/* =========================================================
   HELLIT — design system
   Colors, type, grid, components, motion helpers.
   ========================================================= */

/* -------- tokens -------- */
:root {
  --bg:          #0A0A0A;
  --bg-elev:    #111111;
  --fg:         #F5F1EA;
  --fg-dim:     #A8A8A2;
  --muted:      #6E6E68;
  --accent:     #FF4A1C;
  --accent-dim: #C53B15;
  --line:       rgba(245, 241, 234, 0.12);
  --line-hi:    rgba(245, 241, 234, 0.28);

  --ff-display: "Space Grotesk", ui-sans-serif, system-ui, sans-serif;
  --ff-body:    "Inter", ui-sans-serif, system-ui, sans-serif;
  --ff-mono:    "JetBrains Mono", ui-monospace, SFMono-Regular, monospace;

  --fs-micro:   0.75rem;
  --fs-xs:      0.875rem;
  --fs-s:       1rem;
  --fs-m:       1.125rem;
  --fs-l:       1.375rem;
  --fs-xl:      clamp(2rem, 3.2vw, 3.25rem);
  --fs-2xl:     clamp(3rem, 5.5vw, 6rem);
  --fs-3xl:     clamp(4rem, 11vw, 11rem);
  --fs-4xl:     clamp(2.75rem, 12vw, 10.5rem);

  --space-1:    0.5rem;
  --space-2:    1rem;
  --space-3:    1.5rem;
  --space-4:    2rem;
  --space-5:    3rem;
  --space-6:    5rem;
  --space-7:    8rem;
  --space-8:    12rem;

  --max:        1440px;
  --gutter:     clamp(1.25rem, 3vw, 2.5rem);
  --radius:     2px;

  --ease:       cubic-bezier(0.22, 1, 0.36, 1);
  --ease-expo:  cubic-bezier(0.16, 1, 0.3, 1);
}

/* -------- reset -------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: auto; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--ff-body);
  font-size: var(--fs-s);
  line-height: 1.55;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  cursor: none;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: none; }
::selection { background: var(--accent); color: var(--bg); }

/* -------- grain overlay -------- */
.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9;
  opacity: 0.06;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='240' height='240'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
}

/* -------- custom cursor -------- */
.cursor {
  position: fixed;
  top: 0; left: 0;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  pointer-events: none;
  z-index: 10000;
  transform: translate(-50%, -50%);
  opacity: 0;
  transition: opacity .3s var(--ease), width .25s var(--ease), height .25s var(--ease), background .25s var(--ease);
  mix-blend-mode: difference;
}
.cursor.is-visible { opacity: 1; }
.cursor.is-hover {
  width: 48px; height: 48px;
  background: var(--fg);
}
@media (hover: none), (pointer: coarse) {
  body { cursor: auto; }
  .cursor { display: none; }
  button, a { cursor: pointer; }
}

/* -------- language toggle -------- */
html.lang-en .lang-cs { display: none !important; }
html.lang-cs .lang-en { display: none !important; }

/* -------- layout -------- */
.shell {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.section {
  padding: var(--space-7) 0;
  position: relative;
}
.section--tight { padding: var(--space-6) 0; }
.section + .section { border-top: 1px solid var(--line); }

/* -------- type -------- */
.eyebrow {
  font-family: var(--ff-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}
.eyebrow .num {
  color: var(--fg-dim);
  margin-right: 1ch;
}
.display {
  font-family: var(--ff-display);
  font-weight: 700;
  line-height: 0.92;
  letter-spacing: -0.035em;
  font-feature-settings: "ss01", "cv11";
}
.display--hero {
  font-size: var(--fs-4xl);
}
.display--xl {
  font-size: var(--fs-3xl);
}
.display--l {
  font-size: var(--fs-2xl);
}
.display--m {
  font-size: var(--fs-xl);
  letter-spacing: -0.02em;
}
.lead {
  font-size: var(--fs-l);
  color: var(--fg-dim);
  max-width: 60ch;
  line-height: 1.45;
}
.body {
  font-size: var(--fs-s);
  color: var(--fg-dim);
  max-width: 60ch;
}
.mono {
  font-family: var(--ff-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-dim);
}

/* -------- nav -------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: var(--space-3) var(--gutter);
  display: flex;
  justify-content: space-between;
  align-items: center;
  mix-blend-mode: difference;
  color: var(--fg);
}
.nav__logo {
  font-family: var(--ff-display);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  display: flex;
  align-items: baseline;
  gap: 0.25rem;
}
.nav__logo-dot {
  width: 0.5rem; height: 0.5rem;
  background: var(--accent);
  border-radius: 50%;
  display: inline-block;
  transform: translateY(-0.15rem);
}
.nav__links {
  display: flex;
  gap: var(--space-3);
  font-family: var(--ff-mono);
  font-size: var(--fs-micro);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}
.nav__links a {
  opacity: 0.75;
  transition: opacity .2s var(--ease);
}
.nav__links a:hover { opacity: 1; }
@media (max-width: 720px) {
  .nav__links { display: none; }
}
.lang-toggle {
  font-family: var(--ff-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  display: inline-flex;
  gap: 0.4ch;
}
.lang-toggle span {
  opacity: 0.35;
  transition: opacity .2s var(--ease);
}
.lang-toggle span.is-active { opacity: 1; color: var(--accent); }
.lang-toggle .sep { opacity: 0.35; }

/* -------- hero -------- */
.hero {
  min-height: 100vh;
  padding: 0 var(--gutter);
  padding-top: var(--space-7);
  padding-bottom: var(--space-5);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
}
.hero__meta {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-4);
  margin-top: var(--space-4);
}
.hero__meta small {
  font-family: var(--ff-mono);
  font-size: var(--fs-micro);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--fg-dim);
  display: block;
}
.hero__title {
  margin-top: auto;
  margin-bottom: var(--space-3);
}
.hero__title .line {
  display: block;
  overflow: hidden;
  white-space: nowrap;
}
.hero__title .line > span {
  display: inline-block;
  will-change: transform;
}
.hero__title .accent { color: var(--accent); }
.hero__title .strike {
  text-decoration: line-through;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 0.08em;
}

.hero__sub {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  align-items: end;
  border-top: 1px solid var(--line);
  padding-top: var(--space-3);
}
@media (max-width: 760px) {
  .hero__sub { grid-template-columns: 1fr; gap: var(--space-3); }
}
.hero__sub p {
  color: var(--fg-dim);
  max-width: 48ch;
  font-size: var(--fs-m);
}

.scroll-hint {
  position: absolute;
  bottom: var(--space-3);
  right: var(--gutter);
  font-family: var(--ff-mono);
  font-size: var(--fs-micro);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--fg-dim);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  writing-mode: vertical-rl;
}
.scroll-hint::after {
  content: "";
  width: 1px;
  height: 48px;
  background: var(--fg-dim);
  display: block;
  animation: scroll-bar 2s var(--ease) infinite;
}
@keyframes scroll-bar {
  0%   { transform: scaleY(0); transform-origin: top; }
  50%  { transform: scaleY(1); transform-origin: top; }
  51%  { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* -------- manifesto -------- */
.manifesto {
  padding: var(--space-7) 0;
  border-top: 1px solid var(--line);
}
.manifesto p {
  font-family: var(--ff-display);
  font-weight: 500;
  font-size: var(--fs-xl);
  line-height: 1.18;
  letter-spacing: -0.02em;
  max-width: 22ch;
  color: var(--fg);
}
.manifesto p .em { color: var(--accent); }
.manifesto .body { margin-top: var(--space-4); max-width: 50ch; }

/* -------- section heading -------- */
.section__head {
  display: grid;
  grid-template-columns: minmax(12rem, 1fr) 3fr;
  gap: var(--space-4);
  padding-bottom: var(--space-5);
  align-items: start;
}
@media (max-width: 760px) {
  .section__head { grid-template-columns: 1fr; gap: var(--space-2); }
}
.section__head .eyebrow { padding-top: 0.7rem; }

/* -------- services grid -------- */
.services {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
@media (max-width: 980px) { .services { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .services { grid-template-columns: 1fr; } }

.service {
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: var(--space-4);
  min-height: 22rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
  transition: background .4s var(--ease);
}
.service::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--accent);
  transform: translateY(100%);
  transition: transform .5s var(--ease-expo);
  z-index: 0;
}
.service:hover::before { transform: translateY(0); }
.service:hover { color: var(--bg); }
.service > * { position: relative; z-index: 1; }
.service__num {
  font-family: var(--ff-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.12em;
  color: var(--fg-dim);
  transition: color .4s var(--ease);
}
.service:hover .service__num { color: var(--bg); }
.service__title {
  font-family: var(--ff-display);
  font-weight: 700;
  font-size: 1.875rem;
  letter-spacing: -0.02em;
  line-height: 1.05;
  margin-top: var(--space-2);
}
.service__desc {
  margin-top: var(--space-2);
  color: var(--fg-dim);
  font-size: var(--fs-s);
  max-width: 32ch;
  transition: color .4s var(--ease);
}
.service:hover .service__desc { color: rgba(10,10,10,0.85); }
.service__tags {
  margin-top: var(--space-3);
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.5rem;
  font-family: var(--ff-mono);
  font-size: var(--fs-micro);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--fg-dim);
  transition: color .4s var(--ease);
}
.service:hover .service__tags { color: rgba(10,10,10,0.85); }

/* -------- process -------- */
.process {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-3);
}
@media (max-width: 900px) { .process { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .process { grid-template-columns: 1fr; } }
.step {
  padding: var(--space-4) 0;
  border-top: 1px solid var(--line);
}
.step__n {
  font-family: var(--ff-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.12em;
  color: var(--accent);
}
.step__title {
  font-family: var(--ff-display);
  font-weight: 700;
  font-size: 1.625rem;
  letter-spacing: -0.02em;
  margin-top: var(--space-2);
}
.step__desc {
  margin-top: var(--space-2);
  color: var(--fg-dim);
  font-size: var(--fs-s);
  max-width: 32ch;
}

/* -------- numbers -------- */
.numbers {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-3);
  padding: var(--space-5) 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
@media (max-width: 820px) { .numbers { grid-template-columns: repeat(2, 1fr); } }
.stat__num {
  font-family: var(--ff-display);
  font-weight: 700;
  font-size: clamp(3.5rem, 7vw, 6rem);
  line-height: 0.9;
  letter-spacing: -0.04em;
}
.stat__num .plus { color: var(--accent); }
.stat__label {
  font-family: var(--ff-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin-top: var(--space-2);
}

/* -------- marquee -------- */
.marquee {
  overflow: hidden;
  padding: var(--space-4) 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}
.marquee__track {
  display: inline-flex;
  gap: var(--space-5);
  animation: marquee 38s linear infinite;
  font-family: var(--ff-display);
  font-weight: 700;
  font-size: clamp(2.5rem, 5vw, 5rem);
  letter-spacing: -0.02em;
}
.marquee__track .dot {
  width: 0.35em; height: 0.35em;
  background: var(--accent);
  border-radius: 50%;
  display: inline-block;
  align-self: center;
}
@keyframes marquee {
  to { transform: translateX(-50%); }
}
.marquee:hover .marquee__track { animation-play-state: paused; }

/* -------- stack grid -------- */
.stack {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
}
@media (max-width: 900px) { .stack { grid-template-columns: repeat(2, 1fr); } }
.stack__col h4 {
  font-family: var(--ff-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-2);
}
.stack__col ul { list-style: none; }
.stack__col li {
  font-size: var(--fs-m);
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--line);
  transition: color .2s var(--ease);
}
.stack__col li:hover { color: var(--accent); }

/* -------- work / cases -------- */
.cases {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}
.case {
  display: grid;
  grid-template-columns: 4rem 1fr 2fr auto;
  gap: var(--space-3);
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--line);
  align-items: center;
  transition: padding-left .4s var(--ease), color .4s var(--ease);
  cursor: none;
}
.case:hover { padding-left: 1.5rem; color: var(--accent); }
.case__n { font-family: var(--ff-mono); font-size: var(--fs-micro); color: var(--fg-dim); letter-spacing: 0.12em; }
.case__client { font-family: var(--ff-display); font-weight: 700; font-size: clamp(1.5rem, 3vw, 2.25rem); letter-spacing: -0.02em; line-height: 1; }
.case__desc { color: var(--fg-dim); font-size: var(--fs-s); max-width: 42ch; }
.case:hover .case__desc { color: currentColor; opacity: 0.7; }
.case__arrow {
  width: 2rem; height: 2rem;
  display: grid; place-items: center;
  border: 1px solid var(--line-hi);
  border-radius: 50%;
  transition: background .3s var(--ease), border-color .3s var(--ease);
}
.case:hover .case__arrow { background: var(--accent); border-color: var(--accent); color: var(--bg); }
@media (max-width: 760px) {
  .case { grid-template-columns: 3rem 1fr auto; }
  .case__desc { display: none; }
}

/* -------- about -------- */
.about {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
  align-items: start;
}
@media (max-width: 820px) { .about { grid-template-columns: 1fr; gap: var(--space-3); } }
.about p { font-size: var(--fs-l); line-height: 1.45; color: var(--fg); max-width: 46ch; }
.about p + p { margin-top: var(--space-3); color: var(--fg-dim); font-size: var(--fs-m); }

/* -------- contact -------- */
.contact {
  padding: var(--space-8) 0 var(--space-7);
  border-top: 1px solid var(--line);
  position: relative;
}
.contact__kicker {
  font-family: var(--ff-display);
  font-weight: 500;
  font-size: var(--fs-2xl);
  line-height: 0.95;
  letter-spacing: -0.03em;
  max-width: 14ch;
}
.contact__kicker .em { color: var(--accent); }
.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-top: var(--space-5);
  padding-top: var(--space-4);
  border-top: 1px solid var(--line);
}
@media (max-width: 760px) { .contact__grid { grid-template-columns: 1fr; gap: var(--space-3); } }
.contact__block h5 {
  font-family: var(--ff-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin-bottom: var(--space-2);
}
.contact__block a, .contact__block address {
  font-family: var(--ff-display);
  font-style: normal;
  font-weight: 500;
  font-size: var(--fs-l);
  letter-spacing: -0.01em;
  display: inline-block;
  position: relative;
}
.contact__block a::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0.05em;
  height: 1px;
  background: currentColor;
  transform-origin: right;
  transform: scaleX(1);
  transition: transform .4s var(--ease-expo);
}
.contact__block a:hover::after { transform-origin: left; transform: scaleX(0); }

.cta {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  padding: 1.1rem 1.6rem 1.1rem 1.8rem;
  border: 1px solid var(--fg);
  border-radius: 999px;
  font-family: var(--ff-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  overflow: hidden;
  position: relative;
  transition: color .3s var(--ease);
}
.cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--accent);
  transform: translateY(100%);
  transition: transform .4s var(--ease-expo);
  z-index: 0;
}
.cta:hover::before { transform: translateY(0); }
.cta:hover { color: var(--bg); border-color: var(--accent); }
.cta > * { position: relative; z-index: 1; }
.cta__arrow {
  width: 1.5rem; height: 1.5rem;
  border-radius: 50%;
  background: var(--accent);
  display: grid; place-items: center;
  color: var(--bg);
  transition: background .3s var(--ease);
}
.cta:hover .cta__arrow { background: var(--bg); color: var(--accent); }

/* -------- footer -------- */
.foot {
  padding: var(--space-3) var(--gutter);
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  flex-wrap: wrap;
  font-family: var(--ff-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-dim);
}

/* -------- reveal helpers (GSAP hooks) -------- */
.reveal { opacity: 0; transform: translateY(2rem); }
.split-word { display: inline-block; overflow: hidden; }
.split-word > span { display: inline-block; will-change: transform; }

/* -------- reduced motion -------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .marquee__track { animation: none; }
  .reveal { opacity: 1; transform: none; }
}