/* Stratum Software - site styles */
:root {
  --iron: #1a1d23;
  --iron-2: #15181d;
  --graphite: #23272f;
  --steel: #2d3240;
  --slate: #3d4456;
  --mid: #6b7280;
  --ash: #9ca3af;
  --fog: #d1d5db;
  --chalk: #f3f4f6;
  --white: #ffffff;
  --signal: #2563eb;
  --signal-light: #3b82f6;
  --signal-deep: #1e40af;
  --signal-glow: rgba(37,99,235,0.18);
  --pass: #16a34a;
  --warn: #d97706;
  --fail: #dc2626;
  --teal: #0d9488;
  --pass-ink: #15803d;   /* darker Pass, for legibility on white surfaces */
  --warn-light: #fbbf24; /* Warning, lightened for dark chips */
  --hairline: rgba(255,255,255,0.06);
  --hairline-2: rgba(255,255,255,0.10);
  --font-display: 'Archivo', sans-serif;
  --font-body: 'Plus Jakarta Sans', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --maxw: 1240px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font-body);
  background: var(--iron);
  color: var(--fog);
  line-height: 1.6;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; }

/* Visible keyboard focus across interactive elements */
a:focus-visible, button:focus-visible, summary:focus-visible, select:focus-visible, [tabindex]:focus-visible {
  outline: 2px solid var(--signal-light);
  outline-offset: 2px;
  border-radius: 4px;
}

/* === Strata logomark === */
.mark {
  display: inline-block;
  position: relative;
  width: var(--mark-w, 28px);
  height: var(--mark-h, 28px);
  flex: none;
}
.mark span {
  position: absolute;
  left: 0;
  height: calc(var(--mark-h, 28px) * 0.18);
  border-radius: 1.5px;
  background: var(--mark-color, var(--signal));
}
.mark span:nth-child(1) { bottom: 0; width: 100%; opacity: 0.4; }
.mark span:nth-child(2) { bottom: calc(var(--mark-h, 28px) * 0.41); width: 80%; opacity: 0.7; }
.mark span:nth-child(3) { bottom: calc(var(--mark-h, 28px) * 0.82); width: 55%; }

/* === Nav === */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 0.95rem 2rem;
  display: flex; justify-content: space-between; align-items: center;
  background: rgba(21,24,29,0.78);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--hairline);
}
.nav-brand { display: flex; align-items: center; gap: 0.65rem; }
.nav-brand .word {
  font-family: var(--font-display); font-weight: 800;
  font-size: 1rem; letter-spacing: -0.01em; color: var(--white);
}
.nav-brand .word .sub { font-weight: 500; opacity: 0.6; }
.nav-links { display: flex; gap: 2rem; align-items: center; }
.nav-links a {
  font-size: 0.82rem; font-weight: 500; color: var(--ash);
  transition: color 0.2s;
}
.nav-links a:hover, .nav-links a.is-active { color: var(--white); }
.nav-cta {
  font-family: var(--font-display); font-weight: 600;
  font-size: 0.78rem; letter-spacing: 0.01em;
  padding: 0.55rem 1rem; border-radius: 8px;
  background: var(--signal); color: var(--white) !important;
  border: 1px solid var(--signal-light);
  transition: background 0.2s, transform 0.15s;
}
.nav-cta:hover { background: var(--signal-light); }

/* === Mobile nav === */
.nav-toggle {
  display: none;
  background: none; border: none;
  color: var(--ash); padding: 0.25rem;
}
.nav-toggle svg { width: 24px; height: 24px; }
.nav-mobile {
  display: none;
  position: fixed; top: 56px; left: 0; right: 0; bottom: 0;
  background: rgba(21,24,29,0.96);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  z-index: 99; padding: 2rem;
  flex-direction: column; gap: 1.5rem;
}
.nav-mobile.open { display: flex; }
.nav-mobile a {
  font-size: 1.1rem; font-weight: 500; color: var(--fog);
  padding: 0.75rem 0; border-bottom: 1px solid var(--hairline);
}
.nav-mobile a:hover { color: var(--white); }

/* === Buttons === */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: var(--font-display); font-weight: 600;
  font-size: 0.92rem; letter-spacing: 0.005em;
  padding: 0.95rem 1.4rem; border-radius: 10px;
  border: 1px solid transparent;
  transition: background 0.2s, border-color 0.2s, transform 0.15s, color 0.2s;
}
.btn .arr { transition: transform 0.18s; display: inline-block; }
.btn:hover .arr { transform: translateX(3px); }
.btn-primary {
  background: var(--signal); color: var(--white);
  border-color: var(--signal-light);
  box-shadow: 0 0 0 1px rgba(37,99,235,0.3), 0 8px 24px -8px rgba(37,99,235,0.6);
}
.btn-primary:hover { background: var(--signal-light); }
.btn-ghost {
  background: transparent; color: var(--white);
  border-color: var(--hairline-2);
}
.btn-ghost:hover { border-color: rgba(255,255,255,0.25); background: rgba(255,255,255,0.02); }
.btn-light {
  background: var(--white); color: var(--iron);
}
.btn-light:hover { background: var(--chalk); }
.btn-link {
  display: inline-flex; align-items: center; gap: 0.4rem;
  font-family: var(--font-display); font-weight: 600;
  font-size: 0.85rem; color: var(--signal-light);
  border-bottom: 1px solid rgba(59,130,246,0.3);
  padding-bottom: 2px;
  transition: color 0.2s, border-color 0.2s;
}
.btn-link:hover { color: var(--white); border-color: var(--white); }
.btn-link .arr { transition: transform 0.18s; }
.btn-link:hover .arr { transform: translateX(3px); }

/* === Layout === */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 2rem; }
.section { padding: 7rem 0; position: relative; }
.section.sm { padding: 4.5rem 0; }
.section.alt { background: var(--iron-2); }
.divider { height: 1px; background: linear-gradient(90deg, transparent, var(--hairline), transparent); }

.eyebrow {
  display: inline-flex; align-items: center; gap: 0.55rem;
  font-family: var(--font-mono); font-size: 0.7rem; font-weight: 600;
  letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--signal-light); margin-bottom: 1.25rem;
}
.eyebrow::before {
  content: ''; display: inline-block;
  width: 8px; height: 1px; background: var(--signal-light);
}
.h1 {
  font-family: var(--font-display); font-weight: 900;
  font-size: clamp(2.6rem, 5.8vw, 4.5rem);
  line-height: 1.02; letter-spacing: -0.03em; color: var(--white);
}
.h2 {
  font-family: var(--font-display); font-weight: 800;
  font-size: clamp(1.9rem, 3.4vw, 2.85rem);
  line-height: 1.08; letter-spacing: -0.022em; color: var(--white);
}
.h3 {
  font-family: var(--font-display); font-weight: 700;
  font-size: 1.35rem; line-height: 1.2;
  letter-spacing: -0.012em; color: var(--white);
}
.lede {
  font-size: 1.15rem; color: var(--ash); line-height: 1.65;
  max-width: 60ch;
}
.lede.lg { font-size: 1.25rem; max-width: 62ch; }
.body { color: var(--ash); line-height: 1.75; font-size: 1rem; }
.body p + p { margin-top: 1.05rem; }
.kicker {
  font-family: var(--font-mono); font-size: 0.7rem; font-weight: 600;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--signal-light);
}

/* === Hero === */
.hero {
  position: relative; padding-top: 11rem; padding-bottom: 6rem;
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0; pointer-events: none; z-index: 0;
}
.hero-bg .grid {
  position: absolute; inset: 0; opacity: 0.04;
  background-image:
    linear-gradient(var(--signal) 1px, transparent 1px),
    linear-gradient(90deg, var(--signal) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 30%, transparent 80%);
}
.hero-bg .glow {
  position: absolute; inset: -10% -10% 30% -10%;
  background: radial-gradient(ellipse 60% 55% at 50% 30%, rgba(37,99,235,0.12), transparent 70%);
}
.hero-bg .strata {
  position: absolute; left: 0; right: 0; bottom: 0; height: 50%;
  background:
    repeating-linear-gradient(180deg,
      transparent 0,
      transparent 119px,
      rgba(37,99,235,0.05) 119px,
      rgba(37,99,235,0.05) 120px);
  mask-image: linear-gradient(to top, black, transparent);
}
.hero .wrap { position: relative; z-index: 1; }
.hero-tag {
  display: inline-flex; align-items: center; gap: 0.55rem;
  padding: 0.4rem 0.85rem;
  border: 1px solid rgba(37,99,235,0.3);
  background: rgba(37,99,235,0.06);
  border-radius: 999px;
  font-family: var(--font-mono); font-size: 0.7rem;
  letter-spacing: 0.06em; color: var(--signal-light);
  margin-bottom: 1.75rem;
}
.hero-tag .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--signal); box-shadow: 0 0 10px var(--signal);
}
.hero h1 { max-width: 16ch; }
.hero h1 .accent {
  background: linear-gradient(135deg, var(--signal-light), var(--teal));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.hero p.lede { margin-top: 1.6rem; }
.hero-ctas { margin-top: 2.4rem; display: flex; gap: 0.85rem; flex-wrap: wrap; }
.hero-meta {
  margin-top: 3.5rem; display: flex; gap: 2rem;
  font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.04em;
  color: var(--ash); flex-wrap: wrap;
  border-top: 1px solid var(--hairline); padding-top: 1.5rem;
}
.hero-meta strong { color: var(--white); font-weight: 600; margin-right: 0.4rem; }

/* === Cards === */
.card {
  background: var(--graphite);
  border: 1px solid var(--hairline);
  border-radius: 14px;
  padding: 2rem;
  transition: border-color 0.25s, transform 0.25s, background 0.25s;
}
.card:hover { border-color: var(--hairline-2); }

.feature-tile {
  display: flex; flex-direction: column; gap: 1rem;
  padding: 1.85rem; border-radius: 14px;
  border: 1px solid var(--hairline); background: var(--graphite);
  position: relative; overflow: hidden;
}
.feature-tile .num {
  font-family: var(--font-mono); font-size: 0.7rem;
  color: var(--signal-light); letter-spacing: 0.1em;
}
.feature-tile h4 {
  font-family: var(--font-display); font-weight: 700; font-size: 1.1rem;
  color: var(--white); line-height: 1.25;
}
.feature-tile p { color: var(--ash); font-size: 0.93rem; line-height: 1.6; }

/* === Forms === */
.field { margin-bottom: 1.25rem; }
.field label {
  display: block;
  font-family: var(--font-mono); font-size: 0.68rem;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--ash); margin-bottom: 0.5rem;
}
.field input, .field select, .field textarea {
  width: 100%; padding: 0.85rem 1rem;
  background: var(--iron); color: var(--white);
  border: 1px solid var(--hairline-2);
  border-radius: 8px;
  font-family: var(--font-body); font-size: 0.95rem;
  transition: border-color 0.2s;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--signal);
  box-shadow: 0 0 0 3px var(--signal-glow);
}
.field textarea { resize: vertical; min-height: 100px; }
.field select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%239ca3af' d='M2 4l4 4 4-4'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 1rem center; padding-right: 2.5rem; }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }

/* === Footer === */
.footer {
  border-top: 1px solid var(--hairline);
  padding: 4.5rem 0 2.5rem;
  background: var(--iron-2);
}
.footer-grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 3rem; margin-bottom: 3rem;
}
.footer-brand .word {
  font-family: var(--font-display); font-weight: 800;
  font-size: 1.1rem; color: var(--white); margin-top: 0.6rem;
}
.footer-brand .word .sub { font-weight: 500; opacity: 0.6; }
.footer-brand p { font-size: 0.88rem; color: var(--ash); margin-top: 0.85rem; max-width: 32ch; }
.footer-col h5 {
  font-family: var(--font-mono); font-size: 0.68rem;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--ash); margin-bottom: 1rem;
}
.footer-col a {
  display: block; font-size: 0.9rem; color: var(--fog);
  padding: 0.32rem 0; transition: color 0.2s;
}
.footer-col a:hover { color: var(--white); }
.footer-bot {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 2rem; border-top: 1px solid var(--hairline);
  font-family: var(--font-mono); font-size: 0.72rem;
  letter-spacing: 0.05em; color: var(--mid); flex-wrap: wrap; gap: 1rem;
}

/* === Generic utilities === */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.25rem; }
.text-center { text-align: center; }
.center-block { margin-left: auto; margin-right: auto; }

/* === Animations === */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}
/* Content is visible by default; only hidden-then-revealed when JS is confirmed,
   so a stalled or blocked script never leaves the page blank. */
.reveal { opacity: 1; }
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.7s ease, transform 0.7s ease; }
.js .reveal.in { opacity: 1; transform: translateY(0); }

/* === Responsive === */
@media (max-width: 960px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .nav-links { display: none; }
  .nav-toggle { display: block; }
  .section { padding: 5rem 0; }
  .hero { padding-top: 8.5rem; padding-bottom: 4rem; }
}
@media (max-width: 600px) {
  .nav { padding: 0.85rem 1.25rem; }
  .wrap { padding: 0 1.25rem; }
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  .hero-meta { gap: 1rem; }
  .row2 { grid-template-columns: 1fr; }
}

/* === Hero note + form helpers === */
.hero-note {
  margin-top: 1rem; font-family: var(--font-mono);
  font-size: 0.72rem; letter-spacing: 0.02em; color: var(--ash);
}
.hero-note a { color: var(--signal-light); }
.req { color: var(--signal-light); }
.form-hint { margin-top: 0.85rem; font-size: 0.8rem; color: var(--ash); line-height: 1.5; }
/* Honeypot: present in the DOM, hidden from people */
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
/* Inline form error message */
.form-error {
  margin-top: 0.85rem; font-size: 0.85rem; color: var(--fail);
  font-weight: 600;
}
/* Persistent form success confirmation */
.form-success {
  padding: 1.5rem 1.75rem; border-radius: 12px;
  border: 1px solid rgba(22,163,74,0.4); background: rgba(22,163,74,0.08);
  color: var(--fog); line-height: 1.6;
}
.form-success strong { color: var(--white); font-weight: 700; display: block; margin-bottom: 0.35rem; }
.form-hint a { color: var(--signal-light); }
/* Optional file attachment */
.field label .opt { text-transform: none; letter-spacing: 0.02em; color: var(--ash); font-weight: 400; }
.field input[type="file"] {
  width: 100%; padding: 0.7rem 0.85rem;
  background: var(--iron); color: var(--ash);
  border: 1px dashed var(--hairline-2); border-radius: 8px;
  font-family: var(--font-body); font-size: 0.9rem; cursor: pointer;
}
.field input[type="file"]::file-selector-button {
  margin-right: 0.85rem; padding: 0.4rem 0.85rem;
  background: var(--graphite); color: var(--white);
  border: 1px solid var(--hairline-2); border-radius: 6px;
  font-family: var(--font-display); font-weight: 600; font-size: 0.8rem; cursor: pointer;
}
.field input[type="file"]:focus-visible { outline: 2px solid var(--signal-light); outline-offset: 2px; }