/* ==========================================================================
   SYNAPSE — AI Powered App landing page
   Tokens: bg #0A0C16 / bg-alt #10142A / violet #7C5CFF / cyan #00E5FF
           magenta #FF3EA5 / amber #FFB020 / text #F1F0FF / muted #8B8AA8
   Type: Space Grotesk (display) · Inter (body) · JetBrains Mono (utility)
   ========================================================================== */

* { margin: 0; padding: 0; box-sizing: border-box; }

:root{
  --bg: #0a0c16;
  --bg-alt: #10142a;
  --violet: #7c5cff;
  --cyan: #00e5ff;
  --magenta: #ff3ea5;
  --amber: #ffb020;
  --text: #f1f0ff;
  --muted: #8b8aa8;
  --card: rgba(255,255,255,0.045);
  --border: rgba(255,255,255,0.09);
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

@media (prefers-reduced-motion: reduce){
  *{ animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}

html{ scroll-behavior: smooth; }

/* keep section tops clear of the fixed nav when jumping via anchor links */
section[id], #top{ scroll-margin-top: 96px; }

body{
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  overflow-x: hidden;
  line-height: 1.5;
  position: relative;
}

a{ color: inherit; text-decoration: none; }
ul{ list-style: none; }
img{ max-width: 100%; display: block; }

::selection{ background: var(--violet); color: white; }

:focus-visible{
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- cursor glow ---------- */
.cursor-glow{
  position: fixed;
  width: 420px; height: 420px;
  border-radius: 50%;
  pointer-events: none;
  background: radial-gradient(circle, rgba(124,92,255,0.12), transparent 70%);
  transform: translate(-50%,-50%);
  z-index: 2;
  transition: opacity .3s ease;
  left: 50%; top: 50%;
}

/* ---------- ambient background ---------- */
.bg-blobs{ position: fixed; inset: 0; z-index: 0; overflow: hidden; }
.blob{
  position: absolute;
  width: 46vw; height: 46vw;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.35;
  animation: drift 22s ease-in-out infinite alternate;
}
.blob-violet{ background: var(--violet); top: -10%; left: -10%; }
.blob-cyan{ background: var(--cyan); bottom: -15%; right: -5%; animation-duration: 26s; opacity: 0.22; }
.blob-magenta{ background: var(--magenta); top: 30%; right: 20%; width: 30vw; height: 30vw; animation-duration: 18s; opacity: 0.18; }
@keyframes drift{
  from{ transform: translate(0,0) scale(1); }
  to{ transform: translate(4%, 6%) scale(1.12); }
}
.grid-overlay{
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(241,240,255,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(241,240,255,0.035) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 20%, black, transparent);
}

main, footer, header{ position: relative; z-index: 1; }

/* ---------- reveal on scroll ---------- */
.reveal{
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .8s cubic-bezier(.2,.7,.2,1), transform .8s cubic-bezier(.2,.7,.2,1);
}
.reveal.in{ opacity: 1; transform: translateY(0); }

/* ---------- utility ---------- */
.eyebrow{
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
  margin-bottom: 18px;
  text-transform: uppercase;
}
.dot-pulse{
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--magenta);
  box-shadow: 0 0 0 0 rgba(255,62,165,0.6);
  animation: pulse 1.8s infinite;
}
@keyframes pulse{
  0%{ box-shadow: 0 0 0 0 rgba(255,62,165,0.55); }
  70%{ box-shadow: 0 0 0 9px rgba(255,62,165,0); }
  100%{ box-shadow: 0 0 0 0 rgba(255,62,165,0); }
}

.grad-text{
  background: linear-gradient(100deg, var(--violet), var(--cyan) 60%, var(--magenta));
  background-size: 200% auto;
  -webkit-background-clip: text; background-clip: text; color: transparent;
  animation: shine 6s linear infinite;
}
.grad-text-2{
  background: linear-gradient(100deg, var(--amber), var(--magenta));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
@keyframes shine{
  to{ background-position: 200% center; }
}

.btn{
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 15px;
  padding: 13px 24px;
  border-radius: 999px;
  transition: transform .25s ease, box-shadow .25s ease, background .25s ease;
  cursor: pointer;
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn .arrow{ transition: transform .25s ease; }
.btn:hover .arrow{ transform: translateX(4px); }
.btn-primary{
  background: linear-gradient(100deg, var(--violet), var(--cyan));
  color: #05060c;
  box-shadow: 0 8px 30px -6px rgba(124,92,255,0.55);
}
.btn-primary:hover{ transform: translateY(-2px); box-shadow: 0 14px 34px -6px rgba(124,92,255,0.7); }
.btn-outline{
  border-color: var(--border);
  color: var(--text);
  background: rgba(255,255,255,0.02);
}
.btn-outline:hover{ border-color: var(--cyan); color: var(--cyan); transform: translateY(-2px); }
.btn-ghost{
  border: 1px solid var(--border);
  font-size: 14px;
  padding: 10px 20px;
}
.btn-ghost:hover{ border-color: var(--violet); }
.btn.large{ padding: 16px 30px; font-size: 16px; }

/* ---------- nav ---------- */
.nav{
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(10,12,22,0.55);
  border-bottom: 1px solid var(--border);
}
.nav-inner{
  max-width: 1200px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 32px;
}
.logo{
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-display); font-weight: 700; font-size: 19px; letter-spacing: -.01em;
}
.nav-links{ display: flex; gap: 32px; font-size: 14px; font-weight: 500; color: var(--muted); }
.nav-links a{ transition: color .2s ease; position: relative; }
.nav-links a:hover{ color: var(--text); }
.nav-burger{ display: none; background: none; border: none; flex-direction: column; gap: 5px; cursor: pointer; }
.nav-burger span{ width: 22px; height: 2px; background: var(--text); }

/* ---------- hero ---------- */
.hero{
  min-height: 100vh;
  display: flex; flex-direction: column; justify-content: center;
  padding: 140px 32px 60px;
  max-width: 1280px; margin: 0 auto;
}
.hero-inner{
  display: grid; grid-template-columns: 1.05fr 0.95fr;
  gap: 40px; align-items: center;
}
.hero-title{
  font-family: var(--font-display);
  font-size: clamp(38px, 5.4vw, 68px);
  line-height: 1.04;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 22px;
}
.hero-sub{
  color: var(--muted);
  font-size: 18px;
  max-width: 46ch;
  margin-bottom: 34px;
}
.hero-actions{ display: flex; gap: 14px; flex-wrap: wrap; }
.hero-actions.center{ justify-content: center; }
.hero-meta{
  margin-top: 40px;
  display: flex; align-items: center; gap: 14px;
  color: var(--muted); font-size: 14px;
}
.hero-meta strong{ color: var(--text); }
.avatars{ display: flex; }
.avatars img{
  width: 34px; height: 34px; border-radius: 50%;
  border: 2px solid var(--bg);
  margin-left: -10px;
  object-fit: cover;
}
.avatars img:first-child{ margin-left: 0; }

/* ---------- 3D orb ---------- */
.hero-visual{ position: relative; height: 480px; perspective: 1200px; }
.orb-scene{
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  transform-style: preserve-3d;
  animation: floatY 6s ease-in-out infinite;
}
@keyframes floatY{
  0%,100%{ transform: translateY(0); }
  50%{ transform: translateY(-16px); }
}
.orb-core{
  position: relative;
  width: 190px; height: 190px;
  transform-style: preserve-3d;
  animation: spin3d 16s linear infinite;
}
@keyframes spin3d{
  from{ transform: rotateX(-18deg) rotateY(0deg); }
  to{ transform: rotateX(-18deg) rotateY(360deg); }
}
.orb-face{
  position: absolute; inset: 0;
  border-radius: 50%;
  border: 1px solid rgba(124,92,255,0.5);
  background: radial-gradient(circle at 35% 30%, rgba(124,92,255,0.35), rgba(0,229,255,0.12) 55%, transparent 75%);
  box-shadow: inset 0 0 40px rgba(124,92,255,0.35);
}
.orb-face.front{ transform: translateZ(95px); }
.orb-face.back{ transform: translateZ(-95px) rotateY(180deg); }
.orb-face.left{ transform: rotateY(-90deg) translateZ(95px); }
.orb-face.right{ transform: rotateY(90deg) translateZ(95px); }
.orb-face.top{ transform: rotateX(90deg) translateZ(95px); }
.orb-face.bottom{ transform: rotateX(-90deg) translateZ(95px); }

.orb-ring{
  position: absolute; top: 50%; left: 50%;
  border: 1px solid rgba(0,229,255,0.35);
  border-radius: 50%;
  transform-style: preserve-3d;
}
.ring-1{ width: 300px; height: 300px; margin: -150px 0 0 -150px; transform: rotateX(72deg) rotateZ(0deg); animation: ringspin 12s linear infinite; }
.ring-2{ width: 360px; height: 360px; margin: -180px 0 0 -180px; border-color: rgba(255,62,165,0.3); transform: rotateX(72deg) rotateZ(60deg); animation: ringspin 18s linear infinite reverse; }
.ring-3{ width: 420px; height: 420px; margin: -210px 0 0 -210px; border-color: rgba(124,92,255,0.22); transform: rotateX(72deg) rotateZ(120deg); animation: ringspin 24s linear infinite; }
@keyframes ringspin{ to{ transform: rotateX(72deg) rotateZ(360deg); } }

.node{
  position: absolute;
  width: 10px; height: 10px; border-radius: 50%;
  box-shadow: 0 0 14px 3px currentColor;
  animation: nodeFloat 5s ease-in-out infinite;
}
.n1{ top: 14%; left: 18%; background: var(--cyan); color: var(--cyan); animation-delay: 0s; }
.n2{ top: 68%; left: 12%; background: var(--magenta); color: var(--magenta); animation-delay: .7s; }
.n3{ top: 20%; right: 14%; background: var(--amber); color: var(--amber); animation-delay: 1.4s; }
.n4{ bottom: 10%; right: 20%; background: var(--violet); color: var(--violet); animation-delay: 2.1s; }
@keyframes nodeFloat{
  0%,100%{ transform: translateY(0) scale(1); }
  50%{ transform: translateY(-14px) scale(1.25); }
}

.chat-float{
  position: absolute;
  background: rgba(16,20,42,0.85);
  border: 1px solid var(--border);
  backdrop-filter: blur(10px);
  padding: 12px 16px;
  border-radius: 14px;
  font-size: 13px;
  max-width: 220px;
  box-shadow: 0 12px 30px rgba(0,0,0,0.35);
  animation: floatCard 7s ease-in-out infinite;
}
.chat-tag{ display: block; font-family: var(--font-mono); font-size: 10px; color: var(--cyan); letter-spacing: .1em; margin-bottom: 4px; }
.chat-1{ top: 6%; right: -4%; animation-delay: 0s; }
.chat-2{ bottom: 8%; left: -6%; animation-delay: 1s; }
@keyframes floatCard{
  0%,100%{ transform: translateY(0); }
  50%{ transform: translateY(-10px); }
}

.scroll-cue{
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  margin: 40px auto 0; font-size: 11px; letter-spacing: .12em; color: var(--muted);
  font-family: var(--font-mono);
}
.scroll-cue span{
  width: 1px; height: 26px;
  background: linear-gradient(var(--cyan), transparent);
  animation: scrollDown 1.6s ease-in-out infinite;
}
@keyframes scrollDown{
  0%{ transform: scaleY(0); transform-origin: top; opacity: 0; }
  50%{ transform: scaleY(1); transform-origin: top; opacity: 1; }
  51%{ transform-origin: bottom; }
  100%{ transform: scaleY(0); transform-origin: bottom; opacity: 0; }
}

/* ---------- marquee ---------- */
.marquee-strip{ padding: 30px 32px; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.marquee-label{ text-align: center; font-family: var(--font-mono); font-size: 11px; letter-spacing: .16em; color: var(--muted); margin-bottom: 16px; }
.marquee{ overflow: hidden; }
.marquee-track{
  display: flex; gap: 60px; width: max-content;
  font-family: var(--font-display); font-weight: 600; font-size: 20px; color: var(--muted);
  animation: scrollX 26s linear infinite;
}
@keyframes scrollX{ to{ transform: translateX(-50%); } }

/* ---------- stats ---------- */
.stats{
  max-width: 1100px; margin: 0 auto;
  display: grid; grid-template-columns: repeat(4,1fr);
  gap: 24px; padding: 70px 32px;
  text-align: center;
}
.stat-num{ font-family: var(--font-display); font-size: clamp(30px,4vw,44px); font-weight: 700; color: var(--text); }
.stat-suffix{ font-family: var(--font-display); font-size: clamp(20px,3vw,28px); font-weight: 700; background: linear-gradient(100deg,var(--cyan),var(--violet)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat p{ color: var(--muted); font-size: 13px; margin-top: 6px; }

/* ---------- section head ---------- */
.section-head{ max-width: 640px; margin: 0 auto 56px; text-align: center; }
.section-head h2{
  font-family: var(--font-display); font-size: clamp(28px,3.6vw,42px);
  font-weight: 700; letter-spacing: -0.01em; line-height: 1.15; margin-bottom: 14px;
}
.section-head p{ color: var(--muted); font-size: 16px; }

/* ---------- features ---------- */
.features{ padding: 90px 32px; max-width: 1200px; margin: 0 auto; }
.feature-grid{
  display: grid; grid-template-columns: repeat(3,1fr); gap: 20px;
}
.f-card{
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 30px 26px;
  transition: transform .35s ease, border-color .35s ease, background .35s ease;
  transform-style: preserve-3d;
}
.f-card:hover{
  border-color: color-mix(in srgb, var(--accent) 50%, transparent);
  background: rgba(255,255,255,0.06);
}
.f-icon{
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 12px;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 16%, transparent);
  margin-bottom: 18px;
}
.f-icon svg{ width: 22px; height: 22px; }
.f-card h3{ font-family: var(--font-display); font-size: 19px; margin-bottom: 8px; }
.f-card p{ color: var(--muted); font-size: 14.5px; }

/* ---------- how it works ---------- */
.how{ padding: 90px 32px; max-width: 1100px; margin: 0 auto; }
.how-track{
  position: relative;
  display: grid; grid-template-columns: repeat(3,1fr); gap: 30px;
}
.how-line{
  position: absolute; top: 20px; left: 8%; right: 8%; height: 1px;
  background: linear-gradient(90deg, var(--violet), var(--cyan), var(--magenta));
  opacity: .5;
}
.how-step{ position: relative; padding-top: 54px; }
.how-num{
  position: absolute; top: 0; left: 0;
  font-family: var(--font-mono); font-size: 13px; color: var(--bg);
  background: linear-gradient(120deg, var(--cyan), var(--violet));
  width: 40px; height: 40px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; box-shadow: 0 0 20px rgba(0,229,255,0.35);
}
.how-step h3{ font-family: var(--font-display); font-size: 19px; margin-bottom: 8px; }
.how-step p{ color: var(--muted); font-size: 14.5px; }

/* ---------- demo ---------- */
.demo{
  max-width: 1180px; margin: 0 auto; padding: 90px 32px;
  display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 50px; align-items: center;
}
.demo-points{ margin-top: 18px; display: flex; flex-direction: column; gap: 10px; }
.demo-points li{ color: var(--muted); font-size: 14.5px; padding-left: 20px; position: relative; }
.demo-points li::before{ content: "✦"; position: absolute; left: 0; color: var(--cyan); }
.demo p{ color: var(--muted); font-size: 15.5px; margin-top: 10px; }
.demo-window{
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 18px;
  overflow: hidden;
  box-shadow: 0 30px 70px -20px rgba(0,0,0,0.6);
}
.demo-bar{
  display: flex; align-items: center; gap: 7px;
  padding: 14px 16px; border-bottom: 1px solid var(--border);
}
.demo-bar span{ width: 10px; height: 10px; border-radius: 50%; background: rgba(255,255,255,0.15); }
.demo-bar span:nth-child(1){ background: #ff5f57; }
.demo-bar span:nth-child(2){ background: #febc2e; }
.demo-bar span:nth-child(3){ background: #28c840; }
.demo-bar p{ margin: 0 0 0 10px; font-family: var(--font-mono); font-size: 12px; color: var(--muted); }
.demo-body{ padding: 26px; min-height: 220px; display: flex; flex-direction: column; gap: 14px; }
.msg{ max-width: 80%; padding: 12px 16px; border-radius: 14px; font-size: 14.5px; line-height: 1.5; }
.msg.user{ align-self: flex-end; background: linear-gradient(100deg, var(--violet), var(--cyan)); color: #05060c; font-weight: 500; border-bottom-right-radius: 4px; }
.msg.bot{ align-self: flex-start; background: rgba(255,255,255,0.05); border: 1px solid var(--border); border-bottom-left-radius: 4px; min-height: 20px; }
.typing-cursor::after{
  content: "";
  display: inline-block; width: 2px; height: 14px;
  background: var(--cyan); margin-left: 2px; vertical-align: middle;
  animation: blink 0.9s step-start infinite;
}
@keyframes blink{ 50%{ opacity: 0; } }

/* ---------- voices ---------- */
.voices{ padding: 90px 0 100px; }
.voices-track{ overflow: hidden; }
.voices-row{
  display: flex; gap: 22px; width: max-content;
  padding: 0 32px;
  animation: scrollX 34s linear infinite;
}
.v-card{
  width: 340px; flex-shrink: 0;
  background: var(--card); border: 1px solid var(--border);
  border-radius: 18px; padding: 26px;
}
.v-card p{ font-size: 15px; color: var(--text); margin-bottom: 20px; }
.v-person{ display: flex; align-items: center; gap: 12px; }
.v-person img{ width: 40px; height: 40px; border-radius: 50%; object-fit: cover; }
.v-person strong{ display: block; font-size: 13.5px; }
.v-person span{ font-size: 12.5px; color: var(--muted); }

/* ---------- cta ---------- */
.cta-band{
  margin: 0 32px 100px; padding: 80px 40px;
  border-radius: 32px; text-align: center;
  background: radial-gradient(120% 160% at 50% 0%, rgba(124,92,255,0.25), transparent 60%), var(--bg-alt);
  border: 1px solid var(--border);
  position: relative; overflow: hidden;
}
.cta-band::before{
  content: ""; position: absolute; inset: -2px;
  background: conic-gradient(from 0deg, var(--violet), var(--cyan), var(--magenta), var(--violet));
  opacity: 0.15; filter: blur(60px);
  animation: spinBg 14s linear infinite;
}
@keyframes spinBg{ to{ transform: rotate(360deg); } }
.cta-inner{ position: relative; z-index: 1; }
.cta-band h2{ font-family: var(--font-display); font-size: clamp(28px,4.2vw,46px); font-weight: 700; margin-bottom: 12px; }
.cta-band p{ color: var(--muted); margin-bottom: 30px; font-size: 16px; }

/* ---------- footer ---------- */
.footer{ border-top: 1px solid var(--border); padding: 40px 32px; }
.footer-inner{
  max-width: 1200px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px;
}
.logo-mark.small{ display: inline-flex; }
.footer p{ color: var(--muted); font-size: 13px; }
.footer-links{ display: flex; gap: 22px; font-size: 13.5px; color: var(--muted); }
.footer-links a:hover{ color: var(--cyan); }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 980px){
  .hero-inner{ grid-template-columns: 1fr; }
  .hero-visual{ height: 380px; order: -1; }
  .demo{ grid-template-columns: 1fr; }
  .feature-grid{ grid-template-columns: repeat(2,1fr); }
  .how-track{ grid-template-columns: 1fr; }
  .how-line{ display: none; }
  .stats{ grid-template-columns: repeat(2,1fr); }
}

@media (max-width: 720px){
  .nav-links{ display: none; }
  .nav-burger{ display: flex; }
  .nav-cta{ display: none; }
  .hero{ padding-top: 110px; }
  .feature-grid{ grid-template-columns: 1fr; }
  .cta-band{ margin: 0 16px 70px; padding: 60px 24px; }
  .hero-actions{ flex-direction: column; align-items: stretch; }
  .hero-actions .btn{ justify-content: center; }
  .cursor-glow{ display: none; }
}