:root {
  --bg: #0F172A;
  --bg-card: #161F32;
  --bg-card-alt: #1E293B;
  --border: #243046;
  --border-alt: #334155;
  --text: #F8FAFC;
  --text-dim: #CBD5E1;
  --text-dimmer: #94A3B8;
  --pink: #E879F9;
  --magenta: #C026D3;
  --blue: #0EA5E9;
  --blue-light: #38BDF8;
  --green: #86EFAC;
  --yellow: #FDE68A;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  background-image: radial-gradient(circle at 1.5px 1.5px, #1E293B 1.5px, transparent 0);
  background-size: 28px 28px;
  color: var(--text-dim);
  font-family: 'Segoe UI', -apple-system, Helvetica, Arial, sans-serif;
  line-height: 1.6;
}

a { color: inherit; }

.wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 700;
  font-size: 22px;
  color: var(--text);
}

.logo svg { display: block; }

nav { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; justify-content: flex-end; }

@media (max-width: 760px) {
  header { flex-direction: column; align-items: flex-start; gap: 16px; }
  nav { width: 100%; justify-content: flex-start; }
}

nav a.navlink {
  text-decoration: none;
  color: var(--text-dim);
  font-size: 14px;
  font-weight: 600;
  padding: 8px 14px;
}

nav a.navlink:hover { color: var(--text); }

nav a.navlink.current { color: var(--text); border-bottom: 2px solid var(--pink); }

nav a.btn-github {
  text-decoration: none;
  color: var(--text-dim);
  font-size: 14px;
  font-weight: 600;
  padding: 8px 16px;
  border: 1px solid var(--border-alt);
  border-radius: 17px;
  transition: border-color .15s, color .15s;
}

nav a.btn-github:hover { border-color: var(--pink); color: var(--text); }

.icon-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 8px;
  border: 1px solid var(--border-alt);
  color: var(--text-dim);
  transition: border-color .15s, color .15s;
}

.icon-link:hover { border-color: var(--blue-light); color: var(--text); }
.icon-link svg { width: 16px; height: 16px; display: block; }

.hero { padding: 56px 0 24px; text-align: center; }

.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--blue-light);
  background: rgba(14, 165, 233, .1);
  border: 1px solid rgba(14, 165, 233, .3);
  border-radius: 17px;
  padding: 6px 14px;
  margin-bottom: 20px;
}

h1 {
  font-size: 44px;
  line-height: 1.15;
  color: var(--text);
  margin: 0 0 20px;
  font-weight: 700;
}

h1 span {
  background: linear-gradient(135deg, var(--pink), var(--blue));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lede { max-width: 680px; margin: 0 auto 32px; font-size: 17px; color: var(--text-dim); }

.cta-row { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-bottom: 48px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
  transition: transform .15s, opacity .15s;
}

.btn:hover { transform: translateY(-1px); }

.btn-primary { background: linear-gradient(135deg, var(--pink), var(--blue)); color: #0B0F1A; }

.btn-secondary { background: var(--bg-card-alt); border: 1px solid var(--border-alt); color: var(--text); }

.hero-image { max-width: 900px; margin: 0 auto 72px; }

.hero-image svg { width: 100%; height: auto; display: block; border-radius: 14px; border: 1px solid var(--border); background: #111827; }

@media (max-width: 760px) {
  /* The diagram's internal text is sized in SVG viewBox units, so shrinking it to the full
     container width makes the labels unreadably small. Keep it at a fixed legible size and let
     it scroll horizontally instead. */
  .hero-image { overflow-x: auto; -webkit-overflow-scrolling: touch; margin-left: -24px; margin-right: -24px; padding: 0 24px; max-width: none; }
  .hero-image svg { width: 760px; flex-shrink: 0; }
}

section.block { padding: 56px 0; border-top: 1px solid var(--border); }

.page-head { padding: 56px 0 24px; text-align: center; }

.page-head h1 { font-size: 36px; }

.section-head { text-align: center; max-width: 620px; margin: 0 auto 40px; }

.section-head h2 { color: var(--text); font-size: 30px; margin: 0 0 12px; }

.section-head p { color: var(--text-dimmer); margin: 0; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; }

.card {
  background: var(--bg-card-alt);
  border: 1px solid var(--border-alt);
  border-radius: 12px;
  padding: 22px;
  display: block;
  width: 100%;
  text-align: left;
  font-family: inherit;
  cursor: pointer;
  transition: border-color .15s, transform .15s;
}

.card:hover, .card:focus-visible {
  border-color: var(--blue-light);
  transform: translateY(-2px);
  outline: none;
}

.tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 17px;
  margin-bottom: 12px;
}

.tag-b2b { color: var(--pink); background: rgba(232, 121, 249, .12); border: 1px solid rgba(232, 121, 249, .3); }
.tag-b2c { color: var(--blue-light); background: rgba(56, 189, 248, .12); border: 1px solid rgba(56, 189, 248, .3); }
.tag-core { color: var(--green); background: rgba(134, 239, 172, .12); border: 1px solid rgba(134, 239, 172, .3); }

.card h3 { color: var(--text); font-size: 16px; margin: 0 0 8px; }
.card p { margin: 0; font-size: 14px; color: var(--text-dimmer); }

.why-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 24px; text-align: center; }

.why-row .num {
  font-size: 28px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--pink), var(--blue));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 6px;
}

.why-row h4 { color: var(--text); font-size: 15px; margin: 0 0 6px; }
.why-row p { font-size: 13px; color: var(--text-dimmer); margin: 0; }

.closing { text-align: center; padding: 64px 0; }
.closing h2 { color: var(--text); font-size: 30px; margin: 0 0 16px; }
.closing p { max-width: 560px; margin: 0 auto 28px; }

footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
  font-size: 13px;
  color: var(--text-dimmer);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

footer a { text-decoration: none; color: var(--text-dimmer); }
footer a:hover { color: var(--text); }
.footer-links { display: flex; gap: 20px; flex-wrap: wrap; }

/* Changelog */
.release {
  background: var(--bg-card-alt);
  border: 1px solid var(--border-alt);
  border-radius: 12px;
  padding: 24px 28px;
  margin-bottom: 18px;
}

.release-head { display: flex; align-items: baseline; gap: 14px; margin-bottom: 12px; flex-wrap: wrap; }
.release-head .version { color: var(--text); font-size: 19px; font-weight: 700; }
.release-head .date { color: var(--text-dimmer); font-size: 13px; }
.release ul { margin: 0; padding-left: 20px; }
.release li { margin-bottom: 6px; font-size: 14px; }
.release li::marker { color: var(--pink); }

/* Docs */
.docs-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 18px; margin-bottom: 40px; }
.doc-card { background: var(--bg-card-alt); border: 1px solid var(--border-alt); border-radius: 12px; padding: 24px; }
.doc-card h3 { color: var(--text); margin: 0 0 10px; font-size: 17px; }
.doc-card p { margin: 0 0 14px; font-size: 14px; color: var(--text-dimmer); }
.doc-card a.link { color: var(--blue-light); font-weight: 600; font-size: 14px; text-decoration: none; }
.doc-card a.link:hover { text-decoration: underline; }

.screens-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 24px; }
.screen-card { margin: 0; background: var(--bg-card-alt); border: 1px solid var(--border-alt); border-radius: 12px; overflow: hidden; }
.screen-card img { display: block; width: 100%; height: auto; border-bottom: 1px solid var(--border-alt); }
.screen-card figcaption { padding: 14px 18px; font-size: 13px; color: var(--text-dimmer); line-height: 1.5; }
.screen-card figcaption strong { color: var(--text-dim); }

.code-block {
  background: #0B1220;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px 20px;
  font-family: 'SF Mono', Menlo, Consolas, monospace;
  font-size: 13px;
  color: #93C5FD;
  overflow-x: auto;
  margin: 24px 0;
}

/* Contact form */
.form-card {
  max-width: 560px;
  margin: 0 auto;
  background: var(--bg-card-alt);
  border: 1px solid var(--border-alt);
  border-radius: 14px;
  padding: 32px;
}

.field { margin-bottom: 18px; text-align: left; }
.field label { display: block; font-size: 13px; font-weight: 600; color: var(--text-dim); margin-bottom: 6px; }

.field input, .field textarea {
  width: 100%;
  padding: 11px 14px;
  border-radius: 8px;
  border: 1px solid var(--border-alt);
  background: #0B1220;
  color: var(--text);
  font-family: inherit;
  font-size: 14px;
}

.field input:focus, .field textarea:focus {
  outline: none;
  border-color: var(--blue);
}

.field textarea { resize: vertical; min-height: 120px; }

.hp-field { position: absolute; left: -9999px; top: -9999px; }

.form-note { text-align: center; font-size: 13px; color: var(--text-dimmer); margin-top: 16px; }

.alert {
  max-width: 560px;
  margin: 0 auto 24px;
  padding: 14px 18px;
  border-radius: 10px;
  font-size: 14px;
  text-align: center;
}

.alert-success { background: rgba(134, 239, 172, .1); border: 1px solid rgba(134, 239, 172, .35); color: var(--green); }
.alert-error { background: rgba(248, 113, 113, .1); border: 1px solid rgba(248, 113, 113, .35); color: #FCA5A5; }

/* Feature detail modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(2, 6, 16, .7);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  z-index: 100;
}

.modal-overlay[hidden] { display: none; }

.modal-panel {
  position: relative;
  max-width: 640px;
  width: 100%;
  max-height: 88vh;
  overflow-y: auto;
  background: var(--bg-card-alt);
  border: 1px solid var(--border-alt);
  border-radius: 14px;
  padding: 32px;
}

.modal-screenshot {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 10px;
  border: 1px solid var(--border-alt);
  margin-bottom: 20px;
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  border: 1px solid var(--border-alt);
  background: transparent;
  color: var(--text-dimmer);
  font-size: 14px;
  cursor: pointer;
}

.modal-close:hover { color: var(--text); border-color: var(--blue-light); }

.modal-panel h3 { color: var(--text); font-size: 22px; margin: 14px 0 14px; }
.modal-panel p { color: var(--text-dim); font-size: 15px; margin: 0 0 20px; }
.modal-panel a.link { color: var(--blue-light); font-weight: 600; text-decoration: none; font-size: 14px; }
.modal-panel a.link:hover { text-decoration: underline; }

/* Flow animation */
.flow-svg .node-box { transition: none; }

.flow-group { animation: flowFade 9s infinite; }

@keyframes flowFade {
  0% { opacity: 0; }
  4% { opacity: 1; }
  95% { opacity: 1; }
  100% { opacity: 0; }
}

.pulse-trigger { animation: pulseTrigger 9s infinite; transform-origin: center; }
.pulse-condition { animation: pulseCondition 9s infinite; transform-origin: center; }
.pulse-action { animation: pulseAction 9s infinite; transform-origin: center; }

@keyframes pulseTrigger {
  0%, 2% { opacity: .55; filter: drop-shadow(0 0 0px transparent); }
  6%, 16% { opacity: 1; filter: drop-shadow(0 0 10px rgba(232, 121, 249, .55)); }
  22%, 100% { opacity: .55; filter: drop-shadow(0 0 0px transparent); }
}

@keyframes pulseCondition {
  0%, 30% { opacity: .55; filter: drop-shadow(0 0 0px transparent); }
  34%, 44% { opacity: 1; filter: drop-shadow(0 0 10px rgba(56, 189, 248, .55)); }
  50%, 100% { opacity: .55; filter: drop-shadow(0 0 0px transparent); }
}

@keyframes pulseAction {
  0%, 58% { opacity: .55; filter: drop-shadow(0 0 0px transparent); }
  62%, 74% { opacity: 1; filter: drop-shadow(0 0 10px rgba(232, 121, 249, .55)); }
  80%, 100% { opacity: .55; filter: drop-shadow(0 0 0px transparent); }
}

/* Traveling light — a small glowing dot runs along the static "wire" path between nodes,
   then parks at the destination at a dim resting glow instead of just vanishing. */
.travel-dot { filter: drop-shadow(0 0 5px rgba(255, 255, 255, .85)); }

.dot-1 { animation: dotOne 9s infinite; opacity: 0; }
.dot-2 { animation: dotTwo 9s infinite; opacity: 0; }

@keyframes dotOne {
  0%, 18% { opacity: 0; }
  20%, 34% { opacity: 1; }
  40%, 100% { opacity: .3; }
}

@keyframes dotTwo {
  0%, 46% { opacity: 0; }
  48%, 62% { opacity: 1; }
  68%, 100% { opacity: .3; }
}

.result-badge { animation: resultPop 9s infinite; opacity: 0; transform-origin: center; }

@keyframes resultPop {
  0%, 74% { opacity: 0; transform: scale(.8); }
  78%, 94% { opacity: 1; transform: scale(1); }
  100% { opacity: 0; transform: scale(.8); }
}

/* Little confetti burst radiating from the result badge when it pops */
.confetti-dot { opacity: 0; }
.c1 { animation: confetti1 9s infinite; }
.c2 { animation: confetti2 9s infinite; }
.c3 { animation: confetti3 9s infinite; }
.c4 { animation: confetti4 9s infinite; }

@keyframes confetti1 {
  0%, 76% { opacity: 0; transform: translate(0, 0) scale(.3); }
  80% { opacity: 1; transform: translate(-35px, -28px) scale(1); }
  94%, 100% { opacity: 0; transform: translate(-55px, -45px) scale(.6); }
}

@keyframes confetti2 {
  0%, 76% { opacity: 0; transform: translate(0, 0) scale(.3); }
  80% { opacity: 1; transform: translate(35px, -28px) scale(1); }
  94%, 100% { opacity: 0; transform: translate(55px, -45px) scale(.6); }
}

@keyframes confetti3 {
  0%, 76% { opacity: 0; transform: translate(0, 0) scale(.3); }
  80% { opacity: 1; transform: translate(-30px, 24px) scale(1); }
  94%, 100% { opacity: 0; transform: translate(-48px, 38px) scale(.6); }
}

@keyframes confetti4 {
  0%, 76% { opacity: 0; transform: translate(0, 0) scale(.3); }
  80% { opacity: 1; transform: translate(30px, 24px) scale(1); }
  94%, 100% { opacity: 0; transform: translate(48px, 38px) scale(.6); }
}

@media (prefers-reduced-motion: reduce) {
  .flow-group, .pulse-trigger, .pulse-condition, .pulse-action, .dot-1, .dot-2, .result-badge, .confetti-dot {
    animation: none !important;
    opacity: 1 !important;
  }
  .confetti-dot { opacity: 0 !important; }
}

@media (max-width: 900px) {
  h1 { font-size: 38px; }
  .section-head h2, .closing h2 { font-size: 26px; }
}

@media (max-width: 640px) {
  h1 { font-size: 30px; }
  .lede { font-size: 15px; }
  .hero { padding-top: 32px; }
  .page-head { padding-top: 32px; }
  .page-head h1 { font-size: 28px; }
  .section-head h2, .closing h2 { font-size: 22px; }
  section.block { padding: 40px 0; }
  .why-row { gap: 32px; }
  .modal-panel { padding: 24px; }
  footer { flex-direction: column; align-items: flex-start; }
  .release { padding: 18px 20px; }
}