/* Sessão 1: aprofundamento legível dos cinco nós do cérebro. */
body.modal-open {
  overflow: hidden;
}

.node-modal[hidden] {
  display: none;
}

.node-modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  padding: 24px;
  color: var(--ink);
}

.node-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(3, 4, 10, .82);
  backdrop-filter: blur(14px);
}

.node-modal-dialog {
  position: relative;
  width: min(920px, 100%);
  max-height: min(88svh, 800px);
  overflow-y: auto;
  padding: clamp(26px, 4vw, 48px);
  border: 1px solid rgba(155, 124, 255, .72);
  border-radius: 16px;
  background:
    radial-gradient(circle at 84% 8%, rgba(155, 124, 255, .16), transparent 34%),
    linear-gradient(145deg, #111021, #080b12 72%);
  box-shadow: 0 30px 120px rgba(0, 0, 0, .72), 0 0 70px rgba(155, 124, 255, .16);
  opacity: 0;
  transform: translateY(18px) scale(.98);
  transition: opacity .24s ease, transform .24s ease;
}

.node-modal.is-open .node-modal-dialog {
  opacity: 1;
  transform: none;
}

.node-modal-close {
  position: absolute;
  top: 22px;
  right: 22px;
  min-width: 44px;
  min-height: 44px;
  padding: 8px 12px;
  border: 1px solid rgba(155, 124, 255, .42);
  border-radius: 8px;
  color: var(--ink);
  background: rgba(155, 124, 255, .08);
  font: 14px var(--mono);
  cursor: pointer;
}

.node-modal-close:hover,
.node-modal-close:focus-visible {
  border-color: var(--acid);
  color: #08070d;
  background: var(--acid);
}

.node-modal-kicker {
  margin: 0 70px 12px 0;
  color: var(--cyan);
  font: 14px var(--mono);
  letter-spacing: .08em;
}

.node-modal-dialog h2 {
  max-width: 720px;
  margin: 0;
  color: var(--ink);
  font-size: clamp(2rem, 5vw, 4.4rem);
  line-height: .96;
  letter-spacing: -.07em;
}

.node-modal-summary {
  max-width: 720px;
  margin: 18px 0 0;
  color: #d8d9e9;
  font-size: clamp(1rem, 1.5vw, 1.2rem);
  line-height: 1.6;
}

.node-modal-main {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
  gap: 24px;
  margin-top: 34px;
}

.node-modal-visual,
.node-modal-explanation,
.node-modal-proof {
  padding: 22px;
  border: 1px solid rgba(155, 124, 255, .28);
  border-radius: 12px;
  background: rgba(6, 8, 15, .6);
}

.node-modal-dialog h3 {
  margin: 0 0 16px;
  color: var(--ink);
  font-size: 1.15rem;
  line-height: 1.25;
}

.node-modal-explanation p,
.node-modal-proof p {
  margin: 0;
  color: #d8d9e9;
  font-size: 1rem;
  line-height: 1.7;
}

.node-modal-visual-grid {
  display: grid;
  gap: 10px;
}

.node-modal-visual-item {
  display: grid;
  gap: 5px;
  padding: 14px;
  border-left: 3px solid var(--acid);
  background: rgba(155, 124, 255, .1);
}

.node-modal-visual-item strong {
  color: var(--ink);
  font-size: 1rem;
}

.node-modal-visual-item span {
  color: #c9cbe0;
  font-size: .95rem;
  line-height: 1.45;
}

.node-modal-flow {
  display: grid;
  gap: 8px;
  margin-top: 20px;
}

.node-modal-flow-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border: 1px solid rgba(94, 226, 219, .3);
  color: #e5e8f7;
  font-size: .95rem;
}

.node-modal-flow-item::before {
  content: '→';
  color: var(--cyan);
  font: 1rem var(--mono);
}

.node-modal-proof {
  margin-top: 24px;
}

.node-modal-proof-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.node-modal-proof-item {
  min-height: 88px;
  padding: 14px;
  border: 1px solid rgba(155, 124, 255, .28);
  background: rgba(155, 124, 255, .08);
}

.node-modal-proof-item strong,
.node-modal-proof-item span {
  display: block;
}

.node-modal-proof-item strong {
  color: var(--cyan);
  font-size: 1rem;
  line-height: 1.3;
}

.node-modal-proof-item span {
  margin-top: 8px;
  color: #c9cbe0;
  font-size: .95rem;
  line-height: 1.4;
}

.node-modal-footer {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-top: 24px;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, .12);
}

.node-modal-footer h3 {
  margin-bottom: 8px;
}

.node-modal-footer p {
  margin: 0;
  color: #d8d9e9;
  font-size: 1rem;
  line-height: 1.6;
}

.node-modal-stack {
  color: var(--cyan) !important;
}

@media (max-width: 700px) {
  .node-modal {
    padding: 12px;
  }

  .node-modal-dialog {
    max-height: 92svh;
    padding: 24px 18px;
  }

  .node-modal-main,
  .node-modal-footer {
    grid-template-columns: 1fr;
  }

  .node-modal-proof-grid {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .node-modal-dialog {
    transition: none;
  }
}