* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%); min-height: 100vh; color: #fff; }
#root { min-height: 100vh; }
#loading { display: flex; flex-direction: column; justify-content: center; align-items: center; height: 100vh; color: rgba(255,255,255,0.7); }
.spinner { width: 40px; height: 40px; border: 3px solid rgba(255,255,255,0.2); border-top-color: #667eea; border-radius: 50%; animation: spin 1s linear infinite; margin-top: 20px; }
@keyframes spin { to { transform: rotate(360deg); } }
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: rgba(255,255,255,0.05); }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.2); border-radius: 4px; }
input::placeholder, textarea::placeholder { color: rgba(255,255,255,0.4); }
select option { background: #1a1a2e; color: #fff; }
button { transition: transform 0.2s, box-shadow 0.2s; }
button:hover:not(:disabled) { transform: translateY(-1px); }
button:disabled { cursor: not-allowed; opacity: 0.5; }
@media (max-width: 768px) { .clock-time { font-size: 36px !important; } .tracking-time { font-size: 40px !important; } }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.4; } }