/*
 * EzyMat / Notebook Aura
 *
 * Finalny materiał, hierarchia i napięcie. Nie posiada routingu ani logiki
 * biznesowej. Ślady wynikają z realnego stanu, nie z dekoracyjnej patyny.
 */

/* EzyMat 2026 / fundament współczesności */
/* KOLORU tu nie ma - definiuje go motyw.css (laduje sie ostatni). Zostaje
   skala pisma, ktorej motyw nie dotyka. --radius-control i --motion-fast
   tez pochodza z motywu (most na --r-1 i --ruch). */
:root {
  --type-label: .72rem;
  --type-meta: .75rem;
  --type-control: .78rem;
  --type-body: .95rem;
}

/* Bez wlasnego tla: powloke strony ustawia motyw.css. Byl tu jeszcze jeden
   ciemny gradient "biurka" - trzeci z rzedu, po margines.css i
   notebook-tabs.css. */
body {
  line-height: 1.5;
}

/* Masthead i tekst operacyjny korzystają z czytelnego sans-serif. */
.brand,
.brand-claim,
.site-tagline,
.text-action,
.volume-caption,
.site-nav a,
.site-nav .staff-link,
.primary-action,
.secondary-action,
.register-link,
.material-group-action,
.sheet-choice-footer button,
.scene-kicker,
.field-label,
.workspace-state,
.problem-state {
  text-transform: none;
}

.brand {
  font-size: .9rem;
  font-weight: 720;
  letter-spacing: -.01em;
}

.brand-claim,
.site-tagline {
  font-family: var(--display);
  font-size: var(--type-meta);
  letter-spacing: 0;
}

.brand-claim {
  color: var(--tekst-cichy);
}

.site-tagline {
  color: var(--tekst-slaby);
}

.text-action {
  min-height: 40px;
  color: var(--tekst-cichy);
  font: 620 var(--type-meta)/1 var(--display);
  letter-spacing: .01em;
}

.volume-caption {
  color: var(--tekst-slaby);
  font: 620 var(--type-label)/1.4 var(--display);
  letter-spacing: .01em;
}

.volume-caption span {
  font: 650 .68rem/1 var(--mono);
  letter-spacing: .04em;
}

.scene-kicker,
.field-label,
.workspace-state,
.problem-state {
  color: var(--notebook-violet-deep);
  font-family: var(--display);
  font-size: var(--type-label);
  font-weight: 650;
  letter-spacing: .02em;
}

/* Indeks tomu pozostaje nacięciem, ale nie zmienia szerokości przy hoverze. */
.site-nav a,
.site-nav .staff-link {
  width: 80px;
  min-height: 38px;
  padding: 0 11px 0 14px;
  border-color: var(--linia);
  border-radius: 0 var(--radius-control) var(--radius-control) 0;
  background: var(--powierzchnia);
  color: var(--tekst-cichy);
  box-shadow: var(--cien-1);
  font: 650 .72rem/1 var(--display);
  letter-spacing: .005em;
  transition:
    transform var(--motion-fast),
    color var(--motion-fast),
    background var(--motion-fast),
    box-shadow var(--motion-fast);
}

.site-nav a::before {
  width: 3px;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  width: 80px;
  background: var(--notebook-paper);
  color: var(--notebook-ink);
  box-shadow: var(--cien-1);
  transform: translateX(2px);
}

.site-nav a:active {
  box-shadow: 0 1px 0 rgba(0, 0, 0, .14);
  transform: translateX(1px);
}

.site-nav a.is-active {
  width: 82px;
  background: var(--notebook-ink);
  color: var(--notebook-paper);
  box-shadow: var(--cien-1);
  transform: translateX(1px);
}

.site-nav a.is-active::before {
  width: 3px;
}

.site-nav a.is-active span {
  transform: none;
}

/* Papier cyfrowy: światło i krawędź, bez stałej liniatury poza brudnopisem. */
.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-leaf,
.empty-state {
  background-image: linear-gradient(
    90deg,
    var(--powierzchnia-2),
    transparent 18%,
    transparent 84%,
    rgba(24, 19, 25, .018)
  );
  background-color: var(--notebook-paper);
}

.start-stage,
.chapter-stage,
.problem-stage,
.archive-stage,
.auth-stage,
.library-stage,
.empty-state {
  box-shadow: var(--page-depth);
}

.volume-stage::before {
  border-color: var(--linia);
  box-shadow:
    0 1px 0 var(--polysk) inset,
    var(--cien-3);
}

.volume-stage::after {
  bottom: -16px;
  height: 22px;
  box-shadow: 0 14px 30px rgba(0, 0, 0, .34);
}

.start-stage::before,
.chapter-stage::before,
.problem-stage::before,
.archive-stage::before,
.auth-stage::before,
.library-stage::before,
.empty-state::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 6px;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(24, 19, 25, .12), transparent),
    var(--notebook-violet-deep);
  content: "";
  opacity: .7;
}

.start-stage::after,
.chapter-stage::after,
.problem-stage::after,
.archive-stage::after,
.auth-stage::after,
.library-stage::after,
.empty-state::after {
  top: 3px;
  right: -3px;
  bottom: -3px;
  left: 3px;
  border-color: var(--linia);
  opacity: .72;
}

/* Tytuły zachowują redakcyjny charakter, lecz nie dominują nad zadaniem. */
.start-decision h1,
.chapter-copy h1,
.archive-title h1,
.auth-intro h1,
.problem-heading h1,
.library-heading h1,
.sheet-heading h1,
.material-index .index-heading h2,
.range-index .index-heading h2,
.attempt-section .index-heading h2,
.archive-index .index-heading h2,
.tablice-archiwum .index-heading h2 {
  color: var(--notebook-ink);
  font-family: var(--serif);
  font-weight: 520;
  letter-spacing: -.04em;
}

body.student-dashboard-page .start-decision h1 {
  max-width: 14ch;
  font-size: clamp(2.45rem, 5vw, 4.55rem);
  line-height: .98;
}

.chapter-copy h1,
.archive-title h1,
.auth-intro h1 {
  font-size: clamp(2.2rem, 4.4vw, 4.1rem);
  line-height: .98;
}

body.student-library-page .library-heading h1,
body.student-sheet-page .sheet-heading h1 {
  font-size: clamp(2.2rem, 3.9vw, 3.8rem);
  line-height: 1;
}

body.student-solver-page .problem-heading h1 {
  font-size: clamp(1.5rem, 2.45vw, 2.4rem);
  line-height: 1.08;
}

.page-folio,
.library-folio {
  color: var(--tekst-slaby);
  font-family: var(--mono);
  font-size: .68rem;
  letter-spacing: .045em;
  text-transform: uppercase;
}

/* Kontrolki mają stabilną geometrię i komplet stanów. */
.primary-action,
.secondary-action,
.register-link,
.material-group-action,
.sheet-choice-footer button {
  min-height: 44px;
  padding: 11px 16px;
  border-radius: var(--radius-control);
  font: 650 var(--type-control)/1.15 var(--display);
  letter-spacing: .005em;
  box-shadow: 0 2px 0 rgba(24, 19, 25, .16);
  transition:
    transform var(--motion-fast),
    background var(--motion-fast),
    border-color var(--motion-fast),
    color var(--motion-fast),
    box-shadow var(--motion-fast),
    opacity var(--motion-fast);
}

.primary-action,
.sheet-choice-footer button {
  border-color: var(--notebook-ink);
  background: var(--notebook-ink);
  color: var(--notebook-paper);
}

.primary-action:hover,
.primary-action:focus-visible,
.sheet-choice-footer button:hover,
.sheet-choice-footer button:focus-visible {
  background: #241d25;
  color: var(--notebook-paper);
  box-shadow: 0 3px 0 rgba(117, 102, 164, .28);
  transform: translateY(-1px);
}

.secondary-action,
.register-link,
.material-group-action {
  border-color: var(--linia);
  background: var(--powierzchnia-2);
  color: var(--notebook-ink);
}

.secondary-action:hover,
.secondary-action:focus-visible,
.register-link:hover,
.register-link:focus-visible,
.material-group-action:hover,
.material-group-action:focus-visible {
  border-color: var(--notebook-ink);
  background: rgba(24, 19, 25, .06);
  color: var(--notebook-ink);
  box-shadow: 0 3px 0 rgba(24, 19, 25, .14);
  transform: translateY(-1px);
}

.primary-action:active,
.secondary-action:active,
.register-link:active,
.material-group-action:active,
.sheet-choice-footer button:active {
  box-shadow: none;
  transform: translateY(0);
}

.primary-action:disabled,
.secondary-action:disabled,
.material-group-action:disabled,
.sheet-choice-footer button:disabled,
.primary-action[aria-disabled="true"],
.secondary-action[aria-disabled="true"],
.material-group-action[aria-disabled="true"] {
  cursor: not-allowed;
  opacity: .48;
  transform: none;
}

.primary-action[aria-busy="true"],
.secondary-action[aria-busy="true"],
.material-group-action[aria-busy="true"],
.sheet-choice-footer button[aria-busy="true"] {
  cursor: progress;
  opacity: .72;
}

.brudnopis-narzedzia button,
.assessment-button {
  min-width: 44px;
  min-height: 44px;
  border-radius: var(--radius-control);
  transition:
    transform var(--motion-fast),
    background var(--motion-fast),
    border-color var(--motion-fast),
    color var(--motion-fast);
}

.brudnopis-narzedzia button:active,
.assessment-button:active {
  transform: translateY(1px);
}

select,
textarea,
input:not([type="checkbox"]):not([type="radio"]):not([type="hidden"]) {
  min-height: 44px;
  padding: 9px 11px;
  border-color: var(--linia);
  border-radius: var(--radius-control);
  background: var(--powierzchnia);
  color: var(--notebook-ink);
  transition:
    border-color var(--motion-fast),
    box-shadow var(--motion-fast),
    background var(--motion-fast);
}

select:hover,
textarea:hover,
input:not([type="checkbox"]):not([type="radio"]):not([type="hidden"]):hover {
  border-color: var(--linia-mocna);
}

select:focus,
textarea:focus,
input:not([type="checkbox"]):not([type="radio"]):not([type="hidden"]):focus {
  border-color: var(--notebook-violet-deep);
  box-shadow: 0 0 0 3px rgba(117, 102, 164, .13);
}

/* Historia zmienia materiał tylko wtedy, gdy naprawdę istnieje. */
.start-stage.has-trace {
  --start-history-accent: var(--notebook-violet);
}

.start-stage.has-history {
  --start-history-accent: var(--notebook-lime);
}

.start-stage.has-trace::after,
.start-stage.has-history::after {
  box-shadow:
    0 0 0 1px rgba(24, 19, 25, .08),
    5px 7px 0 rgba(117, 102, 164, .1),
    14px 20px 34px rgba(1, 1, 2, .28);
}

.start-stage.has-history .start-art::after,
.start-stage.has-trace .start-art::after {
  background: var(--start-history-accent);
}

/* Rozwiązanie pozostaje zamkniętą warstwą papieru. */
.solution {
  border-color: var(--linia);
  background: var(--powierzchnia-2);
}

.solution summary {
  border-bottom-color: var(--tekst-slaby);
  background:
    linear-gradient(90deg, rgba(117, 102, 164, .06), transparent 40%),
    var(--powierzchnia);
  color: var(--notebook-ink);
}

.solution[open] summary {
  background:
    linear-gradient(90deg, rgba(210, 229, 65, .06), transparent 38%),
    var(--powierzchnia);
}

.solution-toggle {
  color: var(--notebook-violet-deep);
}

/* Pola robocze mają rytm narzędzia, nie obramowanych kart. */
.problem-paper,
.brudnopis,
.sprawdzanie,
.assessment,
.solution-content {
  border-color: var(--linia);
  background-color: var(--powierzchnia-2);
}

.problem-paper {
  background:
    linear-gradient(90deg, rgba(117, 102, 164, .045), transparent 12%),
    var(--powierzchnia-2);
}

/* Papier jest PODKLADEM planszy, nie tlem kanwy: kanwa lezy NAD zadaniem, wiec
   jej wlasne tlo przykrywaloby wycinek mgla i kratka. Gumka (destination-out)
   wyciera tusz wlasnie do tego podkladu. */
.brudnopis .plansza-kadr {
  background:
    linear-gradient(90deg, rgba(24, 19, 25, .04) 1px, transparent 1px) 0 0 / 26px 26px,
    linear-gradient(rgba(24, 19, 25, .04) 1px, transparent 1px) 0 0 / 26px 26px,
    var(--powierzchnia);
}

.problem-state {
  border-color: rgba(117, 102, 164, .45);
  background: transparent;
  color: var(--notebook-violet-deep);
}

/* Rozkładówka zachowuje dwie strony, ale ogranicza stałą scenografię. */
.sheet-stage {
  filter: drop-shadow(0 16px 28px rgba(0, 0, 0, .25));
}

.sheet-stage::after {
  display: none;
}

.sheet-leaf {
  border-color: var(--linia);
  box-shadow:
    0 1px 0 var(--polysk) inset,
    var(--cien-2);
}

.sheet-leaf--summary {
  background-color: var(--powierzchnia);
}

.sheet-leaf--tasks {
  background-color: var(--powierzchnia);
}

.sheet-page-edge {
  opacity: .38;
}

.sheet-task-row,
.task-browser-row,
.sheet-browser-row {
  border-color: var(--linia);
}

/* Świat obecności pozostaje materialny, ale cichy. */
.presence-being--kwadrat {
  filter: drop-shadow(2px 3px 4px rgba(1, 1, 2, .18));
}

.presence-being--kwadrat .presence-kwadrat {
  border-color: var(--linia-mocna);
  background: var(--notebook-paper);
  box-shadow: var(--cien-1);
}

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

.presence-being--ghost,
.presence-being--glitch,
.presence-being--connector {
  opacity: .68;
}

/* Indeksy grupują odstępem; linia pozostaje tylko realną granicą. */
.material-index,
.range-index,
.attempt-section,
.archive-index,
.tablice-archiwum {
  border-color: var(--linia);
  box-shadow: var(--page-depth-small);
}

.material-index::before,
.range-index::before,
.attempt-section::before,
.archive-index::before,
.tablice-archiwum::before {
  border: 0;
  border-left: 3px solid var(--local-accent, var(--notebook-violet));
  border-radius: 0;
  background: var(--notebook-ink);
  color: var(--notebook-paper);
  box-shadow: none;
}

.material-index {
  --local-accent: var(--notebook-violet);
}

.range-index,
.attempt-section {
  --local-accent: var(--notebook-lime);
}

.archive-index {
  --local-accent: var(--notebook-violet);
}

.tablice-archiwum {
  --local-accent: var(--notebook-cool);
}

.material-row,
.range-row,
.archive-row,
.attempt-entry,
.task-browser-row,
.sheet-browser-row,
.sheet-task-row,
.index-heading,
.material-group-head,
.archive-group-head {
  border-color: var(--linia);
}

.material-row,
.range-row,
.archive-row,
.task-browser-row,
.sheet-browser-row,
.sheet-task-row {
  transition:
    background var(--motion-fast),
    color var(--motion-fast),
    transform var(--motion-fast);
}

.material-row:hover,
.range-row:hover,
.archive-row:hover,
.task-browser-row:hover,
.sheet-browser-row:hover,
.sheet-task-row:hover {
  background: rgba(117, 102, 164, .045);
}

.task-browser-row:focus-visible,
.sheet-browser-row:focus-visible,
.sheet-task-link:focus-visible {
  outline-offset: -3px;
}

.taxonomy-path {
  color: var(--notebook-muted);
}

.taxonomy-path strong {
  color: var(--notebook-ink);
}

@media (max-width: 1080px) {
  .site-nav {
    gap: 4px;
    padding: 5px;
    border: 1px solid var(--linia);
    border-radius: var(--r-1);
    background: var(--powierzchnia);
    backdrop-filter: blur(14px);
  }

  .site-nav a,
  .site-nav .staff-link,
  .site-nav a:hover,
  .site-nav a:focus-visible,
  .site-nav a.is-active {
    width: auto;
    min-width: max-content;
    min-height: 44px;
    padding-inline: 14px;
    border: 0;
    border-radius: var(--r-1);
    box-shadow: none;
    transform: none;
  }

  .site-nav a {
    background: transparent;
    color: var(--tekst-cichy);
  }

  /* Na tablecie zakladka lezy na POWIERZCHNI, nie na tuszu: pismo musi isc
     za --tekst. `--notebook-paper` znaczy dzis kolor powierzchni, wiec dawal
     etykiete niewidoczna (powierzchnia na powierzchni) w obu motywach. */
  .site-nav a:hover,
  .site-nav a:focus-visible {
    background: var(--powierzchnia-2);
    color: var(--tekst);
  }

  .site-nav a.is-active {
    background: var(--powierzchnia-2);
    color: var(--tekst);
  }

  .site-nav a::before {
    right: 9px;
    bottom: 4px;
    left: 9px;
    height: 2px;
    border-radius: var(--r-1);
  }

  body.student-dashboard-page .start-decision h1 {
    font-size: clamp(2.3rem, 6.4vw, 4.1rem);
  }

  .chapter-copy h1,
  .archive-title h1,
  .auth-intro h1 {
    font-size: clamp(2.1rem, 5.8vw, 3.7rem);
  }
}

@media (max-width: 620px) {
  .site-header {
    min-height: 60px;
    padding: 14px 0 10px;
    align-items: center;
  }

  .brand-lockup {
    gap: 6px;
  }

  .brand-claim {
    padding-bottom: 6px;
    font-size: .7rem;
  }

  .volume-stage::before,
  .volume-stage::after {
    display: none;
  }

  .site-nav {
    margin-bottom: 10px;
    padding: 4px;
  }

  .site-nav a,
  .site-nav .staff-link {
    min-height: 44px;
    padding-inline: 13px;
    font-size: .74rem;
  }

  .volume-caption {
    min-height: 26px;
    font-size: .7rem;
  }

  .start-stage,
  .chapter-stage,
  .problem-stage,
  .archive-stage,
  .auth-stage,
  .library-stage,
  .empty-state {
    box-shadow:
      0 1px 0 var(--notebook-paper-edge),
      0 10px 24px rgba(1, 1, 2, .28);
  }

  body.student-dashboard-page .start-decision h1,
  body.student-library-page .library-heading h1,
  body.student-sheet-page .sheet-heading h1 {
    font-size: clamp(1.9rem, 9.5vw, 2.85rem);
  }

  .chapter-copy h1,
  .archive-title h1,
  .auth-intro h1 {
    font-size: clamp(2rem, 10vw, 3rem);
  }

  body.student-solver-page .problem-heading h1 {
    font-size: clamp(1.35rem, 6.4vw, 1.85rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-nav a,
  .primary-action,
  .secondary-action,
  .register-link,
  .material-group-action,
  .sheet-choice-footer button,
  .brudnopis-narzedzia button,
  .assessment-button,
  select,
  textarea,
  input,
  .material-row,
  .range-row,
  .archive-row,
  .task-browser-row,
  .sheet-browser-row,
  .sheet-task-row {
    transition: none;
  }
}