* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, sans-serif; background: #ffffff; color: #1d1d1f; line-height: 1.6; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; min-height: 100vh; display: flex; align-items: center; justify-content: center; }
.login-container { background: #ffffff; border-radius: 20px; padding: 48px; text-align: center; border: 1px solid #e5e5e7; max-width: 400px; width: 90%; box-shadow: 0 4px 6px rgba(0,0,0,0.05); }
.logo-section { display: flex; align-items: center; justify-content: center; gap: 12px; margin-bottom: 32px; }
.app-logo { width: 48px; height: 48px; border-radius: 10px; }
.app-title { font-size: 28px; font-weight: 600; color: #1d1d1f; }
h1 { color: #1d1d1f; margin-bottom: 16px; font-size: 28px; font-weight: 600; }
p { color: #86868b; margin-bottom: 32px; line-height: 1.5; font-size: 16px; }
.login-button { background: #007aff; color: #ffffff; border: none; padding: 16px 32px; border-radius: 8px; font-size: 16px; font-weight: 500; cursor: pointer; transition: background 0.2s ease; display: inline-flex; align-items: center; gap: 12px; margin-bottom: 24px; font-family: inherit; text-decoration: none; }
.login-button:hover { background: #0056cc; }
.back-link { color: #007aff; text-decoration: none; font-weight: 500; display: inline-flex; align-items: center; gap: 6px; }
.back-link:hover { text-decoration: underline; }
.auth-form { margin-bottom: 24px; }
.form-group { margin-bottom: 16px; }
.form-group input { width: 100%; padding: 12px 16px; border: 1px solid #e5e5e7; border-radius: 8px; font-size: 16px; font-family: inherit; background: #ffffff; transition: border-color 0.2s ease; }
.form-group input:focus { outline: none; border-color: #007aff; box-shadow: 0 0 0 3px rgba(0,122,255,0.15); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.login-button[disabled] { cursor: not-allowed; opacity: 0.7; }
.error-message { color: #ff3b30; background: #ffe5e5; padding: 12px; border-radius: 8px; margin-bottom: 16px; font-size: 14px; display: none; }
.success-message { color: #34c759; background: #e5ffe5; padding: 12px; border-radius: 8px; margin-bottom: 16px; font-size: 14px; display: none; }
@media (max-width: 768px) { .login-container { padding: 32px 24px; } h1 { font-size: 24px; } .app-title { font-size: 24px; } }