/* ===== Dropdown Botão Estudos ===== */
.dropdown {
  position: relative;
  display: inline-block;
}

.dropbtn {
  background-color: #38bdf8; /* azul do tema */
  color: #020617;
  padding: 12px 22px;
  font-size: 16px;
  border: none;
  cursor: pointer;
  border-radius: 999px;
  font-weight: 700;
  transition: background 0.2s ease;
}

.dropbtn:hover {
  background-color: #0ea5e9; /* hover azul mais escuro */
}

.dropdown-content {
  display: none;
  position: absolute;
  background-color: #f9f9f9;
  min-width: 180px;
  box-shadow: 0px 8px 16px rgba(0,0,0,0.25);
  z-index: 100;
  border-radius: 8px;
  overflow: hidden;
}

.dropdown-content a {
  color: #020617;
  padding: 10px 16px;
  text-decoration: none;
  display: block;
  font-weight: 600;
  transition: background 0.2s ease;
}

.dropdown-content a:hover {
  background-color: #e0f2fe; /* azul claro hover */
}

.dropdown:hover .dropdown-content {
  display: block;
}

/* ===== Cards Estudos (Idiomas) ===== */

.lang-buttons {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-top: 24px;
}

.lang-buttons a {
  background: linear-gradient(135deg, #38bdf8, #0ea5e9);
  color: #020617;
  padding: 22px 28px;
  border-radius: 16px;
  font-weight: 700;
  text-decoration: none;
  min-width: 240px;
  text-align: center;

  box-shadow: 0 10px 24px rgba(56, 189, 248, 0.28);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.lang-buttons a:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 42px rgba(56, 189, 248, 0.4);
}

.lang-buttons a:active {
  transform: scale(0.98);
}

/* ===== Research Cards (AZUIS) ===== */

.research-section {
  max-width: 760px;
  margin: 0 auto;
  padding: 40px 20px;
  text-align: center;
}

.research-desc {
  color: #cbd5f5;
  margin-bottom: 28px;
  font-size: 0.95rem;
}

.research-cards {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.research-card {
  background: #1e293b;
  border-radius: 16px;
  padding: 26px 28px;
  box-shadow: 0 12px 30px rgba(0,0,0,0.35);
  text-align: left;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.research-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 40px rgba(0,0,0,0.45);
}

.research-card h3 {
  margin: 0 0 10px;
  color: #e5e7eb;
  font-size: 1.1rem;
}

.research-card p {
  margin: 0 0 14px;
  color: #cbd5f5;
  line-height: 1.5;
}

.research-card a {
  color: #38bdf8;
  font-weight: 600;
  text-decoration: none;
}

.research-card a:hover {
  text-decoration: underline;
}

/* ===== Fundo geral da página ===== */
html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background: linear-gradient(135deg, #020617, #1e293b);
  color: #e5e7eb;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}