:root {
  --eml-blue: #1769aa;
  --eml-navy: #15324b;
  --eml-cyan: #e9f5ff;
  --eml-gold: #d48b18;
  --eml-green: #23845b;
  --eml-red: #b43b3b;
  --eml-ink: #203040;
}

.reveal .slides {
  color: var(--eml-ink);
}

.reveal .slides section p,
.reveal .slides section li,
.reveal .slides section .mcq,
.reveal .slides section .eml-stage,
.reveal .slides section .eml-task {
  text-indent: 0;
}

.reveal h1,
.reveal h3 {
  color: var(--eml-navy);
}

.reveal .eml-center {
  text-align: center;
}

.reveal .eml-section {
  text-align: center;
}

.reveal .eml-section p {
  font-size: 1.35em;
  line-height: 1.45;
  margin-top: 1.5em;
}

.reveal .eml-quote {
  width: 78%;
  margin: 1.1em auto 0.8em;
  padding: 0.65em 0.9em;
  border-left: 10px solid var(--eml-gold);
  background: #fff8e8;
  color: #523a13;
  font-size: 1.55em;
  font-weight: 700;
  text-align: center;
}

.reveal .eml-prompt,
.reveal .eml-takeaway,
.reveal .eml-warning,
.reveal .eml-goal,
.reveal .eml-closing {
  margin: 0.75em auto 0;
  padding: 0.45em 0.75em;
  border-radius: 10px;
  text-align: center;
}

.reveal .eml-prompt {
  background: #fff5dd;
  border: 2px solid #e2ad43;
}

.reveal .eml-takeaway,
.reveal .eml-goal,
.reveal .eml-closing {
  background: var(--eml-cyan);
  border: 2px solid #8dc8ec;
}

.reveal .eml-warning {
  background: #fff0f0;
  border: 2px solid #df9696;
}

.reveal .eml-roadmap {
  display: grid;
  grid-template-columns: 1fr 80px 1fr 80px 1fr;
  align-items: center;
  gap: 0.25em;
  margin: 1.15em auto;
}

.reveal .eml-stage {
  min-height: 220px;
  padding: 0.65em;
  border: 3px solid #8dc8ec;
  border-radius: 18px;
  background: linear-gradient(145deg, #fff, var(--eml-cyan));
  text-align: center;
  line-height: 1.35;
}

.reveal .eml-number {
  display: block;
  width: 1.7em;
  height: 1.7em;
  margin: 0 auto 0.35em;
  border-radius: 50%;
  color: #fff;
  background: var(--eml-blue);
  font-size: 1.15em;
  line-height: 1.7em;
}

.reveal .eml-arrow {
  color: var(--eml-gold);
  font-size: 2.2em;
  text-align: center;
}

.reveal .mcq {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.55em;
  margin-top: 0.8em;
}

.reveal .mcq button {
  min-height: 105px;
  padding: 0.55em 0.75em;
  border: 3px solid #93b8d5;
  border-radius: 12px;
  background: #f7fbff;
  color: var(--eml-ink);
  font: inherit;
  font-size: 0.72em;
  line-height: 1.25;
  text-align: left;
  cursor: pointer;
}

.reveal .mcq button:hover,
.reveal .mcq button:focus-visible {
  border-color: var(--eml-blue);
  background: var(--eml-cyan);
}

.reveal .mcq button.is-correct {
  border-color: var(--eml-green);
  background: #e7f7ef;
}

.reveal .mcq button.is-wrong {
  border-color: var(--eml-red);
  background: #fff0f0;
}

.reveal .mcq-feedback {
  grid-column: 1 / -1;
  min-height: 2.6em;
  margin: 0.15em 0 0;
  padding: 0.35em 0.6em;
  border-radius: 8px;
  background: #edf2f6;
  font-size: 0.65em;
  text-align: center;
}

.reveal .mcq-feedback.is-correct {
  color: #145c3d;
  background: #e7f7ef;
}

.reveal .mcq-feedback.is-wrong {
  color: #842d2d;
  background: #fff0f0;
}

.reveal .eml-equations {
  margin-top: 0.55em;
  padding: 0.5em 0.7em;
  border-radius: 14px;
  background: #f5f9fc;
  font-size: 0.92em;
}

.reveal .eml-symbol-key {
  margin-top: 0.65em;
  text-align: center;
  font-size: 0.82em;
}

.reveal table {
  font-size: 0.78em;
}

.reveal .eml-error-box {
  margin: 0.8em auto;
  padding: 0.7em 0.9em;
  border: 3px dashed var(--eml-red);
  border-radius: 12px;
  background: #fff7f7;
  font-size: 1.05em;
  line-height: 1.55;
}

.reveal .eml-decode-grid,
.reveal .eml-task-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.65em;
  margin-top: 0.7em;
}

.reveal .eml-decode-card,
.reveal .eml-task {
  padding: 0.55em 0.7em;
  border-left: 8px solid var(--eml-blue);
  border-radius: 8px;
  background: #f2f8fc;
  text-align: left;
}

.reveal .eml-decode-card p,
.reveal .eml-task p {
  margin: 0.2em 0;
}

.reveal .eml-matrix-map {
  width: 84%;
  margin: 0 auto;
}

.reveal .eml-triangle {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75em;
  margin-top: 1em;
}

.reveal .eml-triangle-card {
  min-height: 250px;
  padding: 0.55em 0.7em;
  border: 3px solid #8dc8ec;
  border-radius: 50% 50% 16px 16px;
  background: linear-gradient(#fff, #edf7ff);
  text-align: center;
}

.reveal .eml-triangle-title {
  display: block;
  margin: 0.45em 0 0.35em;
  color: var(--eml-navy);
  font-size: 1.35em;
  line-height: 1.2;
}

.reveal .eml-summary {
  width: 72%;
  margin: 0.8em auto;
  padding: 0.65em;
  border-radius: 16px;
  background: linear-gradient(120deg, #edf7ff, #fff8e8);
  font-size: 1.2em;
  line-height: 1.7;
  text-align: center;
}

.reveal img {
  max-height: 580px;
  object-fit: contain;
}

@media (max-width: 900px) {
  .reveal .eml-roadmap {
    grid-template-columns: 1fr;
  }

  .reveal .eml-arrow {
    transform: rotate(90deg);
  }
}