* {
  box-sizing: border-box;
  font-family: "Poppins", sans-serif;
}

html,
body {
  max-width: 100%;
  overflow-x: hidden;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background: linear-gradient(to bottom, #3a3a3a, #1a1a1a);
  padding: 24px;
  box-sizing: border-box;
}

.app {
  width: 100%;
  max-width: 320px;
  padding: 24px;
  background: #1a1a1a;
  border: 1px solid #d4af37;
  border-radius: 16px;
  text-align: center;
}

.logo {
  color: #d4af37;
  font-size: 32px;
  margin: 0 0 16px;
}

.gold-image {
  width: 100%;
  margin-bottom: 16px;
}

.field {
  text-align: left;
  margin-bottom: 16px;
}

.field label {
  display: flex;
  align-items: center;
  gap: 6px;
  color: #d4af37;
  font-size: 13px;
  margin-bottom: 6px;
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}
.dot-red {
  background: red;
}
.dot-green {
  background: limegreen;
}

.price-box,
.amount-box {
  border: 1px solid #d4af37;
  border-radius: 8px;
  padding: 12px;
  color: #d4af37;
  font-weight: bold;
  font-size: 18px;
  background: transparent;
  overflow-wrap: break-word;
}

.amount-box {
  display: flex;
  align-items: center;
  gap: 8px;
}

.currency {
  color: #d4af37;
}

.amount-box input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: #d4af37;
  font-size: 18px;
  font-weight: bold;
}

.amount-box input::placeholder {
  color: #8a7a4a;
}

.invest-btn {
  width: 100%;
  padding: 16px;
  background: linear-gradient(to bottom, #f5d76e, #b8860b);
  border: none;
  border-radius: 8px;
  font-size: 20px;
  font-weight: bold;
  color: #1a1a1a;
  cursor: pointer;
  margin-bottom: 12px;
}

.invest-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.footnote {
  font-size: 10px;
  color: #d4af37;
  margin: 0;
}

@media (max-width: 360px) {
  body {
    padding: 12px;
  }

  .app {
    padding: 16px;
  }

  .price-box,
  .amount-box {
    font-size: 15px;
  }
}

/* Popup */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  justify-content: center;
  align-items: center;
}

.overlay.hidden {
  display: none;
}

.popup {
  width: 300px;
  background: #1a1a1a;
  border: 2px solid #d4af37;
  border-radius: 16px;
  padding: 24px;
  text-align: center;
  color: white;
}

.popup h2 {
  color: #d4af37;
  margin-top: 0;
}

.ok-btn {
  width: 100%;
  padding: 12px;
  margin-top: 16px;
  background: linear-gradient(to bottom, #f5d76e, #b8860b);
  border: none;
  border-radius: 8px;
  font-weight: bold;
  font-size: 16px;
  cursor: pointer;
}