* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  width: 100%;
  background-color: #121318;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.activation-page {
  width: 100%;
  max-width: 440px;
  padding: 20px;
  box-sizing: border-box;
  display: flex;
  justify-content: center;
}

.activation-card {
  width: 100%;
  background-color: #1c1e24;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 24px;
  padding: 32px 24px;
  box-sizing: border-box;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.6);
  opacity: 0;
  transition: opacity 0.2s ease-in-out;
}

.activation-title {
  font-size: 24px;
  font-weight: 700;
  color: #ffffff;
  margin: 0 0 8px 0;
}

.activation-desc {
  font-size: 14px;
  color: #9aa0a6;
  line-height: 1.4;
  margin: 0 0 24px 0;
}

.activation-form {
  display: flex;
  flex-direction: column;
}

.activation-label {
  font-size: 14px;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 8px;
}

.activation-input-row {
  display: flex;
  gap: 10px;
  align-items: center;
}

.activation-input {
  flex: 1;
  background-color: #16171d;
  border: 1px solid #2e323e;
  border-radius: 14px;
  padding: 14px 16px;
  font-size: 15px;
  color: #ffffff;
  letter-spacing: 1.5px;
  outline: none;
  transition: border-color 0.2s;
  box-sizing: border-box;
  font-family: monospace, inherit;
  text-transform: uppercase;
}

.activation-input::placeholder {
  color: #555b6a;
  letter-spacing: 1px;
  text-transform: none;
  font-family: inherit;
}

.activation-input:focus {
  border-color: #3b9af8;
}

.activation-paste-btn {
  background-color: #3b9af8;
  color: #ffffff;
  border: none;
  border-radius: 20px;
  padding: 12px 22px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: opacity 0.2s;
}

.activation-paste-btn:active {
  opacity: 0.8;
}

.activation-hint {
  font-size: 13px;
  color: #646a78;
  margin: 8px 0 24px 0;
}

.activation-error {
  font-size: 13px;
  color: #f87171;
  margin: -12px 0 16px 0;
  display: none;
  text-align: center;
  line-height: 1.4;
}

.activation-submit-btn {
  width: 100%;
  background-color: #3b9af8;
  color: #ffffff;
  border: none;
  border-radius: 25px;
  padding: 16px;
  font-size: 17px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.1s;
  box-sizing: border-box;
}

.activation-submit-btn:active {
  opacity: 0.85;
  transform: scale(0.99);
}

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