/* Hľadač piesní: futuristický HUD štýl. Tmavý základ, azúrový neón, ostré rohy, mriežka na pozadí. */
:root {
  color-scheme: dark;
  --bg: #04060c;
  --panel: rgba(12, 19, 36, 0.66);
  --panel-solid: #0a1121;
  --line: rgba(120, 170, 255, 0.16);
  --line-strong: rgba(53, 230, 255, 0.42);
  --ink: #e3ecff;
  --muted: #8d9cc0;
  --cyan: #35e6ff;
  --blue: #3b7bff;
  --violet: #9a7bff;
  --warn: #ffb85c;
  --lcd: #1c3fe0;
  --lcd-ink: #e9f0ff;
  --lcd-cell: rgba(4, 10, 60, 0.3);
  --code-bg: #060a14;
  --font-display: 'Chakra Petch', 'Segoe UI', system-ui, sans-serif;
  --font-body: 'Exo 2', 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', Consolas, 'Courier New', monospace;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 5rem; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 1.0625rem/1.7 var(--font-body);
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(60rem 40rem at 12% -10%, rgba(53, 230, 255, 0.14), transparent 60%),
    radial-gradient(50rem 36rem at 95% 8%, rgba(154, 123, 255, 0.14), transparent 60%),
    linear-gradient(rgba(120, 170, 255, 0.05) 1px, transparent 1px) 0 0 / 56px 56px,
    linear-gradient(90deg, rgba(120, 170, 255, 0.05) 1px, transparent 1px) 0 0 / 56px 56px;
}
a { color: var(--cyan); text-underline-offset: 0.2em; }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; }
img, video { max-width: 100%; display: block; }
p { margin: 0; }
code { font: 400 0.88em/1.4 var(--font-mono); color: var(--cyan); background: rgba(53, 230, 255, 0.08); padding: 0.1em 0.4em; border-radius: 3px; overflow-wrap: anywhere; }

.wrap { max-width: 72rem; margin-inline: auto; padding-inline: clamp(1rem, 4vw, 2rem); }

/* top bar */
.bar { position: sticky; top: 0; z-index: 10; backdrop-filter: blur(12px); background: rgba(4, 6, 12, 0.72); border-bottom: 1px solid var(--line); padding-top: env(safe-area-inset-top, 0px); }
.bar .wrap { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 3.5rem; }
.brand { font: 700 1rem/1 var(--font-display); letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink); text-decoration: none; display: flex; align-items: center; gap: 0.6rem; }
.brand i { width: 0.7rem; height: 0.7rem; background: var(--cyan); box-shadow: 0 0 12px var(--cyan); display: block; }
.bar nav { display: flex; gap: 1.4rem; flex-wrap: wrap; justify-content: flex-end; }
.bar nav a { color: var(--muted); text-decoration: none; font: 500 0.82rem/1 var(--font-mono); letter-spacing: 0.06em; text-transform: uppercase; padding: 0.4rem 0; }
.bar nav a:hover { color: var(--cyan); }
@media (max-width: 52rem) { .bar nav a:not(.keep) { display: none; } }

/* hero */
.hero { padding-block: clamp(3rem, 8vw, 6rem) 3rem; display: grid; gap: 2.5rem; grid-template-columns: minmax(0, 1fr); align-items: center; }
@media (min-width: 62rem) { .hero { grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr); gap: 3rem; } }
.tag { font: 500 0.78rem/1.2 var(--font-mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--cyan); display: flex; align-items: center; gap: 0.7rem; }
.tag::before { content: ""; width: 2.2rem; height: 1px; background: var(--cyan); }
h1 { margin: 0.9rem 0 0; font: 700 clamp(2.8rem, 9vw, 5.6rem)/0.98 var(--font-display); letter-spacing: 0.01em; text-transform: uppercase; background: linear-gradient(100deg, #ffffff 10%, var(--cyan) 55%, var(--blue) 95%); -webkit-background-clip: text; background-clip: text; color: transparent; text-wrap: balance; }
.lead { margin-top: 1.4rem; font-size: clamp(1.1rem, 2.4vw, 1.3rem); line-height: 1.6; color: #c4d3f2; max-width: 36rem; }
.cta { margin-top: 2rem; display: flex; flex-wrap: wrap; gap: 0.9rem; }
.btn { display: inline-flex; align-items: center; gap: 0.6rem; padding: 0.85rem 1.4rem; font: 600 0.88rem/1 var(--font-mono); letter-spacing: 0.08em; text-transform: uppercase; text-decoration: none; border: 1px solid var(--cyan); color: var(--bg); background: var(--cyan); clip-path: polygon(0 0, calc(100% - 0.7rem) 0, 100% 0.7rem, 100% 100%, 0.7rem 100%, 0 calc(100% - 0.7rem)); transition: box-shadow 0.2s, transform 0.2s; }
.btn:hover { box-shadow: 0 0 24px rgba(53, 230, 255, 0.55); }
.btn.ghost { background: transparent; color: var(--cyan); }
.btn.ghost:hover { background: rgba(53, 230, 255, 0.1); }
.byline { margin-top: 2.2rem; display: grid; gap: 0.2rem; font: 400 0.82rem/1.5 var(--font-mono); color: var(--muted); letter-spacing: 0.04em; }
.byline b { font-weight: 500; color: var(--ink); font-size: 0.95rem; letter-spacing: 0.02em; }

/* LCD mock */
.device { position: relative; padding: 1.1rem; background: linear-gradient(160deg, #101a30, #080d1a); border: 1px solid var(--line-strong); box-shadow: 0 0 60px rgba(53, 230, 255, 0.14), inset 0 0 40px rgba(53, 230, 255, 0.05); }
.device::before, .device::after, .panel::before, .panel::after { content: ""; position: absolute; width: 16px; height: 16px; border: 2px solid var(--cyan); pointer-events: none; }
.device::before, .panel::before { top: -2px; left: -2px; border-right: 0; border-bottom: 0; }
.device::after, .panel::after { right: -2px; bottom: -2px; border-left: 0; border-top: 0; }
.lcd { background: var(--lcd); border: 6px solid #0b0e16; padding: clamp(0.5rem, 2vw, 0.9rem); display: grid; gap: 4px; box-shadow: 0 0 34px rgba(28, 63, 224, 0.55); }
.lcd-row { display: grid; grid-template-columns: repeat(16, minmax(0, 1fr)); gap: 3px; }
.lcd-row > span, .lcd-row > i { aspect-ratio: 5 / 8; display: grid; place-items: center; background: var(--lcd-cell); color: var(--lcd-ink); font: 500 clamp(0.74rem, 3.4vw, 1.5rem)/1 var(--font-mono); font-style: normal; text-shadow: 0 0 8px rgba(233, 240, 255, 0.7); }
.lcd-row > i { position: relative; }
.lcd-row > i::after { content: ""; position: absolute; left: 18%; right: 18%; bottom: 0; height: calc(var(--h) * 12.5%); background: var(--lcd-ink); box-shadow: 0 0 10px rgba(233, 240, 255, 0.8); }
.device figcaption { margin-top: 0.9rem; font: 400 0.8rem/1.5 var(--font-mono); color: var(--muted); }
.chips { margin: 1.1rem 0 0; padding: 0; list-style: none; display: flex; flex-wrap: wrap; gap: 0.6rem; }
.chips li { font: 500 0.74rem/1 var(--font-mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--cyan); border: 1px solid var(--line-strong); padding: 0.45rem 0.7rem; }

/* sections */
section { padding-block: clamp(3rem, 7vw, 5rem); border-top: 1px solid var(--line); }
.head { display: grid; gap: 0.6rem; margin-bottom: 2rem; max-width: 46rem; }
h2 { margin: 0; font: 700 clamp(1.9rem, 5vw, 2.8rem)/1.1 var(--font-display); text-transform: uppercase; letter-spacing: 0.02em; text-wrap: balance; }
h3 { margin: 2rem 0 0.7rem; font: 600 1.15rem/1.3 var(--font-display); letter-spacing: 0.04em; text-transform: uppercase; color: #c4d3f2; }
.prose { max-width: 46rem; display: grid; gap: 1rem; }
.prose p { color: #c4d3f2; }
.panel { position: relative; background: var(--panel); border: 1px solid var(--line); backdrop-filter: blur(8px); }
.grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); }
.card { padding: 1.3rem; display: grid; gap: 0.5rem; align-content: start; }
.card b { font: 600 1.05rem/1.3 var(--font-display); letter-spacing: 0.03em; }
.card span, .card p { color: var(--muted); font-size: 0.97rem; line-height: 1.55; }
.card .qty { font: 500 0.75rem/1 var(--font-mono); color: var(--cyan); letter-spacing: 0.08em; text-transform: uppercase; }
ul.plain, ol.plain { margin: 0; padding-left: 1.3rem; display: grid; gap: 0.5rem; color: #c4d3f2; }

/* tables */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); background: var(--panel); }
table { border-collapse: collapse; width: 100%; min-width: 28rem; font-size: 0.95rem; }
th, td { text-align: left; padding: 0.65rem 0.95rem; vertical-align: top; border-bottom: 1px solid var(--line); }
tr:last-child > td { border-bottom: 0; }
th { font: 500 0.72rem/1.2 var(--font-mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--cyan); background: rgba(53, 230, 255, 0.06); }
td { color: #c4d3f2; }
td:first-child { color: var(--ink); font-weight: 500; }
.num { text-align: right; font-variant-numeric: tabular-nums; }

/* flow */
.flow { list-style: none; margin: 0; padding: 0; display: flex; align-items: stretch; }
.flow .node { flex: 1 1 0; min-width: 0; display: grid; gap: 0.2rem; align-content: center; padding: 1rem; position: relative; background: var(--panel); border: 1px solid var(--line-strong); }
.flow .node b { font: 600 1rem/1.25 var(--font-display); letter-spacing: 0.04em; text-transform: uppercase; }
.flow .node span { font-size: 0.85rem; color: var(--muted); line-height: 1.35; }
.flow .link { flex: 0 0 5rem; display: grid; justify-items: center; align-content: center; gap: 0.35rem; font: 400 0.7rem/1.2 var(--font-mono); color: var(--muted); text-align: center; text-transform: uppercase; letter-spacing: 0.06em; }
.flow .line { position: relative; width: 100%; height: 2px; background: var(--line-strong); overflow: hidden; }
.flow .line::after { content: ""; position: absolute; top: 0; left: -30%; width: 30%; height: 100%; background: var(--cyan); box-shadow: 0 0 10px var(--cyan); animation: pulse 2.2s linear infinite; }
@keyframes pulse { to { left: 100%; } }
@media (prefers-reduced-motion: reduce) { .flow .line::after { animation: none; left: 35%; } }
@media (max-width: 46rem) {
  .flow { flex-direction: column; }
  .flow .link { flex-basis: auto; padding: 0.6rem 0; }
  .flow .line { width: 2px; height: 2.2rem; }
  .flow .line::after { width: 100%; height: 30%; top: -30%; left: 0; animation-name: pulse-v; }
  @keyframes pulse-v { to { top: 100%; } }
}

/* steps */
ol.steps { list-style: none; margin: 0; padding: 0; counter-reset: step; display: grid; gap: 1rem; }
ol.steps > li { counter-increment: step; display: grid; grid-template-columns: 2.4rem minmax(0, 1fr); gap: 1rem; color: #c4d3f2; }
ol.steps > li::before { content: counter(step); display: grid; place-items: center; width: 2.4rem; height: 2.4rem; border: 1px solid var(--cyan); color: var(--cyan); font: 600 0.95rem/1 var(--font-mono); clip-path: polygon(0 0, calc(100% - 0.5rem) 0, 100% 0.5rem, 100% 100%, 0.5rem 100%, 0 calc(100% - 0.5rem)); }
ol.steps > li > div { min-width: 0; padding-top: 0.35rem; }
ol.steps strong { color: var(--ink); font-weight: 600; }

/* media */
.media-grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); margin-top: 1rem; }
.slot { position: relative; aspect-ratio: 16 / 10; background: var(--panel-solid); border: 1px solid var(--line); overflow: hidden; display: grid; place-items: center; }
.slot.video { aspect-ratio: 16 / 9; max-width: 56rem; }
.slot img, .slot video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.slot .ph { position: absolute; inset: 0; display: grid; place-items: center; align-content: center; gap: 0.4rem; text-align: center; color: var(--muted); font: 400 0.78rem/1.4 var(--font-mono); letter-spacing: 0.06em; text-transform: uppercase; padding: 1rem; background: repeating-linear-gradient(135deg, transparent 0 14px, rgba(120, 170, 255, 0.05) 14px 15px); }
.slot.ok .ph { display: none; }
.slot figcaption { position: absolute; left: 0; right: 0; bottom: 0; padding: 0.6rem 0.8rem; font: 400 0.78rem/1.3 var(--font-mono); background: linear-gradient(transparent, rgba(4, 6, 12, 0.92)); color: var(--ink); }
.slot:not(.ok) figcaption { display: none; }

/* code */
.tabs { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-bottom: 1rem; }
.tabs button { cursor: pointer; font: 500 0.8rem/1 var(--font-mono); letter-spacing: 0.08em; text-transform: uppercase; padding: 0.7rem 1rem; color: var(--muted); background: transparent; border: 1px solid var(--line); }
.tabs button[aria-selected="true"] { color: var(--bg); background: var(--cyan); border-color: var(--cyan); }
.code { background: var(--code-bg); border: 1px solid var(--line-strong); }
.code-head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 0.6rem 0.9rem; border-bottom: 1px solid var(--line); color: var(--muted); font: 400 0.78rem/1.2 var(--font-mono); }
.copy { flex: none; cursor: pointer; font: 500 0.75rem/1 var(--font-mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--cyan); background: transparent; border: 1px solid var(--line-strong); padding: 0.45rem 0.75rem; }
.copy:hover { background: rgba(53, 230, 255, 0.1); }
.code pre { margin: 0; padding: 1rem; overflow-x: auto; color: #dfe9ff; tab-size: 2; max-height: 38rem; }
.code pre code { background: none; padding: 0; color: inherit; font: 400 0.82rem/1.55 var(--font-mono); white-space: pre; overflow-wrap: normal; }
.hljs-comment, .hljs-quote { color: #6f7fa3; font-style: italic; }
.hljs-keyword, .hljs-selector-tag, .hljs-doctag { color: #7fb0ff; }
.hljs-string, .hljs-regexp { color: #8ff0b4; }
.hljs-number, .hljs-literal, .hljs-symbol { color: #ffb86b; }
.hljs-title, .hljs-title.function_ { color: #e4eeff; }
.hljs-built_in, .hljs-type { color: #4fe0f2; }
.hljs-meta, .hljs-meta .hljs-keyword { color: #c4a7ff; }
pre.plainpre { margin: 0; padding: 0.9rem 1rem; overflow-x: auto; background: var(--code-bg); color: #dfe9ff; border: 1px solid var(--line); font: 400 0.84rem/1.55 var(--font-mono); }
pre.plainpre code { background: none; padding: 0; color: inherit; font: inherit; white-space: pre; }

/* warn + details */
.warn { padding: 1rem 1.2rem; border: 1px solid var(--warn); background: rgba(255, 184, 92, 0.08); color: #ffd9a6; display: grid; gap: 0.3rem; }
.warn b { font: 500 0.74rem/1.2 var(--font-mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--warn); }
details { border: 1px solid var(--line); background: var(--panel); }
details + details { margin-top: 0.6rem; }
summary { cursor: pointer; padding: 0.9rem 1.1rem; font: 500 1rem/1.4 var(--font-body); list-style: none; display: flex; justify-content: space-between; gap: 1rem; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; font: 500 1.2rem/1 var(--font-mono); color: var(--cyan); }
details[open] summary::after { content: "−"; }
details > div { padding: 0 1.1rem 1rem; color: #c4d3f2; }

/* author */
.author { display: grid; gap: 1.5rem; grid-template-columns: minmax(0, 1fr); align-items: center; padding: clamp(1.4rem, 4vw, 2.4rem); }
@media (min-width: 52rem) { .author { grid-template-columns: 1fr auto; } }
.author h3 { margin: 0 0 0.5rem; font-size: 1.6rem; color: var(--ink); }
.author p { color: #c4d3f2; max-width: 38rem; }

footer { border-top: 1px solid var(--line); padding-block: 2rem; color: var(--muted); font: 400 0.82rem/1.6 var(--font-mono); }
footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.6rem 2rem; }

/* fotky a video sa zobrazia až po úspešnom načítaní, kým je tam zástupný panel */
.slot img, .slot video { opacity: 0; transition: opacity 0.4s; }
.slot.ok img, .slot.ok video { opacity: 1; }