* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: system-ui;
  background: #e0e5ec;
  min-height: 100vh;
}

/* ===== HEADER ===== */
.header {
  padding: 16px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
}
.header-content {
  max-width: 520px;
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.header-left,
.header-right {
  width: 60px;
}
.header-center {
  text-align: center;
  flex: 1;
}
.header-title {
  font-size: 15px;
  font-weight: 800;
}
.header-title span:last-child {
  display: block;
  font-size: 13px;
  font-weight: 600;
  opacity: 0.6;
}
.back-btn {
  width: 42px;
  height: 42px;
  border: none;
  border-radius: 50%;
  background: #e0e5ec;
  box-shadow: 6px 6px 12px #bec3c9, -6px -6px 12px #fff;
}
.back-btn svg {
  width: 22px;
  fill: #444;
}
.header-logo {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #e0e5ec;
  box-shadow: 6px 6px 12px #bec3c9, -6px -6px 12px #fff;
}

/* ===== Layout ===== */
.main {
  padding: 20px;
  display: flex;
  justify-content: center;
}
.container {
  width: 100%;
  max-width: 520px;
}
.card {
  background: #e0e5ec;
  border-radius: 28px;
  padding: 24px;
  box-shadow: 18px 18px 40px #bec3c9, -18px -18px 40px #fff;
}

select,
input {
  width: 100%;
  padding: 14px;
  margin-bottom: 14px;
  border-radius: 16px;
  border: none;
  text-align: center;
  box-shadow: inset 5px 5px 10px #cfd5dd, inset -5px -5px 10px #fff;
  outline: none;
  font-size: 14px;
}

/* QR Box */
.qr-box {
  width: 100%;
  height: 250px;
  background: #fff;
  border-radius: 18px;
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 16px;
  margin-top: 16px;
  cursor: pointer;
  box-shadow: inset 6px 6px 12px rgba(0, 0, 0, 0.08);
}

/* Buttons */
.btn-row {
  display: flex;
  gap: 10px;
  margin-bottom: 10px;
}
.btn {
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: 18px;
  background: #e0e5ec;
  font-weight: 700;
  box-shadow: 8px 8px 18px #bec3c9, -8px -8px 18px #fff;
}
.btn:active {
  box-shadow: inset 8px 8px 18px #bec3c9, inset -8px -8px 18px #fff;
}
.primary {
  background: linear-gradient(135deg, #667eea, #764ba2);
  color: #fff;
}