:root{
  --cobalt:#1B3F8B;
  --cobalt-2:#2D5BB8;
  --ink:#0F2350;
  --text:#1A2440;
  --muted:#5A6684;
  --bg:#F3F6FB;
  --surface:#FFFFFF;
  --line:#D6DEEC;
  --azure:#DFE8F8;
  --lemon:#F2C230;
  --lemon-soft:#FCF1C7;
  --ok:#23804F;
  --ok-soft:#DDF2E5;
  --ko:#C63A2F;
  --ko-soft:#FBE3E0;
  --focus:#F2C230;
  --radius-s:8px;
  --radius-m:14px;
  --radius-l:22px;
  --shadow:0 1px 0 rgba(15,35,80,.06),0 6px 18px -10px rgba(15,35,80,.25);
  --font:"Atkinson Hyperlegible",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  --safe-t:env(safe-area-inset-top,0px);
  --safe-b:env(safe-area-inset-bottom,0px);
  color-scheme:light;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --cobalt:#5B86E0;--cobalt-2:#7FA3EE;--ink:#E6EDFB;--text:#E3E9F6;--muted:#9AA7C4;
    --bg:#0B1430;--surface:#14204A;--line:#28376A;--azure:#1C2C5E;
    --lemon:#F2C230;--lemon-soft:#3A3416;--ok:#4CC383;--ok-soft:#173A2B;--ko:#F0776B;--ko-soft:#4A1E1D;
    --shadow:0 1px 0 rgba(0,0,0,.3),0 8px 20px -12px rgba(0,0,0,.7);color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --cobalt:#5B86E0;--cobalt-2:#7FA3EE;--ink:#E6EDFB;--text:#E3E9F6;--muted:#9AA7C4;
  --bg:#0B1430;--surface:#14204A;--line:#28376A;--azure:#1C2C5E;
  --lemon:#F2C230;--lemon-soft:#3A3416;--ok:#4CC383;--ok-soft:#173A2B;--ko:#F0776B;--ko-soft:#4A1E1D;
  --shadow:0 1px 0 rgba(0,0,0,.3),0 8px 20px -12px rgba(0,0,0,.7);color-scheme:dark;
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font);font-size:17px;line-height:1.45;-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent;overscroll-behavior-y:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer;touch-action:manipulation}
button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
h1,h2,h3{margin:0;color:var(--ink);line-height:1.15}
p{margin:0}
.boot{padding:40vh 16px 0;text-align:center;color:var(--muted)}
.wrap{max-width:680px;margin:0 auto;padding:0 16px}
#app{min-height:100vh;padding-bottom:calc(84px + var(--safe-b))}
body.fullscreen #app{padding-bottom:0}

/* ---------- Header with majolica band ---------- */
.hero{background-color:var(--cobalt);color:#fff;padding:calc(var(--safe-t) + 22px) 0 26px;position:relative;overflow:hidden;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='56' height='56' viewBox='0 0 56 56'%3E%3Cg fill='none' stroke='%23ffffff' stroke-opacity='.13' stroke-width='1.4'%3E%3Cpath d='M28 6c6 8 6 14 0 22-6-8-6-14 0-22zM28 50c6-8 6-14 0-22-6 8-6 14 0 22zM6 28c8-6 14-6 22 0-8 6-14 6-22 0zM50 28c-8-6-14-6-22 0 8 6 14 6 22 0z'/%3E%3Ccircle cx='28' cy='28' r='3'/%3E%3Cpath d='M0 0l10 10M56 0L46 10M0 56l10-10M56 56L46 46'/%3E%3C/g%3E%3C/svg%3E");}
:root[data-theme="dark"] .hero{background-color:#13286A}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .hero{background-color:#13286A}}
.hero h1{color:#fff;font-size:28px;letter-spacing:-.01em}
.hero .sub{opacity:.85;margin-top:6px;font-size:15px}
.hero .lemonbar{height:5px;background:var(--lemon);position:absolute;left:0;right:0;bottom:0}

.page-title{padding:calc(var(--safe-t) + 22px) 0 6px}
.page-title h1{font-size:28px}
.page-title p{color:var(--muted);margin-top:4px}

/* ---------- Cards & buttons ---------- */
.section{margin-top:22px}
.section > h2{font-size:19px;margin-bottom:10px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-m);padding:16px;box-shadow:var(--shadow)}
.btn{display:flex;align-items:center;justify-content:center;gap:8px;min-height:52px;padding:12px 18px;border-radius:var(--radius-m);font-weight:700;font-size:17px;width:100%;transition:transform .08s ease,background-color .15s ease}
.btn:active{transform:scale(.98)}
.btn-primary{background:var(--cobalt);color:#fff}
:root[data-theme="dark"] .btn-primary{color:#0B1430}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .btn-primary{color:#0B1430}}
.btn-lemon{background:var(--lemon);color:#2A2205}
.btn-ghost{background:var(--surface);border:1.5px solid var(--line);color:var(--ink)}
.btn-danger{background:var(--ko-soft);color:var(--ko)}
.btn[disabled]{opacity:.45;pointer-events:none}
.btn-row{display:flex;gap:10px}
.btn-row .btn{flex:1}

.next{margin-top:-18px;position:relative;z-index:2}
.next .card{padding:18px}
.next .kicker{color:var(--muted);font-size:15px}
.next h2{font-size:24px;margin:2px 0 4px}
.next .meta{color:var(--muted);font-size:15px;margin-bottom:14px}
.resume{border-left:6px solid var(--lemon)}
.progressline{height:8px;background:var(--azure);border-radius:99px;overflow:hidden;margin:10px 0 14px}
.progressline i{display:block;height:100%;background:var(--cobalt);border-radius:99px}

.modes{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.mode{text-align:left;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-m);padding:14px;min-height:96px;display:flex;flex-direction:column;justify-content:space-between;box-shadow:var(--shadow)}
.mode strong{font-size:16px;color:var(--ink);display:block}
.mode span{font-size:14px;color:var(--muted)}
.mode:active{transform:scale(.98)}

/* ---------- Tile grid (the memorable piece) ---------- */
.tiles-head{display:flex;justify-content:space-between;align-items:baseline;gap:12px;margin-bottom:10px}
.tiles-head h2{font-size:19px}
.tiles-head span{color:var(--muted);font-size:15px}
.tiles{display:grid;grid-template-columns:repeat(5,1fr);gap:7px}
@media (min-width:520px){.tiles{grid-template-columns:repeat(10,1fr)}}
.tile{aspect-ratio:1;border-radius:9px;position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;background:var(--surface);border:1.5px solid var(--line);color:var(--muted);font-weight:700;font-size:16px;line-height:1}
.tile::before{content:"";position:absolute;inset:4px;border-radius:6px;border:1px dashed var(--line);pointer-events:none}
.tile small{font-size:11px;font-weight:700;margin-top:3px;opacity:.9}
.tile.s4{background:var(--cobalt);border-color:var(--cobalt);color:#fff}
.tile.s3{background:var(--azure);border-color:var(--cobalt-2);color:var(--ink)}
.tile.s2{background:var(--lemon-soft);border-color:var(--lemon);color:var(--ink)}
.tile.s1{background:var(--ko-soft);border-color:var(--ko);color:var(--ko)}
.tile.s4::before,.tile.s3::before,.tile.s2::before,.tile.s1::before{border-color:currentColor;opacity:.25}
.tile.cur{box-shadow:0 0 0 3px var(--lemon)}
.tile.prog::after{content:"";position:absolute;top:5px;right:5px;width:7px;height:7px;border-radius:50%;background:var(--lemon)}
:root[data-theme="dark"] .tile.s4{color:#0B1430}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .tile.s4{color:#0B1430}}
.legend{display:flex;flex-wrap:wrap;gap:6px 14px;margin-top:12px;font-size:13px;color:var(--muted)}
.legend i{display:inline-block;width:12px;height:12px;border-radius:3px;vertical-align:-1px;margin-right:5px;border:1.5px solid var(--line)}
.legend .l4{background:var(--cobalt);border-color:var(--cobalt)}
.legend .l3{background:var(--azure);border-color:var(--cobalt-2)}
.legend .l2{background:var(--lemon-soft);border-color:var(--lemon)}
.legend .l1{background:var(--ko-soft);border-color:var(--ko)}

/* ---------- Tabs ---------- */
.tabs{position:fixed;left:0;right:0;bottom:0;z-index:20;display:flex;justify-content:center;background:color-mix(in srgb,var(--surface) 92%,transparent);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-top:1px solid var(--line);padding:6px 6px calc(6px + var(--safe-b))}
.tabs button{flex:1;max-width:150px;display:flex;flex-direction:column;align-items:center;gap:2px;padding:6px 0;font-size:12px;color:var(--muted);position:relative;border-radius:10px}
.tabs svg{width:24px;height:24px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.tabs button[aria-current="page"]{color:var(--cobalt);font-weight:700}
.tabs .badge{position:absolute;top:1px;left:calc(50% + 6px);background:var(--ko);color:#fff;font-size:11px;min-width:18px;height:18px;line-height:18px;border-radius:9px;padding:0 5px;font-weight:700}

/* ---------- Quiz ---------- */
.qbar{position:sticky;top:0;z-index:10;background:var(--bg);padding:calc(var(--safe-t) + 8px) 0 8px;border-bottom:1px solid var(--line)}
.qbar .row{display:flex;align-items:center;gap:8px}
.iconbtn{width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;flex:none}
.iconbtn svg{width:24px;height:24px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.iconbtn:active{background:var(--azure)}
.qcount{flex:1;text-align:center;font-weight:700;color:var(--ink)}
.qcount small{display:block;font-weight:400;color:var(--muted);font-size:13px}
.segbar{display:flex;gap:2px;margin-top:8px;height:6px}
.segbar i{flex:1;background:var(--line);border-radius:2px}
.segbar i.a{background:var(--cobalt)}
.segbar i.c{background:var(--lemon)}
.qbody{padding-top:22px;padding-bottom:calc(130px + var(--safe-b))}
.qtopic{display:inline-block;font-size:13px;color:var(--cobalt);background:var(--azure);padding:4px 10px;border-radius:99px;margin-bottom:12px}
.qtext{font-size:20px;line-height:1.42;color:var(--ink);font-weight:700;margin-bottom:20px}
.opts{display:flex;flex-direction:column;gap:10px}
.opt{display:flex;gap:12px;align-items:flex-start;text-align:left;width:100%;background:var(--surface);border:2px solid var(--line);border-radius:var(--radius-m);padding:14px 14px;min-height:56px;font-size:17px;line-height:1.4;transition:border-color .12s ease,background-color .12s ease}
.opt .L{flex:none;width:30px;height:30px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-weight:700;background:var(--azure);color:var(--cobalt);font-size:15px;margin-top:-2px}
.opt[aria-pressed="true"]{border-color:var(--cobalt);background:var(--azure)}
.opt[aria-pressed="true"] .L{background:var(--cobalt);color:#fff}
:root[data-theme="dark"] .opt[aria-pressed="true"] .L{color:#0B1430}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .opt[aria-pressed="true"] .L{color:#0B1430}}
.opt.correct{border-color:var(--ok);background:var(--ok-soft)}
.opt.correct .L{background:var(--ok);color:#fff}
.opt.wrong{border-color:var(--ko);background:var(--ko-soft)}
.opt.wrong .L{background:var(--ko);color:#fff}
.opt .tag{display:block;font-size:13px;font-weight:700;margin-top:4px}
.opt.correct .tag{color:var(--ok)}
.opt.wrong .tag{color:var(--ko)}
.qfoot{position:fixed;left:0;right:0;bottom:0;z-index:10;background:color-mix(in srgb,var(--bg) 94%,transparent);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-top:1px solid var(--line);padding:10px 0 calc(10px + var(--safe-b))}
.qfoot .btn{min-height:50px}
.qfoot .btn-ghost{flex:0 0 33%}
.skipnote{text-align:center;color:var(--muted);font-size:13px;margin-top:6px}

/* grid sheet */
.modal{position:fixed;inset:0;z-index:50;background:rgba(8,16,40,.45);display:flex;align-items:flex-end;justify-content:center}
.sheet{background:var(--surface);width:100%;max-width:680px;border-radius:var(--radius-l) var(--radius-l) 0 0;padding:20px 16px calc(18px + var(--safe-b));max-height:88vh;overflow:auto;animation:up .22s ease-out}
@media (min-width:700px){.modal{align-items:center}.sheet{border-radius:var(--radius-l)}}
@keyframes up{from{transform:translateY(30px);opacity:.4}to{transform:none;opacity:1}}
@media (prefers-reduced-motion:reduce){.sheet{animation:none}.btn,.opt,.mode{transition:none}}
.sheet h3{font-size:20px;margin-bottom:6px}
.sheet p{color:var(--muted);margin-bottom:16px}
.sheet .btn+.btn{margin-top:10px}
.qgrid{display:grid;grid-template-columns:repeat(6,1fr);gap:6px;margin:14px 0 16px}
@media (min-width:480px){.qgrid{grid-template-columns:repeat(10,1fr)}}
.qgrid button{height:42px;border-radius:9px;border:1.5px solid var(--line);font-weight:700;font-size:15px;color:var(--muted)}
.qgrid button.a{background:var(--azure);border-color:var(--cobalt-2);color:var(--ink)}
.qgrid button.cur{box-shadow:0 0 0 3px var(--lemon)}
.qgrid button.ok{background:var(--ok-soft);border-color:var(--ok);color:var(--ok)}
.qgrid button.ko{background:var(--ko-soft);border-color:var(--ko);color:var(--ko)}

/* ---------- Results ---------- */
.score{padding:calc(var(--safe-t) + 26px) 0 22px;text-align:center}
.score .pct{font-size:96px;line-height:.95;font-weight:700;letter-spacing:-.04em;color:var(--ink);font-variant-numeric:tabular-nums}
.score .pct span{font-size:44px;letter-spacing:0;color:var(--muted)}
.score .verdict{font-size:19px;font-weight:700;margin-top:10px;color:var(--ink)}
.score .what{color:var(--muted);margin-top:4px}
.trio{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:20px}
.trio div{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-m);padding:12px 8px;text-align:center}
.trio b{display:block;font-size:26px;font-variant-numeric:tabular-nums}
.trio span{font-size:13px;color:var(--muted)}
.trio .ok b{color:var(--ok)}.trio .ko b{color:var(--ko)}.trio .bl b{color:var(--muted)}
.advice{border-left:6px solid var(--lemon)}
.advice h3{font-size:17px;margin-bottom:4px}
.advice p{color:var(--text);font-size:16px}
.advice+.advice{margin-top:10px}
.advice .pctline{color:var(--muted);font-size:14px;margin-bottom:6px}
.advice.good{border-left-color:var(--ok)}

.trows{display:flex;flex-direction:column}
.trow{display:grid;grid-template-columns:1fr auto;gap:4px 12px;padding:12px 0;border-bottom:1px solid var(--line);align-items:center}
.trow:last-child{border-bottom:0}
.trow .nm{font-size:15px;color:var(--ink)}
.trow .vl{font-size:15px;font-weight:700;font-variant-numeric:tabular-nums}
.trow .bar{grid-column:1/-1;height:6px;border-radius:99px;background:var(--azure);overflow:hidden}
.trow .bar i{display:block;height:100%;border-radius:99px}
.c1{color:var(--ko)}.c2{color:#A07800}.c3{color:var(--cobalt)}.c4{color:var(--ok)}
:root[data-theme="dark"] .c2{color:var(--lemon)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .c2{color:var(--lemon)}}
.b1{background:var(--ko)}.b2{background:var(--lemon)}.b3{background:var(--cobalt-2)}.b4{background:var(--ok)}

/* ---------- Review & error cards ---------- */
.filters{display:flex;gap:8px;overflow-x:auto;padding:2px 0 4px;margin:0 -16px;padding-left:16px;padding-right:16px;scrollbar-width:none}
.filters::-webkit-scrollbar{display:none}
.chip{flex:none;padding:9px 14px;border-radius:99px;border:1.5px solid var(--line);background:var(--surface);font-size:15px;color:var(--ink);white-space:nowrap}
.chip[aria-pressed="true"]{background:var(--cobalt);border-color:var(--cobalt);color:#fff}
:root[data-theme="dark"] .chip[aria-pressed="true"]{color:#0B1430}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .chip[aria-pressed="true"]{color:#0B1430}}
.rv{margin-top:12px}
.rv .head{display:flex;justify-content:space-between;gap:10px;font-size:13px;color:var(--muted);margin-bottom:8px}
.rv .head b{color:var(--ko)}
.rv .head b.ok{color:var(--ok)}
.rv .qt{font-weight:700;color:var(--ink);font-size:17px;margin-bottom:12px}
.rv .opts{gap:8px}
.rv .opt{font-size:16px;padding:11px 12px;min-height:0;cursor:default}
.rv .opt .L{width:26px;height:26px;font-size:14px}
.rv .acts{display:flex;gap:8px;margin-top:12px}
.rv .acts button{font-size:14px;padding:8px 12px;border-radius:10px;border:1.5px solid var(--line);color:var(--ink)}
.select{width:100%;min-height:50px;border-radius:var(--radius-m);border:1.5px solid var(--line);background:var(--surface);color:var(--ink);font:inherit;padding:0 14px;-webkit-appearance:none;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='9' viewBox='0 0 14 9'%3E%3Cpath d='M1 1l6 6 6-6' fill='none' stroke='%235A6684' stroke-width='2'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center}
.empty{text-align:center;padding:36px 16px;color:var(--muted)}
.empty strong{display:block;color:var(--ink);font-size:18px;margin-bottom:6px}
.more{margin:16px 0}

/* ---------- Stats & settings ---------- */
.kpis{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.kpi{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-m);padding:14px}
.kpi b{display:block;font-size:28px;color:var(--ink);font-variant-numeric:tabular-nums;line-height:1.1}
.kpi span{font-size:14px;color:var(--muted)}
.setrow{display:flex;justify-content:space-between;align-items:center;gap:14px;padding:14px 0;border-bottom:1px solid var(--line)}
.setrow:last-child{border-bottom:0}
.setrow div{flex:1}
.setrow strong{display:block;color:var(--ink)}
.setrow span{font-size:14px;color:var(--muted)}
.switch{flex:none;width:52px;height:32px;border-radius:99px;background:var(--line);position:relative;transition:background-color .15s}
.switch::after{content:"";position:absolute;top:3px;left:3px;width:26px;height:26px;border-radius:50%;background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.25);transition:transform .15s}
.switch[aria-checked="true"]{background:var(--ok)}
.switch[aria-checked="true"]::after{transform:translateX(20px)}
.seg{display:flex;background:var(--azure);border-radius:12px;padding:3px;flex:none}
.seg button{padding:7px 12px;border-radius:9px;font-size:14px;color:var(--ink)}
.seg button[aria-pressed="true"]{background:var(--surface);font-weight:700;box-shadow:0 1px 3px rgba(0,0,0,.12)}
.note{font-size:14px;color:var(--muted);margin-top:10px}
.foot{color:var(--muted);font-size:13px;text-align:center;margin:28px 0 8px}

.toast{position:fixed;left:50%;transform:translateX(-50%);bottom:calc(96px + var(--safe-b));z-index:60;background:var(--ink);color:var(--bg);padding:12px 18px;border-radius:12px;font-size:15px;max-width:calc(100% - 32px);box-shadow:var(--shadow)}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}