/*
 * EzyMat / Notebook Tabs
 *
 * Globalna GEOMETRIA tomu: masthead, oprawa, indeks oraz podstawowe prymitywy
 * stron. Kolor należy do motyw.css (kiedyś stał tu ciemny stół pod kartką -
 * motyw jasny go zdjął), geometria scen do margines-*, finalny materiał
 * i napięcie do notebook-aura.css.
 */

/* KOLORU tu nie ma - definiuje go motyw.css (laduje sie ostatni i mapuje
   stare nazwy --notebook-* na tokeny semantyczne). Zostaja kroje i siatka,
   ktorych motyw nie dotyka. */
:root {
  --display: "Helvetica Neue", Helvetica, Arial, sans-serif;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --page-width: 1120px;
  --volume-width: 1230px;
}

html {
  min-width: 320px;
  background: var(--notebook-night);
}

/* Bez wlasnego tla i koloru: powloke strony ustawia motyw.css. Wczesniej byl
   tu ciemny gradient "biurka" plus dwie warstwy atmosfery (body::before i
   ::after) - kurz i linie o kryciu 0,6-2,5%, dobrane pod prawie czarna plyte.
   Motyw jasny zdjal ta plyte, a warstwy zostaly; przy okazji przejscia na
   tokeny ich prawie przezroczysta biel stala sie PELNYM kolorem powierzchni,
   wiec zamiast kurzu malowaly nieprzezroczyste pasy i prazki co 4 px. */
body {
  min-height: 100vh;
  margin: 0;
  font-family: var(--display);
}

::selection {
  background: var(--notebook-lime);
  color: var(--notebook-ink);
}

:focus-visible {
  outline: 2px solid var(--notebook-lime);
  outline-offset: 3px;
}

.skip-link {
  border-color: var(--notebook-paper);
  background: var(--notebook-ink);
  color: var(--notebook-paper);
}

/* Masthead pozostaje poza bryłą dokumentu. */
.site-header {
  position: relative;
  top: auto;
  z-index: 50;
  display: flex;
  width: min(var(--volume-width), calc(100% - 64px));
  min-height: 92px;
  margin: 0 auto;
  padding: 27px 0 15px;
  align-items: flex-start;
  justify-content: space-between;
  gap: 32px;
  border: 0;
  background: transparent;
  /* Tekst na POWLOCE strony, nie na wypelnieniu - patrz .brand nizej.
     `--notebook-paper` znaczy dzis "kolor powierzchni". */
  color: var(--tekst);
  box-shadow: none;
  backdrop-filter: none;
}

.brand-lockup {
  display: grid;
  gap: 14px;
  min-width: 0;
}

.brand {
  display: inline-flex;
  width: max-content;
  gap: 13px;
  align-items: center;
  /* Tekst na POWLOCE strony, nie na wypelnieniu: musi isc za --tekst.
     `--notebook-paper` znaczy dzis "kolor powierzchni", wiec dawal marke
     niewidoczna w obu motywach (jasna na jasnym, ciemna na ciemnym). */
  color: var(--tekst);
  font-size: .88rem;
  font-weight: 760;
  letter-spacing: .055em;
  text-decoration: none;
  text-transform: uppercase;
}

.brand-mark {
  position: relative;
  display: inline-grid;
  width: 23px;
  height: 23px;
  place-items: center;
  border: 1px solid var(--powierzchnia);
  background: var(--notebook-paper);
  box-shadow: var(--cien-1);
}

.brand-mark::before,
.brand-mark::after {
  position: absolute;
  content: "";
}

.brand-mark::before {
  inset: 5px;
  border: 1px solid var(--linia-mocna);
}

.brand-mark::after,
.brand-mark i {
  top: -1px;
  right: -1px;
  width: 7px;
  height: 7px;
  background: var(--notebook-lime);
}

.brand-mark i {
  position: absolute;
}

.brand-claim {
  position: relative;
  width: max-content;
  max-width: 100%;
  margin: 0;
  padding-bottom: 12px;
  color: var(--tekst-cichy);
  font: .66rem/1.3 var(--mono);
  letter-spacing: .025em;
}

.brand-claim::after {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--notebook-lime);
  content: "";
}

.site-meta {
  display: flex;
  min-width: 0;
  padding-top: 5px;
  align-items: center;
  justify-content: flex-end;
  gap: 18px;
}

.site-tagline {
  margin: 0;
  color: var(--tekst-slaby);
  font: var(--pismo-mikro)/1.3 var(--mono);
  letter-spacing: .045em;
}

.logout-form {
  margin: 0;
}

.text-action {
  min-height: 36px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--tekst-cichy);
  font: 700 var(--pismo-mikro)/1 var(--mono);
  letter-spacing: .055em;
  text-transform: uppercase;
}

.text-action:hover {
  color: var(--tekst);
}

.text-action span {
  color: var(--tekst-slaby);
  font-weight: 400;
  text-transform: none;
}

/* Jedna scena tomu. Nawigacja jest dołączona do oprawy, nie do nagłówka. */
.volume-stage {
  position: relative;
  width: min(var(--volume-width), calc(100% - 64px));
  margin: 7px auto 0;
  padding-right: 82px;
}

.volume-caption {
  display: flex;
  min-height: 28px;
  margin: 0 14px 12px 22px;
  align-items: center;
  gap: 7px;
  color: var(--tekst-slaby);
  font: 700 var(--pismo-mikro)/1.35 var(--mono);
  letter-spacing: .055em;
  text-transform: uppercase;
}

.volume-caption::after {
  display: block;
  height: 1px;
  flex: 1 1 auto;
  margin-left: 12px;
  background: linear-gradient(90deg, var(--linia), transparent 88%);
  content: "";
}

.volume-caption span {
  color: var(--tekst-cichy);
}

.volume-stage::before {
  position: absolute;
  inset: 55px 64px -18px 9px;
  z-index: -2;
  border: 1px solid var(--linia);
  background:
    linear-gradient(90deg, var(--polysk), transparent 13%, transparent 84%, var(--przemycie)),
    var(--notebook-cover);
  box-shadow:
    0 1px 0 var(--polysk) inset,
    var(--cien-3);
  content: "";
}

.volume-stage::after {
  position: absolute;
  right: 72px;
  bottom: -24px;
  left: 20px;
  z-index: -3;
  height: 38px;
  background:
    linear-gradient(180deg, var(--notebook-cover-edge), #100c13 72%);
  box-shadow: 0 22px 44px rgba(0, 0, 0, .46);
  content: "";
  transform: skewX(-.7deg);
}

.page-shell {
  position: relative;
  width: 100%;
  margin: 0 0 86px;
}

.site-nav {
  position: absolute;
  top: 118px;
  right: 0;
  z-index: 12;
  display: flex;
  width: 96px;
  flex-direction: column;
  gap: 8px;
  align-items: flex-end;
  justify-content: flex-start;
}

.site-nav a,
.site-nav .staff-link {
  --tab-accent: var(--notebook-paper-edge);
  position: relative;
  display: inline-flex;
  width: 74px;
  min-height: 35px;
  align-items: center;
  justify-content: flex-start;
  padding: 0 9px 0 13px;
  border: 1px solid var(--linia-mocna);
  border-left: 0;
  border-radius: 0 1px 1px 0;
  background: var(--notebook-paper-soft);
  color: var(--tekst-cichy);
  box-shadow: var(--cien-1);
  font: 800 .5rem/1 var(--mono);
  letter-spacing: .055em;
  text-decoration: none;
  text-transform: uppercase;
  transform: translateX(-4px);
  transition: width 140ms ease, transform 140ms ease, color 140ms ease, background 140ms ease;
}

.site-nav a::before {
  position: absolute;
  top: -1px;
  bottom: -1px;
  left: 0;
  width: 4px;
  background: var(--tab-accent);
  content: "";
}

.site-nav a::after {
  display: none;
}

.site-nav a[data-tab-tone="lime"] {
  --tab-accent: var(--notebook-lime);
}

.site-nav a[data-tab-tone="violet"] {
  --tab-accent: var(--notebook-violet);
}

.site-nav a[data-tab-tone="cool"] {
  --tab-accent: var(--notebook-cool);
}

.site-nav a[data-tab-tone="paper"] {
  --tab-accent: var(--notebook-coral);
}

.site-nav a:hover,
.site-nav a:focus-visible {
  width: 84px;
  color: var(--notebook-ink);
  transform: translateX(0);
}

.site-nav a.is-active {
  width: 88px;
  background: var(--notebook-ink);
  color: var(--notebook-paper);
  transform: translateX(0);
}

.site-nav a.is-active::before {
  width: 5px;
}

.site-nav .staff-link {
  opacity: .72;
}

.site-footer {
  display: flex;
  width: min(var(--volume-width), calc(100% - 64px));
  margin: 0 auto;
  padding: 18px 82px 32px 0;
  justify-content: space-between;
  gap: 24px;
  border-top: 1px solid var(--linia);
  color: var(--tekst-slaby);
  font: var(--pismo-mikro)/1.4 var(--mono);
  letter-spacing: .06em;
  text-transform: uppercase;
}

/* Tekst operacyjny. */
.scene-kicker,
.field-label,
.workspace-state,
.problem-state {
  margin: 0;
  color: var(--notebook-violet-deep);
  font: 800 var(--pismo-mikro)/1.45 var(--mono);
  letter-spacing: .085em;
  text-transform: uppercase;
}

.breadcrumb {
  margin: 0 0 14px;
  color: var(--tekst-slaby);
  font: var(--pismo-mikro)/1.4 var(--mono);
  letter-spacing: .04em;
}

.breadcrumb a:hover {
  color: var(--tekst);
}

.breadcrumb strong {
  /* Limonka jest ISKRA, nie kolorem pisma: na papierze ma kontrast 1,4.
     Aktywny okruszek niesie pozycje, wiec musi byc czytelny. */
  color: var(--tekst);
}

.primary-action,
.secondary-action,
.register-link,
.material-group-action {
  border: 1px solid var(--linia-mocna);
  border-radius: 0;
  background: var(--notebook-ink);
  color: var(--notebook-paper);
  box-shadow: inset 0 -3px 0 var(--notebook-lime);
  font: 800 var(--pismo-mikro)/1 var(--mono);
  letter-spacing: .04em;
}

.primary-action:hover,
.primary-action:focus-visible,
.secondary-action:hover,
.register-link:hover,
.material-group-action:hover {
  background: #231b24;
  color: #fffaf0;
  filter: none;
  transform: translateY(-1px);
}

.secondary-action,
.register-link,
.material-group-action {
  background: transparent;
  color: var(--notebook-ink);
  box-shadow: inset 0 -1px 0 var(--notebook-ink);
}

.secondary-action:hover,
.register-link:hover,
.material-group-action:hover {
  background: var(--notebook-ink);
  color: var(--notebook-paper);
}

select,
input:not([type="checkbox"]):not([type="radio"]):not([type="hidden"]) {
  border-color: var(--linia-mocna);
  border-radius: 0;
  background: var(--powierzchnia);
  color: var(--notebook-ink);
}

/* Wspólna bryła stron. */
.start-stage,
.chapter-stage,
.problem-stage,
.archive-stage,
.auth-stage,
.tablica-scena,
.material-index,
.range-index,
.attempt-section,
.archive-index,
.tablice-archiwum,
.library-stage,
.sheet-stage,
.empty-state {
  position: relative;
  border-color: var(--linia-mocna);
  background-color: var(--notebook-paper);
  color: var(--notebook-ink);
  box-shadow: var(--page-depth);
}

.start-stage::after,
.chapter-stage::after,
.problem-stage::after,
.archive-stage::after,
.auth-stage::after,
.library-stage::after,
.empty-state::after {
  position: absolute;
  top: 6px;
  right: -7px;
  bottom: -7px;
  left: 7px;
  z-index: -1;
  border: 1px solid var(--linia-mocna);
  background: var(--notebook-paper-edge);
  content: "";
}

.start-stage,
.chapter-stage,
.problem-stage,
.archive-stage,
.auth-stage,
.tablica-scena {
  min-height: 600px;
}

.trace-meter,
.trace-meter-empty {
  height: 3px;
  background: rgba(24, 19, 25, .14);
}

.trace-meter::-webkit-meter-optimum-value,
.trace-meter::-webkit-meter-suboptimum-value,
.trace-meter::-webkit-meter-even-less-good-value,
.trace-meter::-moz-meter-bar {
  background: var(--notebook-violet);
}

.empty-state {
  max-width: none;
}

.start-stage,
.problem-stage {
  isolation: isolate;
}

.presence-vertex {
  background: var(--notebook-lime);
}

@media (max-width: 1080px) {
  .site-header,
  .volume-stage,
  .site-footer {
    width: min(var(--page-width), calc(100% - 36px));
  }

  .volume-stage {
    padding-right: 0;
  }

  .volume-stage::before {
    right: 0;
  }

  .volume-stage::after {
    right: 8px;
  }

  .volume-caption {
    margin-right: 0;
    margin-left: 8px;
  }

  .site-nav {
    position: sticky;
    top: 0;
    z-index: 45;
    width: 100%;
    margin: 0 0 12px;
    padding: 8px 0;
    flex-direction: row;
    gap: 6px;
    align-items: center;
    overflow-x: auto;
    background: rgba(13, 10, 15, .95);
    scrollbar-width: thin;
  }

  .site-nav a,
  .site-nav .staff-link {
    width: auto;
    min-width: max-content;
    min-height: 44px;
    padding: 0 13px;
    border-left: 1px solid var(--linia-mocna);
    transform: none;
  }

  .site-nav a::before {
    top: auto;
    right: -1px;
    bottom: 0;
    left: -1px;
    width: auto;
    height: 3px;
  }

  .site-nav a:hover,
  .site-nav a:focus-visible,
  .site-nav a.is-active {
    width: auto;
    transform: none;
  }

  .page-shell {
    margin-bottom: 64px;
  }

  .site-footer {
    padding-right: 0;
  }
}

@media (max-width: 620px) {
  .site-header {
    width: calc(100% - 28px);
    min-height: 70px;
    padding: 16px 0 9px;
  }

  .brand-lockup {
    gap: 8px;
  }

  .brand {
    font-size: .72rem;
  }

  .brand-mark {
    width: 20px;
    height: 20px;
  }

  .brand-claim {
    max-width: 22ch;
    padding-bottom: 8px;
    font-size: var(--pismo-mikro);
  }

  .site-meta {
    padding-top: 0;
  }

  .site-tagline {
    display: none;
  }

  .text-action span {
    display: none;
  }

  .volume-stage {
    width: calc(100% - 20px);
    margin-top: 2px;
  }

  .volume-stage::before {
    inset: 78px -3px -10px 4px;
  }

  .volume-stage::after {
    right: 2px;
    bottom: -14px;
    left: 10px;
    height: 24px;
  }

  .volume-caption {
    min-height: 22px;
    margin: 0 2px 7px;
    font-size: var(--pismo-mikro);
  }

  .volume-caption::after {
    margin-left: 6px;
  }

  .site-nav {
    margin-bottom: 9px;
    padding: 6px 0;
  }

  .site-nav a,
  .site-nav .staff-link {
    min-height: 44px;
    padding-inline: 11px;
    font-size: var(--pismo-mikro);
  }

  .site-footer {
    width: calc(100% - 28px);
    align-items: flex-start;
    flex-direction: column;
    gap: 6px;
  }

  .breadcrumb {
    margin-left: 2px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .site-nav a,
  .primary-action,
  .secondary-action,
  .register-link,
  .material-group-action {
    transition: none;
  }
}