/* scaleops.ai — shared stylesheet */

:root {
  --bg: #0c0c11;
  --surface: #13131a;
  --surface-2: #191922;
  --border: #23232e;
  --accent: #6366f1;
  --accent-soft: #8b8df5;
  --text: #c8c8d4;
  --heading: #ececf4;
  --muted: #6e6e82;

  --font-body: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --font-display: "Newsreader", Georgia, "Times New Roman", serif;

  --w-wide: 1100px;
  --w-read: 720px;
}

*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.7;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* ---------- links & focus ---------- */

a {
  color: var(--accent-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(99, 102, 241, 0.32);
  transition: color 0.14s ease, border-color 0.14s ease;
}

a:hover {
  color: #adaefb;
  border-bottom-color: var(--accent);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: #fff;
  padding: 0.6rem 1rem;
  z-index: 100;
  border: 0;
}

.skip-link:focus {
  left: 0.75rem;
  top: 0.75rem;
}

/* ---------- layout ---------- */

.wrap {
  width: 100%;
  max-width: var(--w-wide);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.wrap-read {
  width: 100%;
  max-width: var(--w-read);
  margin: 0 auto;
  padding: 0 1.5rem;
}

main { display: block; }

/* ---------- header ---------- */

.site-header {
  border-bottom: 1px solid var(--border);
  background: rgba(12, 12, 17, 0.92);
  backdrop-filter: saturate(140%) blur(8px);
  position: sticky;
  top: 0;
  z-index: 40;
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: 62px;
  flex-wrap: wrap;
}

.brand {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--heading);
  border: 0;
  white-space: nowrap;
}

.brand span { color: var(--accent); }

.brand:hover { color: #fff; }

.site-nav {
  display: flex;
  gap: 1.15rem;
  flex-wrap: wrap;
  align-items: center;
}

.site-nav a {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  text-transform: lowercase;
  color: var(--muted);
  border: 0;
  padding: 0.35rem 0;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--heading);
}

.site-nav a[aria-current="page"] {
  box-shadow: inset 0 -2px 0 var(--accent);
}

/* ---------- hero / page intro ---------- */

.masthead {
  padding: 4.5rem 0 3rem;
  border-bottom: 1px solid var(--border);
}

.masthead h1 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(2.1rem, 5.2vw, 3.15rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--heading);
  margin: 0 0 1rem;
  max-width: 20ch;
}

.masthead p {
  margin: 0;
  max-width: 62ch;
  color: var(--muted);
  font-size: 1.05rem;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 1.1rem;
}

/* ---------- article grid ---------- */

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin: 3.25rem 0 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

.section-head h2 {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 500;
  margin: 0;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}

.card {
  background: var(--surface);
  padding: 1.6rem 1.5rem 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  transition: background 0.15s ease;
}

.card:hover { background: var(--surface-2); }

.card h3 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.32rem;
  line-height: 1.25;
  letter-spacing: -0.012em;
  margin: 0;
}

.card h3 a {
  color: var(--heading);
  border: 0;
}

.card h3 a:hover { color: var(--accent-soft); }

.card p {
  margin: 0;
  font-size: 0.94rem;
  color: var(--muted);
  line-height: 1.62;
}

.meta {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  display: flex;
  gap: 0.6rem;
  align-items: center;
  flex-wrap: wrap;
}

.meta a { color: var(--muted); border: 0; }
.meta a:hover { color: var(--accent-soft); }
.meta .dot { opacity: 0.4; }

.tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-soft);
  border: 1px solid rgba(99, 102, 241, 0.28);
  border-radius: 2px;
  padding: 0.12rem 0.45rem;
  background: rgba(99, 102, 241, 0.07);
}

a.tag:hover {
  background: rgba(99, 102, 241, 0.16);
  border-color: var(--accent);
}

/* lead card (first item on index) */

.lead {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 2.25rem 2rem 2.4rem;
  margin-top: 2.5rem;
}

.lead h2 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.7rem, 3.6vw, 2.25rem);
  line-height: 1.18;
  letter-spacing: -0.018em;
  margin: 0.85rem 0 0.9rem;
}

.lead h2 a { color: var(--heading); border: 0; }
.lead h2 a:hover { color: var(--accent-soft); }

.lead p {
  margin: 0;
  max-width: 68ch;
  color: var(--text);
  font-size: 1.02rem;
}

/* compact list (topic pages, related) */

.list { list-style: none; margin: 0; padding: 0; }

.list li {
  padding: 1.35rem 0;
  border-bottom: 1px solid var(--border);
}

.list li:first-child { padding-top: 0.5rem; }

.list h3 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.28rem;
  line-height: 1.28;
  letter-spacing: -0.012em;
  margin: 0.5rem 0 0.5rem;
}

.list h3 a { color: var(--heading); border: 0; }
.list h3 a:hover { color: var(--accent-soft); }

.list p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  max-width: 72ch;
}

/* ---------- topic strip ---------- */

.topic-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.75rem 0 0;
}

/* ---------- article page ---------- */

.article-header {
  padding: 3.5rem 0 2rem;
}

.article-header h1 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(2rem, 5vw, 2.8rem);
  line-height: 1.14;
  letter-spacing: -0.022em;
  color: var(--heading);
  margin: 0.9rem 0 1.1rem;
}

.standfirst {
  font-size: 1.12rem;
  line-height: 1.62;
  color: var(--text);
  margin: 0 0 1.5rem;
}

.article-body { padding-bottom: 3rem; }

.article-body h2 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.62rem;
  line-height: 1.25;
  letter-spacing: -0.015em;
  color: var(--heading);
  margin: 2.9rem 0 0.9rem;
}

.article-body h3 {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1.08rem;
  letter-spacing: 0.005em;
  color: var(--heading);
  margin: 2rem 0 0.65rem;
}

.article-body p { margin: 0 0 1.3rem; }

.article-body ul,
.article-body ol {
  margin: 0 0 1.4rem;
  padding-left: 1.35rem;
}

.article-body li { margin-bottom: 0.55rem; }

.article-body strong { color: var(--heading); font-weight: 600; }

.article-body blockquote {
  margin: 1.9rem 0;
  padding: 0.2rem 0 0.2rem 1.25rem;
  border-left: 2px solid var(--accent);
  color: var(--heading);
  font-family: var(--font-display);
  font-size: 1.18rem;
  line-height: 1.45;
}

.article-body blockquote p:last-child { margin-bottom: 0; }

hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 2.75rem 0;
}

/* ---------- code ---------- */

code {
  font-family: var(--font-mono);
  font-size: 0.87em;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 0.08em 0.35em;
  color: #d9d9ea;
}

pre {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1.15rem 1.25rem;
  overflow-x: auto;
  margin: 0 0 1.5rem;
  font-size: 0.83rem;
  line-height: 1.65;
  -webkit-overflow-scrolling: touch;
}

pre code {
  background: none;
  border: 0;
  padding: 0;
  font-size: inherit;
  color: #c3c3d6;
  white-space: pre;
}

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

/* ---------- tables ---------- */

.table-scroll {
  overflow-x: auto;
  margin: 0 0 1.6rem;
  border: 1px solid var(--border);
  -webkit-overflow-scrolling: touch;
}

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.88rem;
  min-width: 520px;
}

th, td {
  text-align: left;
  padding: 0.7rem 0.9rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

th {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 500;
  background: var(--surface);
}

tbody tr:last-child td { border-bottom: 0; }

/* ---------- callout ---------- */

.note {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 2px solid var(--accent);
  padding: 1.15rem 1.25rem;
  margin: 0 0 1.6rem;
  font-size: 0.95rem;
}

.note p:last-child { margin-bottom: 0; }

/* ---------- related ---------- */

.related {
  border-top: 1px solid var(--border);
  padding: 2.25rem 0 0;
  margin-top: 2.5rem;
}

.related h2 {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 500;
  margin: 0 0 1rem;
}

.related ul { list-style: none; margin: 0; padding: 0; }

.related li { margin-bottom: 0.7rem; }

.related li a {
  font-family: var(--font-display);
  font-size: 1.08rem;
  color: var(--heading);
  border: 0;
}

.related li a:hover { color: var(--accent-soft); }

/* ---------- ads ---------- */

.ad-slot {
  margin: 2.5rem 0;
  min-height: 90px;
  text-align: center;
}

.ad-slot::before {
  content: "Advertisement";
  display: block;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  opacity: 0.6;
  margin-bottom: 0.5rem;
}

/* ---------- static pages ---------- */

.page-body h2 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.5rem;
  letter-spacing: -0.014em;
  color: var(--heading);
  margin: 2.6rem 0 0.85rem;
}

.page-body h3 {
  font-weight: 600;
  font-size: 1.03rem;
  color: var(--heading);
  margin: 1.8rem 0 0.6rem;
}

.page-body p { margin: 0 0 1.25rem; }

.page-body ul { margin: 0 0 1.4rem; padding-left: 1.35rem; }

.page-body li { margin-bottom: 0.5rem; }

.page-body dl { margin: 0 0 1.5rem; }
.page-body dt { color: var(--heading); font-weight: 600; margin-top: 1rem; }
.page-body dd { margin: 0.3rem 0 0; color: var(--text); }

.contact-block {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 1.5rem;
  margin: 0 0 1.5rem;
}

.contact-block h3 { margin-top: 0; }
.contact-block p:last-child { margin-bottom: 0; }

.mono-inline {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

/* ---------- footer ---------- */

.site-footer {
  border-top: 1px solid var(--border);
  margin-top: 4rem;
  padding: 2.5rem 0 3rem;
  background: var(--surface);
}

.footer-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 2.5rem;
  justify-content: space-between;
}

.footer-col h2 {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 500;
  margin: 0 0 0.8rem;
}

.footer-col ul { list-style: none; margin: 0; padding: 0; }

.footer-col li { margin-bottom: 0.45rem; }

.footer-col a {
  font-size: 0.9rem;
  color: var(--text);
  border: 0;
}

.footer-col a:hover { color: var(--accent-soft); }

.footer-base {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--muted);
}

.footer-base a { color: var(--muted); border: 0; }
.footer-base a:hover { color: var(--accent-soft); }

/* ---------- responsive ---------- */

@media (max-width: 780px) {
  body { font-size: 16.5px; }
  .masthead { padding: 3rem 0 2.25rem; }
  .lead { padding: 1.6rem 1.35rem 1.75rem; }
  .card { padding: 1.35rem 1.25rem 1.5rem; }
  .article-header { padding: 2.5rem 0 1.5rem; }
  .site-header .wrap { padding-top: 0.6rem; padding-bottom: 0.6rem; }
}

@media (max-width: 520px) {
  .wrap, .wrap-read { padding: 0 1.1rem; }
  .grid { grid-template-columns: 1fr; }
  .site-nav { gap: 0.85rem; }
  .footer-grid { gap: 1.75rem; }
}