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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: #e0e5ec;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  -webkit-user-select: none;
  user-select: none;
}

.container {
  text-align: center;
  padding: 20px;
  width: 100%;
  max-width: 400px;
}

header {
  margin-bottom: 40px;
}

h1 {
  font-size: 2rem;
  font-weight: 700;
  color: #2d3436;
  letter-spacing: -0.5px;
}

.version {
  margin-top: 4px;
  font-size: 0.85rem;
  color: #a3a9b5;
  font-weight: 500;
}

.status {
  min-height: 48px;
  margin-bottom: 24px;
  padding: 12px 16px;
  border-radius: 16px;
  background: #e0e5ec;
  box-shadow: inset 4px 4px 8px #b8bec8, inset -4px -4px 8px #ffffff;
  font-size: 0.9rem;
  color: #636e72;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1.4;
  transition: opacity 0.3s;
}

.status.error {
  color: #d63031;
  box-shadow: inset 4px 4px 8px #c8b8b8, inset -4px -4px 8px #ffe8e8;
}

.activate-btn {
  display: block;
  margin: 0 auto 24px;
  padding: 14px 36px;
  border: none;
  border-radius: 50px;
  background: #e0e5ec;
  box-shadow: 6px 6px 12px #b8bec8, -6px -6px 12px #ffffff;
  font-size: 1rem;
  font-weight: 600;
  color: #2d3436;
  cursor: pointer;
  transition: all 0.15s;
}

.activate-btn:active {
  box-shadow: inset 4px 4px 8px #b8bec8, inset -4px -4px 8px #ffffff;
  color: #636e72;
}

.card {
  width: 200px;
  height: 200px;
  margin: 0 auto;
  border-radius: 32px;
  background: #e0e5ec;
  box-shadow: 10px 10px 20px #b8bec8, -10px -10px 20px #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.1s ease-out;
  will-change: transform;
}

.card-inner {
  width: 140px;
  height: 140px;
  border-radius: 24px;
  background: #e0e5ec;
  box-shadow: inset 5px 5px 10px #b8bec8, inset -5px -5px 10px #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-label {
  font-size: 1.2rem;
  font-weight: 600;
  color: #a3a9b5;
  letter-spacing: 1px;
  text-transform: uppercase;
}