:root {
  --ink: #071018;
  --ink-2: #0d1b26;
  --paper: #e8eef2;
  --fog: #c5d0d8;
  --mist: #8a9ba8;
  --copper: #e07a3a;
  --copper-bright: #ff9a4d;
  --datum: #b8f23a;
  --font-display: "Syne", sans-serif;
  --font-body: "Figtree", sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; background: var(--ink); color: var(--paper); font-family: var(--font-body); }
.deck {
  height: 100%;
  overflow: hidden;
  position: relative;
  background:
    radial-gradient(ellipse 70% 50% at 80% 0%, rgba(224,122,58,.2), transparent 55%),
    radial-gradient(ellipse 50% 40% at 0% 100%, rgba(184,242,58,.08), transparent 50%),
    var(--ink);
}
.slide {
  position: absolute;
  inset: 0;
  padding: clamp(2rem, 5vw, 4rem);
  display: none;
  flex-direction: column;
  justify-content: center;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .45s var(--ease), transform .45s var(--ease);
}
.slide.active {
  display: flex;
  opacity: 1;
  transform: none;
}
.slide .eyebrow {
  font-size: .8rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--datum);
  font-weight: 700;
  margin: 0 0 1rem;
}
.slide h1 {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  letter-spacing: -.04em;
  line-height: 1.05;
  margin: 0 0 1rem;
  max-width: 14ch;
}
.slide h1 em { font-style: normal; color: var(--copper-bright); }
.slide h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  letter-spacing: -.03em;
  line-height: 1.1;
  margin: 0 0 1rem;
  max-width: 18ch;
}
.slide p { color: var(--fog); font-size: clamp(1.05rem, 2vw, 1.25rem); max-width: 36ch; margin: 0; }
.slide ul {
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: .65rem;
  max-width: 40rem;
}
.slide li {
  color: var(--fog);
  font-size: 1.1rem;
  padding-left: 1.2rem;
  position: relative;
}
.slide li::before {
  content: "";
  position: absolute;
  left: 0; top: .55em;
  width: .55rem; height: .55rem;
  border-radius: 50%;
  background: var(--copper);
}
.brand-line {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 5vw, 3.2rem);
  letter-spacing: -.03em;
}
.brand-line em { font-style: normal; color: var(--copper-bright); }
.grid-3 {
  display: grid;
  gap: 1.25rem;
  margin-top: 1.5rem;
}
@media (min-width: 800px) { .grid-3 { grid-template-columns: repeat(3, 1fr); } }
.grid-3 div {
  border-top: 1px solid rgba(197,208,216,.18);
  padding-top: .85rem;
}
.grid-3 strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.25rem;
  margin-bottom: .35rem;
}
.grid-3 span { color: var(--mist); font-size: .95rem; }
.controls {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  display: flex;
  gap: .5rem;
  z-index: 5;
  align-items: center;
}
.controls button {
  border: 1px solid rgba(197,208,216,.25);
  background: rgba(13,27,38,.85);
  color: var(--paper);
  border-radius: 999px;
  padding: .55rem 1rem;
  font: inherit;
  cursor: pointer;
}
.controls button:hover { border-color: var(--copper); color: var(--copper-bright); }
.progress {
  position: fixed;
  left: 0; right: 0; top: 0;
  height: 3px;
  background: rgba(197,208,216,.12);
  z-index: 6;
}
.progress > i {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--copper), var(--datum));
  transition: width .35s var(--ease);
}
.slide-num {
  color: var(--mist);
  font-size: .85rem;
  margin-right: .5rem;
}
.home-link {
  position: fixed;
  left: 1.25rem;
  bottom: 1.25rem;
  z-index: 5;
  color: var(--mist);
  font-size: .9rem;
  text-decoration: none;
}
.home-link:hover { color: var(--paper); }
.flow {
  display: flex; flex-wrap: wrap; gap: .4rem; align-items: center;
  margin-top: 1.5rem; font-size: .95rem; color: var(--fog);
}
.flow b {
  background: var(--ink-2);
  border: 1px solid rgba(197,208,216,.16);
  padding: .4rem .7rem;
  border-radius: 8px;
  font-weight: 600;
  color: var(--paper);
}
.flow i { color: var(--copper); font-style: normal; }