/* Módulo 3 — Amostragem (milho-pipoca) — sem sticky rail */
.pm3 {
  --pm3-ink: #0f1f18;
  --pm3-muted: #5a7268;
  --pm3-line: rgba(15, 31, 24, 0.12);
  --pm3-green: #1a6b4a;
  --pm3-green-soft: #e8f5ee;
  --pm3-gold: #b08a3c;
  --pm3-gold-soft: #f7f0e2;
  --pm3-cream: #f7f5f0;
  --pm3-panel: #143d2c;
  --pm3-warn: #fff8f0;
  --pm3-danger: #fdecea;
  color: var(--pm3-ink);
  display: grid;
  gap: 0;
}

.pm3 * { box-sizing: border-box; }

.pm3-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 14px;
}

.pm3-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  background: var(--pm3-green-soft);
  color: var(--pm3-green);
  border: 1px solid rgba(26, 107, 74, 0.18);
}

.pm3-chip--gold {
  background: var(--pm3-gold-soft);
  color: #7a5c1e;
  border-color: rgba(176, 138, 60, 0.28);
}

.pm3 > h2 {
  margin: 0 0 6px;
  font-size: clamp(1.45rem, 2.6vw, 1.85rem);
  line-height: 1.2;
  color: var(--pm3-ink);
}

.pm3-sub {
  margin: 0 0 10px;
  font-size: 1.05rem;
  color: var(--pm3-muted);
  max-width: 62ch;
}

.pm3-time {
  margin: 0 0 18px;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--pm3-green);
}

.pm3-lede {
  font-size: 1.08rem;
  line-height: 1.65;
  color: var(--pm3-muted);
  max-width: 68ch;
  margin: 0 0 18px;
}

.pm3-main {
  display: grid;
  gap: 36px;
  min-width: 0;
}

.pm3-section {
  scroll-margin-top: 96px;
}

.pm3-section h3 {
  margin: 0 0 12px;
  font-size: clamp(1.18rem, 2.2vw, 1.4rem);
  line-height: 1.25;
  color: var(--pm3-ink);
}

.pm3-section h4 {
  margin: 16px 0 8px;
  font-size: 1.02rem;
  color: var(--pm3-green);
}

.pm3-section p {
  margin: 0 0 14px;
  font-size: 1.02rem;
  line-height: 1.68;
  color: var(--pm3-ink);
  max-width: 68ch;
}

.pm3-section p.pm3-muted { color: var(--pm3-muted); }

.pm3-kicker {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--pm3-gold);
  margin-bottom: 8px;
  font-weight: 800;
}

.pm3-reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.pm3-reveal.is-in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .pm3-reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

.pm3-box {
  margin: 16px 0;
  padding: 16px 18px;
  border-radius: 14px;
  border: 1px solid var(--pm3-line);
  background: #fff;
}

.pm3-box--guide {
  background: var(--pm3-gold-soft);
  border-color: rgba(176, 138, 60, 0.28);
}

.pm3-box--key {
  background: var(--pm3-green-soft);
  border-color: rgba(26, 107, 74, 0.22);
}

.pm3-box--warn {
  background: var(--pm3-warn);
  border-color: rgba(176, 100, 40, 0.25);
}

.pm3-box--strong {
  background: var(--pm3-panel);
  color: #f3faf6;
  border-color: var(--pm3-panel);
}

.pm3-box--practice {
  background: var(--pm3-gold-soft);
  border-color: rgba(176, 138, 60, 0.28);
}

.pm3-box--practice .btn {
  margin-top: 4px;
}

.pm3-box--strong .pm3-kicker,
.pm3-box--strong p { color: #f3faf6; }
.pm3-box--strong p { opacity: 0.92; }

.pm3-box p:last-child { margin-bottom: 0; }

.pm3-box > strong.pm3-q {
  display: block;
  font-size: 1.05rem;
  line-height: 1.45;
  margin-bottom: 10px;
  color: var(--pm3-ink);
}

.pm3-callout {
  margin: 0 0 18px;
  padding: 18px 20px;
  border-radius: 16px;
  border-left: 4px solid var(--pm3-gold);
  background: linear-gradient(135deg, var(--pm3-gold-soft), #fff);
  border: 1px solid rgba(176, 138, 60, 0.28);
  border-left-width: 4px;
}

.pm3-callout p {
  margin: 0;
  font-size: 1.05rem;
  line-height: 1.55;
  color: var(--pm3-ink);
  max-width: none;
  font-weight: 600;
}

.pm3-flow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin: 18px 0;
  padding: 18px 14px;
  border-radius: 16px;
  background: var(--pm3-cream);
  border: 1px solid var(--pm3-line);
}

.pm3-flow--col {
  flex-direction: column;
}

.pm3-flow-node {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  min-width: 100px;
  min-height: 56px;
  padding: 10px 12px;
  border-radius: 12px;
  background: #fff;
  border: 1px solid var(--pm3-line);
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  text-align: center;
  line-height: 1.25;
  color: var(--pm3-ink);
}

.pm3-flow-node--end {
  background: var(--pm3-green);
  color: #fff;
  border-color: var(--pm3-green);
}

.pm3-flow-node--big {
  min-width: 140px;
  font-size: 0.85rem;
  background: var(--pm3-green-soft);
  border-color: rgba(26, 107, 74, 0.22);
  color: var(--pm3-green);
}

.pm3-flow-ico {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--pm3-green-soft);
  color: var(--pm3-green);
  display: grid;
  place-items: center;
  font-size: 0.7rem;
  font-weight: 800;
}

.pm3-flow-node--end .pm3-flow-ico {
  background: rgba(255,255,255,0.2);
  color: #fff;
}

.pm3-flow-arrow {
  color: var(--pm3-muted);
  font-weight: 700;
  font-size: 1.15rem;
  flex: 0 0 auto;
}

.pm3-flow--col .pm3-flow-arrow {
  transform: none;
}

.pm3-grid4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin: 16px 0;
}

.pm3-grid3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: 16px 0;
}

.pm3-grid2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin: 16px 0;
  align-items: start;
}

.pm3-grid6 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 16px 0;
}

.pm3-card {
  margin: 0;
  padding: 16px 18px;
  border-radius: 14px;
  border: 1px solid var(--pm3-line);
  background: #fff;
}

.pm3-card h4 {
  margin: 0 0 6px;
  font-size: 1.05rem;
  color: var(--pm3-green);
}

.pm3-card > p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--pm3-muted);
  max-width: none;
  line-height: 1.55;
}

.pm3-card--ton {
  text-align: center;
  padding: 22px 16px;
  background: linear-gradient(180deg, #fff 0%, var(--pm3-green-soft) 100%);
}

.pm3-card--ton .pm3-ton {
  display: block;
  font-size: clamp(1.35rem, 3vw, 1.7rem);
  font-weight: 800;
  color: var(--pm3-green);
  letter-spacing: 0.02em;
  margin-bottom: 6px;
}

.pm3-card--ton .pm3-pts {
  display: block;
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--pm3-ink);
  margin-bottom: 4px;
}

.pm3-card--ton p {
  font-size: 0.88rem;
  color: var(--pm3-muted);
}

.pm3-card--icon .pm3-ico {
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--pm3-green-soft);
  color: var(--pm3-green);
  font-weight: 800;
  font-size: 0.85rem;
  margin-bottom: 10px;
}

.pm3-card--icon h4 {
  font-size: 0.98rem;
}

.pm3-card--icon .pm3-cons {
  margin-top: 8px;
  font-size: 0.88rem;
  color: var(--pm3-muted);
  line-height: 1.45;
}

.pm3-card--icon .pm3-cons strong {
  color: var(--pm3-ink);
  font-weight: 700;
}

.pm3-visual {
  display: block;
  margin-top: 12px;
  padding: 10px 12px;
  border-radius: 10px;
  background: var(--pm3-cream);
  font-size: 0.78rem;
  font-style: italic;
  color: var(--pm3-muted);
  line-height: 1.4;
}

.pm3-check {
  margin: 16px 0;
  padding: 18px 20px;
  border-radius: 14px;
  background: #fff;
  border: 1px solid var(--pm3-line);
}

.pm3-check strong.pm3-check-title {
  display: block;
  margin-bottom: 12px;
  font-size: 1.02rem;
  color: var(--pm3-green);
}

.pm3-check ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.pm3-check li {
  position: relative;
  padding: 6px 0 6px 28px;
  font-size: 0.98rem;
  line-height: 1.5;
  color: var(--pm3-ink);
  border-bottom: 1px solid var(--pm3-line);
}

.pm3-check li:last-child { border-bottom: 0; }

.pm3-check li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 6px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--pm3-green-soft);
  color: var(--pm3-green);
  font-size: 0.72rem;
  font-weight: 800;
  display: grid;
  place-items: center;
}

.pm3-figure {
  margin: 18px 0;
}

.pm3-figure-media {
  margin: 0;
  padding: 12px;
  border-radius: 16px;
  background: #f5f7fb;
  border: 1px solid var(--pm3-line);
  overflow: hidden;
}

.pm3-figure-media--wide {
  padding: 10px;
}

.pm3-figure-media img {
  display: block;
  width: 100%;
  height: auto;
  max-height: none;
  object-fit: contain;
  object-position: center;
  border-radius: 10px;
  background: #fff;
}

.pm3-figure-media--equip {
  background: #fff;
  display: grid;
  place-items: center;
  min-height: 280px;
}

.pm3-figure-media--equip img {
  max-height: 420px;
  width: auto;
  max-width: 100%;
  margin: 0 auto;
}

.pm3-figure figcaption {
  margin-top: 10px;
  font-size: 0.88rem;
  line-height: 1.45;
  color: var(--pm3-muted);
  text-align: center;
}

.pm3-depth {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 16px 0;
  align-items: stretch;
}

.pm3-depth-stack {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px;
  border-radius: 14px;
  background: var(--pm3-cream);
  border: 1px solid var(--pm3-line);
}

.pm3-depth-layer {
  padding: 14px 16px;
  border-radius: 10px;
  text-align: center;
  font-weight: 800;
  font-size: 0.88rem;
  letter-spacing: 0.04em;
  color: #fff;
}

.pm3-depth-layer--top { background: #2c8463; }
.pm3-depth-layer--mid { background: #1a6b4a; }
.pm3-depth-layer--bot { background: #143d2c; }

.pm3-depth-plus {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin: 16px 0;
  padding: 16px;
  border-radius: 14px;
  background: var(--pm3-green-soft);
  border: 1px solid rgba(26, 107, 74, 0.18);
}

.pm3-depth-plus span {
  padding: 8px 12px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--pm3-line);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--pm3-ink);
}

.pm3-depth-plus .pm3-op {
  font-weight: 800;
  color: var(--pm3-green);
  background: transparent;
  border: 0;
  padding: 0;
}

.pm3-depth-plus .pm3-result {
  background: var(--pm3-green);
  color: #fff;
  border-color: var(--pm3-green);
}

.pm3-bigstat {
  margin: 16px 0;
  padding: 28px 20px;
  border-radius: 16px;
  text-align: center;
  background: var(--pm3-panel);
  color: #f3faf6;
  box-shadow: 0 14px 36px rgba(15, 31, 24, 0.16);
}

.pm3-bigstat .pm3-kicker { color: var(--pm3-gold); }

.pm3-bigstat strong {
  display: block;
  font-size: clamp(1.35rem, 3.2vw, 1.85rem);
  letter-spacing: 0.03em;
  line-height: 1.3;
  margin: 6px 0 0;
}

.pm3-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin: 16px 0;
}

.pm3-compare-card {
  padding: 18px;
  border-radius: 14px;
  border: 1px solid var(--pm3-line);
}

.pm3-compare-card--bad {
  background: var(--pm3-danger);
  border-color: rgba(180, 60, 50, 0.22);
}

.pm3-compare-card--good {
  background: var(--pm3-green-soft);
  border-color: rgba(26, 107, 74, 0.22);
}

.pm3-compare-card .pm3-tag {
  display: inline-block;
  margin-bottom: 10px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.06em;
}

.pm3-compare-card--bad .pm3-tag {
  background: rgba(180, 60, 50, 0.12);
  color: #9b2c2c;
}

.pm3-compare-card--good .pm3-tag {
  background: rgba(26, 107, 74, 0.14);
  color: var(--pm3-green);
}

.pm3-compare-card p {
  margin: 0;
  font-size: 0.95rem;
  max-width: none;
}

.pm3-compare-card .pm3-mini-flow {
  margin-top: 10px;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--pm3-green);
  line-height: 1.6;
}

.pm3-vias {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin: 16px 0;
}

.pm3-via {
  padding: 18px 12px;
  border-radius: 14px;
  text-align: center;
  background: #fff;
  border: 2px dashed rgba(26, 107, 74, 0.35);
}

.pm3-via strong {
  display: block;
  font-size: 1.05rem;
  color: var(--pm3-green);
  margin-bottom: 4px;
}

.pm3-via span {
  font-size: 0.88rem;
  color: var(--pm3-muted);
  font-weight: 700;
}

.pm3-alert {
  margin: 18px 0;
  padding: 16px 18px;
  border-radius: 12px;
  background: #fff3e8;
  border: 1px solid rgba(176, 100, 40, 0.3);
  border-left: 4px solid #c46a28;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--pm3-ink);
}

.pm3-summary-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
  margin: 16px 0;
}

.pm3-sum {
  padding: 16px 14px;
  border-radius: 14px;
  background: #fff;
  border: 1px solid var(--pm3-line);
}

.pm3-sum .pm3-num {
  display: block;
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--pm3-gold);
  margin-bottom: 8px;
}

.pm3-sum p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.45;
  color: var(--pm3-ink);
  max-width: none;
}

.pm3-quiz-q {
  margin: 18px 0;
  padding: 18px;
  border-radius: 14px;
  background: #fff;
  border: 1px solid var(--pm3-line);
}

.pm3-quiz-q > p {
  margin: 0 0 12px;
  font-weight: 700;
  max-width: none;
}

.pm3-opts {
  display: grid;
  gap: 8px;
}

.pm3-opts button {
  appearance: none;
  text-align: left;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--pm3-line);
  background: var(--pm3-cream);
  color: var(--pm3-ink);
  font: inherit;
  font-size: 0.95rem;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.pm3-opts button:hover:not(:disabled) {
  border-color: rgba(26, 107, 74, 0.4);
  background: #fff;
}

.pm3-opts button.is-correct {
  background: var(--pm3-green-soft);
  border-color: var(--pm3-green);
  font-weight: 700;
}

.pm3-opts button.is-wrong {
  background: var(--pm3-danger);
  border-color: rgba(180, 60, 50, 0.35);
}

.pm3-opts button:disabled { cursor: default; opacity: 0.95; }

.pm3-fb {
  display: none;
  margin-top: 12px;
  padding: 12px 14px;
  border-radius: 10px;
  background: var(--pm3-green-soft);
  border: 1px solid rgba(26, 107, 74, 0.22);
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--pm3-ink);
}

.pm3-fb.is-on { display: block; }

.pm3-banner {
  margin: 8px 0 18px;
  padding: 28px 22px;
  border-radius: 18px;
  text-align: center;
  background:
    radial-gradient(circle at 20% 20%, rgba(176, 138, 60, 0.22), transparent 45%),
    linear-gradient(160deg, #143d2c 0%, #1a6b4a 100%);
  color: #f3faf6;
  box-shadow: 0 18px 42px rgba(15, 31, 24, 0.18);
}

.pm3-banner strong {
  display: block;
  font-size: clamp(1.05rem, 2.4vw, 1.35rem);
  line-height: 1.4;
  letter-spacing: 0.02em;
  margin-bottom: 12px;
}

.pm3-banner p {
  margin: 0 auto 18px;
  max-width: 48ch;
  font-size: 0.92rem;
  opacity: 0.88;
  color: #f3faf6;
}

.pm3-banner .btn {
  margin-top: 4px;
}

.pm3-ref {
  margin: 8px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--pm3-line);
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--pm3-muted);
}

.pm3-ref strong {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 6px;
  color: var(--pm3-muted);
  font-weight: 800;
}

@media (max-width: 960px) {
  .pm3-grid4,
  .pm3-summary-grid {
    grid-template-columns: 1fr 1fr;
  }
  .pm3-grid6 {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 860px) {
  .pm3-grid3,
  .pm3-grid2,
  .pm3-compare,
  .pm3-depth,
  .pm3-vias {
    grid-template-columns: 1fr;
  }

  .pm3-flow:not(.pm3-flow--col) {
    flex-direction: column;
  }

  .pm3-flow:not(.pm3-flow--col) .pm3-flow-arrow {
    transform: rotate(90deg);
  }

  .pm3-flow-node {
    width: 100%;
    max-width: 280px;
  }

  .pm3-grid4,
  .pm3-grid6,
  .pm3-summary-grid {
    grid-template-columns: 1fr;
  }
}