/* ============================================================
   LINKWAY — brand foundation
   Tokens, typography, buttons, header, footer, shared bits.
   Colours & fonts straight from the Linkway brandbook.
   ============================================================ */

:root {
  /* ---- Brand palette (brandbook) ---- */
  --lkw-primary: #1D75BC;   /* kobaltowy niebieski — logo, CTA, nagłówki */
  --lkw-primary-d: #155E9B; /* ciemniejszy wariant na hover/aktyw */
  --lkw-accent:  #4BC6E5;   /* błękit/cyjan — ruch, hover, podkreślenia */
  --lkw-ink:     #3C4043;   /* grafit z negatywu */
  --lkw-ink-2:   #2A2D30;   /* głębszy grafit, ciemne sekcje */
  --lkw-bg:      #EAF3FB;   /* chłodne tło sekcji */
  --lkw-bg-2:    #F4F9FE;   /* delikatniejszy tint */
  --lkw-surface: #FFFFFF;
  --lkw-muted:   #5B6B78;   /* tekst pomocniczy */
  --lkw-line:    #DCEAF6;   /* obrysy/linie na jasnym */
  --lkw-line-2:  rgba(255,255,255,.12);

  /* sygnet — gradient niebieski → cyjan */
  --lkw-grad: linear-gradient(120deg, #1D75BC 0%, #4BC6E5 100%);
  --lkw-grad-soft: linear-gradient(120deg, #1D75BC22 0%, #4BC6E522 100%);

  /* ---- Typografia ---- */
  --font-head: 'Quicksand', system-ui, sans-serif;
  --font-body: 'Nunito Sans', system-ui, sans-serif;
  --head-weight: 700;

  /* ---- Skala (clamp, kontrastowa) ---- */
  --fs-eyebrow: .82rem;
  --fs-h1: clamp(2.55rem, 1.6rem + 3.9vw, 4.4rem);
  --fs-h2: clamp(1.95rem, 1.3rem + 2.6vw, 3rem);
  --fs-h3: clamp(1.3rem, 1.05rem + 1.1vw, 1.7rem);
  --fs-lead: clamp(1.1rem, 1rem + .45vw, 1.32rem);
  --fs-body: 1.05rem;
  --fs-small: .92rem;

  /* ---- Promienie / cienie / przestrzeń ---- */
  --r-sm: 10px;
  --r-md: 16px;
  --r-lg: 24px;
  --r-xl: 32px;
  --r-pill: 999px;
  --sh-1: 0 1px 2px rgba(28,60,90,.06), 0 4px 14px rgba(28,60,90,.06);
  --sh-2: 0 8px 24px rgba(28,60,90,.10), 0 2px 6px rgba(28,60,90,.06);
  --sh-3: 0 24px 60px rgba(20,55,90,.16), 0 6px 18px rgba(20,55,90,.08);
  --sh-blue: 0 16px 40px rgba(29,117,188,.30);

  --wrap: 1200px;
  --col-text: 64ch;     /* nigdy ściana tekstu na pełną szerokość */
  --gut: clamp(20px, 5vw, 64px);

  /* ---- Ruch (skalowany Tweakiem) ---- */
  --motion: 1;          /* 0 = off, 1 = normal, 1.4 = żywo */
  --ease: cubic-bezier(.22,.61,.36,1);
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.7;
  color: var(--lkw-ink);
  background: var(--lkw-surface);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: var(--head-weight);
  line-height: 1.08;
  letter-spacing: -.01em;
  color: var(--lkw-ink-2);
  margin: 0 0 .5em;
  text-wrap: balance;
}
h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); letter-spacing: 0; }

p { margin: 0 0 1em; max-width: var(--col-text); text-wrap: pretty; }

a { color: var(--lkw-primary); text-decoration: none; }

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

/* ---- Container ---- */
.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: var(--gut); }

.eyebrow {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: var(--fs-eyebrow);
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--lkw-primary);
  display: inline-flex; align-items: center; gap: .55em;
  margin: 0 0 1.1rem;
}
.eyebrow::before {
  content: ""; width: 26px; height: 2px; border-radius: 2px;
  background: var(--lkw-grad);
}
.eyebrow.on-dark { color: var(--lkw-accent); }

.gradient-text {
  background: var(--lkw-grad);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
}

.lead { font-size: var(--fs-lead); color: var(--lkw-muted); line-height: 1.6; }

/* ---- Buttons ---- */
.btn {
  --_b: var(--lkw-primary);
  display: inline-flex; align-items: center; gap: .6em;
  font-family: var(--font-head); font-weight: 600; font-size: 1rem;
  line-height: 1; padding: .92em 1.5em; border-radius: var(--r-pill);
  border: 1.5px solid transparent; cursor: pointer;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), background .25s, color .25s, border-color .25s;
  white-space: nowrap;
}
.btn svg { width: 1.05em; height: 1.05em; }
.btn-primary {
  color: #fff; background: var(--lkw-primary);
  box-shadow: var(--sh-blue);
}
.btn-primary:hover {
  transform: translateY(calc(-2px * var(--motion)));
  background: var(--lkw-primary-d);
  box-shadow: 0 20px 46px rgba(29,117,188,.42);
}
.btn-gradient { color:#fff; background: var(--lkw-grad); box-shadow: var(--sh-blue); }
.btn-gradient:hover { transform: translateY(calc(-2px * var(--motion))); box-shadow: 0 22px 50px rgba(29,117,188,.45); }
.btn-ghost {
  color: var(--lkw-primary); background: transparent;
  border-color: var(--lkw-line);
}
.btn-ghost:hover { border-color: var(--lkw-primary); background: var(--lkw-bg-2); }
.btn-ghost.on-dark { color:#fff; border-color: var(--lkw-line-2); }
.btn-ghost.on-dark:hover { border-color: var(--lkw-accent); background: rgba(255,255,255,.06); }
.btn-arrow svg { transition: transform .3s var(--ease); }
.btn:hover .btn-arrow svg, .btn.btn-arrow:hover svg { transform: translateX(3px); }

/* ============================================================
   Logo + sygnet
   ============================================================ */
.lkw-logo { display: inline-flex; align-items: center; }
.lkw-mark { height: 30px; width: auto; display: block; }
.lkw-mark.neg { filter: brightness(0) invert(1); }
.tms-side .s-logo img { width: 22px; height: 22px; }

/* ============================================================
   Header / nav
   ============================================================ */
.site-head {
  position: sticky; top: 0; z-index: 60;
  background: rgba(255,255,255,.82);
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s, box-shadow .3s, background .3s;
}
.site-head.scrolled { border-color: var(--lkw-line); box-shadow: 0 6px 24px rgba(28,60,90,.06); }
.nav {
  display: flex; align-items: center; gap: 1.5rem;
  height: 74px;
}
.nav-links { display: flex; align-items: center; gap: 1.9rem; margin-left: 2.4rem; }
.nav-links a {
  font-family: var(--font-head); font-weight: 600; font-size: .98rem;
  color: var(--lkw-ink); position: relative; padding: .3em 0;
}
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: -2px; height: 2px; width: 0;
  background: var(--lkw-grad); border-radius: 2px;
  transition: width .28s var(--ease);
}
.nav-links a:hover { color: var(--lkw-primary); }
.nav-links a:hover::after { width: 100%; }
.nav-cta { display: flex; align-items: center; gap: .7rem; margin-left: auto; padding-left: 1.4rem; border-left: 1px solid var(--lkw-line); }
.nav-login { font-family: var(--font-head); font-weight: 600; color: var(--lkw-ink); }
.nav-login:hover { color: var(--lkw-primary); }
.nav-burger { display: none; }

@media (max-width: 900px) {
  .nav-links, .nav-login { display: none; }
  .nav-burger {
    display: inline-flex; margin-left: auto; width: 44px; height: 44px;
    align-items: center; justify-content: center; border: 1px solid var(--lkw-line);
    border-radius: var(--r-sm); background: #fff; cursor: pointer;
  }
}

/* ============================================================
   Sections
   ============================================================ */
section { position: relative; }
.sec-pad { padding-block: clamp(64px, 9vw, 130px); }
.sec-bg { background: var(--lkw-bg); }
.sec-bg-2 { background: var(--lkw-bg-2); }
.sec-dark { background: var(--lkw-ink-2); color: #E9EDF1; }
.sec-dark h1, .sec-dark h2, .sec-dark h3 { color: #fff; }
.sec-blue { background: var(--lkw-primary); color: #EAF3FB; }
.sec-blue h2, .sec-blue h3 { color:#fff; }

.sec-head { max-width: 720px; margin-bottom: clamp(36px, 5vw, 64px); }
.sec-head.center { margin-inline: auto; text-align: center; }
.sec-head.center .eyebrow { justify-content: center; }
.sec-head p { color: var(--lkw-muted); }
.sec-dark .sec-head p, .sec-blue .sec-head p { color: rgba(255,255,255,.8); }

/* Two-column alternating row: tekst | wizual */
.split {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: clamp(32px, 5vw, 72px); align-items: center;
}
.split.reverse .split-media { order: -1; }
.split-text { max-width: 56ch; }
@media (max-width: 860px) {
  .split { grid-template-columns: 1fr; }
  .split.reverse .split-media { order: 0; }
}

/* ---- Reveal-on-scroll ---- */
.reveal {
  opacity: 0; transform: translateY(26px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
  transition-delay: var(--d, 0ms);
}
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1 !important; transform: none !important; }
  html { scroll-behavior: auto; }
  * { animation: none !important; }
}

/* ---- Reading progress bar ---- */
.read-bar {
  position: fixed; top: 0; left: 0; height: 3px; width: 0%;
  background: var(--lkw-grad); z-index: 100; border-radius: 0 2px 2px 0;
  box-shadow: 0 0 12px rgba(75,198,229,.6);
}

/* ============================================================
   Footer
   ============================================================ */
.site-foot { background: linear-gradient(160deg, #1b67bd 0%, #1d75bc 55%, #2f86d8 100%); color: #b8d4f0; padding-block: clamp(56px, 7vw, 88px) 32px; }
.foot-grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px;
  padding-bottom: 48px; border-bottom: 1px solid rgba(255,255,255,.08);
}
.foot-grid h4 {
  font-size: .8rem; letter-spacing: .14em; text-transform: uppercase;
  color: #fff; margin-bottom: 1.1rem;
}
.foot-grid ul { list-style: none; margin: 0; padding: 0; display: grid; gap: .7rem; }
.foot-grid a { color: #c8dff5; font-size: .96rem; }
.foot-grid a:hover { color: #fff; }
.foot-tag { color: #a8c8e8; max-width: 30ch; margin-top: 1rem; font-size: .96rem; }
.foot-bottom {
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  padding-top: 24px; color: #90bae0; font-size: .88rem;
}
@media (max-width: 760px) { .foot-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 460px) { .foot-grid { grid-template-columns: 1fr; } }

/* ---- Chips ---- */
.chip {
  display: inline-flex; align-items: center; gap: .5em;
  font-family: var(--font-head); font-weight: 600; font-size: .85rem;
  padding: .5em .95em; border-radius: var(--r-pill);
  background: #fff; border: 1px solid var(--lkw-line); color: var(--lkw-ink);
}
.chip .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--lkw-accent); }