/* ==========================================================================
   base.css — reset, typografia bazowa, kontenery, przyciski, sygnatura
   ========================================================================== */

*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + var(--sp-4));
}

body {
  margin: 0;
  background: var(--bg-page);
  color: var(--text-body);
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: var(--lh-body);
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 400;
  color: var(--text-strong);
  letter-spacing: var(--ls-display);
  line-height: var(--lh-snug);
  text-wrap: balance;
}

h1 { font-size: var(--fs-3xl); line-height: var(--lh-tight); }
h2 { font-size: var(--fs-2xl); }
h3 { font-size: var(--fs-lg); }
h4 { font-size: var(--fs-md); }

p { margin: 0 0 var(--sp-4); }
p:last-child { margin-bottom: 0; }

a {
  color: inherit;
  text-decoration: none;
}

img, svg, iframe { max-width: 100%; display: block; }
img { height: auto; }

ul, ol { margin: 0; padding: 0; list-style: none; }

button, input, textarea, select {
  font: inherit;
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--gold-500);
  outline-offset: 3px;
  border-radius: var(--r-xs);
}

::selection {
  background: var(--gold-500);
  color: var(--navy-900);
}

/* --- Layout helpers ------------------------------------------------------ */

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.container--narrow { max-width: var(--container-narrow); }

.section {
  position: relative;
  padding-block: var(--section-y);
}

.section--tight { padding-block: calc(var(--section-y) * 0.66); }

.section--dark {
  background: var(--bg-dark);
  color: var(--text-on-dark);
}

.section--dark h2,
.section--dark h3,
.section--dark h4 { color: var(--cream-50); }

.section--paper { background: var(--cream-50); }

.bleed {
  width: 100vw;
  margin-left: calc(50% - 50vw);
}

.skip-link {
  position: absolute;
  left: var(--sp-4);
  top: var(--sp-2);
  transform: translateY(-200%);
  background: var(--gold-500);
  color: var(--navy-900);
  padding: var(--sp-2) var(--sp-4);
  border-radius: var(--r-sm);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  z-index: 200;
  transition: transform var(--dur-fast) var(--ease-out);
}
.skip-link:focus { transform: translateY(0); }

/* --- Eyebrow / mono labels ---------------------------------------------- */

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
  margin: 0 0 var(--sp-4);
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  font-weight: 500;
  letter-spacing: var(--ls-mono-wide);
  text-transform: uppercase;
  color: var(--gold-600);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--gold-500);
  flex: none;
}

.section--dark .eyebrow { color: var(--gold-400); }

/* --- SYGNATURA: linia księgi rachunkowej --------------------------------- */
/* Cienka złota linia z trzema pionowymi znacznikami, jak rubryka w księdze.  */

.ledger-rule {
  position: relative;
  height: 11px;
  margin: var(--sp-6) 0;
  border-top: 1px solid var(--line-strong);
}

.ledger-rule::before,
.ledger-rule::after {
  content: "";
  position: absolute;
  top: 0;
  width: 1px;
  height: 11px;
  background: var(--gold-500);
}

.ledger-rule::before { left: 0; }
.ledger-rule::after { left: 46px; }

.ledger-rule--center {
  width: 120px;
  margin-inline: auto;
}
.ledger-rule--center::after { left: auto; right: 0; }

.section--dark .ledger-rule { border-top-color: rgba(201, 162, 74, 0.4); }

/* Tekstura siatki księgowej pod ciemnymi sekcjami */
.ledger-grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(to right, var(--ledger-line) 0 1px, transparent 1px var(--ledger-step)),
    repeating-linear-gradient(to bottom, var(--ledger-line-soft) 0 1px, transparent 1px var(--ledger-step));
  mask-image: linear-gradient(to bottom, transparent, #000 22%, #000 78%, transparent);
  -webkit-mask-image: linear-gradient(to bottom, transparent, #000 22%, #000 78%, transparent);
}

/* --- Buttons ------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-3);
  padding: 0.95rem 1.7rem;
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  font-weight: 500;
  letter-spacing: 0.06em;
  cursor: pointer;
  text-align: center;
  transition: background var(--dur-fast) var(--ease-out),
              color var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out),
              transform var(--dur-fast) var(--ease-out);
}

.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--gold-500);
  color: var(--navy-900);
  border-color: var(--gold-500);
}
.btn-primary:hover {
  background: var(--gold-400);
  border-color: var(--gold-400);
}

.btn-ghost {
  background: transparent;
  color: var(--text-on-dark);
  border-color: rgba(238, 231, 216, 0.34);
}
.btn-ghost:hover {
  border-color: var(--gold-500);
  color: var(--gold-300);
}

.btn-outline {
  background: transparent;
  color: var(--ink-900);
  border-color: var(--line-strong);
}
.btn-outline:hover {
  border-color: var(--gold-600);
  color: var(--gold-700);
}

.btn-sm { padding: 0.62rem 1.15rem; font-size: var(--fs-xs); }

/* --- Section heading block ---------------------------------------------- */

.sec-head { max-width: 62ch; }
.sec-head p {
  margin-top: var(--sp-4);
  font-size: var(--fs-md);
  color: var(--text-muted);
}
.section--dark .sec-head p { color: var(--text-on-dark-muted); }

.sec-head--center {
  margin-inline: auto;
  text-align: center;
}
.sec-head--center .eyebrow { justify-content: center; }

/* --- Reveal animation ---------------------------------------------------- */

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity var(--dur-slow) var(--ease-out),
              transform var(--dur-slow) var(--ease-out);
  will-change: opacity, transform;
}
.reveal.is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}