:root{--bg:#0d1117;--text:#e6edf3;--accent:#58a6ff;--pause:#f85149;--reset:#f0b429;--success:#3fb950;font-family:Inter,system-ui,sans-serif}body{background:var(--bg);color:var(--text);justify-content:center;align-items:center;height:100vh;margin:0;display:flex}.app-container{text-align:center}h1,h2{margin-bottom:1rem}.home,.stopwatch{background:#161b22;border-radius:16px;padding:2rem 3rem;box-shadow:0 4px 12px #0006}.controls{flex-wrap:wrap;justify-content:center;gap:1rem;display:flex}.btn{background:var(--accent);color:var(--text);cursor:pointer;border:none;border-radius:8px;padding:.6rem 1.2rem;font-weight:600;transition:transform .2s,background .2s}.btn:hover{transform:translateY(-2px)}.btn.pause{background:var(--pause)}.btn.reset{background:var(--reset);color:#000}.btn.resume{background:var(--success)}.btn.home{background:#30363d}