/* ObjBit — terminal-dark project site. System fonts only, no external requests. */

:root {
  --bg: #0b0d11;
  --bg-raise: #12151c;
  --bg-panel: #0e1117;
  --line: #232836;
  --text: #d7dbe4;
  --text-dim: #8b93a5;
  --accent: #f7931a;
  --accent-dim: #b96e13;
  --green: #58d98a;
  --red: #f05a5a;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.6;
  font-size: 16.5px;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover, a:focus-visible { text-decoration: underline; }

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

.wrap { max-width: 980px; margin: 0 auto; padding: 0 1.25rem; }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: #000;
  padding: .5rem 1rem;
  z-index: 10;
}
.skip-link:focus { left: 0; }

/* Header */
header.site {
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: rgba(11, 13, 17, .92);
  backdrop-filter: blur(6px);
  z-index: 5;
}
header.site .wrap {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  min-height: 3.4rem;
}
.brand {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
}
.brand .tick { color: var(--accent); }
nav.main { margin-left: auto; }
nav.main ul {
  display: flex;
  gap: 1.35rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
nav.main a { color: var(--text-dim); font-size: .95rem; }
nav.main a:hover, nav.main a:focus-visible { color: var(--text); text-decoration: none; }

/* Hero */
.hero { padding: 4.5rem 0 3rem; }
.hero h1 {
  font-family: var(--mono);
  font-size: clamp(1.7rem, 4.5vw, 2.6rem);
  line-height: 1.2;
  margin: 0 0 1rem;
  letter-spacing: -.02em;
}
.hero h1 .accent { color: var(--accent); }
.hero p.lede {
  color: var(--text-dim);
  max-width: 42rem;
  margin: 0 0 1.75rem;
  font-size: 1.08rem;
}
.hero .cta {
  display: flex;
  gap: .9rem;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}
.btn {
  display: inline-block;
  font-family: var(--mono);
  font-size: .95rem;
  padding: .62rem 1.15rem;
  border-radius: 8px;
  border: 1px solid var(--line);
  color: var(--text);
  background: var(--bg-raise);
}
.btn:hover, .btn:focus-visible { border-color: var(--accent-dim); text-decoration: none; }
.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #14100a;
  font-weight: 700;
}
.btn.primary:hover, .btn.primary:focus-visible { background: #ffa63a; }

/* Chain animation */
.chain-visual {
  font-family: var(--mono);
  font-size: clamp(.55rem, 1.6vw, .85rem);
  line-height: 1.35;
  color: var(--text-dim);
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1.1rem 1.25rem;
  overflow-x: auto;
  margin: 0;
}
.chain-visual .solved { color: var(--green); }
.chain-visual .mining { color: var(--accent); }

/* Sections */
section { padding: 3.25rem 0; border-top: 1px solid var(--line); }
section h2 {
  font-family: var(--mono);
  font-size: 1.35rem;
  margin: 0 0 .4rem;
}
section h2 .hash { color: var(--accent); margin-right: .4rem; }
section > .wrap > p.sub { color: var(--text-dim); margin: 0 0 2rem; max-width: 44rem; }

/* Feature grid */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
}
.card {
  background: var(--bg-raise);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1.15rem 1.25rem;
}
.card h3 {
  font-family: var(--mono);
  font-size: 1rem;
  margin: 0 0 .45rem;
  color: var(--text);
}
.card h3 .glyph { color: var(--accent); margin-right: .45rem; }
.card p { margin: 0; color: var(--text-dim); font-size: .95rem; }
.card code { color: var(--green); font-size: .85em; }

/* Terminal windows */
.term {
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  margin: 0;
}
.term-bar {
  display: flex;
  align-items: center;
  gap: .45rem;
  padding: .55rem .9rem;
  border-bottom: 1px solid var(--line);
  background: var(--bg-raise);
}
.term-bar .dot { width: .68rem; height: .68rem; border-radius: 50%; background: var(--line); }
.term-bar .dot.r { background: #e0574f; }
.term-bar .dot.y { background: #e0a63f; }
.term-bar .dot.g { background: #58b96a; }
.term-bar .title {
  font-family: var(--mono);
  font-size: .78rem;
  color: var(--text-dim);
  margin-left: .5rem;
}
.term pre {
  margin: 0;
  padding: 1rem 1.15rem;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: .8rem;
  line-height: 1.5;
  color: var(--text);
}
.term .p { color: var(--text-dim); }     /* prompt */
.term .ok { color: var(--green); }
.term .warn { color: var(--accent); }
.term .dim { color: var(--text-dim); }
.term .amt { color: var(--accent); }

/* Install / code with copy */
.cmd {
  position: relative;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  display: flex;
  align-items: stretch;
  margin: 1rem 0;
}
.cmd pre {
  margin: 0;
  padding: .95rem 1.1rem;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: .84rem;
  line-height: 1.55;
  flex: 1;
}
.copy-btn {
  font-family: var(--mono);
  font-size: .78rem;
  border: none;
  border-left: 1px solid var(--line);
  background: var(--bg-raise);
  color: var(--text-dim);
  padding: 0 1rem;
  cursor: pointer;
  border-radius: 0 10px 10px 0;
  min-width: 4.6rem;
}
.copy-btn:hover, .copy-btn:focus-visible { color: var(--accent); }
.copy-btn.done { color: var(--green); }

.note {
  border-left: 3px solid var(--accent-dim);
  background: var(--bg-raise);
  padding: .75rem 1rem;
  border-radius: 0 8px 8px 0;
  color: var(--text-dim);
  font-size: .93rem;
}
.note code, li code, p code {
  font-family: var(--mono);
  font-size: .88em;
  background: var(--bg-raise);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: .08em .35em;
  color: var(--text);
}

/* Downloads table */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: .93rem;
}
th, td {
  text-align: left;
  padding: .6rem .75rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
th { color: var(--text-dim); font-weight: 600; font-family: var(--mono); font-size: .8rem; }
td code { word-break: break-all; }

/* Docs page */
article.docs { padding: 2.5rem 0 4rem; }
article.docs h1 { font-family: var(--mono); font-size: 1.8rem; }
article.docs h2 {
  font-family: var(--mono);
  font-size: 1.25rem;
  margin-top: 2.4rem;
  border-top: 1px solid var(--line);
  padding-top: 1.6rem;
}
article.docs pre {
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1rem 1.15rem;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: .84rem;
  line-height: 1.55;
}
article.docs table code { font-size: .8em; }

footer.site {
  border-top: 1px solid var(--line);
  padding: 2rem 0 3rem;
  color: var(--text-dim);
  font-size: .9rem;
}
footer.site .wrap { display: flex; gap: 1.5rem; flex-wrap: wrap; }

@media (max-width: 640px) {
  nav.main ul { gap: .9rem; }
  .hero { padding-top: 3rem; }
}