/* ==========================================================================
   petrkolar.com
   Jedna rodina písma (Archivo, variabilní šířka 62–125 %). Čistá černá,
   bílá a dvě šedé. Výrazný je jen hero s proudnicemi; zbytek je klidný,
   typografický a pohyb reaguje hlavně na to, co dělá návštěvník.
   ========================================================================== */

@font-face {
  font-family: "Archivo";
  font-style: normal;
  font-display: swap;
  font-weight: 100 900;
  font-stretch: 62% 125%;
  src: url("../fonts/archivo-latin-ext-wdth-normal.woff2") format("woff2-variations");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: "Archivo";
  font-style: normal;
  font-display: swap;
  font-weight: 100 900;
  font-stretch: 62% 125%;
  src: url("../fonts/archivo-latin-wdth-normal.woff2") format("woff2-variations");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
  --black: #000000;
  --white: #ffffff;
  --silver: #d0d1d2;
  --grey: #a2a3a5;
  --panel: #14161a;
  --line: #26292f;
  --line-strong: #3a3e45;

  --font: "Archivo", "Helvetica Neue", Arial, sans-serif;

  /* škála ~1.25 */
  --fs-xs: 0.8125rem;
  --fs-sm: 0.875rem;
  --fs-body: clamp(1rem, 0.96rem + 0.2vw, 1.0625rem);
  --fs-md: clamp(1.125rem, 1.04rem + 0.4vw, 1.3125rem);
  --fs-lg: clamp(1.5rem, 1.2rem + 1.2vw, 2.125rem);
  --fs-xl: clamp(2rem, 1.4rem + 2.6vw, 3.5rem);

  --gutter: clamp(1.25rem, 4vw, 3.5rem);
  --max: 1360px;
  --radius: 4px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 4.5rem;
}

body {
  margin: 0;
  background: var(--black);
  color: var(--white);
  font-family: var(--font);
  font-size: var(--fs-body);
  font-stretch: 100%;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; }
h1, h2, h3, p, dl, dd, ul, ol { margin: 0; }
ul, ol { padding: 0; list-style: none; }
button { font: inherit; color: inherit; }

:focus-visible {
  outline: 2px solid var(--white);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 100;
  padding: 0.6rem 1rem;
  background: var(--white);
  color: var(--black);
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 600;
}
.skip:focus { top: 1rem; }

/* --------------------------------------------------------------------------
   Pozadí celé stránky
   -------------------------------------------------------------------------- */
.backdrop {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}
/* tři velká měkká světla, pomalu driftují a při scrollu se posouvají */
.backdrop__lights {
  position: absolute;
  inset: -25vh 0;
  transform: translate3d(0, calc(var(--sp, 0) * -30vh), 0);
}
.backdrop__light {
  position: absolute;
  width: 90vmax;
  height: 90vmax;
  border-radius: 50%;
  will-change: transform;
}
.backdrop__light--a {
  top: -30vmax;
  left: -35vmax;
  background: radial-gradient(closest-side, rgba(150, 168, 196, 0.11), rgba(150, 168, 196, 0.035) 55%, transparent);
  animation: drift-a 46s ease-in-out infinite alternate;
}
.backdrop__light--b {
  top: 35%;
  right: -45vmax;
  background: radial-gradient(closest-side, rgba(255, 255, 255, 0.075), rgba(255, 255, 255, 0.02) 55%, transparent);
  animation: drift-b 58s ease-in-out infinite alternate;
}
.backdrop__light--c {
  bottom: -40vmax;
  left: 10%;
  background: radial-gradient(closest-side, rgba(170, 186, 210, 0.09), rgba(170, 186, 210, 0.025) 55%, transparent);
  animation: drift-c 64s ease-in-out infinite alternate;
}
@keyframes drift-a { to { transform: translate3d(18vw, 14vh, 0) scale(1.1); } }
@keyframes drift-b { to { transform: translate3d(-22vw, -12vh, 0) scale(0.92); } }
@keyframes drift-c { to { transform: translate3d(14vw, -18vh, 0) scale(1.08); } }

.backdrop__lines {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
}
.backdrop__grain {
  position: absolute;
  inset: 0;
  opacity: 0.07;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 .55 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* světlo pod kurzorem v sekcích */
[data-spotlight] {
  position: relative;
  isolation: isolate;
}
[data-spotlight]::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: radial-gradient(560px circle at var(--mx, 50%) var(--my, 50%), rgba(220, 228, 240, 0.065), transparent 65%);
  opacity: 0;
  transition: opacity 0.6s var(--ease);
}
[data-spotlight].is-lit::before { opacity: 1; }

/* společné bloky ----------------------------------------------------------- */
.h2 {
  font-size: var(--fs-xl);
  font-weight: 440;
  line-height: 1.05;
  letter-spacing: -0.03em;
}

/* obsah zarovnaný na stejnou linku jako navigace a hero */
section:not(.hero) {
  --inline: max(var(--gutter), calc((100% - var(--max)) / 2));
  padding: clamp(5rem, 11vw, 9rem) var(--inline);
}

/* --------------------------------------------------------------------------
   Tlačítka
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 11rem;
  height: 2.75rem;
  padding: 0 1.5rem;
  border-radius: var(--radius);
  font-size: var(--fs-sm);
  font-weight: 560;
  text-decoration: none;
  transition: background-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.btn--solid { background: var(--white); color: var(--black); }
.btn--solid:hover { background: var(--silver); }
.btn--glass {
  background: rgba(255, 255, 255, 0.08);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.24);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}
.btn--glass:hover {
  background: rgba(255, 255, 255, 0.16);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.55);
}

/* --------------------------------------------------------------------------
   Navigace
   -------------------------------------------------------------------------- */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: 3.75rem;
  padding: 0 var(--gutter);
  transition: background-color 0.4s var(--ease), box-shadow 0.4s var(--ease);
}
.nav.is-scrolled {
  background: rgba(0, 0, 0, 0.66);
  -webkit-backdrop-filter: saturate(140%) blur(16px);
  backdrop-filter: saturate(140%) blur(16px);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.06);
}
.nav__mark {
  font-size: 0.9375rem;
  font-weight: 620;
  font-stretch: 125%;
  letter-spacing: -0.01em;
  text-decoration: none;
  white-space: nowrap;
}
.nav__links { display: flex; gap: 0.25rem; }
.nav__links a,
.nav__toggle {
  position: relative;
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius);
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--silver);
  text-decoration: none;
  transition: background-color 0.3s var(--ease), color 0.3s var(--ease);
}
.nav__links a:hover { background: rgba(255, 255, 255, 0.1); color: var(--white); }
.nav__links a.is-active { color: var(--white); }
.nav__links a::after {
  content: "";
  position: absolute;
  left: 0.9rem;
  right: 0.9rem;
  bottom: 0.2rem;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transition: transform 0.4s var(--ease);
}
.nav__links a.is-active::after { transform: scaleX(1); }
.nav__toggle {
  display: none;
  border: 0;
  background: rgba(255, 255, 255, 0.1);
  color: var(--white);
  cursor: pointer;
}

.menu {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 5rem var(--gutter) 2.5rem;
  background: rgba(0, 0, 0, 0.94);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
}
.menu[hidden] { display: none; }
.menu nav { display: flex; flex-direction: column; }
.menu nav a {
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--line);
  font-size: var(--fs-lg);
  font-weight: 440;
  letter-spacing: -0.02em;
  text-decoration: none;
}
.menu__close {
  align-self: flex-start;
  min-width: 8rem;
  height: 2.75rem;
  border: 0;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.12);
  font-size: var(--fs-sm);
  cursor: pointer;
}

@media (max-width: 820px) {
  .nav__links { display: none; }
  .nav__toggle { display: inline-flex; }
}

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  display: grid;
  grid-template-rows: 1fr auto;
  min-height: 100vh;
  min-height: 100svh;
  padding: 7rem var(--gutter) 2rem;
  overflow: hidden;
  isolation: isolate;
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(90deg, rgba(0, 0, 0, 0.45), transparent 55%),
    radial-gradient(80% 60% at 30% 45%, rgba(0, 0, 0, 0.35), transparent 70%);
  /* ztmavení se k okraji hero rozplyne, aby nevznikl šev s pozadím stránky */
  -webkit-mask-image: linear-gradient(to bottom, #000 55%, transparent 100%);
  mask-image: linear-gradient(to bottom, #000 55%, transparent 100%);
  pointer-events: none;
}
.hero__flow {
  position: absolute;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
}
.hero__inner {
  align-self: center;
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
}
.hero__who {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 1rem;
  margin-bottom: clamp(1.25rem, 2.5vw, 2rem);
  font-size: var(--fs-sm);
}
.hero__who-name { font-weight: 600; font-stretch: 125%; }
.hero__who-role { color: var(--grey); }

.hero__title {
  max-width: 14em;
  font-size: clamp(2.5rem, 1.3rem + 4.4vw, 5.5rem);
  font-weight: 420;
  line-height: 1.02;
  letter-spacing: -0.035em;
  text-wrap: balance;
}
.hero__lede {
  max-width: 36rem;
  margin-top: clamp(1.5rem, 3vw, 2.25rem);
  font-size: var(--fs-md);
  line-height: 1.5;
  color: var(--silver);
  text-wrap: pretty;
  text-shadow: 0 0 8px #000, 0 0 24px #000;
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2.25rem;
}

/* rozdělený nadpis: slova vyjedou zespodu jedno po druhém */
.w { display: inline-block; overflow: hidden; vertical-align: top; padding-bottom: 0.1em; margin-bottom: -0.1em; }
.w__i {
  display: inline-block;
  transform: translateY(108%);
  transition: transform 1.1s var(--ease);
  transition-delay: calc(var(--i) * 60ms + 150ms);
}
.is-ready .w__i { transform: none; }

[data-reveal] {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 1s var(--ease), transform 1s var(--ease);
}
.is-ready [data-reveal] { opacity: 1; transform: none; }
.is-ready .hero__who { transition-delay: 0.05s; }
.is-ready .hero__lede { transition-delay: 0.75s; }
.is-ready .hero__actions { transition-delay: 0.9s; }
.is-ready .hero__strip { transition-delay: 1.1s; }
.no-js [data-reveal] { opacity: 1; transform: none; }

.hero__strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem;
  width: 100%;
  max-width: var(--max);
  margin: 3.5rem auto 0;
}
.hero__strip li { border-top: 1px solid var(--line-strong); }
.hero__strip a,
.hero__strip li > span:first-child { display: block; }
.hero__strip a,
.hero__strip li:not(:has(a)) {
  padding-top: 1rem;
}
.hero__strip a {
  position: relative;
  text-decoration: none;
}
.hero__strip a::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: -1px;
  height: 1px;
  background: var(--white);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.6s var(--ease);
}
.hero__strip a:hover::before,
.hero__strip a:focus-visible::before { transform: scaleX(1); }
.hero__strip-name {
  display: block;
  font-weight: 600;
  font-stretch: 112%;
}
.hero__strip-desc {
  display: block;
  font-size: var(--fs-sm);
  color: var(--grey);
}

@media (max-width: 640px) {
  .hero { padding-top: 6rem; }
  .hero__strip { grid-template-columns: 1fr 1fr; gap: 1rem; }
  .hero__strip li:last-child { display: none; }
  .hero__actions .btn { flex: 1 1 9rem; min-width: 0; }
}

/* --------------------------------------------------------------------------
   Co dělám
   -------------------------------------------------------------------------- */
.services {
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  gap: clamp(2.5rem, 6vw, 6rem);
  align-items: start;
}
.services__aside {
  position: sticky;
  top: 6.5rem;
}
.services__intro {
  max-width: 30rem;
  margin-top: 1.5rem;
  color: var(--grey);
}
.legend {
  display: flex;
  gap: 0.5rem;
  margin-top: 2rem;
}

.tag {
  display: inline-flex;
  align-items: center;
  height: 1.5rem;
  padding: 0 0.6rem;
  border-radius: 999px;
  font-size: var(--fs-xs);
  font-weight: 520;
  white-space: nowrap;
}
.tag--metrics { box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.5); color: var(--white); }
.tag--viktory { background: rgba(255, 255, 255, 0.14); color: var(--silver); }

.services__list { border-top: 1px solid var(--line); }
.svc { border-bottom: 1px solid var(--line); }
.svc h3 { font: inherit; }
.svc__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto 1.5rem;
  grid-template-areas:
    "name tags icon"
    "short tags icon";
  align-items: center;
  column-gap: 1.5rem;
  width: 100%;
  padding: 1.5rem 0.25rem;
  border: 0;
  background: none;
  text-align: left;
  cursor: pointer;
}
.svc__name {
  grid-area: name;
  font-size: var(--fs-lg);
  font-weight: 440;
  line-height: 1.2;
  letter-spacing: -0.02em;
  transition: transform 0.5s var(--ease);
}
.svc__short {
  grid-area: short;
  margin-top: 0.25rem;
  color: var(--grey);
  font-size: var(--fs-body);
}
.svc__tags { grid-area: tags; display: flex; gap: 0.4rem; justify-content: flex-end; }
.svc__icon {
  grid-area: icon;
  position: relative;
  width: 1.5rem;
  height: 1.5rem;
}
.svc__icon::before,
.svc__icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 14px;
  height: 1.5px;
  background: var(--white);
  transform: translate(-50%, -50%);
  transition: transform 0.5s var(--ease);
}
.svc__icon::after { transform: translate(-50%, -50%) rotate(90deg); }
.svc__head[aria-expanded="true"] .svc__icon::after { transform: translate(-50%, -50%) rotate(0deg); }
.svc__head:hover .svc__name { transform: translateX(0.35rem); }

.svc__panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.55s var(--ease);
}
.svc__panel > .svc__inner { overflow: hidden; }
.svc.is-open .svc__panel { grid-template-rows: 1fr; }
.svc__inner p {
  max-width: 44rem;
  padding: 0 0.25rem;
  color: var(--silver);
}
.svc__deliver {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 1.25rem 0.25rem 1.75rem;
}
.svc__deliver li {
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius);
  background: var(--panel);
  font-size: var(--fs-sm);
  color: var(--silver);
}

@media (max-width: 960px) {
  .services { grid-template-columns: 1fr; }
  .services__aside { position: static; }
}
@media (max-width: 560px) {
  .svc__head {
    grid-template-columns: minmax(0, 1fr) 1.5rem;
    grid-template-areas: "name icon" "short icon" "tags icon";
  }
  .svc__tags { justify-content: flex-start; margin-top: 0.75rem; }
}

/* --------------------------------------------------------------------------
   Firmy
   -------------------------------------------------------------------------- */
.firms__head,
.process__head,
.stack__head {
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  gap: clamp(2.5rem, 6vw, 6rem);
  align-items: end;
}
.firms__intro,
.process__intro,
.stack__intro {
  max-width: 36rem;
  font-size: var(--fs-md);
  line-height: 1.5;
  color: var(--silver);
}
.firms__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(2.5rem, 4vw, 3rem) clamp(1.25rem, 3vw, 2.5rem);
  margin-top: clamp(3rem, 6vw, 4.5rem);
}
.firm {
  display: flex;
  flex-direction: column;
}
.firm__visual {
  position: relative;
  aspect-ratio: 16 / 10;
  border-radius: 14px;
  overflow: hidden;
  background: #000;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.09);
}
.viz {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.viz__label {
  position: absolute;
  bottom: 1rem;
  font-size: var(--fs-xs);
  color: var(--grey);
}
.viz__label--start { left: 1.25rem; }
.viz__label--end { right: 1.25rem; color: var(--silver); }
.firm__body {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  flex: 1;
  padding: 1.75rem 0.25rem 0;
}
.firm__name {
  font-size: var(--fs-lg);
  font-weight: 600;
  font-stretch: 125%;
  letter-spacing: -0.02em;
  line-height: 1.1;
}
.firm__role {
  margin-top: 0.4rem;
  font-size: var(--fs-sm);
  color: var(--grey);
}
.firm__desc {
  max-width: 34rem;
  margin: 1rem 0 1.75rem;
  color: var(--silver);
}
.firm .btn { margin-top: auto; }

@media (max-width: 900px) {
  .firms__head, .process__head, .stack__head { grid-template-columns: 1fr; gap: 1.25rem; }
  .firms__grid { grid-template-columns: 1fr; }
}

/* --------------------------------------------------------------------------
   Postup
   -------------------------------------------------------------------------- */
.process__track {
  position: relative;
  height: 1px;
  margin-top: clamp(3rem, 6vw, 4.5rem);
  background: var(--line);
}
.process__fill {
  position: absolute;
  inset: 0 auto 0 0;
  width: 100%;
  background: var(--white);
  transform: scaleX(var(--p, 0));
  transform-origin: left;
}
.process__steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(1.5rem, 3vw, 3rem);
}
.process__steps li { padding-top: 1.5rem; }
.process__num {
  display: inline-grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  margin-bottom: 1.25rem;
  border-radius: 50%;
  box-shadow: inset 0 0 0 1px var(--line-strong);
  font-size: var(--fs-sm);
  font-weight: 560;
  color: var(--grey);
  transition: background-color 0.4s var(--ease), color 0.4s var(--ease), box-shadow 0.4s var(--ease);
}
.process__steps li.is-reached .process__num {
  background: var(--white);
  color: var(--black);
  box-shadow: none;
}
.process__steps h3 {
  font-size: var(--fs-md);
  font-weight: 560;
  font-stretch: 112%;
}
.process__steps p {
  margin-top: 0.5rem;
  max-width: 22rem;
  color: var(--grey);
}

@media (max-width: 900px) {
  .process__track { display: none; }
  .process__steps { grid-template-columns: 1fr 1fr; margin-top: 2.5rem; }
  .process__steps li { border-top: 1px solid var(--line); }
}
@media (max-width: 520px) {
  .process__steps { grid-template-columns: 1fr; gap: 0; }
  .process__steps li { padding-bottom: 1.5rem; }
}

/* --------------------------------------------------------------------------
   Technologie
   -------------------------------------------------------------------------- */
.stack__grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: clamp(3rem, 6vw, 4.5rem);
  border-top: 1px solid var(--line);
}
.stack__group {
  padding: 1.75rem 1.5rem 0 0;
}
.stack__group dt {
  margin-bottom: 1rem;
  font-weight: 560;
  font-stretch: 112%;
}
.stack__group li {
  padding: 0.25rem 0;
  color: var(--grey);
}
@media (max-width: 900px) {
  .stack__grid { grid-template-columns: 1fr 1fr; row-gap: 1rem; }
}
@media (max-width: 360px) {
  .stack__grid { grid-template-columns: 1fr; }
}

/* --------------------------------------------------------------------------
   Kontakt
   -------------------------------------------------------------------------- */
section.contact {
  overflow: hidden;
  padding-bottom: clamp(7rem, 14vw, 12rem);
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: clamp(2.5rem, 6vw, 6rem);
  align-items: end;
  border-top: 1px solid var(--line);
}
.contact__title {
  max-width: 16em;
  font-size: var(--fs-xl);
  font-weight: 420;
  line-height: 1.08;
  letter-spacing: -0.03em;
  text-wrap: balance;
}
.contact__text {
  max-width: 34rem;
  margin-top: 1.5rem;
  font-size: var(--fs-md);
  line-height: 1.5;
  color: var(--silver);
}
.contact__mail {
  display: block;
  padding: 1.5rem 0;
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  text-decoration: none;
}
.contact__mail-label {
  display: block;
  font-size: var(--fs-sm);
  color: var(--grey);
}
.contact__mail-addr {
  display: inline-block;
  margin-top: 0.25rem;
  font-size: var(--fs-lg);
  font-weight: 440;
  letter-spacing: -0.02em;
  background: linear-gradient(currentColor, currentColor) 0 100% / 0 1px no-repeat;
  transition: background-size 0.6s var(--ease);
}
.contact__mail:hover .contact__mail-addr,
.contact__mail:focus-visible .contact__mail-addr { background-size: 100% 1px; }
.contact__meta {
  display: grid;
  gap: 0.75rem;
  margin-top: 1.5rem;
  font-size: var(--fs-sm);
}
.contact__meta div { display: grid; grid-template-columns: 6rem 1fr; }
.contact__meta dt { color: var(--grey); }
.contact__meta a { text-underline-offset: 3px; text-decoration-color: rgba(255, 255, 255, 0.35); }
.contact__meta a:hover { text-decoration-color: var(--white); }

@media (max-width: 900px) {
  section.contact { grid-template-columns: 1fr; }
}

/* horizont: světlo vycházející zpod konce stránky */
.horizon {
  position: absolute;
  inset: auto 0 0 0;
  height: 70%;
  z-index: -2;
  pointer-events: none;
}
.horizon::before {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -55%;
  width: 150%;
  height: 110%;
  transform: translateX(-50%);
  border-radius: 50%;
  background: radial-gradient(closest-side, rgba(205, 215, 232, 0.2), rgba(205, 215, 232, 0.07) 45%, transparent 75%);
}
.horizon::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.65) 50%, transparent);
  box-shadow: 0 0 24px 2px rgba(220, 228, 240, 0.25);
}

/* --------------------------------------------------------------------------
   Patička
   -------------------------------------------------------------------------- */
.footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  padding: 2rem max(var(--gutter), calc((100% - var(--max)) / 2)) calc(2rem + env(safe-area-inset-bottom));
  border-top: 1px solid var(--line);
  font-size: var(--fs-sm);
  color: var(--grey);
}
.footer__links { display: flex; gap: 1.5rem; }
.footer a { text-decoration: none; }
.footer a:hover { color: var(--white); }

/* --------------------------------------------------------------------------
   Mobil: kompaktnější rytmus, text v hero dole, méně opakování
   -------------------------------------------------------------------------- */
.svc__tags-m { display: none; }

@media (max-width: 640px) {
  section:not(.hero) { padding-top: 4rem; padding-bottom: 4rem; }
  .h2 { font-size: 2.125rem; }

  .nav.is-scrolled { background: rgba(0, 0, 0, 0.86); }

  /* hero: proudnice nahoře volně, text sedí dole nad lištou */
  .hero { padding-top: 5rem; padding-bottom: 1.5rem; }
  .hero__inner { align-self: end; }
  .hero__who-name { display: none; }
  .hero__who { margin-bottom: 1rem; }
  .hero__title { font-size: clamp(2.375rem, 11vw, 3.25rem); line-height: 1.04; }
  .hero__lede { margin-top: 1.25rem; font-size: 1.0625rem; }
  .hero__actions { margin-top: 1.75rem; }
  .hero__strip { margin-top: 2.5rem; }
  .hero::after {
    background:
      linear-gradient(to bottom, transparent 20%, rgba(0, 0, 0, 0.55) 55%, rgba(0, 0, 0, 0.35) 100%);
  }

  /* co dělám: štítky až v rozbaleném panelu, řádky nižší */
  .services { gap: 2rem; }
  .services__intro { margin-top: 1rem; }
  .legend { display: none; }
  .svc__head {
    grid-template-columns: minmax(0, 1fr) 1.5rem;
    grid-template-areas: "name icon" "short icon";
    padding: 1.15rem 0;
  }
  .svc__head .svc__tags { display: none; }
  .svc__name { font-size: 1.375rem; }
  .svc__short { font-size: 0.9375rem; line-height: 1.45; }
  .svc__inner p { padding: 0; font-size: 0.9375rem; }
  .svc__tags-m { display: flex; gap: 0.4rem; margin-bottom: 0.9rem; }
  .svc__deliver { padding: 1rem 0 1.4rem; }
  .svc__head:hover .svc__name { transform: none; }

  /* firmy */
  .firms__grid { gap: 3rem; margin-top: 2rem; }
  .firm__body { padding-top: 1.25rem; }
  .firm .btn { width: 100%; }

  /* postup: číslo vedle nadpisu, bez velkých mezer */
  .process__steps { margin-top: 2rem; }
  .process__steps li {
    display: grid;
    grid-template-columns: 2.75rem 1fr;
    grid-template-areas: "num title" "num text";
    padding: 1.25rem 0;
  }
  .process__num { grid-area: num; margin: 0; }
  .process__steps h3 { grid-area: title; align-self: center; }
  .process__steps p { grid-area: text; margin-top: 0.25rem; }

  /* technologie */
  .stack__grid { margin-top: 2rem; }
  .stack__group { padding: 1.25rem 1rem 0 0; }

  /* kontakt */
  section.contact { gap: 2rem; padding-bottom: 6rem; }
  .contact__mail-addr { font-size: 1.375rem; }

  .btn, .svc__head, .nav__toggle { -webkit-tap-highlight-color: transparent; }
}

/* --------------------------------------------------------------------------
   Méně pohybu
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    transition-delay: 0s !important;
    animation-duration: 0.01ms !important;
  }
  .w__i, [data-reveal] { transform: none; opacity: 1; }
}