/* =====================================================================
   BASE — reset, tipografija, fokus, pozadinski sistem, reveal osnove
   ===================================================================== */

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 100px;     /* sticky header ne prekriva ciljanu sekciju */
}

body {
  font-family: var(--f-body);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--c-ink);
  background: var(--c-bg);
  min-height: 100svh;
  overflow-x: clip;              /* nikada horizontalni skrol */
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-variant-ligatures: common-ligatures;
}

img, svg, video { display: block; max-width: 100%; }
img { height: auto; }
ul, ol { list-style: none; padding: 0; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; cursor: pointer; }
:where(h1, h2, h3, h4) { font-family: var(--f-head); letter-spacing: var(--ls-head); line-height: var(--lh-head); font-weight: 700; }
kbd {
  font: 600 .78em var(--f-head); background: var(--c-surface-2); border: 1px solid var(--c-line);
  border-bottom-width: 2px; border-radius: 6px; padding: .1em .45em;
}
code { font-family: ui-monospace, "Cascadia Code", "SFMono-Regular", Consolas, monospace; font-size: .92em; }
::selection { background: var(--a-teal-soft); color: var(--a-teal-ink); }

/* ---------- FOKUS: uvijek vidljiv, nikad uklonjen ---------- */
:focus { outline: none; }
:focus-visible {
  outline: 3px solid var(--a-sky-ink);
  outline-offset: 3px;
  border-radius: var(--r-xs);
}

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap;
}

.skip-link {
  position: fixed; top: -100px; left: var(--gutter); z-index: 100;
  background: var(--c-ink); color: var(--c-ink-inv);
  padding: .85rem 1.35rem; border-radius: var(--r-sm);
  font-weight: 600; box-shadow: var(--sh-3);
  transition: top var(--motion-fast) var(--ease-out);
}
.skip-link:focus-visible { top: 14px; }

.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }
.sprite symbol { fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.sprite symbol[id^="f-"] { stroke-width: 3.2; }
.sprite .f-fill { fill: currentColor; stroke: none; opacity: .18; }
.sprite .f-line { fill: none; stroke: currentColor; }

/* ---------- LAYOUT PRIMITIVE ---------- */
.shell {
  width: min(100% - (var(--gutter) * 2), var(--shell));
  margin-inline: auto;
}
.section { position: relative; padding-block: var(--sec-y); }
/* Nevidljivi link preko cijele kartice. Mora biti apsolutno pozicioniran
   da ne postane grid/flex stavka roditelja. */
.stretch { position: absolute; inset: 0; z-index: 3; }

/* =====================================================================
   POZADINSKI SISTEM — 5 slojeva, svi GPU-jeftini (bez blur filtera
   preko velikih površina osim statičnih blob-ova)
   ===================================================================== */
.bg-system {
  position: fixed; inset: 0; z-index: var(--z-bg);
  pointer-events: none; overflow: hidden;
  background: var(--c-bg);
}

/* 1 — pastelni gradient mesh */
.bg-mesh {
  position: absolute; inset: -12%;
  background:
    radial-gradient(48% 42% at 14% 12%, rgba(18,166,172,.22), transparent 62%),
    radial-gradient(44% 40% at 88% 8%,  rgba(126,108,222,.18), transparent 64%),
    radial-gradient(52% 46% at 78% 62%, rgba(55,133,218,.16), transparent 66%),
    radial-gradient(40% 38% at 8% 72%,  rgba(47,177,131,.16), transparent 64%),
    radial-gradient(46% 40% at 50% 100%, rgba(242,106,95,.13), transparent 66%);
  animation: meshDrift 46s var(--ease-standard) infinite alternate;
}
@keyframes meshDrift {
  0%   { transform: translate3d(0,0,0) scale(1); }
  50%  { transform: translate3d(-1.6%, 1.2%, 0) scale(1.045); }
  100% { transform: translate3d(1.4%, -1%, 0) scale(1.02); }
}

/* 2 — vrlo diskretna mreža */
.bg-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, rgba(23,41,58,.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(23,41,58,.045) 1px, transparent 1px);
  background-size: 84px 84px;
  mask-image: radial-gradient(120% 90% at 50% 0%, #000 8%, transparent 78%);
}

/* 3 — tačkice */
.bg-dots {
  position: absolute; inset: 0;
  background-image: radial-gradient(rgba(23,41,58,.10) 1.1px, transparent 1.1px);
  background-size: 28px 28px;
  mask-image: radial-gradient(90% 70% at 82% 84%, #000 0%, transparent 70%);
  opacity: .6;
}

/* 4 — matematičke/organske linije */
.bg-lines {
  position: absolute; inset: 0; width: 100%; height: 100%;
  fill: none; stroke: rgba(23,41,58,.09); stroke-width: 1.25;
}

/* 5 — veliki organski oblici koji prelaze između sekcija */
.bg-blob {
  position: absolute; display: block;
  border-radius: var(--r-organic);
  filter: blur(46px);
  opacity: .5;
  will-change: transform;
}
.bg-blob--1 { width: 46vw; height: 40vw; left: -14vw; top: 4vh;  background: rgba(18,166,172,.34);  animation: blobA 26s var(--ease-standard) infinite alternate; }
.bg-blob--2 { width: 40vw; height: 36vw; right: -12vw; top: 26vh; background: rgba(126,108,222,.28); animation: blobB 32s var(--ease-standard) infinite alternate; }
.bg-blob--3 { width: 34vw; height: 32vw; left: 24vw; bottom: -12vh; background: rgba(245,185,63,.24); animation: blobA 29s var(--ease-standard) infinite alternate-reverse; }
.bg-blob--4 { width: 30vw; height: 28vw; right: 8vw; bottom: 6vh;  background: rgba(47,177,131,.24);  animation: blobB 35s var(--ease-standard) infinite alternate-reverse; }
@keyframes blobA { from { transform: translate3d(0,0,0) rotate(0deg); } to { transform: translate3d(3%, -4%, 0) rotate(14deg); } }
@keyframes blobB { from { transform: translate3d(0,0,0) rotate(0deg); } to { transform: translate3d(-4%, 3%, 0) rotate(-12deg); } }

/* Cursor glow — samo desktop, uključuje ga JS */
.cursor-glow {
  position: fixed; top: 0; left: 0; z-index: var(--z-base);
  width: 460px; height: 460px; margin: -230px 0 0 -230px;
  border-radius: 50%; pointer-events: none; opacity: 0;
  background: radial-gradient(circle, rgba(18,166,172,.16), transparent 66%);
  transition: opacity var(--motion-slow) var(--ease-out);
  will-change: transform;
}
.has-glow .cursor-glow { opacity: 1; }

main, .site-header, .site-footer { position: relative; z-index: var(--z-base); }

/* =====================================================================
   SCROLL PROGRESS
   ===================================================================== */
.scroll-progress {
  position: fixed; top: 0; left: 0; right: 0; height: 3px;
  z-index: calc(var(--z-header) + 1); pointer-events: none;
}
.scroll-progress__bar {
  display: block; height: 100%; width: 100%;
  transform: scaleX(0); transform-origin: 0 50%;
  background: var(--grad-brand);
  will-change: transform;
}

/* =====================================================================
   REVEAL — sadržaj je vidljiv bez JS-a; sakriva se SAMO kad JS radi
   ===================================================================== */
.js .reveal:not([data-stagger]),
.js .reveal[data-stagger] > * {
  opacity: 0;
  transform: translate3d(0, var(--reveal-y), 0);
  transition:
    opacity var(--motion-slow) var(--ease-out),
    transform var(--motion-slow) var(--ease-out);
}
.js .reveal.is-in:not([data-stagger]),
.js .reveal[data-stagger].is-in > * { opacity: 1; transform: none; }

/* Stagger: djeca dobijaju --i indeks iz JS-a */
.js .reveal[data-stagger].is-in > * { transition-delay: calc(var(--i, 0) * var(--stagger)); }

/* Intro sekvenca hero-a */
.js [data-intro] {
  opacity: 0;
  transform: translate3d(0, 18px, 0);
}
.js .is-ready [data-intro] {
  animation: introIn var(--motion-scene) var(--ease-out) forwards;
  animation-delay: calc(var(--intro-d, 0ms));
}
@keyframes introIn { to { opacity: 1; transform: none; } }
/* Kad se intro završi animacija se gasi da bi parallax (inline transform) radio */
.js [data-intro].intro-done { animation: none; opacity: 1; transform: none; }

/* =====================================================================
   TIPOGRAFSKI POMOĆNICI
   ===================================================================== */
.eyebrow {
  display: flex; align-items: center; gap: .75rem;
  font-family: var(--f-head); font-size: var(--fs-xs); font-weight: 700;
  letter-spacing: var(--ls-eyebrow); text-transform: uppercase;
  color: var(--acc-ink); margin-bottom: var(--s-3);
}
.eyebrow--center { justify-content: center; }
.eyebrow__line { display: block; width: 34px; height: 2px; border-radius: 2px; background: var(--acc); opacity: .55; }

.sec-title { font-size: var(--fs-h2); max-width: 20ch; text-wrap: balance; }
.sec-title--sm { font-size: var(--fs-h3); }
.sec-lead { font-size: var(--fs-lead); color: var(--c-ink-soft); max-width: 62ch; margin-top: var(--s-4); }

.sec-head { margin-bottom: clamp(2rem, 4vw, 3.5rem); }
.sec-head--row { display: flex; align-items: flex-end; justify-content: space-between; gap: var(--s-5); flex-wrap: wrap; }
.sec-head--center { text-align: center; }
.sec-head--center .sec-title, .sec-head--center .sec-lead { margin-inline: auto; }

.grad-text {
  font-style: normal;
  background: var(--grad-text);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
}
@supports not (background-clip: text) { .grad-text { color: var(--a-teal-ink); } }

/* Display brojevi — treća, upečatljivija familija (Unbounded) */
.num {
  font-family: var(--f-display); font-weight: 800;
  letter-spacing: -.045em;
  font-variant-numeric: tabular-nums lining-nums;
}