:0 16px 38px rgba(31,37,95,.18);
}
*{box-sizing:border-box} html,body{margin:0;min-height:100%}
body{font-family:"Nunito",ui-rounded,sans-serif;color:var(--navy);position:relative;overflow-x:hidden}
a{text-decoration:none;color:inherit}
.site-bg{position:fixed;inset:0;z-index:-4;overflow:hidden}.site-bg img{width:100%;height:100%;object-fit:cover;display:block}
.bg-wash{position:fixed;inset:0;z-index:-3;background:linear-gradient(180deg, rgba(255,255,255,.16), rgba(255,255,255,.20) 36%, rgba(255,255,255,.24) 100%)}
.bg-wash.strong{background:linear-gradient(180deg, rgba(255,255,255,.28), rgba(255,255,255,.42) 36%, rgba(255,255,255,.56) 100%)}

h1,h2,h3,.brand-panel p,.game-card-footer h2,.game-arrow,.action-btn,.continue-btn,.start-btn,.section-number,.series-mark,.book-mark,.unit-mark,.variant-mark,.mini-label,.folder-name,.top-summary strong,.pool-pill strong,.setting-card>span,.summary-card span,.summary-card strong,.selected-sets-summary-copy strong,.selected-sets-toggle{
  font-family:"Fredoka","Nunito",ui-rounded,sans-serif;
}

.home-shell{width:min(1460px, calc(100% - 44px));margin:0 auto;padding:22px 0 26px}
.brand-panel{width:min(500px,90vw);margin:0 auto 16px;padding:0;text-align:center}
.brand-logo{width:min(420px,82vw);max-width:100%;height:auto;max-height:none;display:block;margin:0 auto;object-fit:contain;aspect-ratio:auto;filter:drop-shadow(0 8px 10px rgba(31,37,95,.12))}
.brand-panel p{margin:3px 0 0;font-size:1rem;font-weight:600;color:var(--purple)}

.game-grid{display:flex;flex-wrap:wrap;justify-content:center;gap:16px 18px}
.game-card{--card-accent:var(--purple);flex:0 1 min(calc((100% - 54px)/4),285px);min-width:225px;background:#fff;border-radius:22px;overflow:hidden;box-shadow:0 10px 0 rgba(31,37,95,.10),0 18px 36px rgba(31,37,95,.15);transition:transform .18s ease,box-shadow .18s ease,outline-color .18s ease;outline:0 solid transparent}
.game-card:hover,.game-card:focus-visible{transform:translateY(-7px) scale(1.035);outline:4px solid var(--card-accent);box-shadow:0 14px 0 rgba(31,37,95,.10),0 26px 40px rgba(31,37,95,.20)}
.game-cover{aspect-ratio:4/3;display:block;background:#ececf5}.game-cover-image{display:block;width:100%;height:100%;object-fit:cover;object-position:center}
.sentence-solid{width:100%;height:100%;display:grid;place-items:center;background:#8E63F2;color:#fff;font-size:1.3rem;font-weight:700;position:relative}
.sentence-solid::before{content:"⇄";position:absolute;top:20px;right:22px;font-size:2rem;opacity:.28}
.sentence-solid span{font-family:"Fredoka","Nunito",sans-serif;font-size:1.45rem;letter-spacing:.01em}
.game-card-footer{min-height:58px;padding:11px 14px 12px;border-top:1px solid #ECECF5;display:flex;align-items:center;justify-content:space-between;gap:12px}
.game-card-footer h2{margin:0;font-size:1.04rem;font-weight:650;letter-spacing:-.01em}
.game-arrow{width:36px;height:36px;border-radius:12px;display:grid;place-items:center;background:var(--card-accent);color:#fff;font-weight:650}

.config-shell{width:min(1200px, calc(100% - 40px));margin:0 auto;padding:24px 0 44px}
.config-topbar{position:relative;display:grid;grid-template-columns:1fr auto 1fr;gap:18px;align-items:center;padding:16px 18px;margin-bottom:18px;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border:3px solid var(--navy);border-radius:24px;box-shadow:0 8px 0 rgba(31,37,95,.10),var(--shadow)}
.config-left{display:flex;align-items:center;gap:14px;min-width:0;z-index:2}
.back-home{display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto}
.back-arrow{width:42px;height:42px;border-radius:14px;display:grid;place-items:center;background:var(--yellow);border:3px solid var(--navy);font-weight:700;box-shadow:0 3px 0 var(--navy)}
.config-title-wrap{min-width:0}.config-title-wrap h1{margin:2px 0 0;font-size:1.6rem;font-weight:650;line-height:1.1}
.mini-label{display:block;font-size:.74rem;letter-spacing:.11em;color:var(--muted);font-weight:700}
.top-brand-center{display:flex;justify-content:center;align-items:center;min-width:0}
.top-brand-center img{width:150px;height:auto;display:block;object-fit:contain;filter:drop-shadow(0 5px 8px rgba(31,37,95,.10))}
.top-summary{justify-self:end;min-width:118px;text-align:center;padding:10px 14px;border:3px solid var(--navy);border-radius:16px;background:#fff;z-index:2}.top-summary strong{display:block;font-size:1.45rem}.top-summary span{display:block;font-size:.75rem;color:var(--muted);font-weight:900}

.setup-panel{padding:22px;background:var(--panel);backdrop-filter:blur(10px);border:3px solid var(--navy);border-radius:24px;box-shadow:var(--shadow)} .hidden-step{display:none}
.section-head{display:flex;align-items:flex-start;justify-content:space-between;gap:14px;margin-bottom:16px}.section-head-main{display:flex;gap:12px;align-items:flex-start}.section-number{width:40px;height:40px;border-radius:14px;display:grid;place-items:center;background:var(--purple);border:3px solid var(--navy);color:#fff;font-weight:700;box-shadow:0 3px 0 var(--navy)}.section-number.coral{background:var(--coral)}.section-head h2{margin:0 0 4px;font-size:1.3rem;font-weight:650}.section-head p{margin:0;font-size:.92rem;color:var(--muted);font-weight:700}.pool-pill{min-width:112px;text-align:center;padding:9px 12px;border:3px solid var(--navy);border-radius:15px;background:#FFF1B7}.pool-pill strong{display:block;font-size:1.32rem}.pool-pill small{font-size:.75rem;font-weight:900;color:var(--muted)}
.toolbar{display:grid;grid-template-columns:1fr auto auto;gap:10px;margin-bottom:15px}.search-input{min-width:0;padding:12px 13px;border:3px solid var(--navy);border-radius:14px;background:#fff;outline:none;font-weight:750;color:var(--navy)}.search-input:focus{border-color:var(--purple);box-shadow:0 0 0 4px rgba(142,99,242,.18)}
.action-btn,.continue-btn,.start-btn{border:3px solid var(--navy);border-radius:14px;padding:11px 15px;font-weight:650;box-shadow:0 3px 0 var(--navy);cursor:pointer}.action-btn.blue{background:var(--blue);color:#fff}.action-btn.white{background:#fff;color:var(--navy)}.continue-btn{background:var(--purple);color:#fff;padding:12px 18px}.continue-btn:disabled{background:#C7CCE0;color:#6E7495;cursor:not-allowed;box-shadow:none}.start-btn{background:var(--coral);color:#fff;padding:12px 18px}
.action-btn:active,.continue-btn:active,.start-btn:active,.back-arrow:active,.game-arrow:active{transform:translateY(2px);box-shadow:0 1px 0 var(--navy)}

.book-tree{padding-right:0;transition:max-height .18s ease, padding-right .18s ease;max-height:none;overflow:visible;border-bottom:2px dashed #D9DDF0}
.book-tree:has(details[open]){max-height:min(46vh,460px);overflow:auto;padding-right:8px}
.book-tree::-webkit-scrollbar{width:12px;height:12px}
.book-tree::-webkit-scrollbar-track{background:#EDE8FF;border-radius:999px;border:2px solid #D1C4FF}
.book-tree::-webkit-scrollbar-thumb{background:linear-gradient(180deg, #8E63F2, #6E8BFF);border-radius:999px;border:2px solid #EDE8FF}
.book-tree::-webkit-scrollbar-thumb:hover{background:linear-gradient(180deg, #7F54E4, #5C7AF4)}
.book-tree{scrollbar-color:#8E63F2 #EDE8FF;scrollbar-width:auto}

.series-folder,.book-folder,.variant-folder,.unit-folder{overflow:hidden;background:#fff;border:3px solid var(--navy);border-radius:18px;box-shadow:0 5px 0 rgba(31,37,95,.08)}
.series-folder{margin-bottom:14px}.book-folder,.variant-folder,.unit-folder{margin-top:10px}
.series-summary,.book-summary,.variant-summary,.unit-summary{list-style:none;display:grid;grid-template-columns:auto 1fr auto auto;gap:10px;align-items:center;cursor:pointer;user-select:none}.series-summary::-webkit-details-marker,.book-summary::-webkit-details-marker,.variant-summary::-webkit-details-marker,.unit-summary::-webkit-details-marker{display:none}
.series-summary{padding:14px 15px;background:var(--series-primary);color:#fff}.book-summary{padding:12px 14px;background:var(--book-primary);color:#fff}.variant-summary{padding:10px 13px;background:var(--book-soft2)}.unit-summary{padding:10px 13px;background:var(--book-soft)}
.series-summary .folder-name,.series-summary .folder-meta,.series-summary .chevron,.book-summary .folder-name,.book-summary .folder-meta,.book-summary .chevron{color:#fff}
.series-mark,.book-mark,.variant-mark,.unit-mark{display:grid;place-items:center;border:3px solid var(--navy);box-shadow:0 2px 0 var(--navy);font-weight:650}
.series-mark{width:52px;height:30px;border-radius:10px;background:#fff;color:var(--series-primary);font-size:.74rem}
.book-mark{width:40px;height:30px;border-radius:10px;background:#fff;color:var(--book-primary);font-size:.74rem}
.variant-mark,.unit-mark{width:30px;height:30px;border-radius:10px;background:var(--book-secondary);color:var(--navy);font-size:.88rem}
.folder-name{min-width:0;font-weight:650}.folder-meta{font-size:.74rem;font-weight:900;color:var(--muted)}.chevron{width:28px;height:28px;display:grid;place-items:center;font-size:1.35rem;font-weight:900;transition:transform .18s ease}
.series-folder[open]>.series-summary .chevron,.book-folder[open]>.book-summary .chevron,.variant-folder[open]>.variant-summary .chevron,.unit-folder[open]>.unit-summary .chevron{transform:rotate(90deg)}
.series-wrap{padding:10px;background:var(--series-soft)}.books-wrap{padding:10px;background:var(--book-soft)}.variants-wrap,.units-wrap{padding:8px;background:#fff}.content-wrap{padding:7px;background:#fff}
.content-row{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:10px;padding:10px 11px;border-radius:12px;cursor:pointer}.content-row:hover{background:var(--book-soft)}.content-row:has(input:checked){background:var(--book-soft2);outline:2px solid var(--book-primary)}.content-row input{width:18px;height:18px;accent-color:var(--book-primary)}.content-name{font-weight:800}.content-row small{font-size:.76rem;font-weight:900;color:var(--muted)}
.empty-state{padding:28px;text-align:center;border:3px dashed var(--purple);border-radius:16px;background:#F7F2FF}.empty-state strong,.empty-state span{display:block}.empty-state span{margin-top:5px;color:var(--muted)}
.step-footer{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:16px;padding-top:15px}.selection-hint{font-weight:850;color:var(--muted)}

.settings-head{margin-bottom:14px}
.settings-summary{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-bottom:14px}.summary-card{border:3px solid var(--navy);border-radius:18px;padding:14px 15px;box-shadow:0 3px 0 var(--navy);background:#fff}.summary-card.purple{background:#E7DAFF}.summary-card.yellow{background:#FFF0A8}.summary-card span{display:block;font-size:.72rem;font-weight:650;letter-spacing:.08em}.summary-card strong{display:block;margin-top:4px;font-size:1.08rem;font-weight:650}
.selected-sets-panel{margin-bottom:14px;border:3px solid var(--navy);border-radius:18px;background:#fff;overflow:hidden;box-shadow:0 4px 0 rgba(31,37,95,.10)}
.selected-sets-panel summary{list-style:none;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 16px;cursor:pointer;background:#F5F2FF;user-select:none}.selected-sets-panel summary::-webkit-details-marker{display:none}.selected-sets-summary-copy{min-width:0}.selected-sets-summary-copy strong{display:block;font-size:1.05rem;font-weight:650;color:var(--navy)}.selected-sets-summary-copy small{display:block;margin-top:2px;color:var(--muted);font-size:.88rem;font-weight:800;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%}
.selected-sets-toggle{display:inline-grid;place-items:center;padding:10px 14px;border:3px solid var(--navy);border-radius:12px;background:#fff;color:var(--navy);font-size:.95rem;font-weight:650;box-shadow:0 2px 0 var(--navy)}
.selected-sets-panel[open] .selected-sets-toggle{background:var(--purple);color:#fff}
.selected-sets-body{padding:10px 14px 14px;background:#fff}
.selected-set-list{margin:0;padding:0;list-style:none;display:grid;gap:10px}.selected-set-item{display:grid;gap:3px;padding:11px 12px;border:2px solid #E4E8F7;border-radius:14px;background:#FAFBFF}.selected-set-path{font-weight:900;color:var(--navy);font-size:.94rem}.selected-set-meta{font-size:.8rem;color:var(--muted);font-weight:800}
.settings-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:13px}.setting-card{display:block;border:3px solid var(--navy);border-radius:18px;padding:13px;background:linear-gradient(180deg,#FFFFFF,#F8FAFF);box-shadow:0 4px 0 rgba(29,35,91,.10)}.setting-card>span{display:block;margin-bottom:8px;font-size:.82rem;font-weight:600;color:var(--purple)}.setting-card input,.setting-card select{width:100%;padding:11px;border:3px solid var(--navy);border-radius:12px;background:#fff;font-weight:850;color:var(--navy);outline:none}.setting-card input:focus,.setting-card select:focus{border-color:var(--blue);box-shadow:0 0 0 4px rgba(31,168,232,.16)}
.launch-panel{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-top:17px;padding:18px;border:3px solid var(--navy);border-radius:20px;background:linear-gradient(180deg,#EDF8FF,#DFF0FA)}.launch-panel h3{margin:2px 0 4px;font-family:"Fredoka","Nunito",sans-serif;font-weight:650}.launch-panel p{margin:0;color:var(--muted);font-size:.88rem;font-weight:700}
.summary-dialog{width:min(650px,calc(100% - 40px));border:4px solid var(--navy);border-radius:24px;padding:24px;box-shadow:0 9px 0 var(--navy),0 28px 70px rgba(29,35,91,.25)}.summary-dialog::backdrop{background:rgba(29,35,91,.45)}.dialog-close{position:absolute;right:12px;top:10px;width:35px;height:35px;border:3px solid var(--navy);border-radius:11px;background:var(--yellow);font-size:20px;font-weight:1000}.summary-dialog pre{max-height:330px;overflow:auto;background:var(--navy);color:#fff;border-radius:13px;padding:14px}

@media(max-width:1200px){.game-card{flex-basis:calc((100% - 44px)/3)}}
@media(max-width:980px){.game-card{flex-basis:calc((100% - 22px)/2)}.toolbar{grid-template-columns:1fr 1fr}.search-input{grid-column:1/-1}.config-topbar{grid-template-columns:1fr auto;grid-template-areas:"left summary" "brand brand"}.config-left{grid-area:left}.top-summary{grid-area:summary}.top-brand-center{grid-area:brand;justify-content:flex-start;padding-left:56px}}
@media(max-width:760px){.home-shell{width:min(100% - 24px,760px)}.config-shell{width:min(100% - 22px,760px)}.config-topbar{grid-template-columns:1fr;grid-template-areas:"left" "brand" "summary";gap:12px}.top-brand-center{justify-content:center;padding-left:0}.top-summary{justify-self:start}.config-title-wrap h1{font-size:1.35rem}.section-head{display:block}.pool-pill{margin:12px 0 0 52px;width:max-content}.settings-summary,.settings-grid{grid-template-columns:1fr}.step-footer,.launch-panel{flex-direction:column;align-items:stretch}.continue-btn,.start-btn{width:100%}.selected-sets-panel summary{align-items:flex-start;flex-direction:column}.selected-sets-toggle{width:100%;justify-content:center}}
@media(max-width:520px){.game-card{flex-basis:100%;min-width:0}.toolbar{grid-template-columns:1fr}.book-tree:has(details[open]){max-height:min(52vh,500px)}}

@media (min-width:1100px) and (min-height:720px){
  .home-page{min-height:100vh}
  .home-shell{min-height:100vh;display:flex;flex-direction:column;justify-content:center}
}