body {
  margin: 0;
  padding: 0;
  font-family: "Segoe UI", sans-serif;
  background: linear-gradient(to bottom, #eef2f3, #8e9eab);
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 100vh;
  color: #333;
}

.logo {
  max-width: 180px;
  margin: 20px 0;
  border-radius: 8px;
}

.container {
  background-color: white;
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  text-align: center;
  width: 100%;
  max-width: 520px;
  box-sizing: border-box;
}

h2 {
  font-size: 28px;
  margin-bottom: 10px;
}

p {
  font-size: 18px;
  margin-bottom: 20px;
}

input,
select {
  padding: 10px;
  margin: 5px;
  border: 1px solid #ccc;
  border-radius: 6px;
  font-size: 16px;
}

.select-group {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
}

button {
  padding: 12px 24px;
  font-size: 16px;
  color: white;
  background-color: #007bff;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

button:hover {
  background-color: #0056b3;
}

#swap-btn {
  padding: 8px 12px;
  font-size: 18px;
  background-color: #f0f4f8;
  color: #333;
  border: 1px solid #ccc;
  border-radius: 6px;
}

#swap-btn:hover {
  background-color: #dde3ea;
}

.rate-info {
  font-size: 13px;
  color: #888;
  margin-top: 6px;
  margin-bottom: 0;
  min-height: 1.2em;
}

footer {
  margin-top: auto;
  padding: 20px;
  font-size: 14px;
  color: #666;
}

/* ── Crypto section ── */
.crypto-section {
  background: white;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  padding: 24px 28px;
  margin-top: 20px;
  width: 100%;
  max-width: 520px;
  box-sizing: border-box;
}

.crypto-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.crypto-header h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
}

.crypto-live-badge {
  font-size: 11px;
  font-weight: 700;
  color: #e74c3c;
  letter-spacing: 0.5px;
  animation: pulse 1.8s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.4; }
}

.crypto-list {
  display: flex;
  flex-direction: column;
}

.crypto-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid #f2f2f2;
}

.crypto-item:last-child {
  border-bottom: none;
}

.crypto-badge {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: #f0f4f8;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  flex-shrink: 0;
}

.crypto-info {
  display: flex;
  flex-direction: column;
  min-width: 80px;
}

.crypto-name {
  font-size: 14px;
  font-weight: 600;
}

.crypto-symbol {
  font-size: 11px;
  color: #999;
}

.crypto-prices {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

.crypto-brl {
  font-size: 14px;
  font-weight: 600;
}

.crypto-usd {
  font-size: 11px;
  color: #999;
}

.crypto-change {
  font-size: 12px;
  font-weight: 700;
  padding: 3px 7px;
  border-radius: 5px;
  min-width: 56px;
  text-align: center;
}

.crypto-change.up {
  color: #27ae60;
  background: #eafaf1;
}

.crypto-change.down {
  color: #e74c3c;
  background: #fdf2f2;
}

.crypto-stamp {
  font-size: 11px;
  color: #bbb;
  text-align: right;
  margin: 10px 0 0;
}

.crypto-loading,
.crypto-error {
  font-size: 14px;
  color: #999;
  text-align: center;
  padding: 20px 0;
  margin: 0;
}