/* EvidentGrid marketing site
   Identity shared with the product itself (see the app's static/style.css):
   deep ink-blue base, teal for confirmed/evidence, amber for attention,
   red for critical (used sparingly), blue for informational links.
   Headlines set in IBM Plex Mono - deliberate choice for an audience that
   reads logs and terminals all day; body copy in IBM Plex Sans as a calm
   counterpoint. Signature element: the hero's animated "evidence graph",
   dramatizing the product's real mechanic (scattered signals resolving
   into one explained, confidence-scored incident) rather than a generic
   dashboard mockup. */

:root {
  --bg: #0a0f16;
  --panel: #101826;
  --panel-2: #141f2f;
  --line: #223046;
  --text: #dce6f2;
  --text-dim: #7f93ac;
  --teal: #35d1a6;
  --amber: #f2ad4e;
  --red: #ef5a6f;
  --blue: #5b8def;
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", monospace;
  --sans: "IBM Plex Sans", system-ui, -apple-system, sans-serif;
  --wrap: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 44px 44px;
  background-attachment: fixed;
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 28px;
}

h1, h2, h3 {
  font-family: var(--mono);
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 0.5em;
  color: #fff;
}
h1 { font-size: clamp(2.4rem, 5vw, 3.6rem); line-height: 1.05; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); line-height: 1.15; }
h3 { font-size: 1.05rem; }
p { margin: 0 0 1em; color: var(--text); }
a { color: var(--blue); }

.eyebrow {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--teal);
  margin: 0 0 0.9em;
}

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--teal); color: #06251d; padding: 10px 16px;
  font-family: var(--mono); z-index: 200;
}
.skip-link:focus { left: 16px; top: 16px; }

a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 3px;
}

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(10, 15, 22, 0.86);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.header-row {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.brand-mark { color: var(--teal); font-size: 1.3rem; }
.brand-name { font-family: var(--mono); font-weight: 600; color: #fff; font-size: 1.05rem; }
.site-nav { display: flex; align-items: center; gap: 28px; }
.site-nav a { color: var(--text-dim); text-decoration: none; font-size: 0.94rem; }
.site-nav a:hover { color: var(--text); }
.nav-cta {
  font-family: var(--mono); color: var(--teal) !important;
  border: 1px solid var(--teal); border-radius: 6px; padding: 8px 14px;
}
.nav-cta:hover { background: rgba(53, 209, 166, 0.1); }

.nav-toggle {
  display: none; flex-direction: column; justify-content: center; gap: 5px;
  width: 40px; height: 40px; background: none; border: 1px solid var(--line);
  border-radius: 6px; cursor: pointer;
}
.nav-toggle span { display: block; height: 2px; background: var(--text); margin: 0 8px; }
.mobile-nav {
  display: none; flex-direction: column; gap: 2px;
  background: var(--panel); border-bottom: 1px solid var(--line);
  padding: 8px 28px 16px;
}
.mobile-nav a {
  color: var(--text-dim); text-decoration: none; padding: 12px 0;
  border-bottom: 1px solid var(--line); font-size: 0.98rem;
}
.mobile-nav a:last-child { border-bottom: none; }
.mobile-nav.open { display: flex; }

@media (max-width: 860px) {
  .site-nav { display: none; }
  .nav-toggle { display: flex; }
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--mono); font-size: 0.92rem; font-weight: 500;
  padding: 13px 22px; border-radius: 7px; text-decoration: none;
  border: 1px solid transparent; cursor: pointer; transition: transform 0.12s ease;
}
.btn-primary { background: var(--teal); color: #06251d; }
.btn-primary:hover { transform: translateY(-1px); }
.btn-ghost { border-color: var(--line); color: var(--text); }
.btn-ghost:hover { border-color: var(--text-dim); }
.btn-block { width: 100%; }

/* ---------- hero ---------- */
.hero { padding: 84px 0 100px; }
.hero-grid {
  display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 56px; align-items: center;
}
.hero-sub { color: var(--text-dim); font-size: 1.06rem; max-width: 46ch; }
.hero-actions { display: flex; gap: 14px; margin-top: 8px; flex-wrap: wrap; }

.hero-visual { position: relative; }
.graph { width: 100%; height: auto; display: block; }
.noise-nodes circle { fill: var(--text-dim); opacity: 0.55; }
.noise-lines line {
  stroke: var(--teal); stroke-width: 1.4; opacity: 0;
  stroke-dasharray: 220; stroke-dashoffset: 220;
}
.incident-node { fill: var(--teal); opacity: 0; transform-origin: 330px 230px; }

@media (prefers-reduced-motion: no-preference) {
  .noise-lines line {
    animation: draw 1.4s ease forwards;
    animation-delay: 0.6s;
  }
  .noise-lines line:nth-child(2) { animation-delay: 1s; }
  .noise-lines line:nth-child(3) { animation-delay: 1.4s; }
  .incident-node {
    animation: pop 0.6s ease forwards, pulse 2.2s ease-in-out 2.6s infinite;
    animation-delay: 2s;
  }
  .evidence-card {
    animation: cardIn 0.6s ease forwards;
    animation-delay: 2.3s;
  }
}
@keyframes draw { to { stroke-dashoffset: 0; opacity: 0.85; } }
@keyframes pop { from { opacity: 0; transform: scale(0.3); } to { opacity: 1; transform: scale(1); } }
@keyframes pulse {
  0%, 100% { filter: drop-shadow(0 0 0 rgba(53,209,166,0)); }
  50% { filter: drop-shadow(0 0 10px rgba(53,209,166,0.7)); }
}
@keyframes cardIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

@media (prefers-reduced-motion: reduce) {
  .noise-lines line { opacity: 0.85; stroke-dashoffset: 0; }
  .incident-node { opacity: 1; }
  .evidence-card { opacity: 1; }
}

.evidence-card {
  position: absolute; right: 4%; bottom: 6%;
  width: min(280px, 78%);
  background: var(--panel); border: 1px solid var(--line); border-radius: 10px;
  padding: 16px 18px; opacity: 0;
  box-shadow: 0 20px 40px rgba(0,0,0,0.35);
}
.evidence-title { font-family: var(--mono); font-size: 0.86rem; color: #fff; margin: 0 0 8px; }
.evidence-list { list-style: none; margin: 0 0 12px; padding: 0; }
.evidence-list li {
  font-size: 0.82rem; color: var(--text-dim); padding-left: 14px; position: relative; margin-bottom: 4px;
}
.evidence-list li::before { content: "\2013"; position: absolute; left: 0; color: var(--teal); }
.evidence-tags { display: flex; gap: 6px; flex-wrap: wrap; }
.tag {
  font-family: var(--mono); font-size: 0.72rem; padding: 3px 9px; border-radius: 999px;
  border: 1px solid var(--line);
}
.tag-critical { color: var(--red); border-color: rgba(239,90,111,0.4); }
.tag-confidence { color: var(--teal); border-color: rgba(53,209,166,0.4); }

@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero { padding: 56px 0 64px; }
}

/* ---------- sectors ---------- */
.sectors { padding: 90px 0; border-top: 1px solid var(--line); background: var(--panel); }
.sectors h2 { max-width: 20ch; }
.sectors-lede { color: var(--text-dim); max-width: 62ch; font-size: 1.02rem; }
.sectors-tags { margin: 24px 0 44px; }
.sectors-tags li { border-color: rgba(53,209,166,0.35); color: var(--teal); }
.sector-points { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.sector-point { background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: 22px; }
.sector-point h3 { font-size: 1rem; margin-bottom: 0.5em; }
.sector-point p { color: var(--text-dim); font-size: 0.92rem; margin: 0; }

@media (max-width: 860px) {
  .sector-points { grid-template-columns: 1fr; }
}

/* ---------- philosophy ---------- */
.philosophy { padding: 90px 0; border-top: 1px solid var(--line); }
.philosophy h2 { max-width: 20ch; margin-bottom: 0.9em; }
.assertions { list-style: none; margin: 32px 0 0; padding: 0; max-width: 640px; }
.assertions li {
  font-family: var(--mono); font-size: 1.08rem; color: var(--text);
  padding: 14px 0; border-bottom: 1px solid var(--line);
}
.assertion-mark { color: var(--teal); margin-right: 12px; }

/* ---------- engines ---------- */
.engines { padding: 90px 0; border-top: 1px solid var(--line); }
.engines h2 { max-width: 26ch; }
.engine-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 40px;
}
.engine-card {
  background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 24px;
}
.engine-num { font-family: var(--mono); color: var(--text-dim); font-size: 0.85rem; margin-bottom: 12px; }
.engine-card h3 { margin-bottom: 0.5em; }
.engine-card p { color: var(--text-dim); font-size: 0.94rem; margin: 0; }
.engine-card:nth-child(4), .engine-card:nth-child(5) { grid-column: span 1; }

@media (max-width: 860px) {
  .engine-grid { grid-template-columns: 1fr; }
}
@media (min-width: 861px) and (max-width: 1080px) {
  .engine-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ---------- principles ---------- */
.principles { padding: 90px 0; border-top: 1px solid var(--line); background: var(--panel); }
.principles-grid { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: 48px; }
.principles h2 { max-width: 18ch; }
.principle-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.principle h3 { color: var(--teal); font-size: 0.98rem; }
.principle p { color: var(--text-dim); font-size: 0.94rem; margin: 0; }

@media (max-width: 860px) {
  .principles-grid { grid-template-columns: 1fr; }
  .principle-list { grid-template-columns: 1fr; }
}

/* ---------- fit ---------- */
.fit { padding: 90px 0; border-top: 1px solid var(--line); }
.fit h2 { max-width: 20ch; }
.fit-columns { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; margin-top: 36px; }
.fit-col h3 { color: var(--text-dim); font-size: 0.85rem; letter-spacing: 0.06em; text-transform: uppercase; font-family: var(--mono); font-weight: 500; }
.tag-cloud { list-style: none; margin: 16px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 10px; }
.tag-cloud li {
  font-family: var(--mono); font-size: 0.85rem; color: var(--text);
  background: var(--panel-2); border: 1px solid var(--line); border-radius: 999px;
  padding: 7px 14px;
}

@media (max-width: 700px) {
  .fit-columns { grid-template-columns: 1fr; }
}

/* ---------- CTA / contact ---------- */
.cta-band { padding: 90px 0 110px; border-top: 1px solid var(--line); }
.cta-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: start; }
.cta-copy h2 { max-width: 16ch; }
.cta-copy p { color: var(--text-dim); max-width: 40ch; }
.cta-alt { font-size: 0.92rem; }
.cta-alt a { color: var(--teal); }

.contact-form {
  background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 28px;
  display: flex; flex-direction: column; gap: 16px;
}
.contact-form label {
  display: flex; flex-direction: column; gap: 7px;
  font-size: 0.86rem; color: var(--text-dim); font-family: var(--mono);
}
.contact-form input, .contact-form textarea {
  background: var(--bg); border: 1px solid var(--line); border-radius: 7px;
  padding: 11px 13px; color: var(--text); font-family: var(--sans); font-size: 0.96rem;
  resize: vertical;
}
.contact-form input:focus, .contact-form textarea:focus { border-color: var(--teal); }
.form-note { font-size: 0.86rem; color: var(--teal); min-height: 1.2em; margin: 0; }
.form-note.is-error { color: var(--red); }

@media (max-width: 860px) {
  .cta-grid { grid-template-columns: 1fr; }
}

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--line); padding: 40px 0; }
.footer-row { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
.footer-tagline, .footer-copy { color: var(--text-dim); font-size: 0.86rem; margin: 0; }