/* ==========================================================================
   JPKonstrukt – konštrukčná kancelária
   Technický, čistý a presný: tmavá oceľ, mriežka výkresu, bezpečnostná oranžová.
   ========================================================================== */

@font-face { font-family: "Space Grotesk"; font-weight: 300 700; font-display: swap; src: url(../fonts/space-grotesk-latin.woff2) format("woff2");
  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; }
@font-face { font-family: "Space Grotesk"; font-weight: 300 700; font-display: swap; src: url(../fonts/space-grotesk-latin-ext.woff2) format("woff2");
  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-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF; }
@font-face { font-family: "Inter"; font-weight: 300 700; font-display: swap; src: url(../fonts/inter-latin.woff2) format("woff2");
  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; }
@font-face { font-family: "Inter"; font-weight: 300 700; font-display: swap; src: url(../fonts/inter-latin-ext.woff2) format("woff2");
  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-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF; }
@font-face { font-family: "JetBrains Mono"; font-weight: 500; font-display: swap; src: url(../fonts/jetbrains-mono-latin.woff2) format("woff2");
  unicode-range: U+0000-00FF, U+2000-206F; }
@font-face { font-family: "JetBrains Mono"; font-weight: 500; font-display: swap; src: url(../fonts/jetbrains-mono-latin-ext.woff2) format("woff2");
  unicode-range: U+0100-02FF, U+1E00-1EFF; }

:root {
  --ink: #0d1620;
  --steel: #16232f;
  --steel-2: #1e2e3c;
  --text: #2a3540;
  --muted: #66727e;
  --line: #dde2e6;
  --paper: #ffffff;
  --paper-2: #f3f5f6;
  --accent: #ff6a13;
  --accent-dark: #e05500;
  --on-dark: #e9eef2;
  --on-dark-muted: #95a3b0;
  --head: "Space Grotesk", "Helvetica Neue", Arial, sans-serif;
  --body: "Inter", "Helvetica Neue", Arial, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, Menlo, monospace;
  --wrap: 1240px;
  --gutter: clamp(16px, 4vw, 40px);
  --section: clamp(72px, 9vw, 128px);
  --header-h: 76px;
  --ease: cubic-bezier(.2, .7, .2, 1);
  color-scheme: light;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--text); font: 400 17px/1.65 var(--body); -webkit-font-smoothing: antialiased; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
h1, h2, h3 { margin: 0; font-family: var(--head); color: var(--ink); letter-spacing: -.02em; }
p { margin: 0 0 1em; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
::selection { background: var(--accent); color: #fff; }
.skip { position: absolute; left: -9999px; z-index: 100; padding: 8px 14px; background: var(--accent); color: #fff; }
.skip:focus { left: 8px; top: 8px; }

.wrap { width: 100%; max-width: calc(var(--wrap) + 2 * var(--gutter)); margin: 0 auto; padding: 0 var(--gutter); }
.narrow { max-width: calc(760px + 2 * var(--gutter)); }
.center { text-align: center; }
.mono { font: 500 12px/1.4 var(--mono); letter-spacing: .06em; text-transform: uppercase; }
.muted { color: var(--muted); }

.h2 { font-size: clamp(32px, 4vw, 52px); font-weight: 600; line-height: 1.08; margin-bottom: 18px; }
.h3 { font-size: 21px; font-weight: 600; line-height: 1.25; margin-bottom: 10px; }
.lead { font-size: clamp(18px, 1.4vw, 20px); line-height: 1.6; color: var(--muted); }
.kicker { margin: 0 0 16px; font: 500 12.5px/1.4 var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--accent-dark); }
.kicker a { text-decoration: none; }
.kicker-light { color: var(--accent); }

/* ---------- tlačidlá ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 52px; padding: 0 26px; border: 1px solid transparent; border-radius: 2px;
  font: 600 15px/1 var(--head); letter-spacing: .01em; text-decoration: none; cursor: pointer;
  transition: background .25s, color .25s, border-color .25s, transform .25s var(--ease);
}
.btn:active { transform: translateY(1px); }
.btn-accent { background: var(--accent); color: #fff; }
.btn-accent:hover { background: var(--accent-dark); }
.btn-ghost { border-color: rgba(233, 238, 242, .35); color: var(--on-dark); }
.btn-ghost:hover { border-color: var(--on-dark); background: rgba(255, 255, 255, .06); }
.btn-outline { border-color: var(--ink); background: transparent; color: var(--ink); font-family: var(--head); }
.btn-outline:hover { background: var(--ink); color: #fff; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 36px; }
.link { display: inline-flex; gap: 8px; font: 600 15px var(--head); color: var(--ink); text-decoration: none; border-bottom: 1px solid var(--accent); padding-bottom: 2px; }
.link:hover { color: var(--accent-dark); }

/* ---------- hlavička ---------- */
.header { position: fixed; inset: 0 0 auto; z-index: 50; height: var(--header-h); color: var(--on-dark); transition: background .3s, box-shadow .3s, color .3s; }
.header.is-scrolled, .page-privacy .header, .page-notfound .header { background: rgba(13, 22, 32, .92); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); box-shadow: 0 1px 0 rgba(255, 255, 255, .06); }
.header-in { display: flex; align-items: center; justify-content: space-between; height: 100%; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; color: inherit; }
.brand-mark { width: 34px; height: 34px; flex: none; color: currentColor; }
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-text strong { font: 700 19px var(--head); letter-spacing: -.01em; }
.brand-text span { font: 500 10.5px var(--mono); letter-spacing: .14em; text-transform: uppercase; opacity: .65; margin-top: 3px; }
.nav { display: flex; align-items: center; gap: clamp(16px, 2.6vw, 36px); }
.nav a { position: relative; font: 500 15px var(--head); text-decoration: none; padding: 6px 0; }
.nav a:not(.nav-cta)::after { content: ""; position: absolute; left: 0; right: 100%; bottom: 0; height: 2px; background: var(--accent); transition: right .3s var(--ease); }
.nav a:not(.nav-cta):hover::after { right: 0; }
.nav .nav-cta { padding: 11px 20px; background: var(--accent); color: #fff; border-radius: 2px; }
.nav .nav-cta:hover { background: var(--accent-dark); }
.nav-toggle { display: none; position: relative; width: 44px; height: 44px; margin-right: -10px; border: 0; background: none; color: inherit; cursor: pointer; z-index: 60; }
.nav-toggle span { position: absolute; left: 11px; right: 11px; height: 2px; background: currentColor; transition: transform .3s var(--ease), top .3s var(--ease); }
.nav-toggle span:first-child { top: 17px; }
.nav-toggle span:last-child { top: 25px; }
.nav-open .nav-toggle span:first-child { top: 21px; transform: rotate(45deg); }
.nav-open .nav-toggle span:last-child { top: 21px; transform: rotate(-45deg); }
@media (max-width: 860px) {
  :root { --header-h: 66px; }
  .nav-toggle { display: block; }
  .nav {
    position: fixed; inset: 0; z-index: 55; flex-direction: column; justify-content: center; gap: 8px;
    background: var(--ink); opacity: 0; visibility: hidden; transition: opacity .3s, visibility .3s;
  }
  .nav a { font-size: 30px; font-weight: 600; }
  .nav .nav-cta { margin-top: 16px; font-size: 18px; padding: 16px 28px; }
  .nav-open { overflow: hidden; }
  .nav-open .nav { opacity: 1; visibility: visible; }
  .nav-open .header { backdrop-filter: none; -webkit-backdrop-filter: none; }
  .brand { position: relative; z-index: 60; }
}

/* ---------- úvod ---------- */
.hero {
  position: relative; overflow: hidden; color: var(--on-dark);
  padding: calc(var(--header-h) + clamp(48px, 8vw, 104px)) 0 0;
  background:
    radial-gradient(ellipse 60% 70% at 78% 40%, rgba(255, 106, 19, .14), transparent 70%),
    linear-gradient(rgba(255, 255, 255, .045) 1px, transparent 1px) 0 0 / 48px 48px,
    linear-gradient(90deg, rgba(255, 255, 255, .045) 1px, transparent 1px) 0 0 / 48px 48px,
    linear-gradient(180deg, var(--ink), var(--steel));
}
.hero-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: clamp(32px, 5vw, 72px); align-items: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 10px; margin: 0 0 24px; padding: 7px 14px; border: 1px solid rgba(233, 238, 242, .18); border-radius: 100px; font: 500 12.5px var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--on-dark-muted); }
.eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px rgba(255, 106, 19, .2); }
.hero-title { font-size: clamp(40px, 5.4vw, 74px); font-weight: 600; line-height: 1.02; letter-spacing: -.035em; color: #fff; }
.hero-text { max-width: 52ch; margin: 24px 0 0; font-size: clamp(17px, 1.3vw, 19px); color: var(--on-dark-muted); }

.hero-visual { position: relative; aspect-ratio: 5 / 4; }
.hero-shot { position: absolute; inset: 0; margin: 0; opacity: 0; transition: opacity 1.2s var(--ease); background: var(--steel-2); }
.hero-shot.is-active { opacity: 1; }
.hero-shot img { width: 100%; height: 100%; object-fit: cover; }
.hero-shot figcaption {
  position: absolute; left: 0; bottom: 0; display: flex; gap: 12px; align-items: center;
  padding: 12px 16px; background: var(--ink); color: var(--on-dark); font: 500 12px var(--mono); letter-spacing: .06em; text-transform: uppercase;
}
.hero-shot figcaption span { color: var(--accent); }
.crop { position: absolute; width: 22px; height: 22px; border-color: var(--accent); border-style: solid; border-width: 0; }
.crop-tl { top: -10px; left: -10px; border-top-width: 2px; border-left-width: 2px; }
.crop-tr { top: -10px; right: -10px; border-top-width: 2px; border-right-width: 2px; }
.crop-bl { bottom: -10px; left: -10px; border-bottom-width: 2px; border-left-width: 2px; }
.crop-br { bottom: -10px; right: -10px; border-bottom-width: 2px; border-right-width: 2px; }

.stats { display: grid; grid-template-columns: repeat(4, 1fr); margin: clamp(56px, 8vw, 96px) 0 0; border-top: 1px solid rgba(233, 238, 242, .12); }
.stats > div { padding: 28px 24px 36px 0; border-right: 1px solid rgba(233, 238, 242, .12); }
.stats > div + div { padding-left: 24px; }
.stats > div:last-child { border-right: 0; }
.stats dt { font: 500 11.5px var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--on-dark-muted); }
.stats dd { margin: 8px 0 0; font: 600 clamp(30px, 3.4vw, 44px)/1 var(--head); color: #fff; letter-spacing: -.02em; }
.stats dd small { font-size: .45em; color: var(--on-dark-muted); font-weight: 500; letter-spacing: 0; }
.stats .dd-text { font-size: clamp(19px, 1.8vw, 24px); line-height: 1.25; }
@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { margin: 12px 10px 0; }
  .stats { grid-template-columns: 1fr 1fr; }
  .stats > div:nth-child(2) { border-right: 0; }
  .stats > div:nth-child(3) { padding-left: 0; }
  .stats > div:nth-child(n+3) { border-top: 1px solid rgba(233, 238, 242, .12); }
}

/* ---------- sekcie ---------- */
.section { padding: var(--section) 0; }
.section-alt { background: var(--paper-2); }
.section-dark { background: var(--ink); color: var(--on-dark); }
.section-dark .h2, .section-dark .h3 { color: #fff; }
.section-dark .lead { color: var(--on-dark-muted); }
.section-head { max-width: 760px; margin-bottom: clamp(36px, 5vw, 64px); }
.section-head-row { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: flex-end; gap: 24px; max-width: none; }
.section-head-row .h2 { margin-bottom: 0; }

/* služby */
.services { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.service { position: relative; display: flex; flex-direction: column; padding: 32px 28px 36px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--paper); transition: background .3s; }
.service::before { content: ""; position: absolute; left: -1px; right: -1px; top: -1px; height: 3px; background: var(--accent); transform: scaleX(0); transform-origin: left; transition: transform .4s var(--ease); }
.service:hover::before { transform: scaleX(1); }
.service-top { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 40px; }
.service-icon { display: grid; place-items: center; width: 56px; height: 56px; background: var(--paper-2); color: var(--ink); }
.service p { color: var(--muted); font-size: 16px; }
.service .link { margin-top: auto; align-self: flex-start; }
@media (max-width: 1060px) { .services { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .services { grid-template-columns: 1fr; } }

/* projekty */
.filters { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  display: inline-flex; align-items: center; gap: 8px; padding: 9px 14px; border: 1px solid var(--line); border-radius: 100px;
  background: var(--paper); color: var(--text); font: 500 14px var(--head); cursor: pointer; transition: border-color .2s, background .2s, color .2s;
}
.chip span { font: 500 11px var(--mono); color: var(--muted); }
.chip:hover { border-color: var(--ink); }
.chip.is-active { background: var(--ink); border-color: var(--ink); color: #fff; }
.chip.is-active span { color: var(--accent); }
.gallery { list-style: none; margin: 0 0 40px; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.project a { position: relative; display: block; aspect-ratio: 4 / 3; overflow: hidden; background: #e3e8ec; cursor: zoom-in; }
.project img { width: 100%; height: 100%; object-fit: cover; transition: transform .8s var(--ease); }
.project-info {
  position: absolute; inset: auto 0 0; display: flex; flex-direction: column; gap: 4px; padding: 40px 16px 14px;
  background: linear-gradient(transparent, rgba(13, 22, 32, .88)); color: #fff;
  opacity: 0; transform: translateY(8px); transition: opacity .35s, transform .35s var(--ease);
}
.project-info .mono { color: var(--accent); font-size: 11px; }
.project-info strong { font: 600 16px/1.25 var(--head); }
.project a:hover img { transform: scale(1.05); }
.project a:hover .project-info, .project a:focus-visible .project-info { opacity: 1; transform: none; }
.project.is-hidden, .gallery:not(.show-all) .project.is-more { display: none; }
.gallery.show-all + .center { display: none; }
@media (hover: none) { .project-info { opacity: 1; transform: none; } }
@media (max-width: 1060px) { .gallery { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 720px) { .gallery { grid-template-columns: repeat(2, 1fr); gap: 10px; } }

/* postup */
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; counter-reset: s; }
.step { position: relative; padding-top: 28px; }
.step::before { content: ""; position: absolute; top: 0; left: 0; right: -32px; height: 1px; background: var(--line); }
.step:last-child::before { right: 0; }
.step::after { content: ""; position: absolute; top: -5px; left: 0; width: 11px; height: 11px; background: var(--accent); }
.step-num { display: block; margin-bottom: 14px; color: var(--accent-dark); }
.step p { color: var(--muted); font-size: 16px; }
@media (max-width: 960px) { .steps { grid-template-columns: 1fr 1fr; } .step::before { right: 0; } }
@media (max-width: 560px) { .steps { grid-template-columns: 1fr; } }

/* o nás */
.about { display: grid; grid-template-columns: 1.1fr 1fr; gap: clamp(40px, 7vw, 112px); align-items: start; }
.about .lead { margin-bottom: 32px; }
.points { list-style: none; margin: 0; padding: 0; }
.points li { display: grid; grid-template-columns: 48px 1fr; gap: 12px; padding: 28px 0; border-bottom: 1px solid rgba(233, 238, 242, .12); }
.points li:first-child { padding-top: 6px; }
.points .mono { color: var(--accent); padding-top: 5px; }
.points p { margin: 0; color: var(--on-dark-muted); }
@media (max-width: 860px) { .about { grid-template-columns: 1fr; } }

/* kontakt */
.contact { display: grid; grid-template-columns: 1fr 1.1fr; gap: clamp(40px, 6vw, 96px); align-items: start; }
.contact-list { list-style: none; margin: 32px 0 0; padding: 0; border-top: 1px solid var(--line); }
.contact-list li { display: grid; grid-template-columns: 110px 1fr; gap: 12px; align-items: baseline; padding: 18px 0; border-bottom: 1px solid var(--line); }
.contact-list .mono { color: var(--muted); }
.contact-list a { font: 600 18px var(--head); color: var(--ink); text-decoration: none; }
.contact-list a:hover { color: var(--accent-dark); }
.contact-form { padding: clamp(24px, 4vw, 44px); background: var(--paper-2); border-top: 3px solid var(--accent); }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }
.field { margin-bottom: 18px; }
.field label { display: block; margin-bottom: 7px; font: 600 13.5px var(--head); color: var(--ink); }
.field input, .field textarea {
  width: 100%; padding: 13px 14px; border: 1px solid var(--line); border-radius: 2px; background: #fff;
  font: 400 16px/1.5 var(--body); color: var(--ink); transition: border-color .2s, box-shadow .2s;
}
.field textarea { resize: vertical; min-height: 130px; }
.field input:focus, .field textarea:focus { outline: none; border-color: var(--ink); box-shadow: 0 0 0 3px rgba(13, 22, 32, .08); }
.field [aria-invalid="true"] { border-color: #c63d2f; }
.field-error { margin: 6px 0 0; font-size: 14px; color: #b3321f; }
.field-check { display: grid; grid-template-columns: auto 1fr; gap: 12px; }
.field-check input { width: 20px; height: 20px; margin-top: 2px; accent-color: var(--accent); }
.field-check label { margin: 0; font: 400 14.5px/1.55 var(--body); color: var(--muted); }
.field-check .field-error { grid-column: 2; }
.hp { position: absolute; left: -9999px; }
.notice { padding: 16px 18px; margin-bottom: 20px; border-left: 3px solid var(--accent); background: #fff; }
.notice-ok { padding: 32px; }
.notice-error { border-color: #c63d2f; color: #a12d1c; }
@media (max-width: 860px) { .contact { grid-template-columns: 1fr; } }
@media (max-width: 520px) { .row { grid-template-columns: 1fr; } .contact-list li { grid-template-columns: 1fr; gap: 2px; } }

/* podstránky */
.page { padding-top: calc(var(--header-h) + clamp(48px, 7vw, 96px)); }
.page-404 { min-height: 70vh; }
.prose h2 { margin-top: 32px; }
.prose a { color: var(--accent-dark); }

/* pätička */
.footer { background: #091018; color: var(--on-dark-muted); padding: clamp(56px, 7vw, 88px) 0 28px; font-size: 15px; }
.footer a { text-decoration: none; color: var(--on-dark); }
.footer a:hover { color: var(--accent); }
.brand-light { color: #fff; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 40px; }
.footer-brand p { margin-top: 20px; max-width: 34ch; }
.footer-h { margin-bottom: 14px; font: 500 11.5px var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--accent); }
.footer-ids { font-size: 14px; }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; margin-top: 56px; padding-top: 24px; border-top: 1px solid rgba(233, 238, 242, .1); font-size: 13.5px; }
.footer-bottom p { margin: 0; }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr 1fr; } .footer-brand { grid-column: 1 / -1; } }
@media (max-width: 440px) { .footer-grid { grid-template-columns: 1fr; } }

/* prehliadanie projektov */
.lightbox { position: fixed; inset: 0; z-index: 100; display: grid; place-items: center; background: rgba(9, 16, 24, .96); opacity: 0; transition: opacity .3s; }
.lightbox[hidden] { display: none; }
.lightbox.is-open { opacity: 1; }
.lb-figure { margin: 0; display: flex; flex-direction: column; align-items: center; }
.lb-img { max-width: calc(100vw - 160px); max-height: calc(100vh - 130px); width: auto; height: auto; object-fit: contain; background: #fff; transition: opacity .25s; }
.lb-img.is-loading { opacity: .3; }
.lb-caption { margin-top: 16px; font: 500 13px var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--on-dark); text-align: center; padding: 0 16px; }
.lb-btn { position: absolute; width: 56px; height: 56px; border: 0; background: none; color: rgba(255, 255, 255, .7); font: 300 48px/1 var(--head); cursor: pointer; }
.lb-btn:hover { color: var(--accent); }
.lb-close { top: 12px; right: 12px; font-size: 40px; }
.lb-prev { left: 12px; top: 50%; transform: translateY(-50%); }
.lb-next { right: 12px; top: 50%; transform: translateY(-50%); }
.lb-count { position: absolute; top: 28px; left: 28px; font: 500 12px var(--mono); color: var(--on-dark-muted); }
@media (max-width: 700px) {
  .lb-img { max-width: 100vw; max-height: calc(100svh - 150px); }
  .lb-prev, .lb-next { top: auto; bottom: 8px; transform: none; }
}

/* jemné objavovanie */
.js .reveal { opacity: 0; transform: translateY(20px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.js .reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation: none !important; }
  .js .reveal { opacity: 1; transform: none; }
}