/* Fizyka — styl „mikrocement”: jeden materiał, jedno światło (z lewej u góry), jedna kreska ikon. */

@font-face { font-family: 'Atkinson'; font-weight: 400; font-display: swap; src: url(fonts/atkinson-hyperlegible-latin-400-normal.woff2) format('woff2');
  unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD; }
@font-face { font-family: 'Atkinson'; font-weight: 400; font-display: swap; src: url(fonts/atkinson-hyperlegible-latin-ext-400-normal.woff2) format('woff2');
  unicode-range: U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF; }
@font-face { font-family: 'Atkinson'; font-weight: 700; font-display: swap; src: url(fonts/atkinson-hyperlegible-latin-700-normal.woff2) format('woff2');
  unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD; }
@font-face { font-family: 'Atkinson'; font-weight: 700; font-display: swap; src: url(fonts/atkinson-hyperlegible-latin-ext-700-normal.woff2) format('woff2');
  unicode-range: U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF; }
@font-face { font-family: 'Fraunces'; font-weight: 600; font-display: swap; src: url(fonts/fraunces-latin-600-normal.woff2) format('woff2');
  unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD; }
@font-face { font-family: 'Fraunces'; font-weight: 600; font-display: swap; src: url(fonts/fraunces-latin-ext-600-normal.woff2) format('woff2');
  unicode-range: U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF; }

:root {
  --bg: #d6d0c7;
  --slab: #e5e0d8;
  --slab-2: #dcd6cd;
  --ink: #2e2b27;
  --ink-2: #625b52;
  --line: rgba(46, 43, 39, .13);
  --cold: #587684;
  --hot: #bf5229;
  --ok: #557546;
  --ok-bg: rgba(85, 117, 70, .12);
  --bad: #b0462a;
  --bad-bg: rgba(176, 70, 42, .10);
  --btn: #3a3632;
  --btn-ink: #f1ece4;
  --hi: rgba(255, 255, 255, .72);
  --sh: rgba(70, 55, 38, .30);
  --raise: 10px 12px 26px -12px var(--sh), -6px -6px 16px -9px var(--hi), inset 1px 1px 0 rgba(255, 255, 255, .55), inset -1px -1px 0 rgba(70, 55, 38, .07);
  --carve: inset 3px 3px 7px -2px rgba(70, 55, 38, .26), inset -2px -2px 5px -2px var(--hi);
  --grain-a: .07;
  --r: 16px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #2a2825; --slab: #35322e; --slab-2: #2f2c29; --ink: #ece6dc; --ink-2: #b4ab9f; --line: rgba(236, 230, 220, .12);
    --cold: #86a6b4; --hot: #e07a4e; --ok: #94b884; --ok-bg: rgba(148, 184, 132, .13); --bad: #e58a6a; --bad-bg: rgba(229, 138, 106, .12);
    --btn: #e6dfd4; --btn-ink: #2a2825; --hi: rgba(255, 255, 255, .06); --sh: rgba(0, 0, 0, .55);
    --raise: 10px 12px 26px -12px var(--sh), -5px -5px 14px -9px rgba(255, 255, 255, .07), inset 1px 1px 0 rgba(255, 255, 255, .06), inset -1px -1px 0 rgba(0, 0, 0, .25);
    --carve: inset 3px 3px 8px -2px rgba(0, 0, 0, .55), inset -2px -2px 5px -2px rgba(255, 255, 255, .05);
    --grain-a: .12;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; min-height: 100vh; color: var(--ink); background-color: var(--bg);
  /* mikrocement: drobne ziarno + duże, miękkie przecierki + światło z lewej u góry */
  background-image:
    radial-gradient(ellipse 120% 70% at 0% 0%, var(--hi), transparent 60%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='900' height='900'%3E%3Cfilter id='m'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.0045' numOctaves='4' seed='7'/%3E%3CfeColorMatrix values='0 0 0 0 .42 0 0 0 0 .38 0 0 0 0 .33 0 0 0 .55 -.18'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23m)'/%3E%3C/svg%3E"),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 .3 0 0 0 0 .27 0 0 0 0 .23 0 0 0 .14 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-repeat: no-repeat, repeat, repeat;
  background-size: 100% 900px, auto, auto;
  font: 400 18px/1.55 'Atkinson', system-ui, -apple-system, 'Segoe UI', sans-serif;
  padding: max(16px, env(safe-area-inset-top)) max(16px, env(safe-area-inset-right)) calc(32px + env(safe-area-inset-bottom)) max(16px, env(safe-area-inset-left));
}
main { max-width: 640px; margin: 0 auto; }
h1, h2, h3, .num { font-family: 'Fraunces', Georgia, serif; font-weight: 600; letter-spacing: -.01em; line-height: 1.15; }
h1 { font-size: 30px; margin: 8px 0 4px; }
h2 { font-size: 23px; margin: 0 0 8px; }
h3 { font-size: 19px; margin: 22px 0 8px; }
p { margin: 0 0 12px; }
a { color: inherit; }
b { font-weight: 700; }
sub { font-size: .72em; }
.ladowanie { text-align: center; margin-top: 30vh; color: var(--ink-2); }
.drobne, .lead { color: var(--ink-2); font-size: 16px; }

svg.ik { width: 22px; height: 22px; flex: none; fill: none; stroke: currentColor; stroke-width: 1.75; stroke-linecap: round; stroke-linejoin: round; }

/* ---------- płyty ---------- */
.slab { background: var(--slab); border-radius: var(--r); box-shadow: var(--raise); padding: 18px; margin: 0 0 16px; position: relative; }
.slab.cicha { background: var(--slab-2); }

.pasek { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin: 0 0 14px; }
.wroc { display: inline-flex; align-items: center; gap: 6px; text-decoration: none; color: var(--ink-2); font-size: 16px; padding: 10px 6px 10px 0; min-height: 44px; }
.wroc:hover { color: var(--ink); }
.malyprzycisk { background: none; border: 0; color: var(--ink-2); font: inherit; font-size: 16px; display: inline-flex; align-items: center; gap: 6px; padding: 10px 0 10px 6px; min-height: 44px; cursor: pointer; }

/* ---------- przyciski ---------- */
.btn {
  appearance: none; border: 0; cursor: pointer; font: 700 18px/1.2 'Atkinson', system-ui, sans-serif;
  background: var(--btn); color: var(--btn-ink); border-radius: 12px; min-height: 54px; padding: 14px 20px;
  display: inline-flex; align-items: center; justify-content: center; gap: 10px; text-decoration: none;
  box-shadow: 6px 8px 16px -8px var(--sh), inset 1px 1px 0 rgba(255, 255, 255, .12);
  transition: transform .08s ease, box-shadow .08s ease;
}
.btn:active { transform: translate(1px, 2px); box-shadow: 2px 3px 8px -6px var(--sh); }
.btn[disabled] { opacity: .45; cursor: default; transform: none; }
.btn.drugi { background: var(--slab-2); color: var(--ink); box-shadow: var(--carve); }
.btn.pelny { width: 100%; }
.rzad { display: flex; gap: 10px; flex-wrap: wrap; }
.rzad > .btn { flex: 1 1 140px; }
:focus-visible { outline: 3px solid var(--hot); outline-offset: 3px; border-radius: 6px; }

/* ---------- termometr ---------- */
.termo { display: flex; align-items: center; gap: 0; margin: 6px 0 2px; }
.termo .banka { width: 24px; height: 24px; border-radius: 50%; flex: none; box-shadow: var(--carve); background: var(--slab-2); position: relative; z-index: 1; }
.termo .banka::after { content: ''; position: absolute; inset: 5px; border-radius: 50%; background: var(--cold); }
.termo.goraco .banka::after { background: var(--hot); }
.termo .rura { flex: 1; height: 12px; margin-left: -4px; border-radius: 0 8px 8px 0; box-shadow: var(--carve); background: var(--slab-2); overflow: hidden; padding: 3px 3px 3px 4px; }
.termo .rura i { display: block; height: 100%; width: 0; border-radius: 0 5px 5px 0; background: linear-gradient(90deg, var(--cold), var(--hot)); transition: width .5s ease; }
.termo-opis { display: flex; justify-content: space-between; font-size: 14px; color: var(--ink-2); }

/* ---------- logowanie ---------- */
.logo { display: flex; align-items: center; gap: 12px; margin: 10vh 0 18px; }
.logo svg { width: 46px; height: 46px; }
.pole { display: block; margin: 0 0 14px; }
.pole span { display: block; font-size: 15px; color: var(--ink-2); margin: 0 0 6px; }
.pole input, .wejscie input {
  width: 100%; font: 400 20px/1.2 'Atkinson', system-ui, sans-serif; color: var(--ink);
  background: var(--slab-2); border: 0; border-radius: 12px; padding: 14px 14px; min-height: 54px; box-shadow: var(--carve);
}
.pole input:focus, .wejscie input:focus { outline: 3px solid var(--cold); outline-offset: 2px; }
.blad { color: var(--bad); font-weight: 700; min-height: 1.5em; }

/* ---------- działy ---------- */
.dzial { display: grid; grid-template-columns: 52px 1fr; gap: 4px 14px; }
.dzial .num { font-size: 40px; line-height: 1; color: var(--ink-2); opacity: .55; padding-top: 2px; }
.dzial.zrobiony .num { color: var(--ok); opacity: 1; }
.dzial h2 { font-size: 21px; margin: 0 0 2px; }
.dzial .lead { margin: 0 0 8px; }
.dzial .akcje { grid-column: 1 / -1; display: flex; gap: 10px; margin-top: 10px; }
.dzial .akcje .btn { flex: 1; min-height: 50px; font-size: 17px; }
.chip { display: inline-flex; align-items: center; gap: 5px; font-size: 14px; font-weight: 700; padding: 3px 10px 3px 8px; border-radius: 999px; background: var(--slab-2); box-shadow: var(--carve); color: var(--ink-2); }
.chip.ok { color: var(--ok); }
.chip svg.ik { width: 16px; height: 16px; }
.zablokowany { color: var(--ink-2); font-size: 15px; display: flex; align-items: center; gap: 8px; grid-column: 1 / -1; margin-top: 8px; }

.kafle { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 0 0 16px; }
.kafel { display: flex; flex-direction: column; gap: 6px; text-decoration: none; color: var(--ink); background: var(--slab); border-radius: var(--r); box-shadow: var(--raise); padding: 16px; min-height: 104px; }
.kafel b { font-size: 17px; }
.kafel small { color: var(--ink-2); font-size: 14px; }
.kafel.szeroki { grid-column: 1 / -1; }
.kafel:active { transform: translate(1px, 2px); }

/* ---------- lekcja ---------- */
.lekcja h2 { margin-top: 2px; }
.wzor { background: var(--slab-2); box-shadow: var(--carve); border-radius: 12px; padding: 12px 16px; margin: 0 0 12px; font-weight: 700; font-size: 20px; line-height: 1.4; overflow-wrap: anywhere; }
.wzor.big { font-size: 26px; font-family: 'Fraunces', Georgia, serif; text-align: center; }
.wzor span { display: block; margin-top: 2px; font: 400 14px/1.3 'Atkinson', system-ui, sans-serif; color: var(--ink-2); }
.ramka { border-left: 4px solid var(--hot); padding: 4px 0 4px 12px; }
ul, ol { padding-left: 22px; margin: 0 0 12px; }
li { margin: 0 0 4px; }
ul.dane { list-style: none; padding: 0; }
.tab { width: 100%; border-collapse: collapse; margin: 0 0 12px; font-size: 15px; }
.tab th, .tab td { text-align: left; padding: 7px 5px; border-bottom: 1px solid var(--line); overflow-wrap: anywhere; hyphens: auto; }
.tab th { font-size: 14px; color: var(--ink-2); }
.tab td:last-child { text-align: right; }
.pob { color: var(--hot); font-weight: 700; }
.odd { color: var(--cold); font-weight: 700; }

/* ---------- wykres ---------- */
.wykres { display: block; width: 100%; max-width: 420px; height: auto; margin: 12px auto; }
.wk-o { stroke: var(--ink-2); stroke-width: 1.5; }
.wk-g { stroke: var(--line); stroke-width: 1; stroke-dasharray: 3 4; }
.wk-l { stroke: var(--ink); stroke-width: 2.5; stroke-linecap: round; }
.wk-on { stroke: var(--hot); stroke-width: 5; stroke-linecap: round; }
.wk-p { fill: var(--ink); }
.wk-t { fill: var(--ink); font: 700 13px 'Atkinson', system-ui, sans-serif; }
.wk-s { fill: var(--ink-2); font: 400 11px 'Atkinson', system-ui, sans-serif; }

/* ---------- zadanie ---------- */
.pytanie { font-size: 19px; }
.dane-c { display: block; margin-top: 8px; font-size: 16px; color: var(--ink-2); }
.opcje { display: grid; gap: 10px; margin: 16px 0 0; }
.opcja {
  appearance: none; text-align: left; font: 400 18px/1.35 'Atkinson', system-ui, sans-serif; color: var(--ink);
  background: var(--slab); border: 2px solid transparent; border-radius: 12px; padding: 14px 16px; min-height: 56px; cursor: pointer;
  box-shadow: 6px 8px 16px -10px var(--sh), -4px -4px 10px -8px var(--hi), inset 1px 1px 0 rgba(255, 255, 255, .45);
  display: flex; gap: 12px; align-items: flex-start;
}
.opcja .lit { font-family: 'Fraunces', Georgia, serif; font-weight: 600; color: var(--ink-2); min-width: 1.1em; }
.opcja:active:not([disabled]) { transform: translate(1px, 2px); }
.opcja[disabled] { cursor: default; }
.opcja.dobra { border-color: var(--ok); background: var(--ok-bg); }
.opcja.zla { border-color: var(--bad); background: var(--bad-bg); }
.opcja.wygaszona { opacity: .55; }

.wejscie { display: flex; gap: 10px; align-items: stretch; margin: 16px 0 12px; }
.wejscie input { flex: 1; min-width: 0; font-size: 24px; font-weight: 700; }
.wejscie .jedn { align-self: center; font-weight: 700; color: var(--ink-2); white-space: nowrap; max-width: 40%; }
.wejscie input.ok { outline: 3px solid var(--ok); }
.wejscie input.zle { outline: 3px solid var(--bad); }

.wskazowka { background: var(--slab-2); box-shadow: var(--carve); border-radius: 12px; padding: 10px 14px; margin: 0 0 12px; display: flex; gap: 10px; }
.uwaga { color: var(--hot); font-weight: 700; margin: 0 0 12px; }

.fb { border-radius: 12px; padding: 14px 16px; margin: 14px 0 14px; border-left: 5px solid; }
.fb.ok { border-color: var(--ok); background: var(--ok-bg); }
.fb.zle { border-color: var(--bad); background: var(--bad-bg); }
.fb h3 { margin: 0 0 6px; display: flex; align-items: center; gap: 8px; }
.fb.ok h3 { color: var(--ok); }
.fb.zle h3 { color: var(--bad); }
.kroki-rozw { margin: 8px 0 0; padding-left: 20px; }
.kroki-rozw li { margin: 0 0 6px; }

.licznik { font-size: 14px; color: var(--ink-2); }
.wielki { font-family: 'Fraunces', Georgia, serif; font-size: 56px; line-height: 1; margin: 6px 0; }

/* ---------- powrót do lekcji (wymuszony) ---------- */
.stop { border: 2px dashed var(--hot); }
.stop .naglowek { display: flex; gap: 10px; align-items: center; color: var(--hot); font-weight: 700; margin: 0 0 8px; }

/* ---------- rodzic ---------- */
.uczen h2 { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; }
.uczen h2 small { font: 400 14px 'Atkinson', system-ui, sans-serif; color: var(--ink-2); }
.mini { display: grid; grid-template-columns: 1fr auto; gap: 2px 12px; align-items: center; font-size: 15px; margin: 8px 0; }
.mini > span:nth-child(even) { text-align: right; white-space: nowrap; }
.mini .rura { margin-bottom: 10px; }
.mini .licznik { margin-bottom: 10px; }
.mini .rura { height: 10px; border-radius: 6px; box-shadow: var(--carve); background: var(--slab-2); overflow: hidden; padding: 2px; }
.mini .rura i { display: block; height: 100%; width: 0; border-radius: 4px; background: linear-gradient(90deg, var(--cold), var(--hot)); }
.lista-bledow { list-style: none; padding: 0; font-size: 15px; }
.lista-bledow li { border-bottom: 1px solid var(--line); padding: 8px 0; }
.lista-bledow small { color: var(--ink-2); }
.dni { display: flex; gap: 6px; align-items: flex-end; height: 70px; margin: 8px 0 4px; }
.dni div { flex: 1; display: flex; flex-direction: column; justify-content: flex-end; align-items: center; gap: 2px; font-size: 11px; color: var(--ink-2); height: 100%; }
.dni i { display: block; width: 100%; border-radius: 4px 4px 0 0; background: var(--cold); min-height: 2px; }

@media (min-width: 560px) {
  body { font-size: 19px; }
  h1 { font-size: 36px; }
  .slab { padding: 22px 24px; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}
.dni div { max-width: 48px; }