:root{font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5;color-scheme:light}body{margin:0;background-color:#f8f9fc;color:#1a1d1e}*{box-sizing:border-box}button{cursor:pointer}.nav{display:flex;gap:8px;align-items:center;padding:10px 16px;background:#2d3436;color:#fff}.nav .brand{font-weight:700;margin-right:8px}.nav a{color:#cfd8dc;text-decoration:none;padding:6px 10px;border-radius:6px}.nav a.active{background:#00ba88;color:#fff}.nav .spacer{flex:1}.container{max-width:920px;margin:0 auto;padding:16px}.card{background:#fff;border-radius:12px;padding:16px;box-shadow:0 2px 8px #1a1d1e14;margin-bottom:16px}.card h2{margin:0 0 12px;font-size:16px}.row{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}label{font-size:12px;color:#6c757d}.summary{background:linear-gradient(135deg,#2d3436,#636e72);color:#fff;border-radius:14px;padding:20px;margin-bottom:16px}.summary .total{font-size:30px;font-weight:700}.positive{color:#81c784}.negative{color:#e57373}button.primary{background:#2d3436;color:#fff;border:none;padding:8px 16px;border-radius:8px}button.primary:hover{background:#414a4d}button.secondary{background:#e9ecef;color:#1a1d1e;border:none;padding:8px 16px;border-radius:8px}button.danger{background:#c62828;color:#fff;border:none;padding:6px 12px;border-radius:8px}table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:8px;border-bottom:1px solid #eee}input,select{padding:6px 8px;border:1px solid #ccc;border-radius:6px;font-size:14px}.form-group{display:flex;flex-direction:column;gap:4px;margin-bottom:10px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.auth-screen{max-width:420px;margin:80px auto;text-align:center;background:#fff;padding:32px;border-radius:16px;box-shadow:0 4px 16px #1a1d1e1a}.auth-screen .logo{font-size:24px;font-weight:800;margin-bottom:8px}.error{color:#c62828;font-size:13px}.empty{color:#6c757d;padding:24px;text-align:center}.admin-badge{background:#fff3e0;color:#e65100;padding:3px 8px;border-radius:4px;font-size:12px}.login-btn{background:#4285f4;color:#fff;border:none;padding:12px 24px;font-size:15px;border-radius:8px}.login-btn:hover{background:#3367d6}