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

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", sans-serif;
  background: #0a0a0a;
  color: #e5e5e5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 480px;
  margin: 0 auto;
  padding: 24px 16px;
}

header {
  text-align: center;
  padding: 32px 0 24px;
}

header h1 {
  font-size: 28px;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.5px;
}

header p {
  margin-top: 8px;
  font-size: 15px;
  color: #888;
}

.empty-state {
  text-align: center;
  padding: 64px 16px;
  color: #666;
  font-size: 15px;
}

.build-card {
  background: #1a1a1a;
  border: 1px solid #2a2a2a;
  border-radius: 16px;
  padding: 20px;
  margin-bottom: 12px;
  transition: border-color 0.2s;
}

.build-card:hover {
  border-color: #3a3a3a;
}

.build-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
}

.build-name {
  font-size: 17px;
  font-weight: 600;
  color: #fff;
}

.build-version {
  font-size: 13px;
  color: #888;
  background: #252525;
  padding: 3px 10px;
  border-radius: 12px;
  white-space: nowrap;
}

.build-meta {
  display: flex;
  gap: 16px;
  font-size: 13px;
  color: #666;
  margin-bottom: 16px;
}

.install-btn {
  display: block;
  width: 100%;
  padding: 14px;
  background: #2563eb;
  color: #fff;
  border: none;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
  text-decoration: none;
  transition: background 0.2s;
  -webkit-tap-highlight-color: transparent;
}

.install-btn:hover {
  background: #1d4ed8;
}

.install-btn:active {
  background: #1e40af;
}

.desktop-hint {
  display: block;
  width: 100%;
  padding: 14px;
  background: #1a1a1a;
  color: #666;
  border: 1px dashed #333;
  border-radius: 12px;
  font-size: 14px;
  text-align: center;
}

.loading {
  text-align: center;
  padding: 64px 16px;
  color: #666;
}

.spinner {
  width: 24px;
  height: 24px;
  border: 2px solid #333;
  border-top-color: #2563eb;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 12px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}