:root {
  --bg: #26282b;
  --blue-deep: #000000;
  --blue-mid: #1a1a1a;
  --cyan: #5fb3ff;
  --paper: #dce6f2;
  --paper-soft: #8fa3c2;
  --line: rgba(120, 170, 255, 0.22);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html,
body {
  height: 100%;
  height: 100dvh;
  /*background: radial-gradient(ellipse at 30% 20%, var(--blue-mid) 0%, var(--blue-deep) 75%);*/
  background: radial-gradient(circle at top, #38415c 0%, var(--bg) 65%);
  color: var(--paper);
  font-family: 'Inter', sans-serif;
  overflow: hidden;
}

#graph-holder {
  position: absolute;
  inset: 0;
  z-index: 1;
  cursor: grab;
  /* Entrega os gestos de toque para os handlers de pointer (orbita/pinca)
     em vez de deixar o navegador rolar ou dar zoom na pagina. */
  touch-action: none;
}

#graph-holder.dragging {
  cursor: grabbing;
}

canvas {
  display: block;
}

#back-home-btn {
  position: absolute;
  left: 20px;
  top: 20px;
  z-index: 10;
}

/* Botao de pausar a animacao: discreto, logo abaixo do de voltar. Reaproveita
   .header-home-button (theme.css); aqui so posicao e discricao. */
#btn-animacao {
  position: absolute;
  left: 20px;
  top: 64px;
  z-index: 10;
  opacity: 0.55;
  font-family: 'IBM Plex Mono', monospace;
}

#btn-animacao:hover,
#btn-animacao:focus-visible {
  opacity: 1;
}

#titleblock {
  position: absolute;
  left: 20px;
  bottom: 20px;
  z-index: 5;
  font-family: 'IBM Plex Mono', monospace;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: transparent;
  backdrop-filter: blur(6px);
  min-width: 280px;
  font-size: 0.68rem;
  letter-spacing: 0.03em;
}

#titleblock .row {
  display: flex;
  border-bottom: 1px solid var(--line);
}

#titleblock .row:last-child {
  border-bottom: none;
}

#titleblock .cell {
  padding: 6px 10px;
  flex: 1;
  border-right: 1px solid var(--line);
}

#titleblock .cell:last-child {
  border-right: none;
}

#titleblock .label {
  color: var(--paper-soft);
  font-size: 0.6rem;
  text-transform: uppercase;
  display: block;
  margin-bottom: 2px;
}

#titleblock .value {
  color: var(--cyan);
  font-weight: 600;
}

#titleblock .main-title {
  padding: 10px;
  font-size: 0.85rem;
  color: var(--paper);
  font-weight: 600;
  letter-spacing: 0.06em;
  border-bottom: 1px solid var(--line);
}

#tooltip {
  position: absolute;
  z-index: 6;
  pointer-events: none;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.72rem;
  background: rgba(5, 11, 22, 0.9);
  border: 1px solid var(--cyan);
  color: var(--paper);
  padding: 4px 9px;
  white-space: nowrap;
  opacity: 0;
  transform: translate(-50%, -140%);
  transition: opacity 0.12s ease;
}

#painel {
  position: absolute;
  right: 20px;
  top: 20px;
  z-index: 5;
  width: min(300px, 88vw);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 18px;

  backdrop-filter: blur(10px);
  font-size: 0.85rem;
}

/* Alca de recolher: so aparece no celular (ver media query no fim). */
#painel-toggle {
  display: none;
}

#trilha {
  padding: 10px 16px;
  border-bottom: 1px solid var(--line);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.65rem;
  color: var(--paper-soft);
  letter-spacing: 0.03em;
}

#trilha span {
  cursor: pointer;
}

#trilha span.atual {
  color: var(--paper);
  font-weight: 100;
  cursor: default;
}

#trilha span.destacado,
.filho.destacado {
  font-weight: 100;
  border-radius: 3px;
}

#trilha span.destacado {
  padding: 1px 4px;
  margin: -1px -4px;
}

.filho.destacado .ponto {
  box-shadow: 0 0 6px #0a0a0a;
}

#trilha i {
  margin: 0 5px;
  opacity: 0.5;
  font-style: normal;
}

#painel h2 {
  font-size: 1.1rem;
  font-weight: 600;
  padding: 14px 16px 4px;
  color: var(--paper);
}

#descricao {
  padding: 0 16px 12px;
  font-size: 0.78rem;
  color: var(--paper-soft);
  line-height: 1.4;
}

#cabecalho-filhos {
  padding: 0 16px 6px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.6rem;
  color: var(--paper-soft);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

#lista-filhos {
  padding: 0 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.filho {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 8px 6px;
  cursor: pointer;
  border-radius: 6px;
  transition: background 0.15s;
}

.filho:hover {
  background: rgba(255, 255, 255, 0.06);
}

.filho .ponto {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cor);
  box-shadow: 0 0 6px var(--cor);
  flex-shrink: 0;
}

.sem-filhos {
  padding: 6px 6px 2px;
  font-size: 0.75rem;
  color: var(--paper-soft);
  font-style: italic;
}

#painel .rodape {
  padding: 12px 16px;
  border-top: 1px solid var(--line);
}

#btn-voltar {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--paper-soft);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: 0.15s;
}

#btn-voltar:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.06);
  color: var(--paper);
}

#btn-voltar:disabled {
  opacity: 0.35;
  cursor: default;
}

/* ---------------------------------------------------------------------
   Celular: o titleblock e omitido e o painel vira um bottom sheet, ancorado
   no rodape e recolhivel, para nunca cobrir o centro da animacao 3D.
   --------------------------------------------------------------------- */
@media (max-width: 600px) {
  #titleblock {
    display: none;
  }

  #back-home-btn {
    left: 12px;
    top: 12px;
    min-height: 44px;
    padding: 8px 14px;
  }

  #btn-animacao {
    left: 12px;
    top: 64px;
    min-height: 44px;
    padding: 8px 14px;
  }

  #painel {
    left: 0;
    right: 0;
    top: auto;
    bottom: 0;
    width: 100%;
    max-height: 45dvh;
    /* Com 45dvh nao sobra altura para manter trilha, titulo, descricao e
       rodape fixos e ainda dar espaco a lista: o painel inteiro rola. */
    overflow-y: auto;
    overscroll-behavior: contain;
    border-radius: 18px 18px 0 0;
    border-bottom: none;
    /* backdrop-filter sozinho nao da contraste suficiente sobre o canvas. */
    background: rgba(20, 22, 28, 0.72);
    transition: transform 0.3s ease;
  }

  #painel.recolhido {
    transform: translateY(calc(100% - 44px));
  }

  /* Sticky para a alca continuar alcancavel enquanto o painel rola. */
  #painel-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    position: sticky;
    top: 0;
    z-index: 1;
    width: 100%;
    min-height: 44px;
    padding: 0;
    border: none;
    /* Mais opaco que o painel: a alca fica sobre o conteudo que rola. */
    background: rgba(20, 22, 28, 0.95);
    cursor: pointer;
  }

  /* Barrinha visual da alca. */
  #painel-toggle::before {
    content: '';
    width: 38px;
    height: 4px;
    border-radius: 999px;
    background: var(--paper-soft);
    opacity: 0.6;
  }

}