/* ============================================================
   Spark Automations — Public Site
   Brand: monochrome geometric. No gradients in body content.
   No drop shadows. 1px borders, 8–10px radius, Inter only.
   ============================================================ */

:root {
  /* Core palette — locked to BRAND.md §2 */
  --ink: #0A0A0A;
  --paper: #FFFFFF;
  --off-paper: #FAFAFA;
  --gray-900: #171717;
  --gray-700: #404040;
  --gray-500: #737373;
  --gray-300: #D4D4D4;
  --gray-200: #E5E5E5;
  --gray-100: #F5F5F5;

  /* Functional accents — muted, signal only */
  --warn: #B45309;
  --ok:   #15803D;
  --info: #1E40AF;
  --stop: #991B1B;

  /* System */
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --mono: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  --radius: 10px;
  --radius-sm: 8px;
  --border: 1px solid var(--gray-300);
  --container: 1200px;
  --pad: 32px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: 'cv11', 'ss01', 'ss03';
  text-rendering: optimizeLegibility;
}

@supports (font-variation-settings: normal) {
  html, body { font-family: 'Inter var', var(--sans); }
}

img, svg { display: block; max-width: 100%; }

a {
  color: inherit;
  text-decoration: none;
  transition: opacity 160ms var(--ease), color 160ms var(--ease);
}
a:hover { opacity: 0.7; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--pad);
  width: 100%;
}

.mono {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--gray-500);
}

.kicker {
  display: inline-block;
  padding: 6px 10px;
  border: var(--border);
  border-radius: var(--radius-sm);
  color: var(--gray-700);
  text-transform: uppercase;
  margin-bottom: 18px;
}

.dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--gray-500);
  vertical-align: middle;
  margin: 0 6px;
}
.dot-ok   { background: var(--ok); }
.dot-warn { background: var(--warn); }
.dot-info { background: var(--info); }
.dot-stop { background: var(--stop); }

.sep { color: var(--gray-300); margin: 0 4px; }

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0;
  border: 1px solid var(--ink);
  cursor: pointer;
  transition: transform 160ms var(--ease), background 160ms var(--ease), color 160ms var(--ease), opacity 160ms var(--ease);
  font-family: inherit;
}
.btn-primary { background: var(--ink); color: var(--paper); }
.btn-primary:hover { background: var(--gray-900); opacity: 1; transform: translateY(-1px); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--gray-300); }
.btn-ghost:hover { border-color: var(--ink); opacity: 1; }

/* ============================================================
   Sticky nav
   ============================================================ */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,0.7);
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid transparent;
  transition: background 200ms var(--ease), border-color 200ms var(--ease);
}
.nav.scrolled {
  background: rgba(255,255,255,0.92);
  border-bottom-color: var(--gray-200);
}
.nav-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 14px var(--pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.nav-logo { height: 48px; width: auto; display: block; }
.nav-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
}
.nav-mark { display: inline-flex; color: var(--ink); }
.nav-wordmark {
  display: inline-flex;
  flex-direction: column;
  line-height: 1;
}
.nav-wordmark-1 {
  font-weight: 800;
  font-size: 20px;
  letter-spacing: 0.18em;
}
.nav-wordmark-2 {
  font-weight: 500;
  font-size: 12px;
  letter-spacing: 0.32em;
  color: var(--gray-700);
  margin-top: 3px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 14px;
  color: var(--gray-700);
}
.nav-links a:hover { color: var(--ink); opacity: 1; }
.nav-cta {
  padding: 8px 14px;
  border: 1px solid var(--ink);
  border-radius: var(--radius-sm);
  color: var(--ink);
  font-weight: 600;
}
.nav-cta:hover { background: var(--ink); color: var(--paper); opacity: 1; }

/* ============================================================
   Hero
   ============================================================ */
.hero {
  position: relative;
  padding: 100px var(--pad) 80px;
  max-width: var(--container);
  margin: 0 auto;
  overflow: hidden;
}
/* GCT-context hero background.
   Three.js icosahedral lattice + dodecahedron + quasicrystal cloud.
   Layered text-fade ensures legibility on the left/center where the
   hero copy sits. Pure monochrome ink-on-paper, no color. */
.hero > .hero-grid,
.hero > .hero-meta { position: relative; z-index: 2; }
.hero-bg-3d {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}
.hero-bg-3d canvas {
  display: block;
  width: 100% !important;
  height: 100% !important;
}
/* Text-readability fade — strong ink-fade in the upper-left where
   the eyebrow/heading/sub/cta sit; lets geometry breathe on the right. */
.hero-bg-fade {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  background:
    linear-gradient(105deg,
      rgba(255,255,255,0.96) 0%,
      rgba(255,255,255,0.88) 28%,
      rgba(255,255,255,0.55) 50%,
      rgba(255,255,255,0.10) 75%,
      rgba(255,255,255,0)    100%);
}
/* Fallback / pre-load — same SVG aligned grid behaviour stays usable
   on the comparison page; in production it's replaced by the 3D scene. */
.hero-bg-aligned {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
  mask-image: radial-gradient(ellipse 70% 55% at center, rgba(0,0,0,1) 40%, rgba(0,0,0,0.15) 100%);
  -webkit-mask-image: radial-gradient(ellipse 70% 55% at center, rgba(0,0,0,1) 40%, rgba(0,0,0,0.15) 100%);
}
.hero-bg-aligned svg { width: 100%; height: 100%; display: block; }
.hero-bg-aligned .grid-line { stroke: var(--ink); stroke-width: 0.5; opacity: 0.06; }
.hero-bg-aligned .tok {
  fill: var(--ink);
  transform-box: fill-box;
  transform-origin: center;
  animation: tok-align 14s var(--ease) infinite;
  will-change: transform, opacity;
}
@keyframes tok-align {
  0%   { transform: translate(var(--dx), var(--dy)) rotate(var(--dr)); opacity: 0.30; }
  42%  { transform: translate(calc(var(--dx) * 0.35), calc(var(--dy) * 0.35)) rotate(calc(var(--dr) * 0.35)); opacity: 0.55; }
  50%  { transform: translate(0, 0) rotate(0); opacity: 0.85; }
  58%  { transform: translate(calc(var(--dx) * 0.35), calc(var(--dy) * 0.35)) rotate(calc(var(--dr) * 0.35)); opacity: 0.55; }
  100% { transform: translate(var(--dx), var(--dy)) rotate(var(--dr)); opacity: 0.30; }
}
@media (prefers-reduced-motion: reduce) {
  .hero-bg-aligned .tok { animation: none; opacity: 0.45; transform: none; }
}
.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 12px;
  border: var(--border);
  border-radius: 999px;
  width: max-content;
  background: var(--paper);
}
.hero-heading {
  font-size: clamp(40px, 7vw, 88px);
  line-height: 0.98;
  letter-spacing: -0.025em;
  font-weight: 800;
  margin: 18px 0 0;
  color: var(--ink);
  max-width: 16ch;
}
.hero-heading .line {
  display: block;
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 700ms var(--ease), transform 700ms var(--ease);
}
.hero-heading .line.in { opacity: 1; transform: none; }
.hero-heading .line-muted { color: var(--gray-500); }

.hero-sub {
  margin-top: 28px;
  font-size: clamp(16px, 1.4vw, 19px);
  line-height: 1.55;
  color: var(--gray-700);
  max-width: 62ch;
}
.hero-cta-row {
  margin-top: 34px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.hero-meta {
  margin-top: 60px;
  padding-top: 24px;
  border-top: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

/* ============================================================
   Marquee
   ============================================================ */
.marquee {
  border-top: 1px solid var(--gray-200);
  border-bottom: 1px solid var(--gray-200);
  background: var(--paper);
  overflow: hidden;
  padding: 22px 0;
}
.marquee-track {
  display: inline-flex;
  align-items: center;
  gap: 36px;
  white-space: nowrap;
  animation: marquee 36s linear infinite;
  font-weight: 700;
  font-size: clamp(24px, 3vw, 38px);
  letter-spacing: -0.01em;
  color: var(--ink);
}
.marquee-track .diamond {
  color: var(--gray-300);
  font-weight: 400;
  font-size: 0.7em;
}
@keyframes marquee {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* ============================================================
   Section ornament divider — ink-on-paper drafting strip
   ============================================================ */
.ornament {
  height: 80px;
  background-image: url('/assets/divider-2.jpg');
  background-size: contain;
  background-position: center;
  background-repeat: no-repeat;
  background-color: var(--paper);
  opacity: 0.55;
  filter: grayscale(100%);
}
.ornament-on-alt { background-color: var(--off-paper); }
@media (max-width: 700px) {
  .ornament { height: 56px; opacity: 0.45; }
}

/* ============================================================
   Sections
   ============================================================ */
.section {
  padding: 100px 0;
}
.section-alt {
  background: var(--off-paper);
  border-top: 1px solid var(--gray-200);
  border-bottom: 1px solid var(--gray-200);
}
.section-head {
  max-width: 60ch;
  margin-bottom: 56px;
}
.section-head h2 {
  margin: 0;
  font-size: clamp(28px, 3.4vw, 44px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--ink);
}
.section-lede {
  margin-top: 14px;
  font-size: 17px;
  color: var(--gray-700);
  line-height: 1.55;
}

/* ============================================================
   Bento
   ============================================================ */
.bento {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 24px;
}
.bento-card {
  grid-column: span 3;
  background: var(--paper);
  border: var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: transform 220ms var(--ease), border-color 220ms var(--ease);
}
.bento-card.bento-lg { grid-column: span 6; }
.bento-card:hover {
  transform: translateY(-2px) scale(1.005);
  border-color: var(--ink);
}
@media (min-width: 900px) {
  .bento-card { grid-column: span 2; }
  .bento-card.bento-lg { grid-column: span 3; }
}
.bento-icon {
  width: 44px;
  height: 44px;
  border: var(--border);
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--ink);
  margin-bottom: 18px;
  background: var(--paper);
}
.bento-card h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.005em;
}
.bento-card p {
  margin: 0;
  color: var(--gray-700);
  font-size: 14.5px;
  line-height: 1.55;
}
.bento-tags {
  list-style: none;
  padding: 0;
  margin: 16px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.bento-tags li {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--gray-700);
  padding: 4px 8px;
  border: 1px solid var(--gray-200);
  border-radius: 6px;
  background: var(--off-paper);
}

/* ============================================================
   Counters
   ============================================================ */
.counters {
  margin-top: 64px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  border-top: 1px solid var(--gray-200);
  padding-top: 40px;
}
@media (min-width: 800px) {
  .counters { grid-template-columns: repeat(4, 1fr); }
}
.counter-num {
  font-size: clamp(36px, 4vw, 56px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}
.counter-label {
  margin-top: 10px;
  text-transform: uppercase;
  color: var(--gray-500);
}

/* ============================================================
   Principles
   ============================================================ */
.principles {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
@media (min-width: 800px) {
  .principles { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1100px) {
  .principles { grid-template-columns: repeat(4, 1fr); }
}
.principle {
  background: var(--paper);
  border: var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color 200ms var(--ease), transform 200ms var(--ease);
}
.principle:hover { border-color: var(--ink); transform: translateY(-2px); }
.principle-num {
  display: inline-block;
  padding: 4px 8px;
  background: var(--ink);
  color: var(--paper);
  border-radius: 4px;
  font-size: 11px;
  margin-bottom: 16px;
}
.principle h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
}
.principle p {
  margin: 0;
  color: var(--gray-700);
  font-size: 14.5px;
}

/* Method strip */
.method {
  margin-top: 56px;
  background: var(--paper);
  border: var(--border);
  border-radius: var(--radius);
  padding: 32px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}
@media (min-width: 900px) {
  .method {
    grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
    align-items: start;
  }
}
.method-step h4 {
  margin: 8px 0 4px;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}
.method-step p {
  margin: 0;
  font-size: 13.5px;
  color: var(--gray-700);
}
.method-num {
  text-transform: uppercase;
  color: var(--gray-500);
}
.method-arrow {
  color: var(--gray-300);
  font-size: 20px;
  align-self: center;
  text-align: center;
}

/* ============================================================
   Selected work
   ============================================================ */
#work { position: relative; overflow: hidden; }
#work::before {
  content: "";
  position: absolute;
  right: -8%;
  top: 40px;
  width: 55%;
  height: 320px;
  background-image: url('/assets/divider-1.jpg');
  background-size: contain;
  background-position: top right;
  background-repeat: no-repeat;
  opacity: 0.08;
  pointer-events: none;
  filter: grayscale(100%);
  z-index: 0;
}
#work .container { position: relative; z-index: 1; }
@media (max-width: 900px) {
  #work::before { display: none; }
}
.work-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
@media (min-width: 900px) {
  .work-grid { grid-template-columns: repeat(2, 1fr); }
}
.work-card {
  background: var(--paper);
  border: var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: border-color 200ms var(--ease), transform 200ms var(--ease);
}
.work-card:hover {
  border-color: var(--ink);
  transform: translateY(-2px);
}
.work-meta {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  text-transform: uppercase;
  margin-bottom: 18px;
  font-size: 11px;
}
.work-card h3 {
  margin: 0 0 12px;
  font-size: 22px;
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
  max-width: 30ch;
}
.work-card p {
  margin: 0;
  color: var(--gray-700);
  font-size: 15px;
  line-height: 1.55;
}
.work-tags {
  list-style: none;
  padding: 0;
  margin: 20px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.work-tags li {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--gray-700);
  padding: 4px 8px;
  border: 1px solid var(--gray-200);
  border-radius: 6px;
  background: var(--off-paper);
}

/* ============================================================
   Contact
   ============================================================ */
.section-contact {
  background: var(--ink);
  color: var(--paper);
  border-top: 1px solid var(--ink);
}
.section-contact .kicker {
  background: transparent;
  border-color: rgba(255,255,255,0.2);
  color: rgba(255,255,255,0.7);
}
.section-contact h2 { color: var(--paper); }
.section-contact .section-lede { color: rgba(255,255,255,0.7); }
.section-contact .mono { color: rgba(255,255,255,0.5); }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
}
@media (min-width: 900px) {
  .contact-grid { grid-template-columns: 1fr 1fr; gap: 64px; }
}

.contact-list {
  list-style: none;
  padding: 0;
  margin: 32px 0 0;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.contact-list li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-bottom: 18px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.contact-list a { color: var(--paper); font-size: 17px; font-weight: 500; }
.contact-list a:hover { opacity: 0.7; }
.contact-label {
  text-transform: uppercase;
  font-size: 11px;
  letter-spacing: 0.08em;
}
.contact-note { margin-top: 4px; font-size: 11px; }
.contact-fineprint {
  margin-top: 28px;
  font-size: 12px;
  color: rgba(255,255,255,0.45);
  max-width: 38ch;
}

/* Form */
.contact-form {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.form-row { display: flex; flex-direction: column; gap: 6px; }
.form-row label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,0.6);
  font-weight: 500;
}
.optional { text-transform: none; letter-spacing: 0; color: rgba(255,255,255,0.4); }
.form-row input,
.form-row textarea {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius-sm);
  color: var(--paper);
  padding: 12px 14px;
  font-family: inherit;
  font-size: 15px;
  line-height: 1.5;
  transition: border-color 160ms var(--ease), background 160ms var(--ease);
  resize: vertical;
}
.form-row input:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--paper);
  background: rgba(255,255,255,0.06);
}
.honey { position: absolute; left: -10000px; top: -10000px; height: 0; width: 0; overflow: hidden; }
.form-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 4px;
}
.form-actions .btn-primary {
  background: var(--paper);
  color: var(--ink);
  border-color: var(--paper);
}
.form-actions .btn-primary:hover { background: var(--gray-100); }
.form-actions .btn-primary:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }
.form-status { font-size: 12px; }
.form-status.ok { color: #4ade80; }
.form-status.err { color: #fca5a5; }

/* ============================================================
   Footer
   ============================================================ */
.footer {
  background: var(--paper);
  border-top: 1px solid var(--gray-200);
  padding: 56px 0;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: center;
}
@media (min-width: 900px) {
  .footer-inner {
    grid-template-columns: auto 1fr auto auto;
    gap: 32px;
  }
}
.footer-brand { display: inline-flex; align-items: center; gap: 10px; }
.footer-mark { color: var(--ink); display: inline-flex; }
.footer-wordmark { display: inline-flex; flex-direction: column; line-height: 1; }
.footer-wordmark-1 { font-weight: 800; font-size: 13px; letter-spacing: 0.18em; }
.footer-wordmark-2 { font-weight: 500; font-size: 8.5px; letter-spacing: 0.32em; color: var(--gray-700); margin-top: 2px; }
.footer-tagline { font-size: 12px; color: var(--gray-500); }
.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-links a { font-size: 13px; color: var(--gray-700); }
.footer-meta { display: inline-flex; gap: 8px; align-items: center; font-size: 11px; }

/* ============================================================
   Floating CTA
   ============================================================ */
.float-cta {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 40;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 18px;
  background: var(--paper);
  border: 1px solid var(--ink);
  border-radius: 999px;
  color: var(--ink);
  font-size: 13px;
  font-weight: 600;
  transition: transform 180ms var(--ease), background 180ms var(--ease), color 180ms var(--ease);
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
}
.float-cta.visible {
  opacity: 1;
  pointer-events: auto;
  transform: none;
}
.float-cta:hover { background: var(--ink); color: var(--paper); opacity: 1; transform: translateY(-2px); }
.float-cta-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--ok);
  display: inline-block;
}

/* ============================================================
   Scroll-fade utility
   ============================================================ */
[data-fade] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 700ms var(--ease), transform 700ms var(--ease);
}
[data-fade].in { opacity: 1; transform: none; }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 900px) {
  :root { --pad: 22px; }
  .nav-links { gap: 12px; font-size: 13px; }
  .nav-links a:not(.nav-cta) { display: none; }
  .hero { padding: 70px var(--pad) 60px; }
  .section { padding: 70px 0; }
  .section-head { margin-bottom: 36px; }
  .marquee-track { font-size: 22px; gap: 24px; }
  .float-cta { right: 14px; bottom: 14px; padding: 10px 14px; font-size: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  [data-fade] { opacity: 1; transform: none; }
  .hero-heading .line { opacity: 1; transform: none; }
}