/* ============================================================
   FORESHOCK — design system
   Instrument panel meets editorial. Dark-mode primary.
   Accent: signal blue, plus a cyan trace for live signal graphs.
   Type: Space Grotesk + IBM Plex Mono.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root {
  /* ---- surfaces (near-black, cool charcoal) ---- */
  --bg: #0a0d10;
  --bg-2: #0c1014;
  --surface: #10151a;
  --surface-2: #151c22;
  --surface-3: #1a232a;

  /* ---- lines ---- */
  --border: rgba(233, 240, 244, 0.08);
  --border-strong: rgba(233, 240, 244, 0.16);
  --grid: rgba(233, 240, 244, 0.035);

  /* ---- text ---- */
  --text: #e9eef1;
  --muted: #97a3aa;
  --dim: #5d6970;
  --faint: #3c454b;

  /* ---- accent: signal blue (nav + content highlight, unified) ---- */
  --accent: #1aa3e8;
  --accent-hi: #5abdee;
  --accent-deep: #0f5f87;
  --accent-ink: #f2f8ff; /* text on accent fills */
  --accent-glow: rgba(26, 163, 232, 0.16);
  --accent-rgb: 26, 163, 232;

  /* ---- trace: seismograph signal color — lighter shade of highlight,
     kept independent so the live-signal graphs read distinctly ---- */
  --trace: #19d0e3;

  /* ---- type ---- */
  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-body: 'Space Grotesk', system-ui, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, 'SF Mono', monospace;

  /* ---- geometry ---- */
  --r-sm: 4px;
  --r-md: 6px;
  --r-lg: 10px;
  --maxw: 1200px;
  --gutter: clamp(20px, 5vw, 64px);

  /* ---- motion ---- */
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ============================================================ reset */
*,
*::before,
*::after {
  box-sizing: border-box;
}
* {
  margin: 0;
}
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}
a {
  color: inherit;
  text-decoration: none;
}
img,
svg,
canvas {
  display: block;
  max-width: 100%;
}
button {
  font: inherit;
  color: inherit;
  cursor: pointer;
  background: none;
  border: none;
}
::selection {
  background: var(--accent);
  color: var(--accent-ink);
}

/* faint instrument grid behind everything */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 64px 64px;
  pointer-events: none;
  z-index: 0;
  mask-image: radial-gradient(ellipse 120% 90% at 50% 0%, #000 30%, transparent
    90%);
}

/* ============================================================ layout */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
  position: relative;
  z-index: 1;
}
.section {
  padding-block: clamp(72px, 11vw, 140px);
  position: relative;
}
.section--tight {
  padding-block: clamp(48px, 7vw, 88px);
}
.divider {
  height: 1px;
  background: var(--border);
  border: 0;
}

/* ============================================================ type */
.display {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 0.98;
  letter-spacing: -0.03em;
  font-size: clamp(2.6rem, 7vw, 5.4rem);
  text-wrap: balance;
}
.h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2.1rem, 4.6vw, 3.4rem);
  line-height: 1.04;
  letter-spacing: -0.025em;
  text-wrap: balance;
}
.h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.7rem, 3.4vw, 2.5rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  text-wrap: balance;
}
.h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.2rem, 2vw, 1.5rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
}
.lead {
  font-size: clamp(1.05rem, 1.6vw, 1.3rem);
  color: var(--muted);
  line-height: 1.5;
  text-wrap: pretty;
}
p {
  text-wrap: pretty;
}
.prose-muted {
  color: var(--muted);
}

/* mono instrument label */
.label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--dim);
}
.label--accent {
  color: var(--accent);
}
.mono {
  font-family: var(--font-mono);
}

/* eyebrow: index + label, e.g. "01 / SAMPLE" */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}
.eyebrow .idx {
  color: var(--accent);
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--accent);
  display: inline-block;
}

/* ============================================================ buttons */
.btn {
  --pad-y: 0.72em;
  --pad-x: 1.25em;
  display: inline-flex;
  align-items: center;
  gap: 0.55em;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  padding: var(--pad-y) var(--pad-x);
  border-radius: var(--r-sm);
  border: 1px solid transparent;
  transition: background .18s var(--ease), border-color .18s var(--ease),
    color .18s var(--ease), transform .12s var(--ease), box-shadow .18s
    var(--ease);
  white-space: nowrap;
  line-height: 1;
}
.btn:active {
  transform: translateY(1px);
}
.btn--primary {
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 600;
}
.btn--primary:hover {
  background: var(--accent-hi);
  box-shadow: 0 0 0 1px var(--accent-hi), 0 8px 30px -10px var(--accent-glow);
}
.btn--ghost {
  border-color: var(--border-strong);
  color: var(--text);
  background: transparent;
}
.btn--ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.btn--link {
  padding: 0;
  color: var(--muted);
  border-radius: 0;
}
.btn--link:hover {
  color: var(--accent);
}
.btn--lg {
  --pad-y: 0.95em;
  --pad-x: 1.6em;
  font-size: 0.9rem;
}
.btn--sm {
  --pad-y: 0.5em;
  --pad-x: 0.9em;
  font-size: 0.74rem;
}
.btn .arrow {
  transition: transform .18s var(--ease);
}
.btn:hover .arrow {
  transform: translateX(3px);
}

/* ============================================================ badges / chips */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 0.4em 0.7em;
  border: 1px solid var(--border-strong);
  border-radius: 100px;
}
.badge--accent {
  color: var(--accent);
  border-color: rgba(var(--accent-rgb), 0.4);
}
.badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}
.badge--accent .dot {
  box-shadow: 0 0 8px var(--accent);
  animation: pulse-dot 2.6s var(--ease) infinite;
}
@keyframes pulse-dot {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.35;
  }
}
@media (prefers-reduced-motion: reduce) {
  .badge--accent .dot {
    animation: none;
  }
}
/* "trust cyan" — reserved for purely-semantic / no-LLM-classification claims */
.badge--trust {
  color: var(--trace);
  border-color: rgba(25, 208, 227, 0.5);
  background: rgba(25, 208, 227, 0.12);
}
.badge--trust .meta-cue {
  color: inherit;
}

/* ============================================================ cards */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: clamp(22px, 3vw, 34px);
  position: relative;
  transition: border-color .2s var(--ease), background .2s var(--ease),
    transform .2s var(--ease);
}
.card--hover:hover {
  border-color: var(--border-strong);
  transform: translateY(-3px);
}
.card__num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  letter-spacing: 0.1em;
}

/* corner ticks — instrument framing */
.ticked {
  position: relative;
}
.ticked::before,
.ticked::after {
  content: "";
  position: absolute;
  width: 8px;
  height: 8px;
  border-color: var(--border-strong);
  border-style: solid;
  border-width: 0;
}
.ticked::before {
  top: -1px;
  left: -1px;
  border-top-width: 1px;
  border-left-width: 1px;
  border-top-color: var(--accent);
  border-left-color: var(--accent);
}
.ticked::after {
  bottom: -1px;
  right: -1px;
  border-bottom-width: 1px;
  border-right-width: 1px;
}

/* ============================================================ nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: blur(14px) saturate(1.2);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
}
.nav__inner {
  display: flex;
  align-items: center;
  gap: 28px;
  height: 64px;
}
.nav__links {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-left: auto;
}
.nav__link {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.03em;
  color: var(--muted);
  transition: color .16s var(--ease);
  position: relative;
}
.nav__link:hover {
  color: var(--text);
}
.nav__link.is-active {
  color: var(--text);
}
.nav__sep {
  width: 1px;
  height: 20px;
  background: var(--border);
}
.nav__burger {
  display: none;
}

@media (max-width: 860px) {
  .nav__links {
    display: none;
  }
  .nav__burger {
    display: inline-flex;
    margin-left: auto;
  }
  .nav__links.is-open {
    display: flex;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding: 16px var(--gutter) 24px;
    background: var(--bg-2);
    border-bottom: 1px solid var(--border);
  }
  .nav__links.is-open .nav__sep {
    display: none;
  }
  .nav__links.is-open .nav__link {
    padding: 8px 0;
    font-size: 0.95rem;
  }
}

/* Client dashboard bottom sign-out: redundant once the top nav shows one
   (nav links appear above 860px), so hide it there and keep it where the
   nav collapses. */
@media (min-width: 861px) {
  .signout-bottom {
    display: none;
  }
}

/* ============================================================ footer */
.footer {
  border-top: 1px solid var(--border);
  background: var(--bg-2);
  position: relative;
  z-index: 1;
}
.footer__grid {
  display: grid;
  grid-template-columns: 1.6fr repeat(4, 1fr);
  gap: 40px 32px;
  padding-block: clamp(48px, 7vw, 80px);
}
.footer__col h4 {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--dim);
  margin-bottom: 16px;
  font-weight: 500;
}
.footer__col a {
  display: block;
  color: var(--muted);
  font-size: 0.92rem;
  padding: 5px 0;
  transition: color .16s var(--ease);
}
.footer__col a:hover {
  color: var(--accent);
}
.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  padding-block: 24px;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--dim);
}
.footer__social {
  display: flex;
  gap: 14px;
}
.footer__social a {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  color: var(--muted);
  transition: all .16s var(--ease);
}
.footer__social a:hover {
  border-color: var(--accent);
  color: var(--accent);
}
@media (max-width: 860px) {
  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px 24px;
  }
  .footer__brand-col {
    grid-column: 1 / -1;
  }
}

/* ============================================================ logo */
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.02em;
  font-size: 1.18rem;
  color: var(--text);
}
.logo svg {
  overflow: visible;
}
.logo__trace {
  stroke: var(--accent);
}

/* ============================================================ get-started modal */
.modal-scrim {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--bg) 70%, #000);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: grid;
  place-items: center;
  padding: 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s var(--ease);
}
.modal-scrim.is-open {
  opacity: 1;
  pointer-events: auto;
}
.modal {
  width: min(480px, 100%);
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-lg);
  padding: clamp(28px, 4vw, 40px);
  transform: translateY(12px) scale(0.98);
  transition: transform .28s var(--ease);
  position: relative;
  overflow: hidden;
}
.modal-scrim.is-open .modal {
  transform: none;
}
.modal__close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  color: var(--dim);
  border-radius: var(--r-sm);
  transition: all .16s var(--ease);
}
.modal__close:hover {
  color: var(--text);
  background: var(--surface-2);
}
.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 8px;
}
.field label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--dim);
}
.input {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-sm);
  padding: 0.8em 0.9em;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  transition: border-color .16s var(--ease);
}
.input:focus {
  outline: none;
  border-color: var(--accent);
}
.input::placeholder {
  color: var(--faint);
}

/* ============================================================ misc utilities */
.stack > * + * {
  margin-top: var(--stack, 1rem);
}
.muted {
  color: var(--muted);
}
.dim {
  color: var(--dim);
}
.accent {
  color: var(--accent);
}
.center {
  text-align: center;
}
.hairline-top {
  border-top: 1px solid var(--border);
}
.fade-mask-r {
  mask-image: linear-gradient(90deg, #000 70%, transparent);
}

/* reveal-on-scroll */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
.reveal.is-in {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}