:root {
  --background: #fbfaf7;
  --coral: #f45f63;
  --ink: #626c70;
  --muted: #8b9393;
  --line: #dfe1de;
}

* { box-sizing: border-box; }
html, body { min-height: 100%; }

body {
  margin: 0;
  overflow: hidden;
  background: var(--background);
  color: var(--ink);
  font-family: Inter, Helvetica, Arial, sans-serif;
}

button { font: inherit; }

.presentation {
  min-height: 100vh;
  display: grid;
  place-items: center;
  position: relative;
}

.slide-deck {
  width: min(100vw, calc(100vh * 16 / 9));
  height: min(100vh, calc(100vw * 9 / 16));
  position: relative;
}

.slide {
  position: absolute;
  inset: 0;
  padding: 7.5% 9.5% 7%;
  opacity: 0;
  pointer-events: none;
  visibility: hidden;
  transition: opacity 320ms ease, visibility 320ms ease;
}

.slide::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--line);
}

.slide.is-active {
  opacity: 1;
  pointer-events: auto;
  visibility: visible;
}

.slide-content { max-width: 91%; }
.title-content { padding-top: 3%; }

.eyebrow, .kicker {
  margin: 0 0 5.5%;
  color: var(--coral);
  font-size: clamp(0.6rem, 1.1vw, 0.82rem);
  font-weight: 700;
  letter-spacing: 0.16em;
  line-height: 1.2;
  text-transform: uppercase;
}

h1, h2 {
  margin: 0;
  color: var(--coral);
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 400;
  letter-spacing: -0.045em;
  line-height: 0.98;
}

h1 { font-size: clamp(3.2rem, 8.5vw, 8.2rem); }
h2 { font-size: clamp(2.2rem, 5.2vw, 5rem); }

.subtitle {
  max-width: 31rem;
  margin: 5.5% 0 0;
  color: var(--ink);
  font-size: clamp(1rem, 2vw, 1.65rem);
  line-height: 1.4;
}

.body-large, .example-copy p {
  margin: 0;
  font-size: clamp(1.05rem, 2vw, 1.7rem);
  line-height: 1.5;
}

.definition { max-width: 66rem; margin-top: 6.5%; }

.emphasis {
  max-width: 57rem;
  margin: 5% 0 0;
  color: var(--coral);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.25rem, 2.4vw, 2rem);
  line-height: 1.3;
}

.example-copy { max-width: 59rem; margin-top: 5.5%; }
.example-copy p + p { margin-top: 2.1%; }

.closing-line {
  max-width: 57rem;
  margin: 5.5% 0 0;
  color: var(--coral);
  font-size: clamp(1rem, 1.8vw, 1.45rem);
  font-weight: 700;
  line-height: 1.4;
}

.columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 9%;
  max-width: 71rem;
  margin-top: 5%;
}

h3 {
  margin: 0 0 6%;
  color: var(--ink);
  font-size: clamp(0.9rem, 1.6vw, 1.25rem);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

ul { margin: 0; padding: 0; list-style: none; }
li {
  position: relative;
  margin: 0 0 5%;
  padding-left: 1.1em;
  font-size: clamp(0.85rem, 1.45vw, 1.2rem);
  line-height: 1.38;
}

li::before { content: "—"; position: absolute; left: 0; color: var(--coral); }

.ethical-note {
  max-width: 64rem;
  margin: 3% 0 0;
  color: var(--muted);
  font-size: clamp(0.75rem, 1.2vw, 1rem);
  line-height: 1.45;
}

.discussion-content { max-width: 70rem; }
.discussion-question {
  max-width: 68rem;
  margin: 7% 0 0;
  color: var(--ink);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.45rem, 3.1vw, 2.75rem);
  line-height: 1.25;
}

.follow-up {
  max-width: 50rem;
  margin: 7% 0 0;
  font-size: clamp(1rem, 1.7vw, 1.4rem);
  line-height: 1.4;
}

.discussion-time {
  margin: 7% 0 0;
  color: var(--coral);
  font-size: clamp(0.75rem, 1.2vw, 1rem);
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.slide-number {
  position: absolute;
  right: 9.5%;
  bottom: 6.5%;
  margin: 0;
  color: var(--coral);
  font-size: clamp(0.65rem, 1vw, 0.8rem);
  font-weight: 700;
  letter-spacing: 0.08em;
}

.slide-number span { color: var(--muted); font-weight: 400; }

.controls {
  position: fixed;
  right: max(2.5vw, 1.5rem);
  bottom: max(2.5vw, 1.5rem);
  display: flex;
  align-items: center;
  gap: 1rem;
}

.control {
  width: 2.2rem;
  height: 2.2rem;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--coral);
  cursor: pointer;
  font-size: 1.35rem;
  line-height: 1;
}

.control:hover, .control:focus-visible { color: var(--ink); outline: none; }

.progress { display: flex; align-items: center; gap: 0.55rem; color: var(--muted); font-size: 0.7rem; letter-spacing: 0.1em; }
.progress-current { color: var(--coral); font-weight: 700; }
.progress-rule { width: 2rem; height: 1px; background: var(--line); }

@media (max-width: 700px) {
  body { overflow: auto; }
  .presentation { min-height: 100svh; padding: 1.5rem 0 4.5rem; }
  .slide-deck { width: 100vw; height: 56.25vw; min-height: 56.25vw; }
  .slide { padding: 8% 8% 8%; }
  .columns { gap: 5%; }
  .controls { bottom: 1rem; right: 1rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; }
}