*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: #07070d;
  color: #f0f0f5;
  min-height: 100vh;
}

.app {
  max-width: 420px;
  margin: 0 auto;
  padding: 24px 20px 40px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.header { text-align: center; margin-bottom: 28px; }
.logo {
  font-size: 22px;
  font-weight: 700;
  background: linear-gradient(90deg, #fff, #00d4ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.tagline { color: #888; margin-top: 6px; font-size: 15px; }

.card {
  background: #12121a;
  border: 1px solid #2a2a42;
  border-radius: 16px;
  padding: 24px;
  flex: 1;
}

.hidden { display: none !important; }

.hint { color: #aaa; margin-bottom: 16px; text-align: center; }
.divider { margin: 20px 0; color: #555; font-size: 14px; }

.code-input {
  width: 100%;
  font-size: 32px;
  letter-spacing: 8px;
  text-align: center;
  text-transform: uppercase;
  padding: 16px;
  border: 2px solid #2a2a42;
  border-radius: 12px;
  background: #0a0a0f;
  color: #00d4ff;
  margin-bottom: 16px;
}

.input {
  width: 100%;
  padding: 14px 16px;
  border: 2px solid #2a2a42;
  border-radius: 10px;
  background: #0a0a0f;
  color: #fff;
  font-size: 16px;
  margin-bottom: 14px;
}

.field-label {
  display: block;
  font-size: 13px;
  color: #888;
  margin-bottom: 6px;
}

.tabs {
  display: flex;
  gap: 8px;
  margin: 20px 0 16px;
}

.tab {
  flex: 1;
  padding: 12px;
  border: 2px solid #2a2a42;
  border-radius: 10px;
  background: #161625;
  color: #aaa;
  font-size: 14px;
  cursor: pointer;
}

.tab.active {
  border-color: #00d4ff;
  color: #fff;
  background: #0099cc33;
}

.btn {
  width: 100%;
  padding: 16px;
  border: none;
  border-radius: 12px;
  font-size: 17px;
  font-weight: 600;
  cursor: pointer;
  margin-top: 8px;
}

.btn.primary {
  background: linear-gradient(135deg, #0099cc, #00d4ff);
  color: #fff;
}

.btn:disabled { opacity: 0.6; cursor: wait; }

.pair-badge {
  text-align: center;
  padding: 16px;
  background: #161625;
  border-radius: 12px;
  margin-bottom: 20px;
}

.pair-badge .label { display: block; font-size: 12px; color: #888; }
.pair-badge strong { font-size: 20px; display: block; margin: 4px 0; }
.code-display {
  display: inline-block;
  margin-top: 8px;
  padding: 4px 12px;
  background: #00d4ff22;
  color: #00d4ff;
  border-radius: 6px;
  font-weight: 700;
  letter-spacing: 2px;
}

.error { color: #ff4757; font-size: 14px; margin: 8px 0; text-align: center; }

.success-card { text-align: center; padding: 40px 24px; }
.success-icon {
  width: 64px; height: 64px;
  margin: 0 auto 16px;
  background: #2ed57333;
  color: #2ed573;
  border-radius: 50%;
  font-size: 32px;
  line-height: 64px;
}

.footer { text-align: center; margin-top: 24px; }
.footer a { color: #666; text-decoration: none; font-size: 13px; }