:root {
  --bnb-yellow: #F3BA2F;
  --bnb-yellow-dark: #d4a00a;
  --bnb-black: #000000;
  --bnb-dark: #181A20;
  --bnb-grey: #EAECEF;
  --bnb-white: #FFFFFF;
}

/* ---------------- Global ---------------- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, sans-serif;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: linear-gradient(135deg, var(--bnb-dark), #0f0f0f);
  color: var(--bnb-white);
}

/* ---------------- Header/Navbar ---------------- */
header {
  width: 100%;
  background: var(--bnb-black);
  box-shadow: 0 2px 6px rgba(0,0,0,0.3);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.navbar {
  max-width: 1200px;
  margin: auto;
  padding: 15px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo img {
  width: 40px;
  height: 40px;
  object-fit: contain;
}

.logo h1 {
  font-size: 22px;
  font-weight: bold;
  color: var(--bnb-yellow);
}

/* Navigation Links */
.nav-links {
  display: flex;
  gap: 20px;
  align-items: center;
}

.nav-links a {
  text-decoration: none;
  color: var(--bnb-yellow);
  font-size: 16px;
  font-weight: 500;
  transition: color 0.3s ease;
}

.nav-links a:hover {
  color: var(--bnb-yellow-dark);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  margin-left: auto;
}

.hamburger span {
  width: 25px;
  height: 3px;
  background: var(--bnb-yellow);
  border-radius: 2px;
  transition: all 0.3s ease;
}

/* Mobile Navbar */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    flex-direction: column;
    background: #111;
    position: absolute;
    top: 60px;
    right: 20px;
    padding: 15px;
    border-radius: 8px;
    gap: 15px;
    width: 200px;
  }

  .nav-links.show {
    display: flex;
  }

  .hamburger {
    display: flex;
  }
}

/* ---------------- Main Content ---------------- */
main {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 20px;
  gap: 20px;
}

main h1 {
  font-size: 28px;
  color: #FFFFFF;
}

button {
  padding: 12px 24px;
  font-size: 16px;
  font-weight: bold;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  background: var(--bnb-yellow);
  color: var(--bnb-black);
  transition: 0.3s;
}

button:hover {
  background: var(--bnb-yellow-dark);
  box-shadow: 0 0 10px rgba(243, 186, 47, 0.7);
}

#transferBtn {
  margin-top: 20px;
}

#status {
  margin-top: 20px;
  font-size: 14px;
  color: #ccc;
}

/* ---------------- Footer ---------------- */
footer {
  background: var(--bnb-black);
  color: var(--bnb-white);
  padding: 20px 0;
  text-align: center;
}

.footer-container {
  max-width: 1200px;
  margin: auto;
  padding: 0 20px;
  font-size: 14px;
  color: var(--bnb-grey);
}