:root {
  --paper:#f5f5f7; --surface:#ffffff; --ink:#20242d; --muted:#707580;
  --accent:#315cda; --line:#20242d10; --sea:#e9eef8; --radius:20px;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  color:var(--ink);background:var(--paper);font-synthesis:none;-webkit-text-size-adjust:100%;
}
*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer;color:inherit;border:0;background:none;touch-action:manipulation}a{color:inherit}button,a,select,summary{outline-offset:4px}button:focus-visible,a:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #315cda}button:disabled{cursor:default}button:not(:disabled){transition:background .16s,transform .16s,opacity .16s}button:active:not(:disabled){transform:scale(.985)}[hidden]{display:none!important}svg{display:block}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.topbar{max-width:640px;margin:auto;height:calc(58px + env(safe-area-inset-top));padding:env(safe-area-inset-top) 20px 0;display:flex;align-items:center;justify-content:space-between}.back{display:flex;align-items:center;gap:2px;font-size:17px;letter-spacing:-.4px;text-decoration:none;min-height:44px;margin-left:-7px;padding-right:12px;color:var(--accent)}.back svg{width:25px;height:25px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}.icon-button{height:44px;width:44px;border-radius:50%;display:grid;place-items:center;background:#e8ebf2}.icon-button svg{width:21px;height:21px}.icon-button:hover{background:#dce3f3}
#home{max-width:640px;margin:auto;padding:0 20px}.page-heading{padding:9px 0 24px}.page-heading h1{font-size:36px;line-height:1.15;letter-spacing:-1.6px;font-weight:730;margin:0;display:flex;align-items:center;gap:12px}.atlas-mark{display:inline-block;color:#5475d4;margin-top:4px}.atlas-mark svg{width:28px;height:28px;fill:none;stroke:currentColor;stroke-width:1.3}
.modes{position:relative;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:2px;padding:3px;border-radius:12px;background:#e6e7ec;margin:0 0 25px;min-height:44px}.modes button{padding:8px 4px;border-radius:9px;font-size:13px;font-weight:600;white-space:nowrap;letter-spacing:-.2px;min-width:0;min-height:44px}.modes button[aria-pressed=true]{background:var(--surface);box-shadow:0 1px 4px #20242d17,0 1px 1px #20242d0a}.modes button:not([aria-pressed=true]):hover{background:#ffffff30}.list-heading{display:flex;justify-content:space-between;align-items:center;padding:0 4px 10px;color:var(--muted);font-size:12px;font-weight:500}.list-heading>span:first-child{font-size:13px}.regions{background:var(--surface);border-radius:var(--radius);overflow:hidden;box-shadow:0 1px 2px #20242d03}.region-card{position:relative;display:flex;align-items:center;gap:15px;min-height:76px;width:100%;padding:9px 18px 9px 12px;text-align:left}.region-card:not(:last-child)::after{content:"";position:absolute;bottom:0;left:90px;right:0;height:1px;background:var(--line)}.region-card:hover{background:#f2f4fa}.region-card:active{background:#e9edf7;transform:none!important}.card-map{width:62px;height:54px;border-radius:12px;flex:none;background:#eaf0fd;padding:5px}.card-map path,.sheet-map path{fill:#8299ce;stroke:#f9faff;stroke-width:.5;stroke-linejoin:round}.region-card:nth-child(2) .card-map,.region-card:nth-child(8) .card-map{background:#e9edf8}.region-card:nth-child(2) .card-map path,.region-card:nth-child(8) .card-map path{fill:#7f92c3}.region-card:nth-child(3) .card-map,.region-card:nth-child(4) .card-map{background:#efecf9}.region-card:nth-child(3) .card-map path,.region-card:nth-child(4) .card-map path{fill:#9a8ec3}.card-body{flex:1;min-width:0}.card-body strong{display:block;font-size:16px;font-weight:600;letter-spacing:-.35px;line-height:1.35}.card-sub{display:block;font-size:12px;color:var(--muted);margin-top:3px}.card-accessory{display:flex;align-items:center;gap:14px}.chevron{width:7px;height:7px;border-top:1.5px solid currentColor;border-right:1.5px solid currentColor;transform:rotate(45deg);color:#a6abb5;display:block;flex:none}.mastery-ring{width:18px;height:18px;border-radius:50%;background:conic-gradient(#5475d4 var(--progress),#e5e9f2 0);position:relative}.mastery-ring::after{content:"";position:absolute;inset:3px;border-radius:50%;background:var(--surface)}.home-footer{display:flex;justify-content:center;padding:12px 0 calc(18px + env(safe-area-inset-bottom))}.text-button{font-size:13px;font-weight:500;min-height:44px;padding:10px 12px;color:var(--muted)}
.resume{display:flex;align-items:center;gap:13px;width:100%;text-align:left;border-radius:17px;padding:16px;margin:0 0 22px;background:#e5ecfc}.resume-icon{display:grid;place-items:center;width:38px;height:38px;border-radius:50%;background:var(--accent);color:var(--surface);flex:none}.resume-icon svg{width:19px;height:19px;fill:currentColor;margin-left:1px}.resume strong{font-size:15px;letter-spacing:-.25px;font-weight:650}.resume small{display:block;font-size:12px;color:#606d8d;margin-top:4px}.resume .chevron{margin-left:auto;color:#8191b8}#storage-warning{padding:14px;background:#fff0db;border-radius:12px;font-size:13px;line-height:1.5}.loading{font-size:14px;padding:24px;color:var(--muted)}.primary{min-height:50px;border-radius:15px;background:var(--accent);color:#ffffff;font-size:16px;font-weight:600;letter-spacing:-.25px;padding:13px 22px}.primary:hover{background:#244dc2}.primary:disabled{opacity:.45}.quiet-button{min-height:48px;border-radius:15px;padding:12px 16px;font-size:15px;font-weight:550;background:#e8edf9;color:var(--accent)}.quiet-button:hover{background:#dde5f8}.full{width:100%;margin-top:10px}.subtle{font-size:13px!important;line-height:1.55;color:var(--muted)}
/* One navigation bar and a stable, thumb-accessible action area. */
body.playing{background:var(--paper)}body.playing>.topbar{display:none}#game{max-width:960px;margin:auto;min-height:580px;height:100svh;height:100dvh;padding-top:env(safe-area-inset-top);display:grid;grid-template-rows:auto auto minmax(200px,1fr) auto}.game-top{display:grid;grid-template-columns:64px 1fr 64px;align-items:center;gap:8px;min-height:62px;padding:6px 20px}.game-top .quiet-button{display:grid;place-items:center;width:44px;min-height:44px;border-radius:50%;background:#e8ebf2;padding:0}.game-top svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:2.2;stroke-linecap:round}#game-name{text-align:center;font-size:13px;font-weight:550;color:var(--muted);letter-spacing:-.15px}#timer{text-align:right;font-size:13px;font-variant-numeric:tabular-nums;color:var(--muted)}.question-header{width:100%;max-width:680px;margin:auto;padding:10px 24px 0;text-align:center}.eyebrow{font-size:13px;color:var(--muted);font-weight:500;margin:0 0 8px;line-height:1.4}.question-header h1{font-size:32px;font-weight:680;line-height:1.14;letter-spacing:-1px;margin:0 0 20px;outline:none;overflow-wrap:anywhere}.round-meta{display:flex;justify-content:space-between;min-height:15px;margin-bottom:8px;font-size:11px;font-weight:500;font-variant-numeric:tabular-nums;color:var(--muted)}.progress-track{height:3px;border-radius:2px;background:#e1e5ef;overflow:hidden}.progress-track>div{height:100%;border-radius:2px;background:#5475d4;transition:width .25s}
.map-shell{position:relative;min-height:0;margin:14px 12px 0;border-radius:22px;background:var(--sea);overflow:hidden;isolation:isolate}.map-shell>svg{width:100%;height:100%;display:block;touch-action:none}.map-shell .land{fill:#b8c9e9;stroke:#f8faff;stroke-width:1.3;vector-effect:non-scaling-stroke;stroke-linejoin:round}.map-shell .land.inactive{fill:#dde4ee;stroke:#edf1f7;pointer-events:none}.map-shell .land.active{cursor:pointer}@media(hover:hover){.map-shell .land.active:hover{fill:#96b2e4}}.map-shell .land.correct,.map-shell .land.correct:hover{fill:#4d78db}.map-shell .land.wrong{fill:#d78c82}.map-shell .land.reveal,.map-shell .land.reveal:hover{fill:#e6bb72;stroke:#99702e;stroke-width:2}.map-shell .marker{fill:#829ed8;stroke:#ffffff;stroke-width:1.5;cursor:pointer}.map-shell .marker.correct{fill:#4d78db}.map-shell .marker.wrong{fill:#d78c82}.map-shell .marker.reveal{fill:#e6bb72;stroke:#99702e}.map-shell .marker-hit{fill:transparent;stroke:none;cursor:pointer}.map-controls{position:absolute;top:12px;right:12px;display:flex;flex-direction:column;border-radius:15px;overflow:hidden;box-shadow:0 2px 10px #25334d10;background:#ffffffed;backdrop-filter:blur(12px)}.map-controls button{width:44px;height:44px;font-size:24px;line-height:1;display:grid;place-items:center}.map-controls button:not(:last-child){border-bottom:1px solid var(--line)}.map-controls button:hover{background:#e9edf7}.map-controls svg,.map-list-toggle svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round}.map-list-toggle{position:absolute;right:12px;bottom:12px;display:grid;place-items:center;width:44px;height:44px;border-radius:50%;background:#ffffffed;backdrop-filter:blur(12px);box-shadow:0 2px 10px #25334d0a}#map-list{position:absolute;bottom:66px;right:12px;left:12px;background:var(--surface);padding:16px;box-shadow:0 4px 25px #25334d1c;border-radius:17px;display:flex;align-items:center;flex-wrap:wrap;gap:10px}#map-list label{font-size:13px;width:100%;font-weight:550}#country-select{min-width:0;flex:1;min-height:48px;font-size:16px;color:var(--ink);border:1px solid #d9deea;border-radius:10px;padding:9px;background:#f7f8fc}
.game-bottom{width:100%;max-width:680px;margin:auto;padding:10px 20px calc(16px + env(safe-area-inset-bottom));background:var(--paper)}#feedback{display:flex;align-items:center;justify-content:center;text-align:center;font-size:13px;line-height:1.4;min-height:36px;margin:0 0 5px;color:var(--muted)}#feedback[data-tone=correct]{color:#315cbd}#feedback[data-tone=wrong]{color:#a04f45}.game-actions{display:flex;align-items:center;gap:14px;min-height:50px}.game-actions .primary{margin-left:auto;min-width:138px}.game-actions .quiet-button{background:none;color:var(--muted);padding-inline:8px;font-size:14px}.game-actions .quiet-button:disabled{opacity:.4}#attempt-dots{margin-left:auto;font-size:12px;color:#8196c6;letter-spacing:4px}
.quiz-shell{width:100%;max-width:620px;margin:auto;padding:8px 24px 0;height:100%;min-height:0;display:flex;flex-direction:column;gap:24px}#quiz-visual{flex:1;min-height:100px;display:flex;align-items:center;justify-content:center;padding:20px}#quiz-visual img{width:auto;max-width:80%;max-height:190px;height:min(21svh,190px);object-fit:contain;box-shadow:0 10px 30px #25334d10;border-radius:5px}.choices{display:grid;grid-template-columns:1fr 1fr;gap:10px}.choice{position:relative;min-height:65px;padding:18px 12px;border:1.5px solid transparent;border-radius:16px;background:var(--surface);font-size:15px;font-weight:550;line-height:1.3;letter-spacing:-.2px}.choice:hover:not(:disabled){background:#eaf0fc}.choice.wrong{background:#f8e5e1;border-color:#d8a299;color:#944a40}.choice.correct{background:#e2ebff;border-color:#8aa8eb;color:#284fae}.choice.reveal{background:#f8ebcc;border-color:#c7a566;color:#745723}.choice:disabled:not(.correct):not(.reveal):not(.wrong){opacity:.45}
/* Native dialog semantics with a compact sheet presentation on phones. */
dialog{width:min(430px,calc(100% - 40px));max-height:calc(100svh - 50px);padding:32px 26px 24px;border:0;border-radius:26px;background:var(--paper);color:var(--ink);box-shadow:0 25px 90px #25334d26;overflow:auto;overscroll-behavior:contain}dialog[open]{animation:sheet-enter .24s cubic-bezier(.2,.8,.2,1)}dialog::backdrop{background:#20273340;backdrop-filter:blur(3px)}dialog h2{font-size:27px;font-weight:680;line-height:1.15;letter-spacing:-.8px;margin:8px 42px 20px 0}dialog p:not(.eyebrow){font-size:14px;line-height:1.6;color:#707580}.dialog-close{position:absolute;top:17px;right:16px;width:44px;height:44px;display:grid;place-items:center;font-size:26px;font-weight:400;border-radius:50%;background:#e6e8ef;color:#707580;z-index:1}.sheet-map{height:118px;margin:2px 35px 16px 0}.sheet-map svg{width:100%;height:100%}.sheet-map path{fill:#839cce;stroke-width:.65}#start-dialog .eyebrow{margin-bottom:5px}#start-dialog h2{margin-top:0;margin-bottom:8px}.start-facts{font-size:14px;color:var(--muted);margin:0 0 20px}.result-score{font-size:70px;font-weight:650;letter-spacing:-4px;line-height:1.1;color:#315cda;font-variant-numeric:tabular-nums;margin:24px 0 14px}.result-facts{display:flex;gap:18px;padding:14px 0;margin-bottom:12px;border-block:1px solid #20242d10;font-size:13px;color:var(--muted)}.stats-numbers{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:24px 0 18px}.stats-numbers>div{padding:18px 16px;background:#e7edfa;border-radius:16px}.stats-numbers strong{display:block;font-size:35px;font-weight:650;letter-spacing:-1px;font-variant-numeric:tabular-nums}.stats-numbers span{display:block;font-size:12px;margin-top:6px;color:var(--muted)}.history-row{display:flex;align-items:center;justify-content:space-between;padding:15px 0;border-top:1px solid var(--line);gap:12px}.history-row strong{font-size:13px;font-weight:550}.history-row small{display:block;font-size:11px;color:var(--muted);margin-top:5px}.history-row b{font-size:17px;font-weight:600;color:#315cda}details{border-top:1px solid var(--line);font-size:13px}summary{cursor:pointer;min-height:48px;align-content:center;color:var(--muted);padding:12px 0}details p{margin:0 0 16px}.stats-explainer{margin-bottom:14px}.backup{margin-top:18px}.backup-actions{display:flex;gap:10px;margin-bottom:10px}.backup-actions>*{flex:1;font-size:14px}.study-mode .map-shell .land.active{cursor:help}@keyframes sheet-enter{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}
@media(max-width:600px){dialog{position:fixed;inset:auto 0 0;margin:0 auto;width:100%;max-width:none;max-height:calc(100dvh - env(safe-area-inset-top) - 30px);border-radius:28px 28px 0 0;padding:36px 24px calc(22px + env(safe-area-inset-bottom));box-shadow:0 -10px 60px #25334d14}dialog::before{content:"";position:absolute;top:10px;left:calc(50% - 17px);height:4px;width:34px;border-radius:3px;background:#cbd0da}dialog[open]{animation:sheet-enter .28s cubic-bezier(.2,.8,.2,1)}}
@media(min-width:700px){.topbar{padding-top:20px;height:76px}#home{padding-bottom:25px}.page-heading{padding:18px 0 28px}.page-heading h1{font-size:40px}.region-card{min-height:80px}#game{padding:12px 20px 0}.map-shell{margin:16px 0 0}.game-top{padding-inline:4px}.game-bottom{padding-bottom:20px}}
@media(max-width:360px){#home{padding-inline:16px}.topbar{padding-inline:16px}.page-heading{padding-bottom:20px}.page-heading h1{font-size:34px}.modes{margin-bottom:22px}.modes button{font-size:12px}.region-card{min-height:71px;padding-inline:10px 15px;gap:12px}.region-card:not(:last-child)::after{left:80px}.card-map{width:56px;height:49px}.card-body strong{font-size:15px}.game-top{padding-inline:16px;min-height:56px}.question-header{padding-top:5px;padding-inline:20px}.question-header h1{font-size:27px;margin-bottom:14px}.quiz-shell{padding-inline:16px;gap:12px}.choice{font-size:14px;min-height:59px}.game-bottom{padding:7px 16px calc(12px + env(safe-area-inset-bottom))}}
@media(max-height:650px){#game{min-height:520px}.game-top{min-height:52px}.question-header{padding-top:4px}.question-header h1{font-size:27px;margin-bottom:12px}.question-header .eyebrow{font-size:12px;margin-bottom:5px}.map-shell{margin-top:10px}.game-bottom{padding-top:5px}#feedback{min-height:28px;font-size:12px}.game-actions,.game-actions .primary{min-height:46px}.quiz-shell{gap:12px}#quiz-visual{padding:8px;min-height:85px}#quiz-visual img{max-height:100px}.choice{min-height:52px;padding-block:12px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
/* Statistics stay inside the sheet, with details one tap away. */
dialog::before{display:none}
.stats-filters{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:24px 0 16px}
.stats-filters label{min-width:0;font-size:12px;color:var(--muted)}
.stats-filters select{display:block;width:100%;min-height:48px;margin-top:6px;padding:10px 8px;border:1px solid #c9ceda;border-radius:12px;background:var(--surface);color:var(--ink);font-size:16px}
.stats-numbers{margin:16px 0;gap:12px}.stats-numbers>div{padding:16px 12px;background:var(--surface)}
.stats-numbers strong{font-size:clamp(24px,7vw,32px);letter-spacing:-1px;white-space:nowrap}.stats-numbers span{line-height:1.4}
.stat-list{margin:8px 0 16px}.stat-row{display:flex;justify-content:space-between;gap:16px;padding:11px 0;border-bottom:1px solid var(--line);font-size:13px;line-height:1.4}.stat-row>span{color:var(--muted)}.stat-row strong{font-weight:600;font-variant-numeric:tabular-nums;text-align:right}
.stats-heading{font-size:15px;font-weight:600;margin:24px 0 8px;letter-spacing:-.2px}
.history-row{border:0;list-style:none;padding:12px 0;min-height:60px;color:var(--ink)}.history-row::-webkit-details-marker{display:none}.history-row strong{font-size:13px}.history-row small{font-size:12px}.history-value{text-align:right;flex:none;font-variant-numeric:tabular-nums}.history-value b{color:var(--accent);font-size:16px}
.history-row::after{content:"";width:6px;height:6px;border-right:1.5px solid var(--muted);border-bottom:1.5px solid var(--muted);transform:rotate(45deg);margin:0 3px 4px 0;flex:none}.history-row>span:first-child{flex:1}.history-entry[open]>.history-row::after{transform:rotate(225deg);margin-top:6px}
.history-section{margin-top:20px}.history-section>summary{font-weight:600;color:var(--ink)}.stats-explainer{margin:16px 0 0}.backup{margin-top:0}
dialog .record-note{color:var(--accent);font-weight:600;font-size:13px;margin:0 0 12px}#start-record{display:block;font-size:13px;margin-top:8px;color:var(--accent)}
#result-details{margin-bottom:12px}.result-facts{flex-wrap:wrap;margin-bottom:0}.missed-list{overflow-wrap:anywhere}.stats-empty{margin:24px 0}