/* ============================================================
   Lyte Lab — document toolkit site
   Preserves lytelab.ai theme: IBM Plex Mono + Source Serif 4,
   dark warm palette, cream-on-ink, gold accent.
   ============================================================ */

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg: #111214;
  --bg-warm: #14130f;
  --bg-card: #1a1b1e;
  --bg-card-hover: #222324;
  --border: #2c2d30;
  --border-warm: #3a3630;
  --cream: #faf5eb;
  --cream-85: rgba(250, 245, 235, 0.85);
  --cream-75: rgba(250, 245, 235, 0.75);
  --cream-50: rgba(250, 245, 235, 0.50);
  --cream-25: rgba(250, 245, 235, 0.25);
  --cream-12: rgba(250, 245, 235, 0.12);
  --cream-08: rgba(250, 245, 235, 0.08);
  --cream-04: rgba(250, 245, 235, 0.04);
  --accent: #d4b254;
  --accent-soft: rgba(212, 178, 84, 0.22);
  --accent-glow: rgba(212, 178, 84, 0.12);
  --red: #d4685a;
  --green: #6aae7f;
  --blue: #5a8ed4;
  --teal: #5ab8c9;
  --orange: #d4935a;
  --violet: #a07ed4;
  --mono: 'IBM Plex Mono', monospace;
  --serif: 'Source Serif 4', Georgia, serif;
}

html { font-size: 17px; scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--cream-85);
  font-family: var(--serif);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--accent-soft); color: var(--cream); }

a { color: var(--accent); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--cream); }

strong { color: var(--cream); font-weight: 600; }

/* ---- NAV ---- */
nav.site-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 1.25rem 2rem;
  display: flex; justify-content: space-between; align-items: center;
  background: rgba(17, 18, 20, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s;
}
nav.site-nav.scrolled { border-bottom-color: var(--border); }
nav.site-nav .logo {
  font-family: var(--mono);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--cream);
  letter-spacing: 0.08em;
  text-decoration: none;
}
nav.site-nav .logo:hover { color: var(--accent); }
nav.site-nav .nav-links { display: flex; gap: 2rem; list-style: none; align-items: center; }
nav.site-nav .nav-links a {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--cream-50);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
nav.site-nav .nav-links a:hover { color: var(--cream); text-decoration: none; }
nav.site-nav .nav-links a.active { color: var(--accent); }

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--cream-75);
  padding: 0.35rem 0.6rem;
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  border-radius: 2px;
}
.nav-toggle:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ---- LAYOUT ---- */
.container { max-width: 960px; margin: 0 auto; padding: 0 2rem; }
.wide { max-width: 1100px; }

/* ---- HERO ---- */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  position: relative;
  overflow: hidden;
  text-align: center;
  padding: 6rem 0 4rem;
}

.hero::before {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -60%);
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(212, 178, 84, 0.12) 0%, rgba(212, 178, 84, 0.04) 40%, transparent 70%);
  filter: blur(60px);
  pointer-events: none;
}

.hero-content { display: flex; flex-direction: column; align-items: center; position: relative; max-width: 820px; }

.hero-eyebrow {
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  margin-bottom: 1.75rem;
}

.hero h1 {
  font-family: var(--mono);
  font-size: 3.6rem;
  font-weight: 600;
  color: var(--cream);
  letter-spacing: -0.03em;
  line-height: 1.08;
  margin-bottom: 1.5rem;
}

.hero .tagline {
  font-family: var(--serif);
  font-size: 1.2rem;
  font-weight: 400;
  color: var(--cream-85);
  max-width: 640px;
  line-height: 1.7;
  margin-bottom: 0.9rem;
}

.hero .subline {
  font-family: var(--serif);
  font-size: 0.98rem;
  color: var(--cream-50);
  max-width: 600px;
  line-height: 1.65;
  margin-bottom: 2.5rem;
}

.hero-cta {
  display: flex;
  gap: 0.9rem;
  flex-wrap: wrap;
  justify-content: center;
}

.btn {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.85rem 1.5rem;
  border: 1px solid var(--accent);
  color: var(--accent);
  background: transparent;
  transition: all 0.2s;
  cursor: pointer;
}
.btn:hover { background: var(--accent-soft); color: var(--cream); text-decoration: none; border-color: var(--accent); }
.btn-primary { background: var(--accent); color: var(--bg); border-color: var(--accent); }
.btn-primary:hover { background: var(--cream); color: var(--bg); border-color: var(--cream); }
.btn-secondary { border-color: var(--border-warm); color: var(--cream-75); }
.btn-secondary:hover { color: var(--cream); border-color: var(--cream-25); background: var(--cream-04); }

/* ---- SECTIONS ---- */
.section {
  padding: 6rem 0;
  border-top: 1px solid var(--border);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 3rem;
  gap: 1rem;
  flex-wrap: wrap;
}

.section-label {
  font-family: var(--mono);
  font-size: 0.65rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent);
}

.section-count {
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--cream-50);
  letter-spacing: 0.05em;
}

.section-intro {
  max-width: 640px;
  margin-bottom: 3rem;
}

.section-intro h2 {
  font-family: var(--mono);
  font-size: 1.4rem;
  font-weight: 500;
  color: var(--cream);
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}

.section-intro p {
  font-size: 0.98rem;
  color: var(--cream-75);
}

/* ---- CARDS ---- */
.research-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.research-grid.three-up { grid-template-columns: 1fr 1fr 1fr; }

.card {
  --card-accent: var(--accent);
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 0;
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  color: var(--cream-75);
}

.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--card-accent);
  opacity: 0.6;
}

a.card:hover {
  border-color: var(--border-warm);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
  text-decoration: none;
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}

a.card:hover::before { opacity: 1; }

.card .card-viz {
  padding: 1.5rem 1.75rem 0;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
}

.card .card-meta { display: flex; flex-direction: column; min-width: 0; }

.card .number {
  font-family: var(--mono);
  font-size: 0.6rem;
  color: var(--cream-25);
  letter-spacing: 0.1em;
  margin-bottom: 0.4rem;
}

.card .stat {
  font-family: var(--mono);
  font-size: 1.8rem;
  font-weight: 300;
  color: var(--card-accent);
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.card .card-body { padding: 1rem 1.75rem 1.75rem; flex-grow: 1; display: flex; flex-direction: column; }

.card h3 {
  font-family: var(--mono);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--cream);
  margin-bottom: 0.5rem;
  line-height: 1.45;
}

.card p {
  font-size: 0.78rem;
  color: var(--cream-75);
  line-height: 1.6;
  flex-grow: 1;
}

.card .tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.55rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--card-accent);
  border: 1px solid var(--card-accent);
  border-color: color-mix(in srgb, var(--card-accent) 35%, transparent);
  padding: 0.2rem 0.6rem;
  margin-top: 1rem;
  align-self: flex-start;
}

/* Per-capability accent colors (same palette lytelab.ai uses) */
.card[data-accent="teal"]   { --card-accent: #5ab8c9; }
.card[data-accent="orange"] { --card-accent: #d4935a; }
.card[data-accent="red"]    { --card-accent: #d46858; }
.card[data-accent="blue"]   { --card-accent: #5a8ed4; }
.card[data-accent="green"]  { --card-accent: #6aae7f; }
.card[data-accent="violet"] { --card-accent: #a07ed4; }
.card[data-accent="gold"]   { --card-accent: #c9a85a; }

/* ---- DATA TABLES ---- */
.data-section { padding: 6rem 0; border-top: 1px solid var(--border); }

.table-label {
  font-family: var(--mono);
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.table-label::after { content: ''; flex: 1; height: 1px; background: var(--border); }

.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }

.data-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 3.5rem;
  font-size: 0.78rem;
}

.data-table thead th {
  font-family: var(--mono);
  font-size: 0.62rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--cream-25);
  text-align: left;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-warm);
  white-space: nowrap;
}

.data-table tbody td {
  font-family: var(--mono);
  font-size: 0.75rem;
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--cream-04);
  color: var(--cream-75);
  vertical-align: middle;
}

.data-table tbody tr { transition: background 0.15s; }
.data-table tbody tr:hover { background: var(--cream-04); }

.data-table .num { text-align: right; font-variant-numeric: tabular-nums; }
.data-table .accent { color: var(--accent); font-weight: 500; }
.data-table .dim { color: var(--cream-25); }
.data-table .positive { color: var(--green); }
.data-table .negative { color: var(--red); }

.table-footnote {
  font-family: var(--mono);
  font-size: 0.62rem;
  color: var(--cream-25);
  margin-top: -2.5rem;
  margin-bottom: 3.5rem;
  line-height: 1.6;
}

.release-banner {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--cream-85);
  border: 1px solid var(--accent-soft);
  background: rgba(212, 178, 84, 0.04);
  padding: 1rem 1.25rem;
  margin-top: 1rem;
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  align-items: center;
}
.release-banner .k { color: var(--cream-50); letter-spacing: 0.08em; text-transform: uppercase; font-size: 0.6rem; }
.release-banner .v { color: var(--accent); }

/* ---- PRICING ---- */
.price-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

.price-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 2rem 1.75rem;
  position: relative;
  transition: all 0.3s;
}

.price-card:hover { border-color: var(--border-warm); background: var(--bg-card-hover); }

.price-card.featured {
  border-color: var(--accent-soft);
  box-shadow: 0 0 0 1px var(--accent-soft);
}

.price-card .tier {
  font-family: var(--mono);
  font-size: 0.62rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 0.75rem;
}

.price-card h3 {
  font-family: var(--mono);
  font-size: 1.1rem;
  color: var(--cream);
  margin-bottom: 1rem;
  font-weight: 500;
}

.price-card .price {
  font-family: var(--mono);
  font-size: 2.4rem;
  color: var(--accent);
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 0.25rem;
}
.price-card .price small {
  font-size: 0.85rem;
  color: var(--cream-50);
  font-weight: 300;
  display: block;
  margin-top: 0.2rem;
}

.price-card ul { list-style: none; margin: 1.5rem 0 1.75rem; padding: 0; }

.price-card li {
  font-size: 0.85rem;
  padding: 0.45rem 0;
  color: var(--cream-75);
  border-bottom: 1px solid var(--cream-04);
  line-height: 1.5;
}
.price-card li:last-child { border-bottom: 0; }

.price-card .btn { width: 100%; text-align: center; }

.enterprise-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 2.5rem;
  margin-top: 2rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: center;
}

.enterprise-card h3 { font-family: var(--mono); font-size: 1.2rem; color: var(--cream); margin-bottom: 0.75rem; }
.enterprise-card p { color: var(--cream-75); font-size: 0.95rem; }

.enterprise-card .tier-prices { display: flex; flex-direction: column; gap: 1.25rem; }

.enterprise-card .tier-price {
  border: 1px solid var(--border);
  padding: 1rem 1.25rem;
  background: var(--cream-04);
}

.enterprise-card .tier-price .price {
  font-family: var(--mono);
  font-size: 1.5rem;
  color: var(--accent);
  font-weight: 300;
}
.enterprise-card .tier-price .detail {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--cream-50);
  letter-spacing: 0.05em;
  margin-top: 0.25rem;
}

/* ---- PHILOSOPHY ---- */
.philosophy-block {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 3.5rem;
  position: relative;
}

.philosophy-block::before {
  content: '\201C';
  position: absolute;
  top: 1.5rem; left: 2rem;
  font-size: 4rem;
  font-family: var(--serif);
  color: var(--accent-soft);
  line-height: 1;
}

.philosophy-block p {
  font-size: 1.15rem;
  color: var(--cream-85);
  max-width: 640px;
  line-height: 1.85;
  font-style: italic;
}

/* ---- HONEST GAPS ---- */
.gaps-list {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.gaps-list li {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 3px solid var(--red);
  padding: 1rem 1.25rem;
  font-size: 0.88rem;
  color: var(--cream-75);
  line-height: 1.55;
}

.gaps-list li strong {
  display: block;
  font-family: var(--mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--cream);
  margin-bottom: 0.4rem;
}

/* ---- CONTACT ---- */
.contact {
  padding: 6rem 0 8rem;
  border-top: 1px solid var(--border);
  text-align: center;
}

.contact .email {
  font-family: var(--mono);
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--accent);
  display: inline-block;
  margin-bottom: 1.25rem;
  padding-bottom: 0.25rem;
  border-bottom: 1px solid var(--accent-soft);
  transition: border-color 0.3s;
}

.contact .email:hover { border-bottom-color: var(--accent); text-decoration: none; }

.contact p { font-size: 0.95rem; color: var(--cream-50); max-width: 480px; margin: 0 auto; }

/* ---- FOOTER ---- */
.footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.footer p, .footer a {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--cream-75);
  letter-spacing: 0.05em;
}
.footer a { text-decoration: underline; text-decoration-color: var(--cream-25); text-underline-offset: 3px; }
.footer a:hover { color: var(--cream); text-decoration-color: var(--accent); }

.footer .links { display: flex; gap: 1.25rem; flex-wrap: wrap; }

/* ---- PROSE (deep-dive pages) ---- */
.prose { max-width: 740px; margin: 0 auto; }

.prose h1 {
  font-family: var(--mono);
  font-size: 2.4rem;
  color: var(--cream);
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 1rem;
}

.prose .deck {
  font-family: var(--serif);
  font-size: 1.15rem;
  color: var(--cream-75);
  margin-bottom: 2.5rem;
  line-height: 1.65;
}

.prose h2 {
  font-family: var(--mono);
  font-size: 1.15rem;
  color: var(--cream);
  margin-top: 2.75rem;
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}

.prose h3 {
  font-family: var(--mono);
  font-size: 0.9rem;
  color: var(--cream);
  margin-top: 1.75rem;
  margin-bottom: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.prose p {
  font-size: 1.02rem;
  color: var(--cream-85);
  margin-bottom: 1.15rem;
  line-height: 1.75;
}

.prose p a, .prose li a,
p a:not(.btn):not(.email):not(.logo):not(.card),
li a:not(.btn):not(.email):not(.logo):not(.card) {
  text-decoration: underline;
  text-decoration-color: var(--accent-soft);
  text-underline-offset: 3px;
}
.prose p a:hover, .prose li a:hover,
p a:not(.btn):not(.email):hover,
li a:not(.btn):not(.email):hover { text-decoration-color: var(--accent); color: var(--cream); }

.prose ul, .prose ol {
  margin: 0 0 1.2rem 1.25rem;
  color: var(--cream-85);
}

.prose li { margin-bottom: 0.4rem; font-size: 1rem; line-height: 1.65; }

.prose code {
  font-family: var(--mono);
  font-size: 0.85em;
  background: var(--cream-04);
  border: 1px solid var(--cream-08);
  color: var(--accent);
  padding: 0.08em 0.4em;
  border-radius: 2px;
}

.prose pre {
  font-family: var(--mono);
  font-size: 0.8rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--cream-85);
  padding: 1rem 1.25rem;
  margin: 1.25rem 0 1.75rem;
  overflow-x: auto;
  line-height: 1.6;
  border-radius: 2px;
}

.prose pre code { background: transparent; border: 0; color: inherit; padding: 0; }

.prose blockquote {
  border-left: 2px solid var(--accent-soft);
  padding: 0.25rem 0 0.25rem 1.25rem;
  margin: 1.25rem 0;
  color: var(--cream-75);
  font-style: italic;
}

.page-head { padding: 9rem 0 3rem; }

.founder-block {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
  max-width: 680px;
}
.founder-block .founder-text p { color: var(--cream-75); font-size: 0.95rem; line-height: 1.7; margin-bottom: 0.75rem; }
.founder-block .founder-text p:last-child { margin-bottom: 0; }

/* ---- RESPONSIVE ---- */
@media (max-width: 768px) {
  html { font-size: 15px; }
  nav.site-nav { padding: 1rem 1.25rem; }
  nav.site-nav .nav-links { display: none; }
  nav.site-nav .nav-links.open {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0.75rem;
    padding: 1rem 1.25rem 1.25rem;
    background: rgba(17, 18, 20, 0.96);
    border-bottom: 1px solid var(--border);
  }
  .nav-toggle { display: inline-block; }

  .hero { min-height: 85vh; padding: 6rem 0 3rem; }
  .hero h1 { font-size: 2.4rem; }
  .hero .tagline { font-size: 1.02rem; }
  .hero .subline { font-size: 0.92rem; }
  .container { padding: 0 1.25rem; }

  .research-grid, .research-grid.three-up { grid-template-columns: 1fr; }
  .card .card-viz { padding: 1.25rem 1.25rem 0; }
  .card .card-body { padding: 0.75rem 1.25rem 1.25rem; }
  .card .stat { font-size: 1.4rem; }

  .section { padding: 4rem 0; }
  .data-section { padding: 4rem 0; }

  .data-table { font-size: 0.7rem; }
  .data-table thead th, .data-table tbody td { padding: 0.5rem 0.5rem; }

  .philosophy-block { padding: 2.25rem; }
  .philosophy-block p { font-size: 1rem; }

  .price-grid { grid-template-columns: 1fr; }
  .enterprise-card { grid-template-columns: 1fr; padding: 1.75rem; }

  .gaps-list { grid-template-columns: 1fr; }

  .footer { flex-direction: column; align-items: flex-start; gap: 0.75rem; }

  .prose h1 { font-size: 1.8rem; }
  .page-head { padding: 7rem 0 2rem; }
}

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

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0);
  white-space: nowrap; border: 0;
}

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