/* layout.css — powloka aplikacji, przelaczanie widokow, siatka ekranu gry */

.app-bar {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  padding: var(--sp-3) var(--sp-4);
  /* lekko przezroczysty pasek z blurem — tresc "przeplywa" pod headerem
     przy scrollu; pelny kolor zostaje fallbackiem bez backdrop-filter */
  background: var(--bg-raised);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
}
@supports (backdrop-filter: blur(8px)) {
  .app-bar {
    background: color-mix(in srgb, var(--bg-raised) 86%, transparent);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
  }
}
.brand:hover .brand-accent { fill: var(--accent-strong); }
.brand .brand-accent { transition: fill .15s var(--ease); }

.brand {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  letter-spacing: -.01em;
}
.brand-mark { width: 26px; height: 26px; flex: 0 0 auto; }
.brand-tiles { fill: currentColor; }
.brand-accent { fill: var(--accent); }
.brand-name { font-size: 17px; }

.app-nav {
  display: flex;
  gap: var(--sp-1);
  margin-left: auto;
  flex-wrap: wrap;
}

.nav-group { display: contents; }
.nav-group-label { display: none; }

.nav-toggle {
  display: none;
  appearance: none;
  align-items: center;
  gap: 7px;
  min-height: 38px;
  padding: 0 11px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-raised);
  color: var(--text);
  font-size: 14px;
  font-weight: 650;
  cursor: pointer;
}
.nav-toggle:hover { border-color: var(--accent); }
.nav-toggle:active { transform: translateY(1px); }
.nav-toggle-icon {
  display: grid;
  gap: 3px;
  width: 16px;
}
.nav-toggle-icon span {
  display: block;
  width: 16px;
  height: 1.5px;
  border-radius: 2px;
  background: currentColor;
  transform-origin: center;
  transition: transform .18s var(--ease), opacity .12s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-icon span:nth-child(1) { transform: translateY(4.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-icon span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-icon span:nth-child(3) { transform: translateY(-4.5px) rotate(-45deg); }

/* kolor + glif przypisane do funkcji — jedno zrodlo dla nawigacji i kart na
   ekranie glownym (wayfinding: ta sama figura i barwa prowadza do tego samego
   miejsca w calej apce) */
[data-view="play"]     { --hc-c: var(--accent); --nav-glyph: "♟"; }
[data-view="computer"] { --hc-c: var(--accent); --nav-glyph: "♞"; }
[data-view="lessons"]  { --hc-c: var(--accent); --nav-glyph: "♙"; }
[data-view="openings"] { --hc-c: var(--accent); --nav-glyph: "♗"; }
[data-view="practice"] { --hc-c: var(--accent); --nav-glyph: "♛"; }
[data-view="analysis"] { --hc-c: var(--accent); --nav-glyph: "♝"; }
[data-view="history"]  { --hc-c: var(--accent); --nav-glyph: "♜"; }

.nav-btn {
  appearance: none;
  border: 1px solid transparent;
  background: transparent;
  padding: 8px 12px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 14px;
  font-weight: 550;
  color: var(--text-dim);
  display: inline-flex;
  align-items: center;
  gap: 7px;
  white-space: nowrap;
  transition: color .15s var(--ease), background-color .15s var(--ease), border-color .15s var(--ease);
}
.nav-btn::before {
  /* skladnia "tresc / alternatywa": pusty alt wylacza glif z accessible name
     (dekoracja — etykieta przycisku ma zostac czystym tekstem) */
  content: var(--nav-glyph, "") / "";
  font-size: 15px;
  line-height: 1;
  color: color-mix(in srgb, var(--hc-c, var(--accent)) 82%, var(--text-dim));
  transition: transform .15s var(--ease);
}
.nav-btn:hover:not(:disabled) { color: var(--text); background: var(--bg-sunken); }
.nav-btn:hover:not(:disabled)::before { transform: translateY(-1px); }
.nav-btn.is-active {
  color: var(--text);
  font-weight: 650;
  background: color-mix(in srgb, var(--hc-c, var(--accent)) 13%, var(--bg-sunken));
  border-color: color-mix(in srgb, var(--hc-c, var(--accent)) 32%, var(--border));
}
.nav-btn:disabled { opacity: .5; cursor: not-allowed; }

[data-theme="light"] .nav-btn::before { color: color-mix(in srgb, var(--hc-c, var(--accent)) 64%, var(--text)); }

.soon {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: .06em;
  padding: 2px 5px;
  border-radius: 4px;
  background: var(--bg-sunken);
  border: 1px solid var(--border);
  color: var(--text-dim);
}

.app-main { padding: var(--sp-5) var(--sp-4) var(--sp-6); }

.view { display: none; }
.view.is-active { display: block; }

/* ---- ekran glowny ---- */
.home { max-width: 1080px; margin: 0 auto; }
.home-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: clamp(32px, 7vw, 96px);
  align-items: end;
  margin: clamp(12px, 3vw, 32px) 0 clamp(34px, 5vw, 58px);
}
.home-kicker {
  margin: 0 0 12px;
  color: var(--accent-strong);
  font-size: 12px;
  font-weight: 720;
  letter-spacing: .105em;
  text-transform: uppercase;
}
.home-title {
  max-width: 720px;
  font-size: clamp(36px, 5.2vw, 64px);
  line-height: .98;
  letter-spacing: -.045em;
  text-wrap: balance;
}
.home-lead {
  color: var(--text-dim);
  max-width: 60ch;
  margin: 20px 0 0;
  font-size: 16px;
  line-height: 1.6;
  text-wrap: pretty;
}
.home-facts {
  display: grid;
  grid-template-columns: repeat(3, auto);
  gap: 24px;
  margin: 0 0 4px;
}
.home-facts div { min-width: 62px; }
.home-facts dt {
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 650;
  font-variant-numeric: tabular-nums;
}
.home-facts dd {
  margin: 4px 0 0;
  color: var(--text-dim);
  font-size: 12px;
  white-space: nowrap;
}

.home-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  grid-template-areas:
    "play computer computer analysis"
    "lessons computer computer practice"
    "history history openings openings";
  gap: var(--sp-3);
}
.home-card[data-view="play"] { grid-area: play; }
.home-card[data-view="computer"] { grid-area: computer; }
.home-card[data-view="analysis"] { grid-area: analysis; }
.home-card[data-view="lessons"] { grid-area: lessons; }
.home-card[data-view="history"] { grid-area: history; }
.home-card[data-view="openings"] { grid-area: openings; }
.home-card[data-view="practice"] { grid-area: practice; }

.home-card {
  appearance: none;
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: var(--sp-4);
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: border-color .15s var(--ease), transform .12s var(--ease);
  min-height: 176px;
  position: relative;
  overflow: hidden;
}
.home-card:hover:not(.is-locked) {
  border-color: var(--hc-c, var(--accent));
  transform: translateY(-2px);
  box-shadow: 0 8px 22px color-mix(in srgb, var(--hc-c, var(--accent)) 18%, transparent);
}
.home-card.is-locked { cursor: default; opacity: .62; }

.home-card--main {
  min-height: 364px;
  padding: clamp(24px, 3vw, 34px);
  border-color: color-mix(in srgb, var(--accent) 64%, var(--border));
  background: linear-gradient(145deg, color-mix(in srgb, var(--accent) 10%, var(--bg-raised)), var(--bg-raised) 62%);
}
.home-card--main::after {
  content: "";
  position: absolute;
  right: -36px;
  bottom: -38px;
  width: 190px;
  height: 190px;
  opacity: .2;
  background:
    linear-gradient(90deg, transparent 50%, var(--accent) 50%) 0 0 / 64px 64px,
    linear-gradient(var(--accent) 50%, transparent 50%) 0 0 / 64px 64px;
  transform: rotate(-12deg);
  pointer-events: none;
}
.home-card--main .home-card-icon { width: 54px; height: 54px; }
.home-card--main .home-card-icon svg { width: 42px; height: 42px; }
.home-card--main .home-card-title { margin-top: auto; font-size: 28px; letter-spacing: -.03em; }
.home-card--main .home-card-desc { max-width: 34ch; font-size: 15px; }
.home-card-action {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 14px;
  color: var(--accent-strong);
  font-size: 13px;
  font-weight: 700;
}
.home-card-action span { transition: transform .15s var(--ease); }
.home-card:hover .home-card-action span { transform: translateX(3px); }

.home-card-icon {
  display: grid; place-items: center;
  width: 44px; height: 44px;
  margin-bottom: 2px;
  border-radius: var(--radius);
  font-size: 26px; line-height: 1;
  color: var(--hc-c, var(--accent));
  background: color-mix(in srgb, var(--hc-c, var(--accent)) 14%, var(--bg-sunken));
  border: 1px solid color-mix(in srgb, var(--hc-c, var(--accent)) 24%, var(--border));
  transition: transform .15s var(--ease);
}
.home-card-icon svg {
  width: 34px;
  height: 34px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: square;
  stroke-linejoin: miter;
}
.home-card-icon .accent-line { stroke: var(--text); opacity: .72; }
.home-card-icon .icon-dot { stroke-width: 4; stroke-linecap: round; }
.home-card:hover:not(.is-locked) .home-card-icon { transform: scale(1.06) rotate(-3deg); }

/* jasny motyw: te same odcienie przyciemnione do kontrastu na bialych kartach
   (zloto/pomarancz w pelnym nasyceniu nie domyka 4.5:1 na jasnym tle) */
[data-theme="light"] .home-card-tag { color: color-mix(in srgb, var(--hc-c, var(--accent)) 58%, var(--text)); }
[data-theme="light"] .home-card-icon { color: color-mix(in srgb, var(--hc-c, var(--accent)) 70%, var(--text)); }

.home-card-tag {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--hc-c, var(--accent));
  font-weight: 700;
}
.home-card.is-locked .home-card-tag { color: var(--text-dim); }
.home-card-title { font-size: 19px; font-weight: 650; }
.home-card-desc { font-size: 14px; color: var(--text-dim); line-height: 1.45; }

@media (max-width: 820px) {
  .home-intro { grid-template-columns: 1fr; gap: 24px; }
  .home-facts { justify-content: start; }
  .home-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-template-areas:
      "computer computer"
      "play analysis"
      "lessons practice"
      "history openings";
  }
  .home-card--main { min-height: 270px; }
}

@media (max-width: 520px) {
  .home-intro { margin-top: 8px; margin-bottom: 30px; }
  .home-title { font-size: clamp(38px, 12vw, 50px); }
  .home-facts { width: 100%; justify-content: space-between; gap: 12px; }
  .home-grid { display: flex; flex-direction: column; }
  .home-card[data-view="computer"] { order: -1; }
  .home-card, .home-card--main { min-height: 0; }
  .home-card--main { padding: 24px; }
  .home-card--main .home-card-title { margin-top: 34px; }
}

/* ---- ekran gry ---- */
.play-layout {
  display: grid;
  grid-template-columns: minmax(320px, 1fr) 320px;
  gap: var(--sp-5);
  align-items: start;
  max-width: 1180px;
  margin: 0 auto;
}

.board-column {
  display: flex;
  flex-direction: row;
  gap: var(--sp-2);
  min-width: 0;
  justify-content: center;
}

.board-stack {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  min-width: 0;
  width: 100%;
  max-width: min(72vh, 640px);
}

.board-wrap {
  position: relative;
  width: 100%;
}

.side-panel {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  position: sticky;
  top: 78px;
}

/* ukladanie na waskich ekranach: panel pod plansza */
@media (max-width: 900px) {
  .play-layout { grid-template-columns: 1fr; }
  .side-panel { position: static; }
  .board-stack { max-width: min(calc(96vw - 34px), 560px); }
  .app-main { padding: var(--sp-4) var(--sp-3) var(--sp-6); }
}

/* Na telefonie wszystkie sekcje sa w jawnym panelu otwieranym przyciskiem Menu.
   Nie wymagamy od uzytkownika odkrycia poziomego przewijania. */
@media (max-width: 760px) {
  .app-bar { gap: var(--sp-2); }
  .nav-toggle {
    display: inline-flex;
    margin-left: auto;
  }
  .app-nav {
    position: absolute;
    top: calc(100% + 8px);
    left: var(--sp-3);
    right: var(--sp-3);
    display: grid;
    gap: var(--sp-3);
    margin: 0;
    padding: var(--sp-3);
    max-height: calc(100dvh - 84px);
    overflow-y: auto;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: var(--bg-raised);
    box-shadow: var(--shadow);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-8px) scale(.985);
    transform-origin: top right;
    transition: opacity .16s var(--ease), transform .18s var(--ease), visibility .18s;
  }
  .app-nav.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0) scale(1);
  }
  .nav-group {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 6px;
  }
  .nav-group + .nav-group {
    padding-top: var(--sp-3);
    border-top: 1px solid var(--border);
  }
  .nav-group-label {
    display: block;
    grid-column: 1 / -1;
    margin: 0 4px 2px;
    color: var(--text-dim);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
  }
  .nav-btn {
    width: 100%;
    min-height: 44px;
    justify-content: flex-start;
    padding: 9px 10px;
  }
}

@media (max-width: 480px) {
  .app-bar { gap: var(--sp-2); padding: var(--sp-2) var(--sp-3); }
  .soon { display: none; }
  .board-stack { max-width: calc(100vw - 34px); }
}

@media (max-width: 360px) {
  .brand-name { display: none; }
}

/* ---- stopka: marka + dwie kolumny linkow + rzad meta ---- */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-sunken);
  padding: var(--sp-6) clamp(16px, 4vw, 40px) var(--sp-3);
  font-size: 13.5px;
}
.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--sp-5) var(--sp-6);
  max-width: 1180px;
  margin: 0 auto;
}
.footer-brand-row { display: inline-flex; align-items: center; gap: 8px; }
.footer-brand-row .brand-mark { width: 22px; height: 22px; }
.footer-brand-name { font-weight: 700; font-size: 15px; letter-spacing: -.01em; }
.footer-tagline {
  margin: var(--sp-2) 0 0;
  color: var(--text-dim);
  font-size: 13px;
  line-height: 1.55;
  max-width: 44ch;
}
.footer-col { display: flex; flex-direction: column; gap: 7px; align-items: flex-start; }
.footer-col-title {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--text-dim);
  margin: 0 0 3px;
}
.site-footer a { color: var(--text-dim); text-decoration: none; }
.site-footer a:hover { color: var(--accent-strong); text-decoration: underline; }
.footer-col a { padding: 1px 0; }

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 4px 18px;
  max-width: 1180px;
  margin: var(--sp-5) auto 0;
  padding-top: var(--sp-3);
  border-top: 1px solid var(--border);
}
.footer-credit { margin: 0; font-size: 12.5px; color: var(--text-dim); }
.footer-credit a { text-decoration: underline; text-underline-offset: 2px; }

/* odnosnik zgody dokladany skryptem na koncu stopki — wyrownany do rzedu meta */
.site-footer .consent-reopen {
  display: block;
  width: 100%;
  margin: 6px auto 0;
  max-width: 1180px;
  padding: 0;
  text-align: left;
}

@media (max-width: 760px) {
  .footer-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .footer-brand { grid-column: 1 / -1; }
  .footer-meta { flex-direction: column; align-items: flex-start; }
}