/* ByteReactor — shared site layout (home + blog)
   Source of truth: tokens + layout patterns extracted from home index.html
*/

/* ---------------------
   Design Tokens / Theme
   --------------------- */
:root {
  --bg: #0e0e0e;           /* tło */
  --surface: #141414;      /* karty */
  --surface-2: #1b1b1b;    /* hover */
  --text: #e6e6e6;         /* tekst główny */
  --muted: #a3a3a3;        /* tekst pomocniczy */
  --accent: #ff5e00;       /* pomarańcz */
  --accent-600: #e15600;   /* hover */
  --border: #262626;       /* ramki */
  --ok: #54d17a;
  --warn: #ffb000;

  /* Typografia */
  --ff-sans: "Inter", ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  --ff-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  --fs-hero: clamp(2.2rem, 4vw + 1rem, 4rem);
  --fs-h2: clamp(1.3rem, 1.4vw + 1rem, 2rem);
  --fs-body: clamp(1rem, 0.5vw + 0.9rem, 1.125rem);

  /* Layout */
  --radius: 14px;
  --shadow: 0 10px 30px rgba(0,0,0,.45);
  --container: min(1100px, 92vw);
  --nav-h: 64px;
}

/* ---------------------
   Base / Reset
   --------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { color-scheme: dark; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--ff-sans);
  background: var(--bg);
  color: var(--text);
  font-size: var(--fs-body);
  line-height: 1.6;
}
img, svg { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
:focus-visible { outline: 2px dashed var(--accent); outline-offset: 3px; border-radius: 6px; }

/* Subtle industrial texture */
body::before {
  content: "";
  position: fixed; inset: 0; pointer-events: none; z-index: -1;
  background:
    radial-gradient(1200px 600px at 80% -20%, rgba(255,94,0,.12), transparent 60%),
    radial-gradient(800px 400px at -10% 20%, rgba(255,94,0,.05), transparent 50%),
    linear-gradient(transparent 0, rgba(255,255,255,.02) 100%);
  mask-image: radial-gradient(100% 100% at 0 0, #000 60%, transparent 100%);
}

/* ---------------------
   Accessibility: skip link
   --------------------- */
.skip { position:absolute; left:-9999px; top:auto; width:1px; height:1px; overflow:hidden; }
.skip:focus {
  left: 1rem; top: .75rem; width:auto; height:auto;
  padding:.5rem .75rem; background: #000;
  border:1px solid var(--accent); border-radius: 8px;
}

/* ---------------------
   Top Bar / Navigation
   --------------------- */
header.site {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: blur(6px);
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  border-bottom: 1px solid var(--border);
}
.nav {
  height: var(--nav-h);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1rem;
  width: var(--container);
  margin-inline: auto;
  padding-inline: .75rem;
}
.brand {
  display:flex; align-items:center; gap:.6rem;
  font-family: var(--ff-mono);
  font-weight: 700;
  letter-spacing: .02em;
}
.brand svg { width: 28px; height: 28px; }
.brand span { font-variation-settings: "wght" 700; }

.menu { display: flex; gap: 1.2rem; justify-content: center; }
.menu a { position: relative; padding: .25rem .1rem; color: var(--muted); }
.menu a:hover, .menu a[aria-current="page"] { color: var(--text); }
.menu a::after {
  content:""; position:absolute; left:0; right:0; bottom:-8px;
  height:2px; background: var(--accent);
  transform: scaleX(0); transform-origin:left;
  transition: transform .25s ease;
}
.menu a:hover::after { transform: scaleX(1); }

.actions { display:flex; gap:.6rem; justify-content:flex-end; }

.btn, button.btn {
  display:inline-flex; align-items:center; gap:.5rem;
  padding:.55rem .9rem;
  border-radius: 999px;
  background: var(--accent);
  color:#0b0b0b;
  border:1px solid color-mix(in srgb, var(--accent) 80%, #000 20%);
  box-shadow: var(--shadow);
  transition: transform .12s ease, background .2s ease, box-shadow .2s ease;
  font-weight: 700;
}
.btn:hover { transform: translateY(-1px); background: var(--accent-600); }

.btn-link {
  display:inline-flex; align-items:center; gap:.4rem;
  padding:.45rem .7rem;
  border-radius: 10px;
  border:1px solid var(--border);
  background: var(--surface);
  transition: background .2s ease, transform .12s ease;
}
.btn-link:hover { background: var(--surface-2); transform: translateY(-1px); }

/* Hamburger (mobile) */
.burger {
  display:none;
  place-self:center end;
  width: 36px; height: 36px;
  border:1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  position: relative;
}
.burger span {
  position:absolute; left:8px; right:8px;
  height:2px; background: var(--text);
  transition: transform .2s ease, top .2s ease, opacity .2s ease;
}
.burger span:nth-child(1){ top:11px; }
.burger span:nth-child(2){ top:17px; }
.burger span:nth-child(3){ top:23px; }
.burger[aria-expanded="true"] span:nth-child(1){ top:17px; transform: rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2){ opacity:0; }
.burger[aria-expanded="true"] span:nth-child(3){ top:17px; transform: rotate(-45deg); }

/* ---------------------
   Shared hero
   --------------------- */
main { scroll-margin-top: calc(var(--nav-h) + 16px); }
.hero {
  width: var(--container);
  margin-inline: auto;
  padding: clamp(2rem, 5vw, 4rem) .75rem 2rem;
  display:grid;
  gap: 1.4rem;
  align-items:start;
}
.kicker {
  color: var(--muted);
  font-family: var(--ff-mono);
  letter-spacing: .08em;
  text-transform: uppercase;
  font-size:.85rem;
}
h1.hero-title {
  font-size: var(--fs-hero);
  line-height: 1.1;
  margin: 0;
  font-family: var(--ff-mono);
}
.hero-title .accent {
  color: var(--accent);
  text-shadow: 0 0 32px color-mix(in srgb, var(--accent) 25%, transparent);
}
.hero-sub { color: var(--muted); max-width: 65ch; }

/* ---------------------
   Shared sections + cards
   --------------------- */
section { width: var(--container); margin-inline:auto; padding: 2.5rem .75rem; }
section header.sec-h { display:flex; align-items:end; justify-content:space-between; gap:1rem; margin-bottom: 1.2rem; }
section h2 { font-size: var(--fs-h2); font-family: var(--ff-mono); color: var(--accent); margin: 0; }
.muted { color: var(--muted); }

.grid { display:grid; gap: 1rem; }

.card {
  background: linear-gradient(180deg, var(--surface), var(--surface-2));
  border:1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem;
  box-shadow: var(--shadow);
  position: relative;
  overflow: clip;
  transition: transform .2s ease, border-color .2s ease;
}
.card:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--accent) 35%, var(--border));
}

/* Blog post list */
.post-list { display:grid; gap: 1rem; }
.post-card h2 { margin: 0 0 .5rem; font-family: var(--ff-mono); font-size: 1.15rem; }
.post-card p { margin: 0; color: var(--muted); }
.post-card a { display:inline; }

/* ---------------------
   Footer
   --------------------- */
footer {
  width: var(--container);
  margin-inline:auto;
  padding: 2.5rem .75rem 4rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
}
.foot { display:flex; flex-wrap:wrap; gap:.75rem 1rem; align-items:center; justify-content:space-between; }

/* ---------------------
   Responsive
   --------------------- */
@media (max-width: 860px){
  .menu { display:none; }
  .burger { display:grid; }
  .hero { padding-top: 1.2rem; }
}

/* Motion safety */
@media (prefers-reduced-motion: reduce){
  * { transition: none !important; animation: none !important; }
}