/* UKÁZKA - web servisní firmy na kompresory. Pracovní název VZDUŠNÍK.
   Konceit: tlak v soustavě. Kontrakt: ../_spec/DESIGN.md (prostředí strojovna). */

:root {
  --graphite: #16191b;
  --graphite-2: #1e2326;
  --graphite-3: #262c30;
  --bone: #e8e4da;
  --steel: #8a959b;
  --line: #394247;
  --petrol: #2a8a99;
  --amber: #e0952a;
  --alarm: #c4432b;

  --display: "Barlow Condensed", "Arial Narrow", sans-serif;
  --text: "IBM Plex Sans", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;

  --gut: clamp(1.15rem, 4vw, 3.5rem);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--graphite);
  color: var(--bone);
  font-family: var(--text);
  font-size: 1.0625rem;
  line-height: 1.62;
  overflow-x: hidden;
}

.wrap { max-width: 76rem; margin: 0 auto; padding: 0 var(--gut); }

a { color: var(--amber); }
:focus-visible { outline: 2px solid var(--amber); outline-offset: 3px; }

h1, h2, h3 {
  font-family: var(--display);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .02em;
  line-height: 1.03;
  margin: 0;
}

.eyebrow {
  font-family: var(--mono);
  font-size: .7rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--amber);
}

/* ---------- Pruh ukázky ---------- */

.ribbon {
  background: var(--amber);
  color: #14181a;
  font-family: var(--mono);
  font-size: .74rem;
  line-height: 1.5;
  letter-spacing: .02em;
  padding: .5rem var(--gut);
  text-align: center;
}
.ribbon b { text-transform: uppercase; letter-spacing: .1em; }

/* ---------- Hlavička ---------- */

.top {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(22, 25, 27, .93);
  border-bottom: 1px solid var(--line);
  backdrop-filter: saturate(1.2) blur(6px);
}
.top__in {
  max-width: 76rem;
  margin: 0 auto;
  padding: .55rem var(--gut);
  display: flex;
  align-items: center;
  gap: 1rem;
}

.brand { display: flex; align-items: center; gap: .6rem; text-decoration: none; color: var(--bone); }
.brand svg { width: 34px; height: 34px; display: block; flex: none; }
.brand__name {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.32rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  border-top: 1px solid var(--steel);
  border-bottom: 1px solid var(--steel);
  padding: .08em 0 .02em;
  line-height: 1.1;
}

.nav { margin-left: auto; display: flex; align-items: center; gap: 1.4rem; }
.nav a {
  font-family: var(--mono);
  font-size: .78rem;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--steel);
  text-decoration: none;
}
.nav a:hover { color: var(--bone); }

.nav a.callbtn, .callbtn {
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.06rem;
  letter-spacing: .06em;
  text-transform: uppercase;
  background: var(--amber);
  color: #14181a;
  text-decoration: none;
  padding: .42rem 1rem;
  border: 1px solid #14181a;
  box-shadow: 3px 3px 0 rgba(224, 149, 42, .28);
  white-space: nowrap;
}
.callbtn:hover { background: var(--bone); }

.burger {
  margin-left: auto;
  display: none;
  width: 42px; height: 38px;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--bone);
  cursor: pointer;
  padding: 0;
}
.burger span { display: block; width: 18px; height: 2px; background: currentColor; margin: 3.5px auto; }

.drawer {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  background: var(--graphite);
  z-index: 50;
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: .4rem;
  padding: var(--gut);
}
.drawer.open { display: flex; }
.drawer a {
  font-family: var(--display);
  font-size: 2rem;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--bone);
  text-decoration: none;
  padding: .35rem 0;
  border-bottom: 1px solid var(--line);
}
.drawer__close {
  position: absolute;
  top: 1rem; right: var(--gut);
  background: none; border: 1px solid var(--line); color: var(--bone);
  font-family: var(--mono); font-size: 1.1rem; width: 42px; height: 38px; cursor: pointer;
}

/* ---------- Hrdina: soustava ---------- */

.hero { padding: clamp(1.75rem, 5vw, 3.5rem) 0 clamp(2rem, 5vw, 3.5rem); }

.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 20rem) minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3.25rem);
  align-items: center;
}

.hero__copy h1 {
  font-size: clamp(1.95rem, 8vw, 4.6rem);
  margin: .45rem 0 .8rem;
  overflow-wrap: break-word;
}
.hero__copy h1 em { font-style: normal; color: var(--amber); display: block; }
.hero__copy p { color: var(--steel); max-width: 30rem; margin: 0 0 1.25rem; }
.hero__actions { display: flex; flex-wrap: wrap; gap: .7rem 1rem; align-items: center; }

/* Manometr */

.gauge { width: 100%; max-width: 20rem; display: block; margin: 0 auto; }
.gauge .face { fill: var(--graphite-2); }
.gauge .ring { fill: none; stroke: var(--line); stroke-width: 6; }
.gauge .tick { stroke: var(--steel); stroke-width: 2; }
.gauge .tick--mj { stroke: var(--bone); stroke-width: 3; }
.gauge .num { fill: var(--steel); font-family: var(--mono); font-size: 15px; text-anchor: middle; dominant-baseline: middle; }
.gauge .band-ok { fill: none; stroke: var(--petrol); stroke-width: 7; stroke-linecap: butt; }
.gauge .band-hi { fill: none; stroke: var(--alarm); stroke-width: 7; stroke-linecap: butt; }
.gauge .cap { fill: var(--graphite-3); stroke: var(--steel); stroke-width: 3; }
.gauge .read { fill: var(--amber); font-family: var(--mono); font-size: 30px; font-weight: 500; text-anchor: middle; }
.gauge .unit { fill: var(--steel); font-family: var(--mono); font-size: 13px; letter-spacing: 2px; text-anchor: middle; }
.gauge .where { fill: var(--bone); font-family: var(--display); font-size: 19px; font-weight: 600; letter-spacing: 1.5px; text-anchor: middle; }

.needle { transform-box: view-box; transform-origin: 160px 160px; transform: rotate(calc(var(--a, 57.2) * 1deg)); }
@media (prefers-reduced-motion: no-preference) {
  .needle { transition: transform .5s cubic-bezier(.22, .9, .26, 1); }
}
.needle path { fill: var(--amber); }
.needle .tail { fill: var(--steel); }

.gauge.is-leak .read { fill: var(--alarm); }
.gauge.is-leak .needle-j { animation: waver .28s linear infinite; }
@keyframes waver { 0%, 100% { transform: rotate(-1.6deg); } 50% { transform: rotate(1.6deg); } }
@media (prefers-reduced-motion: reduce) { .gauge.is-leak .needle-j { animation: none; } }
.needle-j { transform-box: view-box; transform-origin: 160px 160px; }

/* Soustava: potrubí a uzly */

.circuit { position: relative; padding: 2.4rem 0 .5rem; }
.circuit::before {
  content: "";
  position: absolute;
  left: 0; right: 0; top: 3.55rem;
  height: 6px;
  background:
    repeating-linear-gradient(90deg, var(--line) 0 1px, transparent 1px 18px) center/auto 100% no-repeat,
    var(--graphite-3);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.nodes { display: flex; gap: .5rem; margin: 0; padding: 0; list-style: none; position: relative; }
.nodes li { flex: 1 1 0; min-width: 0; }

.node {
  width: 100%;
  background: transparent;
  border: 0;
  padding: 0 0 .5rem;
  cursor: pointer;
  color: inherit;
  font: inherit;
  text-align: center;
  display: block;
}
.node__dot {
  width: 26px; height: 26px;
  margin: 0 auto .55rem;
  border-radius: 50%;
  background: var(--graphite);
  border: 4px solid var(--line);
  display: block;
  transition: border-color .2s, background .2s, transform .2s;
}
.node__name {
  display: block;
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.02rem;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--steel);
  transition: color .2s;
}
.node__val {
  display: block;
  font-family: var(--mono);
  font-size: .74rem;
  color: var(--line);
  transition: color .2s;
}
.node:hover .node__dot, .node:focus-visible .node__dot { border-color: var(--petrol); transform: scale(1.12); }
.node:hover .node__name, .node:focus-visible .node__name { color: var(--bone); }

.node.is-on .node__dot { border-color: var(--amber); background: var(--amber); }
.node.is-on .node__name { color: var(--bone); }
.node.is-on .node__val { color: var(--amber); }
.node.is-on.is-leak .node__dot { border-color: var(--alarm); background: var(--alarm); }
.node.is-on.is-leak .node__val { color: var(--alarm); }

.readout {
  margin: .9rem 0 0;
  min-height: 4.5rem;
  border-left: 3px solid var(--amber);
  padding: .1rem 0 .1rem 1rem;
}
.readout p { margin: 0; color: var(--steel); max-width: 44rem; }
.readout b { color: var(--bone); font-weight: 600; }
.readout.is-leak { border-left-color: var(--alarm); }

.seal {
  margin-top: .65rem;
  font-family: var(--mono);
  font-size: .76rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  background: var(--alarm);
  color: #fff;
  border: 0;
  padding: .45rem .95rem;
  cursor: pointer;
}
.seal[hidden] { display: none; }
.seal:hover { background: var(--bone); color: var(--graphite); }
.seal--done { background: var(--petrol); }

/* ---------- Motohodiny ---------- */

.hours {
  position: fixed;
  right: 0; bottom: 0;
  z-index: 30;
  background: var(--graphite-2);
  border: 1px solid var(--line);
  border-right: 0; border-bottom: 0;
  padding: .4rem .7rem;
  font-family: var(--mono);
  font-size: .7rem;
  color: var(--steel);
  letter-spacing: .08em;
  pointer-events: none;
}
.hours b { color: var(--amber); font-weight: 500; }
@media (max-width: 46rem) { .hours { display: none; } }

/* ---------- Sekce ---------- */

.sec { padding: clamp(2.75rem, 7vw, 5rem) 0; border-top: 1px solid var(--line); }
.sec__head { margin-bottom: 1.9rem; }
.sec__head h2 { font-size: clamp(1.85rem, 4.6vw, 2.9rem); margin: .3rem 0 .5rem; }
.sec__head p { color: var(--steel); margin: 0; max-width: 42rem; }

/* Typové štítky = služby */

.plates { display: grid; grid-template-columns: repeat(auto-fit, minmax(16.5rem, 1fr)); gap: 1.1rem; }

.pl {
  position: relative;
  background: var(--graphite-2);
  border: 1px solid var(--line);
  padding: 1.35rem 1.25rem 1.4rem;
  overflow: hidden;
}
/* nýty v rozích */
.pl::before, .pl::after {
  content: "";
  position: absolute;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--line);
  box-shadow: 0 0 0 1px rgba(232, 228, 218, .08);
}
.pl::before { left: 9px; top: 9px; }
.pl::after { right: 9px; top: 9px; }

.pl__no {
  font-family: var(--mono);
  font-size: .7rem;
  letter-spacing: .16em;
  color: var(--amber);
  display: block;
  margin-bottom: .6rem;
}
.pl h3 { font-size: 1.35rem; margin-bottom: .5rem; }
.pl p { color: var(--steel); font-size: .97rem; margin: 0; }

/* razítko na štítku */
.pl__stamp {
  position: absolute;
  right: .7rem; bottom: .55rem;
  font-family: var(--mono);
  font-size: .62rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--petrol);
  border: 2px solid var(--petrol);
  padding: .18rem .4rem;
  transform: rotate(-9deg) scale(.72);
  opacity: 0;
  pointer-events: none;
}
@media (prefers-reduced-motion: no-preference) {
  .pl__stamp { transition: opacity .16s ease-out, transform .16s cubic-bezier(.3, 1.5, .5, 1); }
}
.pl:hover .pl__stamp, .pl:focus-within .pl__stamp, .pl.is-stamped .pl__stamp { opacity: 1; transform: rotate(-9deg) scale(1); }

/* Postup */

.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); }
.steps li { background: var(--graphite); padding: 1.1rem 1.25rem; display: grid; grid-template-columns: 3.2rem minmax(0, 1fr); gap: .2rem 1rem; align-items: baseline; }
.steps i { font-style: normal; font-family: var(--mono); font-size: 1.2rem; color: var(--amber); }
.steps b { font-family: var(--display); text-transform: uppercase; letter-spacing: .05em; font-size: 1.18rem; font-weight: 600; }
.steps span { grid-column: 2; color: var(--steel); font-size: .97rem; }

/* O firmě */

.about { display: grid; grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr)); gap: clamp(1.25rem, 3vw, 2.5rem); align-items: start; }
.about p { color: var(--steel); }
.facts { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.facts li { display: flex; justify-content: space-between; gap: 1rem; padding: .62rem 0; border-bottom: 1px solid var(--line); font-family: var(--mono); font-size: .84rem; }
.facts li span { color: var(--steel); }
.facts li b { color: var(--bone); font-weight: 500; text-align: right; }

/* Výdejní místo = kontakt */

.outlet { position: relative; }
.outlet__pipe { height: 6px; background: var(--graphite-3); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); margin-bottom: 2.1rem; }
.outlet__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); gap: 1.5rem; }
.outlet .big {
  margin: 0;
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(2rem, 5.5vw, 3.1rem);
  letter-spacing: .01em;
  color: var(--amber);
  line-height: 1.05;
}
.outlet dl { margin: 0; font-family: var(--mono); font-size: .86rem; }
.outlet dt { color: var(--steel); letter-spacing: .1em; text-transform: uppercase; font-size: .68rem; margin-top: .85rem; }
.outlet dd { margin: .12rem 0 0; color: var(--bone); }

/* Patička */

footer.foot { border-top: 1px solid var(--line); padding: 1.6rem 0 2.4rem; }
.foot__in { display: flex; flex-wrap: wrap; gap: .6rem 1.5rem; justify-content: space-between; font-family: var(--mono); font-size: .73rem; color: var(--steel); letter-spacing: .02em; }
.foot__in a { color: var(--steel); }
.foot__in a:hover { color: var(--amber); }

/* ---------- Nástup (M1): 4 akty, jen mimo reduced-motion ---------- */

.dr { stroke-dasharray: 1; stroke-dashoffset: 0; }

@media (prefers-reduced-motion: no-preference) {
  .gauge .dr { animation: draw .8s cubic-bezier(.4, 0, .4, 1) calc(.15s + var(--i, 0) * .05s) both; }
  @keyframes draw { from { stroke-dashoffset: 1; } to { stroke-dashoffset: 0; } }

  /* akt 3: ručička najede z nuly */
  .js .gauge .needle { animation: sweep 1.5s cubic-bezier(.3, .05, .2, 1) .55s both; }
  @keyframes sweep {
    from { transform: rotate(-130deg); }
    72%  { transform: rotate(calc((var(--a, 57.2) + 7) * 1deg)); }
    to   { transform: rotate(calc(var(--a, 57.2) * 1deg)); }
  }

  /* akt 2: uzly nastoupí */
  .js .nodes li { animation: node-in .45s ease-out calc(.85s + var(--i, 0) * .1s) both; }
  @keyframes node-in { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }

  /* akt 4: text */
  .js .hero__copy > * { animation: rise .55s ease-out calc(1.25s + var(--i, 0) * .09s) both; }
  @keyframes rise { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
}

/* ---------- Responzivita ---------- */

@media (max-width: 62rem) {
  .hero__grid { grid-template-columns: minmax(0, 1fr); }
  .gauge { max-width: 16rem; }
}

@media (max-width: 52rem) {
  .nav { display: none; }
  .burger { display: block; }

  .circuit { padding-top: 1rem; }
  .circuit::before { display: none; }
  .nodes { flex-direction: column; gap: 0; border-left: 6px solid var(--graphite-3); padding-left: 1.1rem; }
  .nodes li { flex: none; }
  .node { display: grid; grid-template-columns: 26px minmax(0, 1fr) auto; align-items: center; gap: .8rem; text-align: left; padding: .62rem 0; border-bottom: 1px solid var(--line); }
  .node__dot { margin: 0; }
  .node__val { text-align: right; }
}

@media (max-width: 30rem) {
  body { font-size: 1rem; }
  .brand__name { font-size: 1.1rem; letter-spacing: .16em; }
}