/* ===== Tenacious Engineering Standards - brand + landing page ===== */

/* Brand palette taken from the Tenacious Intelligence firefly logo:
   purple mark #5B52A8, navy wordmark #1F2A6E */
:root {
  --md-primary-fg-color:        #1F2A6E;  /* navy - header / primary */
  --md-primary-fg-color--light: #5B52A8;  /* purple */
  --md-primary-fg-color--dark:  #161E54;
  --md-accent-fg-color:         #5B52A8;  /* purple - links / accents */
  --ten-purple:                 #5B52A8;
  --ten-navy:                   #1F2A6E;
  --ten-radius: 14px;
  --ten-border: var(--md-default-fg-color--lightest);
}

/* Slightly tighter, more "product" heading rhythm */
.md-typeset h1 {
  font-weight: 800;
  letter-spacing: -0.02em;
}
.md-typeset h2 {
  font-weight: 700;
  letter-spacing: -0.01em;
}

/* ---------- Hero ---------- */
.ten-hero {
  position: relative;
  margin: -1.2rem -0.8rem 2.5rem;
  padding: 4rem 1.5rem 3.5rem;
  border-radius: var(--ten-radius);
  text-align: center;
  color: #fff;
  background:
    radial-gradient(1200px 400px at 50% -10%, rgba(91, 82, 168, 0.65), transparent 60%),
    linear-gradient(135deg, #161E54 0%, #1F2A6E 50%, #5B52A8 100%);
  overflow: hidden;
}
.ten-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.06) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: radial-gradient(60% 80% at 50% 0%, #000, transparent 75%);
  pointer-events: none;
}
.ten-hero > * { position: relative; z-index: 1; }

.ten-hero-logo {
  display: inline-block;
  margin: 0 auto 1.6rem;
  padding: 1rem 1.6rem;
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.28);
}
.ten-hero-logo img {
  display: block;
  height: 52px;
  width: auto;
}
/* Markdown wraps the logo in a <p>, which the content-page rule caps at 74ch;
   centre that box so the logo card sits on the hero's centre line. */
.md-typeset .ten-hero p {
  margin-left: auto;
  margin-right: auto;
}

.ten-hero .ten-eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.72rem;
  font-weight: 700;
  opacity: 0.85;
  margin: 0 0 0.6rem;
}
/* The .md-typeset prefix outranks the content-page h1 rule further down
   (underline, inline-block, smaller size), which would otherwise win on source order. */
.md-typeset .ten-hero h1 {
  display: block;
  color: #fff;
  font-size: 2.5rem;
  line-height: 1.1;
  margin: 0 auto 0.8rem;
  padding-bottom: 0;
  border-bottom: none;
  max-width: 18ch;
  font-weight: 800;
  letter-spacing: -0.03em;
}
/* The permalink is invisible on the dark hero but still takes up space,
   pushing the centred title off-centre. */
.md-typeset .ten-hero .headerlink { display: none; }
.ten-hero p.ten-sub {
  color: rgba(255, 255, 255, 0.92);
  font-size: 1.05rem;
  max-width: 56ch;
  margin: 0 auto 1.8rem;
}

/* Hero buttons */
.ten-cta {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}
.ten-cta .md-button {
  border-radius: 999px;
  padding: 0.55rem 1.4rem;
  font-weight: 600;
}
.ten-cta .md-button--primary {
  background: #fff;
  color: var(--md-primary-fg-color--dark);
  border-color: #fff;
}
.ten-cta .md-button--primary:hover {
  background: rgba(255, 255, 255, 0.9);
  color: var(--md-primary-fg-color--dark);
}
.ten-cta .md-button:not(.md-button--primary) {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.6);
}
.ten-cta .md-button:not(.md-button--primary):hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: #fff;
}

/* ---------- Feature cards ---------- */
.ten-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0 2rem;
}
.ten-card {
  display: block;
  padding: 1.25rem 1.25rem 1.1rem;
  border: 1px solid var(--ten-border);
  border-radius: var(--ten-radius);
  background: var(--md-default-bg-color);
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
  color: inherit !important;
  text-decoration: none !important;
}
.ten-card:hover {
  transform: translateY(-3px);
  border-color: var(--ten-purple);
  box-shadow: 0 10px 30px rgba(91, 82, 168, 0.18);
}
.ten-card .ten-card-icon {
  font-size: 1.6rem;
  line-height: 1;
  display: block;
  margin-bottom: 0.6rem;
}
.ten-card h3 {
  margin: 0 0 0.35rem;
  font-size: 1rem;
  font-weight: 700;
}
.ten-card p {
  margin: 0;
  font-size: 0.83rem;
  color: var(--md-default-fg-color--light);
  line-height: 1.45;
}

@media screen and (max-width: 44.9em) {
  .md-typeset .ten-hero h1 { font-size: 1.9rem; }
  .ten-hero-logo img { height: 44px; }
  .ten-hero { padding: 2.75rem 1rem 2.5rem; }
}

/* ---------- Content pages: readability polish ---------- */

/* Comfortable reading measure + rhythm */
.md-typeset { line-height: 1.7; }
.md-typeset p,
.md-typeset li { max-width: 74ch; }

/* Page title gets a touch more presence and a branded underline accent */
.md-typeset h1 {
  font-size: 2.1rem;
  margin-bottom: 1.4rem;
  padding-bottom: 0.6rem;
  border-bottom: 3px solid var(--ten-purple);
  display: inline-block;
}

/* Lead paragraph: the first paragraph after the H1 reads as a calm intro */
.md-typeset h1 + p {
  font-size: 1.12rem;
  line-height: 1.6;
  color: var(--md-default-fg-color--light);
  max-width: 70ch;
}

/* Section headings: clear separation without heavy lines */
.md-typeset h2 {
  margin-top: 2.6rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--ten-border);
}
.md-typeset h3 { margin-top: 1.8rem; }

/* Inline code: subtle brand tint so it reads as "literal" without shouting */
.md-typeset code {
  background: rgba(91, 82, 168, 0.10);
  border-radius: 6px;
  padding: 0.1em 0.35em;
}
.md-typeset pre code { background: none; padding: 0; }

/* Tables: lighter, card-like, with zebra rows and a branded header */
.md-typeset table:not([class]) {
  border: 1px solid var(--ten-border);
  border-radius: var(--ten-radius);
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(31, 42, 110, 0.05);
}
.md-typeset table:not([class]) th {
  background: rgba(31, 42, 110, 0.05);
  font-weight: 700;
}
.md-typeset table:not([class]) tr:nth-child(2n) td {
  background: var(--md-default-fg-color--lightest);
}

/* Admonitions: rounder corners and a softer card feel */
.md-typeset .admonition,
.md-typeset details {
  border-radius: var(--ten-radius);
  border-width: 1px;
  box-shadow: 0 2px 12px rgba(31, 42, 110, 0.06);
}

/* Task lists / checklists: clearer, roomier line spacing */
.md-typeset .task-list-item { margin-bottom: 0.35rem; }
.md-typeset .task-list-control { margin-right: 0.2rem; }

/* Links inside content stay on-brand and underline on hover for clarity */
.md-typeset a {
  color: var(--ten-purple);
  text-decoration-color: rgba(91, 82, 168, 0.35);
}
.md-typeset a:hover { text-decoration: underline; }

/* Roomier lists so multi-line standards bullets breathe */
.md-typeset ul li,
.md-typeset ol li { margin-bottom: 0.4rem; }

/* Permalink anchors: hidden until you hover the heading, in brand purple */
.md-typeset .headerlink { color: var(--ten-border); transition: color 0.15s ease; }
.md-typeset h1:hover .headerlink,
.md-typeset h2:hover .headerlink,
.md-typeset h3:hover .headerlink { color: var(--ten-purple); }

/* Code blocks: soft border + rounded corners so they sit as tidy cards */
.md-typeset pre > code {
  border-radius: var(--ten-radius);
}
.md-typeset .highlight {
  border-radius: var(--ten-radius);
  box-shadow: 0 2px 12px rgba(31, 42, 110, 0.06);
}

/* Footer prev/next nav: a little more padding for an easier target */
.md-footer__inner { padding: 1rem 0.2rem; }