/* ============================================================
   Kokpit KSeF — landing
   Aesthetic: "cyfrowa księga" — paper ledger, ink, acid accent
   ============================================================ */

:root {
  --paper: #f6f3ea;
  --paper-deep: #efeadb;
  --ink: #0d1f18;
  --ink-soft: #3d4f47;
  --acid: #b6f04a;
  --acid-deep: #8fd41f;
  --signal: #e4572e;
  --rule: rgba(13, 31, 24, 0.12);

  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Schibsted Grotesk", "Helvetica Neue", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;

  --w: min(1180px, 92vw);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background-color: var(--paper);
  color: var(--ink);
  line-height: 1.6;
  /* ledger ruling */
  background-image:
    repeating-linear-gradient(
      to bottom,
      transparent 0,
      transparent 31px,
      var(--rule) 31px,
      var(--rule) 32px
    );
  background-attachment: fixed;
}

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

.num { font-family: var(--font-mono); font-weight: 500; letter-spacing: -0.02em; }

/* ---------- buttons ---------- */

.btn {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  padding: 0.9em 1.6em;
  border: 2px solid var(--ink);
  color: var(--ink);
  background: transparent;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.btn--primary {
  background: var(--acid);
  box-shadow: 4px 4px 0 var(--ink);
}
.btn--primary:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--ink);
}
.btn--primary:active {
  transform: translate(2px, 2px);
  box-shadow: 0 0 0 var(--ink);
}

.btn--ghost:hover { background: var(--paper-deep); }

.btn--small { padding: 0.55em 1.1em; font-size: 0.85rem; background: var(--acid); }

.btn--full { width: 100%; text-align: center; font-size: 1.05rem; }

/* ---------- nav ---------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 2px solid var(--ink);
}

.nav__inner {
  width: var(--w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 0.8rem 0;
}

.nav__logo {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--ink);
}

.nav__logo-mark {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.15rem;
  background: var(--ink);
  color: var(--acid);
  padding: 0.05em 0.35em;
}

.nav__logo-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
}

.nav__links {
  display: flex;
  gap: 1.6rem;
  margin-left: auto;
}

.nav__links a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
}
.nav__links a:hover { color: var(--ink); text-decoration: underline 2px var(--acid-deep); text-underline-offset: 4px; }

/* mobile nav toggle */

.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 2.2rem;
  height: 2.2rem;
  border: 2px solid var(--ink);
  background: transparent;
  cursor: pointer;
  padding: 0;
}

.nav__toggle span {
  display: block;
  height: 2px;
  margin: 0 auto;
  width: 1.2rem;
  background: var(--ink);
}

/* ---------- hero ---------- */

.hero { overflow: hidden; }

.hero__inner {
  width: var(--w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3rem;
  align-items: center;
  padding: 5rem 0 4.5rem;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-soft);
  border-left: 4px solid var(--acid-deep);
  padding-left: 0.75rem;
  margin-bottom: 1.4rem;
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 5.2vw, 4.4rem);
  font-weight: 700;
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin-bottom: 1.4rem;
}

.hero__title em {
  font-style: italic;
  background: linear-gradient(transparent 62%, var(--acid) 62%);
}

.hero__lead {
  font-size: 1.15rem;
  color: var(--ink-soft);
  max-width: 34em;
  margin-bottom: 2rem;
}

.hero__cta { display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 2.6rem; }

/* countdown */

.countdown {
  display: inline-block;
  border: 2px solid var(--ink);
  background: var(--paper-deep);
  padding: 1rem 1.4rem;
  box-shadow: 6px 6px 0 rgba(13, 31, 24, 0.15);
}

.countdown__label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--signal);
  margin-bottom: 0.5rem;
}

.countdown__grid { display: flex; gap: 1.4rem; }

.countdown__cell { text-align: center; }

.countdown__cell span {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  display: block;
  line-height: 1.1;
}

.countdown__cell small {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-soft);
}

/* dashboard mockup */

.hero__visual { position: relative; }

.mockup {
  background: #fdfcf8;
  border: 2px solid var(--ink);
  box-shadow: 10px 10px 0 rgba(13, 31, 24, 0.85);
  transform: rotate(1.2deg);
  font-size: 0.88rem;
}

.mockup__bar {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 0.9rem;
  border-bottom: 2px solid var(--ink);
  background: var(--paper-deep);
}

.mockup__dot {
  width: 9px; height: 9px;
  border-radius: 50%;
  border: 1.5px solid var(--ink);
}
.mockup__dot:first-child { background: var(--signal); }
.mockup__dot:nth-child(2) { background: #f0c948; }
.mockup__dot:nth-child(3) { background: var(--acid); }

.mockup__title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-soft);
  margin-left: 0.5rem;
}

.mockup__head,
.mockup__row {
  display: grid;
  grid-template-columns: 1.6fr 0.8fr 0.8fr;
  gap: 0.5rem;
  padding: 0.6rem 0.9rem;
  align-items: center;
}

.mockup__head {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--rule);
}

.mockup__row { border-bottom: 1px solid var(--rule); }
.mockup__row:hover { background: color-mix(in srgb, var(--acid) 14%, transparent); }

.chip {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.15em 0.6em;
  border: 1.5px solid var(--ink);
  justify-self: start;
}
.chip--ok    { background: var(--acid); }
.chip--warn  { background: #f0c948; }
.chip--alert { background: var(--signal); color: #fff; }

.mockup__foot {
  padding: 0.6rem 0.9rem;
  font-size: 0.75rem;
  color: var(--ink-soft);
  background: var(--paper-deep);
}

.stamp {
  position: absolute;
  top: -1.6rem;
  right: -0.6rem;
  transform: rotate(8deg);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  text-align: center;
  color: var(--signal);
  border: 2.5px solid var(--signal);
  border-radius: 50%;
  padding: 1.1rem 0.7rem;
  line-height: 1.35;
  background: color-mix(in srgb, var(--paper) 80%, transparent);
}

/* ---------- ticker ---------- */

.ticker {
  border-top: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
  background: var(--ink);
  color: var(--acid);
  overflow: hidden;
  padding: 0.55rem 0;
}

.ticker__track {
  display: flex;
  gap: 1.6rem;
  white-space: nowrap;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  animation: ticker 28s linear infinite;
  width: max-content;
}

@keyframes ticker {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* ---------- stats ---------- */

.stats { background: var(--paper-deep); border-bottom: 2px solid var(--ink); }

.stats__inner {
  width: var(--w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  padding: 2.6rem 0;
}

.stat__num {
  display: block;
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  font-weight: 600;
  margin-bottom: 0.3rem;
}

.stat__label { color: var(--ink-soft); font-size: 0.95rem; max-width: 24em; display: block; }

/* ---------- sections ---------- */

.section { padding: 5.5rem 0; }

.section--tint { background: var(--paper-deep); border-top: 2px solid var(--ink); border-bottom: 2px solid var(--ink); }

.section--dark {
  background: var(--ink);
  color: var(--paper);
  background-image:
    repeating-linear-gradient(
      to bottom,
      transparent 0,
      transparent 31px,
      rgba(246, 243, 234, 0.07) 31px,
      rgba(246, 243, 234, 0.07) 32px
    );
}

.section__inner { width: var(--w); margin: 0 auto; }
.section__inner--narrow { max-width: 720px; }

.section__kicker {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--signal);
  margin-bottom: 1rem;
}

.section--dark .section__kicker { color: var(--acid); }

.section__title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.1rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.015em;
  margin-bottom: 1.4rem;
  max-width: 18em;
}

.section__lead {
  font-size: 1.12rem;
  color: var(--ink-soft);
  max-width: 38em;
  margin-bottom: 2.8rem;
}

.section--dark .section__lead { color: color-mix(in srgb, var(--paper) 75%, transparent); }

/* problem cards */

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.4rem;
}

.card {
  background: #fdfcf8;
  border: 2px solid var(--ink);
  padding: 1.6rem;
  box-shadow: 5px 5px 0 rgba(13, 31, 24, 0.2);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.card:hover {
  transform: translate(-3px, -3px);
  box-shadow: 8px 8px 0 rgba(13, 31, 24, 0.85);
}

.card__index {
  display: inline-block;
  font-size: 0.9rem;
  font-weight: 600;
  background: var(--signal);
  color: #fff;
  padding: 0.1em 0.55em;
  margin-bottom: 1rem;
}

.card h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  line-height: 1.25;
  margin-bottom: 0.6rem;
}

.card p { color: var(--ink-soft); font-size: 0.97rem; }

/* features */

.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border: 1px solid rgba(246, 243, 234, 0.25);
}

.feature {
  padding: 1.8rem 1.6rem;
  border: 1px solid rgba(246, 243, 234, 0.25);
  transition: background 0.2s ease;
}

.feature:hover { background: rgba(182, 240, 74, 0.07); }

.feature h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  margin-bottom: 0.6rem;
}

.feature h3 .num { color: var(--acid); margin-right: 0.3rem; }

.feature p { color: color-mix(in srgb, var(--paper) 72%, transparent); font-size: 0.95rem; }

/* steps */

.steps {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.4rem;
  counter-reset: step;
}

.step { position: relative; padding-top: 0.4rem; }

.step__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.6rem; height: 2.6rem;
  font-size: 1.2rem;
  font-weight: 600;
  border: 2px solid var(--ink);
  border-radius: 50%;
  background: var(--acid);
  margin-bottom: 1rem;
}

.step h3 { font-family: var(--font-display); font-size: 1.25rem; margin-bottom: 0.5rem; }
.step p { color: var(--ink-soft); font-size: 0.97rem; }

/* pricing */

.pricing {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.4rem;
  align-items: start;
}

.price {
  background: #fdfcf8;
  border: 2px solid var(--ink);
  padding: 1.8rem 1.6rem;
}

.price--featured {
  background: var(--ink);
  color: var(--paper);
  box-shadow: 8px 8px 0 var(--acid-deep);
  transform: translateY(-0.6rem);
}

.price__badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--acid);
  margin-bottom: 0.7rem;
}

.price h3 { font-family: var(--font-display); font-size: 1.4rem; margin-bottom: 0.6rem; }

.price__num { margin-bottom: 1.2rem; }
.price__num .num { font-size: 2.2rem; font-weight: 600; }
.price__num small { font-family: var(--font-mono); color: inherit; opacity: 0.6; }

.price ul { list-style: none; }

.price li {
  padding: 0.45rem 0 0.45rem 1.5rem;
  position: relative;
  font-size: 0.95rem;
  border-bottom: 1px dashed var(--rule);
}

.price--featured li { border-bottom-color: rgba(246, 243, 234, 0.2); }

.price li::before {
  content: "✓";
  position: absolute;
  left: 0;
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--acid-deep);
}

.price--featured li::before { color: var(--acid); }

/* waitlist */

.waitlist {
  display: grid;
  gap: 1.2rem;
  background: rgba(246, 243, 234, 0.04);
  border: 1px solid rgba(246, 243, 234, 0.25);
  padding: 2rem;
}

.waitlist__field { display: grid; gap: 0.4rem; }

.waitlist__field label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--acid);
}

.waitlist__field input,
.waitlist__field select {
  font-family: var(--font-body);
  font-size: 1rem;
  padding: 0.8em 1em;
  background: var(--paper);
  color: var(--ink);
  border: 2px solid transparent;
  outline: none;
}

.waitlist__field input:focus,
.waitlist__field select:focus { border-color: var(--acid); }

.waitlist__field input.invalid { border-color: var(--signal); }

.waitlist__field--hp {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  left: -9999px;
}

.field-error {
  font-size: 0.82rem;
  color: var(--signal);
  min-height: 1.1em;
}

#waitlist-form-error:empty { display: none; }
#waitlist-form-error {
  font-size: 0.9rem;
  color: var(--signal);
  font-weight: 600;
}

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

.waitlist__note {
  font-size: 0.8rem;
  color: color-mix(in srgb, var(--paper) 55%, transparent);
}

.waitlist__success {
  border: 2px solid var(--acid);
  padding: 2rem;
  text-align: center;
}

.waitlist__success .num {
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--acid);
  margin-bottom: 0.5rem;
}

/* faq */

.faq {
  border: 2px solid var(--ink);
  background: #fdfcf8;
  margin-bottom: 0.9rem;
}

.faq summary {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  padding: 1.1rem 1.4rem;
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 3rem;
}

.faq summary::-webkit-details-marker { display: none; }

.faq summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.4rem;
  position: absolute;
  right: 1.2rem;
  top: 50%;
  transform: translateY(-50%);
  transition: transform 0.2s ease;
}

.faq[open] summary::after { transform: translateY(-50%) rotate(45deg); }

.faq p {
  padding: 0 1.4rem 1.2rem;
  color: var(--ink-soft);
  font-size: 0.97rem;
}

/* footer */

.footer { background: var(--ink); color: var(--paper); padding: 2.6rem 0; border-top: 4px solid var(--acid); }

.footer__inner {
  width: var(--w);
  margin: 0 auto;
  display: grid;
  gap: 0.5rem;
}

.footer .num { color: var(--acid); font-size: 0.9rem; }
.footer .num a { color: inherit; }

.footer__fine { font-size: 0.78rem; color: color-mix(in srgb, var(--paper) 50%, transparent); margin-top: 0.8rem; }

/* ---------- reveal animation ---------- */

.reveal {
  opacity: 0;
  transform: translateY(18px);
  animation: reveal 0.7s ease forwards;
  animation-delay: calc(var(--d, 0) * 0.12s);
}

@keyframes reveal {
  to { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: reduce) {
  .reveal { animation: none; opacity: 1; transform: none; }
  .ticker__track { animation: none; }
  html { scroll-behavior: auto; }
}

/* ---------- responsive ---------- */

@media (max-width: 960px) {
  .hero__inner { grid-template-columns: 1fr; padding-top: 3.5rem; }
  .hero__visual { max-width: 480px; }
  .stats__inner, .cards, .features, .steps, .pricing { grid-template-columns: 1fr; }
  .features { border: none; gap: 0.9rem; }
  .feature { border: 1px solid rgba(246, 243, 234, 0.25); }
  .price--featured { transform: none; }

  .nav__toggle { display: flex; }

  .nav__links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--paper);
    border-bottom: 2px solid var(--ink);
  }

  .nav__links.is-open { display: flex; }

  .nav__links a {
    padding: 0.9rem var(--w, 6vw);
    border-top: 1px solid var(--rule);
  }
}

@media (max-width: 520px) {
  .countdown__grid { gap: 0.9rem; }
  .countdown__cell span { font-size: 1.5rem; }
  .stamp { display: none; }
}