/* Study64 app system. Visual authority: landing.css, Paper → Screen.
   Loaded only by the app, auth and utility pages; never by the homepage.
   Existing layout/state selectors remain in style.css; these are their
   shared presentation tokens and component variants. */
@font-face{font-family:"Dela Gothic One";src:url("../assets/fonts/dela-gothic-one.woff2") format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:"Schibsted Grotesk";src:url("../assets/fonts/schibsted-grotesk.woff2") format("woff2");font-weight:400 800;font-display:swap}
@font-face{font-family:"Gochi Hand";src:url("../assets/fonts/gochi-hand.woff2") format("woff2");font-weight:400;font-display:swap}

:root{
  --paper:#f3f0e8;--paper-card:#fffdf7;--ink:#0f0e15;--ink-2:#17151f;--ink-3:#211e2b;
  --yellow:#fbcb0a;--yellow-edge:#a88600;--violet:#6e48f6;--violet-soft:#a48cff;
  --screen-muted:#aaa5b9;--screen-line:rgb(255 255 255 / .16);
  --ruled:rgb(52 96 178 / .13);--margin-red:rgb(214 72 72 / .38);
  --font-display:"Dela Gothic One","Arial Black",sans-serif;
  --font-body:"Schibsted Grotesk",system-ui,sans-serif;
  --font-hud:ui-monospace,"SF Mono","Cascadia Mono","Segoe UI Mono",Consolas,monospace;
  --font-hand:"Gochi Hand","Comic Sans MS",cursive;
  --space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:24px;--space-6:32px;--space-7:48px;--space-8:64px;
  --bg:var(--paper);--card:var(--paper-card);--text:var(--ink);--muted:#585462;
  --edge:rgb(15 14 21 / .16);--edge2:rgb(15 14 21 / .3);--border:var(--edge);
  --accent:#6040d5;--accent-bright:var(--violet);--accent-press:#5334c4;
  --accent-soft:#eae4fc;--accent-line:#c5b5f3;--ring:var(--violet);
  --good:#087969;--good-soft:#def3e9;--good-line:#98cbbb;
  --bad:#b13228;--bad-soft:#fbe6df;--bad-line:#e6afa5;
  --teal:#087969;--teal-soft:#def3ed;--teal-line:#98cbbb;
  --sun:#775c00;--sun-soft:#fff1b6;--sun-line:#d5bb59;
  --coral:#b13228;--coral-soft:#fbe6df;--coral-line:#e6afa5;
  --radius:12px;--radius-sm:10px;--radius-pill:999px;
  --shadow-sm:0 3px 8px -5px rgb(15 14 21 / .25);
  --shadow:0 12px 24px -18px rgb(15 14 21 / .4);
  --shadow-lg:0 28px 64px -28px rgb(15 14 21 / .45);
  --ease:cubic-bezier(.23,1,.32,1);--ease-io:cubic-bezier(.77,0,.175,1);
  --page-width:1120px;--page-gutter:clamp(20px,4.5vw,64px);
  color-scheme:light;
}
:root[data-theme="dark"]{
  --bg:var(--ink);--card:var(--ink-2);--text:var(--paper);--muted:#bbb5c8;
  --edge:rgb(255 255 255 / .16);--edge2:rgb(255 255 255 / .3);
  --accent:var(--violet-soft);--accent-bright:var(--violet-soft);--accent-press:#c4b5ff;
  --accent-soft:#29213e;--accent-line:#594884;--ring:var(--yellow);
  --good:#67d8b8;--good-soft:#17342e;--good-line:#365e53;
  --bad:#ff9988;--bad-soft:#3b2327;--bad-line:#764344;
  --teal:#67d8b8;--teal-soft:#17342e;--teal-line:#365e53;
  --sun:var(--yellow);--sun-soft:#352f18;--sun-line:#716127;
  --coral:#ff9988;--coral-soft:#3b2327;--coral-line:#764344;
  --ruled:rgb(164 140 255 / .12);--margin-red:rgb(246 90 63 / .28);
  color-scheme:dark;
}
body{font-family:var(--font-body);font-size:16px;line-height:1.6;background:var(--bg);color:var(--text);text-rendering:optimizeLegibility}
button,input,textarea,select{font-family:var(--font-body)}
h1,h2,.logo{font-family:var(--font-display);font-weight:400;letter-spacing:-.02em;text-wrap:balance}
h3,h4{font-family:var(--font-body);font-weight:750;letter-spacing:-.02em}
::selection{background:var(--yellow);color:var(--ink)}
*{scrollbar-color:var(--edge2) var(--bg);scrollbar-width:thin}
input,textarea{caret-color:var(--accent)}
a{text-underline-offset:.25em;text-decoration-thickness:1px}
:is(button,a,input,textarea,select,summary,[tabindex]):focus-visible{
  outline:3px solid var(--ring)!important;outline-offset:4px;box-shadow:none;
}
[hidden]{display:none!important}
.appSkip{position:fixed;top:8px;left:12px;z-index:150;background:var(--yellow);color:var(--ink);padding:10px 16px;border-radius:10px;transform:translateY(-160%);font-weight:700}
.appSkip:focus{transform:none}

/* Physical keys, shared by every action outside the game canvas. */
.btn,.googleBtn{min-height:48px;border-radius:10px;font-size:15px;font-weight:700;line-height:1.3;padding:12px 20px;transition:background-color .14s ease,transform .14s var(--ease),box-shadow .14s var(--ease)}
.btnPrimary,#upgradeBtn,.btArena .btnPrimary,.sbOverlay .btnPrimary{
  background:var(--yellow);color:var(--ink);border:1px solid transparent;box-shadow:0 4px 0 var(--yellow-edge);
}
.btnPrimary:hover:not(:disabled),#upgradeBtn:hover:not(:disabled),.btArena .btnPrimary:hover:not(:disabled){background:#ffd62e;color:var(--ink)}
.btnPrimary:active:not(:disabled),#upgradeBtn:active:not(:disabled){transform:translateY(3px);box-shadow:0 1px 0 var(--yellow-edge)}
.btnGhost{background:transparent;border:1px solid var(--edge2);color:var(--text);box-shadow:0 3px 0 var(--edge)}
.btnGhost:hover{background:var(--card);border-color:var(--text);color:var(--text)}
.btnGhost:active:not(:disabled){transform:translateY(2px);box-shadow:0 1px 0 var(--edge)}
.btnAccentSoft{background:var(--accent-soft);color:var(--accent);border:1px solid var(--accent-line);box-shadow:none}
.btnGood{background:var(--good-soft);color:var(--good);border:1px solid var(--good-line);box-shadow:0 3px 0 var(--good-line)}
.btnBad{background:var(--bad-soft);color:var(--bad);border:1px solid var(--bad-line);box-shadow:0 3px 0 var(--bad-line)}
.btnSmall{min-height:44px;padding:9px 14px;font-size:13px}
.btn:disabled,.googleBtn:disabled{opacity:.55;box-shadow:none;transform:none;cursor:not-allowed}
.linkBtn,.backLink,.legalBack{min-height:44px;display:inline-flex;align-items:center;font-size:14px}
.backLink{margin-bottom:24px;gap:8px}
.icon{stroke-width:1.8}

/* App shell: a paper desk, with the same 68px bar as the homepage. */
header.appBar,:root[data-theme="dark"] header.appBar{
  min-height:68px;padding:10px var(--page-gutter);background:var(--bg);border:0;border-bottom:1px solid var(--edge);box-shadow:none;backdrop-filter:none;gap:16px;
}
header.appBar .logo{border:0;padding:0;background:none;flex-shrink:0;line-height:1}
header.appBar .logo img{height:34px;width:auto}
#settingsBtn,.sfxToggle,#signOutBtn{min-width:44px;min-height:44px;border-radius:10px}
#usagePill{font-family:var(--font-hud);font-size:11px;letter-spacing:.02em;border-radius:6px;padding:8px 12px;background:var(--card)}
.shell{max-width:var(--page-width);padding:32px var(--page-gutter) 80px}
.shell:has(#viewGameBrainTrivia.active){max-width:1200px}
.shell:has(:is(#viewNew,#viewDraft,#viewSettings,#viewCreate).active){max-width:960px}
#mainNav,:root[data-theme="dark"] #mainNav{width:100%;background:transparent;border:0;border-bottom:1px solid var(--edge);border-radius:0;padding:0 0 12px;gap:8px;margin-bottom:36px;box-shadow:none}
#navSlider{display:none}
.navTab{min-height:44px;border-radius:8px;padding:10px 18px;font-weight:700;font-size:15px;transition:background .14s ease,color .14s ease}
.navTab.active,.navTab.active:hover,:root[data-theme="dark"] .navTab.active,:root[data-theme="dark"] .navTab.active:hover{background:var(--text);color:var(--bg);box-shadow:none}
h2.viewTitle{font-family:var(--font-display);font-weight:400;font-size:clamp(28px,3.5vw,44px);line-height:1.16;letter-spacing:-.025em;margin-bottom:12px;overflow-wrap:anywhere}
.viewSub{font-size:16px;line-height:1.6;margin-bottom:32px;max-width:65ch}
.view.active{animation:none}
.studyStage{max-width:680px}

/* Authentication: the homepage's notes on a desk, beside a focused form. */
.authPage{background:var(--paper);color:var(--ink)}
.authBack{position:relative;display:inline-flex;align-items:center;min-height:44px;margin:20px 0 0 var(--page-gutter);top:auto;left:auto;color:var(--muted);font-weight:700}
.authWrap{display:grid;grid-template-columns:1.05fr 1fr;align-items:start;gap:clamp(36px,7vw,100px);max-width:1180px;margin:0 auto;min-height:calc(100vh - 88px);padding:48px var(--page-gutter) 64px}
.authStory{padding-top:36px;min-width:0}
.authStory h1{font-size:clamp(38px,4vw,56px);line-height:1.06;max-width:none;margin-bottom:24px}
.authStory h1 span{color:var(--violet);display:block}
.authStory>p{font-size:17px;color:var(--muted);max-width:36ch}
.authNote{position:relative;background-color:var(--paper-card);background-image:repeating-linear-gradient(transparent 0 35px,var(--ruled) 35px 36px);border:1px solid var(--edge);border-radius:10px;box-shadow:var(--shadow);padding:28px 30px 30px;margin:36px 12px 32px 0;transform:rotate(-3deg);max-width:360px}
.authNote::before{content:"";position:absolute;top:64px;left:0;right:0;border-top:1px solid var(--margin-red)}
.authNote b{font:400 26px/36px var(--font-hand);color:var(--violet)}
.authNote p{font:400 23px/36px var(--font-hand);color:var(--ink);padding-top:8px}
.authCard{width:100%;max-width:480px;padding:32px;background:var(--paper-card);border:1px solid var(--edge);border-radius:12px;box-shadow:var(--shadow);margin:0}
.authHeader{align-items:flex-start;margin-bottom:24px;gap:16px}
.authHeader .logo{justify-content:flex-start}
.authHeaderSub{font-size:20px;font-weight:750;text-align:left;color:var(--text);line-height:1.35}
.authTabs{gap:0;border-bottom:1px solid var(--edge);margin-bottom:24px}
.authTab{border:0;border-bottom:3px solid transparent;border-radius:0;background:transparent;min-height:48px;font-size:15px}
.authTab.active,:root[data-theme="dark"] .authTab.active{background:transparent;border-color:var(--text);color:var(--text)}
.googleBtn{background:var(--card);color:var(--text);border:1px solid var(--edge2);box-shadow:0 3px 0 var(--edge)}
.authMsg.err,.authMsg.ok{padding:12px;text-align:left;border:1px solid var(--bad-line);background:var(--bad-soft);border-radius:8px;line-height:1.5}
.authMsg.ok{border-color:var(--good-line);background:var(--good-soft)}
.authMsg:empty{margin:0;min-height:0}
.authStory .featList{border:0;margin-top:28px;padding-top:0}
.authStory .featList li{font-size:14px;padding:8px 0;color:var(--muted)}
.authStory .featList .icon{color:var(--ink)}
.authCard .fine,.accountRule{font-size:12px;line-height:1.65;text-align:left}
.emailNote{border-radius:8px;background:var(--sun-soft);border-color:var(--sun-line);line-height:1.6}

/* Inputs and editor surfaces. No changes to validation or data bindings. */
label{font-size:14px;font-weight:700;color:var(--text);margin:20px 0 8px}
input[type=email],input[type=password],input[type=text],input[type=number],textarea,select{
  background:var(--card);color:var(--text);border:1px solid var(--edge2);border-radius:8px;padding:13px 14px;font:400 16px/1.5 var(--font-body);min-height:48px;
}
input:focus,textarea:focus,select:focus{border-color:var(--accent);box-shadow:none}
input::placeholder,textarea::placeholder{color:var(--muted);opacity:1}
input[type=checkbox],input[type=radio]{accent-color:var(--accent)}
.panel,:root[data-theme="dark"] .panel{background:var(--card);border:1px solid var(--edge);border-radius:12px;padding:28px;box-shadow:none}
.srcTabs{gap:8px;flex-wrap:wrap;margin-bottom:24px}
.srcTab{min-height:44px;border-radius:8px;font-weight:700;padding:10px 14px}
.srcTab.active{background:var(--text);border-color:var(--text);color:var(--bg)}
#pasteBox{min-height:240px;line-height:1.8;background-color:var(--card);background-image:repeating-linear-gradient(transparent 0 28px,var(--ruled) 28px 29px)}
.dropZone{border:1px dashed var(--edge2);border-radius:10px;padding:40px 20px;background:var(--bg);font-size:15px}
.draftSection{margin-top:36px}
.draftSection h3{font-size:19px;margin-bottom:16px}
.draftItem{padding:24px;border-radius:10px;margin-bottom:16px;box-shadow:none}
.draftItem .rowLabel{font-family:var(--font-hud);font-size:11px;letter-spacing:.08em}
.draftItem textarea{font-size:16px;line-height:1.6;min-height:72px}
.saveBar,:root[data-theme="dark"] .saveBar{background:var(--bg);border-top:1px solid var(--edge);padding:16px 0;gap:12px;backdrop-filter:none}
.createChoices{max-width:none;gap:24px;margin-top:32px}
.createChoice{padding:32px;min-height:230px;border:1px solid var(--edge2);border-radius:12px;gap:16px;box-shadow:none}
.createChoice strong{font-family:var(--font-display);font-weight:400;font-size:24px;line-height:1.25}
.createChoice span{opacity:1;color:var(--muted)}
.createChoice em{padding-top:20px;border-top:1px solid var(--edge);width:100%;font-family:var(--font-hud);font-size:12px}
.createFree{color:var(--good)}

/* Library: study sets are index cards; the goal is a compact score strip. */
.dashTop{align-items:center;gap:20px;margin-bottom:28px}
.dashTop .viewTitle{margin-bottom:8px}
.dashIntro{color:var(--muted);font-size:16px}
.dashTopRight{gap:12px}
.streakPill,:root[data-theme="dark"] .streakPill{border-radius:6px;background:var(--sun-soft);color:var(--sun);border:1px solid var(--sun-line);font-family:var(--font-hud);font-size:12px}
.streakPill .icon{color:inherit}
.dailyGoal,:root[data-theme="dark"] .dailyGoal{background:var(--ink);color:var(--paper);border:0;border-radius:12px;padding:24px;margin:0 0 32px;box-shadow:none}
.dailyGoalHead b{font-size:17px}
.dailyGoalHead span{color:var(--screen-muted);font-family:var(--font-hud);font-size:12px}
#dailyGoalStatus{color:var(--yellow)}
.dailyGoalBar{background:var(--ink-3);height:8px;margin-top:16px}
.dailyGoalBar i{background:#19c3b2}
.deckGrid{gap:24px;margin-top:28px;grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
.deckCard,:root[data-theme="dark"] .deckCard{border:1px solid var(--edge);border-radius:10px;padding:24px;min-height:190px;background-color:var(--card);background-image:repeating-linear-gradient(transparent 0 31px,var(--ruled) 31px 32px);box-shadow:var(--shadow-sm)}
.deckCard .deckIcon{background:var(--card);border:1px solid var(--edge);border-radius:8px;color:var(--accent);margin-bottom:20px}
.deckCard h3{font-family:var(--font-body);font-size:20px;font-weight:750;line-height:1.3;overflow-wrap:anywhere}
.deckCard .meta{font-family:var(--font-hud);font-size:11px;gap:12px;padding-top:12px;border-top:1px solid var(--margin-red)}
.newDeckCard{min-height:190px;border:1px dashed var(--edge2);border-radius:10px;background:transparent;box-shadow:none}
.emptyNote{padding:28px;border-radius:10px;background:var(--card);font-size:15px;line-height:1.7}
.folderHead{font-family:var(--font-hud);font-size:12px;margin:16px 0 0;padding-bottom:12px;border-bottom:1px solid var(--edge);letter-spacing:.04em}
#dueBanner{border-radius:10px;padding:20px;background:var(--card);border-color:var(--edge2);margin:0 0 24px}

/* Play: the dark screen world from the homepage, with real game artwork. */
#viewGames{
  --text:var(--paper);--muted:#bbb5c8;--card:var(--ink-2);--edge:var(--screen-line);--edge2:rgb(255 255 255 / .3);--accent:var(--violet-soft);--accent-soft:#29213e;--accent-line:#594884;--ring:var(--yellow);
  background:var(--ink);color:var(--paper);border-radius:16px;padding:36px;
}
#viewGames .viewTitle{font-size:clamp(36px,5vw,60px)}
#viewGames .viewSub{color:var(--screen-muted);margin-bottom:28px}
.playInvite{background:transparent;border:0;border-top:1px solid var(--edge);border-bottom:1px solid var(--edge);border-radius:0;padding:18px 0;margin-bottom:24px}
.playDemoCopy strong{font-size:16px;color:var(--text)}
.playDemoCopy span{font-size:14px;line-height:1.5}
.playDemoCta{background:var(--ink-3);border:1px solid var(--screen-line);padding:20px;border-radius:10px;margin-bottom:24px}
.customizeSnailLink{margin:0 0 24px}
.gameModeGrid{grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.gameCard.modeCard{border:1px solid var(--screen-line);border-radius:10px;background:var(--ink-2);color:var(--paper);box-shadow:none}
.gameCard.modeCard::before{display:none}
.gameCard .gameBody{padding:20px}
.gameCard .gameHead{align-items:flex-start;flex-wrap:wrap;gap:8px}
.gameCard .gameHead h3{font-family:var(--font-body);font-size:20px;font-weight:750;line-height:1.25;color:var(--paper)}
.gameCard p{color:var(--screen-muted);font-size:14px;line-height:1.6}
#viewGames .gameCard .modeCta{font-family:var(--font-body);font-size:14px;color:var(--yellow);border-top:1px solid var(--screen-line);padding-top:14px;margin-top:18px}
.modeBadge,.modeBadgeVs{font-family:var(--font-hud);font-size:10px;letter-spacing:.08em;border-radius:4px;padding:5px 7px;background:transparent;color:inherit;border:1px solid var(--edge2)}
.gameCard .modeBadge{color:var(--screen-muted);border-color:var(--screen-line)}
.deckSectionLabel{font-family:var(--font-display);font-size:24px;letter-spacing:-.02em;text-transform:none;font-weight:400;margin:32px 0 16px}
.deckGame{background:var(--ink);border:1px solid var(--edge);border-radius:10px;color:var(--paper);box-shadow:none}
.deckGameTitle{font-family:var(--font-body);font-size:17px;font-weight:750}
.deckGame .modeBadge{color:var(--screen-muted);border-color:var(--screen-line)}
.deckStudy{background:var(--card);padding:24px;border:1px solid var(--edge);border-radius:10px;box-shadow:none}
.deckStudy h3{font-size:19px;font-weight:750}
.deckStudy p{font-size:14px;line-height:1.6}
.deckActionsBar{gap:12px;border-top:1px solid var(--edge);padding-top:24px;margin-top:32px}
.deckMore summary{min-height:44px;display:flex;align-items:center;border:1px solid var(--edge2);color:var(--text)}
.deckMore[open]{z-index:5}
.deckMore[open] .deckDelete{position:absolute;right:0;top:100%;width:max-content;max-width:80vw;background:var(--card);padding:16px;border:1px solid var(--edge);border-radius:8px;box-shadow:var(--shadow-lg)}

/* Study cards and answers stay highly legible. Semantics retain their colors. */
.progressText,.flashMastery,#quizTop,.timerLabel{font-family:var(--font-hud);font-size:12px;font-variant-numeric:tabular-nums}
.progressBar{height:8px;background:var(--edge)}
.progressBar i{background:var(--accent);border-radius:inherit}
#flashArea .flip{height:360px}
#flashArea .flip-face{border:1px solid var(--edge2);border-radius:12px;padding:64px 32px 32px;box-shadow:var(--shadow);font-size:23px;line-height:1.55}
#flashArea .flip-front{background-color:var(--card);background-image:repeating-linear-gradient(transparent 0 35px,var(--ruled) 35px 36px);border-top:1px solid var(--edge2)}
#flashArea .flip-back{background:var(--good-soft);border:1px solid var(--good-line);color:var(--text)}
#flashArea .flip .sideTag{font-family:var(--font-hud);font-size:11px;border-radius:4px;top:20px;left:24px;letter-spacing:.1em;padding:4px 8px}
#flashArea .markRow .btn{border-radius:10px;font-size:15px;box-shadow:0 3px 0 var(--edge)}
.qCard{padding:32px;border-radius:12px;background:var(--card);border:1px solid var(--edge)}
.qText{font-size:21px;font-weight:700;line-height:1.5;margin-bottom:24px;overflow-wrap:anywhere}
.ansBtn{font-size:16px;line-height:1.5;color:var(--text);min-height:52px;border:1px solid var(--edge2);border-radius:8px;padding:14px 16px;background:transparent}
.ansBtn.correct{background:var(--good-soft);border-color:var(--good)}
.ansBtn.wrong{background:var(--bad-soft);border-color:var(--bad)}
.revealBox,.gradeResult,.missedReviewCta{border-radius:8px;padding:16px;font-size:15px;line-height:1.6}
.resultBox{padding:36px;border-radius:12px}
.resultBox h3{font-family:var(--font-display);font-size:26px;font-weight:400;line-height:1.3}
.resultRing .ringVal{font-family:var(--font-hud)}
.tutorToggle{min-height:44px;border-radius:8px;font-size:14px}
.tutorPanel{padding:24px;border-radius:12px;box-shadow:none}
.tutorMsgs{gap:12px;max-height:360px;margin-bottom:20px}
.tutorMsg{font-size:15px;line-height:1.65;border-radius:8px;padding:14px 16px;max-width:92%}
.tutorMsg.user{background:var(--accent-soft)}
.tutorMsg.ai{background:var(--bg);border:1px solid var(--edge)}
.tutorRow input{font-size:16px;min-width:0}
.aiDisclaimer{font-size:12px;line-height:1.5}

/* Progress and streaks follow the homepage's high-score panel. */
.statGrid{background:var(--ink);border-radius:12px;gap:0;overflow:hidden;padding:8px;margin:28px 0 32px;grid-template-columns:repeat(5,minmax(0,1fr))}
.statTile{background:transparent;border:0;border-right:1px solid var(--screen-line);border-radius:0;box-shadow:none;padding:24px 12px;align-items:flex-start;gap:12px}
.statTile:last-child{border:0}
.statTile .statNum,.statTile:nth-child(n) .statNum{font-family:var(--font-hud);font-size:32px;font-weight:700;color:var(--paper);font-variant-numeric:tabular-nums}
.statTile:nth-child(4) .statNum{color:var(--yellow)}
.statTile .statLabel{font-family:var(--font-hud);font-size:10px;line-height:1.6;letter-spacing:.06em;color:var(--screen-muted)}
.weekPanel{border-radius:12px;padding:28px;box-shadow:none}
.weekPanel h3{font-size:16px;color:var(--text);letter-spacing:0;text-transform:none;margin-bottom:24px}
.weekDay i{width:44px;height:44px;border-radius:8px}
.weekDay span,.calDow{font-family:var(--font-hud);font-size:11px}
.histNav button{width:44px;height:44px}
.calCell{max-height:72px;font-family:var(--font-hud);font-size:13px}
.historyLocked{padding:24px}

/* Settings read as grouped rows, not a stack of unrelated cards. */
.settingsGroup{margin:32px 0;background:transparent}
.settingsGroup h3{font-family:var(--font-body);font-size:20px;font-weight:750;text-transform:none;letter-spacing:-.02em;color:var(--text);margin-bottom:16px}
.settingRow{border:0;border-top:1px solid var(--edge);border-radius:0;background:transparent;padding:20px 0;margin:0;min-height:84px}
.settingRow:last-child{border-bottom:1px solid var(--edge)}
.settingRow b{font-size:16px}
.settingRow span{font-size:14px;line-height:1.6;max-width:52ch}
.dangerSetting b{color:var(--bad)}
.switchToggle{width:52px;height:32px;border:1px solid var(--edge2);box-shadow:none}
.switchToggle i{height:24px;width:24px;top:3px;left:3px;background:var(--card)}
.switchToggle.on{background:var(--accent)}
.switchToggle.on i{transform:translateX(20px)}
.settingsLinks{grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
.settingsLinks a{padding:16px;font-size:14px;font-weight:700;border-radius:8px;min-height:52px}

/* Dialogs, pricing, notifications, and secondary states. */
.modal{background:rgb(15 14 21 / .7);padding:24px}
.modalCard{border:1px solid var(--edge2);border-radius:12px;padding:32px;max-height:calc(100dvh - 48px);overflow-y:auto;box-shadow:var(--shadow-lg);animation:paperDialogIn .2s var(--ease)}
.modalCard h3{font-family:var(--font-display);font-weight:400;font-size:24px;line-height:1.25;margin:8px 0 16px}
.modalCard p{font-size:15px;line-height:1.65}
.modalX{width:44px;height:44px;top:8px;right:8px}
.ogBadge{background:var(--yellow);color:var(--ink);box-shadow:0 4px 0 var(--yellow-edge);border-radius:12px}
.ogDone{background:var(--good-soft);color:var(--good);box-shadow:none}
.ogItems li{border-radius:8px}
.plansScreen{padding:88px var(--page-gutter) 64px;background:var(--bg)}
.plansInner{max-width:1020px;animation:none}
.plansInner h1{font-family:var(--font-display);font-weight:400;font-size:clamp(30px,4vw,52px);line-height:1.15;margin:16px auto 24px;max-width:18ch}
.plansSub{font-size:16px;max-width:58ch;line-height:1.7;margin-bottom:40px}
.plansBack{min-height:44px;top:20px;left:var(--page-gutter)}
.tierGrid{gap:24px}
.tierBox{padding:32px;border-radius:12px;gap:20px;border:1px solid var(--edge2);box-shadow:none}
.tierBox h4{font-family:var(--font-display);font-weight:400;font-size:30px;padding-right:0;margin-top:36px}
.tierPrice{font-family:var(--font-hud);font-size:40px;letter-spacing:-.03em}
.tierBest{border:2px solid var(--text);background:var(--card);box-shadow:none}
.tierTag{background:var(--yellow);color:var(--ink);border-radius:4px;font-family:var(--font-hud);font-size:10px;letter-spacing:.06em}
.tierTagPremium{background:var(--text);color:var(--bg);border-color:var(--text)}
.tierBox ul{font-size:15px;gap:14px}
.tierDesc{line-height:1.6}
#toast,:root[data-theme="dark"] #toast{background:var(--ink-3);color:var(--paper);border:1px solid var(--screen-line);border-radius:10px;font-size:14px;padding:14px 20px;box-shadow:var(--shadow-lg);max-width:calc(100vw - 32px)}
.honestyNote{border-radius:8px;background:var(--sun-soft);border-color:var(--sun-line);color:var(--sun)}
.loadingBox{padding:40px 24px;border-radius:12px;background:var(--card);font-size:16px}
.spinner{border-color:var(--edge);border-top-color:var(--accent)}

/* Games keep their artwork, geometry and timing; surrounding UI speaks Study64. */
.btPanel,.btArena{background:var(--ink-2);border-color:var(--screen-line);border-radius:12px;color:var(--paper)}
.btTitleLg{font-family:var(--font-display);font-weight:400;font-size:clamp(22px,3vw,34px);line-height:1.35;color:var(--paper);text-shadow:none}
.btModeCard{background:var(--ink-3);border:1px solid var(--screen-line);border-radius:10px;box-shadow:none}
.btModeCardTitle{font-family:var(--font-body);font-size:20px;font-weight:750}
.btPanel input{background:var(--ink-3);color:var(--paper);border-color:var(--screen-line)}
.btPanel input::placeholder{color:#bbb5c8}
.btPanel .btnGhost{color:var(--paper);border-color:var(--screen-line);background:transparent}
.btResultStats li{background:var(--ink-3);border-color:var(--screen-line)}
.btStatLabel{color:var(--screen-muted)}
.btStatValue{font-family:var(--font-hud)}
.custPreview,.custSection{border-radius:12px;background:var(--card);border:1px solid var(--edge);box-shadow:none}
.custTab{min-height:44px;border-radius:8px}
.custOpt{border-radius:8px}
.custOpt[aria-pressed="true"]{border-color:var(--accent);box-shadow:inset 0 0 0 1px var(--accent)}
.custSwatch{width:44px;height:44px}
.sbQText,.sbOverlay,.sbBtn{font-family:var(--font-body)}

/* Remove legacy category chips and browser button chrome. */
#settingsBtn{display:inline-flex;align-items:center;justify-content:center;padding:10px;border:1px solid var(--edge);background:transparent;color:var(--text)}
#settingsBtn .icon{width:20px;height:20px}
#settingsBtn:hover{background:var(--card);border-color:var(--edge2)}
.btnAccentSoft:hover:not(:disabled){background:var(--accent-soft);border-color:var(--accent);color:var(--accent)}
.deckCard::before{display:none}
.deckCard.newDeckCard{background-image:none;background-color:transparent;border-style:dashed;box-shadow:none}
#viewGames .gameCard .modeCta,#viewGames .gameCard:hover .modeCta{display:flex;width:100%;border:0;border-top:1px solid var(--screen-line);border-radius:0;background:transparent;color:var(--yellow);padding:14px 0 0;box-shadow:none;transform:none}
.playInvite{margin:28px 0 20px}
.customizeSnailLink{margin-bottom:0}
.moreGamesSoon{text-align:left;margin-top:24px}
.custPoseBtn{min-height:44px;border-radius:8px;font-size:14px}
.custPoseBtn[aria-pressed="true"]{background:var(--text);color:var(--bg);border-color:var(--text)}
.btModeCardDesc{font-size:14px;line-height:1.6;color:var(--screen-muted)}
.sdHint,.sdHighNote.isOld,.sdReviewSub,.sdRunCard p span,.sdRunCard p i,.sdRunList h5,.sdRunEmpty{color:var(--screen-muted)}
.sdOverlay .btnGhost:hover,#viewGameBrainTrivia .btPanel .btnGhost:hover{background:var(--ink-3);border-color:var(--screen-muted);color:var(--paper)}
.sdMissTitle{color:var(--screen-muted)}
.btTitle{font-family:var(--font-display);font-weight:400;font-size:clamp(22px,3vw,32px);line-height:1.3;color:var(--paper);letter-spacing:-.02em}
.landingGameEmbed .sdMusicBtn,.landingGameEmbed .btMusicBtn{background:var(--ink-3);border-color:var(--screen-line);color:var(--paper)}
.sdOverTitle{font-family:var(--font-display);font-weight:400;color:var(--paper);font-size:26px;letter-spacing:-.02em}
.sdMusicBtn,.btMusicBtn{width:44px;height:44px;border-radius:8px}
.sbDev{max-width:580px;padding:32px;background:var(--card);border:1px solid var(--edge);border-radius:12px;color:var(--text);margin:32px auto;gap:20px}
.sbDevTitle{font-family:var(--font-display);font-weight:400;font-size:28px;line-height:1.3}
.sbDev .sbEarly{font-family:var(--font-hud);border-radius:4px;font-size:10px;background:var(--sun-soft);color:var(--sun);border-color:var(--sun-line)}
.sbDev .sbNotice{background:var(--sun-soft);color:var(--sun);border:1px solid var(--sun-line);font-size:14px;line-height:1.6;border-radius:8px;padding:16px}
.sbDev input,.sbDev select{background:var(--card);color:var(--text);border:1px solid var(--edge2);min-width:0;min-height:48px;font-size:16px}
.sbPrimary,.sbDemoBtn{background:var(--yellow);color:#0f0e15;box-shadow:0 4px 0 var(--yellow-edge);border:1px solid transparent}
.sbPrimary:active:not(:disabled){transform:translateY(3px);box-shadow:0 1px 0 var(--yellow-edge)}
.sbDev .btn:not(.sbPrimary){background:transparent;color:var(--text);border:1px solid var(--edge2);box-shadow:0 3px 0 var(--edge)}
.sbDevRow{flex-wrap:wrap;gap:12px}
.sbDevRow>*{min-width:0;flex:1 1 160px}
@media(max-width:600px){.sbDev{padding:24px 20px;margin:16px auto}.sbDevTitle{font-size:26px}}
.emptyState{background:transparent;border:1px dashed var(--edge2);border-radius:10px;padding:40px 24px}
.emptyState h3{font-family:var(--font-display);font-size:24px;font-weight:400;line-height:1.3}
.emptyState p{font-size:15px;line-height:1.7;max-width:40ch}
.readyToPlay .demoCta{box-shadow:0 4px 0 var(--yellow-edge)}
.draftAi{background:var(--card);border-color:var(--edge);border-radius:10px}
.errBox{border:1px solid var(--bad-line);font-size:14px;line-height:1.6}
#genStatus{padding:40px 24px}
#genStatus p{font-size:16px}
body.dialogOpen{overflow:hidden}
body.dialogOpen .appSkip{visibility:hidden}

/* Read surfaces: roomy editorial typography on warm stock. */
.legalShell{width:min(1120px,calc(100% - 2 * var(--page-gutter)));padding:24px 0 64px}
.legalHeader{min-height:44px;padding-bottom:24px;margin-bottom:48px}
.legalHeader .logo img{height:34px}
.legalContent{position:relative;max-width:800px;margin:0 auto;padding:0 0 0 32px;border:0;border-left:1px solid var(--margin-red);border-radius:0;background:transparent;box-shadow:none}
.legalContent h1{font-size:clamp(36px,5vw,60px);line-height:1.12;letter-spacing:-.025em;margin-bottom:20px}
.legalUpdated{font-family:var(--font-hud);font-size:12px!important;margin-bottom:36px!important;color:var(--muted)}
.legalContent h2{font-family:var(--font-body);font-weight:750;font-size:23px;line-height:1.35;margin:36px 0 12px}
.legalContent p,.legalContent li{font-size:16px;line-height:1.8;max-width:70ch}
.legalContent p{margin-bottom:16px}
.legalContent a{color:var(--accent);overflow-wrap:anywhere}
.legalNav{gap:8px 24px;margin-top:48px;padding-top:24px}
.legalNav a{font-weight:700;min-height:44px;display:inline-flex;align-items:center}
.supportContact{background:var(--ink);color:var(--paper);border:0;border-radius:10px;padding:24px;margin:28px 0}
.supportContact a{color:var(--yellow);font-weight:700}

@media(hover:hover) and (pointer:fine){
  .deckCard:hover,.deckGame:hover,.deckStudy:hover,.createChoice:hover{transform:translateY(-2px);border-color:var(--text);box-shadow:var(--shadow)}
  .gameCard.modeCard:hover{transform:translateY(-3px);border-color:var(--screen-muted);box-shadow:none}
}
@keyframes paperDialogIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
@media(max-width:1000px){
  .shell{padding-left:28px;padding-right:28px}
  #viewGames{padding:28px}
  .gameModeGrid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .gameCard .gameHead h3{font-size:19px}
  .authWrap{gap:40px;padding-top:32px}
  .authStory h1{font-size:44px}
  .authCard{padding:28px}
}
@media(max-width:760px){
  .authWrap{display:block;max-width:520px;padding:24px 20px 48px}
  .authStory{padding-top:0;margin-bottom:28px}
  .authStory h1{font-size:34px;max-width:none;margin-bottom:12px}
  .authStory h1 span{display:inline}
  .authStory>p{font-size:15px;max-width:40ch}
  .authNote,.authStory .featList{display:none}
  .authCard{max-width:none}
  .statGrid{grid-template-columns:repeat(3,minmax(0,1fr))}
  .statTile{border-right:0}
  .settingsLinks{grid-template-columns:repeat(2,minmax(0,1fr))}
  .tierBox{padding:24px}
}
@media(max-width:600px){
  header.appBar,:root[data-theme="dark"] header.appBar{min-height:68px;padding:10px 20px;gap:8px}
  header.appBar .logo img{height:30px}
  .shell{padding:24px 20px 56px}
  h2.viewTitle{font-size:30px}
  .viewSub{font-size:15px;margin-bottom:24px}
  #viewGames{padding:24px 20px;margin:0 -8px;border-radius:12px}
  #viewGames .viewTitle{font-size:42px}
  .gameModeGrid{grid-template-columns:minmax(0,1fr);gap:20px}
  .gameCard .gameBody{padding:20px}
  .hasShot .gameShot{aspect-ratio:16/10}
  .playInvite,.playDemoCta{gap:16px}
  .playInvite .btn,.playDemoCta .btn{width:100%}
  .mobileMenuPanel{background:var(--bg);border-left:1px solid var(--edge);padding:24px;box-shadow:none}
  .mobileMenuHead{border-bottom:1px solid var(--edge);padding-bottom:20px;margin-bottom:20px}
  .mobileMenuHead>span{font-family:var(--font-display);font-weight:400;font-size:28px}
  .mobileMenuLink{min-height:56px;border-radius:8px;font-size:19px;padding:12px 16px}
  .mobileMenuLink.active{background:var(--text);color:var(--bg);border-color:var(--text)}
  .mobileUsagePill{font-family:var(--font-hud);border-radius:8px;padding:16px;font-size:12px}
  .mobileMenuActions{gap:16px}
  .dailyGoal{padding:20px}
  .dailyGoalHead{align-items:flex-start;flex-wrap:wrap;gap:10px}
  .dashTop{margin-bottom:24px}
  .dashTopRight{width:100%;display:flex;align-items:center;gap:12px}
  #inviteBtn{white-space:normal;text-align:left;font-size:12px}
  .panel,.qCard,.tutorPanel,.draftItem{padding:20px}
  .srcTabs{gap:8px}
  .srcTab{flex:1 1 auto;font-size:12px;padding:10px}
  .createChoices{gap:16px;margin-top:24px}
  .createChoice{padding:24px;min-height:190px}
  .createChoice strong{font-size:23px}
  .studyStage{max-width:100%}
  #flashArea .flip{height:340px}
  #flashArea .flip-face{font-size:20px;padding:60px 20px 24px}
  .qText{font-size:19px}
  .ansBtn{font-size:15px}
  .statGrid{grid-template-columns:repeat(2,minmax(0,1fr));padding:8px}
  .statTile{padding:20px 12px}
  .statTile:last-child{grid-column:1/-1;border-top:1px solid var(--screen-line)}
  .statTile .statNum{font-size:30px}
  .weekPanel{padding:20px}
  .weekRow{gap:4px}
  .weekDay i{width:32px;height:36px;border-radius:6px}
  .historyHead{flex-wrap:wrap;gap:16px}
  .weekPanel h3{margin-bottom:16px}
  .settingRow{flex-direction:row;align-items:center;flex-wrap:wrap;gap:16px}
  .settingRow>div:first-child{flex:1 1 180px}
  .settingRow .btn{width:auto}
  .settingsGroup{margin:28px 0}
  .modal{padding:16px}
  .modalCard{width:100%;padding:28px 20px;max-height:calc(100dvh - 32px)}
  .modalCard h3{font-size:22px;padding-right:20px}
  .plansScreen{padding:80px 20px 40px}
  .plansInner h1{font-size:32px}
  .legalShell{width:calc(100% - 40px);padding-top:20px}
  .legalHeader{flex-direction:row;align-items:center;gap:16px;margin-bottom:36px}
  .legalHeader .logo img{height:28px}
  .legalBack{font-size:12px;text-align:right}
  .legalContent{padding-left:20px}
  .legalContent h1{font-size:34px;overflow-wrap:anywhere}
  .legalContent h2{font-size:21px}
  .legalContent p,.legalContent li{font-size:15px}
  .supportContact{padding:20px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
}
/* Printed study sheets retain their existing document layout. */
@media print{body{background:#fff;color:#000}.appSkip{display:none}.shell{max-width:none;padding:0}}