/* =========================
   BASE
========================= */
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 24px;
  font-family: "Segoe UI", Roboto, Arial, sans-serif;
  background: #f7f8fa;
  color: #222;
}

/* =========================
   TOPO
========================= */
.topo {
  position: relative;
  margin-bottom: 32px;
  text-align: center;
}

.topo h1 {
  margin: 0 0 8px;
  font-size: 26px;
}

.descricao {
  font-size: 14px;
  color: #555;
}

/* BOTÃO VOLTAR */
.btn-voltar {
  position: absolute;
  left: 0;
  top: 0;
  text-decoration: none;
  font-size: 14px;
  padding: 6px 12px;
  background: #1f2937;
  color: #fff;
  border-radius: 6px;
}

.btn-voltar:hover {
  background: #111827;
}

/* =========================
   SEÇÕES
========================= */
section {
  margin-bottom: 28px;
}

section h2 {
  margin-bottom: 10px;
  font-size: 18px;
}

/* =========================
   GRID DE SÍMBOLOS
========================= */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(40px, 1fr));
  gap: 10px;
  font-size: 22px;
}

.grid span,
.grid {
  cursor: default;
}
/* =========================
   FEEDBACK DE CÓPIA
========================= */
.grid span {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}

.grid span:hover {
  background: #e5e7eb;
}

.grid span.copiado {
  background: #d1fae5;
  transform: scale(1.1);
}
/* =========================
   TOOLTIP "COPIADO"
========================= */
.grid span {
  position: relative;
}

/* Tooltip escondido */
.grid span::after {
  content: "Copiado ✓";
  position: absolute;
  bottom: 110%;
  left: 50%;
  transform: translateX(-50%);
  background: #111827;
  color: #fff;
  font-size: 11px;
  padding: 4px 8px;
  border-radius: 4px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s, transform 0.15s;
}

/* Mostrar tooltip */
.grid span.copiado::after {
  opacity: 1;
  transform: translateX(-50%) translateY(-4px);
}
/* =========================
   LAYOUT GERAL
========================= */
main {
  max-width: 900px;
  margin: 0 auto;
}
/* =========================
   GRID – AJUSTE FINO
========================= */
.grid {
  grid-template-columns: repeat(auto-fill, minmax(44px, 1fr));
  gap: 12px;
}

.grid span {
  font-size: 22px;
  background: #ffffff;
  border: 1px solid #e5e7eb;
}
.grid span:hover {
  background: #f3f4f6;
}

.grid span.copiado {
  background: #d1fae5;
  border-color: #6ee7b7;
}
section {
  padding-bottom: 8px;
  border-bottom: 1px solid #e5e7eb;
}

section:last-child {
  border-bottom: none;
}
@media (max-width: 600px) {

  body {
    padding: 16px;
  }

  .topo h1 {
    font-size: 22px;
  }

  section h2 {
    font-size: 16px;
  }

  .grid {
    grid-template-columns: repeat(auto-fill, minmax(40px, 1fr));
  }
}