/* ================= GENERAL ================= */

body {
  font-family: "Segoe UI", sans-serif;
  background-color: #f9fafb;
  color: #333;
  margin: 0;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

header {
  background-color: #1e3a8a;
  color: #fff;
  text-align: center;
  padding: 1rem;
}

.logo {
  font-size: 1.75rem;
  font-weight: bold;
}

.main-content {
  flex: 1;
  padding: 2rem;
  max-width: 1100px;
  margin: auto;
}

footer {
  background-color: #1e3a8a;
  color: white;
  text-align: center;
  padding: 1rem;
  font-size: 0.9rem;
}

/* ================= WARNING ================= */

.warning-banner {
  background-color: #dc2626;
  color: #fff;
  text-align: center;
  font-weight: 600;
  padding: 0.75rem;
  font-size: 1rem;
}

/* ================= LOGIN ================= */

.tab-buttons {
  display: flex;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.tab-buttons button {
  background: #e5e7eb;
  border: none;
  border-radius: 5px;
  margin: 0 0.5rem;
  padding: 0.5rem 1.5rem;
  cursor: pointer;
  font-weight: 600;
}

.tab-buttons button.active,
.tab-buttons button:hover {
  background-color: #1e3a8a;
  color: white;
}

.login-section {
  text-align: center;
  background: #fff;
  padding: 3rem;
  border-radius: 8px;
  box-shadow: 0 3px 6px rgba(0,0,0,0.1);
  max-width: 400px;
  margin: auto;
}

.login-section input {
  width: 100%;
  padding: 0.6rem;
  margin-bottom: 1rem;
  border: 1px solid #ccc;
  border-radius: 5px;
}

.login-section button {
  background-color: #10b981;
  color: white;
  border: none;
  padding: 0.7rem 2rem;
  border-radius: 6px;
  cursor: pointer;
}

.login-section button:hover {
  background-color: #059669;
}

/* ================= CARD GRID ================= */

.card-selection {
  text-align: center;
}

.card-selection h2 {
  color: #1e3a8a;
  margin-bottom: 2rem;
}

.card-grid {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  justify-content: center;
}

.card-item {
  background: #fff;
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
  width: 260px;
  cursor: pointer;
  transition: transform 0.3s;
}

.card-item:hover {
  transform: translateY(-6px);
}

.card-item img {
  width: 100px;
  margin-bottom: 1rem;
}

.card-item button {
  margin-top: 1rem;
  background-color: #2563eb;
  color: white;
  border: none;
  padding: 0.6rem 1.5rem;
  border-radius: 6px;
  cursor: pointer;
}

.card-item button:hover {
  background-color: #1d4ed8;
}

/* ================= BTC PAYMENT ================= */

.btc-section {
  background: #ffffff;
  padding: 2rem;
  border-radius: 10px;
  box-shadow: 0 3px 8px rgba(0,0,0,0.1);
  max-width: 500px;
  margin: 2rem auto;
  text-align: center;
}

.btc-section h2 {
  color: #1e3a8a;
  margin-bottom: 1rem;
}

.btc-box {
  background: #f3f4f6;
  padding: 1rem;
  border-radius: 8px;
  margin: 1rem 0;
  border: 1px solid #e5e7eb;
  word-break: break-all;
}

.btc-box p {
  margin: 0.5rem 0;
  font-weight: 600;
}

.btc-box button {
  background-color: #f7931a;
  color: white;
  border: none;
  padding: 0.6rem 1.2rem;
  border-radius: 6px;
  cursor: pointer;
  margin-top: 0.7rem;
}

.btc-box button:hover {
  opacity: 0.9;
}

/* ================= TELEGRAM ================= */

.telegram-btn {
  display: inline-block;
  margin-top: 1.2rem;
  background: #0088cc;
  color: white;
  padding: 0.7rem 1.5rem;
  text-decoration: none;
  border-radius: 6px;
  font-weight: 600;
}

.telegram-btn:hover {
  opacity: 0.9;
}

/* ================= MOBILE ================= */

@media (max-width: 768px) {

  .card-grid {
    flex-direction: column;
    align-items: center;
  }

  .login-section {
    width: 90%;
    padding: 2rem;
  }

}