:root {
  --pi-accent: #7c3aed;
  --pi-accent-2: #22d3ee;
  --pi-bg-soft: rgba(255, 255, 255, 0.06);
  --pi-border: rgba(255, 255, 255, 0.12);
}

.talk-timer {
  position: fixed;
  left: 0;
  bottom: 0;
  width: 4px;
  height: 100vh;
  background: rgba(255, 255, 255, 0.08);
  z-index: 40;
  pointer-events: none;
}

.talk-timer-fill {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 0;
  background: linear-gradient(180deg, #67e8f9, var(--pi-accent));
  box-shadow: 0 0 12px rgba(34, 211, 238, 0.45);
  transition: background 180ms ease, box-shadow 180ms ease;
}

.talk-timer.warning .talk-timer-fill {
  background: linear-gradient(180deg, #fbbf24, #f97316);
  box-shadow: 0 0 12px rgba(251, 191, 36, 0.45);
}

.talk-timer.overtime .talk-timer-fill {
  background: linear-gradient(180deg, #fb7185, #ef4444);
  box-shadow: 0 0 12px rgba(239, 68, 68, 0.45);
}

.reveal {
  font-size: 2.125rem;
}

.reveal h1,
.reveal h2,
.reveal h3 {
  text-transform: none;
  letter-spacing: -0.03em;
}

.reveal h1 {
  font-size: 2.5em;
}

.reveal h2 {
  font-size: 1.6em;
  margin-bottom: 0.5em;
}

.reveal p,
.reveal li {
  line-height: 1.35;
}

.reveal code {
  color: #a5f3fc;
}

.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
}

.hero-slide {
  position: relative;
}

.hero-slide .hero {
  gap: 0.28rem;
}

.logo {
  width: 120px;
  height: 120px;
  margin-bottom: 0.5rem;
  filter: drop-shadow(0 8px 24px rgba(124, 58, 237, 0.35));
}

.inline-pi-mark {
  display: block;
  height: 0.75em;
  width: auto;
  filter: drop-shadow(0 2px 8px rgba(124, 58, 237, 0.35));
}

.hero-links {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  line-height: 1;
}

.hero-links span {
  display: block;
  margin: 0;
  padding: 0;
  line-height: 1;
}

.hero-links-separator {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-block: -0.125em;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.22em;
  font-size: 0.45em;
  color: #c4b5fd;
  margin: 0;
}

.subtitle {
  max-width: 22ch;
}

.small {
  font-size: 0.55em;
}

.muted {
  opacity: 0.72;
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  align-items: start;
}

.two-col.tighter {
  gap: 0.8rem;
}

.grid-2x2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.card {
  padding: 1rem;
  border-radius: 20px;
  background: var(--pi-bg-soft);
  border: 1px solid var(--pi-border);
  text-align: left;
}

.slide-two-layout {
  grid-template-columns: 0.9fr 1.1fr;
  gap: 1rem;
  align-items: center;
}

.diagram-card {
  background: #ffffff;
  border-radius: 20px;
  padding: 0.75rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.25);
}

.diagram-card img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 12px;
}

.card h3 {
  margin-top: 0;
  margin-bottom: 0.3rem;
  color: #ddd6fe;
}

.modes-slide {
  width: 100%;
}

.modes-slide h2 {
  margin-bottom: 0.25em;
}

.modes-slide > p {
  margin: 0 0 0.6rem;
}

.modes-slide .grid-2x2 {
  gap: 0.75rem;
}

.modes-slide .card {
  padding: 0.7rem 0.8rem;
}

.modes-slide .card h3 {
  font-size: 0.82em;
  margin-bottom: 0.2rem;
}

.modes-slide .card p {
  font-size: 0.72em;
  margin: 0.3rem 0 0;
  line-height: 1.25;
}

.modes-slide .small {
  font-size: 0.48em;
}

.label {
  font-size: 0.6em;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #c4b5fd;
}

.session-alias-slide {
  width: 100%;
}

.session-alias-slide h2 {
  margin-bottom: 0.25em;
}

.session-alias-layout {
  align-items: center;
}

.session-alias-slide p {
  margin: 0 0 0.5rem;
}

.session-alias-slide pre {
  margin: 0;
}

.session-alias-slide pre code {
  font-size: 0.66em;
  line-height: 1.3;
  max-height: none;
}

.session-alias-slide .card {
  padding: 0.8rem 0.9rem;
}

.session-alias-slide .card h3 {
  font-size: 0.84em;
}

.session-alias-slide .card ul {
  font-size: 0.72em;
  margin: 0.35rem 0 0;
}

.session-alias-slide .card li + li {
  margin-top: 0.25rem;
}

.session-footnote {
  display: block;
  margin: 0.45rem 0 0 !important;
  font-size: 0.42em !important;
  line-height: 1.1;
  text-align: left;
  opacity: 0.78;
}

.hero-qr-card {
  position: absolute;
  top: 0.2rem;
  right: 0.2rem;
  width: 140px;
  text-align: center;
}

.hero-qr-card img {
  display: block;
  width: 100%;
  height: auto;
  margin: 0 auto 0.25rem;
  padding: 0.35rem;
  background: #fff;
  border-radius: 14px;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.24);
}

.hero-qr-card p {
  margin: 0;
  max-width: 100%;
  line-height: 1.05;
}

.hero-qr-card code {
  font-size: 0.72em;
}

.presets-slide h2,
.model-prompt-slide h2,
.scope-slide h2,
.auth-slide h2,
.mindset-slide h2,
.ladder-slide h2,
.packages-slide h2,
.compare-slide h2,
.links-slide h2 {
  margin-bottom: 0.25em;
}

.presets-slide > p,
.scope-slide > p,
.auth-slide > p {
  margin: 0 0 0.55rem;
}

.presets-slide .two-col,
.scope-slide .two-col,
.mindset-slide .two-col,
.packages-slide .two-col,
.compare-slide .two-col,
.model-prompt-layout {
  align-items: stretch;
}

.presets-slide .card,
.scope-slide .card,
.auth-slide .card,
.mindset-slide .card,
.ladder-slide .card,
.packages-slide .card,
.model-prompt-slide .card,
.compare-slide .card {
  padding: 0.8rem 0.9rem;
}

.presets-slide .card h3,
.scope-slide .card h3,
.auth-slide .card h3,
.mindset-slide .card h3,
.ladder-slide .card h3,
.packages-slide .card h3,
.model-prompt-slide .card h3,
.compare-slide .card h3 {
  font-size: 0.84em;
  margin-bottom: 0.2rem;
}

.presets-slide .card ul,
.scope-slide .card ul,
.auth-slide .card ul,
.mindset-slide .card ul,
.ladder-slide .card ul,
.model-prompt-slide .card ul,
.compare-slide .card ul {
  font-size: 0.72em;
  margin: 0.35rem 0 0;
}

.presets-slide .card p,
.scope-slide .card p,
.auth-slide .card p,
.mindset-slide .card p,
.ladder-slide .card p,
.packages-slide .card p,
.model-prompt-slide .card p,
.compare-slide .card p {
  font-size: 0.72em;
  margin: 0.35rem 0 0;
  line-height: 1.25;
}

.presets-slide .card li + li,
.scope-slide .card li + li,
.auth-slide .card li + li,
.mindset-slide .card li + li,
.ladder-slide .card li + li,
.model-prompt-slide .card li + li,
.compare-slide .card li + li {
  margin-top: 0.25rem;
}

.model-prompt-slide pre,
.packages-slide pre {
  margin: 0;
}

.model-prompt-slide pre code {
  font-size: 0.58em;
  line-height: 1.25;
  max-height: none;
}

.packages-slide pre code {
  font-size: 0.66em;
  line-height: 1.3;
  max-height: none;
}

.auth-grid {
  gap: 0.7rem;
}

.auth-slide .card {
  padding: 0.7rem 0.8rem;
}

.auth-slide .card h3 {
  font-size: 0.8em;
}

.auth-slide .card p {
  font-size: 0.68em;
}

.auth-note {
  margin-top: 0.55rem;
}

.ladder-slide .grid-2x2 {
  gap: 0.75rem;
}

.ladder-slide .card {
  padding: 0.7rem 0.8rem;
}

.packages-layout,
.links-layout {
  align-items: center;
}

.links-heading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
}

.links-heading h2 {
  margin: 0;
}

.links-logo {
  width: 54px;
  height: 54px;
  filter: drop-shadow(0 4px 14px rgba(124, 58, 237, 0.35));
}

.links-slide ul {
  font-size: 0.75em;
}

.links-slide li code {
  font-size: 0.9em;
}

.qr-card {
  text-align: center;
}

.qr-card img {
  display: block;
  width: 220px;
  max-width: 100%;
  height: auto;
  margin: 0 auto 0.5rem;
  padding: 0.6rem;
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.28);
}

.qr-card p {
  margin: 0;
  word-break: break-word;
}

.reveal pre {
  width: 100%;
  box-shadow: none;
  border: 1px solid var(--pi-border);
  border-radius: 16px;
  overflow: hidden;
}

.reveal pre code {
  max-height: 420px;
  padding: 1rem 1.2rem;
}

.reveal a {
  color: #67e8f9;
}

@media (max-width: 900px) {
  .two-col,
  .grid-2x2 {
    grid-template-columns: 1fr;
  }
}