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

:root {
  --bg-primary: #000000;
  --bg-secondary: #0a0a0a;
  --bg-elevated: #141414;
  --bg-tertiary: #1a1a1a;
  
  --accent-primary: #7c3aed;
  --accent-primary-hover: #6d28d9;
  --accent-gradient: linear-gradient(135deg, #7c3aed 0%, #a855f7 100%);
  --accent-glow: rgba(124, 58, 237, 0.15);
  
  --success: #10b981;
  --danger: #ef4444;
  
  --text-primary: #ffffff;
  --text-secondary: #a1a1aa;
  --text-tertiary: #71717a;
  
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.15);
  
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Inter', 'Segoe UI', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background: radial-gradient(ellipse at top, rgba(124, 58, 237, 0.08) 0%, transparent 50%),
              linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.login-container {
  width: 100%;
  max-width: 440px;
  padding: 20px;
}

.login-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 48px 40px;
  text-align: center;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
}

.logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 16px;
}

.logo-icon {
  font-size: 36px;
  filter: drop-shadow(0 0 12px rgba(124, 58, 237, 0.6));
}

.logo h1 {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, #fff 0%, #a1a1aa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.highlight {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tagline {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.6;
  margin-bottom: 32px;
  font-weight: 400;
  letter-spacing: -0.01em;
}

.features {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 32px;
  padding: 24px 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.feature {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.feature-icon {
  font-size: 28px;
  filter: drop-shadow(0 0 8px rgba(124, 58, 237, 0.4));
}

.feature span:last-child {
  color: var(--text-tertiary);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: -0.01em;
}

.btn-google {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  width: 100%;
  padding: 14px 24px;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.btn-google:hover {
  background: var(--bg-elevated);
  border-color: var(--accent-primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(124, 58, 237, 0.2);
}

.google-icon {
  flex-shrink: 0;
}

.terms {
  margin-top: 24px;
  font-size: 12px;
  color: var(--text-tertiary);
  line-height: 1.6;
}

.terms a {
  color: var(--accent-primary);
  text-decoration: none;
  font-weight: 500;
}

.terms a:hover {
  text-decoration: underline;
}

@media (max-width: 480px) {
  .login-card {
    padding: 40px 24px;
  }

  .logo h1 {
    font-size: 22px;
  }

  .features {
    gap: 16px;
  }

  .feature-icon {
    font-size: 24px;
  }
}