/* ==========================================================================
   base.css — reset, typografia bazowa, kontenery, przyciski, motyw „karb"
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

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

body {
  margin: 0;
  background: var(--surface-paper);
  color: var(--text-ink);
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: var(--lh-body);
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

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

h1,
h2,
h3,
h4 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  line-height: var(--lh-snug);
  letter-spacing: var(--ls-tight);
  color: inherit;
}

h1 {
  font-size: var(--fs-hero);
  line-height: var(--lh-tight);
  font-weight: 700;
}

h2 {
  font-size: var(--fs-3xl);
}

h3 {
  font-size: var(--fs-xl);
}

p {
  margin: 0;
}

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

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

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

/* --------------------------------------------------------------- layout */

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

.section {
  position: relative;
  padding-block: var(--sp-8);
}

.section--paper {
  background: var(--surface-paper);
  color: var(--text-ink);
}

.section--paper-2 {
  background: var(--surface-paper-2);
  color: var(--text-ink);
}

.section--forest {
  background: var(--surface-forest);
  color: var(--text-cream);
}

.section--dark {
  background: var(--surface-dark);
  color: var(--text-cream);
}

/* ------------------------------------------------------------ typografia */

.eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  color: var(--brass-600);
}

.section--forest .eyebrow,
.section--dark .eyebrow,
.overlay-section .eyebrow {
  color: var(--brass-400);
}

.lead {
  font-size: var(--fs-lg);
  color: var(--text-ink-soft);
  max-width: 54ch;
}

.section--forest .lead,
.section--dark .lead,
.overlay-section .lead {
  color: var(--text-cream-soft);
}

.section-head {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  max-width: 62ch;
  margin-bottom: var(--sp-6);
}

.section-head h2 {
  margin-top: var(--sp-1);
}

/* ------------------------------------------------- karb: motyw sygnaturowy
   Nacięcia na blacie: jedno za każdą sprawdzoną rzecz, co piąte głębsze.
   Używany jako dzielnik sekcji (.karb) i jako znacznik listy (.karb-mark). */

.karb {
  display: block;
  width: 100%;
  height: 14px;
  background-image:
    repeating-linear-gradient(
      90deg,
      var(--brass-500) 0 var(--karb-width),
      transparent var(--karb-width) var(--karb-gap)
    ),
    repeating-linear-gradient(
      90deg,
      var(--brass-600) 0 var(--karb-width),
      transparent var(--karb-width) var(--karb-accent-gap)
    );
  background-size: 100% 55%, 100% 100%;
  background-position: 0 100%, 0 0;
  background-repeat: repeat-x;
  opacity: 0.75;
}

.karb--short {
  width: 118px;
  height: 12px;
}

.karb--divider {
  margin-block: var(--sp-6);
  opacity: 0.5;
}

.karb-mark {
  position: relative;
  padding-left: 30px;
}

.karb-mark::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 18px;
  height: 10px;
  background-image: repeating-linear-gradient(
    90deg,
    var(--brass-500) 0 var(--karb-width),
    transparent var(--karb-width) 6px
  );
  background-repeat: repeat-x;
}

/* -------------------------------------------------------------- przyciski */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  min-height: 52px;
  padding: 0.85rem 1.6rem;
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  cursor: pointer;
  transition: transform var(--dur-1) var(--ease-out), background-color var(--dur-1) var(--ease-out),
    color var(--dur-1) var(--ease-out), border-color var(--dur-1) var(--ease-out);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: var(--brass-500);
  color: var(--ink-900);
  box-shadow: var(--sh-card);
}

.btn-primary:hover {
  background: var(--brass-400);
}

.btn-ghost {
  background: transparent;
  color: var(--text-cream);
  border-color: var(--line-brass);
}

.btn-ghost:hover {
  border-color: var(--brass-400);
  background: rgba(201, 154, 91, 0.12);
}

.btn-outline-ink {
  background: transparent;
  color: var(--wood-700);
  border-color: var(--line-ink-strong);
}

.btn-outline-ink:hover {
  border-color: var(--brass-600);
  color: var(--brass-700);
}

.btn--sm {
  min-height: 44px;
  padding: 0.55rem 1.1rem;
  font-size: var(--fs-xs);
}

/* ------------------------------------------------------ ujawnianie sekcji */

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity var(--dur-3) var(--ease-soft), transform var(--dur-3) var(--ease-soft);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .btn:hover {
    transform: none;
  }
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}