/* ===== Estilo base ===== */
body {
  font-family: 'Segoe UI', 'Roboto', sans-serif;
  color: #222;
  background: linear-gradient(to right, #f5f7fa, #c3cfe2);
}

h1, h2, h3, h4 {
  font-weight: 700;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.1);
}

.display-5,
.resultado-titulo {
  color: #111;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.6);
}

.lead,
.resultado-info {
  color: #111 !important;
  font-size: 1.1rem;
  font-weight: 500;
  text-shadow: none !important;
}

.resultado-base {
  font-weight: 600;
  font-size: 1rem;
  color: #222 !important;
  text-shadow: none !important;
}

/* ===== Navbar visual ===== */
.navbar {
  background-color: rgba(20, 20, 20, 0.6) !important;
  backdrop-filter: blur(6px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.navbar-brand {
  font-weight: bold;
  color: #fff !important;
  text-shadow: 1px 1px 2px #000;
}

/* ===== Cards com animação visual ===== */
.card {
  border-radius: 1rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(4px);
}

.card:hover {
  transform: scale(1.02);
  box-shadow: 0 0.5rem 1.2rem rgba(0, 0, 0, 0.1);
}

/* ===== Botões com visual arredondado e moderno ===== */
.btn {
  border-radius: 50px;
  font-weight: 600;
}

/* ===== Botão de alternância de tema 🌓 ===== */
#toggle-theme {
  z-index: 1000;
  font-size: 1.2rem;
  padding: 0.4rem 0.6rem;
  border-radius: 50px;
  backdrop-filter: blur(5px);
  background-color: rgba(0, 0, 0, 0.3);
  border: 1px solid #555;
  color: #fff;
}

[data-bs-theme="light"] #toggle-theme {
  color: #000;
  border-color: #555;
  background-color: rgba(255, 255, 255, 0.5);
}

/* ===== Footer ===== */
footer {
  margin-top: 60px;
  padding-top: 20px;
  border-top: 1px solid #ddd;
  font-size: 0.9rem;
  color: #666;
}

/* ===== Paleta personalizada para botões ===== */
.btn-success { background-color: #2e7d32; border-color: #2e7d32; }
.btn-danger { background-color: #c62828; border-color: #c62828; }
.btn-secondary { background-color: #5d647b; border-color: #5d647b; }
.btn-warning { background-color: #f9a825; border-color: #f9a825; color: #fff; }
.btn-info { background-color: #039be5; border-color: #039be5; }
.btn-dark { background-color: #212121; border-color: #212121; }
.btn-primary { background-color: #1565c0; border-color: #1565c0; }

/* ===== Estilo para fundo de partículas ===== */
#particles-js {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  background: linear-gradient(135deg, #e8f0ff, #d2f2d2);
}

/* ===== Modo Escuro Automático ===== */
[data-bs-theme="dark"] body {
  background: linear-gradient(to right, #0f2027, #203a43, #2c5364);
  color: #e0e0e0;
}

[data-bs-theme="dark"] .card {
  background-color: rgba(30, 30, 30, 0.85);
  border-color: #444;
  color: #fff;
}

[data-bs-theme="dark"] .navbar {
  background-color: rgba(0, 0, 0, 0.7) !important;
  box-shadow: 0 0 8px rgba(0, 0, 0, 0.5);
}

[data-bs-theme="dark"] .navbar-brand {
  color: #ffffff !important;
  text-shadow: 1px 1px 2px #000;
}

[data-bs-theme="dark"] .display-5,
[data-bs-theme="dark"] .resultado-titulo {
  color: #ffffff;
  text-shadow: 0 0 6px rgba(0, 0, 0, 0.7);
}

[data-bs-theme="dark"] .lead,
[data-bs-theme="dark"] .resultado-info {
  color: #e0e0e0 !important;
  text-shadow: none !important;
}


[data-bs-theme="dark"] .resultado-base {
  color: #ffffff !important;
  text-shadow: 0 0 1px rgba(0, 0, 0, 0.8);
}

[data-bs-theme="dark"] footer {
  color: #aaa;
  border-top-color: #444;
}