/* ═════════ kartka z rozwiązaniem ═════════ */
:root { --pen2: var(--red); --pen3: #0f766e; --sq: var(--grid); --paperbg: var(--sheet); }
:root[data-theme="dark"] { --pen3: #5eead4; }
#sol { margin-top: 22px; }
.paper {
  position: relative; border-radius: 20px;
  background-color: var(--paperbg);
  background-image: linear-gradient(var(--sq) 1px, transparent 1px), linear-gradient(90deg, var(--sq) 1px, transparent 1px);
  background-size: 22px 22px; background-position: -1px -1px;
  box-shadow: 0 0 0 1px var(--line), 0 12px 32px -18px rgba(0, 0, 0, .18);
  color: var(--pen); font-family: Kalam, cursive; font-size: 21px; line-height: 1.75;
  padding: 0 28px 26px 64px;
}
.paper::before { content: ""; position: absolute; left: 44px; top: 0; bottom: 0; width: 1.5px; background: rgba(214, 74, 74, .45); }
.pbar {
  position: sticky; top: 0; z-index: 2; display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap;
  margin: 0 -28px 6px -64px; padding: 12px 18px 12px 64px; border-radius: 20px 20px 0 0;
  background: var(--paperbg); border-bottom: 1px solid var(--line);
  font-family: var(--sans); font-size: 13px; line-height: 1.4; color: var(--ink);
}
.ptitle { font-weight: 600; }
.ptask { display: block; font-weight: 400; font-size: 15px; color: var(--ink); max-width: 46ch; }
.pctl { display: flex; gap: 6px; flex-wrap: wrap; }
.pctl button { border: 0; background: var(--soft); border-radius: 999px; padding: 6px 12px; font-size: 12.5px; cursor: pointer; font-weight: 500; }
.pctl button:hover { background: var(--line); }
.psteps { list-style: none; margin: 0; padding: 0; }
.ps { display: grid; grid-template-columns: 30px 1fr; padding: 8px 0 4px; }
.pn { font-weight: 700; display: inline-block; }
.pb b { font-weight: 700; text-decoration: underline; text-decoration-color: var(--pen2); text-underline-offset: 4px; }
.pfig { margin: 10px 0 4px; }
.pans { margin-top: 14px; padding-left: 30px; font-weight: 700; }
.pans .box { display: inline-block; border: 2px solid var(--pen2); border-radius: 6px; padding: 0 10px; margin-left: 6px; color: var(--pen); font-weight: 400; }
.paper .katex { display: inline-block; font-size: 1.02em; }
.paper .katex .mathnormal, .paper .katex .mord, .paper .katex .mbin, .paper .katex .mrel,
.paper .katex .mpunct, .paper .katex .mop, .paper .katex .mopen, .paper .katex .mclose {
  font-family: Kalam, KaTeX_Main, cursive; font-style: normal;
}
.paper .katex .delimsizing, .paper .katex .delimsizing * { font-family: KaTeX_Size1, KaTeX_Main; }
.paper.compact { font-size: 18px; padding: 0 20px 20px 52px; }
.paper.compact::before { left: 34px; }
.paper.compact .pbar { margin: 0 -20px 6px -52px; padding-left: 52px; }

/* wykresy na kartce */
.plot { display: block; max-width: 100%; height: auto; overflow: visible; font-family: Kalam, cursive; }
.plot .grid { stroke: var(--sq); stroke-width: 1; }
.plot .ax { stroke: var(--ink); stroke-width: 1.3; fill: none; opacity: .75; }
.plot .axl, .plot .tick { fill: var(--ink); opacity: .7; font-size: 12px; font-family: var(--sans); }
.plot .axl { font-style: italic; font-size: 14px; }
.plot .ink { stroke: var(--pen); stroke-width: 2.4; fill: none; stroke-linecap: round; stroke-linejoin: round; }
.plot .ink.alt { stroke: var(--pen3); }
.plot .ink2 { stroke: var(--pen2); stroke-width: 4; fill: none; stroke-linecap: round; opacity: .85; }
.plot .help { stroke: var(--pen); stroke-width: 1.4; stroke-dasharray: 5 4; fill: none; opacity: .75; }
.plot .thin { stroke: var(--pen); stroke-width: 1.3; fill: none; }
.plot .hl { stroke: var(--pen2); stroke-width: 5; stroke-linecap: round; opacity: .8; }
.plot .pt { fill: var(--pen); }
.plot .pt.alt { fill: var(--pen2); }
.plot .end { fill: var(--pen2); stroke: var(--pen2); stroke-width: 2; }
.plot .end.hollow, .plot .pt.hollow { fill: var(--paperbg); }
.plot .lbl { fill: var(--pen); font-size: 17px; }
.plot .lbl.sm { font-size: 14px; }
.paper .fig { color: var(--pen); font-family: Kalam, cursive; margin: 10px 0 0; }

/* ═════════ radar i profil ═════════ */
.show { background: var(--soft); border-radius: 26px; padding: 26px; margin-top: 8px; }
.show-head { display: flex; justify-content: space-between; font-size: 13px; font-weight: 600; margin-bottom: 6px; gap: 10px; flex-wrap: wrap; }
.muted { color: var(--muted); font-weight: 400; }
.show-next { margin-top: 14px; padding: 14px 16px; background: var(--bg); border-radius: 14px; font-size: 14px; color: var(--muted); }
.show-next b { color: var(--ink); }
.profile { display: grid; grid-template-columns: 1.25fr 1fr; gap: 18px; align-items: center; }
.radar-wrap { position: relative; }
.radar { width: 100%; height: auto; display: block; overflow: visible; }
.radar .rg { fill: none; stroke: #dedee3; stroke-width: 1; }
.radar .rg.thr { stroke: var(--bad); stroke-dasharray: 4 4; opacity: .6; }
.radar .thr-l { font-size: 10.5px; fill: var(--bad); }
.radar .poly { fill: var(--ink); fill-opacity: .08; stroke: var(--ink); stroke-width: 2; stroke-linejoin: round; animation: grow .9s cubic-bezier(.2, .8, .2, 1); transform-box: view-box; }
@keyframes grow { from { transform: scale(.15); opacity: 0; } }
.radar .dot { fill: var(--ink); stroke: var(--soft); stroke-width: 2; }
.radar .dot.open { fill: var(--soft); stroke: var(--ink); stroke-width: 1.5; }
.radar .hit { fill: transparent; }
.radar .rl { font-size: 12.5px; fill: var(--muted); }
.radar .rp { font-size: 14px; font-weight: 700; fill: var(--ink); }
.radar .rv:hover .rl { fill: var(--ink); }
.tip { position: absolute; pointer-events: none; background: var(--ink); color: var(--bg); font-size: 12.5px; padding: 6px 10px; border-radius: 8px; white-space: nowrap; z-index: 3; }
.pside .est { padding-bottom: 14px; border-bottom: 1px solid var(--line); margin-bottom: 10px; }
.pside .est .n { font-size: 52px; font-weight: 700; letter-spacing: -.04em; line-height: 1; }
.pside .est span { color: var(--muted); font-size: 13px; }
.dzlist { display: grid; gap: 2px; }
.dzr { display: grid; grid-template-columns: 1fr 70px 40px; gap: 10px; align-items: center; font-size: 13px; padding: 4px 0; }
.dzr b { text-align: right; font-variant-numeric: tabular-nums; }
.center { text-align: center; }

/* ═════════ landing ═════════ */
.pill { display: inline-block; background: var(--soft); border-radius: 999px; padding: 6px 14px; font-size: 13px; color: var(--muted); margin-bottom: 22px; }
main:has(.feat) { max-width: 1000px; }
.feat { display: grid; grid-template-columns: 1fr 1.25fr; gap: 40px; align-items: center; margin-top: 104px; }
.feat.rev .ftxt { order: 2; }
#demo { align-items: start; }
#demo .ftxt { position: sticky; top: 90px; padding-top: 24px; }
.feat h2 { margin: 6px 0 12px; font-size: 32px; line-height: 1.12; }
.feat p { color: var(--muted); font-size: 16px; margin: 0 0 18px; }
.tag { font-size: 13px; font-weight: 600; color: var(--muted); }
.fcard { background: var(--soft); border-radius: 22px; padding: 24px; }
.fdemo { min-height: 380px; }
.fcard .opt { cursor: default; }
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.stats div { background: var(--bg); border-radius: 14px; padding: 18px 14px; }
.stats b { display: block; font-size: 30px; letter-spacing: -.03em; }
.stats span { color: var(--muted); font-size: 13px; }
.cta { text-align: center; margin: 120px 0 30px; }
.cta h2 { margin-bottom: 22px; }
.vsub { font-weight: 500; color: var(--muted); font-size: 15px; }

@media (max-width: 760px) {
  .profile, .feat { grid-template-columns: 1fr; }
  .feat.rev .ftxt { order: 0; }
  #demo .ftxt { position: static; padding-top: 0; }
  .feat { margin-top: 64px; gap: 18px; }
  .show { padding: 16px; border-radius: 20px; }
  .paper { font-size: 18px; padding: 0 14px 20px 40px; }
  .paper::before { left: 26px; }
  .pbar { margin: 0 -14px 6px -40px; padding-left: 16px; }
  .paper.compact { padding: 0 14px 20px 40px; }
  .paper.compact::before { left: 26px; }
  .paper.compact .pbar { margin: 0 -14px 6px -40px; padding-left: 16px; }
  .stats { grid-template-columns: 1fr; }
  .radar .rl { font-size: 15px; }
  .radar .rp { font-size: 17px; }
}

/* ═════════ próbna matura ═════════ */
.choice { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 8px 0 18px; }
.ch { display: flex; gap: 12px; align-items: flex-start; background: var(--soft); border-radius: 18px; padding: 18px; cursor: pointer; border: 1px solid transparent; }
.ch:has(input:checked) { border-color: var(--ink); background: var(--bg); }
.ch input { margin-top: 4px; accent-color: var(--ink); }
.ch b { display: block; }
.rules { color: var(--muted); font-size: 14px; padding-left: 18px; margin: 0 0 8px; }
.rules li { margin: 4px 0; }
.exbar { position: sticky; top: 0; z-index: 5; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 10px;
  background: var(--bg); padding: 10px 0; border-bottom: 1px solid var(--line); font-size: 13px; color: var(--muted); }
.exbar b { color: var(--ink); }
.exbar .btn { justify-self: end; }
.clock { font-size: 22px; font-weight: 700; color: var(--ink); font-variant-numeric: tabular-nums; letter-spacing: -.02em; }
.clock.low { color: var(--bad); }
.exnav { display: flex; flex-wrap: wrap; gap: 6px; margin: 14px 0 6px; }
.exnav button { width: 34px; height: 34px; border-radius: 10px; border: 1px solid var(--line); background: var(--bg); cursor: pointer; font-size: 13px; font-weight: 500; }
.exnav button.done { background: var(--soft); border-color: var(--soft); color: var(--ink); }
.exnav button.cur { border-color: var(--ink); box-shadow: inset 0 0 0 1px var(--ink); }
.est .of { font-size: 28px; color: var(--muted); letter-spacing: -.02em; }
.pass { margin-top: 10px; font-weight: 600; font-size: 14px; }
.pass.ok { color: var(--ok); }
.pass.bad { color: var(--bad); }
.xrow { border-bottom: 1px solid var(--line); }
.xhead { width: 100%; display: grid; grid-template-columns: 26px 1fr auto; gap: 12px; align-items: center; text-align: left; background: none; border: 0; padding: 13px 0; cursor: pointer; }
.xhead .dz { color: var(--muted); font-size: 13px; }
.xmark { width: 24px; height: 24px; border-radius: 50%; display: grid; place-items: center; font-size: 12px; font-weight: 700; background: var(--soft); color: var(--muted); }
.xmark.ok { background: var(--ok); color: #fff; }
.xmark.bad { background: var(--bad); color: #fff; }
.xbody { padding: 4px 0 22px; }
.xsol { margin-top: 16px; }
@media (max-width: 760px) {
  .choice { grid-template-columns: 1fr; }
  .exbar { grid-template-columns: 1fr auto; }
  .exbar > span:first-child { grid-column: 1 / -1; }
  .exbar .clock { justify-self: start; }
}