/* =====================================================================
   GREY AI | Spark Score™ Survey landing page
   Styles
   ===================================================================== */

:root {
  /* Ink + paper */
  --ink:        #0a0a0b;
  --ink-soft:   #4a4d52;
  --ink-faint:  #84878d;
  --paper:      #ffffff;
  --paper-2:    #f7f9fa;

  /* Cyan "spark" scale (from the reference dots) */
  --spark:        #2fd6c3;
  --spark-bright: #5ee6d0;
  --spark-deep:   #11a596;
  --spark-pale:   #bff5ec;
  --spark-mist:   #e6fbf6;

  --radius: 20px;
  --radius-lg: 28px;
  --shadow-sm: 0 1px 2px rgba(10,10,11,.05), 0 4px 14px rgba(10,10,11,.04);
  --shadow-md: 0 12px 40px rgba(10,30,28,.10), 0 2px 8px rgba(10,30,28,.05);
  --shadow-glow: 0 10px 36px rgba(47,214,195,.30);

  /* Avenir where available (Apple devices ship it); Montserrat is a geometric
     web fallback so other visitors get a close, consistent look. */
  --font-display: "Avenir Next", "Avenir", "Montserrat", system-ui, -apple-system, sans-serif;
  --font-body:    "Avenir Next", "Avenir", "Montserrat", system-ui, -apple-system, sans-serif;

  --maxw: 1240px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

a { color: inherit; }

/* ---------- Background atmosphere ---------- */
.bg-mesh {
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(46rem 36rem at 78% 18%, rgba(94,230,208,.20), transparent 60%),
    radial-gradient(34rem 30rem at 90% 60%, rgba(47,214,195,.14), transparent 62%),
    radial-gradient(40rem 38rem at 6% 92%, rgba(191,245,236,.30), transparent 60%),
    var(--paper);
}
/* fine grain overlay for texture */
.bg-grain {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: .35;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.4'/%3E%3C/svg%3E");
}

/* ---------- Layout shell ---------- */
.shell {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 3.5rem);
}

/* ---------- Top bar ---------- */
header.topbar {
  position: relative;
  z-index: 5;
  padding-top: clamp(1.1rem, 2.6vw, 1.9rem);
}
.topbar .shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.brand {
  /* The supplied logo SVG (1280x720) centers the actual mark in a band that
     is only ~35% of the canvas height, surrounded by whitespace. We crop that
     whitespace with an overflow-hidden window so the logo reads at full size. */
  display: block;
  position: relative;
  width: 206px;
  height: 44px;
  overflow: hidden;
  opacity: 0;
  animation: fadeDown .7s .05s cubic-bezier(.2,.7,.2,1) forwards;
}
.brand img {
  position: absolute;
  top: 50%;
  left: -18px;
  width: 206px;
  height: auto;
  transform: translateY(-50%);
  max-width: none;
  display: block;
  /* the logo SVG ships with a white background baked in; multiply blends it
     cleanly onto the page */
  mix-blend-mode: multiply;
}
.topbar .eyebrow {
  font-size: .82rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-faint);
  font-weight: 600;
  opacity: 0;
  animation: fadeDown .7s .15s cubic-bezier(.2,.7,.2,1) forwards;
}

/* ---------- Hero ---------- */
#hero {
  position: relative;
  min-height: calc(100svh - 92px);
  display: flex;
  align-items: center;
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  align-items: center;
  gap: clamp(1.5rem, 4vw, 4rem);
  width: 100%;
  padding-block: clamp(1.5rem, 5vw, 3rem) clamp(4rem, 8vw, 6rem);
}

.hero-copy { position: relative; z-index: 3; max-width: 34rem; }

.pill {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  padding: .42rem .85rem .42rem .6rem;
  border: 1px solid rgba(17,165,150,.22);
  background: rgba(255,255,255,.7);
  backdrop-filter: blur(8px);
  border-radius: 100px;
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .01em;
  color: var(--spark-deep);
  box-shadow: var(--shadow-sm);
  opacity: 0;
  animation: fadeUp .8s .2s cubic-bezier(.2,.7,.2,1) forwards;
}
.pill .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--spark);
  box-shadow: 0 0 0 4px rgba(47,214,195,.18);
}

h1.hero-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.4rem, 6.4vw, 4.35rem);
  line-height: .98;
  letter-spacing: -.02em;
  text-transform: uppercase;
  margin: 1.15rem 0 0;
  color: var(--ink);
}
h1.hero-title .line { display: block; overflow: hidden; }
h1.hero-title .line > span {
  display: block;
  transform: translateY(108%);
  animation: rise .9s cubic-bezier(.18,.8,.2,1) forwards;
}
h1.hero-title .line:nth-child(1) > span { animation-delay: .26s; }
h1.hero-title .line:nth-child(2) > span { animation-delay: .36s; }
h1.hero-title .line:nth-child(3) > span { animation-delay: .46s; }
h1.hero-title .spark-word { color: var(--spark-deep); position: relative; }
h1.hero-title sup {
  font-size: .34em;
  font-weight: 700;
  top: -1.4em;
  margin-left: .04em;
  color: var(--ink-faint);
}

.hero-sub {
  margin: 1.5rem 0 0;
  font-size: clamp(1.02rem, 1.5vw, 1.18rem);
  line-height: 1.62;
  color: var(--ink-soft);
  max-width: 40ch;
  opacity: 0;
  animation: fadeUp .85s .62s cubic-bezier(.2,.7,.2,1) forwards;
}
.hero-sub strong { color: var(--ink); font-weight: 600; }

.cta-row {
  margin-top: 2rem;
  display: flex;
  align-items: center;
  gap: 1.1rem;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeUp .85s .76s cubic-bezier(.2,.7,.2,1) forwards;
}

.btn-primary {
  --b: 0;
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  padding: 1.02rem 1.7rem;
  font-family: var(--font-body);
  font-size: 1.02rem;
  font-weight: 600;
  letter-spacing: .01em;
  color: var(--ink);
  text-decoration: none;
  background: rgba(255,255,255,.65);
  border: 1.5px solid var(--ink);
  border-radius: 100px;
  cursor: pointer;
  backdrop-filter: blur(6px);
  transition: transform .35s cubic-bezier(.2,.8,.2,1),
              box-shadow .35s ease, color .35s ease, border-color .35s ease, background .35s ease;
  overflow: hidden;
  isolation: isolate;
}
.btn-primary::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(120deg, var(--spark-bright), var(--spark));
  transform: translateY(102%);
  transition: transform .4s cubic-bezier(.2,.8,.2,1);
}
.btn-primary:hover,
.btn-primary:focus-visible {
  color: #04302b;
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
  outline: none;
}
.btn-primary:hover::before,
.btn-primary:focus-visible::before { transform: translateY(0); }
.btn-primary:focus-visible { outline: 3px solid rgba(47,214,195,.5); outline-offset: 3px; }
.btn-primary .arrow {
  transition: transform .35s cubic-bezier(.2,.8,.2,1);
}
.btn-primary:hover .arrow { transform: translateY(3px); }

.cta-note {
  font-size: .92rem;
  color: var(--ink-faint);
  display: inline-flex;
  align-items: center;
  gap: .45rem;
}
.cta-note svg { color: var(--spark-deep); }

/* ---------- Spark canvas ---------- */
.hero-visual {
  position: relative;
  z-index: 1;
  height: clamp(320px, 46vw, 560px);
}
#spark {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}
.hero-visual::after {
  /* soft halo behind the constellation */
  content: "";
  position: absolute;
  inset: 8% 8% 8% 8%;
  background: radial-gradient(circle at 55% 45%, rgba(94,230,208,.16), transparent 65%);
  filter: blur(6px);
  z-index: -1;
}

/* ---------- Scroll cue ---------- */
.scroll-cue {
  position: absolute;
  left: 50%;
  bottom: clamp(1rem, 3vh, 2rem);
  transform: translateX(-50%);
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: .5rem;
  font-size: .72rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--ink-faint);
  text-decoration: none;
  opacity: 0;
  animation: fadeUp 1s 1.2s ease forwards;
}
.scroll-cue .chev {
  width: 22px; height: 22px;
  animation: bob 1.8s ease-in-out infinite;
  color: var(--spark-deep);
}

/* ---------- Survey section ---------- */
#survey {
  position: relative;
  padding-block: clamp(3.5rem, 8vw, 7rem) clamp(4rem, 9vw, 8rem);
  background:
    linear-gradient(180deg, transparent, rgba(230,251,246,.6) 18%, rgba(230,251,246,.6) 100%);
}
.survey-head {
  text-align: center;
  max-width: 46ch;
  margin: 0 auto clamp(2rem, 4vw, 3rem);
}
.survey-head .kicker {
  display: inline-block;
  font-size: .82rem;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--spark-deep);
  margin-bottom: 1rem;
}
.survey-head h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.9rem, 4.4vw, 3rem);
  line-height: 1.04;
  letter-spacing: -.02em;
  margin: 0 0 .9rem;
}
.survey-head h2 em { font-style: normal; color: var(--spark-deep); }
.survey-head h2 sup {
  font-size: .38em;
  font-weight: 600;
  top: -1em;
  margin-left: .05em;
  color: var(--ink-faint);
}
.survey-head p {
  margin: 0;
  font-size: clamp(1rem, 1.4vw, 1.12rem);
  line-height: 1.6;
  color: var(--ink-soft);
}

.survey-card {
  position: relative;
  max-width: 920px;
  margin-inline: auto;
  background: var(--paper);
  border: 1px solid rgba(17,165,150,.16);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: clamp(.5rem, 1.4vw, 1rem);
  overflow: hidden;
}
/* gradient top accent on the card */
.survey-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--spark-bright), var(--spark), var(--spark-deep));
}
.tf-embed {
  width: 100%;
  min-height: 620px;
  border-radius: calc(var(--radius-lg) - 10px);
  overflow: hidden;
}
.tf-embed [data-tf-live] { min-height: 620px; }

/* ---------- Footer ---------- */
footer.site-foot {
  padding-block: 2.4rem 2.8rem;
  text-align: center;
  color: var(--ink-faint);
  font-size: .86rem;
}
footer.site-foot .tm { color: var(--ink-soft); font-weight: 600; }

/* ---------- Keyframes ---------- */
@keyframes rise   { to { transform: translateY(0); } }
@keyframes fadeUp { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeDown { from { opacity: 0; transform: translateY(-12px); } to { opacity: 1; transform: translateY(0); } }
@keyframes bob    { 0%,100% { transform: translateY(0); } 50% { transform: translateY(6px); } }

/* ---------- Responsive ---------- */
@media (max-width: 880px) {
  #hero { min-height: auto; }
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
    padding-block: 2rem 3.5rem;
  }
  .hero-copy { max-width: none; margin-inline: auto; }
  .hero-sub { margin-inline: auto; }
  .cta-row { justify-content: center; }
  .hero-visual {
    order: -1;
    height: clamp(240px, 60vw, 360px);
    width: 100%;
  }
  h1.hero-title { font-size: clamp(2.3rem, 11vw, 3.6rem); }
  .scroll-cue { display: none; }
}
@media (max-width: 520px) {
  .topbar .eyebrow { display: none; }
  .btn-primary { width: 100%; justify-content: center; }
  .cta-note { width: 100%; justify-content: center; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-delay: 0ms !important;
    transition-duration: .001ms !important;
  }
  h1.hero-title .line > span { transform: none; }
}